阅读说明：本技术 Smt贴片工艺及应用于该工艺的输送装置 (SMT (surface mount technology) chip mounting process and conveying device applied to SMT chip mounting process ) 是由 曾茂添 郑汉武 谢宇丰 梅靖然 岳宗振 于 2019-10-30 设计创作，主要内容包括：本发明公开了一种SMT贴片工艺及应用于该工艺的输送装置,涉及SMT贴片的技术领域,解决了现有SMT贴片过程中胶和元器件在PCB板转运时容易发生位置偏移的问题,其技术方案要点是输送装置包括两竖板、支撑腿、转动连接在两支撑板相互靠近一侧的若干转动辊、固定连接在支撑板上的电机、套设在转动辊上的传送带以及支撑在两传送带上的夹持机构；贴片工艺包括：a．固定PCB板；b．安装夹持机构；c．点胶；d．检查；e．元件贴装；f．回流焊；g．AOI测试；h．翻转贴片,输送带对夹持机构进行输送,依次穿过点胶机、贴片机和回流焊炉,使得输送的过程当中PCB板能够保持平整,从而使得印刷到PCB板上的胶和零件不容易出现位置的偏移。(The invention discloses an SMT paster process and a conveying device applied to the process, relates to the technical field of SMT paster, and solves the problem that glue and components are easy to shift in position during transportation of a PCB (printed circuit board) in the existing SMT paster process; the paster process comprises the following steps: a. fixing the PCB; b. installing a clamping mechanism; c. dispensing; d. checking; e. mounting components; f. reflow soldering; AOI test; h. the paster of overturning, the conveyer belt carries fixture, passes point gum machine, chip mounter and reflow oven in proper order for the PCB board can keep leveling in the middle of the process of carrying, thereby makes the offset that the glue that prints on the PCB board and part are difficult to appear the position.)

1. A conveyor apparatus, characterized by: the device comprises two vertical plates (1) which are vertically arranged and are parallel to each other, supporting legs (11) which are fixedly connected to the bottoms of the two ends of the two supporting plates (44), a plurality of rotating rollers (2) which are rotatably connected to one side, close to each other, of the two supporting plates (44), a motor (21) which is fixedly connected to the supporting plates (44) and is used for driving one rotating roller (2) to rotate, a conveying belt (3) which is sleeved on the rotating rollers (2) and a clamping mechanism (4) which is supported on the two conveying belts (3);

the top surfaces of the conveyor belts (3) are horizontally arranged, the clamping mechanism (4) comprises support rods (41) with two ends respectively supported at the tops of the two conveyor belts (3), connecting rods (43) arranged on the two support rods (41), support plates (44) fixedly connected to the sides, close to each other, of the two connecting rods (43) and clamping jaws (45) arranged on the sides, close to each other, of the two support plates (44) and located at two ends of each support plate (44), and the clamping jaws (45) are used for clamping the PCB;

the support plate (44) is horizontally disposed.

2. The delivery device of claim 1, wherein: the clamping jaw (45) comprises a horizontally arranged bottom plate (451) fixedly connected to the connecting rod (43) and a pressing plate (452) rotatably connected to the bottom plate (451);

storage tank (4511) have been seted up along vertical direction to the one end that deviates from connecting rod (43) at bottom plate (451) top, both sides that clamp plate (452) are close to connecting rod (43) one end all are provided with fixed cover (454) of fixed connection on bottom plate (451), be provided with in fixed cover (454) and rotate fixed cover (454) and be connected and pivot (453) on clamp plate (452) fixed connection, bottom plate (451) top is seted up and is located recess (4512) between fixed cover (454) and storage tank (4511), be provided with fixed connection in recess (4512) on bottom plate (451) and can inhale magnetism piece (455) together with clamp plate (452) absorption.

3. The delivery device of claim 1, wherein: the connecting rod (43) penetrates through the supporting rod (41) along the length direction, the connecting rod (43) is rotatably connected to the supporting rod (41), the top of the supporting rod (41) is in threaded connection with a fastening bolt (431), and one end of the bottom of the fastening bolt (431) extends into the supporting rod (41) to be in contact with the outer side of the connecting rod (43).

4. A delivery device as claimed in claim 3, wherein: two one side that backup pad (44) deviate from each other all is provided with locating plate (46) that run through backup pad (44) along conveyer belt (3) direction of transfer, and locating slot (441) of mutually supporting with locating plate (46) one end is seted up to one side that two backup pad (44) deviate from each other, and when locating plate (46) inserted locating slot (441) and is higher than locating slot (441) and mutually supports, the PCB board level of centre gripping on clamping jaw (45) sets up.

5. The delivery device of claim 1, wherein: the conveying belt (3) is fixedly connected with a plurality of positioning convex blocks (31) on the outer side, connecting plates (42) are arranged at positions, close to two ends, of one side, close to each other, of the supporting plate (44), the two ends of each connecting plate (42) are fixedly connected to the supporting plate (44), and a plurality of positioning grooves (421) matched with the positioning convex blocks (31) are formed in the bottoms of the connecting plates (42).

6. The delivery device of claim 2, wherein: one side of the pressure plate (452) close to the accommodating groove (4511) is fixedly connected with an elastic pad (4521) which is positioned at one end of the pressure plate (452) departing from the supporting plate (44).

7. An SMT chip process using the conveying apparatus according to any one of claims 1 to 6, wherein: the method comprises the following steps:

a. fixing the PCB: the two sides of the PCB are respectively clamped into accommodating grooves (4511) of four bottom plates (451), then the pressing plate (452) is turned over, under the action of the magnetic suction block (455), the pressing plate (452) fixes the PCB, then the connecting rod (43) is rotated to enable the PCB to be in a horizontal position, the positioning plate (46) is inserted into the positioning groove (441), and then the fastening bolt (431) is screwed;

b. mounting and clamping mechanism (4): supporting the connecting plate (42) at one end of the conveyor belt (3), and inserting the positioning lugs (31) into the corresponding positioning grooves (421);

c. dispensing: the conveying belt (3) drives the clamping mechanism (4) to convey forwards, the PCB is conveyed to the lower part of the dispensing machine, under the action of the dispensing machine, the printing glue is printed at the corresponding position on the PCB, and the printing glue is one of solder paste and red glue;

d. and (4) checking: after dispensing, the conveying belt (3) conveys the PCB out of the lower part of the dispenser, the dispensing position and the dispensing are checked, the next operation is carried out after the PCB is qualified, and the dispensing is carried out again after unqualified products are cleaned and blown;

e. component mounting: the PCB after the glue dispensing is qualified is conveyed to the lower part of a chip mounter by a conveyor belt (3) to carry out component mounting;

f. reflow soldering: conveying the mounted PCB to a reflow soldering furnace for reflow soldering under the action of a conveyor belt (3), and soldering components on the PCB;

AOI test: conveying the welded PCB to an AOI (automated optical inspection) detector for detection, carrying out the next operation on qualified products, and carrying out defective product maintenance on unqualified products;

h. turning the paster: and (3) taking the PCB qualified by AOI detection together with the clamping mechanism (4) off the conveyor belt (3), unscrewing the fastening bolt (431), pulling the positioning plate (46) out of the positioning groove (441), turning the PCB by 180 degrees, repeating the steps a to g, and finishing the paster processing of the PCB.

Technical Field

The invention relates to the technical field of SMT (surface mount technology) patching, in particular to an SMT patching process and a conveying device applied to the SMT patching process.

Background

SMT paster refers to the abbreviation of a series of process flows processed on the basis of a PCB, the PCB is a printed circuit board, and SMT is a surface mount technology, which is a technology and a process that are popular in the electronic group leader industry.

Generally speaking mainly through the flow of some glue, part dress, reflow soldering, AOI optical detection, maintenance and branch board when carrying out SMT paster, in the middle of the flow of current SMT paster, all need send the PCB board to next station through the mode that the manual work forwarded after not going through one-step operation and operate, in the middle of the process of transmitting, the slope of PCB board appears easily to lead to glue and part that print on PCB board to appear offset easily, thereby influence the quality of paster.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide an SMT chip mounting process and a conveying device applied to the SMT chip mounting process.

In order to achieve the purpose, the invention provides the following technical scheme: a conveying device comprises two vertical plates which are vertically arranged and are parallel to each other, supporting legs which are fixedly connected to the bottoms of the two ends of two supporting plates, a plurality of rotating rollers which are rotatably connected to one sides, close to each other, of the two supporting plates, a motor which is fixedly connected to the supporting plates and is used for driving one of the rotating rollers to rotate, conveying belts which are sleeved on the rotating rollers and clamping mechanisms which are supported on the two conveying belts;

the top surfaces of the conveyor belts are horizontally arranged, the clamping mechanism comprises support rods, connecting rods, support plates and clamping jaws, the two ends of each support rod are respectively supported at the tops of the two conveyor belts, the connecting rods are arranged on the two support rods, the support plates are fixedly connected to the sides, close to each other, of the two connecting rods, the clamping jaws are arranged on the sides, close to each other, of the two support plates and are positioned at the two ends of the support plates, and the;

the supporting plate is horizontally arranged.

Through adopting above-mentioned technical scheme, the clamping jaw is lived with PCB board clamp, through the support of backup pad and the centre gripping of clamping jaw for the PCB board can be in horizontal position all the time in the middle of the process of carrying out the transportation, thereby makes the skew that the position appears in the middle of the process of transporting all is difficult to glue on the PCB board and components and parts on the PCB board.

The invention is further configured to: the clamping jaw comprises a horizontally arranged bottom plate fixedly connected to the connecting rod and a pressing plate rotatably connected to the bottom plate;

the storage tank has been seted up along vertical direction to the one end that the bottom plate top deviates from the connecting rod, the both sides that the clamp plate is close to connecting rod one end all are provided with the fixed cover of fixed connection on the bottom plate, be provided with in the fixed cover and rotate with fixed cover and be connected and the pivot of fixed connection on the clamp plate, the recess that is located between fixed cover and the storage tank is seted up at the bottom plate top, be provided with fixed connection on the bottom plate and can adsorb the magnetism piece together with.

Through adopting above-mentioned technical scheme, rotate the clamp plate and make clamp plate and bottom plate break away from each other, then all block into four recesses with the both sides of PCB board in the middle of, then rotate the clamp plate for clamp plate and bottom plate are laminated each other, and under the effect of magnetism piece of inhaling, the clamp plate can compress tightly on the PCB board, realizes the fixed to the PCB board.

The invention is further configured to: the connecting rod runs through the bracing piece along length direction, and the connecting rod rotates to be connected on the bracing piece, and bracing piece pole top threaded connection has fastening bolt, and fastening bolt's bottom one end stretches into in the bracing piece and the outside of connecting rod contacts each other.

Through adopting above-mentioned technical scheme, through rotating the connecting rod, after the one side paster of PCB board is accomplished, need not to detach the PCB board from fixture, only need unscrew fastening bolt, directly with the rotatory 180 of PCB board, can paste the dress to the another side of PCB board for operation convenient and fast more.

The invention is further configured to: two one side that the backup pad deviates from each other all is provided with the locating plate that runs through the backup pad along conveyer belt direction of transfer, and the constant head tank of mutually supporting with locating plate one end is seted up to one side that two backup pads deviate from each other, and when the locating plate inserted in the constant head tank and was higher than the constant head tank and mutually supported, the PCB board level of centre gripping on the clamping jaw set up.

Through adopting above-mentioned technical scheme, through setting up locating plate and constant head tank for the level setting is kept that the PCB board can be better.

The invention is further configured to: the conveyer belt outside fixedly connected with a plurality of location lugs, the position that the backup pad is close to both ends each other one side is provided with the connecting plate, and the both ends of connecting plate are all fixed connection in the backup pad, and a plurality of positioning groove of mutually supporting with the location lug is seted up to the connecting plate bottom.

Through adopting above-mentioned technical scheme, through the cooperation of location lug and positioning groove for the skew of the difficult emergence position in the middle of the process that the connecting plate was carried on the conveyer belt.

The invention is further configured to: the pressing plate is close to one side of the accommodating groove and is fixedly connected with an elastic cushion located at one end, deviating from the supporting plate, of the pressing plate.

Through adopting above-mentioned technical scheme, through setting up the elasticity point, when clamp plate and PCB board contacted each other, can prevent that the PCB board from causing the damage to the clamp plate.

Another object of the present invention is to provide an SMT mounting process, which does not cause position deviation of glue and components due to transportation of a PCB when mounting is performed, the process comprising the following steps:

a. fixing the PCB: the two sides of the PCB are respectively clamped into the containing grooves of the four bottom plates, then the pressing plate is turned over, under the action of the magnetic suction block, the pressing plate fixes the PCB, then the connecting rod is rotated to enable the PCB to be in a horizontal position, the positioning plate is inserted into the positioning groove, and then the fastening bolt is screwed down;

b. installing a clamping mechanism: supporting the connecting plate at one end of the conveyor belt, and inserting the positioning lugs into the corresponding positioning grooves;

c. dispensing: the conveying belt drives the clamping mechanism to convey forwards, the PCB is conveyed to the position below the dispensing machine, under the action of the dispensing machine, the printing glue is printed on the corresponding position on the PCB, and the printing glue is one of solder paste and red glue;

d. and (4) checking: after dispensing, the conveying belt conveys the PCB out of the lower part of the dispenser, the dispensing position and the dispensing are checked, the next operation is carried out after the PCB is qualified, and the dispensing is carried out again after unqualified products are cleaned and blown;

e. component mounting: conveying the PCB subjected to qualified dispensing to the lower part of a chip mounter by a conveying belt for mounting components;

f. reflow soldering: conveying the mounted PCB to a reflow soldering furnace for reflow soldering under the action of a conveyor belt, and soldering components on the PCB;

AOI test: conveying the welded PCB to an AOI (automated optical inspection) detector for detection, carrying out the next operation on qualified products, and carrying out defective product maintenance on unqualified products;

h. turning the paster: and C, taking down the PCB after the AOI detection is qualified together with the clamping mechanism from the conveyor belt, unscrewing the fastening bolt, pulling out the positioning plate from the positioning groove, turning the PCB by 180 degrees, repeating the steps a to g, and finishing the paster processing of the PCB.

Through adopting above-mentioned technical scheme, the clamping jaw is lived with PCB board clamp, through the support of backup pad and the centre gripping of clamping jaw for the PCB board can be in horizontal position all the time in the middle of the process of carrying out the transportation, thereby makes the skew that the position appears in the middle of the process of transporting all is difficult to glue on the PCB board and components and parts on the PCB board.

In summary, compared with the prior art, the invention has the following beneficial effects:

1. according to the invention, the clamping jaw and the conveyor belt are arranged, the PCB is clamped by the clamping jaw, and the PCB can be always in a horizontal position in the transportation process through the support of the supporting plate and the clamping of the clamping jaw, so that the glue on the PCB and the components on the PCB are not easy to shift in position in the transportation process;

2. according to the invention, the connecting rod is rotatably connected to the supporting rod, the connecting rod is rotated, after one surface of the PCB is pasted, the PCB does not need to be detached from the clamping mechanism, and the other surface of the PCB can be pasted by directly rotating the PCB for 180 degrees by unscrewing the fastening bolt, so that the operation is more convenient and faster.

Drawings

FIG. 1 is an isometric view of the complete structure of the embodiment;

FIG. 2 is an enlarged view of portion A of FIG. 1;

FIG. 3 is an enlarged view of the portion B of FIG. 2;

FIG. 4 is a schematic diagram of an embodiment of an elastic cushion.

In the figure: 1. a vertical plate; 11. supporting legs; 12. a reinforcing rod; 2. a rotating roller; 21. a motor; 3. a conveyor belt; 31. positioning the bump; 4. a clamping mechanism; 41. a support bar; 42. a connecting plate; 421. a positioning groove; 43. a connecting rod; 431. fastening a bolt; 44. a support plate; 441. positioning a groove; 45. a clamping jaw; 451. a base plate; 4511. a containing groove; 4512. a groove; 452. pressing a plate; 4521. an elastic pad; 453. a rotating shaft; 454. fixing a sleeve; 455. a magnetic block; 46. and (7) positioning the plate.

Detailed Description