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CN-121985490-A - SMT surface tin cream installation

CN121985490ACN 121985490 ACN121985490 ACN 121985490ACN-121985490-A

Abstract

The invention discloses an SMT surface solder paste mounting machine, which belongs to the technical field of circuit board processing equipment and comprises a mounting frame and a solder paste printing mechanism which are slidably mounted on a workbench, wherein the solder paste printing mechanism comprises a screen scraping assembly, two fixing frames, two groups of blowing assemblies, a vent pipe, a driven piece, a driving piece, a gas transmission assembly and an adjusting assembly. During printing, air is supplied to the vent pipe through the air transmission component, air enters the second hollow plate through the hose and the fixing pipe, the second through groove of the fixing frame is aligned with and staggered with the periodicity of the second air nozzle, then the poking plates on two sides of the pulsed air flow impact scraper are formed, the elastic restoring force of the leaf spring is matched to drive the scraper to vibrate, vibration energy of the scraper can directly act on solder paste, so that the molecular cohesive force inside the solder paste is broken to reduce viscosity, and meanwhile, the mechanical impact force breaks up solder paste agglomerated particles, so that the particles are prevented from blocking tiny meshes of a steel mesh.

Inventors

  • ZHU HAIPENG

Assignees

  • 武汉品信电子有限公司

Dates

Publication Date
20260505
Application Date
20260226

Claims (10)

  1. 1. The utility model provides a SMT surface tin cream installation, includes installing frame and tin cream printing mechanism on the workstation, install a plurality of year thing boards on the installing frame, its characterized in that, tin cream printing mechanism includes: The scraping net assembly comprises a second mounting plate and a cutter holder, wherein the second mounting plate is connected with the cutter holder through a plurality of leaf springs, a scraper is arranged on the cutter holder, and poking plates are arranged on two sides of the scraper; The two fixing frames are arranged on the bottom surface of the second mounting plate, and a plurality of second through grooves are formed in the fixing frames at equal intervals; Two sets of blowing assemblies, the blowing assemblies comprising: The upper end and the lower end of the fixed pipe are respectively provided with a second hollow plate and a first hollow plate, one side, away from the second hollow plate and the first hollow plate, of the fixed pipe is respectively provided with a plurality of second air nozzles and first air nozzles, and the second air nozzles are positioned under the toggle plate and are in sliding contact with the fixed frame; the vent pipe is connected with the fixed pipe through a hose; The driven piece is fixedly connected with the first hollow plate; the driving piece is used for driving the driven piece to reciprocate horizontally by utilizing the air flow in the vent pipe; the adjusting component is used for driving the second mounting plate to move horizontally and vertically; and the air conveying assembly is used for conveying air into the two ventilating pipes.
  2. 2. The SMT surface solder paste placement machine of claim 1, wherein said adjustment assembly comprises: The two hydraulic cylinders are arranged on the top surface of the workbench; The two mounting seats are respectively fixedly connected with the extending ends of the two hydraulic cylinders, and a second motor is arranged on any mounting seat; The second lead screw is rotationally connected with the two mounting seats, one end of the second lead screw is fixedly connected with a power output shaft of the second motor, a second lead screw nut is arranged on the second lead screw, a second fixing plate is arranged on the second lead screw nut, and the second fixing plate is fixedly connected with the second mounting plate; And the two sliding rods are fixedly connected with the two mounting seats.
  3. 3. The SMT surface solder paste placement machine of claim 2, wherein said gas delivery assembly comprises: The air storage tank is arranged on the top surface of the second mounting plate, is fixedly connected with and communicated with the two ventilation pipes; And the air pump is arranged on the top surface of the second mounting plate and is used for conveying gas into the gas storage tank.
  4. 4. The SMT surface solder paste machine of claim 3, wherein said driving member comprises: The vertical rod penetrates through the bottom surface of the vent pipe and is rotationally connected with the vent pipe; the fan blades are positioned in the vent pipe and fixedly connected with the vertical rods; and the half gear is arranged at the lower end of the vertical rod.
  5. 5. The SMT surface solder paste machine of claim 4, wherein said follower comprises: The inner wall of the connecting frame is provided with a plurality of teeth matched with the half gear; The two connecting plates are fixedly connected with the connecting frame and the first hollow plate.
  6. 6. The SMT surface solder paste placement machine of claim 1, wherein said carrier plate top surface is mounted with a set of PCB board brackets and a set of steel mesh brackets.
  7. 7. The SMT surface solder paste placement machine of claim 2, wherein said solder paste printing mechanism further comprises: the recovery box is arranged on the top surface of the workbench and is provided with a groove for supporting a steel net; And the adsorption assembly is connected with the second screw rod.
  8. 8. The SMT surface solder paste placement machine of claim 7, wherein said suction assembly comprises: The first fixing plate is provided with a third screw nut, and the third screw nut is sleeved on the second screw; the first mounting plate is fixedly connected with the first fixing plate; the plurality of electric push rods are all installed on the bottom surface of the first mounting plate, and the electric sucking discs are installed at the extending ends of the electric push rods.
  9. 9. The SMT surface solder paste placement machine of claim 1, further comprising a moving mechanism, said moving mechanism comprising: The two sliding rails are arranged on the top surface of the workbench; the sliding blocks are respectively connected with the two sliding rails in a sliding way, and the tops of the sliding blocks are fixedly connected with the mounting frame; the two mounting blocks are fixedly connected with the two sliding rails; The two bearing seats are respectively arranged on the top surfaces of the two mounting blocks; the first lead screw is rotationally connected with the two bearing seats, and is provided with a first lead screw nut; the first motor is arranged on the bottom surface of the mounting block and is connected with the first screw rod through a transmission belt; and the movable seat is fixedly connected with the first screw nut and the mounting frame.
  10. 10. The SMT surface solder paste placement machine of claim 1, further comprising: the protective shell is arranged on the top surface of the workbench; and the patch mechanism is arranged on the top surface of the workbench and is positioned in the protective shell.

Description

SMT surface tin cream installation Technical Field The invention belongs to the technical field of circuit board processing equipment, and particularly relates to an SMT surface tin paste mounting machine. Background SMT is used as a core process in the field of electronic manufacturing, and along with continuous upgrade of product miniaturization, high density and high reliability in industries such as consumer electronics, new energy automobile electronics and the like, the SMT has become a key technical system for supporting 01005 specifications and below for miniature electronic component assembly, and an SMT surface solder paste mounting machine is used as a core device for connecting solder paste printing and component mounting, and the solder paste printing precision and the steel mesh maintenance efficiency directly determine the welding yield and the production takt of electronic finished products. Currently, the pitch of pins of electronic elements is reduced from 0.3mm to below 0.15mm, and the diameter of a steel mesh is reduced to 0.1mm or smaller, so that strict requirements are imposed on the solder paste filling capability and printing consistency of a mounter. Although the existing SMT surface solder paste sticking machine has realized basic automatic functions such as automatic substrate conveying, scraper position servo adjustment, solder paste automatic feeding and the like, the following defects still exist: Firstly, the fine mesh Kong Xigao is filled by increasing the pressure of a scraper, so that the abrasion of meshes of a steel mesh and the deformation of a substrate are easily caused, and high-viscosity solder paste agglomerated particles cannot be dispersed, so that the plugging rate is high; Secondly, the cleaning efficiency of the steel mesh is low, the manual cleaning is stopped for more than 30 minutes, the steel mesh is easy to damage, an independent mechanical cleaning assembly is required to be provided with an additional power source, and the volume and the cost of equipment are increased. Disclosure of Invention The invention aims to provide an SMT surface solder paste sticking machine, which is used for solving the technical problems that in the prior art, fine mesh Kong Xigao filling depends on increasing scraper pressure, steel mesh holes are easy to wear, a substrate is easy to deform, high-viscosity solder paste agglomerated particles cannot be dispersed, and the plugging rate is high. In order to achieve the above purpose, the present invention adopts the following technical scheme: The SMT surface solder paste mounting machine comprises a mounting frame and a solder paste printing mechanism, wherein the mounting frame is mounted on a workbench, a plurality of object carrying plates are mounted on the mounting frame, the solder paste printing mechanism comprises a screen scraping assembly and a cutter holder, the second mounting plate is connected with the cutter holder through a plurality of plate springs, a scraper is mounted on the cutter holder, stirring plates are mounted on two sides of the scraper, two fixing frames are mounted on the bottom surface of the second mounting plate, a plurality of second through grooves are formed in the fixing frames at equal intervals, two groups of blowing assemblies comprise fixing pipes, a second hollow plate and a first hollow plate are mounted at the upper end and the lower end of each fixing pipe, a plurality of second air nozzles and first air nozzles are mounted at one side, away from each other, of the second hollow plate and the first hollow plate, are located right below the stirring plates and are in sliding contact with the fixing frames, the air pipes are connected with the fixing pipes through flexible pipes, driven members are fixedly connected with the first hollow plates, and are used for driving the driven members to move horizontally and the driven members and are used for driving the driven members to move horizontally and vertically. The adjusting assembly comprises two hydraulic cylinders, two mounting seats, a second lead screw and two slide bars, wherein the two hydraulic cylinders are mounted on the top surface of the workbench, the two mounting seats are fixedly connected with the extending ends of the two hydraulic cylinders respectively, a second motor is mounted on any one of the mounting seats, the second lead screw is rotatably connected with the two mounting seats, one end of the second lead screw is fixedly connected with a power output shaft of the second motor, a second lead screw nut is mounted on the second lead screw nut, a second fixing plate is mounted on the second lead screw nut, the second fixing plate is fixedly connected with a second mounting plate, and the two slide bars are fixedly connected with the two mounting seats. Preferably, the gas transmission assembly comprises a gas storage tank and a gas pump, wherein the gas storage tank is arranged on the top surface of the second m