A copper clip welding head pick-up and placement mechanism for semiconductor clamp welding equipment

Abstract

The present invention relates to the field of semiconductor processing technology, and in particular to a copper clip welding head pick-up and placement mechanism for semiconductor clamp welding equipment. It includes a welding head pick-up and placement mounting bracket, a small Z-axis assembly is installed on the welding head pick-up and placement mounting bracket, a rotating shaft motor assembly is installed on the top of the small Z-axis assembly; a rotating shaft assembly is installed at the bottom of the small Z-axis assembly; the rotating shaft assembly is connected to the rotating shaft synchronous wheel by transmission, and an A&B suction nozzle set is installed at the bottom of the rotating shaft assembly, and the A&B suction nozzle set includes an A suction nozzle and a B suction nozzle; the rotating shaft assembly includes a B suction nozzle fixing plate and an A suction nozzle fixing plate, and an AB switching motor is installed on one side of the B suction nozzle fixing plate, and an eccentric shaft is connected to the output end of the AB switching motor by transmission; the eccentric shaft is driven to rotate by the AB switching motor, and the A suction nozzle and the B suction nozzle are driven to switch positions, so as to realize one-time punching of two groups of A / B Clips in the mold, and then the two groups of A / B copper clips are mounted to the lead frame in two times.

Description

Technical Field

[0001] The invention belongs to the technical field of semiconductor processing, and in particular relates to a copper clamp pick-up and place-down welding head mechanism of semiconductor clamp welding equipment. Background Art

[0002] The product array design on the lead frame of semiconductor devices is mostly arrayed by "simple matrix arrangement". Correspondingly, the Clips on the Clip material strip are also arrayed by "simple matrix arrangement", but in order to improve the utilization rate of the raw materials of the Leadframe and the copper clip material strip, the product array is not arrayed by "simple matrix arrangement", but by "two groups of AB simple matrix nesting arrangement". In this case, the Clips on the Clip material strip are also arrayed by "two groups of AB simple matrix nesting arrangement".

[0003] For the lead frame with "simple matrix arrangement", only a pick-and-place head mechanism with an independent suction nozzle needs to be installed on the welding head of the clamp welding machine to complete the Clip punching and mounting process flow of "die punching Clip" → "pick-and-place head sucks Clip from the die" → "pick-and-place head mounts Clip on the lead frame".

[0004] For the leadframe and copper clip tape of "two groups of simple matrix nesting arrangement AB", there are only two options:

[0005] Sacrificial UPH, a set of "two groups of simple matrix nesting arrangement AB" is punched twice in the mold, and then the pick-and-place head completes the process of "die punching Clip" twice → "pick-and-place head sucks Clip from the mold" → "pick-and-place head mounts Clip on the lead frame" twice;

[0006] In order to preserve UPH and sacrifice costs, two clamping and welding devices are connected online. The two devices complete the processes of "die punching Clip" → "pick and place head sucking Clip from the die" → "pick and place head mounting Clip on the lead frame" for group A matrix and group B matrix respectively.

[0007] Both options have drawbacks: one option sacrifices UPH, and the other option increases equipment procurement costs. Summary of the invention

[0008] In view of the above problems, the present invention provides a copper clamp welding head pick-up and placement mechanism for semiconductor clamp welding equipment, comprising a welding head pick-up and placement mounting bracket, a small Z-axis assembly is mounted on the welding head pick-up and placement mounting bracket, and a rotating shaft motor assembly is mounted on the top of the small Z-axis assembly;

[0009] The rotating shaft motor assembly is transmission-connected with a rotating shaft synchronous wheel, and the bottom end of the small Z-axis assembly is installed with a rotating shaft assembly;

[0010] The rotating shaft assembly is connected to the rotating shaft synchronous wheel by transmission, and an A&B nozzle set is installed at the bottom end of the rotating shaft assembly, and the A&B nozzle set includes an A nozzle and a B nozzle;

[0011] The rotating shaft assembly includes a B nozzle fixing plate and an A nozzle fixing plate, an AB switching motor is installed on one side of the B nozzle fixing plate, and an output end of the AB switching motor is transmission-connected with an eccentric shaft;

[0012] The AB switching motor drives the eccentric shaft to rotate, driving the A nozzle and the B nozzle to switch positions, so that the A / B two sets of Clips can be punched in the mold at one time, and then the A / B two sets of copper clips can be mounted to the lead frame in two times.

[0013] Furthermore, the rotating shaft synchronization wheel is installed on the B nozzle fixing plate, and two groups of AB nozzle up and down switching guide rails are symmetrically installed on one side of the B nozzle fixing plate, and the other ends of the two groups of AB nozzle up and down switching guide rails are connected to the A nozzle fixing plate, and the other end of the eccentric shaft passes through the B nozzle fixing plate and is installed with a bearing, and a first waist-shaped hole is opened on the A nozzle fixing plate, and the first waist-shaped hole is coupled to the bearing.

[0014] Furthermore, an A&B nozzle alignment origin device is installed on the A nozzle fixing plate, and an A&B nozzle alignment origin sensor is installed on one side of the B nozzle fixing plate and at one end close to the A nozzle fixing plate.

[0015] Furthermore, the A&B nozzle alignment origin device includes an origin device base, an origin alignment sensor plate and an origin crankshaft, the origin alignment sensor plate is plugged into the origin device base, a second waist-shaped hole is opened on the origin alignment sensor plate, and the origin crankshaft is coupled to the second waist-shaped hole.

[0016] Furthermore, two groups of bearing holes are provided on the base of the origin device, and two groups of adjusting bearings are sleeved on the origin crankshaft. The two groups of adjusting bearings are movably fitted with the two groups of bearing holes respectively. Both ends of the origin crankshaft are clamped with E-shaped retaining springs, and the two groups of E-shaped retaining springs are respectively fitted with the two groups of adjusting bearings. Straight grooves are provided on the end faces of both sides of the origin crankshaft, and the base of the origin device is threadedly connected with sensor plate fixing bolts.

[0017] Furthermore, the rotating axis motor assembly includes a T-axis motor seat, a T-axis origin sensor is provided on one side of the T-axis motor seat, a T-axis motor is installed on the T-axis motor seat, the output end of the T-axis motor passes through the T-axis motor seat and is connected to a synchronous wheel for transmission, a T-axis origin sensing plate is provided on the top of the synchronous wheel, a synchronous belt is sleeved on the synchronous wheel, and the other end of the synchronous belt is sleeved on the rotating axis synchronous wheel.

[0018] Furthermore, the small Z-axis assembly includes a T-axis bearing seat and a small Z-axis guide seat, the T-axis motor is installed on the small Z-axis guide seat, two groups of small Z-axis cross roller guides are arranged between the T-axis bearing seat and the small Z-axis guide seat, a T-axis bearing is installed on the T-axis bearing seat, and a bearing cover is installed at the bottom of the T-axis bearing.

[0019] Furthermore, a first terminal is provided on the small Z-axis guide seat, a spring accommodating hole is provided on the small Z-axis guide seat, a thread is provided on the inner wall of the spring accommodating hole, a spring is provided in the spring accommodating hole, a spring is provided at the top of the spring, a spring adjusting nut I and a spring adjusting nut II are provided, the spring adjusting nut I is used to adjust the spring compression to zero position, the spring adjusting nut II is used to lock the adjusted spring compression, a spring positioning blind hole is provided on the T-axis bearing seat, and the spring positioning blind hole and the spring fit each other.

[0020] Furthermore, a mounting hole is provided on the T-axis bearing seat, a contact is provided in the mounting hole, two sets of insulating sleeves are sleeved on the contact, the threaded rod end of the contact is threadedly connected with a nut, and the bottom end of the nut is clamped with a second terminal.

[0021] Furthermore, the A nozzle is fixedly connected to the bottom end of the A nozzle fixing plate, and the B nozzle is fixedly connected to the bottom end of the B nozzle fixing plate. Both the A nozzle and the B nozzle are provided with air pipe joints, and the other ends of the two groups of air pipe joints are connected to a vacuum air path. Both the A nozzle and the B nozzle are provided with a vacuum channel connected to the air joint head.

[0022] The beneficial effects of the present invention are:

[0023] 1. The eccentric shaft is driven to rotate by the AB switching motor, so that the bearing coupling rotates in the first waist-shaped hole, thereby adjusting the relative position of the A nozzle fixing plate and the B nozzle fixing plate, so that the position of the A nozzle fixing plate in the Z-axis direction is switched, and the A nozzle and the B nozzle are aligned in the mold to pick up the Clip position, the A nozzle is in the Clip mounting position, and the B nozzle is in the Clip mounting position. Switch back and forth to achieve: "pick up the Clip from the mold → visual inspection → mount the two groups of Clips on the Leadframe twice". By realizing the A / B two groups of Clips in the mold once, and then mounting the A / B two groups of copper clips on the lead frame twice, the equipment investment cost is reduced, while taking into account high UPH, and improving the equipment investment cost-effectiveness.

[0024] 2. The T-axis motor drives the synchronous wheel to rotate, so that the synchronous belt drives the rotating shaft synchronous wheel to rotate synchronously, so that the rotating shaft assembly drives the A&B nozzle set to rotate. The T-axis origin sensor and the T-axis origin sensor cooperate to monitor the rotation angle, so that the rotation angle reaches the preset value, effectively improving the accuracy of the angle switching between the A nozzle and the B nozzle.

[0025] 3. By inserting the spring into the spring accommodating hole and positioning the bottom of the spring in the spring positioning blind hole, by sequentially installing the spring adjusting nut I and the spring adjusting nut II into the spring accommodating hole, the spring adjusting nut I adjusts the spring compression to zero position, and the spring adjusting nut II locks the adjusted spring compression. The adjustment of the spring pre-compression can realize the pressure adjustment of the copper clip welding head when picking up and mounting the Clip, so that the pressure value meets different processing requirements, effectively improving the practicality of the mechanism.

[0026] 4. The contact is in normally closed contact with the small Z-axis guide seat body through the tension of the spring. When the copper clip pick-and-place head picks up the Clip and mounts the Clip, the Z-axis moves downward, causing the small Z-axis to move upward, thereby opening the contact. A contact signal is output to let the software sense that the contact is in an open state, guiding the software to take the next step, effectively improving the degree of automation of the mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 A schematic diagram of the main structure of an embodiment of the present invention is shown;

[0029] Figure 2 An exploded schematic diagram of a main structure according to an embodiment of the present invention is shown;

[0030] Figure 3 An exploded schematic diagram of a rotating shaft assembly according to an embodiment of the present invention is shown;

[0031] Figure 4 An exploded schematic diagram of an A&B nozzle alignment origin device according to an embodiment of the present invention is shown;

[0032] Figure 5 An exploded schematic diagram of a rotating shaft motor assembly according to an embodiment of the present invention is shown;

[0033] Figure 6 An exploded schematic diagram of a small Z-axis assembly according to an embodiment of the present invention is shown;

[0034] Figure 7 The embodiment of the present invention is shown Figure 6 The enlarged schematic diagram at A in the middle;

[0035] Figure 8 A schematic diagram of an A&B nozzle set according to an embodiment of the present invention is shown.

[0036] In the figure: 1. Pick-up and placement of welding head mounting bracket; 2. Small Z-axis assembly; 201. T-axis bearing seat; 202. Small Z-axis guide seat; 203. T-axis bearing; 204. Bearing cover; 205. Small Z-axis cross roller guide; 206. Spring receiving hole; 207. Spring; 208. Spring adjustment nut I; 209. Spring adjustment nut II; 2010. First wiring terminal; 2011. Mounting hole; 2012. Insulating sleeve; 2013. Contact; 2014. Second wiring terminal; 2015. Nut; 2016. Spring positioning blind hole; 3. Rotating axis motor assembly; 301. T-axis motor seat; 302. T-axis motor; 303. T-axis origin sensor; 304. Synchronous wheel; 305. T-axis origin sensor; 306 , synchronous belt; 4, rotating shaft assembly; 401, B nozzle fixing plate; 402, A nozzle fixing plate; 403, AB nozzle up and down switching guide rail; 404, first waist-shaped hole; 405, A&B nozzle alignment origin device; 4051, origin device base; 4052, origin alignment sensor plate; 4053, origin crankshaft; 4054, second waist-shaped hole; 4055, adjustment bearing; 4056, E-shaped retaining ring; 4057, sensor plate fixing bolt; 4058, bearing hole; 406, A&B nozzle alignment origin sensor; 407, AB switching motor; 408, eccentric shaft; 409, bearing; 5, A&B nozzle set; 501, A nozzle; 502, B nozzle; 503, air pipe joint; 6, rotating shaft synchronous wheel. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] The embodiment of the present invention provides a copper clamp pick-up and placement welding head mechanism for semiconductor clamp welding equipment, including a pick-up and placement welding head mounting bracket 1; illustratively, as Figure 1 and Figure 2 shown.

[0039] The pick-and-place welding head mounting bracket 1 is mounted on the Z axis of the bonding head mechanism, a small Z axis assembly 2 is mounted on the pick-and-place welding head mounting bracket 1, a rotating shaft motor assembly 3 is mounted on the top of the small Z axis assembly 2, a rotating shaft motor assembly 3 is transmission-connected with a rotating shaft synchronous wheel 6, the rotating shaft synchronous wheel 6 is mounted on the small Z axis assembly 2, a rotating shaft assembly 4 is mounted on the bottom end of the small Z axis assembly 2, the rotating shaft assembly 4 is transmission-connected with the rotating shaft synchronous wheel 6, and an A&B nozzle set 5 is mounted on the bottom end of the rotating shaft assembly 4;

[0040] Specifically, the entire copper clip welding head picking and placing mechanism is installed on the Z axis of the welding head mechanism through the welding head picking and placing mounting bracket 1, the small Z axis assembly 2 is assembled together with the welding head picking and placing mounting bracket 1, and the rotating axis motor assembly 3 and the rotating axis assembly 4 are connected by transmission through the rotating axis synchronization wheel 6.

[0041] For example, Figure 3 shown.

[0042] The rotating shaft assembly 4 includes a B nozzle fixing plate 401 and an A nozzle fixing plate 402, the rotating shaft synchronization wheel 6 is installed on the B nozzle fixing plate 401, and two groups of AB nozzle up and down switching guide rails 403 are symmetrically installed on one side of the B nozzle fixing plate 401, and the other ends of the two groups of AB nozzle up and down switching guide rails 403 are connected to the A nozzle fixing plate 402;

[0043] An A&B nozzle alignment origin device 405 is installed on the A nozzle fixing plate 402, an A&B nozzle alignment origin sensor 406 is installed on one side of the B nozzle fixing plate 401 and at one end close to the A nozzle fixing plate 402, an AB switching motor 407 is installed on the other side of the B nozzle fixing plate 401, an eccentric shaft 408 is transmission-connected to the output end of the AB switching motor 407, a bearing 409 is installed after the other end of the eccentric shaft 408 penetrates the B nozzle fixing plate 401, and a first waist-shaped hole 404 is opened on the A nozzle fixing plate 402, and the first waist-shaped hole 404 is coupled to the bearing 409;

[0044] Specifically, the eccentric shaft 408 is driven to rotate by the AB switching motor 407, so that the bearing 409 is coupled to rotate in the first waist-shaped hole 404, thereby adjusting the relative positions of the A nozzle fixing plate 402 and the B nozzle fixing plate 401, so that the A nozzle fixing plate 402 can be switched to the "position above the origin", "origin alignment position" and "position below the origin" in the Z-axis direction respectively.

[0045] The A&B nozzle alignment origin device 405 includes an origin device base 4051, an origin alignment sensor sheet 4052 and an origin crankshaft 4053; illustratively, Figure 4 shown.

[0046] The origin alignment induction sheet 4052 is plugged into the origin device base 4051, a second waist-shaped hole 4054 is provided on the origin alignment induction sheet 4052, the origin crankshaft 4053 is coupled with the second waist-shaped hole 4054, two groups of bearing holes 4058 are provided on the origin device base 4051, two groups of adjusting bearings 4055 are sleeved on the origin crankshaft 4053, the two groups of adjusting bearings 4055 are movably fitted with the two groups of bearing holes 4058 respectively, both ends of the origin crankshaft 4053 are clamped with E-shaped retaining springs 4056, the two groups of E-shaped retaining springs 4056 are respectively fitted with the two groups of adjusting bearings 4055, both side end surfaces of the origin crankshaft 4053 are provided with straight grooves, and the origin device base 4051 is threadedly connected with induction sheet fixing bolts 4057;

[0047] Specifically, a flat-blade screwdriver is inserted into the straight groove on one end face of the origin crankshaft 4053, and the flat-blade screwdriver is used to drive the origin crankshaft 4053 to rotate. The origin crankshaft 4053 is coupled with the second waist-shaped hole 4054, so that the origin crankshaft 4053 can rotate and at the same time drive the origin alignment sensor plate 4052 to move up and down in the origin device base 4051, thereby adjusting the height of the origin alignment sensor plate 4052. After the adjustment is completed, the position of the origin alignment sensor plate 4052 is fixed by the sensor plate fixing bolt 4057.

[0048] The rotating shaft motor assembly 3 includes a T-axis motor seat 301; illustratively, as Figure 5 shown.

[0049] A T-axis origin sensor 303 is provided on one side of the T-axis motor seat 301, a T-axis motor 302 is installed on the T-axis motor seat 301, an output end of the T-axis motor 302 passes through the T-axis motor seat 301 and is connected to a synchronous wheel 304, a T-axis origin induction sheet 305 is provided on the top of the synchronous wheel 304, a synchronous belt 306 is sleeved on the synchronous wheel 304, and the other end of the synchronous belt 306 is sleeved on the rotating shaft synchronous wheel 6;

[0050] Specifically, the T-axis motor 302 drives the synchronous wheel 304 to rotate, so that the synchronous belt 306 drives the rotating shaft synchronous wheel 6 to rotate synchronously, so that the rotating shaft assembly 4 drives the A&B nozzle set 5 to rotate, and the rotation angle is monitored by the T-axis origin sensor 303 to ensure that the rotation angle reaches a preset value.

[0051] The small Z-axis assembly 2 includes a T-axis bearing seat 201 and a small Z-axis guide seat 202; for example, Figure 6 and Figure 7 shown.

[0052] The T-axis motor 302 is installed on the small Z-axis guide rail seat 202, two sets of small Z-axis cross roller guide rails 205 are arranged between the T-axis bearing seat 201 and the small Z-axis guide rail seat 202, a T-axis bearing 203 is installed on the T-axis bearing seat 201, and a bearing pressure cover 204 is installed at the bottom of the T-axis bearing 203;

[0053] The small Z-axis guide rail seat 202 is provided with a first terminal 2010, the small Z-axis guide rail seat 202 is provided with a spring receiving hole 206, the inner wall of the spring receiving hole 206 is provided with a thread, a spring 207 is provided in the spring receiving hole 206, the top of the spring 207 is provided with a spring adjusting nut I208 and a spring adjusting nut II209, the spring adjusting nut I208 is used to adjust the compression amount of the spring 207 to zero, the spring adjusting nut II209 is used to lock the adjusted compression amount of the spring 207, the T-axis bearing seat 201 is provided with a spring positioning blind hole 2016, and the spring positioning blind hole 2016 and the spring 207 are fitted with each other;

[0054] Specifically, by inserting the spring 207 into the spring accommodating hole 206, and positioning the bottom of the spring 207 in the spring positioning blind hole 2016, and by sequentially installing the spring adjusting nut I208 and the spring adjusting nut II209 into the spring accommodating hole 206, the spring adjusting nut I208 adjusts the spring compression to zero position, and the spring adjusting nut II209 locks the adjusted spring compression. The adjustment of the pre-compression of the spring 207 can realize the pressure adjustment of the copper clip welding head when picking up and mounting the Clip.

[0055] The T-axis bearing seat 201 is provided with a mounting hole 2011, in which a contact 2013 is provided, and two sets of insulating sleeves 2012 are sleeved on the contact 2013. The threaded rod end of the contact 2013 is threadedly connected with a nut 2015, and the bottom end of the nut 2015 is clamped with a second terminal 2014;

[0056] Specifically, the tension of spring 207 makes contact 2013 and the body of small Z-axis guide seat 202 normally closed. When the copper clip pick-and-place head is picking up Clip and mounting Clip, the Z-axis moves downward, causing the small Z-axis to move upward, thereby opening contact 2013, and outputting a contact signal to let the software sense that contact 2013 is in an open state, guiding the software to take the next step.

[0057] The A&B nozzle set 5 includes an A nozzle 501 and a B nozzle 502; illustratively, Figure 8 shown.

[0058] The A suction nozzle 501 is fixedly connected to the bottom end of the A suction nozzle fixing plate 402, and the B suction nozzle 502 is fixedly connected to the bottom end of the B suction nozzle fixing plate 401. The A suction nozzle 501 and the B suction nozzle 502 are both provided with air pipe joints 503, and the other ends of the two groups of air pipe joints 503 are both connected with a vacuum air path. The A suction nozzle 501 and the B suction nozzle 502 are both provided with a vacuum channel connected to the air joint head;

[0059] Specifically, the cut Clip is sucked in the mold by the A suction nozzle 501 and the B suction nozzle 502 .

[0060] The copper clip pick-up and placement welding head mechanism of the semiconductor clamp welding equipment proposed by the present invention has the following working principle:

[0061] The entire copper clip welding head picking and placing mechanism is installed on the Z axis of the welding head mechanism through the welding head picking and placing mounting bracket 1. The small Z axis assembly 2 is assembled together with the welding head picking and placing mounting bracket 1, and the rotating axis motor assembly 3 and the rotating axis assembly 4 are connected by transmission through the rotating axis synchronous wheel 6.

[0062] The eccentric shaft 408 is driven to rotate by the AB switching motor 407, so that the bearing 409 is coupled to rotate in the first waist hole 404, thereby adjusting the relative position of the A nozzle fixing plate 402 and the B nozzle fixing plate 401, so that the A nozzle fixing plate 402 can be switched to the "position above the origin", "position aligned with the origin" and "position below the origin" in the Z-axis direction, that is, the A nozzle and the B nozzle are aligned in the mold to pick up the Clip position, the A nozzle is in the Clip mounting position, and the B nozzle is in the Clip mounting position. Switching back and forth to achieve: "pick up the Clip from the mold → visual inspection → mount the two groups of Clips on the Leadframe twice".

[0063] Insert a flat-blade screwdriver into the straight groove on one end face of the origin crankshaft 4053, drive the origin crankshaft 4053 to rotate by the flat-blade screwdriver, and couple the origin crankshaft 4053 with the second waist-shaped hole 4054 so that the origin crankshaft 4053 can rotate and drive the origin alignment sensor plate 4052 to move up and down in the origin device base 4051, thereby adjusting the height of the origin alignment sensor plate 4052. After the adjustment is completed, fix the position of the origin alignment sensor plate 4052 by the sensor plate fixing bolt 4057.

[0064] The T-axis motor 302 drives the synchronous wheel 304 to rotate, so that the synchronous belt 306 drives the rotating shaft synchronous wheel 6 to rotate synchronously, so that the rotating shaft assembly 4 drives the A&B nozzle set 5 to rotate, and the T-axis origin sensor 303 cooperates with the T-axis origin sensor sheet 305 to monitor the rotation angle so that the rotation angle reaches the preset value.

[0065] By inserting the spring 207 into the spring accommodating hole 206, and positioning the bottom of the spring 207 in the spring positioning blind hole 2016, and by sequentially installing the spring adjusting nut I208 and the spring adjusting nut II209 into the spring accommodating hole 206, the spring adjusting nut I208 adjusts the spring compression to zero position, and the spring adjusting nut II209 locks the adjusted spring compression. The adjustment of the pre-compression of the spring 207 can realize the pressure adjustment of the copper clip welding head when picking up and mounting the Clip.

[0066] The tension of spring 207 makes contact 2013 and the body of small Z-axis guide seat 202 normally closed. When the copper clip pick-and-place head is picking up Clip and mounting Clip, the Z-axis moves downward, causing the small Z-axis to move upward, thereby opening contact 2013, and outputting a contact signal to let the software sense that contact 2013 is in an open state, guiding the software to take the next step.

[0067] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein; and these modifications or substitutions do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A copper clamp welding head pick-up and placement mechanism for semiconductor clamp welding equipment, comprising a welding head pick-up and placement mounting bracket (1), characterized in that: A small Z-axis assembly (2) is mounted on the pick-and-place welding head mounting bracket (1), and a rotating shaft motor assembly (3) is mounted on the top of the small Z-axis assembly (2); a rotating shaft synchronous wheel (6) is transmission-connected to the rotating shaft motor assembly (3), and a rotating shaft assembly (4) is mounted on the bottom end of the small Z-axis assembly (2); the rotating shaft assembly (4) is transmission-connected to the rotating shaft synchronous wheel (6), and an A&B nozzle set (5) is mounted on the bottom end of the rotating shaft assembly (4), and the A&B nozzle set (5) comprises an A nozzle (501) and a B nozzle (502); the rotating shaft assembly (4) comprises a B nozzle fixing plate (401) and an A nozzle fixing plate (402), an AB switching motor (407) is mounted on one side of the B nozzle fixing plate (401), and an eccentric shaft (408) is transmission-connected to the output end of the AB switching motor (407); The eccentric shaft (408) is driven to rotate by the AB switching motor (407), driving the A suction nozzle (501) and the B suction nozzle (502) to switch positions, so as to achieve one-time punching of the A / B groups of Clips in the mold, and then mounting the A / B groups of copper clips on the lead frame in two times; The rotating shaft synchronous wheel (6) is mounted on the B nozzle fixing plate (401); two sets of AB nozzle up and down switching guide rails (403) are symmetrically mounted on one side of the B nozzle fixing plate (401); the other ends of the two sets of AB nozzle up and down switching guide rails (403) are connected to the A nozzle fixing plate (402); the other end of the eccentric shaft (408) passes through the B nozzle fixing plate (401) and is mounted with a bearing (409); a first waist-shaped hole (404) is opened on the A nozzle fixing plate (402); the first waist-shaped hole (404) is coupled to the bearing (409); The rotating shaft motor assembly (3) comprises a T-axis motor seat (301), and a T-axis motor (302) is mounted on the T-axis motor seat (301); The small Z-axis assembly (2) comprises a T-axis bearing seat (201) and a small Z-axis guide seat (202); the T-axis motor (302) is mounted on the small Z-axis guide seat (202); two groups of small Z-axis cross roller guides (205) are arranged between the T-axis bearing seat (201) and the small Z-axis guide seat (202); a T-axis bearing (203) is mounted on the T-axis bearing seat (201); and a bearing pressure cover (204) is mounted on the bottom of the T-axis bearing (203); The small Z-axis guide rail seat (202) is provided with a first wiring terminal (2010), the small Z-axis guide rail seat (202) is provided with a spring receiving hole (206), the inner wall of the spring receiving hole (206) is provided with a thread, a spring (207) is provided in the spring receiving hole (206), a spring adjustment nut I (208) and a spring adjustment nut II (209) are provided at the top end of the spring (207), the spring adjustment nut I (208) is used to adjust the compression amount of the spring (207) to zero position, and the spring adjustment nut II (209) is used to lock the adjusted compression amount of the spring (207), and a spring positioning blind hole (2016) is provided on the T-axis bearing seat (201), and the spring positioning blind hole (2016) and the spring (207) are fitted with each other.

2. The copper clip welding head pick-up and placement mechanism of the semiconductor clamp welding equipment according to claim 1 is characterized in that: The A nozzle fixing plate (402) is provided with an A&B nozzle alignment origin device (405). An A&B nozzle alignment origin sensor (406) is installed on one side of the B nozzle fixing plate (401) and at one end close to the A nozzle fixing plate (402).

3. The copper clip welding head pick-up and placement mechanism of the semiconductor clamp welding equipment according to claim 2, characterized in that: The A&B nozzle alignment origin device (405) comprises an origin device base (4051), an origin alignment sensing sheet (4052) and an origin crankshaft (4053); the origin alignment sensing sheet (4052) is plugged into the origin device base (4051); a second waist-shaped hole (4054) is provided on the origin alignment sensing sheet (4052); and the origin crankshaft (4053) is coupled to the second waist-shaped hole (4054).

4. The copper clip welding head pick-up and placement mechanism of the semiconductor clamp welding equipment according to claim 3 is characterized in that: Two groups of bearing holes (4058) are provided on the origin device base (4051), and two groups of adjusting bearings (4055) are sleeved on the origin crankshaft (4053). The two groups of adjusting bearings (4055) are movably fitted with the two groups of bearing holes (4058) respectively. Both ends of the origin crankshaft (4053) are clamped with E-shaped retaining springs (4056), and the two groups of E-shaped retaining springs (4056) are respectively fitted with the two groups of adjusting bearings (4055). Both side end surfaces of the origin crankshaft (4053) are provided with straight grooves, and the origin device base (4051) is threadedly connected with an induction plate fixing bolt (4057).

5. The copper clip welding head pick-up and placement mechanism of the semiconductor clamp welding equipment according to claim 1, characterized in that: A T-axis origin sensor (303) is arranged on one side of the T-axis motor seat (301); an output end of the T-axis motor (302) passes through the T-axis motor seat (301) and is connected to a synchronous wheel (304); a T-axis origin sensing sheet (305) is arranged on the top of the synchronous wheel (304); a synchronous belt (306) is sleeved on the synchronous wheel (304); and the other end of the synchronous belt (306) is sleeved on the rotating shaft synchronous wheel (6).

6. The copper clip welding head pick-up and placement mechanism of the semiconductor clamp welding equipment according to claim 1, characterized in that: The T-axis bearing seat (201) is provided with a mounting hole (2011), a contact (2013) is arranged in the mounting hole (2011), two groups of insulating sleeves (2012) are sleeved on the contact (2013), a nut (2015) is threadedly connected to the threaded rod end of the contact (2013), and a second wiring terminal (2014) is clamped at the bottom end of the nut (2015).

7. The copper clip welding head pick-up and placement mechanism of the semiconductor clamp welding equipment according to claim 1, characterized in that: The A suction nozzle (501) is fixedly connected to the bottom end of the A suction nozzle fixing plate (402), and the B suction nozzle (502) is fixedly connected to the bottom end of the B suction nozzle fixing plate (401). Both the A suction nozzle (501) and the B suction nozzle (502) are provided with air pipe joints (503), and the other ends of the two sets of air pipe joints (503) are connected to a vacuum air path. Both the A suction nozzle (501) and the B suction nozzle (502) are provided with vacuum channels connected to the air joint heads.

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