Straightening and cutting device for capillary needle pipeline

Abstract

The straightening and cutting device comprises a straightening mechanism, a cutting mechanism and a metering mechanism, the metering mechanism comprises a rotating shaft, a rotating disc and a metering assembly, the rotating disc is coaxially and rotatably connected to the rotating shaft, a clamping groove for clamping the capillary needle pipeline is coaxially formed in the circumferential side face of the rotating disc, and the metering assembly is arranged in the clamping groove. The metering assembly comprises a magnetic field sensor and a magnetic block fixed to the rotating disc, the magnetic field sensor is in electric signal connection with the cutting mechanism, the projection of the magnetic field sensor in the axial direction of the rotating shaft falls on the circular track of the magnetic block rotating along with the rotating disc, and the capillary needle pipeline is pulled to drive the rotating disc to rotate. The traction distance of the capillary needle pipeline is equal to the circumferential rotation distance of the rotary disc, the magnetic field inductor records the number of rotation turns of the rotary disc, transmits an electric signal to the cutting mechanism and controls the cutting mechanism to cut the capillary needle pipeline, a visual or entity switch touch mode is not needed, the cutting length can be conveniently and stably controlled, and the production efficiency is higher.

Description

Technical Field

[0001] This application relates to the field of capillary needle preparation, and in particular to a device for straightening and cutting capillary needle tubing. Background Technology

[0002] Capillary tubes are the raw material for making capillary needles. They are rolled hollow thin tubes with an outer diameter between 0.05 and 0.15 mm. In the process of producing capillary needles, the rolled capillary tubes need to be stretched and straightened first, and then cut into capillary tubes of different specifications within 5 to 20 cm according to the processing requirements of the intermediate parts.

[0003] Current technology, such as the Chinese patent with publication number CN210413475U, describes a metal capillary cutting and straightening device, which includes a straightening mechanism and a cutting mechanism. Capillary needles can be straightened and cut using this device, but its control over the cutting length of the capillary needles is somewhat lacking. It requires manual intervention or the use of a camera recognition component to identify the position where the capillary needle end is being pulled, and then the cutting mechanism is activated for cutting. However, the capillary needles are indeed very thin, and the vibration at the end of the capillary needle makes identification difficult and inconvenient.

[0004] In response, the applicant has attempted to use microswitch contacts and other methods to access and record the length of the capillary tube being pulled. However, due to the small mass per unit length of the capillary tube and its relatively softness in its uncut length, it is difficult to activate with a general microswitch. Microswitches that can be activated are too sensitive and often mis-activate when subjected to vibration. Therefore, the applicant hopes to develop and improve it to solve the problem of inconvenient control of the cut length of the capillary tube. Utility Model Content

[0005] To more conveniently control the cutting length of capillary needle wires, a straightening and cutting device for capillary needle wires is provided.

[0006] The above-mentioned inventive objective of this application is achieved through the following technical solutions:

[0007] A straightening and cutting device for capillary needles includes a straightening mechanism and a cutting mechanism, and further includes a measuring mechanism. The measuring mechanism includes a rotating shaft, a turntable, and a measuring component. The turntable is coaxially rotatably connected to the rotating shaft. The circumferential side of the turntable has a slot coaxially formed for the capillary needle to be inserted. The measuring component includes a magnetic field sensor and a magnetic block fixed on the turntable. The magnetic field sensor is electrically connected to the cutting mechanism. The projection of the magnetic field sensor in the axial direction of the rotating shaft falls on the circular trajectory of the magnetic block as the turntable rotates.

[0008] By adopting the above technical solution, the capillary tube first passes through the slot, then enters the straightening mechanism, and then enters the cutting mechanism. In this way, the capillary tube is pulled, which drives the turntable to rotate. The pulling distance of the capillary tube is equal to the circumferential rotation distance of the turntable. When the turntable rotates once, the magnetic field sensor receives the cyclical change of the magnetic induction intensity of the magnetic block, records the number of rotations of the turntable, and transmits an electrical signal to the cutting mechanism to control the cutting mechanism to cut the capillary tube. In this way, the circumferential length inside the slot is equal to the required cutting length, so there is no need to use visual or physical switch touch, which can achieve convenient and stable control of the cutting length, resulting in higher production efficiency.

[0009] Optionally: both sides of the slot opening are provided with guide surfaces along the circumferential direction, and the two guide surfaces are joined together in the direction toward the turntable axis.

[0010] By adopting the above technical solution, the guide surface guides the capillary needle line into the slot, which facilitates the installation of the capillary needle line when it passes through the straightening and cutting device.

[0011] Optionally: The metering mechanism, straightening mechanism and cutting mechanism are arranged in sequence. The straightening mechanism includes a feed hole for the capillary needle tube to enter. The axial projection of the feed hole falls into the slot and is tangent to the slot.

[0012] By adopting the above technical solution, the capillary needle tube is pulled out from the slot and passes through the feed hole along the axis of the feed hole, which reduces the squeezing and jamming between the capillary needle tube and the feed hole wall, making the rotation of the turntable driven by the capillary needle tube smoother, reducing the possibility of sliding friction between the capillary needle tube and the turntable, and thus improving the measurement accuracy of the metering mechanism.

[0013] Optional: The axis of the rotating shaft is vertical.

[0014] By adopting the above technical solution, the turntable is supported by the rotating shaft to overcome gravity, reducing the force required for the capillary needle line to drive the turntable, making the turntable rotate more smoothly when the capillary needle line is pulled, and improving the measurement accuracy of the measuring mechanism.

[0015] Optionally, it also includes a traction mechanism located between the straightening mechanism and the cutting mechanism. The traction mechanism includes a clamping roller assembly and a driving assembly for rotating the clamping roller assembly. The clamping roller assembly includes a first clamping roller and a second clamping roller. The first clamping roller and the second clamping roller respectively clamp the capillary tube on both sides and are pulled by the straightening mechanism towards the cutting mechanism.

[0016] By adopting the above technical solution, the traction mechanism actively pulls the capillary needle tube, and in conjunction with the turntable, keeps the capillary needle tube taut before and after passing through the straightening mechanism, thereby improving the measurement accuracy of the metering mechanism.

[0017] Optionally: Both the first and second clamping rollers are fitted with rubber roller sleeves for contacting the capillary needle tube.

[0018] By adopting the above technical solution, the rubber roller sleeve is soft and has high friction when it deforms and contacts the capillary needle tube, which avoids the capillary needle tube line being flattened, thereby improving the quality of the cut material. At the same time, it reduces the slippage of the capillary needle tube line and the clamping roller assembly, and improves the measurement accuracy of the metering mechanism.

[0019] Optionally, the traction mechanism further includes a first gear coaxially sleeved and fixed to the first clamping roller, and a second gear coaxially sleeved and fixed to the second clamping roller, wherein the first gear and the second gear have the same number of teeth and tooth pitch and mesh with each other.

[0020] By adopting the above technical solution, the circumferential rotation of the first clamping roller and the second clamping roller is synchronized, avoiding the deformation of the capillary tube caused by the circumferential rotation deviation of the first clamping roller and the second clamping roller, thereby improving the quality of the cut material.

[0021] Optionally, the traction mechanism further includes a pressure regulating component, which includes a pressure-applying elastic element that abuts against the first clamping roller in the direction of the second clamping roller.

[0022] By adopting the above technical solution, the clamping pressure of the first and second clamping rollers on the capillary needle tube is guaranteed, while preventing excessive clamping pressure from causing deformation of the capillary needle tube, thereby improving the quality of the cut material.

[0023] Optional: The traction mechanism includes a mounting frame with an adjusting threaded hole extending through it and facing the first clamping roller; the pressure adjusting assembly includes a pressure adjusting bolt extending through the adjusting threaded hole and threadedly connected to it; one end of the pressure applying elastic element abuts against the first clamping roller, and the other end abuts against the pressure adjusting bolt.

[0024] By adopting the above technical solution, the clamping pressure required by the clamping roller assembly for capillary needles of different diameters is different when pulling them. By screwing in the pressure adjusting bolt, the pressure applying elastic element is further compressed to increase the clamping pressure. By screwing out the pressure adjusting bolt, the compression of the pressure applying elastic element is reduced to decrease the clamping pressure. This achieves adaptive adjustment for capillary needles of different diameters and increases the applicability of the straightening and cutting device.

[0025] Optionally, the pressure adjusting bolt is threaded with two pressure adjusting nuts, which respectively abut against the two ends of the adjusting threaded hole.

[0026] By adopting the above technical solution, after the pressure adjusting bolt is adjusted, the pressure adjusting nut is rotated so that the two pressure adjusting nuts abut against the two ends of the adjusting threaded hole respectively. This can prevent the pressure adjusting bolt from loosening due to vibration during the production process, thereby maintaining the clamping pressure of the clamping roller assembly on the capillary needle tube and ensuring stable production.

[0027] In summary, this application has at least the following beneficial effects:

[0028] 1. The turntable is driven to rotate by the pull of the capillary tube. The pull distance of the capillary tube is equal to the circumferential rotation distance of the turntable. The magnetic field sensor records the number of rotations of the turntable and transmits an electrical signal to the cutting mechanism to control the cutting mechanism to cut the capillary tube. This achieves convenient and stable control of the cutting length without the need for visual or physical switch touch, resulting in higher production efficiency.

[0029] 2. A traction mechanism is added between the cutting mechanism and the straightening mechanism, in conjunction with the turntable, to keep the capillary needle tube taut before and after passing through the straightening mechanism, thereby improving the measurement accuracy of the measuring mechanism. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the straightening and cutting device;

[0031] Figure 2 Explosion of the measuring device Figure 1 ;

[0032] Figure 3 This is a cross-sectional view of the turntable;

[0033] Figure 4 Explosion of the measuring device Figure 2 ;

[0034] Figure 5 This is a schematic diagram of the straightening mechanism and the measuring mechanism;

[0035] Figure 6 An exploded view of the straightening mechanism;

[0036] Figure 7 A schematic diagram of the tensioning mechanism, straightening mechanism, and measuring mechanism;

[0037] Figure 8 An exploded view of the traction mechanism;

[0038] Figure 9 This is a schematic diagram of the cutting mechanism.

[0039] Reference numerals: 1. Frame; 2. Mounting platform; 3. Metering mechanism; 31. Mounting shaft; 32. Turntable; 321. Slot; 322. Guide surface; 323. Insertion groove; 33. Rotating shaft; 34. Metering component; 341. Magnetic block; 342. Magnetic field sensor; 4. Straightening mechanism; 41. Fixing frame; 411. Fixing hole; 42. Rotating bearing; 43. Straightening component; 431. Straightening frame; 432. Connecting shaft; 4321. Feed hole; 4322. Discharge hole; 434. Straightening component; 4341. Straightening head; 44. Rotating component; 441. Rotating motor; 442. Rotating belt; 443. Rotating drive wheel; 444. Rotating driven wheel; 5. Traction mechanism; 51. Mounting frame; 511. Base; 512. Mounting seat; 5121. Slide rail; 5122. Adjusting threaded hole; 52. Clamp Roller assembly; 521, First clamping roller; 522, Second clamping roller; 523, Slider; 524, First gear; 525, Second gear; 526, Rubber roller sleeve; 53, Pressure adjusting assembly; 531, Pressure applying elastic element; 532, Pressure adjusting bolt; 533, Pressure adjusting nut; 534, Pad; 54, Drive assembly; 541, Drive motor; 542, Drive driving wheel; 543, Drive driven wheel; 544, Drive belt; 6, Cutting mechanism; 61, Cutting block; 611, Threading hole; 62, Cutting blade; 621, Cutting end; 6211, Upper connecting rod; 622, Reset end; 6221, Upper reset rod; 63, Cutting shaft; 64, Lower reset rod; 65, Reset elastic element; 66, Cutting motion assembly; 661, Electromagnetic lifter; 662, Lifting block; 6621, Lower connecting rod; 663, Linkage rod. Detailed Implementation

[0040] The following description, in conjunction with the accompanying drawings, further illustrates this application.

[0041] As attached Figure 1 As shown, a straightening and cutting device for capillary needles includes a frame 1 with a horizontal mounting platform 2 fixed on the top of the frame 1.

[0042] The mounting platform 2 has a metering mechanism 3, a straightening mechanism 4, a traction mechanism 5, and a cutting mechanism 6 arranged sequentially along a straight line.

[0043] As attached Figure 2 As shown, the measuring mechanism 3 includes a mounting shaft 31 and a turntable 32. The mounting shaft 31 is vertical in axis and is fixed on the upper surface of the mounting platform 2.

[0044] A rotating shaft 33 is coaxially fixed to the upper end of the mounting shaft 31. The diameter of the rotating shaft 33 is smaller than that of the mounting shaft 31.

[0045] The turntable 32 is coaxially sleeved on the outside of the rotating shaft 33, the bottom of the turntable 32 presses against the upper end of the mounting shaft 31, and the turntable 32 is rotatably connected to the rotating shaft 33.

[0046] As attached Figure 3 As shown, a groove 321 is also provided on the outer circumference of the turntable 32. The groove 321 is an annular groove coaxial with the turntable 32.

[0047] Meanwhile, a guide surface 322 is also provided on the outer circumference of the turntable 32. There are two guide surfaces 322, which are annular surfaces coaxial with the slot 321, located on both sides of the slot opening of the slot 321, and the two guide surfaces 322 face each other and converge towards the slot 321. The guide surface 322 can be an inclined surface or a smooth curved surface; in this case, it is an inclined surface.

[0048] As attached Figure 4 As shown, the measuring mechanism 3 also includes a measuring component 34, which includes a magnetic block 341 and a magnetic field sensor 342.

[0049] The bottom surface of the turntable 32 has a groove 323, and the magnetic block 341 is embedded and fixed in the groove 323. The magnetic field sensor 342 is located below the turntable 32 and is fixed to the mounting shaft 31.

[0050] As attached Figure 2 and attached Figure 4 As shown, when the turntable 32 rotates, the magnetic block 341 rotates synchronously with the turntable 32, and the rotation path of the magnetic block 341 passes directly above the magnetic field sensor 342. The magnetic field strength is at its maximum when the magnetic block 341 passes directly above the magnetic field sensor 342, and the magnetic field strength decreases after the magnetic block 341 passes the magnetic field sensor 342. The magnetic field sensor 342 counts when it detects the magnetic field as it decreases from its peak value, and this number is the number of rotations of the turntable 32.

[0051] As attached Figure 5 and attached Figure 6 As shown, the straightening mechanism 4 includes two fixing brackets 41 fixed to the mounting platform 2, and the two fixing brackets 41 have fixing holes 411. The two fixing holes 411 are coaxial and horizontal, and a rotating bearing 42 is embedded in each of the two fixing holes 411.

[0052] A straightening assembly 43 is also installed between the two fixing brackets 41.

[0053] The straightening assembly 43 includes a straightening frame 431, the two long sides of which are parallel to the axial direction of the fixing hole 411. A connecting shaft 432 is fixed to the midpoint of each end of the straightening frame 431, the axial direction of which is parallel to the fixing hole 411. The two connecting shafts 432 are respectively inserted into two rotating bearings 42 and are connected to the rotating bearings 42.

[0054] The two connecting shafts 432 also have holes that pass through the connecting shafts 432 and the straightening frame 431. The hole closer to the turntable 32 is the feed hole 4321, and the hole farther from the turntable 32 is the discharge hole 4322. The feed hole 4321 and the discharge hole 4322 are coaxial and their height is flush with that of the slot 321. The diameter of the feed hole 4321 and the discharge hole 4322 is no greater than the width of the slot 321. The axes of the feed hole 4321 and the discharge hole 4322 extend into the slot 321 and are tangent to it.

[0055] Straightening components 434 are fixed at intervals on the two long sides of the straightening frame 431. One end of the straightening component 434 is inserted into the straightening frame 431 and a straightening head 4341 for abutting the capillary tube is fixed on that end.

[0056] As attached Figure 1 and attached Figure 5 As shown, the straightening mechanism 4 also includes a rotating assembly 44, which includes a rotating motor 441, a rotating belt 442, a rotating drive pulley 443, and a rotating driven pulley 444. The rotating motor 441 is fixed below the mounting platform 2, and its motor shaft is coaxially fixed with the rotating drive pulley 443. The rotating driven pulley 444 is coaxially fixed on a connecting shaft 432 and is located directly above the rotating drive pulley 443.

[0057] A window is provided on the mounting platform 2 in the area between the driven wheel 444 and the driving wheel 443. One end of the rotating belt 442 is sleeved on the driving wheel 443, and the other end is sleeved on the driven wheel 444. Therefore, when the rotating motor 441 is started, it can drive the driven wheel 444 and the straightening frame 431 to rotate.

[0058] As attached Figure 6 As shown, the capillary needle tube enters the straightening frame 431 through the feed hole 4321 and exits the straightening frame 431 through the discharge hole 4322. The rotation of the straightening frame 431 drives the straightening head 4341 to rotate and press against the capillary needle tube, thereby straightening the bent capillary needle tube.

[0059] As attached Figure 7 As shown, the traction mechanism 5 includes a mounting frame 51, a clamping roller assembly 52, and a pressure regulating assembly 53.

[0060] Mounting bracket 51 is located on the side of straightening mechanism 4 that is relatively far from metering mechanism 3. It includes base 511 and two mounting seats 512. Base 511 is fixed to mounting platform 2, and the two mounting seats 512 are distributed and fixed on both sides of base 511. The axis of discharge hole 4322 is located between the two mounting seats 512.

[0061] As attached Figure 7 and attached Figure 8As shown, vertical slides 5121 are opened on the facing surfaces of the two mounting bases 512, and the slides 5121 horizontally penetrate the opposite surfaces of the mounting bases 512.

[0062] The clamping roller assembly 52 includes a first clamping roller 521 and a second clamping roller 522. The first clamping roller 521 is horizontal in axis and perpendicular to the axis of the discharge hole 4322. Both ends of the first clamping roller 521 pass through two slide rails 5121. Slider blocks 523 are also fixed to both ends of the first clamping roller 521, and the sliders 523 are located within and slidably connected to the slide rails 5121. The second clamping roller 522 is located below the first clamping roller 521, parallel to the first clamping roller 521, and both ends of the second clamping roller 522 pass through the two slide rails 5121. Slider blocks 523 are also fixed to both ends of the second clamping roller 522, and the sliders 523 are located within and slidably connected to the slide rails 5121. Thus, the first clamping roller 521 and the second clamping roller 522 can slide towards each other or away from each other within the slide rails 5121.

[0063] A first gear 524 is coaxially fixed to the end of the first clamping roller 521 that extends out of the slide rail 5121, and a second gear 525 is coaxially fixed to the end of the second clamping roller 522 that extends out of the slide rail 5121. The first gear 524 and the second gear 525 have the same number of teeth and tooth pitch, and the first gear 524 and the second gear 525 mesh with each other, so that the second clamping roller 522 rotates synchronously with the first clamping roller 521 when the first clamping roller 521 rotates.

[0064] In addition, the first clamping roller 521 and the second clamping roller 522 are each fitted with a rubber roller sleeve 526 on their sides between the two mounting seats 512, and the axis of the discharge hole 4322 is located between the two rubber roller sleeves 526. The rubber roller sleeve 526 is used to clamp the capillary needle tube, and the rubber roller sleeve 526 is made of rubber or silicone rubber.

[0065] There are two pressure regulating components 53. Each pressure regulating component 53 includes a pressure applying elastic element 531, a pressure regulating bolt 532, a pad, and two pressure regulating nuts 533. The top of the mounting base 512 is located above the slide rail 5121 and has a vertically connected adjusting threaded hole 5122 that communicates with the slide rail 5121. The pressure regulating bolt 532 passes through the adjusting threaded hole 5122 from top to bottom and is threadedly connected to the adjusting threaded hole 5122.

[0066] Two adjusting nuts 533 are threaded onto the adjusting bolt 532, one located above the mounting base 512 and the other inside the slide rail 5121. The two adjusting nuts 533 respectively abut against the two ends of the adjusting threaded hole 5122 to fix the position of the adjusting bolt 532 and prevent the adjusting bolt 532 from moving due to vibration.

[0067] The lower end of the pressure adjusting bolt 532 is also fixed with a pad 534. The pressure applying elastic element 531 is located in the slide rail 5121, with one end abutting against the pad 534 and the other end abutting against and fixed to the slider 523 of the first clamping roller 521.

[0068] The pressure-applying elastic element 531 can be determined according to actual design requirements, and can be a rubber block, spring, etc. Here, the pressure-applying elastic element 531 is a spring. When the pressure-applying elastic element 531 is in a compressed state, its lower end abuts against the first clamping roller 521 in the direction of the second clamping roller 522.

[0069] As attached Figure 1 and attached Figure 7 As shown, the traction mechanism 5 also includes a drive assembly 54, which includes a drive motor 541, a drive drive wheel 542, a drive driven wheel 543, and a drive belt 544.

[0070] The driven wheel 543 is coaxially sleeved on one end of the second clamping roller 522. The drive motor 541 is installed below the mounting platform 2. The drive wheel 542 is located directly below the driven wheel 543 and is coaxially sleeved and fixed with the motor shaft of the drive motor 541.

[0071] Mounting platform 2 has a window in the area between the driven wheel 543 and the driving wheel 542. A drive belt 544 passes through the window, with one end connected to the driven wheel 543 and the other end connected to the driving wheel 542. This starts the drive motor 541, causing the first clamping roller 521 and the second clamping roller 522 to rotate in opposite directions, pulling the capillary tube between the two rubber roller sleeves 526 away from the straightening mechanism 4.

[0072] As attached Figure 1 and attached Figure 9 As shown, the cutting mechanism 6 is located on the side of the traction mechanism 5 that is relatively far away from the straightening mechanism 4, and it includes a cutting block 61, a cutter 62 and a cutting assembly 66.

[0073] As attached Figure 9 As shown, the cutting block 61 has a threading hole 611. The axis of the threading hole 611 coincides with the axis of the discharge hole 4322. After the capillary needle wire exits from the discharge hole 4322 of the straightening mechanism 4, it passes through the traction mechanism 5 and the threading hole 611 in sequence along the axial direction of the discharge hole 4322.

[0074] A cutting shaft 63 is fixed to the side of the cutting block 61 facing away from the traction mechanism 5, and the axial direction of the cutting shaft 63 is parallel to the discharge hole 4322. The cutter 62 is long and strip-shaped, and is rotatably connected to the cutting shaft 63.

[0075] One end of the cutter 62 is a cutting shaft 63, and the other end is a reset end 622. The cutting end 621 is higher than the thread hole 611. The cutting end 621 rotates downwards through the thread hole 611. If a capillary needle thread is passing through the thread hole 611, the cutter 62 will cut the capillary needle thread. At the same time, an upper connecting rod 6211 parallel to the thread hole 611 is fixed to the end of the cutting end 621.

[0076] An upper reset rod 6221 is fixed to the end of the reset end 622, and a lower reset rod 64 is fixed to the cutting block 61 below the cutting shaft 63. A reset elastic element 65 is connected between the upper reset rod 6221 and the lower reset rod 64. The reset elastic element 65 can be an elastic strip or a spring, etc.

[0077] The cutting assembly 66 includes an electromagnetic lifter 661, a lifting block 662, and a linkage rod 663. The electromagnetic lifter 661 has an electromagnet built in and is electrically connected to the magnetic field sensor 342. When the magnetic field sensor 342 transmits an electrical signal to the electromagnetic lifter 661, the electromagnet is briefly energized for 0.1 to 0.5 seconds.

[0078] The lifting block 662 is made of iron or iron-nickel alloy. Its lower end is inserted into the electromagnetic lifting device 661, and its upper end is fixed with a lower connecting rod 6621 with an axial parallel wire hole 611.

[0079] One end of the linkage rod 663 is sleeved on the lower connecting rod 6621 and rotatably connected thereto, while the other end of the linkage rod 663 is sleeved on the upper connecting rod 6211 and rotatably connected thereto.

[0080] Therefore, when the electromagnetic lifter 661 is not energized and the reset elastic element 65 returns to its balanced state, the reset end 622 approaches the lower reset rod 64, the cutting end 621 lifts up and drives the lifting block 662 to lift; when the electromagnetic lifter 661 is energized, the lifting block 662 is attracted and pulled down, causing the cutting end 621 to rotate downward and pass through the wire hole 611, the reset end 622 rotates upward and stretches the reset elastic element 65; when the electromagnetic lifter 661 is energized and then the reset elastic element 65 retracts, driving the lifting block 662 and the cutting end 621 to reset, waiting for the next cutting.

[0081] The usage process of this application:

[0082] In use, the capillary needle wire first passes through the slot 321, enters the straightening mechanism 4 through the feed hole 4321, exits the straightening mechanism 4 through the discharge hole 4322, then passes between the two rubber roller sleeves 526 and enters the traction mechanism 5, and finally passes through the threading hole 611 of the cutting mechanism 6. When the capillary needle wire is pulled by the traction mechanism 5, it will drive the turntable 32 to rotate. The pulling distance of the capillary needle wire is equal to the circumferential rotation distance of the turntable 32. When the turntable 32 rotates once, the magnetic field sensor 342 receives the cyclical change of the magnetic induction intensity of the magnetic block 341, records the number of rotations of the turntable 32, and transmits an electrical signal to the cutting mechanism 6 to control the cutting mechanism 6 to cut the capillary needle wire. In this way, the circumferential length inside the slot 321 is equal to the required cutting length, so there is no need to use visual or physical switch touch, which can realize convenient and stable control of the cutting length, and the production efficiency is higher.

[0083] This specific embodiment is merely an explanation of this application and is not intended to limit it. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of protection claimed in this application.

Claims

1. A straightening and cutting device for capillary tubing, comprising a straightening mechanism (4) and a cutting mechanism (6), characterized in that: The metering mechanism (3) comprises a rotating shaft (33), a rotating disc (32) and a metering assembly (34), the rotating disc (32) is coaxially connected to the rotating shaft (33), the circumferential side of the rotating disc (32) is coaxially provided with a clamping groove (321) for clamping the capillary needle tube line, the metering assembly (34) comprises a magnetic field sensor (342) and a magnetic block (341) fixed on the rotating disc (32), the magnetic field sensor (342) is electrically connected with the cutting mechanism (6), and the projection of the magnetic field sensor (342) in the axial direction of the rotating shaft (33) falls on the circular track of the magnetic block (341) rotating with the rotating disc (32).

2. A straightening and cutting device for capillary tubing lines according to claim 1, characterized in that: The two sides of the slot opening of the clamping groove (321) are provided with guide surfaces (322) in the circumferential direction, and the two guide surfaces (322) are folded towards the axis direction of the rotating disc (32).

3. A straightening and cutting device for capillary tubing according to claim 1, wherein: The metering mechanism (3), the straightening mechanism (4) and the cutting mechanism (6) are arranged in sequence, the straightening mechanism (4) comprises a feeding hole (4321) for the capillary needle tube line to enter, and the projection of the feeding hole (4321) in the axial direction falls into the clamping groove (321) and is tangent to the clamping groove (321).

4. A straightening and cutting device for capillary tubing according to claim 1 or 3, characterized in that: The rotating shaft (33) is vertically arranged in the axial direction.

5. A straightening and cutting device for capillary tubing according to claim 3, wherein: The traction mechanism (5) is located between the straightening mechanism (4) and the cutting mechanism (6), the traction mechanism (5) comprises a clamping roller assembly (52) and a driving assembly (54) for driving the clamping roller assembly (52) to rotate, the clamping roller assembly (52) comprises a first clamping roller (521) and a second clamping roller (522), the first clamping roller (521) and the second clamping roller (522) are respectively clamped on the two sides of the capillary needle tube line and rotate the capillary needle tube line from the straightening mechanism (4) to the cutting mechanism (6).

6. A straightening and cutting device for capillary tubing lines according to claim 5, characterized in that: The side surface of the first clamping roller (521) and the second clamping roller (522) is sleeved with a rubber roller sleeve (526) for contacting the capillary needle tube.

7. A straightening and cutting device for capillary tubing lines according to claim 5, characterized in that: The traction mechanism (5) further comprises a first gear (524) coaxially sleeved and fixed to the first clamping roller (521), a second gear (525) coaxially sleeved and fixed to the second clamping roller (522), the first gear (524) and the second gear (525) have equal number of teeth and equal pitch and are engaged with each other.

8. A straightening and cutting device for capillary tubing lines according to claim 5, characterized in that: The traction mechanism (5) further comprises a pressure adjusting assembly (53), the pressure adjusting assembly (53) comprises a pressure applying elastic member (531) abutting against the first clamping roller (521) in the direction of the second clamping roller (522).

9. A straightening and cutting device for capillary tubing according to claim 8, wherein: The traction mechanism (5) comprises a mounting frame (51), the mounting frame (51) is provided with an adjusting threaded hole (5122) penetrating towards the first clamping roller (521), the pressure adjusting assembly (53) comprises a pressure adjusting bolt (532), the pressure adjusting bolt (532) penetrates the adjusting threaded hole (5122) and is threadedly connected with the adjusting threaded hole (5122), one end of the pressure applying elastic member (531) abuts against the first clamping roller (521), and the other end abuts against the pressure adjusting bolt (532).

10. A straightening and cutting device for capillary tubing according to claim 9, wherein: Two pressure adjusting nuts (533) are threadedly connected on the pressure adjusting bolt (532), and the two pressure adjusting nuts (533) respectively abut against the two ends of the adjusting threaded hole (5122).

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