Circuit element alignment welding device and jig thereof

Abstract

According to the circuit element alignment welding jig, a circuit element comprises a circuit board with a plurality of elements arranged on the surface, a welding ring arranged on the circuit board and a metal protective shell which is arranged on the welding ring and covers the elements. The welding jig comprises a base, a plurality of mounting grooves formed in the base at intervals and used for mounting a circuit board, a fixing mechanism arranged on the base and used for fixing a welding ring and a metal protective shell, and a pressing plate arranged on the fixing mechanism and capable of pressing the metal protective shell downwards. The fixing mechanism comprises a fixing frame, a plurality of fixing holes which are formed in the fixing frame at intervals and are respectively opposite to the plurality of mounting grooves, and fixing pieces which are respectively arranged in the plurality of fixing holes and are used for fixing the welding ring and the metal protective shell; the base is provided with a plurality of mounting grooves, the fixing mechanism is arranged, accurate alignment of the circuit board, the welding ring and the metal protective shell is achieved, the relative positions of the circuit board, the welding ring and the metal protective shell after alignment cannot be changed due to the transfer process or start and stop of a welding device, and the air tightness of a product after welding is guaranteed.

Description

Technical Field

[0001] The utility model belongs to the field of circuit element preparation, and in particular relates to a circuit element alignment welding device and a fixture. Background Art

[0002] There are many small components distributed on the surface of the circuit board. To protect the components and surface circuits on the circuit board from mechanical damage, a metal casing is generally welded to the circuit board to form the required circuit elements. With the advancement of material technology, soldering pads have begun to be used in the welding process of metal casings. During the process of welding the circuit board to the metal casing, the alignment of the circuit board, soldering pads and metal casing is involved. The conventional welding method is manual alignment followed by sintering. During the manual alignment of the circuit board, soldering pads and metal casing, the alignment of the three will deviate due to hand shaking. Even if there is no deviation in manual alignment, the inertia of the equipment during the start-up and shutdown of the equipment during the process of placing the aligned product on the cantilever of the sintering furnace and transferring it to the interior of the sintering furnace will cause the circuit board, soldering pads and metal casing to misalign. In addition, due to the relatively light weight of the metal casing, cold solder joints will occur after sintering, which cannot meet the airtightness requirements of the product and needs further improvement. Summary of the Invention

[0003] The purpose of the utility model is to overcome the shortcomings of the prior art and provide a circuit element alignment welding device and a fixture.

[0004] The utility model adopts the following technical solutions:

[0005] A circuit element alignment welding jig, the circuit element including a circuit board with multiple components arranged on the surface, a welding ring arranged on the circuit board, and a metal protective shell arranged on the welding ring to cover the multiple components. The welding jig includes a base, multiple mounting grooves arranged at intervals on the base for mounting the circuit board, a fixing mechanism arranged on the base for fixing the welding ring and the metal protective shell, and a pressing plate arranged on the fixing mechanism for pressing down the metal protective shell. The fixing mechanism includes a fixing frame, multiple fixing holes arranged at intervals on the fixing frame and respectively opposite to the multiple mounting grooves, and fixing parts respectively arranged in the multiple fixing holes for fixing the welding ring and the metal protective shell.

[0006] Furthermore, the fixing member includes three fixing columns that are spaced apart on the wall of the fixing hole and contact three consecutive side surfaces of the welding ring and the metal protective shell.

[0007] Furthermore, the mounting slot includes a mounting slot body for mounting a circuit board and an arc-shaped pick-up and place slot extending outward from an inner side surface of the mounting slot body.

[0008] Furthermore, a plurality of positioning grooves opposite to the plurality of mounting grooves are formed on the bottom surface of the pressing plate, and the upper end of the metal protective shell can be embedded in the corresponding positioning grooves.

[0009] Furthermore, it also includes a positioning mechanism arranged between the base, the fixing mechanism and the pressure plate, the positioning mechanism including a plurality of upper positioning columns arranged at intervals on the top surface of the fixing frame, a plurality of lower positioning columns arranged on the bottom surface of the fixing frame opposite to the plurality of upper positioning columns, a plurality of upper positioning holes arranged on the pressure plate for the plurality of upper positioning columns to be embedded in, and a plurality of lower positioning holes arranged on the base for the plurality of lower positioning columns to be embedded in.

[0010] Furthermore, the welding ring is arranged in a square shape and surrounds multiple components and devices and is arranged on the circuit board.

[0011] A circuit element alignment welding device comprises a sintering furnace body, a sintering cantilever arranged in the sintering furnace body, and a jig as described above and placed on the sintering cantilever.

[0012] Furthermore, a sintering cavity is formed inside the sintering furnace body, and the sintering cantilever includes a support capable of sealing the sintering cavity, a connecting block arranged on the support, and two sintering rods spaced apart and arranged on the connecting block and capable of extending into the sintering cavity.

[0013] Furthermore, the base includes a bottom plate supported on the two sintered rods and a limiting portion arranged at the bottom of the bottom plate and between the two sintered rods, and a plurality of the mounting grooves are arranged on the bottom plate.

[0014] From the above description of the utility model, it can be seen that compared with the prior art, the beneficial effects of the utility model are: the present application realizes accurate alignment of the circuit board, welding ring and metal protective shell by setting multiple installation slots on the base and equipping it with a fixing mechanism, and the relative positions of the aligned circuit board, welding ring and metal protective shell will not change due to the transportation process or the start and stop of the welding device, and the weight of the pressure plate itself can make the metal shell, welding ring and circuit board in close contact, ensuring the air tightness of the product after welding; in addition, a positioning mechanism is set between the base, the fixed frame and the pressure plate, so that the base, the fixed frame and the pressure plate are accurately aligned, thereby ensuring the alignment accuracy of the product and ensuring the product welding qualification rate and air tightness. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the welding device;

[0016] Figure 2 Schematic diagram of the welding fixture structure Figure 1 ;

[0017] Figure 3 Schematic diagram of the welding fixture structure Figure 2 ;

[0018] Figure 4 is a structural diagram of circuit elements;

[0019] Figure 5is a structural diagram of the base;

[0020] Figure 6 It is a structural diagram of the fixing mechanism;

[0021] Figure 7 It is a structural diagram of the pressing plate;

[0022] In the figure, 1-sintering furnace body, 2-sintering cantilever, 3-welding fixture, 4-base, 5-mounting slot, 6-fixing mechanism, 7-pressing plate, 8-positioning mechanism, 9-circuit element, 11-sintering chamber, 21-support, 22-connecting block, 23-sintering rod, 41-base plate, 42-limiting part, 51-mounting slot body, 52-arc-shaped picking and placing slot, 61-fixing frame, 62-fixing hole, 63-fixing column 71-positioning slot, 81-upper positioning column, 82-lower positioning column, 83-upper positioning hole, 84-lower positioning hole, 91-circuit board, 92-welding ring, 93-metal protective shell. DETAILED DESCRIPTION

[0023] The present invention is further described below through specific implementation methods.

[0024] Reference Figures 1 to 7 As shown, a circuit component alignment welding device includes a sintering furnace body 1, a sintering cantilever 2 arranged in the sintering furnace body 1, and a welding jig 3 placed on the sintering cantilever 2, wherein a sintering chamber 11 is formed inside the sintering furnace body 1, and the sintering cantilever 2 includes a support 21 that can seal the sintering chamber 11, a connecting block 22 arranged on the support 21, and two sintering rods 23 that are arranged on the connecting block 22 at intervals and can extend into the sintering chamber 11.

[0025] The circuit element 9 includes a circuit board 91 with multiple components arranged on the surface, a welding ring 92 arranged on the circuit board 91, and a metal protective shell 93 arranged on the welding ring 92 to cover the multiple components, wherein the welding ring 92 is arranged in a square shape and surrounds the multiple components and is arranged on the circuit board 91; the metal protective shell 93 is arranged in a square shape on the welding ring 92.

[0026] The welding jig 3 includes a base 4, a plurality of mounting grooves 5 spaced apart on the base 4 for mounting a circuit board 91, a fixing mechanism 6 arranged on the base 4 for fixing a welding ring 92 and a metal protective shell 93, a pressing plate 7 arranged on the fixing mechanism 6 and capable of pressing down the metal protective shell 93, and a positioning mechanism 8 arranged between the base 4, the fixing mechanism 6 and the pressing plate 7.

[0027] The base 4 includes a bottom plate 41 supported on the two sintered rods 23 and a limiting portion 42 arranged at the bottom of the bottom plate 41 and between the two sintered rods 23, wherein a plurality of mounting grooves 5 are arranged on the bottom plate 41. By limiting the structure of the base 4 and setting the limiting portion 42, the welding jig 3 is not easily detached from the sintered cantilever 2 in the horizontal direction.

[0028] The mounting slot 5 includes a mounting slot body 515 for mounting the circuit board 91 and an arc-shaped pick-up and placement slot 52 extending outward from the inner side of the mounting slot body 1. The arc-shaped pick-up and placement slot 52 facilitates the pick-up and placement of the circuit board 91 in the mounting slot 5.

[0029] The fixing mechanism 6 includes a fixing frame 61, a plurality of fixing holes 62 spaced apart on the fixing frame 61 and respectively opposite to the plurality of mounting grooves 5, and fixing members respectively arranged in the plurality of fixing holes 62 for fixing the welding ring 92 and the metal protective shell 93, wherein the fixing members include three fixing columns 63 spaced apart on the hole walls of the fixing holes 62 and in contact with three consecutive side surfaces of the welding ring 92 and the metal protective shell 93.

[0030] The pressing plate 7 has a plurality of positioning grooves 71 formed on its bottom surface, which are opposite to the plurality of mounting grooves 5. When the jig is assembled, the upper end of the metal protective shell 93 can be embedded in the relative positioning groove 71. Since the pressing plate 7 itself has a certain weight, it can ensure that the metal protective shell 93, the welding ring 92, and the circuit board 919 are in close contact, and the upper end of the metal protective shell 3 is embedded in the relative positioning groove 71, which can avoid the misalignment of the product during the transportation of the sintering furnace after alignment, or the misalignment of the aligned product caused by the start and stop of the sintering cantilever 2, thereby effectively ensuring the yield of the circuit element 9; specifically, the pressing plate 7 is made of brass, wherein the density of brass is 8.4-8.7g / cm³, the size of the pressing plate is 13.2*11.2*0.265cm, and its mass is about 289.91g, so that the pressing plate 7 has enough weight to press the metal protective shell 93 tightly, ensuring that the metal protective shell 93 is in full contact with the welding ring 92.

[0031] The positioning mechanism 8 includes a plurality of upper positioning posts 81 spaced apart on the top surface of the fixed frame 61, a plurality of lower positioning posts 2 arranged on the bottom surface of the fixed frame 61 opposite to the plurality of upper positioning posts 818, a plurality of upper positioning holes 83 arranged on the pressure plate 7 for the plurality of upper positioning posts 81 to be embedded in, and a plurality of lower positioning holes 84 arranged on the base 4 for the plurality of lower positioning posts 82 to be embedded in. Through the cooperation between the positioning posts and the positioning holes, the fixed frame 61 and the pressure plate 7 can be quickly installed on the base 4, and the circuit board 91, the welding ring 92 and the metal protective shell 93 can be accurately aligned.

[0032] The specific steps for soldering circuit components are as follows:

[0033] Step 1: Place the circuit boards 91 one by one in the mounting slots 5, then align the lower positioning posts 82 on the fixing frame 61 with the lower positioning holes 84, and lower the fixing frame 61 vertically so that it is accurately stacked on the base 4;

[0034] Step 2: Under the action of the three fixing posts 63, stack the welding ring 92 and the metal protective shell 93 one by one on the circuit board 91, so that the side surfaces of the welding ring 92 and the metal protective shell 93 are in contact with the corresponding fixing posts 63;

[0035] Step 3: After the circuit components 9 in the multiple mounting slots 5 are stacked, the upper positioning posts 81 are engaged with the upper positioning holes 83, and the pressing plate 7 is stacked on the fixing frame 61, so that the upper ends of the metal protective shells 93 are embedded in the corresponding positioning slots 71, thereby limiting the metal protective shells 93.

[0036] Step 4: Move the welding fixture 3 onto the sintering cantilever 2 so that the base plate 41 is supported on the two sintering rods 23, and then install the sintering cantilever 2 on the sintering furnace body 1 to sinter and weld the circuit element 9;

[0037] Step 5: After sintering is completed, take out the sintered cantilever 2, remove the welding fixture 3, and then remove the pressing plate 7 and the fixing frame 61 in sequence, and take out the sintered and welded circuit element 9 from the arc-shaped pick-and-place groove 52 to complete the welding of the circuit element 9.

[0038] The present application achieves accurate alignment of the circuit board 91, the welding ring 92 and the metal protective shell 93 by setting multiple installation slots 5 on the base 4 and equipping it with a fixing mechanism 6. The relative positions of the circuit board 91, the welding ring 92 and the metal protective shell 93 after alignment will not change due to the transportation process or the start and stop of the welding device, and the weight of the pressure plate 7 itself can make the metal shell 93, the welding ring 92 and the circuit board 91 in close contact, ensuring the airtightness of the product after welding; in addition, a positioning mechanism 8 is set between the base 4, the fixing frame 61 and the pressure plate 7, so that the base 4, the fixing frame 61 and the pressure plate 7 are accurately aligned, thereby ensuring the alignment accuracy of the product and ensuring the product welding qualification rate and airtightness.

[0039] The above description is merely a preferred embodiment of the present invention and therefore cannot be used to limit the scope of implementation of the present invention. In other words, equivalent changes and modifications made according to the scope of application of the present invention and the contents of the specification should still fall within the scope of the present invention.

Claims

1. A circuit component alignment soldering jig, the circuit component comprising a circuit board with a plurality of components arranged on its surface, a soldering ring disposed on the circuit board, and a metal protective shell disposed on the soldering ring and covering the plurality of components, characterized in that: It includes a base, a plurality of mounting grooves spaced apart on the base for mounting a circuit board, a fixing mechanism disposed on the base for fixing a welding ring and a metal protective shell, and a pressing plate disposed on the fixing mechanism for pressing down the metal protective shell. The fixing mechanism includes a fixing frame, a plurality of fixing holes spaced apart on the fixing frame and respectively opposite to the plurality of mounting grooves, and fixing parts respectively disposed in the plurality of fixing holes for fixing the welding ring and the metal protective shell.

2. The circuit component alignment welding jig according to claim 1, characterized in that: The fixing member comprises three fixing columns which are spaced apart and contact three consecutive side surfaces of the fixing hole wall and the welding ring and the metal protective shell.

3. The circuit component alignment welding jig according to claim 2, characterized in that: The mounting slot comprises a mounting slot body for mounting a circuit board and an arc-shaped taking-and-placing slot extending outward from the inner side surface of the mounting slot body.

4. The circuit component alignment welding jig according to claim 1, characterized in that: The bottom surface of the pressing plate is formed with a plurality of positioning grooves opposite to the plurality of mounting grooves, and the upper end of the metal protective shell can be embedded in the opposite positioning grooves.

5. The circuit component alignment welding jig according to claim 1, characterized in that: It also includes a positioning mechanism arranged between the base, the fixing mechanism and the pressure plate, the positioning mechanism including a plurality of upper positioning columns arranged at intervals on the top surface of the fixing frame, a plurality of lower positioning columns arranged on the bottom surface of the fixing frame opposite to the plurality of upper positioning columns, a plurality of upper positioning holes arranged on the pressure plate for the plurality of upper positioning columns to be embedded in, and a plurality of lower positioning holes arranged on the base for the plurality of lower positioning columns to be embedded in.

6. The circuit component alignment welding jig according to claim 1, characterized in that: The welding ring is arranged in a square shape and surrounds a plurality of components and devices and is arranged on the circuit board.

7. A circuit component alignment welding device, characterized in that: The invention comprises a sintering furnace body, a sintering cantilever arranged in the sintering furnace body, and a jig according to any one of claims 1 to 6 placed on the sintering cantilever.

8. The circuit component alignment welding device according to claim 7, characterized in that: A sintering cavity is formed inside the sintering furnace body. The sintering cantilever comprises a support capable of sealing the sintering cavity, a connecting block arranged on the support, and two sintering rods arranged on the connecting block at intervals and capable of extending into the sintering cavity.

9. The circuit component alignment welding device according to claim 8, characterized in that: The base comprises a bottom plate supported on two sintered rods and a limiting portion arranged at the bottom of the bottom plate and between the two sintered rods, and a plurality of mounting grooves are arranged on the bottom plate.

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