A laser trimming device for a rod-shaped resistor

Abstract

This utility model belongs to the field of laser trimming technology and discloses a laser trimming device for rod-shaped resistors. It includes a substrate, an X-axis linear module on top of the substrate, a rotating assembly connected above the X-axis module, and a laser marking assembly corresponding to the rotating assembly on the substrate. The rotating assembly includes a resistor clamp with a first slot and a clamping cylinder. A spring is sleeved on the telescopic rod of the clamping cylinder and connected to a second slot. The laser marking assembly includes a laser marking head with lamp arms on both sides. The lamp arms are parallel to the rotating assembly, and visual illumination lights are symmetrically arranged below the lamp arms. This utility model has a simple structure and is easy to use. It is suitable for processing rod-shaped resistors of various lengths. By setting visual illumination lights, it overcomes the influence of ambient light on processing accuracy. The use of clamping cylinders improves clamping efficiency, clamping effect, and the automation level of the equipment.

Description

Technical Field

[0001] This utility model belongs to the field of laser trimming technology, specifically relating to a laser trimming device for a rod-shaped resistor. Background Technology

[0002] With the increasing precision of electronic components, the requirements for the accuracy of rod resistors are becoming more and more stringent. Laser trimming technology, due to its high precision and high efficiency, has become a key process for trimming rod resistors. This technology uses a laser beam to precisely cut the resistor body, change its conductive path, and thus adjust the resistance value to the target range.

[0003] In the prior art, there are various laser trimming devices. For example, the utility model patent "A Laser Trimming Device and Its Rotary Positioning Mechanism" with application number 2022230877987 discloses a rotary positioning mechanism that includes a base plate, a rotary drive source, a first support, and a second support. The rotary drive source synchronously drives the two supports to rotate through a rotating shaft and a belt drive assembly to ensure the coaxiality of the resistor rotation. The product is clamped and positioned by a first flipping pressure rod and a second flipping pressure rod. This clamping method relies on manual operation and has a low degree of automation. At the same time, in working conditions with insufficient light or large changes in ambient light, the precise positioning of the operator placing the resistor and the system identifying the resistor position may be interfered with, which poses a risk of affecting the initial processing positioning accuracy and ultimately affecting the processing accuracy of the final product.

[0004] In summary, there is an urgent need for a laser trimming device for rod resistors that can overcome insufficient light or large changes in ambient light, and that is more automated and easier to use. Utility Model Content

[0005] In order to solve the above-mentioned technical problems, this utility model provides a laser trimming device for rod-shaped resistors, which is convenient to use, has a higher degree of automation, and overcomes the influence of insufficient light or large changes in ambient light.

[0006] The technical solution adopted by this utility model is as follows: a laser trimming device for a rod-shaped resistor, including a substrate, an X-axis linear module on the top of the substrate, a rotating assembly connected above the X-axis linear module, a laser marking assembly on the substrate corresponding to the rotating assembly, the rotating assembly including a base plate on the X-axis linear module, a first support and a second support opposite to each other on the left and middle of the base plate, a fixed plate on the right end of the base plate, a first synchronization assembly and a second synchronization assembly respectively on the outer sides of the first support and the second support, the first synchronization assembly being connected to a stepper motor at the bottom of the first support, the first synchronization assembly being connected to the left end of a synchronization shaft, the second support and the second synchronization assembly being connected in the middle of the synchronization shaft via a sliding sleeve, the right end of the synchronization shaft being rotatably connected to the fixed plate, the first support and the fixed plate being fixedly connected to both ends of a support shaft, the support shaft passing through the second support and being slidably connected to the second support, the second support being connected to the support shaft. A locking sleeve is provided at the first support shaft and fixedly connected to the second support. A resistor clamp is provided inside the first and second supports. The first and second synchronization components pass through the first and second supports respectively, connecting the two ends of the resistor clamp and driving the two ends of the resistor clamp to rotate synchronously. The resistor clamp includes a first slot connected to the first synchronization component and a clamping cylinder connected to the second synchronization component. A spring is sleeved on the telescopic rod of the clamping cylinder and connected to the second slot. A copper cap is provided at the connection between the first and second slots and the rod-shaped resistor end cap. The copper cap is connected to the resistance detection equipment. The laser marking component includes a Z-axis linear module, which is vertically connected to the Y-axis linear module. A laser marking head is provided at one end of the Y-axis module corresponding to the rotating component. Lamp arms are provided on the left and right sides of the laser marking head. The lamp arms are arranged parallel to the rotating component. Visual illumination lights are symmetrically provided below the lamp arms.

[0007] The X-axis linear module is fixedly mounted on one side of the upper surface of the substrate. The X-axis linear module includes a linear slide rail fixedly mounted on the substrate. One end of the linear slide rail is connected to a servo motor, and a slider is connected above the linear slide rail. The servo motor drives the slider to move on the linear slide rail through a transmission mechanism. A base plate is fixedly connected above the slider.

[0008] The first and second card slots are semi-circular, with an arc-shaped groove in the middle.

[0009] The first synchronization component includes a small transmission wheel connected to the output end of a stepper motor. A first transmission wheel and a second transmission wheel are located on the left and right sides above the small transmission wheel. The small transmission wheel, the first transmission wheel, and the second transmission wheel are connected by a synchronous belt. A tension sensor is located in the middle of the small transmission wheel, the first transmission wheel, and the second transmission wheel. The tension sensor is fixedly mounted on a first support. The first transmission wheel is fixedly connected to a synchronous shaft, which is connected to the first support via a first belt bearing. The second transmission wheel is fixedly connected to a first slot of a resistor clamp via a first connecting shaft, which is connected to the first support via a second belt bearing. A groove is provided in the middle of the bottom of the first support, and the stepper motor is mounted in the groove and connected to the small transmission shaft.

[0010] The second synchronization component includes a first driven pulley and a second driven pulley connected by a timing belt. An auxiliary pulley is located at the middle position below the first and second driven pulleys. The top of the auxiliary pulley is connected to the timing belt. The first driven pulley is correspondingly arranged with the first transmission pulley, and the second driven pulley is correspondingly arranged with the second transmission pulley. A third belt bearing is located on the second support at a position corresponding to the first driven pulley. The synchronization shaft is connected to the third belt bearing and the first driven pulley through a sliding sleeve. One end of the second driven pulley is fixedly connected to the second connecting shaft, and the other end of the second connecting shaft is fixedly connected to a clamping cylinder. The second connecting shaft passes through the second support and is rotatably connected to the second support through a fourth belt bearing.

[0011] There are two support shafts, which are connected to the first support, the second support, and the two sides of the bottom of the fixed plate, respectively.

[0012] A retaining ring for the shaft is fitted in the middle of the support shaft near the first support.

[0013] A limit block is provided on the base plate, and the limit block is located between the fixed plate and the second support near the fixed plate.

[0014] The first and second supports are provided with protective shells, and the first and second synchronization components are located inside the protective shells.

[0015] The beneficial effects of this utility model are as follows: This utility model has a simple structure and is easy to use. It is suitable for processing rod-shaped resistors of various lengths and sizes. By setting up a visual lighting lamp, it overcomes the influence of ambient light on processing accuracy. The use of a clamping cylinder improves clamping efficiency, clamping effect, and the degree of automation of the equipment. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a rear view structural diagram of the X-axis linear module and rotating component of this utility model; Figure 3This is a schematic diagram of the structure of the rotating component of this utility model; Figure 4 This is a schematic diagram of the structure of the first synchronization component of this utility model; Figure 5 This is a schematic diagram of the structure of the second synchronization component of this utility model.

[0017] In the diagram, the markings are: 1. Base plate; 2. X-axis linear module; 21. Linear guide rail; 22. Servo motor; 23. Slider; 3. Rotating assembly; 31. Base plate; 311. Limiting block; 32. First support; 321. First synchronization assembly; 3211. Small transmission wheel; 3212. First transmission wheel; 3213. Second transmission wheel; 3214. First bearing with mounting; 3215. Second bearing with mounting; 3216. First connecting shaft; 3217. Tension sensor; 33. Second support; 331. Second synchronization assembly; 3311. First driven wheel; 331... 2. Second driven wheel; 3313. Third bearing with seat; 3314. Fourth bearing with seat; 3315. Auxiliary wheel; 3316. Second connecting shaft; 332. Locking sleeve; 34. Fixing plate; 35. Stepper motor; 36. Synchronous shaft; 37. Support shaft; 38. Resistor clamp; 381. First slot; 382. Second slot; 383. Clamping cylinder; 39. Shaft retaining ring; 4. Laser marking assembly; 41. Z-axis linear module; 42. Y-axis linear module; 43. Laser marking head; 44. Lamp arm; 45. Visual illumination lamp; 5. Rod resistor. Detailed Implementation

[0018] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings.

[0019] like Figure 1-5As shown, a laser trimming device for a rod-shaped resistor includes a substrate 1. An X-axis linear module 2 is disposed on the upper surface of the substrate 1. The X-axis linear module 2 is fixedly disposed on one side of the upper surface of the substrate 1. The X-axis linear module 2 includes a linear slide rail 21 fixedly disposed on the substrate 1. One end of the linear slide rail 21 is connected to a servo motor 22. A slider 23 is connected above the linear slide rail 21. The servo motor 22 drives the slider 23 to move on the linear slide rail 21 through a transmission mechanism. A rotating assembly 3 is fixedly connected above the slider 23. The rotating assembly 3 includes a base plate disposed on the X-axis linear module 2. 31. A first support 32 and a second support 33 are respectively arranged opposite each other on the left and middle sides of the base plate 31. A fixing plate 34 is provided on the right side of the base plate 31. A resistor clamp 38 is provided inside the first support 32 and the second support 33. The resistor clamp 38 includes a first slot 381 and a clamping cylinder 383. A spring is sleeved on the telescopic rod of the clamping cylinder 383 and connected to the second slot 382. The first slot 381 and the second slot 382 are semi-circular with an arc-shaped groove in the middle. A copper cap is provided at the connection between the first slot 381 and the second slot 382 and the rod-shaped resistor end cap. Connected to a resistance detection device; a first synchronization component 321 and a second synchronization component 331 are respectively provided on the outer sides of the first support 32 and the second support 33. The first synchronization component 321 includes a small transmission wheel 3211, and a first transmission wheel 3212 and a second transmission wheel 3213 are provided on the left and right sides above the small transmission wheel 3211. The small transmission wheel 3211, the first transmission wheel 3212 and the second transmission wheel 3213 are connected by a timing belt. A tension sensor 3217 is provided in the middle of the small transmission wheel 3211, the first transmission wheel 3212 and the second transmission wheel 3213. Tension sensor 3217 is fixedly mounted on first support 32. First transmission wheel 3212 is fixedly connected to synchronous shaft 36. The left end of synchronous shaft 36 is connected to first support 32 via first bearing 3214. Second transmission wheel 3213 is fixedly connected to first slot 381 of resistor clamp 38 via first connecting shaft 3216. First connecting shaft 3216 is connected to first support 32 via second bearing 3215. A groove is provided in the middle of the bottom of first support 32. Stepper motor 35 is provided in the groove and connected to small transmission shaft.The second synchronization assembly 331 includes a first driven pulley 3311 and a second driven pulley 3312 connected by a timing belt. An auxiliary pulley 3315 is located at the lower center of the first driven pulley 3311 and the second driven pulley 3312. The top of the auxiliary pulley 3315 is connected to the timing belt. The first driven pulley 3311 is correspondingly arranged with the first transmission pulley 3212, and the second driven pulley 3312 is correspondingly arranged with the second transmission pulley 3213. A third belt bearing 3313 is located on the second support 33 at a position corresponding to the first driven pulley 3311. The timing shaft 36 contains... The first support 32, the second support 33, and the first driven wheel 3311 are connected by a sliding sleeve to the third bearing 3313 and the first driven wheel 3311. The right end of the synchronous shaft 36 is rotatably connected to the fixed plate 34. The second driven wheel 3312 is fixedly connected to one end of the second connecting shaft 3316, and the other end of the second connecting shaft 3316 is fixedly connected to the clamping cylinder 383. The second connecting shaft 3316 passes through the second support 33 and is rotatably connected to the second support 33 through the fourth bearing 3314. Support shafts 37 are connected to both sides of the bottom of the first support 32, the second support 33, and the fixed plate 34. 2. The two ends of the support shaft 37 are fixedly connected to the fixing plate 34. The support shaft 37 passes through the second support 33 and is slidably connected to the second support 33. A shaft retaining ring 39 is sleeved on the middle of the support shaft 37 near the first support 32. A locking sleeve 332 is provided at the connection between the second support 33 and the support shaft 37. The locking sleeve 332 is sleeved on the support shaft 37 and fixedly connected to the second support 33. A limit block 311 is provided on the base plate 31. The limit block 311 is located between the fixing plate 34 and the second support 33 near the fixing plate 34. The first support 32 and the second support 33 are fixedly connected to the second support 33. The two supports 33 are equipped with a protective shell, and the first synchronization component 321 and the second synchronization component 331 are located inside the protective shell. A laser marking component 4 is provided on the base plate 1 corresponding to the rotating component 3. The laser marking component 4 includes a Z-axis linear module 41, which is vertically connected to a Y-axis linear module 42. A laser marking head 43 is provided at one end of the Y-axis module 42 corresponding to the rotating component 3. Lamp arms 44 are provided on both sides of the laser marking head 43, and are arranged parallel to the rotating component 3. Visual illumination lamps 45 are symmetrically provided below the lamp arms 44.

[0020] When using this type of rod-shaped resistor with a laser trimming device, the leads at both ends of the rod-shaped resistor are placed into the first slot 381 and the second slot 382. A clamping cylinder 383 pushes the second slot 382 to clamp the rod-shaped resistor. A visual illumination lamp 45 is turned on, and a stepper motor 35 drives a first synchronization component 321. The first synchronization component 321 drives a second synchronization component 331 via a synchronization shaft 36. The first and second synchronization components 321 and 331 drive the first and second slots 381 and 382 to rotate synchronously. The laser marking head 43 begins to trim the rod-shaped resistor. A testing device detects the rod-shaped resistor through the copper caps on the first and second slots 381 and 382. After trimming is complete, the clamping cylinder 383 retracts the second slot 382. The worker removes the rod-shaped resistor. When processing rod-shaped resistors of different lengths, the locking sleeve 332 is opened to adjust the position of the second support 33 on the support shaft 37. After adjustment, the locking sleeve 332 is closed. When adjusting the second support 33, the minimum distance between the first support 32 and the second support 33 is determined by the shaft retaining ring 39, and the maximum distance between the first support 32 and the second support 33 is determined by the limit block 311. This utility model has a simple structure and is easy to use. It is suitable for processing rod-shaped resistors of various lengths. The visual illumination lamp 45 overcomes the influence of ambient light on processing accuracy. The clamping cylinder 383 improves clamping efficiency, clamping effect and automation of the equipment.

Claims

1. A laser trimming device for a rod-shaped resistor, comprising a substrate, an X-axis linear module disposed above the substrate, a rotating assembly connected above the X-axis linear module, and a laser marking assembly disposed on the substrate corresponding to the rotating assembly, characterized in that: The rotating assembly includes a base plate mounted on an X-axis linear module. A first support and a second support are positioned opposite each other at the left end and middle of the base plate. A fixing plate is located at the right end of the base plate. A first synchronization component and a second synchronization component are respectively mounted on the outer sides of the first and second supports. The first synchronization component is connected to a stepper motor at the bottom of the first support and to the left end of a synchronization shaft. The second support and the second synchronization component are connected in the middle of the synchronization shaft via a sliding sleeve. The right end of the synchronization shaft is rotatably connected to the fixing plate. The first support and the fixing plate are fixedly connected to both ends of a support shaft. The support shaft passes through the second support and is slidably connected to it. A locking sleeve is provided at the connection between the second support and the support shaft, and the locking sleeve is fitted onto the support shaft and fixedly connected to the second support. The inner sides of the first and second supports are provided with… The resistor clamp has a first synchronization component and a second synchronization component that pass through the first and second supports respectively, connecting the two ends of the resistor clamp and driving the two ends of the resistor clamp to rotate synchronously. The resistor clamp includes a first slot connected to the first synchronization component and a clamping cylinder connected to the second synchronization component. A spring is sleeved on the telescopic rod of the clamping cylinder and connected to the second slot. A copper cap is provided at the connection between the first and second slots and the rod-shaped resistor end cap. The copper cap is connected to the resistance detection equipment. The laser marking component includes a Z-axis linear module, which is vertically connected to a Y-axis linear module. A laser marking head is provided at one end of the Y-axis module corresponding to the rotating component. Lamp arms are provided on the left and right sides of the laser marking head. The lamp arms are arranged parallel to the rotating component. Visual illumination lights are symmetrically provided below the lamp arms.

2. The laser trimming device for rod-shaped resistors according to claim 1, characterized in that: The X-axis linear module is fixedly mounted on one side of the upper surface of the substrate. The X-axis linear module includes a linear slide rail fixedly mounted on the substrate. One end of the linear slide rail is connected to a servo motor, and a slider is connected above the linear slide rail. The servo motor drives the slider to move on the linear slide rail through a transmission mechanism. A base plate is fixedly connected above the slider.

3. The laser trimming device for rod-shaped resistors according to claim 2, characterized in that: The first and second card slots are semi-circular, with an arc-shaped groove in the middle.

4. The laser trimming device for rod-shaped resistors according to claim 3, characterized in that: The first synchronization component includes a small transmission wheel connected to the output end of a stepper motor. A first transmission wheel and a second transmission wheel are located on the left and right sides above the small transmission wheel. The small transmission wheel, the first transmission wheel, and the second transmission wheel are connected by a synchronous belt. A tension sensor is located in the middle of the small transmission wheel, the first transmission wheel, and the second transmission wheel. The tension sensor is fixedly mounted on a first support. The first transmission wheel is fixedly connected to a synchronous shaft, which is connected to the first support via a first belt bearing. The second transmission wheel is fixedly connected to a first slot of a resistor clamp via a first connecting shaft, which is connected to the first support via a second belt bearing. A groove is provided in the middle of the bottom of the first support, and the stepper motor is mounted in the groove and connected to the small transmission shaft.

5. The laser trimming device for rod-shaped resistors according to claim 4, characterized in that: The second synchronization component includes a first driven pulley and a second driven pulley connected by a timing belt. An auxiliary pulley is located at the middle position below the first and second driven pulleys. The top of the auxiliary pulley is connected to the timing belt. The first driven pulley is correspondingly arranged with the first transmission pulley, and the second driven pulley is correspondingly arranged with the second transmission pulley. A third belt bearing is located on the second support at a position corresponding to the first driven pulley. The synchronization shaft is connected to the third belt bearing and the first driven pulley through a sliding sleeve. One end of the second driven pulley is fixedly connected to the second connecting shaft, and the other end of the second connecting shaft is fixedly connected to a clamping cylinder. The second connecting shaft passes through the second support and is rotatably connected to the second support through a fourth belt bearing.

6. The laser trimming device for rod-shaped resistors according to claim 5, characterized in that: There are two support shafts, which are connected to the first support, the second support, and the two sides of the bottom of the fixed plate, respectively.

7. The laser trimming device for rod-shaped resistors according to claim 6, characterized in that: A retaining ring for the shaft is fitted in the middle of the support shaft near the first support.

8. The laser trimming device for rod-shaped resistors according to claim 6, characterized in that: A limit block is provided on the base plate, and the limit block is located between the fixed plate and the second support near the fixed plate.

9. The laser trimming device for rod-shaped resistors according to claim 1, characterized in that: The first and second supports are provided with protective shells, and the first and second synchronization components are located inside the protective shells.

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