Manufacturing device for wire-wound resistance temperature detector

Abstract

The utility model discloses a manufacturing device for a wire-wound resistance temperature detector. The manufacturing device comprises a rack, the main shaft module is arranged on the rack and used for clamping and driving the capillary tube to rotate; the fixing seat is fixed on the main shaft module and is used for fixing one end of the resistance wire; the feeding module is arranged on the rack and can move left and right in the axial direction of the capillary tube, and a tensioner is arranged on the feeding module to guide the resistance wire; the limiting mechanism is arranged on the rack, and the limiting mechanism is used for positioning the capillary tube to a fixed axial reference position when the capillary tube is loaded; the device has the advantages that the problems of different initial positions, non-uniform turn spacing and tension fluctuation caused by manual operation are solved, and high-precision and high-quality batch production of the wire-wound resistor temperature detector is ensured.

Description

Technical Field

[0001] This utility model relates to the field of resistance temperature detector manufacturing technology, and in particular to a resistance temperature detector manufacturing device. Background Technology

[0002] Resistance temperature detectors (RTDs) are among the most widely used high-precision temperature sensors in industrial, scientific, medical, and metrology fields. Among their many types, wire-wound RTDs, especially platinum (Pt) RTDs (such as Pt100 and Pt1000), are recognized as the benchmark and standard for high precision due to their extremely high measurement accuracy, excellent long-term stability, good repeatability, and wide temperature range. The core technology of wire-wound RTDs lies in the uniform and tight winding of extremely fine platinum resistance wires onto an insulating frame (such as a ceramic capillary). The quality of this winding process, including the tension control of the resistance wire, the uniformity of the turn spacing, and the overall stability of the winding, directly determines the electrical performance, response time, and vibration resistance of the finished RTD. Therefore, developing high-precision, high-consistency wire-wound RTD manufacturing equipment is of great significance for improving the performance and mass production capabilities of high-end temperature sensors.

[0003] In current technological practices, the fabrication of wire-wound resistance temperature detectors, especially small-batch or high-precision prototypes, still largely relies on manual labor or simple auxiliary tooling. Specifically, operators typically use a simple fixture to hold the capillary frame in place, such as fixing one end to a miniature chuck or a hand-cranked rotary table. The arrangement and guidance of the resistance wire are entirely controlled manually. The operator needs to slowly rotate the capillary frame with one hand while using tweezers or a simple guide needle in the other, relying on experience and visual inspection (or with the aid of a magnifying glass) to control the tension and turn spacing of the resistance wire. Throughout the winding process, the uniformity of the winding, the accuracy of the inter-wire spacing, and the consistency between different batches of products depend entirely on the operator's skill and physical conditions, lacking reliable mechanical precision guarantees.

[0004] The aforementioned manual manufacturing method has the following drawbacks. First, production efficiency is insufficient. This method relies entirely on manual operation, is time-consuming and labor-intensive, and cannot meet the demands of large-scale, standardized production. Second, process precision is difficult to control. Since the performance of high-precision RTDs highly depends on the precise control of the gap between turns during the resistance wire winding process, under manual operation, this micron-level gap control relies entirely on the operator's visual observation and manual adjustment. Lacking repeatable mechanical assurance, it easily leads to uneven gaps or tension fluctuations, severely affecting the consistency of the finished product's electrical performance and batch pass rate. Utility Model Content

[0005] The purpose of this invention is to provide a device for manufacturing a wire-wound resistance temperature detector to solve the problems of low efficiency and uncontrollable accuracy in manual operations.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a device for manufacturing a wire-wound resistance temperature detector, comprising,

[0007] frame;

[0008] The spindle module, mounted on the frame, is used to clamp and rotate the capillary tube;

[0009] A mounting base, fixed on the spindle module, is used to fix one end of the resistance wire;

[0010] A feed module is mounted on the frame and can move left and right along the axial direction of the capillary. A tensioner is mounted on the feed module to guide the resistance wire.

[0011] A limiting mechanism is provided on the frame, which is used to position the capillary tube to a fixed axial reference position when the capillary tube is loaded.

[0012] Preferably, the spindle module includes a housing, a drive mechanism disposed within the housing, a rear extension rod, and a manual clamping mechanism. The housing is fixed to the frame, the rear extension rod is rotatably disposed within the housing, the drive mechanism is used to drive the rear extension rod to rotate, thereby causing the capillary to rotate, and the manual clamping mechanism is disposed within the rear extension rod and is used to fix the capillary to the rear extension rod.

[0013] Preferably, the manual clamping mechanism includes a chuck, a tensioning sleeve, and a screw. The chuck has a clamping cavity for inserting a capillary tube. At least one slit communicating with the clamping cavity is formed along the axial direction on the side wall of the chuck. The chuck is located inside the tensioning sleeve, which is disposed inside the rear extension rod. The tensioning sleeve has an outer conical surface that contacts the inner wall of the rear extension rod. The screw is disposed inside the rear extension rod and connected to the tensioning sleeve. It is configured to be manually rotated to drive the tensioning sleeve to move axially and be pulled into the rear extension rod, causing the tensioning sleeve to contract radially and clamp the chuck inside, thereby achieving the clamping of the capillary tube by the chuck.

[0014] Preferably, the drive mechanism includes a drive motor, a first pulley, a second pulley, and a timing belt. The drive motor is fixed inside the housing. The first pulley is disposed on the output shaft of the drive motor. The timing belt connects the first pulley and the second pulley. The second pulley is coaxially fixed on the rear extension rod.

[0015] Preferably, the feed module is a linear motor module, the tensioner is fixed on the linear motor module, and a mounting component is connected to one side of the tensioner. A guide needle for the resistance wire to pass through is fixed on the mounting component.

[0016] Preferably, the mounting component is provided with an adjustment groove, and the tensioner is connected to an adjustment bolt, which passes through the adjustment groove to adjust the position of the mounting component relative to the tensioner.

[0017] Preferably, the limiting mechanism includes a moving motor, a lead screw, a nut seat, a support, and a limiting needle. The moving motor is fixed on the frame and is used to drive the lead screw to rotate. The nut seat is screwed to the lead screw. The support is fixed on the nut seat. The limiting needle is fixed on the support and is used to abut against the end of the capillary tube to achieve axial reference positioning.

[0018] Preferably, the device also includes a camera module and a display screen. The camera module is mounted on the frame and is used to observe the winding state of the resistance wire on the capillary. The display screen is electrically connected to the camera module to display the observed image.

[0019] Compared with the prior art, the advantages of this utility model are as follows: Before winding begins, the capillary is loaded onto the spindle module. During loading, the limiting mechanism set on the frame is activated to position the capillary at a fixed axial reference position, which ensures that the starting point of each clamping is highly consistent. Subsequently, one end of the resistance wire is fixed on the fixed seat that rotates together with the spindle module. When winding begins, the spindle module drives the clamped capillary to rotate. At the same time, the feed module set on the frame moves left and right along the axial direction of the capillary. The tensioner on it provides constant tension while guiding the resistance wire. Through the coordination of the rotational movement of the spindle module and the linear movement of the feed module, the resistance wire is evenly and tightly wound on the surface of the capillary.

[0020] The advantage of this structure is that it not only greatly improves production efficiency, but also fundamentally solves the problems of inconsistent starting positions, uneven turn spacing and tension fluctuations caused by manual operation, thus ensuring high precision and high-quality mass production of wire-wound resistance temperature detectors. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0022] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0023] Figure 2 This is a three-dimensional structural diagram of the spindle module in this utility model;

[0024] Figure 3 This is a three-dimensional structural diagram of the internal structure of the spindle module in this utility model;

[0025] Figure 4 This is a three-dimensional structural diagram of the rear extension rod and the second pulley in this utility model.

[0026] Figure 5 This utility model Figure 4 A sectional view;

[0027] Figure 6 This utility model Figure 4 A schematic diagram of the three-dimensional structure in its decomposed state;

[0028] Figure 7 This is a three-dimensional structural diagram of the limiting mechanism in this utility model;

[0029] Figure 8 This is a three-dimensional structural diagram of the tensioner in this utility model;

[0030] In the diagram, 1. Frame; 2. Spindle module; 3. Fixed base; 4. Feed module; 5. Tensioner; 6. Limiting mechanism; 7. Housing; 8. Drive mechanism; 9. Rear extension rod; 10. Manual clamping mechanism; 11. Chuck; 12. Tensioning sleeve; 13. Screw; 14. Drive motor; 15. First pulley; 16. Second pulley; 17. Synchronous belt; 18. Mounting component; 19. Guide pin; 20. Adjusting bolt; 21. Moving motor; 22. Lead screw; 23. Nut seat; 24. Support; 25. Limiting pin; 26. Camera module; 27. Display screen. Detailed Implementation

[0031] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0032] Example 1: As Figures 1-8 As shown, an apparatus for manufacturing a wire-wound resistance temperature detector includes,

[0033] Rack 1;

[0034] The spindle module 2, mounted on the frame 1, is used to clamp and drive the capillary tube to rotate;

[0035] The mounting base 3 is fixed on the spindle module 2 and is used to fix one end of the resistance wire.

[0036] The feed module 4 is mounted on the frame 1 and can move left and right along the axial direction of the capillary. The feed module 4 is equipped with a tensioner 5 to guide the resistance wire.

[0037] A limiting mechanism 6 is provided on the frame 1. The limiting mechanism 6 is used to position the capillary tube to a fixed axial reference position when the capillary tube is loaded.

[0038] Example 2: Figures 1-8 As shown, unlike Embodiment 1, the spindle module 2 includes a housing 7, a drive mechanism 8 disposed within the housing 7, a pull-out extension rod 9, and a manual clamping mechanism 10. The housing 7 is fixed on the frame 1, the pull-out extension rod 9 is rotatably disposed within the housing 7, the drive mechanism 8 is used to drive the pull-out extension rod 9 to rotate, thereby driving the capillary to rotate, and the manual clamping mechanism 10 is disposed within the pull-out extension rod 9 and is used to fix the capillary to the pull-out extension rod 9.

[0039] In the above structure, the housing 7 integrates the drive mechanism 8 and the manual clamping mechanism 10. The drive mechanism 8 is dedicated to providing rotational power, which drives the rear extension rod 9 to rotate within the housing 7, thereby driving the capillary to rotate for winding operations. The manual clamping mechanism 10 is an independent system, which is dedicated to securing the capillary to the rear extension rod 9 by manual operation.

[0040] The advantage of this design is that it completely separates the power drive function from the workpiece clamping function. The drive mechanism 8 is only responsible for providing smooth rotation, while the manual clamping mechanism 10 ensures reliable and stable clamping force. This structural separation design significantly improves the stability of the spindle module 2, the reliability of clamping, and the flexibility of operation.

[0041] In this embodiment, the manual clamping mechanism 10 includes a chuck 11, a tensioning sleeve 12, and a screw 13. The chuck 11 has a clamping cavity for inserting a capillary tube. At least one slit communicating with the clamping cavity is provided on the side wall of the chuck 11 along its axial direction. The chuck 11 is located inside the tensioning sleeve 12, which is disposed inside the rear extension rod 9. The tensioning sleeve 12 has an outer conical surface that contacts the inner wall of the rear extension rod 9. The screw 13 is disposed inside the rear extension rod 9 and connected to the tensioning sleeve 12. It is configured to be manually rotated to drive the tensioning sleeve 12 to move axially and be pulled into the rear extension rod 9, so that the tensioning sleeve 12 is radially compressed and contracted, thereby clamping the chuck 11 inside the tensioning sleeve 12, so that the chuck 11 clamps the capillary tube.

[0042] The manual clamping mechanism 10 utilizes a double compression principle to achieve firm clamping. Its working method is as follows: when the screw 13 located inside the rear extension rod 9 is manually rotated, the tension sleeve 12 connected to the screw 13 will be driven by the threaded transmission, move axially and be pulled into the rear extension rod 9. During this process, the outer conical surface of the tension sleeve 12 will contact and be compressed with the inner wall of the rear extension rod 9. This causes the tension sleeve 12 to be radially compressed and contracted. Since the chuck 11 is located inside the tension sleeve 12, the contraction of the tension sleeve 12 will further tighten the chuck 11 inside it. Finally, due to the compression, the axially opened slit on the side wall of the chuck 11 causes its clamping cavity to contract, thereby firmly clamping the capillary tube in the clamping cavity for capillary tube insertion.

[0043] The advantage of this structure is that it provides a strong manual clamping force through the screw 13 and the conical surface, and provides a highly concentric and uniformly stable clamping effect through the secondary compression of the chuck 11 by the tensioning sleeve 12.

[0044] Example 3: Figures 1-8 As shown, unlike Embodiment 2, the drive mechanism 8 includes a drive motor 14, a first pulley 15, a second pulley 16, and a synchronous belt 17. The drive motor 14 is fixed inside the housing 7. The first pulley 15 is mounted on the output shaft of the drive motor 14. The synchronous belt 17 connects the first pulley 15 and the second pulley 16. The second pulley 16 is coaxially fixed on the rear extension rod 9.

[0045] When the drive motor 14 is working, its power is transmitted to the first pulley 15 through its output shaft, causing it to rotate. Since the synchronous belt 17 connects the first pulley 15 and the second pulley 16, the rotation of the first pulley 15 is transmitted to the second pulley 16 through the synchronous belt 17. Finally, since the second pulley 16 is coaxially fixed on the rear extension rod 9, the rotation of the second pulley 16 directly drives the rear extension rod 9 to rotate, thereby providing power for the rotation and winding of the capillary.

[0046] The advantage of this design is that it uses a synchronous belt 17 drive, which, compared to gear drives or friction belt drives, has the characteristics of accurate transmission, no slippage, and constant transmission ratio, ensuring that the rear extension rod 9 rotates smoothly and accurately.

[0047] In this embodiment, the feed module 4 is a linear motor module, the tensioner 5 is fixed on the linear motor module, and a mounting part 18 is connected to one side of the tensioner 5. A guide needle 19 for the resistance wire to pass through is fixed on the mounting part 18.

[0048] The core design of this feed module 4 lies in its use of a linear motor module as a high-precision motion actuator. Its structural layout is such that the tensioner 5 is directly fixed to the moving part of the linear motor module, and the tensioner 5 is connected and fixed to the guide needle 19 through the mounting part 18 on one side. In this way, when the linear motor module moves with high precision along the capillary axis, it drives the entire tensioner 5 and guide needle 19 assembly to move synchronously. After the resistance wire obtains constant tension from the tensioner 5, it passes through the precise guide hole of the guide needle 19 and is finally laid on the capillary, which greatly improves the winding quality and consistency.

[0049] In this embodiment, the mounting component 18 is provided with an adjustment groove, and the tensioner 5 is connected with an adjustment bolt 20. The adjustment bolt 20 passes through the adjustment groove to adjust the position of the mounting component 18 relative to the tensioner 5.

[0050] In the above structure, the adjusting bolt 20 connected to the tensioner 5 passes through the adjusting groove provided on the mounting part 18. When adjustment is required, the nut matching the adjusting bolt 20 can be loosened first. At this time, the mounting part 18 can use the margin provided by the adjusting groove to slide or finely adjust its position relative to the tensioner 5. After the mounting part 18 is adjusted to the required position, the adjusting bolt 20 is tightened to securely lock the mounting part 18 in the new relative position.

[0051] The advantage of this design is that it provides a simple and effective fine-tuning capability, allowing precise adjustment of the position of the mounting component 18 relative to the tensioner 5, ensuring the assembly accuracy between the two or meeting the alignment requirements under different working conditions, and significantly improving the flexibility and adjustability of the equipment.

[0052] In this embodiment, the limiting mechanism 6 includes a moving motor 21, a lead screw 22, a nut seat 23, a support 24, and a limiting needle 25. The moving motor 21 is fixed on the frame 1 and is used to drive the lead screw 22 to rotate. The nut seat 23 is screwed to the lead screw 22. The support 24 is fixed on the nut seat 23. The limiting needle 25 is fixed on the support 24 and is used to abut against the end of the capillary tube to achieve axial reference position positioning.

[0053] When the moving motor 21 starts, it drives the lead screw 22 to rotate. Since the nut seat 23 is screwed to the lead screw 22, the rotational motion of the lead screw 22 is precisely converted into the linear motion of the nut seat 23. The support 24 is fixed on the nut seat 23 and moves synchronously with it, thereby driving the limiting needle 25 fixed on the support 24 to translate. By controlling the rotation of the moving motor 21, the limiting needle 25 is finally driven to the predetermined position and used to abut the end of the capillary tube, thereby achieving the positioning of the axial reference position.

[0054] In this embodiment, a camera module 26 and a display screen 27 are also included. The camera module 26 is mounted on the frame 1 and is used to observe the winding state of the resistance wire on the capillary. The display screen 27 is electrically connected to the camera module 26 to display the observed image.

[0055] A camera module 26 mounted on rack 1 is used to capture the real-time winding state of the resistance wire on the capillary tube and convert the acquired optical signals into electrical signals. Since the display screen 27 is electrically connected to the camera module 26, the image observed by the camera module 26 is transmitted and displayed on the display screen 27 in real time. The advantage of this design is that it provides the operator with an intuitive, magnified real-time monitoring interface. The operator can clearly observe microscopic winding details that are difficult to distinguish with the naked eye through the display screen 27, such as the gap between turns or the neatness of the arrangement, thereby enabling real-time evaluation and control of the winding quality.

[0056] The following is the specific usage process of this device: First, in the preparation stage, the operator can input the winding parameters through the display screen 27 and adjust the precise position of the guide needle 19 by adjusting the position of the adjusting bolt 20 in the adjusting groove.

[0057] When loading the capillary tube, the limiting mechanism 6 is activated, and its moving motor 21 drives the lead screw 22 to rotate, causing the nut seat 23 and the support 24 to move, pushing the limiting needle 25 to the predetermined position. The operator inserts the capillary tube into the main shaft module 2, so that it enters the clamping cavity of the chuck 11 until the end of the capillary tube abuts against the limiting needle 25, thereby achieving a fixed axial reference position positioning.

[0058] Subsequently, the operator uses the manual clamping mechanism 10 to clamp the capillary tube: by manually rotating the screw 13, the tension sleeve 12 is pulled into the extension rod 9. During this process, the tension sleeve 12 is radially compressed and contracts due to the contact between its outer conical surface and the inner wall of the extension rod 9, which in turn causes the internal clamp 11 to contract, thus firmly clamping the capillary tube.

[0059] Next, one end of the resistance wire is passed through the tensioner 5 and the guide needle 19 and fixed on the fixed base 3. When the first section is wound, the drive motor 14 of the drive mechanism 8 is started, which drives the extension rod 9 and the capillary to rotate. At the same time, the linear motor module of the feed module 4 begins to move along the capillary axis, winding the first section of heating wire onto the capillary.

[0060] Throughout the process, the camera module 26 observes the winding state of the resistance wire on the capillary in real time and displays the observed images on the display screen 27.

[0061] After the first section of heating wire is wound, apply high-temperature fixing adhesive to fix the first section of heating wire to prevent it from loosening. After it solidifies, the operator loosens the manual clamping mechanism 10, turns the capillary tube around, reinstalls it, and re-clamps it. Then, the equipment is started to wind the second section of heating wire. After all the winding is completed, the manual clamping mechanism 10 is loosened and the finished product can be taken out.

[0062] The above description is merely an embodiment of this application and does not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A wire-wound resistance temperature detector fabrication apparatus, characterized by comprising: The application relates to a device for winding resistance wire on a capillary tube, which comprises a rack, a spindle module arranged on the rack for clamping and driving the capillary tube to rotate, a fixing base fixed on the spindle module for fixing one end of the resistance wire, a feeding module arranged on the rack and capable of moving left and right along the axial direction of the capillary tube, a tensioner arranged on the feeding module for guiding the resistance wire, and a limiting mechanism arranged on the rack for positioning the capillary tube to a fixed axial reference position when the capillary tube is loaded. The spindle module comprises a shell, a driving mechanism arranged in the shell, a rear pull extension rod and a manual clamping mechanism, the shell is fixed on the rack, the rear pull extension rod is rotatably arranged in the shell, the driving mechanism is used for driving the rear pull extension rod to rotate to drive the capillary tube to rotate, and the manual clamping mechanism is arranged in the rear pull extension rod and used for fixing the capillary tube on the rear pull extension rod. The manual clamping mechanism comprises a chuck, a tension sleeve and a screw rod, the chuck has a clamping cavity for inserting the capillary tube, at least one slit is formed in the side wall of the chuck along the axial direction and communicates with the clamping cavity, the chuck is arranged in the tension sleeve, the tension sleeve is arranged in the rear pull extension rod, the tension sleeve has an outer taper surface in contact with the inner wall of the rear pull extension rod, the screw rod is arranged in the rear pull extension rod and connected with the tension sleeve and is configured to be manually rotated to drive the tension sleeve to move axially and be pulled into the rear pull extension rod, so that the tension sleeve is radially extruded and shrunk, and the tension sleeve clamps the chuck in the tension sleeve to clamp the capillary tube by the chuck. The driving mechanism comprises a driving motor, a first pulley, a second pulley and a synchronous belt, the driving motor is fixed in the shell, the first pulley is arranged on the output shaft of the driving motor, the synchronous belt connects the first pulley and the second pulley, and the second pulley is coaxially fixed on the rear pull extension rod. The feeding module is a linear motor module, the tensioner is fixed on the linear motor module, one side of the tensioner is connected with a mounting piece, and a guide needle for the resistance wire to pass through is fixed on the mounting piece. Adjusting grooves are arranged on the mounting piece, adjusting bolts are connected with the tensioner, and the adjusting bolts are arranged in the adjusting grooves to adjust the position of the mounting piece relative to the tensioner.

2. A wire-wound resistance temperature detector fabrication device according to claim 1, wherein The limiting mechanism comprises a moving motor, a screw rod, a nut base, a support and a limiting needle, the moving motor is fixed on the rack and used for driving the screw rod to rotate, the nut base is screwed with the screw rod, the support is fixed on the nut base, and the limiting needle is fixed on the support and used for abutting against the end of the capillary tube to realize positioning of the axial reference position.

3. An apparatus for making a wire-wound resistance temperature detector as defined in claim 2, wherein The device further comprises a camera module and a display screen, the camera module is arranged on the rack and used for observing the winding state of the resistance wire on the capillary tube, and the display screen is electrically connected with the camera module to display the observed image.

4. A wire-wound resistance temperature detector fabrication device according to claim 2, wherein ​ 5. The wire-wound RTD fabrication device of claim 1, wherein, ​ 6. An apparatus for making a wire-wound resistance temperature detector according to claim 5, wherein ​ 7. A wire-wound RTD fabrication device according to claim 1, wherein, ​ 8. The wire-wound RTD fabrication device of claim 1, wherein, ​

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