A track structure suitable for soft solder die bonding machine

Abstract

The present invention relates to a track structure suitable for a soft solder crystal bonding machine in the field of welding-related technical fields. The edge of the H-track is raised on the original H-track structure, and the original cover plate covering the H-track is changed into a splicing structure embedded in the track. When the mixed gas is filled, it can not only be evenly dispersed to the inner cavity of the H-shaped track, thereby forming protection on the surface of the frame, but also, due to the embedded cover plate, the mixed gas in the cavity is heated and rises linearly along the side, thereby filling the side contact surface of the H-shaped track and the embedded cover plate and forming a wind wall. Compared with the prior art, it effectively prevents air from entering the track cavity from the side, thereby delaying the oxidation of the copper frame in the track; in addition, with the setting of a segmented inflation pipe, while ensuring the stability of the hydrogen and nitrogen gas supply pipe, the leakage, blockage and the like of the hydrogen and nitrogen gas supply pipe can be monitored in real time, so that the abnormality of the hydrogen and nitrogen gas supply pipe can be discovered in time, thereby further protecting the copper frame in the cavity and making it less likely to be oxidized.

Description

Technical Field

[0001] The invention relates to a track structure, in particular to a track structure applicable to a soft solder crystal bonding machine and applied in the technical field related to welding. Background Art

[0002] In the production process of the existing soft solder bonding machine, the copper frame is easily oxidized quickly in the high-temperature track due to the influence of track deformation, hydrogen-nitrogen mixed gas ratio, gas consumption, window size on the cover plate, etc.

[0003] The specification of Chinese patent CN220407364U discloses an adjustable soft solder device. Although the edge of the track is wrapped by the lower end of the cover plate to provide sealing inside the track, thereby reducing the amount of air in the track, the contact surface between the track and the cover plate is in a turning state due to the external wrapping method, and the internal hydrogen-nitrogen mixture is difficult to continuously cover the contact surface between the cover plate and the track. Due to the sliding of the cover plate, the outside air will inevitably enter the track along the contact surface, causing oxidation of the copper frame. Summary of the invention

[0004] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is that the way in which the edge of the track is wrapped by the cover plate is difficult to isolate the outside air from entering the track through the gap between the cover plate and the track, causing oxidation of the copper frame.

[0005] In order to solve the above problems, the present invention provides a track structure suitable for a soft solder crystal bonding machine, comprising two bases, the upper ends of the two bases are fixedly connected with an H-shaped track, the upper end of the H-shaped track is drilled with an upper avoidance groove, the lower end of the upper avoidance groove is drilled with a lower avoidance groove, a plurality of embedded cover plates are embedded and clamped on the upper avoidance groove, a welding opening is drilled in the middle of the embedded cover plate located in the middle, a copper frame and a plurality of pads are placed on the lower avoidance groove, the copper frame is located directly below the welding opening, a lower gas storage groove is drilled in the middle of the upper end of the pad plate, a plurality of overflow holes are drilled on both sides of the upper end of the pad plate and the bottom of the lower gas storage groove, a gas storage cavity is drilled at the lower end of the pad plate, the gas storage cavity is communicated with the plurality of overflow holes, one end of the H-shaped track is also fixedly connected with an epitaxial plate, and the sliding cover on the epitaxial plate is provided with an outer covering plate;

[0006] A plurality of electric heating units are fixedly connected to the outer end of the H-shaped track, and the electric heating units include a hydrogen-nitrogen gas supply pipe, a heating rod and a thermocouple. The hydrogen-nitrogen gas supply pipe includes an inflation pipe located outside the H-shaped track, a deflation pipe fixedly extending into the H-shaped track, and a reverse connector connecting the inflation pipe and the deflation pipe. A plurality of deflation holes are drilled at the upper end of the deflation pipe, and the openings of the plurality of deflation holes are all facing the gas storage cavity and communicated with the gas storage cavity.

[0007] In the above-mentioned track structure suitable for soft solder die bonding machine, the edge of the H-track is raised on the original H-track structure, and the original cover plate covering the H-track is changed to a splicing structure embedded in the track. When the mixed gas is filled, it can not only be evenly dispersed to the inner cavity of the H-shaped track, thereby forming protection on the surface of the frame, but also due to the embedded cover plate, the mixed gas in the cavity will rise linearly along the side due to the heat, and then fill the side contact surface of the H-shaped track and the embedded cover plate to form a wind wall. Compared with the existing technology, it effectively prevents air from entering the track cavity from the side, thereby delaying the oxidation of the copper frame in the track.

[0008] As a further improvement of the present application, two air expansion grooves are opened at the bottom of the embedded cover plate, multiple air guide grooves are opened at the front and rear edges of the bottom of the embedded cover plate, and two rows of upper air storage grooves are opened at the bottom of the embedded cover plate. The two rows of upper air storage grooves and the multiple air guide grooves are all connected to the adjacent air expansion grooves.

[0009] As a further improvement of the present application, the inflation tube is arranged in two sections, and a pressure measuring ring is provided between the ends of the two sections of the air release holes that are close to each other. Mounting plates are fixedly connected to the left and right ends of the pressure measuring ring and between the ends opposite to the air release hole and the pressure measuring ring, and the two opposite mounting plates are connected by multiple bolts.

[0010] As another improvement of the present application, the reverse connecting head includes a reverse connecting pipe fixedly connected to a joint shell, a positioning ring and an end of the positioning ring close to the joint shell, an outwardly expanded threaded groove is bored on the inner wall of one end of the joint shell close to the positioning ring, the reverse connecting pipe is threadedly connected to the outwardly expanded threaded groove, and the pressure measuring ring is in conflict with the inner wall of the outwardly expanded threaded groove away from the positioning ring.

[0011] As another improved supplement of the present application, the inner diameters of the joint housing and the counter-connecting pipe are consistent with the outer diameter of the inflation pipe, and an end portion of the inflation pipe close to the outwardly expanded thread groove contacts the positioning ring.

[0012] As another improved supplement of the present application, the pressure measuring ring includes two positioning segments respectively contacting an adjacent section of an inflation tube and a pressure measuring segment fixedly connected between the two positioning segments. The middle portion of the pressure measuring segment contacts the inner wall of the outwardly expanded threaded groove, and an air pressure monitoring assembly is installed between the positioning ring and the pressure measuring ring.

[0013] As another improved supplement of the present application, the positioning section is a hard shaped structure, the pressure measuring section is an elastic sealing structure, and the middle part of the pressure measuring section is an arc-shaped protrusion toward the outside of the inflation tube.

[0014] As another improved supplement to the present application, the air pressure monitoring assembly includes a pressure sensor installed on the positioning ring near the end of the pressure measuring ring, a touch rod that movably penetrates two mounting plates corresponding to the pressure sensor, and an elastic element fixedly connected between the touch rod near the outer end of the pressure measuring ring and the mounting plate.

[0015] As another improvement supplement of the present application, when the touch rod is not subjected to force, both ends of the elastic element are not in contact with the pressure sensor and the pressure measuring section at the same time.

[0016] In summary, the edge of the H-rail is raised on the original H-rail structure, and the original cover plate covering the H-rail is changed to a spliced ​​structure embedded in the rail. When the mixed gas is filled, it can not only be evenly dispersed to the inner cavity of the H-shaped rail, thereby forming protection on the surface of the frame, but also due to the embedded cover plate, the mixed gas in the cavity is heated and will rise linearly along the side, thereby filling the side contact surface of the H-shaped rail and the embedded cover plate and forming a wind wall. Compared with the prior art, it effectively prevents air from entering the rail cavity from the side, thereby delaying the oxidation of the copper frame in the rail; in addition, with the setting of the segmented inflation pipe, while ensuring the stability of the hydrogen and nitrogen supply pipe, the leakage, blockage and other conditions of the hydrogen and nitrogen supply pipe can be monitored in real time, so that the mixed gas can be evenly, stably and continuously transported into the wall, thereby further protecting the copper frame in the cavity and making it less likely to be oxidized. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a three-dimensional diagram of the first embodiment of the present application;

[0018] Figure 2 for Figure 1 Schematic diagram at A in the middle;

[0019] Figure 3 It is a partial stereogram of the first embodiment of the present application;

[0020] Figure 4 This is a three-dimensional diagram of a cover plate according to a first embodiment of the present application;

[0021] Figure 5 This is a comparison diagram between the first embodiment of the present application and the prior art;

[0022] Figure 6 A three-dimensional diagram of a hydrogen-nitrogen gas supply pipe for a hydrogen-nitrogen mixed gas according to a first embodiment of the present application;

[0023] Figure 7 This is a partial cross-sectional view of a hydrogen and nitrogen gas supply pipe according to a second embodiment of the present application;

[0024] Figure 8 for Figure 7 Schematic diagram at B in the middle;

[0025] Fig. 9 A partial schematic diagram of a two-section inflation tube according to a second embodiment of the present application;

[0026] Fig.10 This is a comparison diagram of the cross-sectional changes of the inflation tube of the second embodiment of the present application before and after inflation.

[0027] Description of the numbers in the figure:

[0028] 1 H-shaped track, 101 upper avoidance groove, 102 lower avoidance groove, 2 base, 3 embedded cover plate, 301 air guide groove, 302 air expansion groove, 303 upper air storage groove, 4 pad plate, 41 extension plate, 42 outer cover plate, 401 lower air storage groove, 402 overflow hole, 5 hydrogen and nitrogen gas supply pipe, 51 inflation pipe, 52 deflation pipe, 501 deflation hole, 502 external expansion thread groove, 6 heating rod, 7 thermocouple, 8 anti-connector, 81 connector shell, 82 positioning ring, 83 anti-connector, 9 pressure measuring ring, 91 positioning section, 92 pressure measuring section, 93 mounting plate, 10 pressure sensor, 11 touch rod, 12 elastic element. DETAILED DESCRIPTION

[0029] Two implementation modes of the present application are described in detail below with reference to the accompanying drawings.

[0030] The first implementation method:

[0031] Figure 1-Figure 3 The track structure suitable for a soft solder die bonding machine is shown, comprising two bases 2, the upper ends of the two bases 2 are fixedly connected with an H-shaped track 1, the upper end of the H-shaped track 1 is cut with an upper avoidance groove 101, compared with the prior art cover plate and track outer wrapping connection method, in this scheme, the upper edge of the H-shaped track 1 is heightened, and the heightened part forms an upper avoidance groove 101, so that the embedded cover plate 3 is embedded in the upper avoidance groove 101, and a lower avoidance groove 102 is cut at the bottom end of the upper avoidance groove 101, and a plurality of embedded cover plates 3 are embedded and connected on the upper avoidance groove 101. The cover plate 3, the embedded cover plate 3 located in the middle is provided with a welding opening in the middle, a copper frame and a plurality of pads 4 are placed on the lower avoidance groove 102, the copper frame is located directly below the welding opening, a lower gas storage groove 401 is provided in the middle of the upper end of the pad plate 4, a plurality of overflow holes 402 are provided on both sides of the upper end of the pad plate 4 and the bottom of the lower gas storage groove 401, a gas storage cavity is provided at the lower end of the pad plate 4, and the gas storage cavity is communicated with the plurality of overflow holes 402, one end of the H-shaped track 1 is also fixedly connected with an extension plate 41, and a sliding cover on the extension plate 41 is provided with an outer cover plate 42;

[0032] The outer end of the H-shaped track 1 is fixedly connected to a plurality of electric heating units, which include a hydrogen and nitrogen gas supply pipe 5, a heating rod 6 and a thermocouple 7. Figure 6The hydrogen-nitrogen gas supply pipe 5 includes an inflation pipe 51 located outside the H-shaped track 1, a deflation pipe 52 fixedly extending into the H-shaped track 1, and a reverse connector 8 connecting the inflation pipe 51 and the deflation pipe 52. A plurality of deflation holes 501 are drilled on the upper end of the deflation pipe 52. The mouths of the plurality of deflation holes 501 are all facing the gas storage cavity and communicated with the gas storage cavity, so that when the mixed gas is filled, the mixed gas first diffuses into the gas storage cavity along the plurality of deflation holes 501, and then can evenly overflow into the lower gas storage tank 401 and the cavity of the H-shaped track 1 through the plurality of overflow holes 402, and diffuse in the cavity of the H-shaped track 1, thereby playing a uniform protective role on the surface of the copper frame.

[0033] like Figure 4 Two air expansion grooves 302 are drilled at the bottom of the embedded cover plate 3, and multiple air guide grooves 301 are drilled at the front and rear edges of the bottom of the embedded cover plate 3. Two rows of upper air storage grooves 303 are also drilled at the bottom of the embedded cover plate 3. The two rows of upper air storage grooves 303 and the multiple air guide grooves 301 are all connected to the adjacent air expansion grooves 302. When the mixed gas enters the cavity of the H-shaped track 1, it will also enter and fill the air guide grooves 301, the air expansion grooves 302 and the upper air storage grooves 303. At the same time, under the high temperature environment of the H-shaped track 1, the heated mixed gas will go up and then seep out along the air guide grooves 301 toward the edge between the H-shaped track 1 and the embedded cover plate 3. Through the setting of the air guide grooves 301, a stable channel can be provided for the external diffusion of the mixed gas, so as to form a wind wall in the gap at the contact point of the H-shaped track 1 and the embedded cover plate 3, thereby effectively preventing the outside air from infiltrating from there, thereby effectively delaying the oxidation of the copper frame in the track.

[0034] In summary, if Figure 5 The edge of the H-rail is raised on the original H-rail structure, and the original cover plate covering the H-rail is changed to a splicing structure embedded in the rail. When the mixed gas is filled, it can not only be evenly dispersed to the inner cavity of the H-shaped rail 1, thereby forming protection on the surface of the frame, but also due to the embedded cover plate, the mixed gas in the cavity will rise linearly along the side due to the heat, and then fill the side contact surface of the H-shaped rail 1 and the embedded cover plate 3 to form a wind wall. Compared with the existing technology, it effectively prevents air from entering the rail cavity from the side, thereby delaying the oxidation of the copper frame in the rail.

[0035] The second implementation method:

[0036] This embodiment is based on the first embodiment, and the arrangement of the inflation tube 51 is changed, while the rest of the parts remain the same as the first embodiment.

[0037] Figure 7As shown, the inflation tube 51 is arranged in two sections, and a pressure measuring ring 9 is provided between the ends of the two sections of the venting holes 501 that are close to each other. The left and right ends of the pressure measuring ring 9 and the ends opposite to the venting holes 501 and the pressure measuring ring 9 are fixedly connected with mounting plates 93, and the two opposite mounting plates 93 are connected by multiple bolts.

[0038] The reverse connector 8 includes a reverse connector 83 fixedly connected to a joint housing 81, a positioning ring 82, and an end of the positioning ring 82 near the joint housing 81. An outwardly expanding thread groove 502 is cut into the inner wall of the end of the joint housing 81 near the positioning ring 82. The reverse connector 83 is threadedly connected to the outwardly expanding thread groove 502. The pressure measuring ring 9 contacts the inner wall of the outwardly expanding thread groove 502 away from the positioning ring 82. The inner diameters of the joint housing 81 and the reverse connector 83 are consistent with the outer diameter of the inflation tube 51. An end of the inflation tube 51 near the outwardly expanding thread groove 502 is connected to the positioning ring 82. The positioning rings 82 are in contact with each other, wherein the inflation tube 51 is reversely inserted into the joint shell 81 and only contacts with the joint shell 81 without being fixed. The pressure measuring ring 9 and the outwardly expanded threaded groove 502 are limited by interference, and the reverse connecting tube 83 is threadedly connected with the joint shell 81, so as to fix the position of the inflation tube 51 and the reverse connecting head 8. In this connection mode, the inflation tube 51 is not directly connected with the joint shell 81, thereby effectively protecting the inflation tube 51 from damage and leakage due to excessive extrusion, thereby effectively ensuring its service life.

[0039] like Figure 8-Figure 9 The pressure measuring ring 9 includes two positioning sections 91 that are respectively in contact with an adjacent section of the inflation tube 51 and a pressure measuring section 92 that is fixedly connected between the two positioning sections 91. The middle of the pressure measuring section 92 is in contact with the inner wall of the outwardly expanded threaded groove 502. An air pressure monitoring assembly is installed between the positioning ring 82 and the pressure measuring ring 9. The air pressure monitoring assembly includes a pressure sensor 10 installed at the end of the positioning ring 82 near the pressure measuring ring 9, a feeler rod 11 that movably penetrates two mounting plates 93 corresponding to the pressure sensor 10, and an elastic element 12 that is fixedly connected between the outer end of the feeler rod 11 near the pressure measuring ring 9 and the mounting plate 93. The elastic element 12 is mainly used to assist the reset of the feeler rod 11. It is preferably a compression spring so that when the thrust of the pressure measuring section 92 is lost, it can drive the feeler rod 11 to reset, so that the data of the pressure sensor 10 disappears; the positioning section 91 is a hard and fixed structure, the pressure measuring section 92 is an elastic sealing structure, and the middle of the pressure measuring section 92 is an arc-shaped protrusion facing the outside of the inflation tube 51, such as Fig.10When the mixed gas is filled, due to the gas compression, the arc portion of the pressure measuring section 92 in contact with the outwardly expanding thread groove 502 will first deform, thereby increasing the contact area with the inner wall of the outwardly expanding thread groove 502, which can improve the sealing effect. At the same time, the side of the pressure measuring section 92 will bulge outward and squeeze the feeler rod 11 of the air pressure monitoring component, so that it gradually approaches the pressure sensor 10 and squeezes it, so that it generates force data. When the deflation pipe 52 is blocked, at the same inflation speed, the air pressure at the pressure measuring section 92 will increase, causing the data on the pressure sensor 10 to increase significantly, and The greater the increase, the more serious the blockage; and when there are other leakage areas except the multiple vent holes 501, at the same inflation speed, the air pressure at the pressure measuring section 92 will decrease, causing the data on the pressure sensor 10 to decrease, and the greater the decrease, the more serious the leakage. Based on the data changes of the pressure sensor 10, real-time monitoring of leakage and blockage of the hydrogen-nitrogen gas supply pipe 5 can be achieved, thereby effectively ensuring a stable supply of mixed gas in the H-shaped track 1, thereby effectively protecting the metal frame from oxidation, and effectively ensuring the smooth progress of the solid crystal process, and improving the solid crystal quality.

[0040] In addition, it is worth noting that, in specific implementation, technicians can adjust the elasticity of the pressure measuring section 92 according to the actual gas supply demand of the hydrogen-nitrogen mixture through multiple experiments, so that under a normal and stable gas supply speed, the deformation of the pressure measuring section 92 is sufficient to push the feeler rod 11 to make it contact with the pressure sensor 10, and the pressure sensor 10 generates force data.

[0041] When the feeler rod 11 is not subjected to force, both ends of the elastic element 12 are not in contact with the pressure sensor 10 and the pressure measuring section 92 at the same time, so that when not inflated, no force data is generated at the pressure sensor 10.

[0042] In addition, with the provision of the segmented gas filling pipe 51, under the condition of ensuring the stability of the hydrogen-nitrogen gas supply pipe 5, the leakage, blockage and the like of the hydrogen-nitrogen gas supply pipe 5 can be monitored in real time, so that the mixed gas can be evenly, stably and continuously transported into the wall, thereby further protecting the copper frame in the cavity and making it less likely to be oxidized.

[0043] In view of current practical needs, the above-mentioned implementation mode adopted in this application is not limited to the scope of protection. Various changes made within the knowledge scope of technical personnel in this field without departing from the concept of this application still fall within the scope of protection of the present invention.

Claims

1. A track structure suitable for a soft solder die bonding machine, characterized in that: The invention comprises two bases (2), the upper ends of the two bases (2) are fixedly connected to an H-shaped track (1), the upper end of the H-shaped track (1) is bored with an upper avoidance groove (101), the inner bottom end of the upper avoidance groove (101) is bored with a lower avoidance groove (102), a plurality of embedded cover plates (3) are embedded and clamped on the upper avoidance groove (101), a welding opening is bored in the middle of the embedded cover plate (3) located in the middle, a copper frame and a plurality of pads (4) are placed on the lower avoidance groove (102), and the The copper frame is located directly below the welding port, a lower gas storage tank (401) is formed in the middle of the upper end of the pad (4), multiple overflow holes (402) are formed on both sides of the upper end of the pad (4) and the bottom of the lower gas storage tank (401), a gas storage cavity is formed at the lower end of the pad (4), the gas storage cavity is communicated with the multiple overflow holes (402), one end of the H-shaped track (1) is also fixedly connected to an extension plate (41), and the upper sliding cover of the extension plate (41) is provided with an outer cover plate (42); The outer end of the H-shaped track (1) is fixedly connected to a plurality of groups of electric heating units, the electric heating units comprising a hydrogen-nitrogen gas supply pipe (5), a heating rod (6) and a thermocouple (7), the hydrogen-nitrogen gas supply pipe (5) comprising an inflation pipe (51) located outside the H-shaped track (1), a deflation pipe (52) fixedly extending into the H-shaped track (1), and a reverse connector (8) connecting the inflation pipe (51) and the deflation pipe (52), the deflation pipe (52) having a plurality of deflation holes (501) formed at the upper end thereof, the openings of the plurality of deflation holes (501) all facing the gas storage chamber and communicating with the gas storage chamber.

2. A track structure suitable for a soft solder die bonding machine according to claim 1, characterized in that: The bottom of the embedded cover plate (3) is provided with two air expansion grooves (302), the front and rear edges of the bottom of the embedded cover plate (3) are provided with a plurality of air guide grooves (301), and the bottom of the embedded cover plate (3) is further provided with two rows of upper air storage grooves (303), the two rows of upper air storage grooves (303) and the plurality of air guide grooves (301) are all in communication with adjacent air expansion grooves (302).

3. The track structure suitable for a soft solder die bonding machine according to claim 1, characterized in that: The inflation tube (51) is arranged in two sections, and a pressure measuring ring (9) is provided between the ends of the two sections of the air release holes (501) that are close to each other. The left and right ends of the pressure measuring ring (9) and the ends opposite to the air release holes (501) and the pressure measuring ring (9) are fixedly connected with mounting plates (93), and the two opposite mounting plates (93) are connected by a plurality of bolts.

4. The track structure suitable for a soft solder die bonding machine according to claim 3, characterized in that: The reverse connector (8) comprises a reverse connector pipe (83) fixedly connected to a connector housing (81), a positioning ring (82), and an end of the positioning ring (82) close to the connector housing (81); an outwardly expanding thread groove (502) is cut into the inner wall of the end of the connector housing (81) close to the positioning ring (82); the reverse connector pipe (83) is threadedly connected to the outwardly expanding thread groove (502); and the pressure measuring ring (9) contacts the inner wall of the outwardly expanding thread groove (502) away from the positioning ring (82).

5. The track structure suitable for a soft solder die bonding machine according to claim 4, characterized in that: The inner diameters of the joint housing (81) and the reverse connecting pipe (83) are consistent with the outer diameter of the inflation pipe (51), and an end portion of the inflation pipe (51) close to the outwardly expanded thread groove (502) is in contact with the positioning ring (82).

6. The track structure suitable for a soft solder die bonding machine according to claim 5, characterized in that: The pressure measuring ring (9) comprises two positioning sections (91) respectively contacting an adjacent section of the inflation tube (51) and a pressure measuring section (92) fixedly connected between the two positioning sections (91); the middle portion of the pressure measuring section (92) contacts the inner wall of the outwardly expanded thread groove (502); and an air pressure monitoring component is installed between the positioning ring (82) and the pressure measuring ring (9).

7. The track structure suitable for a soft solder die bonding machine according to claim 6, characterized in that: The positioning section (91) is a hard, fixed structure, the pressure measuring section (92) is an elastic sealing structure, and the middle portion of the pressure measuring section (92) is an arc-shaped protrusion facing the outside of the inflation tube (51).

8. The track structure suitable for a soft solder die bonding machine according to claim 7, characterized in that: The air pressure monitoring assembly comprises a pressure sensor (10) mounted on a positioning ring (82) near the end of a pressure measuring ring (9), a feeler rod (11) movably penetrating two mounting plates (93) corresponding to the pressure sensor (10), and an elastic element (12) fixedly connected between the outer end of the feeler rod (11) near the pressure measuring ring (9) and the mounting plate (93); when the feeler rod (11) is not subjected to force, both ends of the elastic element (12) are not in contact with the pressure sensor (10) and the pressure measuring section (92) at the same time.

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