Solder paste printing device for bottom plate of rectifier module

Abstract

The utility model discloses a solder paste printing device for a bottom plate of a rectifier module. The rectifier module bottom plate solder paste printing device comprises a base, a movable table used for bearing a tray is arranged in the middle of the base, the tray is used for storing a copper bottom plate, a rapid positioning block is arranged on the top face of the movable table and used for rapidly positioning the tray, and the base is provided with a positioning mechanism used for locking the movable table. One side of the base is connected with a rotating shaft through a lifting mechanism, a clamp for fixing the steel mesh is arranged on the rotating shaft, and the rotating shaft is rotated to press the steel mesh on the top face of the copper bottom plate. The utility model solves the problems of poor welding effect and influence on product performance in the prior art.

Description

Technical Field

[0001] The utility model relates to the technical field of tooling, in particular to a rectifier module bottom plate solder paste printing device. Background Art

[0002] In the production process of rectifier modules, the ceramic pieces are currently tinned by silk screen. The copper sheet on the bottom of the ceramic piece is first coated with solder paste, and then the solder paste on the bottom is dried, so that it is convenient to flip the ceramic piece and tin the copper sheet on the top. However, after the solder paste is dried, the flux content is reduced. After sintering, gaps and voids are easily generated between the ceramic piece and the copper bottom plate, resulting in poor welding effect and affecting product performance. Utility Model Content

[0003] The utility model aims to provide a rectifier module bottom plate solder paste printing device for improving poor welding effect and ensuring product performance in view of the deficiencies in the prior art.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the rectifier module bottom plate solder paste printing device of the utility model is:

[0005] A rectifier module bottom plate solder paste printing device comprises a base, a movable table for supporting a tray is arranged in the middle of the base, the tray is used to store the copper bottom plate, a quick positioning block is arranged on the top surface of the movable table, the quick positioning block is used to quickly position the tray, the base is provided with a positioning mechanism for locking the movable table, one side of the base is connected with a rotating shaft through a lifting mechanism, a clamp for fixing a steel mesh is arranged on the rotating shaft, and the rotating shaft is rotated to press the steel mesh onto the top surface of the copper bottom plate.

[0006] Preferably, the positioning mechanism includes a plurality of bosses fixedly connected to the base, the bosses surround the movable platform, and the bosses are threadedly connected with limiting bolts.

[0007] Preferably, the lifting mechanism includes two vertical screws fixed to the base, a limiting nut is provided on the screw, a slider sleeved on the outside of the screw is provided above the limiting nut, the rotating shaft is installed between the two sliders, and a locking nut threadably connected to the screw is provided above the slider.

[0008] Preferably, the clamp includes a slot block, the outer side wall of the closed end of the slot block is provided with a plurality of pivot arms, the slot block is fixedly connected to the rotating shaft through the pivot arms, the side wall of the slot block is threadedly connected with a plurality of clamping bolts, and the clamping bolts fix the steel mesh in the groove of the slot block.

[0009] Preferably, at least one rotating arm is provided with a long rod, and a counterweight is provided on the side of the long rod away from the rotating shaft, and the counterweight keeps the steel mesh in a tilted state in a free state.

[0010] Preferably, the screw head of the clamping bolt is provided with a rubber pressure head.

[0011] Compared with the prior art, the utility model has the following advantages:

[0012] During debugging, the tray carrying the copper base plate is placed on the movable table through the quick positioning block, and the corresponding steel mesh is fixed by the clamp. The rotating shaft is rotated to drive the steel mesh to press against the copper base plate, and the position of the movable table is adjusted so that each group of leakage holes on the steel mesh is located above the copper base plate. The quick positioning block can prevent the tray from moving when the position of the movable table is adjusted. After the position of the movable table is determined, the movable table is locked by the positioning mechanism, and mass production can be started. The solder paste is accurately brushed onto the copper base plate through the leakage holes on the steel mesh. There is no need to dry it, and there is no need to brush tin on the bottom of the ceramic tile. At this time, the flux component in the solder paste on the copper base plate will not be reduced, thereby improving the welding effect between the copper base plate and the ceramic tile, ensuring product performance, and at the same time ensuring production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the solder paste printing device for the rectifier module bottom plate of the utility model;

[0014] Figure 2 It is a structural schematic diagram of the lifting mechanism of the utility model;

[0015] Figure 3 It is a structural schematic diagram of the clamp of the utility model.

[0016] Among them, 1 base, 2 tray, 3 movable table, 31 quick positioning block, 4 copper bottom plate, 5 positioning mechanism, 51 boss, 52 limit bolt, 6 lifting mechanism, 61 screw, 62 limit nut, 63 slider, 64 locking nut, 7 rotating shaft, 8 clamp, 81 slot block, 82 rotating arm, 83 clamping bolt, 84 rubber pressure head, 85 long rod, 86 counterweight, 9 steel mesh. DETAILED DESCRIPTION

[0017] The present invention is further explained below in conjunction with the accompanying drawings and specific implementation methods. It should be understood that these implementation methods are only used to illustrate the present invention and are not used to limit the scope of the present invention. After reading the present invention, various equivalent forms of modifications to the present invention by those skilled in the art all fall within the scope defined by the claims attached to this application.

[0018] like Figure 1-3As shown, a solder paste printing device for a rectifier module base plate includes a base 1, a movable table 3 for supporting a tray 2 is placed in the middle of the base, the tray is used to store a copper base plate 4, two symmetrical quick positioning blocks 31 are installed on the top surface of the movable table, the quick positioning blocks are used to quickly position the tray, and the quick positioning blocks are L-shaped, one of the quick positioning blocks can be movably connected to the movable table to change the spacing between the two quick positioning blocks to adapt to different trays, and a positioning mechanism 5 for locking the movable table is installed on the edge of the base, the positioning mechanism includes five bosses 51 fixed to the base, two of which are located on the left side of the movable table, two bosses are located on the right side of the movable table, and one boss is located on the front side of the movable table, and the bosses are threadedly connected to limit bolts 52, and a lifting mechanism 6 is installed on the rear side of the base, and the lifting mechanism includes two vertical A screw 61 is threadedly connected to a limit nut 62, a slider 63 which is sleeved on the outside of the screw is arranged above the limit nut, a locking nut 64 which is threadedly connected to the screw is arranged above the slider, a rotating shaft 7 is installed between the two sliders, and a clamp 8 for fixing the steel mesh is installed on the rotating shaft, the clamp includes a slot block 81, the outer wall of the closed end of the slot block is fixedly connected to three equidistantly arranged rotating arms 82, the slot block is fixedly connected to the rotating shaft through the rotating arms, and the side walls of the slot block are threadedly connected to three clamping bolts 83, the clamping bolts fix the steel mesh 9 in the groove of the slot block, and a rubber pressure head 84 is installed on the screw head of the clamping bolt to avoid clamping the steel mesh, a rotating arm in the middle is fixedly connected to a long rod 85, and a counterweight block 86 is installed on the side of the long rod away from the rotating shaft. The counterweight block keeps the steel mesh in a tilted state in the free state, which is convenient for taking and placing the pallet.

[0019] The specific working process of a rectifier module base plate solder paste printing device is as follows: first debug, install the steel mesh in the groove of the slot block through the clamping bolts, then place the tray carrying the copper base plate between two quick positioning blocks, rotate the rotating shaft, and press the steel mesh to the copper base plate. When the steel mesh and the copper base plate are completely fitted together, rotate the limit nut and the locking nut. The limit nut and the locking nut cooperate with the locking slider to determine the height of the rotating shaft, so that the steel mesh can adapt to the height of the copper base plate when rotating. Move the movable table so that each group of leakage holes on the steel mesh is located above the copper base plate, and tighten the limit bolts one by one. Five limit bolts cooperate to lock the movable table, and mass production can be carried out. The utility model changes the existing production process, and the solder paste originally applied to the bottom surface of the ceramic tile is applied to the top surface of the copper base plate instead, so that the solder paste can be kept in a wet state for assembling the copper base plate, the ceramic tile and other parts, and then enters the sintering furnace to complete sintering. During the sintering process, since the solder paste retains the content of the flux component, the welding effect between the copper base plate and the ceramic tile can be improved, and the product performance can be guaranteed.

Claims

1. A solder paste printing device for a rectifier module bottom plate, characterized in that: It includes a base, a movable table for supporting a tray is arranged in the middle of the base, the tray is used to store the copper bottom plate, a quick positioning block is arranged on the top surface of the movable table, the quick positioning block is used to quickly position the tray, the base is provided with a positioning mechanism for locking the movable table, one side of the base is connected with a rotating shaft through a lifting mechanism, a clamp for fixing a steel mesh is arranged on the rotating shaft, and the rotating shaft is rotated to press the steel mesh against the top surface of the copper bottom plate.

2. The solder paste printing device for the rectifier module bottom plate according to claim 1, characterized in that: The positioning mechanism comprises a plurality of bosses fixedly connected to the base, the bosses surround the movable platform, and the bosses are threadedly connected with limiting bolts.

3. The solder paste printing device for the rectifier module bottom plate according to claim 1, characterized in that: The lifting mechanism includes two vertical screw rods fixedly connected to the base, a limit nut is arranged on the screw rod, a slider sleeved on the outside of the screw rod is arranged above the limit nut, the rotating shaft is installed between the two sliders, and a locking nut threadably connected to the screw rod is arranged above the slider.

4. The rectifier module bottom plate solder paste printing device according to claim 1, characterized in that: The clamp includes a slot block, the outer side wall of the closed end of the slot block is provided with a plurality of rotating arms, the slot block is fixedly connected to the rotating shaft through the rotating arms, the side wall of the slot block is threadedly connected with a plurality of clamping bolts, and the clamping bolts fix the steel mesh in the groove of the slot block.

5. The solder paste printing device for the rectifier module bottom plate according to claim 4, characterized in that: At least one rotating arm is provided with a long rod, and a counterweight is provided on one side of the long rod away from the rotating shaft. The counterweight keeps the steel mesh in a tilted state in a free state.

6. The solder paste printing device for the rectifier module bottom plate according to claim 4, characterized in that: The screw head of the clamping bolt is provided with a rubber pressure head.

Images