Power module PIN welding device

Abstract

The invention provides a power module PIN welding device, and relates to the field of PIN welding, the power module PIN welding device comprises a pin block, the pin block comprises a plurality of welding plates, a plurality of pin channels penetrate through the welding plates, the positions of the pin channels on the welding plates are matched with welding point positions on a power module, and the pin channels are arranged on the welding plates; the pin inserting block is movably arranged along the length direction; the spacing plate is arranged above the pin inserting block, and a spacing channel penetrates through the spacing plate; the placement plate is slidably arranged on the upper surface of the contact pin block in the width direction of the contact pin block, a placement groove is formed in the upper surface of the placement plate, welding channels matched with the contact pin channels in the welding plate block in number are formed in the bottom of the placement groove in a penetrating mode, and the inner diameter of the welding channels is larger than that of the interval channels; and the lifting plates are parallelly arranged below the lower surface of the pin inserting block at intervals, and the distance is adjustable. The welding efficiency and the welding effect of the PINs can be improved, and high practicability is achieved.

Description

Technical Field

[0001] The present application relates to the field of integrated packaging and PIN pin welding, and in particular to a power module PIN pin welding device. Background Art

[0002] A power module is an electronic component used to handle high voltage and high current. It is widely used in power electronics, motor drives, renewable energy systems and other fields. In actual applications, a power module is usually equipped with multiple PIN pins, which are used to connect it to other parts on the circuit board for signal transmission, power supply and grounding.

[0003] At present, PIN pins are generally welded to power modules by soldering, that is, solder paste is applied to the welding points of the power module, the PIN pins are fixed to the welding points, the solder paste is heated to make the solder paste cover the welding points, and the welding is completed after cooling. This welding method requires the PIN pins and power modules to be transferred between multiple devices, the welding efficiency is low, and the tin material only exists at the contact point between the PIN pins and the power module. The PIN pins are easy to fall off during subsequent use, and the welding effect is poor. Summary of the invention

[0004] In order to solve the above-mentioned defects of the related prior art, the present application provides a power module PIN pin welding device, which can improve the welding efficiency and welding effect of the PIN pin and has strong practicality.

[0005] In order to achieve the above object, the present invention adopts the following technologies: A power module PIN pin welding device, used for welding a PIN pin to a power module, the device comprising: The pin block comprises a plurality of welding plates arranged in an array along its length direction, each of the welding plates is provided with a plurality of pin channels along the height direction of the pin block, the position of each pin channel on the welding plate matches a welding point on a power module, and the pin block is arranged to move along the length direction; A spacer plate is arranged just above the moving track of the pin block, and the middle of the spacer plate is penetrated along the height direction with a number of spacer channels matching the number of the pin channels, and the inner diameter of the spacer channel matches the inner diameter of the upper end of the pin channel. When the pin block moves to just below the middle of the spacer plate, the upper surface of the pin block and the lower surface of the spacer plate are in sliding contact, and the pin channels are coaxial with the spacer channels respectively; A placement plate is slidably arranged on the upper surface of the pin block along the width direction of the pin block, and the upper surface of the placement plate is provided with placement grooves whose number matches the welding plate and whose size matches the power module, and the placement grooves are arranged in an array along the length direction and the array spacing matches the welding plate, and the bottom of the placement grooves is penetrated by welding channels whose number matches the pin channel on one welding plate, and the inner diameter of the welding channel is larger than the inner diameter of the spacing channel, and when the placement plate moves to the middle of the spacing plate, the welding channels are coaxial with the spacing channels respectively; The lifting plates are arranged parallel to and below the lower surface of the pin block at intervals and the spacing is adjustable.

[0006] Furthermore, the PIN needle includes a needle body, a base, and a chassis. The base is coaxially arranged on the chassis, and the needle body is coaxially arranged on the base. The pin insertion channel includes a needle body channel, a circular channel, a base channel, and a chassis channel arranged from bottom to top. The cross-sectional shape and size of the needle body channel match the needle body. The cross-section of the circular channel is circular and the size matches the needle body. The sum of the depths of the needle body channel and the circular channel is less than the length of the needle body. The size of the base channel matches the base, and the size of the chassis channel matches the chassis.

[0007] Furthermore, a first electric screw is provided on one side of the pin block, and a first sliding rod is provided on the other side. The first electric screw rod is threadedly matched with a first matching block, the first matching block is connected to the first driving bar, a first sliding block is provided on the sliding sleeve of the first sliding rod, the first sliding block is connected to the second driving bar, and a first mounting bin is provided on the side of the second driving bar facing the pin block, two second sliding rods parallel to the width direction are connected between the first driving bar and the second driving bar, the same sliding bar is provided on the sliding sleeve of the second sliding rod, and a second mounting bin is provided on the side of the sliding bar facing the pin block, and a spring is provided on the second sliding rod, and two ends of the spring are respectively connected to the first driving bar and the sliding bar. When the spring is in the original state, the spacing between the first driving bar and the sliding bar is smaller than the width of the pin block, and mounting blocks are provided at both ends of the pin block, and the mounting blocks are respectively used to extend into the first mounting bin and the second mounting bin.

[0008] Furthermore, a plurality of annular column bins are fixed above the partition plate, and a lifting ring is coaxially provided in the annular column bins, and the side walls of the lifting ring are in airtight sliding contact with the inner wall of the annular column bin, and the upper parts of the side walls of the annular column bins are connected with gas hoses, and the gas hoses are used to connect an external gas pump, and the lower end surface of the annular column bin is connected with a plurality of first ointment hoses, and an ointment plate is connected to one side of the placement plate, and the ointment plate is in sliding contact with the upper surface of the partition plate, and the ointment plate is penetrated with ointment holes in the number matching the spacing channels along the height direction, and when the ointment plate moves to the middle of the partition plate, the ointment holes are coaxial with the spacing channels, and the first ointment hoses are respectively connected with the ointment holes, and a second electric screw is provided above the partition plate along the width direction, and the second electric screw is threadedly matched with a second matching block, and the second matching block is connected to the upper surface of the placement plate, and a third sliding rod is provided above the partition plate along the width direction, and a third sliding rod is slidingly sleeved with a third sliding block, and the third sliding block is connected to the upper surface of the placement plate.

[0009] Furthermore, the upper end surfaces of the annular column bins are penetrated by sliding openings along the height direction, and sliding tubes are coaxially slidably fitted in the sliding openings. The outer wall of the sliding tube is in airtight sliding contact with the inner wall of the sliding opening. The lower end of the sliding tube is connected to the lifting ring and connected to the lower surface of the lifting ring. The upper end of the sliding tube is connected to a second paste delivery hose, and the second paste delivery hose is used to connect to an external solder paste storage device.

[0010] Furthermore, ventilation bins are provided at both ends of the lifting plate, one end of the ventilation bins is provided on the upper surface of the lifting plate and its internal space is connected to the lower surface of the lifting plate, the other end of the ventilation bins is provided with openings and the openings are facing the space above the middle part of the lifting plate, and a fan group is provided in the ventilation bins.

[0011] Furthermore, a third electric screw is provided along the height direction on the outside of one side of the lifting plate, the third electric screw is threadedly matched with a third matching block, the third matching block is connected to the lifting plate, and three fourth sliding rods are provided along the height direction on the circumference of the lifting plate, one of the fourth sliding rods is provided outside one side of the lifting plate, and the other two fourth sliding rods are provided outside the other side of the lifting plate, and the fourth sliding rods are all slidably sleeved with a fourth sliding block, and the fourth sliding blocks are all connected to the lifting plate.

[0012] Furthermore, heating blocks whose number matches the welding plate are arranged in parallel above the partition plate, the heating blocks are arranged in an array along the length direction and the array spacing matches the welding plate, the heating blocks are all arranged to be movable along the width direction, when the heating blocks move to above the middle of the partition plate, the lower surfaces of the heating blocks are respectively in sliding contact with the upper surfaces of the power modules in the placement grooves, a fourth electric screw is arranged above the partition plate along the width direction, the fourth electric screw is slidably matched with a fourth matching block, the fourth matching block is connected to a heating seat, the heating blocks are all connected to the lower surface of the heating seat, the heating seat is used to heat the heating blocks, a fifth sliding rod is arranged above the partition plate along the width direction, a fifth sliding rod is slidably sleeved with a fifth slider, and the fifth slider is connected to the heating seat.

[0013] Furthermore, a mounting frame is provided above the partition plate, and the mounting frame is used to connect to an external driving mechanism. A linear cylinder with a driving direction parallel to the height direction is provided on a side of the mounting frame facing the partition plate. The driving shaft of the linear cylinder is connected to a mounting bar. The lower surface of the mounting bar is connected to a suction cup mechanism whose number and spacing match those of the welding plate, and the suction cup mechanism is used to adsorb the power module.

[0014] Furthermore, the surface of the partition plate, the inner wall of the partition channel, the lower surface of the placement plate, the bottom surface of the placement groove, and the inner wall of the welding channel are all coated with a polytetrafluoroethylene coating.

[0015] The beneficial effects of the present invention are: 1. After inserting the PIN into the pin block and placing the power module into the placement slot, the device can be used for welding. There is no need to transfer the PIN and the power module between multiple devices, which improves the welding efficiency.

[0016] 2. Perform welding in the welding channel and move the PIN needle upward before welding so that the solder paste can cover the upper end of the tin needle, ensuring the stability of welding and improving the welding effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional schematic diagram of a power module PIN needle welding device according to an embodiment of the present application.

[0018] Figure 2 It is a three-dimensional schematic diagram of a power module after PIN welding according to an embodiment of the present application.

[0019] Figure 3 It is a three-dimensional schematic diagram of the pin block and its accessory structure of an embodiment of the present application.

[0020] Figure 4 It is a planar cross-sectional view of the pin channel, the spacing channel, and the welding channel of the embodiment of the present application.

[0021] Figure 5It is a three-dimensional schematic diagram of the spacer plate and the placement plate of the embodiment of the present application.

[0022] Figure 6 It is a three-dimensional schematic diagram of the annular column bin and its accessory structure according to an embodiment of the present application.

[0023] Figure 7 It is a three-dimensional schematic diagram of the lifting plate and its auxiliary structure according to an embodiment of the present application.

[0024] Figure 8 It is a three-dimensional schematic diagram of the heating block and its accessory structure according to an embodiment of the present application.

[0025] Fig. 9 It is a three-dimensional schematic diagram of the suction cup mechanism and its accessory structure of an embodiment of the present application.

[0026] Markings in the figure: 1-pin block, 11-pin channel, 12-needle body channel, 13-circular channel, 14-base channel, 15-chassis channel, 16-first electric screw, 17-first matching block, 18-first drive bar, 19-first slide bar, 110-first slider, 111-second drive bar, 112-first installation bin, 113-second slide bar, 114-slide bar, 115-second installation bin, 116-spring, 117-installation block, 2-spacer, 21-spacer channel, 3-placement plate, 31-placement slot, 32-welding channel, 4-lifting plate, 41-ventilation bin, 42-fan group, 43-third electric screw, 44-third matching block, 4 5-fourth slide bar, 46-fourth slider, 5-heating block, 51-fourth electric screw rod, 52-fourth matching block, 53-heating seat, 54-fifth slide bar, 55-fifth slider, 6-annular column bin, 61-lifting ring, 62-gas delivery hose, 63-first ointment delivery hose, 64-ointment delivery plate, 65-ointment delivery hole, 66-second electric screw rod, 67-second matching block, 68-third slide bar, 69-third slider, 610-sliding port, 611-sliding tube, 612-second ointment delivery hose, 7-mounting frame, 71-linear cylinder, 72-mounting bar, 73-suction cup mechanism, 8-PIN needle, 81-needle body, 82-base, 83-chassis, 9-power module. DETAILED DESCRIPTION

[0027] To make the objectives, technical solutions and advantages of the embodiments of the present invention more clear, the implementation modes of the present invention are described in detail below with reference to the accompanying drawings. However, the embodiments described in the present invention are only part of the embodiments of the present invention, rather than all the embodiments.

[0028] like Figure 1 and Figure 2As shown, this embodiment provides a power module PIN pin welding device for welding a PIN pin 8 to a power module 9, comprising a pin block 1, a spacer plate 2, a placement plate 3, and a lifting plate 4.

[0029] Specifically, Figure 2 and Figure 3 As shown, the pin block 1 includes four welding plates arranged in an array along its length direction, and the welding plates are each provided with a plurality of pin channels 11 extending along the height direction of the pin block 1. The position of the pin channel 11 on each welding plate matches a welding point on a power module 9. The pin block 1 is movably arranged along the length direction, and a plurality of welding plates are arranged on the pin block 1 so that one pin block 1 can fix the welding pins required to be welded on a plurality of power modules 9.

[0030] Specifically, Figure 1 , Figure 2 , Figure 4 As shown, the spacer plate 2 is arranged just above the moving track of the pin block 1, and the middle part of the spacer plate 2 is penetrated along the height direction with spacer channels 21 whose number matches the pin channels 11, and the inner diameter of the spacer channel 21 matches the inner diameter of the upper end of the pin channel 11, and the matching here is used to enable the upper end of the PIN pin 8 to enter the spacer channel 21; when the pin block 1 moves to just below the middle part of the spacer plate 2, the upper surface of the pin block 1 slides in contact with the lower surface of the spacer plate 2, and the pin channels 11 are coaxial with the spacer channels 21 respectively.

[0031] Specifically, Figure 3~Figure 5 As shown, the placement plate 3 is slidably arranged on the upper surface of the pin block 1 along the width direction of the pin block 1, and the upper surface of the placement plate 3 is provided with placement grooves 31 whose number matches the welding plate and whose size matches the power module 9. More specifically, in this example, four placement grooves 31 are provided; the placement grooves 31 are arranged in an array along the length direction and the array spacing matches the welding plate, and the bottom of the placement grooves 31 is penetrated by welding channels 32 whose number matches the pin channels 11 on one of the welding plates. More specifically, the position of the welding channel 32 at the bottom of the placement groove 31 matches the position of the welding point on the power module 9, and the inner diameter of the welding channel 32 is larger than the inner diameter of the spacing channel 21. When the placement plate 3 moves to the middle of the spacing plate 2, the welding channels 32 are coaxial with the spacing channels 21.

[0032] Specifically, Figure 1 As shown, the lifting plates 4 are arranged parallel to and spaced below the lower surface of the pin block 1 and the spacing is adjustable.

[0033] During operation, move the pin block 1 so that it is located outside one side of the spacer plate 2. At this time, insert the PIN pins 8 into the pin channels 11 from the upper surface of the pin block 1 in sequence. Then move the pin block 1 to the middle of the spacer plate 2, so that the upper surface of the pin block 1 and the lower surface of the spacer plate 2 are in sliding contact. At this time, the pin channels 11 are coaxial with the spacer channels 21 respectively, and the solder paste is filled into the spacer channels 21 in sequence; put the power modules 9 into the placement grooves 31 in sequence, and the side of the power module 9 soldered with the PIN pins 8 is in contact with the bottom of the placement groove 31 , at this time, the welding points of the power module 9 are respectively located at the welding channels 32; the placement plate 3 is moved to the middle of the spacing plate 2, at this time, the welding channels 32 are respectively coaxial with the spacing channels 21; the lifting plate 4 is moved upward, so that the lifting plate 4 contacts the lower end of the PIN pin 8 and drives the PIN pin 8 to move upward in the pin insertion channel 11, and at the same time, the power module 9 is supported by a manual or mechanical structure to limit it, so that the upper end of the PIN pin 8 passes through the spacing channel 21 and enters the welding channel 32, and contacts the welding point of the power module 9; due to the welding The inner diameter of the connection channel 32 is larger than the inner diameter of the spacing channel 21. The solder paste is squeezed by the upper end of the PIN pin 8 to fill the space between the upper end of the PIN pin 8 and the inner wall of the welding channel 32, and the welding point of the power module 9 and the upper end of the PIN pin 8 are coated; the PIN pin 8 or the power module 9 is heated by an external heating device to melt the solder paste and wrap it around the welding point of the power module 9 and the upper end of the PIN pin 8. Under the action of gravity, the creeping performance of the solder paste after melting is improved, and it can wrap a larger area of ​​the upper end of the PIN pin 8 downward; the limit of the power module 9 is cancelled, and the lifting plate 4 continues to move upward smoothly. The lifting plate 4 drives the power module 9 to leave the placement groove 31 upward through the PIN pin 8. At this time, the welding point is exposed to the outside world, and the welding point can be left to cool. After cooling, the power module 9 is grabbed upward by a manual or mechanical structure, so that the PIN pin 8 leaves the pin channel 11, the spacing channel 21, the welding channel 32, and the placement groove 31 in turn, and the power module 9 welded with the PIN pin 8 is taken out, and the welding is completed.

[0034] Preferably, Figure 2 , Figure 3 , Figure 5As shown, the PIN needle 8 includes a needle body 81, a base 82, and a chassis 83. The base 82 is coaxially arranged on the chassis 83, and the needle body 81 is coaxially arranged on the base 82. The pin insertion channel 11 includes a needle body channel 12, a circular channel 13, a base channel 14, and a chassis channel 15 arranged from bottom to top. The cross-sectional shape and size of the needle body channel 12 are matched with the needle body 81. Specifically, in this example, the cross-sectional shape of the needle body 81 is rectangular, and the needle body channel 12 is used to limit the rotation of the needle body 81; the cross-sectional shape of the circular channel 13 is circular And the size matches the needle body 81. This design is used to avoid that the contact area between the needle body 81 and the inner wall of the needle insertion channel 11 is too large when the needle body 81 moves in the needle insertion channel 11, thereby generating greater friction during movement, affecting the stability of movement, and causing wear on the surface of the needle body 81; the sum of the depths of the needle body channel 12 and the circular channel 13 is less than the length of the needle body 81, so that the lower end of the needle body 81 can extend out of the lower end of the needle body channel 12 after the needle insertion is completed; the size of the base channel 14 matches the base 82, and the size of the chassis channel 15 matches the chassis 83.

[0035] Preferably, Figure 3 As shown, a first electric screw rod 16 is provided on the outer side of the pin block 1 along the length direction, and the first electric screw rod 16 is threadedly matched with a first matching block 17, and the first matching block 17 is connected to a first driving bar 18, and a first sliding rod 19 is provided on the outer side of the other side of the pin block 1 along the length direction, and a first sliding block 110 is slidably sleeved on the first sliding rod 19, and the first sliding block 110 is connected to a second driving bar 111, and a first mounting chamber 112 is provided on a side of the second driving bar 111 facing the pin block 1, and two second sliding rods 113 parallel to the width direction are connected between the first driving bar 18 and the second driving bar 111, and the second sliding rod 113 is slidably sleeved with the same sliding bar 114, and a second mounting chamber 115 is provided on a side of the sliding bar 114 facing the pin block 1, and the second sliding rod 113 is sleeved on the outer side thereof. Spring 116, both ends of the spring 116 are respectively connected to the first drive bar 18 and the slide bar 114, when the spring 116 is in the original state, the spacing between the first drive bar 18 and the slide bar 114 is smaller than the width of the pin block 1, and mounting blocks 117 are provided at both ends of the pin block 1, and the mounting blocks 117 are respectively used to extend into the first mounting bin 112 and the second mounting bin 115, and the first electric screw rod 16 is used to drive the pin block 1 to move along the length direction; such a design can be used to insert the pins of one pin block 1 while performing welding work, and when the welding work is completed, the pin block 1 that has completed the welding work is directly taken out, and the other pin block 1 with the pins inserted is installed in the equipment, and the next welding can be started immediately, and the pin insertion work and the welding work are carried out simultaneously, which improves the welding efficiency.

[0036] Preferably, Figure 2 and Figure 6As shown, four annular column bins 6 are fixed above the partition plate 2, and the annular column bins 6 are used to store solder paste; a lifting ring 61 is coaxially arranged in the annular column bin 6, and the side wall of the lifting ring 61 is in airtight sliding contact with the inner wall of the annular column bin 6, and the upper part of the side wall of the annular column bin 6 is connected with a gas delivery hose 62, and the gas delivery hose 62 is used to connect an external gas pump; the lower end surface of the annular column bin 6 is connected with a plurality of first paste delivery hoses 63, and a paste delivery plate 64 is connected to one side of the placement plate 3, and the paste delivery plate 64 is in sliding contact with the upper surface of the partition plate 2, and the paste delivery plate 64 is penetrated with paste delivery holes 65 in the height direction, and the number of paste delivery holes 65 matching the spacing channel 21 is passed through the paste delivery plate 64. When the paste delivery plate 64 moves to the middle of the partition plate 2, the paste delivery holes 65 are respectively coaxial with the spacing channel 21, and the first paste delivery hoses 63 are respectively connected with the paste delivery holes 65. Two electric screws 66, the second electric screw 66 is threadedly matched with a second matching block 67, the second matching block 67 is connected to the upper surface of the placement plate 3, a third slide bar 68 is provided above the partition plate 2 along the width direction, and a third slider 69 is slidably sleeved on the third slide bar 68, the third slider 69 is connected to the upper surface of the placement plate 3, and the second electric screw 66 is used to drive the placement plate 3 to slide on the upper surface of the partition plate 2; when working, the solder paste fills the space between the lifting ring 61 and the lower end of the annular column bin 6, and the paste delivery plate 64 is moved to the middle of the partition plate 2. At this time, the paste delivery holes 65 are coaxial with the spacing channels 21 respectively, and the air pressure in the space between the lifting ring 61 and the upper end of the annular column bin 6 is controlled by the air delivery hose 62 to drive the lifting ring 61 to move, and drive the solder paste through the first paste delivery hose 63, that is, the paste delivery hole 65 into the spacing channel 21, that is, the filling of the solder paste is completed.

[0037] Preferably, Figure 6 As shown, the upper end surface of the annular column bin 6 is penetrated by a sliding opening 610 along the height direction, and a sliding tube 611 is coaxially slidably fitted in the sliding opening 610. The outer wall of the sliding tube 611 is in airtight sliding contact with the inner wall of the sliding opening 610, and the lower end of the sliding tube 611 is connected to the lifting ring 61 and connected to the lower surface of the lifting ring 61, and the upper end of the sliding tube 611 is connected to a second paste delivery hose 612, and the second paste delivery hose 612 is used to connect with an external solder paste storage device; with such a design, when the placement plate 3 is located in the middle of the partition plate 2, by reducing the air pressure in the space between the lifting ring 61 and the upper end of the annular column bin 6, the lifting ring 61 is driven to move upward, and the external solder paste can be drawn into the annular column bin 6 through the sliding tube 611 and the second paste delivery hose 612 to replenish the solder paste.

[0038] Preferably, Figure 7As shown, ventilation bins 41 are provided at both ends of the lifting plate 4, one end of the ventilation bins 41 is provided on the upper surface of the lifting plate 4 and its internal space is connected to the lower surface of the lifting plate 4, the other end of the ventilation bins 41 is open and its opening faces the space above the middle of the lifting plate 4, and a fan group 42 is provided in the ventilation bins 41. The ventilation bins 41 and the fan group 42 are used to accelerate the cooling of the welding points when the welding points are exposed to the outside world.

[0039] Preferably, Figure 7 As shown, a third electric screw 43 is provided along the height direction outside one side of the lifting plate 4, and the third electric screw 43 is threadedly matched with a third matching block 44, and the third matching block 44 is connected to the lifting plate 4. Three fourth sliding rods 45 are provided along the height direction on the circumference of the lifting plate 4, one of the fourth sliding rods 45 is provided outside one side of the lifting plate 4, and the other two fourth sliding rods 45 are provided outside the other side of the lifting plate 4. The fourth sliding rods 45 are all slidably sleeved with fourth sliding blocks 46, and the fourth sliding blocks 46 are all connected to the lifting plate 4. The third electric screw 43 is used to drive the lifting plate 4 to move along the height direction.

[0040] Preferably, Figure 2 and Figure 8 As shown, a number of heating blocks 5 matching the welding plate are arranged in parallel above the spacer plate 2, the heating blocks 5 are arranged in an array along the length direction and the array spacing matches the welding plate, and the heating blocks 5 are all arranged to move along the width direction. When the heating blocks 5 move to the upper middle part of the spacer plate 2, the lower surfaces of the heating blocks 5 are respectively in sliding contact with the upper surfaces of the power modules 9 in the placement grooves 31, and a fourth electric screw 51 is arranged above the spacer plate 2 along the width direction. The fourth electric screw 51 is slidably matched with a fourth matching block 52, and the fourth matching block 52 is connected to the heating The seat 53, the heating block 5 are connected to the lower surface of the heating seat 53, the heating seat 53 is used to heat the heating block 5, a fifth sliding bar 54 is provided above the partition plate 2 along the width direction, a fifth sliding block 55 is slidably sleeved on the fifth sliding bar 54, the fifth sliding block 55 is connected to the heating seat 53, when working, the heating block 5 is used to contact heat the power module 9, and then heat the welding point by heat conduction, and the heating block 5 can limit the power module 9 at the same time; the fourth electric screw 51 is used to drive the heating block 5 to move along the width direction.

[0041] Preferably, Figure 1 and Fig. 9 As shown, a mounting frame 7 is provided above the partition plate 2, and the mounting frame 7 is used to connect to an external driving mechanism. A linear cylinder 71 with a driving direction parallel to the height direction is provided on one side of the mounting frame 7 facing the partition plate 2. The driving shaft of the linear cylinder 71 is connected to a mounting bar 72. The lower surface of the mounting bar 72 is connected to a suction cup mechanism 73 whose number and spacing match those of the welding plate. The suction cup mechanism 73 is used to adsorb the power module 9.

[0042] Preferably, the surface of the partition plate 2, the inner wall of the partition channel 21, the lower surface of the placement plate 3, the bottom surface of the placement groove 31, and the inner wall of the welding channel 32 are all coated with a polytetrafluoroethylene coating. This design is used to prevent the molten tin from adhering to the surface of the partition plate 2, the inner wall of the partition channel 21, the lower surface of the placement plate 3, the bottom surface of the placement groove 31, and the welding channel 32, and only adhere to the welding points.

[0043] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Obviously, those skilled in the art can make various modifications and variations to the present application without departing from the spirit and scope of the present application.

Claims

1. A power module PIN pin welding device, used for welding a PIN pin (8) to a power module (9), characterized in that the device include: A pin block (1) comprises a plurality of welding plates arranged in an array along its length direction, each of the welding plates having a plurality of pin channels (11) extending along the height direction of the pin block (1), the position of each pin channel (11) on the welding plate matching a welding point on a power module (9), and the pin block (1) being arranged to move along the length direction; The spacer plate (2) is arranged just above the moving track of the pin block (1), and the middle part of the spacer plate (2) is penetrated along the height direction by a number of spacer channels (21) matching the number of the pin channels (11), and the inner diameter of the spacer channel (21) matches the inner diameter of the upper end of the pin channel (11). When the pin block (1) moves to just below the middle part of the spacer plate (2), the upper surface of the pin block (1) and the lower surface of the spacer plate (2) are in sliding contact, and the pin channels (11) are coaxial with the spacer channels (21). A placement plate (3) is slidably disposed on the upper surface of the pin block (1) along the width direction of the pin block (1); the upper surface of the placement plate (3) is provided with placement grooves (31) whose number matches the welding plate and whose size matches the power module (9); the placement grooves (31) are arranged in an array along the length direction and the array spacing matches the welding plate; the bottom of the placement grooves (31) is penetrated by welding channels (32) whose number matches the pin channels (11) on one welding plate; the inner diameter of the welding channel (32) is larger than the inner diameter of the spacing channel (21); when the placement plate (3) moves to the middle of the spacing plate (2), the welding channels (32) are coaxial with the spacing channels (21); The lifting plates (4) are arranged parallel to and spaced below the lower surface of the pin block (1) and the spacing is adjustable.

2. The power module PIN pin welding device according to claim 1, characterized in that: The PIN needle (8) comprises a needle body (81), a base (82), and a chassis (83); the base (82) is coaxially arranged on the chassis (83); the needle body (81) is coaxially arranged on the base (82); the pin insertion channel (11) comprises a needle body channel (12), a circular channel (13), a base channel (14), and a chassis channel (15) arranged from bottom to top; the cross-sectional shape and size of the needle body channel (12) both match those of the needle body (81); the cross-sectional shape and size of the circular channel (13) are circular and match those of the needle body (81); the sum of the depths of the needle body channel (12) and the circular channel (13) is less than the length of the needle body (81); the size of the base channel (14) matches that of the base (82); and the size of the chassis channel (15) matches that of the chassis (83).

3. The power module PIN pin welding device according to claim 1, characterized in that: A first electric screw (16) is provided on one side of the pin block (1), and a first slide bar (19) is provided on the other side. The first electric screw (16) is threadedly matched with a first matching block (17). The first matching block (17) is connected to a first driving bar (18). A first sliding block (110) is slidably sleeved on the first sliding bar (19). The first sliding block (110) is connected to a second driving bar (111). A first mounting chamber (112) is provided on a side of the second driving bar (111) facing the pin block (1). Two second sliding bars (113) parallel to the width direction are connected between the first driving bar (18) and the second driving bar (111). The sliding sleeves on the two slide bars (113) are provided with the same slide bar (114), and a second mounting chamber (115) is provided on a side of the slide bar (114) facing the pin block (1). A spring (116) is provided on the second slide bar (113), and two ends of the spring (116) are respectively connected to the first drive bar (18) and the slide bar (114). When the spring (116) is in an original state, the distance between the first drive bar (18) and the slide bar (114) is smaller than the width of the pin block (1). Both ends of the pin block (1) are provided with mounting blocks (117), and the mounting blocks (117) are respectively used to extend into the first mounting chamber (112) and the second mounting chamber (115).

4. The power module PIN pin welding device according to claim 1, characterized in that: A plurality of annular column bins (6) are fixed above the partition plate (2), and a lifting ring (61) is coaxially arranged inside the annular column bins (6). The side wall of the lifting ring (61) is in airtight sliding contact with the inner wall of the annular column bin (6), and the upper part of the side wall of the annular column bin (6) is connected to a gas delivery hose (62), and the gas delivery hose (62) is used to connect to an external gas pump. The lower end surface of the annular column bin (6) is connected to a plurality of first ointment delivery hoses (63), and an ointment delivery plate (64) is connected to one side of the placement plate (3), and the ointment delivery plate (64) is in sliding contact with the upper surface of the partition plate (2), and the ointment delivery plate (64) is penetrated along the height direction by a number matching the spacing channel (21). The ointment delivery hole (65) is formed on the ointment delivery plate (64). When the ointment delivery plate (64) moves to the middle of the partition plate (2), the ointment delivery hole (65) is coaxial with the partition channel (21), and the first ointment delivery hose (63) is communicated with the ointment delivery hole (65). A second electric screw (66) is provided above the partition plate (2) along the width direction. The second electric screw (66) is threadedly matched with a second matching block (67). The second matching block (67) is connected to the upper surface of the placement plate (3). A third sliding rod (68) is provided above the partition plate (2) along the width direction. A third sliding block (69) is provided on the sliding sleeve of the third sliding rod (68). The third sliding block (69) is connected to the upper surface of the placement plate (3).

5. The power module PIN pin welding device according to claim 4, characterized in that: The upper end surface of the annular column bin (6) is penetrated by a sliding opening (610) along the height direction, and a sliding tube (611) is coaxially slidably matched inside the sliding opening (610). The outer wall of the sliding tube (611) is in airtight sliding contact with the inner wall of the sliding opening (610). The lower end of the sliding tube (611) is connected to the lifting ring (61) and communicated to the lower surface of the lifting ring (61). The upper end of the sliding tube (611) is connected to a second paste delivery hose (612), and the second paste delivery hose (612) is used to communicate with an external solder paste storage device.

6. The power module PIN pin welding device according to claim 1, characterized in that: Both ends of the lifting plate (4) are provided with ventilation bins (41); one end of the ventilation bins (41) is provided on the upper surface of the lifting plate (4) and its internal space is communicated with the lower surface of the lifting plate (4); the other end of the ventilation bins (41) is provided with openings and the openings face the space above the middle of the lifting plate (4); and a fan group (42) is provided in the ventilation bins (41).

7. The power module PIN pin welding device according to claim 1, characterized in that: A third electric screw (43) is provided on the outside of one side of the lifting plate (4) along the height direction, the third electric screw (43) is threadedly matched with a third matching block (44), the third matching block (44) is connected to the lifting plate (4), and three fourth sliding rods (45) are provided on the circumference of the lifting plate (4) along the height direction, one of the fourth sliding rods (45) is provided on the outside of one side of the lifting plate (4), and the other two fourth sliding rods (45) are provided on the outside of the other side of the lifting plate (4), and the fourth sliding rods (46) are all slidably sleeved on the fourth sliding rods (45), and the fourth sliding rods (46) are all connected to the lifting plate (4).

8. The power module PIN pin welding device according to claim 1, characterized in that: A number of heating blocks (5) matching the number of the welding plates are arranged in parallel and at intervals above the partition plate (2). The heating blocks (5) are arranged in an array along the length direction and the array spacing matches the welding plates. The heating blocks (5) are all arranged to move along the width direction. When the heating blocks (5) move to the middle of the partition plate (2), the lower surfaces of the heating blocks (5) respectively come into sliding contact with the upper surfaces of the power modules (9) in the placement grooves (31). A fourth electric screw (51) is arranged above the partition plate (2) along the width direction. The fourth electric screw (51) is slidably matched with a fourth matching block (52). The fourth matching block (52) is connected to a heating seat (53). The heating blocks (5) are all connected to the lower surface of the heating seat (53). The heating seat (53) is used to heat the heating blocks (5). A fifth sliding rod (54) is arranged above the partition plate (2) along the width direction. A fifth sliding block (55) is provided on the sliding sleeve of the fifth sliding rod (54). The fifth sliding block (55) is connected to the heating seat (53).

9. The power module PIN pin welding device according to claim 1, characterized in that: A mounting frame (7) is provided above the partition plate (2), the mounting frame (7) being used to connect to an external driving mechanism, a linear cylinder (71) having a driving direction parallel to the height direction is provided on a side of the mounting frame (7) facing the partition plate (2), a mounting bar (72) is connected to the driving shaft of the linear cylinder (71), a suction cup mechanism (73) whose number and spacing match those of the welding plate is connected to the lower surface of the mounting bar (72), and the suction cup mechanism (73) is used to adsorb the power module (9).

10. The power module PIN pin welding device according to claim 1, characterized in that: The surface of the partition plate (2), the inner wall of the partition channel (21), the lower surface of the placement plate (3), the bottom surface of the placement groove (31), and the inner wall of the welding channel (32) are all coated with a polytetrafluoroethylene coating.

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