CN217942123U

CN217942123U - BGA tin scraping machine

Info

Publication number: CN217942123U
Application number: CN202221798080.6U
Authority: CN
Inventors: 梁志祥; 张慧玲
Original assignee: Shenzhen Zhuohuixin Technology Co ltd
Current assignee: Shenzhen Zhuohuixin Technology Co ltd
Priority date: 2022-07-13
Filing date: 2022-07-13
Publication date: 2022-12-02
Anticipated expiration: 2032-07-13

Abstract

The utility model discloses a BGA tin scraping machine, the on-line screen storage device comprises a base, the base up end is provided with quick-witted case and table surface, machine case sets up in table surface one side, table surface's the fixed bolster that sets up in both sides, the position at four angles of fixed bolster all sets up a steel mesh fixed briquetting, the steel mesh frame is fixed in the bottom of four steel mesh fixed briquetting, be the steel mesh in the middle of the steel mesh frame, be located and install base drive assembly on the base of steel mesh frame bottom, it is provided with the base to slide on the base drive assembly, a template chamber has on the base, the template intracavity sets up the die block, the die block upper end is provided with the chip positioning groove, the chip sets up in the chip positioning groove, just be provided with the corresponding steel mesh on the steel mesh of chip positioning groove. The utility model discloses an automatic tin scraping mode, each parameter is adjustable, can effectively promote the tin scraping quality, promotes tin scraping efficiency, promotes the security scheduling problem of tin scraping in-process, can bring bigger economic benefits for the enterprise.

Description

BGA tin scraping machine

Technical Field

The utility model relates to a tin scraping machine, concretely relates to BGA tin scraping machine.

Background

Chip adds man-hour, need carry out the tin scraping action to it, the tin scraping mode that tradition was right is artifical tin scraping to the chip, and artifical tin scraping is inefficient, and intensity of labour is big, so some semi-automatic or full-automatic tin scraping machine have invented at present, but these tin scraping machine add man-hour, can appear following problem:

in the tin scraping process, if the chip is required to be replaced, the lower template needs to be detached, the fixing structure needs to be loosened, the dismounting is troublesome, the positioning difficulty of the steel mesh is high, the poor mounting and positioning precision of the steel mesh influences the tin scraping quality, and the operation is very complex. The chip is generally only positioned and clamped, displacement is easily generated in the tin scraping process, if a positioning structure is arranged, the chip is possibly damaged, the structural design of the scraper is unreasonable, and the tin scraping force is inconvenient to adjust, so that the situations of uneven tin scraping, repeated tin scraping and the like are easily caused; in addition, the whole equipment is started without a safety mechanism, the equipment can be started as long as a switch is opened, misoperation is easy to occur, potential safety hazards exist, the base is inconvenient to adjust, and the situation that tin scraping repeated precision is poor is easy to occur.

Disclosure of Invention

The utility model aims to solve the technical problem that a BGA tin scraping machine adopts an automatic tin scraping equipment, through adopting various reasonable structural design, can effectively solve a series of problems that present automatic tin scraping appears for tin scraping efficiency promotes, and the yields promotes greatly, reduces the loss.

The utility model discloses a realize through following technical scheme: a BGA tin scraping machine comprises a base, wherein a machine case and a workbench surface are arranged on the upper end surface of the base, the machine case is arranged on one side of the workbench surface, a fixing support is fixedly arranged on two sides of the workbench surface, steel mesh fixing press blocks are arranged at the positions of four corners of the fixing support, a steel mesh frame is fixed at the bottoms of the four steel mesh fixing press blocks, a steel mesh is arranged in the middle of the steel mesh frame, a base driving assembly is arranged on the base positioned at the bottom of the steel mesh frame, the base is arranged on the base driving assembly in a sliding manner, a template cavity is formed in the base, a bottom die is arranged in the template cavity, a chip positioning groove is formed in the upper end of the bottom die, a chip is arranged in the chip positioning groove, and corresponding steel mesh holes are formed in the steel mesh which is opposite to the chip positioning groove;

be provided with the location module between steel mesh frame and die block, the base, the steel mesh frame compresses tightly the location through steel mesh fixed pressing block, and the top that is located the steel mesh frame is provided with scrapes the tin subassembly, the quick-witted incasement is provided with main control system, and quick-witted case one side of working table face is provided with a horizontal slip table subassembly relatively, scrapes the tin unit mount on horizontal slip table subassembly, does horizontal reciprocating motion and utilizes to scrape the tin subassembly and do to scrape the tin action for the chip on the steel mesh surface through the drive of horizontal slip table subassembly.

As a preferred technical scheme, the positioning module adopts alignment pins, alignment holes are formed in the positions of four corners of the steel mesh and the bottom die, the alignment pins are inserted into the alignment holes, the alignment pins are aligned and pulled out, the pulled alignment holes are sealed by using adhesive paper, and after alignment is completed, a gap cavity of 0.5-1.5mm is formed between the steel mesh and the upper end surface of the bottom die.

As preferred technical scheme, the position at four angles of base all is provided with a distance adjusting screw, and distance adjusting screw top and steel mesh frame lower extreme face contact support adjust the size of the clearance chamber between steel mesh and the base through distance adjusting screw.

As an optimized technical scheme, a base jacking cylinder is arranged at the bottom of the base, the base jacking cylinder jacks up the base to conduct tin scraping action, and the base jacking cylinder is controlled to be turned on and turned off through a starting switch.

As an optimized technical scheme, a base front-back deviation adjusting screw is arranged on one side of a base driving assembly, the base driving assembly adopts a rodless cylinder, and the base front-back deviation adjusting screw is arranged on one side of the rodless cylinder and used for adjusting the front-back deviation position of the base.

According to the preferable technical scheme, a plurality of vacuum suction holes are formed in the bottom surface of a template cavity of the base, the bottom of the template is adsorbed in a negative pressure mode through the vacuum suction holes, a vacuum negative pressure assembly is arranged in the base, and the vacuum negative pressure assembly is used for generating negative pressure suction force on the vacuum suction holes.

According to a preferable technical scheme, the tin scraping assembly comprises a tin scraping rocker arm, a sliding table mounting framework, a rocker arm connecting piece and a tin scraping knife mounted at the output end of the tin scraping rocker arm, and the tin scraping rocker arm is mounted on the transverse sliding table assembly through the sliding table mounting framework and the rocker arm connecting piece;

horizontal slip table subassembly adopts the horizontal driving motor who installs on the lead screw, scrapes the tin rocking arm through horizontal driving motor drive and does the action of horizontal reciprocal tin scraping, scrape the articulated installation of tin rocking arm on rocker arm connecting piece, what adjust about the rocker arm connecting piece installs on slip table installation skeleton, the top of slip table installation skeleton is provided with tin scraping sword down force degree regulation pole, scrapes the tin rocking arm and installs on scraping tin sword down force degree regulation pole, scrapes tin sword down force degree regulation pole threaded mounting on slip table installation skeleton, and one side of rocker arm connecting piece is provided with tin scraping sword rocking arm locking screw, through scraping tin sword rocking arm locking screw edgewise locking articulate the tin rocking arm of scraping in rocker arm connecting piece.

As the preferred technical scheme, the case is provided with an emergency stop switch, a switching power supply, a network aligning key, a reset key, a vacuum negative pressure meter and a motor speed regulation panel.

As a preferred technical scheme, a pedal suction switch interface, a power supply interface, an air inlet switch, a pressure regulating valve and an air pressure display meter are further arranged on the side surface of the case, the air inlet interface is connected with positive air pressure required by the machine, the air inlet switch is used for controlling the on-off of the air pressure, the pressure regulating valve is used for regulating the air pressure of the machine, the air pressure display meter is used for displaying the air pressure value actually used by the machine, and the pedal suction switch interface is connected with the pedal suction switch.

As a preferred technical scheme, the vacuum control system further comprises a machine starting inductive switch, and when the vacuum negative pressure value reaches the adjusting value, the machine starting inductive switch is used for controlling the whole machine to be started.

The utility model has the advantages that: the utility model adopts the screw rod lead screw motor to scrape tin, the operation is accurate, the speed is adjustable, only the bottom template and the steel mesh need to be replaced when different specifications of the chip are replaced, the operation is simple, the steel mesh alignment only needs four positioning pins, the jack alignment is simple, the operation is simple, the complex adjustment is not needed, the adoption is simple, the chip is fixed in a low-power-consumption vacuum suction mode, the weight is light, the noise is avoided, the chip is not damaged, the elastic damage-prevention chip scraper is equipped, and the utility model is suitable for various chips to be processed; the machine is provided with a vacuum negative pressure identification starting function, so that misoperation is avoided; just the utility model discloses an adjustable overdraft of scraper solves the not clean problem of tin scraping, can adjust skew screw around the base, promotes the repeatability of tin scraping.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is an overall side view of the present invention;

FIG. 3 is a schematic view of the bottom mold, the base and the steel mesh of the present invention;

fig. 4 is a top view of the bottom die of the present invention;

fig. 5 is a schematic structural view of the utility model with the casing removed;

FIG. 6 is a schematic structural view of the present invention with the base removed;

fig. 7 is a schematic front structural view of the present invention.

Detailed Description

All of the features disclosed in this specification, or all of the steps in any method or process so disclosed, may be combined in any combination, except combinations of features and/or steps that are mutually exclusive.

Any feature disclosed in this specification (including any accompanying claims, abstract and drawings), may be replaced by alternative features serving equivalent or similar purposes, unless expressly stated otherwise. That is, unless expressly stated otherwise, each feature is only an example of a generic series of equivalent or similar features.

As shown in fig. 1, the utility model discloses a BGA tin scraper, including a bottom plate 8, the up end of bottom plate 8 is provided with machine case 7 and table surface, machine case 7 sets up in table surface one side, table surface's both sides are fixed and are set up a fixed bolster 9, the position of four angles of fixed bolster 9 all sets up a steel mesh fixed briquetting 10, steel mesh frame 15 is fixed in the bottom of four steel mesh fixed briquetting 10, steel mesh 1 is in the middle of steel mesh frame 15, install base drive assembly 13 on the base that lies in steel mesh frame 15 bottom, it is provided with base 5 to slide on the base drive assembly 13, base 5 has a template chamber 12, set up bottom die 3 in the template chamber 12, bottom die 3 upper end is provided with chip positioning slot 311, chip 2 sets up in chip positioning slot 311, be provided with the corresponding steel mesh on the steel mesh 1 to chip positioning slot 311;

be provided with the location module between steel mesh frame 15 and die block 3, the base 5, steel mesh frame 15 compresses tightly the location through steel mesh fixed pressing block 10, and the top that is located steel mesh frame 15 is provided with scrapes the tin subassembly, be provided with the main control system in the quick-witted case 7, quick-witted case 7 relative table surface one side is provided with a horizontal slip table subassembly, scrapes the tin unit mount on horizontal slip table subassembly, does horizontal reciprocating motion and utilizes to scrape the tin subassembly and do to scrape the tin action for the chip on steel mesh 1 surface through the drive of horizontal slip table subassembly.

As shown in fig. 3 and 4, alignment holes 312 are formed at four corners of the steel mesh 1 and the bottom mold 3, alignment pins 4 are inserted into the alignment holes 312, the alignment pins 4 are aligned and pulled out, the pulled alignment holes are sealed by using gummed paper, and after alignment is completed, a clearance cavity h of 1-1.5mm is formed between the steel mesh 1 and the upper end surface of the bottom mold 3.

The bottom die is a template chip positioning groove and steel mesh arrangement data which are common for tin scraping and ball dropping and are required to be consistent;

steel mesh: the specification of the tin scraping steel mesh is as follows: 0.05MM, 0.08MM, 0.1MM, 0.15MM and 0.2 MM; the specification of the ball sweeping steel mesh is as follows: 0.12, 0.15, 0.2MM, 0.25MM, 0.3MM, 0.35MM.

As shown in fig. 3, distance adjusting screws 6 are arranged at the four corners of the base, the top of each distance adjusting screw 6 is in contact with the lower end face of the steel mesh frame 15 for supporting, the size of a clearance cavity between the steel mesh 1 and the base 5 is adjusted through the distance adjusting screws 6, the distance adjusting screws are used for adjusting the distance between the steel mesh and the base to ensure the mesh-off effect of the chip, and the four screws ensure the adjustment balance during adjustment to ensure that the chip on the bottom die and the steel mesh keep a parallel clearance of 1-1.5 MM.

As shown in fig. 6 and 7, a base jack cylinder 27 is provided at the bottom of the base 5, the base jack cylinder 27 jacks up the base 5 to perform a tin scraping operation, and the base jack cylinder 27 is controlled to be turned on and off by a start switch. The base is controlled to ascend and descend, and after all conditions of the equipment meet set values, the induction starting switch is triggered, and the cylinder jacks up the template on the base to scrape tin.

As shown in fig. 6, a base forward and backward offset adjusting screw 25 is disposed on one side of the base driving assembly, the base driving assembly adopts a rodless cylinder 26, and the base forward and backward offset adjusting screw 25 is disposed on one side of the rodless cylinder 26 and is used for adjusting the forward and backward offset position of the base 5. When the tin scraping repeatability of the machine is poor, the two screws have different tightness, and the screws penetrate through screw holes with different lengths to cause left and right unbalance; when the base is not lifted to the top, the screw is too long or too short to penetrate, so that the lifting cylinder cannot lift to the center of the base.

As shown in fig. 1, a plurality of vacuum suction holes 14 are formed in the bottom surface of the template cavity of the base 5, the bottom of the template is sucked in a negative pressure manner through the vacuum suction holes, and a vacuum negative pressure assembly is arranged in the base and used for generating a negative pressure suction force to the vacuum suction holes.

As shown in fig. 1 and 5, the tin scraping assembly comprises a tin scraping rocker arm 24, a sliding table mounting framework 30, a rocker arm connecting piece 40 and a tin scraping knife 11 mounted at the output end of the tin scraping rocker arm, the tin scraping knife adopts an elastic scraper, and the tin scraping rocker arm 24 is mounted on the transverse sliding table assembly through the sliding table mounting framework 30 and the rocker arm connecting piece 40;

horizontal slip table subassembly adopts the horizontal driving motor 50 of installing on lead screw 31, scrapes tin rocking arm 24 through the drive of horizontal driving motor 50 and does the action of horizontal reciprocal tin scraping, scrape the articulated installation on rocker arm connecting piece 40 of tin rocking arm 24, the installation of adjusting about rocker arm connecting piece 40 on slip table installation skeleton 30, the top of slip table installation skeleton 30 is provided with scrapes tin sword down force degree regulation pole 22, scrapes tin rocking arm 24 and installs on scraping tin sword down force degree regulation pole 22, scrapes tin sword down force degree regulation pole 22 threaded mounting on slip table installation skeleton 30, and one side of rocker arm connecting piece 40 is provided with scrapes tin sword rocking arm locking screw 23, through scraping tin sword rocking arm locking screw 23 from the side locking articulate scraping tin rocking arm 24 in rocker arm connecting piece 40. The scraper down pressure degree adjusting rod 22 can adjust the force of the scraper pressing down on the steel mesh, when the tin scraping is not clean, the scraper down pressure degree is adjusted clockwise, and when the down pressure degree is too large, the down pressure degree is adjusted counterclockwise.

And a tin scraping knife rocker locking screw 23 is used for fixing the scraping arm, and is convenient to clean the scraper and adjust a steel mesh when being loosened and lifted.

As shown in fig. 1, the cabinet 7 is provided with an emergency stop switch 21, a switching power supply 18, a network connection key 17, a reset key 20, a vacuum negative pressure gauge 19 and a motor speed regulation panel.

As shown in fig. 2, the side of the chassis 7 is further provided with a pedal suction switch interface, a power supply interface, an air inlet interface 44, an air inlet switch 43, a pressure regulating valve 41 and an air pressure display meter 42, the air inlet interface 44 is connected to positive air pressure required by the machine, the air inlet switch 43 is used for controlling on-off of air pressure, the pressure regulating valve is used for regulating air pressure of the machine, the air pressure display meter 42 is used for displaying an air pressure value actually used by the machine, and the pedal suction switch interface is connected to the pedal suction switch;

wherein, the vacuum negative pressure gauge: adjusting the negative pressure value of the machine, and starting the machine when the negative pressure suction reaches the adjusted value;

pedal the switch of breathing in: when the switch is switched on, after the switch is stepped on by a foot, the chip is sucked by starting vacuum suction force, so that the chip is prevented from being popped up due to vibration when the thinner chip is pushed into the base;

the negative pressure meter setting method comprises the following steps: 1P is displayed by pressing the middle blue setting key 1 time, the size of the 1P starting negative pressure allowable trigger value is adjusted, 2P is displayed by pressing the middle blue setting key 2 time, the size of the 1P starting negative pressure allowable trigger value is adjusted, and the 1P and the 2P are required to be set simultaneously.

Resetting: when the machine is stopped suddenly, a reset key is pressed, and the scraper arm returns to the original point;

network pairing: when the key is pressed down, the base is pushed in to be started in an induction mode, the base is jacked up, and the scraper cannot scrape; when the steel mesh counterpoint is carried out to needs, press this button, loosen the scraper arm and lift up, loosen four steel mesh fixed pressing blocks, the base pushes away, the machine starts, find the counterpoint hole at four angles of steel mesh and die block, as shown in fig. 3, it is perpendicular to adjust messenger's steel mesh counterpoint hole and die block counterpoint hole, pass four angle counterpoint holes of steel mesh and base with 4 counterpoint needles, turn over tight four steel mesh pressing blocks after counterpointing, and extract the counterpoint needle, seal the counterpoint hole from the steel mesh bottom with the adhesive tape, loosen the button of counterpointing, the counterpoint is accomplished.

The vacuum control system further comprises a machine starting inductive switch, and when the vacuum negative pressure value reaches the adjusting value, the machine starting inductive switch is used for controlling the whole machine to be started.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that are not thought of through the creative work should be covered within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope defined by the claims.

Claims

1. A BGA tin scraping machine is characterized in that: the die comprises a bottom plate (8), a case (7) and a workbench surface are arranged on the upper end surface of the bottom plate (8), the case (7) is arranged on one side of the workbench surface, a fixing support (9) is fixedly arranged on two sides of the workbench surface, a steel mesh fixing press block (10) is arranged at each of four corners of the fixing support (9), a steel mesh frame (15) is fixed at the bottom of each steel mesh fixing press block (10), a steel mesh (1) is arranged in the middle of the steel mesh frame (15), a base driving assembly (13) is installed on a base positioned at the bottom of the steel mesh frame (15), a base (5) is arranged on the base driving assembly (13) in a sliding manner, a die plate cavity (12) is formed in the base (5), a bottom die (3) is arranged in the die plate cavity (12), a chip positioning groove (311) is arranged at the upper end of the bottom die (3), a chip (2) is arranged in the chip positioning groove (311), and a corresponding steel mesh is arranged on the steel mesh (1) facing the chip positioning groove (311);

be provided with the location module between steel mesh frame (15) and die block (3), base (5), steel mesh frame (15) compress tightly the location through steel mesh fixed pressing block (10), and the top that is located steel mesh frame (15) is provided with scrapes the tin subassembly, be provided with the main control system in quick-witted case (7), quick-witted case (7) relative table surface one side is provided with a horizontal slip table subassembly, scrapes the tin subassembly and installs on horizontal slip table subassembly, does horizontal reciprocating motion and utilizes the tin subassembly of scraping to do the tin action for the chip on steel mesh (1) surface through horizontal slip table subassembly drive.

2. The BGA tin scraper of claim 1, wherein: the location module adopts counterpoint needle, and the position of four angles of steel mesh (1) and die block (3) all is provided with counterpoint hole (312) to insert counterpoint needle (4) in counterpoint hole (312), counterpoint and extract after counterpoint needle (4), counterpoint hole after extracting utilizes the adhesive tape sealed, counterpoints the completion back, forms a 0.5-1.5 mm's clearance between steel mesh (1) and the die block (3) up end.

3. The BGA tin scraper of claim 1, wherein: the position at four angles of base all is provided with one apart from adjusting screw (6), and the terminal surface contact supports under distance adjusting screw (6) top and steel mesh frame (15), adjusts the size of the clearance chamber between steel mesh (1) and base (5) through apart from adjusting screw (6).

4. The BGA solder scraper of claim 1, wherein: the tin scraping device is characterized in that a base jacking cylinder (27) is arranged at the bottom of the base (5), the base jacking cylinder (27) jacks up the base (5) to scrape tin, the base jacking cylinder (27) is controlled to be opened by starting an inductive switch, and the base jacking cylinder is automatically closed after the action is finished, so that the base jacking and the descending are realized.

5. The BGA tin scraper of claim 1, wherein: base drive assembly one side is provided with skew adjusting screw (25) around the base, and base drive assembly adopts two at least rodless cylinders (26), and skew adjusting screw (25) set up in one side of rodless cylinder (26) around the base for adjust the skew position around base (5), whole pedestal mounting is at the power take off end of rodless cylinder.

6. The BGA tin scraper of claim 1, wherein: the vacuum suction device is characterized in that a plurality of vacuum suction holes (14) are formed in the bottom surface of a template cavity of the base (5), the bottom of the template is adsorbed through the vacuum suction holes in a negative pressure mode, a vacuum negative pressure assembly is arranged in the base, and negative pressure suction force is generated on the vacuum suction holes through the vacuum negative pressure assembly.

7. The BGA tin scraper of claim 1, wherein: the tin scraping assembly comprises a tin scraping rocker arm (24), a sliding table mounting framework (30), a rocker arm connecting piece (40) and a tin scraping knife (11) mounted at the output end of the tin scraping rocker arm, the tin scraping knife adopts an elastic scraper, and the tin scraping rocker arm (24) is mounted on the transverse sliding table assembly through the sliding table mounting framework (30) and the rocker arm connecting piece (40);

horizontal slip table subassembly adopts horizontal driving motor (50) of installing on lead screw (31), scrapes tin rocking arm (24) through horizontal driving motor (50) drive and does horizontal reciprocal tin scraping action, scrape tin rocking arm (24) and articulate and install on rocker arm connecting piece (40), the installation of adjusting from top to bottom in rocker arm connecting piece (40) is on slip table installation skeleton (30), the top of slip table installation skeleton (30) is provided with scrapes tin sword lower pressure degree regulation pole (22), scrapes tin rocking arm (24) and installs on scraping tin sword lower pressure degree regulation pole (22), scrapes tin sword lower pressure degree regulation pole (22) threaded mounting on slip table installation skeleton (30), and one side of rocker arm connecting piece (40) is provided with and scrapes tin sword rocking arm locking screw (23), through scraping tin sword rocking arm locking screw (23) from the side locking articulate tin rocking arm (24) of scraping in rocker arm connecting piece (40).

8. The BGA tin scraper of claim 1, wherein: the machine box (7) is provided with an emergency stop switch (21), a switching power supply (18), a network aligning key (17), a reset key (20), a vacuum negative pressure meter (19) and a motor speed regulation panel.

9. The BGA solder scraper of claim 1, wherein: the side face of the case (7) is further provided with a pedal air suction switch interface, a power supply interface, an air inlet interface (44), an air inlet switch (43), a pressure regulating valve (41) and an air pressure display meter (42), the air inlet interface (44) is connected with positive air pressure needed by the machine, the air inlet switch (43) is used for controlling the on-off of the air pressure, the pressure regulating valve is used for regulating the air pressure of the machine, the air pressure display meter (42) is used for displaying the air pressure value actually used by the machine, and the pedal air suction switch interface is connected with the pedal air suction switch.

10. The BGA solder scraper of claim 1, wherein: the vacuum negative pressure value is measured through the control host, and when the vacuum negative pressure value reaches an adjusting value, the machine is started through the machine start induction switch to control the whole start of the machine.