Laser welding equipment for crystal oscillator

Abstract

The utility model relates to laser welding equipment for crystal oscillators, which comprises a rack, a welding station is arranged on the rack, a conveying device is arranged on the rack, the conveying device is used for conveying a welding jig for bearing the crystal oscillators to the welding station, a positioning part for limiting the movement of the welding jig is arranged at the welding station of the rack, and the positioning part is used for positioning the crystal oscillators. And lasers used for conducting laser welding on the crystal oscillators in the welding jigs are arranged on the portions, on the two sides of the welding station, of the rack. According to the laser welding mode, compared with a traditional electric heating pipe heating welding mode, the laser device works only when the crystal oscillator reaches the welding station, the laser device does not need to be in a starting state all the time, and therefore energy loss is reduced to a certain degree.

Description

Technical Field

[0001] This application relates to the technical field of laser welding, and in particular to a laser welding device for crystal oscillators. Background Technology

[0002] Crystal oscillators, also known as quartz crystal resonators, are commonly used in watches, mobile phones, tablets, microcomputers, calculators, home appliance automatic control, and industrial automatic control. Crystal oscillators are very important components in electronic products. During the operation of a crystal oscillator, the crystal vibrates to generate an oscillation circuit. The crystal, which converts electrical energy and mechanical energy into each other, works in a resonant state to provide stable and accurate single-frequency oscillation.

[0003] Currently, Chinese patent application number 2007201280433 discloses a tuning fork type quartz crystal resonator. Leads, glass beads, and Kovar rings constitute the base of the quartz crystal resonator. One end of the lead on the base is welded to the tuning fork electrode, which is the tuning fork connection end. The other end of the lead on the base extends to the outside of the housing, which is the circuit connection end. The tuning fork connection end of the base is coated with silver-tin flux, and then the tuning fork connection end of the base is welded to the tuning fork electrode.

[0004] Currently, the welding method between the tuning fork connector and the tuning fork electrode is mostly to use a heating tube to bake the metal, thereby melting the silver-tin flux and fixing the tuning fork connector to the tuning fork electrode. However, the heating tube baking method requires the heating tube to be in a constantly open state, which consumes a lot of energy, so there is room for improvement. Utility Model Content

[0005] To reduce energy consumption, this application provides a laser welding device for crystal oscillators.

[0006] The laser welding equipment for crystal oscillators provided in this application adopts the following technical solution:

[0007] A laser welding device for crystal oscillators includes a frame with a welding station and a conveying device for conveying a welding fixture carrying the crystal oscillator to the welding station. The frame has a positioning part at the welding station to restrict the movement of the welding fixture. The frame has lasers on both sides of the welding station for laser welding the crystal oscillator in the welding fixture.

[0008] Preferably, the frame is provided with a support, and the support is provided with a crossbeam placed horizontally above the conveying device. Mounting brackets are fixed on both sides of the crossbeam, and the laser is fixedly mounted on the mounting brackets with the laser head facing the welding station.

[0009] Preferably, the conveying device includes a conveying mounting frame and conveying wheels rotatably mounted at both ends of the conveying mounting frame. A conveyor belt is connected end to end between the two conveying wheels. A conveying motor for connecting to the conveying wheels is provided on the conveying mounting frame. A conveying clamping plate is provided on the conveying mounting frame. A conveying gap is provided on the conveying clamping plate along the conveying direction of the conveyor belt. The conveying gap is adapted to fit the welding fixture.

[0010] Preferably, the positioning part includes a positioning cylinder, and a positioning rod is provided on the output rod of the positioning cylinder. The positioning rod is horizontally positioned in the conveying device under the drive of the positioning cylinder.

[0011] Preferably, the frame is provided with a support frame at the welding station, and a first detection sensor and a second detection sensor are provided on the support frame. The first detection sensor and the second detection sensor are respectively located on both sides of the positioning rod. The first detection sensor is used to control the operation of the laser, and the second detection sensor is used to control the operation of the positioning cylinder.

[0012] Preferably, the support frame includes a support section and a mounting section. The support section is disposed on the frame, and the mounting section extends above the conveying device. The horizontal height of the mounting section is higher than the upper surface of the welding fixture. The first detection sensor and the second detection sensor are disposed on the mounting section.

[0013] Preferably, the first detection sensor and the second detection sensor are proximity switches.

[0014] Preferably, a blocking cylinder is provided on the frame, the blocking cylinder is located on the front side of the conveying direction of the welding station, a blocking rod is connected to the output rod of the blocking cylinder, the blocking rod extends into the conveying device under the drive of the blocking cylinder, and the blocking cylinder is controlled by the second detection sensor.

[0015] In summary, this application includes at least one of the following beneficial technical effects:

[0016] This application places the crystal oscillator in a welding fixture, which is then transported to the welding station by a conveying device. A laser is used to perform laser welding on the location of the crystal oscillator on the welding fixture, thereby completing the welding of the crystal oscillator. Compared with the traditional electric heating tube welding method, the laser only works when the crystal oscillator arrives at the welding station and does not need to be in a continuous state, thus reducing energy consumption to a certain extent. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a laser welding equipment.

[0018] Figure 2 This is a schematic diagram of the installation of the welding fixture on the conveying device.

[0019] Figure 3 This is a schematic diagram of the first installation of the positioning part on the conveying device.

[0020] Figure 4 This is a second installation diagram of the positioning part on the conveying device.

[0021] Explanation of reference numerals in the attached drawings: 1. Frame; 2. Conveying device; 21. Conveying mounting frame; 22. Conveying belt; 23. Conveying motor; 24. Conveying clamping plate; 25. Conveying gap; 3. Welding fixture; 31. Upper fixture; 32. Lower fixture; 33. Welding space; 4. Positioning part; 41. Positioning cylinder; 42. Positioning rod; 5. Laser; 6. Bracket; 7. Crossbeam; 8. Mounting frame; 9. Support frame; 91. Support section; 92. Mounting section; 10. First detection sensor; 11. Second detection sensor; 12. Blocking cylinder; 13. Blocking rod. Detailed Implementation

[0022] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0023] A laser welding device for crystal oscillators, referenced Figure 1 As shown, the device includes a frame 1, a welding station on the frame 1, a conveying device 2 on the frame 1, the conveying device 2 is used to convey the welding fixture 3 carrying the crystal oscillator to the welding station, the frame 1 is provided with a positioning part 4 at the welding station to restrict the movement of the welding fixture 3, and lasers 5 are provided on both sides of the frame 1 for laser welding of the crystal oscillator in the welding fixture 3.

[0024] Reference Figure 1 and Figure 2 As shown, the welding fixture 3 includes an upper fixture 31 and a lower fixture 32. The upper fixture 31 is used to mount the tuning fork of the crystal oscillator, and the lower fixture 32 is used to mount the base of the crystal oscillator. The base is coated with silver-tin flux. A welding space 33 is formed between the upper fixture 31 and the lower fixture 32. The welding fixture 3 can align the position of the tuning fork and the base, so that the tuning fork comes into contact with the silver-tin flux on the base. When the welding fixture 3 is transported to the welding station, the laser 5 can heat and melt the silver-tin flux with laser, thereby welding the tuning fork and the base together.

[0025] The conveying device 2 is used to convey the welding fixture 3 to the welding station. The conveying device 2 includes a conveying mounting frame 21 and conveying wheels that are rotatably installed at both ends of the conveying mounting frame 21. A conveyor belt 22 connected end to end is provided between the two conveying wheels. A conveying motor 23 is provided on the conveying mounting frame 21 for connecting with the conveying wheels. The conveying motor 23 is connected to one of the conveying wheels. The conveying motor 23 drives the conveying wheel to rotate, and then the conveying wheel can drive the conveyor belt 22 to move.

[0026] Reference Figure 2 and Figure 3 As shown, a conveyor clamping plate 24 is provided on the conveyor mounting frame 21. A conveyor gap 25 is provided on the conveyor clamping plate 24 along the conveying direction of the conveyor belt 22. The conveyor gap 25 is used to adapt to the welding fixture 3. The welding fixture 3 is clamped in the conveyor gap 25. The bottom of the welding fixture 3 is in contact with the conveyor belt 22. Thus, the conveyor belt 22 can drive the welding fixture 3 to move along the conveyor gap 25 until the welding fixture 3 is moved to the welding station and blocked and positioned by the positioning part 4.

[0027] Reference Figure 1 As shown, the laser 5 is used to weld crystal oscillators. The frame 1 is equipped with a support 6, and the support 6 is equipped with a crossbeam 7 that is placed horizontally above the conveyor 2. Mounting brackets 8 are fixed on both sides of the crossbeam 7. The laser 5 is fixedly mounted on the mounting brackets 8. There are two lasers 5. The laser head of the laser 5 faces the welding station, so that the lasers 5 on both sides of the welding station can simultaneously perform laser welding on the crystal oscillators.

[0028] Specifically, welding fixture 3 contains multiple crystal oscillators, spaced apart from each other. Each crystal oscillator has a tuning fork and a base assembled together. Laser 5 is used to heat and melt the silver-tin flux at the connection between the tuning fork and the base, completing the laser welding of the crystal oscillators. Thus, by setting the scanning path of laser 5 in the host computer and controlling the laser beam scanning path through the galvanometer within laser 5, laser 5 can spot-fire onto each crystal oscillator, thereby achieving laser welding of the crystal oscillators.

[0029] During the laser welding process, the crystal oscillator needs to be kept in the position of the welding fixture 3 so that it cannot move. This application uses the positioning part 4 to prevent the welding fixture 3 from moving in the conveying device 2.

[0030] Reference Figure 3 and Figure 4 As shown, the positioning part 4 includes a positioning cylinder 41, and a positioning rod 42 is provided on the output rod of the positioning cylinder 41. The positioning rod 42 is horizontally placed in the conveying device 2 under the drive of the positioning cylinder 41. The positioning rod 42 is horizontally placed above the conveyor belt 22 of the conveying device 2. The positioning rod 42 can block the welding fixture 3, so that the welding fixture 3 does not move with the conveyor belt 22.

[0031] The frame 1 is equipped with a support frame 9 at the welding station. The support frame 9 is equipped with a first detection sensor 10 and a second detection sensor 11. The first detection sensor 10 and the second detection sensor 11 are located on both sides of the positioning rod 42. Specifically, the support frame 9 includes a support section 91 and a mounting section 92. The support section 91 is set on the frame 1, and the mounting section 92 extends above the conveying device 2. The horizontal height of the mounting section 92 is higher than the upper surface of the welding fixture 3. The first detection sensor 10 and the second detection sensor 11 are set on the mounting section 92.

[0032] The conveyor belt 22 has a front side for conveying into the welding station and a rear side for conveying out of the welding station. A first detection sensor 10 is located on the front side and a second detection sensor 11 is located on the rear side. The first detection sensor 10 is used to control the operation of the laser 5 and the second detection sensor 11 is used to control the operation of the positioning cylinder 41.

[0033] It is worth noting that a blocking cylinder 12 is installed on the frame 1. The blocking cylinder 12 is located on the front side of the conveying direction of the welding station. A blocking rod 13 is connected to the output rod of the blocking cylinder 12. The blocking rod 13 extends into the conveying device 2 under the drive of the blocking cylinder 12. The blocking cylinder 12 is controlled by the second detection sensor 11.

[0034] In one embodiment, the first detection sensor 10 and the second detection sensor 11 are proximity switches. The proximity switches can be capacitive or inductive, depending on actual needs. The first detection sensor 10 and the second detection sensor 11 can be other sensors that can sense the position of objects, but this embodiment does not specify a particular setting.

[0035] The laser welding equipment in this application has a host computer. All electrical control components in the laser welding equipment are electrically connected to and controlled by the host computer, which performs overall control.

[0036] In the initial state, neither the first detection sensor 10 nor the second detection sensor 11 detects the welding fixture 3. The positioning cylinder 41 drives the positioning rod 42 to be placed horizontally in the conveying device 2, and the blocking cylinder 12 does not drive the blocking rod 13 to be placed horizontally in the conveying device 2. The conveying device 2 transports the welding fixture 3 to the welding station and is blocked by the positioning rod 42. At this time, the first detection sensor 10 senses the welding fixture 3 and outputs a signal to the host computer. The host computer controls the blocking cylinder 12 to move and place the blocking rod 13 horizontally in the conveying device 2 to prevent the subsequent welding fixture 3 from being transported to the welding station.

[0037] Furthermore, the first detection sensor 10 outputs a signal to the host computer, which controls the laser 5 to start. The laser 5 performs laser welding on the crystal oscillator in the welding station. After the laser 5 completes the laser path scanning, that is, after the laser 5 completes the laser welding of the welding fixture 3, the host computer controls the positioning cylinder 41 to move. The positioning cylinder 41 will drive the positioning rod 42 to not be placed horizontally in the conveying device 2, and the conveying device 2 will transport the welding fixture 3 out of the welding station.

[0038] At this time, the second detection sensor 11 detects the welding fixture 3. After the welding fixture 3 is completely transported away, the second detection sensor 11 outputs a signal to the host computer. The host computer controls the positioning cylinder 41 to move, and the positioning rod 42 is placed horizontally in the conveying device 2. The host computer controls the blocking cylinder 12 to move, and the blocking rod 13 is not placed horizontally in the conveying device 2, so that the subsequent welding fixture 3 is transported to the welding station through the conveying device 2. The welding fixture 3 is blocked by the positioning rod 42 and detected by the first detection sensor 10. The above actions are repeated in a cycle to realize the streamlined laser welding process of the crystal oscillator in the welding fixture 3.

[0039] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A laser welding device for crystal oscillators, comprising a frame (1), characterized in that, The frame (1) is provided with a welding station and a conveying device (2). The conveying device (2) is used to convey the welding fixture (3) carrying the crystal oscillator to the welding station. The frame (1) is provided with a positioning part (4) at the welding station to restrict the movement of the welding fixture (3). The frame (1) is provided with lasers (5) on both sides of the welding station for laser welding the crystal oscillator in the welding fixture (3).

2. The laser welding equipment for crystal oscillators according to claim 1, characterized in that, A bracket (6) is provided on the frame (1), and a crossbeam (7) is provided on the bracket (6) above the conveying device (2). Mounting brackets (8) are fixed on both sides of the crossbeam (7), and the laser (5) is fixed on the mounting bracket (8). The laser head of the laser (5) faces the welding station.

3. The laser welding equipment for crystal oscillators according to claim 1, characterized in that, The conveying device (2) includes a conveying mounting frame (21) and conveying wheels that are rotatably mounted at both ends of the conveying mounting frame (21). A conveyor belt (22) is connected end to end between the two conveying wheels. A conveying motor (23) for connecting with the conveying wheels is provided on the conveying mounting frame (21). A conveying clamping plate (24) is provided on the conveying mounting frame (21). A conveying gap (25) is provided on the conveying clamping plate (24) along the conveying direction of the conveyor belt (22). The conveying gap (25) is used to adapt to the welding fixture (3).

4. The laser welding equipment for crystal oscillators according to claim 1, characterized in that, The positioning part (4) includes a positioning cylinder (41), and a positioning rod (42) is provided on the output rod of the positioning cylinder (41). The positioning rod (42) is horizontally placed in the conveying device (2) under the drive of the positioning cylinder (41).

5. A laser welding device for crystal oscillators according to claim 4, characterized in that, The frame (1) is provided with a support frame (9) at the welding station. The support frame (9) is provided with a first detection sensor (10) and a second detection sensor (11). The first detection sensor (10) and the second detection sensor (11) are respectively located on both sides of the positioning rod (42). The first detection sensor (10) is used to control the operation of the laser (5), and the second detection sensor (11) is used to control the operation of the positioning cylinder (41).

6. The laser welding equipment for crystal oscillators according to claim 5, characterized in that, The support frame (9) includes a support section (91) and an installation section (92). The support section (91) is disposed on the frame (1). The installation section (92) extends above the conveying device (2). The horizontal height of the installation section (92) is higher than the upper surface of the welding fixture (3). The first detection sensor (10) and the second detection sensor (11) are disposed on the installation section (92).

7. A laser welding device for crystal oscillators according to claim 5, characterized in that, The first detection sensor (10) and the second detection sensor (11) are proximity switches.

8. A laser welding device for crystal oscillators according to claim 5, characterized in that, A blocking cylinder (12) is provided on the frame (1). The blocking cylinder (12) is located on the front side of the conveying direction of the welding station. A blocking rod (13) is connected to the output rod of the blocking cylinder (12). The blocking rod (13) extends into the conveying device (2) under the drive of the blocking cylinder (12). The blocking cylinder (12) is controlled by the second detection sensor (11).

Images