CN115121900B

CN115121900B - Solder conveying device

Info

Publication number: CN115121900B
Application number: CN202210876565.0A
Authority: CN
Inventors: 林海涛; 赵凯; 梁猛; 蔡孙彬; 程坤喜
Original assignee: Shanghai Shiyu Precision Equipment Co ltd
Current assignee: Shanghai Shiyu Precision Equipment Co ltd
Priority date: 2022-07-25
Filing date: 2022-07-25
Publication date: 2023-04-14
Anticipated expiration: 2042-07-25
Also published as: CN115121900A

Abstract

A solder feeding device comprising a solder feeding tray for feeding a solder wire forward to a solder cutting unit and a solder cutting unit provided on a front side of the solder feeding tray, the solder cutting unit comprising: the static chuck is used for horizontally clamping the welding rod up and down; the movable chuck is used for horizontally clamping the welding rod up and down at the initial position and horizontally pulling the head end of the welding rod forward to the cutting position of the cutter or releasing the welding rod and returning to the initial position, the movable chuck is arranged on the front side of the static chuck, and the movable chuck and the static chuck clamp or release the welding rod in a staggered manner; and the cutter is used for cutting off the welding rod and is arranged on the front side of the movable chuck. The method can ensure that the soldering lug cut each time is within the target precision, and is suitable for scenes with higher requirements on the soldering lug precision.

Description

Solder conveying device

Technical Field

The invention belongs to the technical field of surface mounting, and particularly relates to a solder conveying device.

Background

In the mounting process, the welding rod is cut into soldering lugs by a welding material conveying device, the soldering lugs are supplied to a mechanical arm, and the soldering lugs are placed on a substrate by the mechanical arm to serve as the welding material for mounting.

The traditional solder conveying device can not ensure the precision of soldering lugs and can not be suitable for scenes with high requirements on the precision of the soldering lugs.

Disclosure of Invention

In view of the above, a solder transfer device with high solder piece accuracy is provided.

In order to solve the technical problems, the invention adopts the following technical scheme:

a solder feeding device, comprising a solder feeding tray for feeding a welding rod forward to a solder cutting unit and a solder cutting unit provided on a front side of the solder feeding tray, the solder cutting unit comprising:

the static chuck is used for horizontally clamping the welding rod up and down;

the movable chuck is used for horizontally clamping the welding rod up and down at the initial position and horizontally pulling the head end of the welding rod forward to the cutting position of the cutter or releasing the welding rod and returning to the initial position, the movable chuck is arranged on the front side of the static chuck, and the movable chuck and the static chuck clamp or release the welding rod in a staggered manner;

and the cutter is used for cutting off the welding rod and is arranged on the front side of the movable chuck.

The static chuck and the movable chuck can alternately clamp or release the welding rod, so that when the movable chuck clamps the welding rod at the initial position and horizontally forwards pulls the head end of the welding rod to the cutting position of the cutter, the static chuck is in a release state, and after one-time cutting is finished, when the movable chuck releases the welding rod and returns to the initial position, the static chuck is in a clamping state and always keeps the position of the welding rod when the welding rod is cut, thereby ensuring that the welding piece cut each time is within the target precision, and being suitable for scenes with higher requirements on the welding piece precision.

Drawings

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

FIG. 2 is a schematic structural view of a solder cut-off unit according to the present invention;

FIG. 3 is a side view of the cutter of the present invention;

FIG. 4 is a cross-sectional view of a static chuck of the present invention;

FIG. 5 is a schematic perspective view of a second stationary block and a second movable block of the dynamic chuck according to the present invention;

FIG. 6 is a schematic structural diagram of a second stationary block and a second movable block of the dynamic chuck according to the present invention;

FIG. 7 is a cross-sectional view C-C of FIG. 6;

fig. 8 is a perspective view of the internal structure of the first housing according to the present invention;

fig. 9 is a schematic structural view of the internal structure of the first casing of the present invention;

FIG. 10 is a bottom view of the second housing of the present invention;

FIG. 11 is a schematic view of a connection structure of a lead screw and a second movable block according to the present invention;

FIG. 12 is a schematic view of the first lower motor of the present invention fixed to a motor frame;

fig. 13 is a schematic structural view of the patch device.

Detailed Description

The embodiments of the present invention will be described below with reference to the drawings attached to the specification. It should be noted that the embodiments mentioned in the present description are not exhaustive and do not represent the only embodiments of the present invention. The following examples are given for the purpose of clearly illustrating the inventive contents of the present patent application and are not intended to limit the embodiments thereof. It will be apparent to those skilled in the art that various changes and modifications can be made in the embodiment without departing from the spirit and scope of the invention, and it is intended to cover all such changes and modifications as fall within the true spirit and scope of the invention.

As shown in fig. 1, the present embodiment provides a solder feeding apparatus including a solder feed tray 1100 for feeding a welding wire 2 forward to a solder cut-off unit 1200, and the solder cut-off unit 1200 provided on the front side of the solder feed tray 1100.

The solder transfer tray 1100 includes a fixing plate 1110, an unwinding roller 1120, and three guide rollers 1130, the fixing plate 1110 is vertically arranged and faces the left and right direction, the unwinding roller 1120 and the three guide rollers 1130 are sequentially rotated and fixed to the front surface of the fixing plate 1110 from back to front, during feeding, a welding rod is wound on the unwinding roller 1120, and the welding rod 2 wound on the welding rod is horizontally introduced into the solder cutting unit 1200 through the three guide rollers 1130.

In order to keep the tightness of the welding rod 2 in a proper state and avoid that the welding rod is too loose or too tight to influence the precision of the welding tip, a welding rod tightness adjusting mechanism is arranged on the welding flux conveying disc 1100.

As shown in fig. 1, the wire slack adjuster mechanism includes a weight 1141, a travel port 1142, a first sensor 1143, a second sensor 1144, and a drive wheel (not shown).

The weight 1141 is used to press on the passing welding wire 2, and the stroke hole 1142 is used to move the weight 1141 up and down, which is formed on the fixing plate 1110 and located between the two guide rollers 1130.

The first sensor 1143 and the second sensor 1144 are fixed on the fixing plate 1110, the first sensor 1143 is lower than the second sensor 1144 and both are located at the rear side of the stroke hole 1142, or both can be located at the front side of the stroke hole 1142, and the first sensor 1143 and the second sensor 1144 are used for sensing the welding rod 2.

The driving wheel is disposed on the back surface of the fixing plate 1110 for driving the unwinding roller 1120 according to the signal of the first sensor 1143 or the second sensor 1144.

When the first sensor 1143 senses the welding rod, it indicates that the welding rod 2 is too loose, and the driving wheel rotates reversely to drive the unwinding roller 1120 to adjust the tightness of the welding rod 2 to a proper state.

When the second sensor 1144 senses the welding rod, it indicates that the welding rod 2 is too tight, and the driving wheel rotates forward to drive the unwinding roller 1120 to adjust the tightness of the welding rod 2 to a proper state.

As shown in fig. 2, the solder cutting unit 1200 includes a static collet 1210, a dynamic collet 1220, and a cutter 1230.

The static chuck 1210 is used for horizontally clamping the welding rod 2 up and down, the movable chuck 1220 is used for horizontally clamping the welding rod 2 up and down and horizontally moving back and forth, and the static chuck 1210 and the movable chuck 1220 are staggered to clamp or release the welding rod.

The cutting knife 1230 for cutting the welding wire is provided at the front side of the movable jaw 1220.

During operation, the static chuck 1210 is in a release state, the movable chuck 1220 clamps the head of the welding rod 2 at an initial position, and horizontally and forwards pulls the head end of the welding rod 2 to the cutting position of the cutting knife 1230 for the cutting knife 1230 to cut.

It should be noted that, when the tip end of the welding rod 2 is located at the cutting position, the front end face of the tip end is located at the front side of the cutting edge of the cutting knife 1230, and the distance L between the front end face and the cutting edge is the length of the soldering lug cut off from the welding rod 2.

After the cutting is finished once, the movable chuck 1220 releases the welding rod and returns to the initial position, in the process, the static chuck 1210 clamps the welding rod 2 and always keeps the position of the welding rod when the welding rod is cut, and when the movable chuck 1220 pulls the head end of the welding rod 2 to the cutting position again, the distance L is within the target precision (+/-0.02 mm), so that the welding piece cut each time is guaranteed to be within the target precision.

The static chuck 1210 comprises a first static block 1211, a first movable block 1212 and a first mechanism for driving the first movable block 1212 to move up and down on the first static block 1211, and the movable chuck 1220 comprises a second static block 1221, a second movable block 1222, a second mechanism for driving the second movable block 1222 to move up and down on the second static block 1221 and a third mechanism for driving the second static block 1221 to move horizontally and back.

As shown in fig. 2, the top surface of the first stationary block 1211 is provided with a stopper 1211a and a stopper post 1211b which are distributed left and right, and the top surface of the second stationary block 1221 is provided with a stopper 1221a and a stopper post 1221b which are distributed left and right, so that a passage for the welding rod 2 to pass through horizontally is formed on the top surfaces of the first stationary block 1211 and the second stationary block 1221.

The cutter 1230 includes a stationary blade 1231, a movable blade 1232 disposed in front of the stationary blade 1231, a cutter holder 1233, and a fourth mechanism for driving the cutter holder 1233 to go up and down, the stationary blade 1231 is vertically disposed and faces the front-back direction, a material opening 1231a corresponding to the above channel and allowing the welding rod 2 to pass horizontally is formed on the stationary blade 1231, the movable blade 1232 is detachably inserted horizontally in the cutter groove of the cutter holder 1233, as shown in fig. 3, a cutting edge 1232a is formed at the rear end of the movable blade 1232, and the cutting edge 1232a is attached to the stationary blade 1231 and located on the lower side of the material opening 1231 a. When the cutter 1230 is operated, the fourth mechanism drives the cutter holder 1233 to ascend, so as to drive the movable blade 1232 to ascend, so that the welding rod 2 is cut off from bottom to top by the cutting edge 1232a, and after the cutting action is completed, the fourth mechanism drives the cutter holder 1233 to descend, so as to return the movable blade 1232 to the original position.

In order to overcome the problem that the cutting edge 1232a is worn during operation, so that the cutting edge 1232a cannot be attached to the fixed blade 1231, which affects the cutting accuracy, a spring pressing piece 1235 is disposed at the front end of the movable blade 1232, the spring pressing piece 1235 applies backward pressure to the front end of the movable blade 1232, and the cutting edge 1232a of the movable blade 1232 is kept attached to the fixed blade 1231, as shown in fig. 2 and 3.

As shown in fig. 13, as a part of the mounter 3, the solder feeding device 1 is generally provided in plural, the plural solder feeding devices 1 are arranged at intervals in the left-right direction, the pitch is small, and it is not easy to load, and therefore, in the present embodiment, the static chuck 1210, the dynamic chuck 1220, and the cutter 1230 are divided into two parts, i.e., a lower part and an upper part, respectively, the power unit is provided in the first housing 1240, the execution unit is provided in the second housing 1250, the transmission unit is provided in the first housing 1240, and is provided in the second housing 1250, so that the solder cutting unit 1200 is composed of two modules, i.e., an upper module and a lower module.

As shown in fig. 8, the upper surface of the top plate of the first housing 1240 forms a front and rear pull-plug type socket 1245, and as shown in fig. 2, the lower surface of the bottom plate of the second housing 1250 forms a plug-in slot 1255 which is matched with the socket 1245, so that the second housing 1250 can be horizontally inserted into or withdrawn from the top of the first housing 1240 and can be locked by a locking mechanism after being inserted, but of course, the second housing 1250 can be detachably plugged into the top of the first housing 1240 in other forms.

As shown in fig. 1, the fixing plate 1110 is fixed to the second housing 1250 through bolts, and the fixing plate 1110 has a handle structure 1145 on the rear side thereof to apply a force to the fixing plate 1110, so that the solder delivery tray 1100 and the upper module of the solder cutting unit 1200 are detached from the lower module, and a solder roll is conveniently disposed on the solder delivery tray 1100 and a solder wire on the solder roll is led between the second stationary block 1221 and the second movable block 1222 of the movable clamp 1220.

Specifically, for the static chuck 1210, the first static block 1211 and the first dynamic block 1212 are disposed in the second housing 1250.

As shown in fig. 2, 4, 8 and 9, the first mechanism of the static chuck 1210 includes a first lower lift rod 1213a driven to the first upper lift rod 1213c, a first power source 1213b for driving the first lower lift rod 1213a to ascend and descend, a first upper lift rod 1213c, a first guide sleeve 1213d and a first spring 1213e, the first lower lift rod 1213a and the first power source 1213b are both disposed in a first housing 1240, the lower end of the first lower lift rod 1213a is connected to the first power source 1213b, the first power source 1213b is fixed to the first housing 1240, a first lower hole 1241 for the first lower lift rod 1213a to pass through is formed on the top plate of the first housing 1240, the first upper ejector 1213c, the first guide sleeve 1213d and the first spring 1213e are all disposed in the second housing 1250, the first upper ejector 1213c passes through the first stationary block 1211 from bottom to top, the upper end of the first upper ejector 1213c is connected to the first moving block 1212, the first guide sleeve 1213d is sleeved outside the first upper ejector 1213c, the first spring 1213e is sleeved outside the first upper ejector 1213c, the lower end of the first upper ejector 1213c is fixed to the lower end of the first upper ejector 1213d, the upper end of the first upper guide sleeve 1213d abuts against the lower end of the first upper ejector 1213d, and the bottom plate of the second housing 1250 has a first upper hole 1251 adapted to the first lower hole 1241 and corresponding to the first upper ejector 1213 c.

The first spring 1213e is initially in a compressed state, and its elastic force acts on the first upper ejector 1213c to pull the first movable block 1212 downward on the first stationary block 1211 to clamp the stationary chuck 1210, and when release is required, the first power source 1213b drives the first lower ejector 1213a to move upward to push the first upper ejector 1213c upward through the first lower hole 1241 and the first upper hole 1251, and the first upper ejector 1213c drives the first movable block 1212 to move upward to release the stationary chuck 1210, and when the first power source 1213b stops applying force, the stationary chuck 1210 returns to the clamped state under the action of the first spring 1213 e.

For the movable chuck 1220, the second stationary block 1221 and the second movable block 1222 are disposed in the second housing 1250.

As shown in fig. 2 and 7-9, the second mechanism of the movable chuck 1220 includes a second lower push rod 1223a for driving the second upper push rod 1223c, a second power source 1223b for driving the second lower push rod 1223a to ascend and descend, a second upper push rod 1223c, a second guide sleeve 1223d, and a second spring 1223e, the second lower push rod 1223a and the second power source 1223b are disposed in the first housing 1240, the lower end of the second lower push rod 1223a is connected to the second power source 1223b, the second power source 1223b is fixed to the bottom plate of the first housing 1240, the top plate of the first housing 1240 has a second lower hole 1242 for the second lower push rod 1223a to pass through up and down, the second upper supporting rod 1223c, the second guiding sleeve 1223d and the second spring 1223e are all disposed in the second housing 1250, the second upper supporting rod 1223c passes through the second stationary block 1221 from bottom to top, the upper end of the second upper supporting rod 1223c is connected to the second movable block 1222, the lower end of the second upper supporting rod 1221 c forms a step, the second guiding sleeve 1223d is sleeved outside the second upper supporting rod 1223c, the second spring 1223e is sleeved outside the second upper supporting rod 1223c, the lower end of the second spring 1223e is fixed on the step, the upper end of the second upper supporting rod 1223d abuts against the lower end of the second guiding sleeve 1223d, and the bottom plate of the second housing 1250 is provided with a second upper hole 1252 which is matched with the second lower hole and corresponds to the second upper supporting rod 1243 c.

The second spring 1223e is initially in a compressed state, and its elastic force acts on the second upper ejector 1223c to pull the second movable block 1222 downward on the second stationary block 1221, so that the movable chuck 1220 is in a clamped state, when it needs to be released, the second power source 1223b drives the second lower ejector 1223a to ascend, and pushes the second upper ejector 1223c upward through the second lower hole 1242 and the second upper hole 1252, the second upper ejector 1223c drives the second movable block 1222 to ascend, so as to release the movable chuck 1220, and when the second power source 1223b stops applying force, the movable chuck 1220 returns to the clamped state under the action of the second spring 1223 e.

As shown in fig. 8 to 12, the third mechanism of the movable chuck 1220 includes a lower gear 1224a for driving the upper gear 1224d, a first lower motor 1224b for driving the lower gear 1224a to rotate left and right, a lead screw 1224c, an upper gear 1224d, an articulation mount 1224e, a motor mount 1224f, and a third power source 1224g for driving the motor mount 1224f to swing up and down on the articulation mount 1224 e.

The first housing 1240 has a lower hole 1243 formed in a top plate thereof in a left-right direction, and a lower gear 1224a is vertically disposed and partially exposed from the lower hole 1243, the lower gear 1224a being fixed to a rotation shaft of a first lower motor 1224 b.

The hinge base 1224e is fixed to the first housing 1240, the motor frame 1224f is hinged to the hinge base 1224e through a hinge shaft in the front-rear direction, the motor frame 1224f has a vertical positioning pin 1224f-1, the first lower motor 1224b is fixed to the motor frame 1224f, the third power source 1224g is fixed to the bottom plate of the first housing 1240 and connected to the motor frame 1224f, and the top plate of the first housing 1240 has a positioning hole for positioning the positioning pin 1224 f-1.

The bottom plate of the second housing 1250 has an upper strip-shaped hole 1253 fitted with a lower strip-shaped hole 1243.

The screw 1224c is horizontally arranged in the front-rear direction, as shown in fig. 5 and 6, a connecting plate 1221a is formed on the rear side of the second stationary block 1221, a hole through which the shaft of the screw 1224c passes is formed in the connecting plate 1221a, and a nut block 1224c-1 of the screw 1224c is connected to the connecting plate 1221a of the second stationary block 1221 by a bolt, see fig. 11.

The upper gear 1224d is fixed to the shaft of the screw 1224c, and the upper gear 1224d is partially exposed from the upper strip-shaped hole 1253, so that the upper gear 1224d can be just engaged with the lower gear 1224a when the second housing 1250 is inserted on top of the first housing 1240.

In order to facilitate the insertion of the second housing 1250 and the first housing 1240, the motor frame 1224f can be driven by the third power source 1224g to swing downwards, so that the lower gear 1224a descends and avoids interference with the upper gear 1224d, after the insertion of the second housing 1250 and the first housing 1240 is completed, the third power source 1224g drives the motor frame 1224f to swing upwards, and after the positioning pin 1224f-1 is inserted into the positioning hole, the positioning pin abuts against the bottom plate of the second housing 1250 to complete the positioning of the lower gear 1224a, at this time, the upper gear 1224d can just mesh with the lower gear 1224a, and the gear cannot rotate due to too tight meshing is avoided.

Of course, the hinge holder 1224e, the motor holder 1224f and the third power source 1224g may be omitted, and the first lower motor 1224b may be directly fixed to the first housing 1240.

The first lower motor 1224b drives the lower gear 1224a to rotate, which drives the upper gear 1224d to rotate, so that the nut block 1224c-1 of the screw 1224c drives the second stationary block 1221 to move horizontally forward and backward, thereby achieving horizontal forward and backward movement of the movable chuck 1220.

When the second stationary block 1221 moves horizontally forward and backward, the second upper ejector rod 1223c is also driven to move horizontally forward and backward, so that after the position of the second upper ejector rod 1223c changes, the second lower ejector rod 1223a can still transmit the second upper ejector rod 1223c, and the length of the upper end face of the second lower ejector rod 1223a in the forward and backward direction is adapted to the stroke of the second upper ejector rod 1223c in the forward and backward direction.

For the cutting knife 1230, the stationary blade 1231, the movable blade 1232, and the knife holder 1233 are all disposed in the second housing 1250.

As shown in fig. 2, fig. 3, fig. 8, and fig. 9, the fourth mechanism of the cutter 1230 includes an eccentric 1234a, a second lower motor 1234b driving the eccentric 1234a to rotate left and right, a third lower push rod 1234c, a third upper push rod 1234d, an upper push block 1234e, a spring seat 1234f, and a third spring 1234g.

The eccentric 1234a, the second lower motor 1234b, and the third lower top bar 1234c are all disposed within the first housing 1240.

The eccentric 1234a is vertically disposed and fixed to a rotating shaft of a second lower motor 1234b, the second lower motor 1234b is fixed to the first housing 1240, a lower end of the third lower push rod 1234c contacts a top surface of the eccentric 1234a, and a top plate of the first housing 1240 has a third lower hole 1244 through which the third lower push rod 1234c passes up and down.

The upper top block 1234e, spring seat 1234f, third upper top 1234d, and third spring 1234g are all disposed within the second housing 1250.

The upper top block 1234e is fixed to the movable blade 1232, the lower portion of the upper top block 1234e has a C-shaped groove 1234e-1, the spring seat 1234f is C-shaped, the lower end of the spring seat 1234f is fixed to the bottom plate of the second housing 1250, the upper end of the spring seat extends into the C-shaped groove 1234e-1, the upper end of the third upper top bar 1234d passes through the lower end of the spring seat 1234f and is fixed to the bottom of the upper top block 1234e, the third spring 1234g is disposed in the C-shaped groove 1234e-1, the lower end of the third spring 1234g is fixed to the lower groove wall of the C-shaped groove 1234e-1, the upper end of the third spring seat 1234f abuts against, and the bottom plate of the second housing 1250 has a third upper hole 1254 which is matched with the third lower hole 1244 and corresponds to the third upper top bar 1234 d.

As shown in fig. 3, a spring retainer 1235 is bolted to the upper top block 1234 e.

When the rotating shaft of the second lower motor 1234b rotates, the eccentric 1234a is driven to rotate, due to the characteristics of the eccentric 1234a, the third lower push rod 1234C rises, the third lower push rod 1234C pushes the third upper push rod 1234d upwards through the third lower hole 1244 and the third upper hole 1254, the third upper push rod 1234d rises to drive the upper push block 1234e to rise, so that the knife rest 1233 drives the movable blade 1232 to perform a cutting operation, in this process, the lower groove wall of the C-shaped groove 1234e-1 of the upper push block 1234e upwards compresses the third spring 1234g, and after the second lower motor 1234b stops working, under the action of the third spring 1234g, the third upper push rod 1234d pulls the upper push block 1234e downwards to enable the movable blade 1232 to return to the original position.

In the present embodiment, as shown in fig. 8 to 10, the locking mechanism includes a locking head 1261, a fourth power source 1262 for driving the locking head 1261 to ascend and descend, and a locking hole 1263 corresponding to the locking head 1261.

The locking head 1261 is located on the upper side of the top plate of the first housing 1240, and the vertical section thereof is inverted trapezoidal, and the lower end of the locking head 1261 forms a rod portion 1261a passing downward through the top plate of the first housing 1240.

The fourth power source 1262 is fixed to the bottom plate of the first housing 1240 and is connected to the rod portion 1261a.

A locking hole 1263 is formed in the bottom of the second housing 1250, and is shaped to match the locking head 1261, and the bottom of the second housing 1250 has a notch 1256 extending from the front end of the bottom to the locking hole and allowing the rod part 1261a to pass back and forth, see fig. 2 and 9.

When the second housing 1250 is inserted into the top of the first housing 1240 horizontally, the rod portion 1261a moves to the lock hole 1263 through the notch 1256, the fourth power source 1262 drives the lock head 1261 to descend to be just matched with the lock hole 1263, so that the second housing 1250 is locked with the first housing 1240, and when the second housing 1250 needs to be drawn out from the top of the first housing 1240 horizontally, the lock head 1261 is driven by the fourth power source 1262 to ascend away from the lock hole 1263, and then the second housing 1250 is drawn out horizontally.

The first power source 1213b, the second power source 1223b, the third power source 1224g, and the fourth power source 1262 may employ electric cylinders or air cylinders.

It should be apparent to those skilled in the art that the above embodiments are only for illustrating the present invention and are not used as limitations of the present invention, and that changes and modifications to the above embodiments may fall within the scope of the appended claims within the spirit of the present invention.

Claims

1. A solder conveying device is characterized by comprising a solder conveying disc and a solder cutting unit, wherein the solder conveying disc is used for forwards unreeling welding rods to the solder cutting unit;

the welding flux conveying disc comprises a fixing plate, an unwinding roller, a plurality of guide rollers and a welding rod tightness adjusting mechanism, wherein the fixing plate is vertically arranged and faces the left and right direction, the unwinding roller and the guide rollers sequentially rotate from back to front and are fixed on the fixing plate, the welding rod tightness adjusting mechanism comprises a weight part, a stroke hole, a first sensor and a second sensor, the weight part is used for pressing on a passing welding rod, the stroke hole is used for enabling the weight part to move up and down, the first sensor and the second sensor are respectively used for sensing the welding rod, and a driving wheel is used for reversing according to a signal of the first sensor and rotating forward according to a signal of the second sensor to drive the unwinding roller, the stroke hole is formed in the fixing plate and is located between the two guide rollers, the first sensor and the second sensor are fixed on the fixing plate, the first sensor is lower than the second sensor, and the first sensor and the second sensor are located on the front side or the rear side of the stroke hole;

the solder cut-off unit includes:

the static chuck is used for horizontally clamping the welding rod up and down;

2. The solder conveying apparatus as claimed in claim 1, wherein the static chuck includes a first static block, a first moving block and a first mechanism for driving the first moving block to move up and down on the first static block, the moving chuck includes a second static block, a second moving block, a second mechanism for driving the second moving block to move up and down on the second static block and a third mechanism for driving the second static block to move horizontally back and forth, and top surfaces of the first static block and the second static block form a passage for the solder wire to pass horizontally back and forth.

3. The solder conveying device according to claim 2, wherein the cutter comprises a stationary blade, a movable blade, a knife rest and a fourth mechanism, the movable blade is arranged on the front side of the stationary blade, the fourth mechanism drives the knife rest to ascend and descend, the stationary blade is vertically arranged and faces the front and rear direction, a material opening corresponding to the channel and allowing the welding rod to horizontally pass through is formed in the stationary blade, the movable blade is horizontally fixed on the knife rest, a cutting edge is formed at the rear end of the movable blade, and the cutting edge is attached to the stationary blade and located on the lower side of the material opening.

4. The solder conveying device as claimed in claim 3, wherein the cutter further comprises a spring pressing piece for keeping the cutting edge of the movable blade against the stationary blade, the spring pressing piece applying a backward pressure to the front end of the movable blade.

5. The solder conveying device according to claim 4, wherein the solder cutting unit further comprises a first housing and a second housing, the second housing is detachably connected to the top of the first housing in an inserting manner, the first housing and the second housing are locked by a locking mechanism, the static chuck, the dynamic chuck and the cutter are respectively divided into an upper part and a lower part, the upper part and the lower part are respectively arranged in the first housing and the second housing, the fixing plate is fixed on the second housing, and a handle structure is arranged at the rear side of the fixing plate.

6. The solder conveying device according to claim 5, wherein the first stationary block and the first movable block are disposed in the second housing, the first mechanism includes a first lower lift rod for driving the first upper lift rod, a first power source for driving the first lower lift rod to move up and down, a first upper lift rod, a first guide sleeve and a first spring, the first lower lift rod and the first power source are disposed in the first housing, the lower end of the first lower lift rod is connected with the first power source, the first power source is fixed to the first housing, a first lower hole for the first lower lift rod to pass through is formed in a top plate of the first housing, the first upper lift rod, the first guide sleeve and the first spring are disposed in the second housing, the first upper lift rod passes through the first stationary block from bottom to top, the upper end of the first upper lift rod is connected with the first movable block, the first guide sleeve is sleeved outside the first upper lift rod, the first spring is sleeved outside the first upper lift rod, the lower end of the first upper lift rod is fixed to the first upper lift rod, the upper end of the first guide sleeve is connected with the first movable block, and the first upper guide sleeve is matched with the first lower end of the first upper lift rod and the first lower lift rod and the first upper lift rod is disposed in the first lower lift rod;

the second stationary block and the second movable block are arranged in the second shell, the second mechanism comprises a second lower ejector rod for driving the second upper ejector rod, a second power source for driving the second lower ejector rod to lift, a second upper ejector rod, a second guide sleeve and a second spring, the second lower ejector rod and the second power source are arranged in the first shell, the lower end of the second lower ejector rod is connected with the second upper ejector rod, the second power source is fixed with the bottom plate of the first shell, a second lower hole for the second lower ejector rod to pass through is formed in the top plate of the first shell, the second upper ejector rod, the second guide sleeve and the second spring are arranged in the second shell, the second upper ejector rod passes through the second stationary block from bottom to top, the upper end of the second upper ejector rod is connected with the second movable block, the lower end of the second upper guide sleeve is sleeved outside the second upper ejector rod, the second spring is sleeved outside the second upper ejector rod, the lower end of the second upper spring is fixed on the power source, the upper end of the second guide sleeve is matched with the lower end of the second guide sleeve, the upper end of the second upper ejector rod is matched with the upper hole of the second lower end of the second guide sleeve, and the second lower hole of the second shell is abutted against the second ejector rod;

the third mechanism is including lower gear, the drive that is used for driving the gear the first motor, lead screw and the last gear of rotation about the lower gear, have the lower bar hole of left right direction on the roof of first casing, the vertical arrangement of lower gear, and part follow the bar hole exposes down, and this lower gear is fixed in the pivot of first motor, first motor with first casing is fixed, have on the bottom plate of second casing with the last bar hole of bar hole adaptation down, lead screw fore-and-aft direction horizontal arrangement, its nut piece with the second stator is connected, it is fixed in to go up the gear the epaxial of lead screw, and this go up the gear part follow go up the bar hole exposes, the length of the up end of ejector pin under the second in the front and back direction and the stroke adaptation that the ejector pin moved in the front and back direction on the second.

The upper end of the spring seat penetrates through the upper end of the upper ejection block and the upper end of the spring seat and is fixedly connected with the upper end of the upper ejection block, the lower end of the spring seat is fixedly connected with the upper end of the upper ejection block, the spring seat is C-shaped, the lower end of the upper ejection block is fixedly connected with the bottom plate of the second shell, the upper end of the spring seat is fixedly connected with the upper end of the lower ejection block, the lower end of the upper ejection block is fixedly connected with the lower end of the upper ejection block, the upper end of the lower ejection block is fixedly connected with the lower end of the lower ejection block, and the upper end of the upper ejection block is fixedly connected with the lower end of the lower ejection block.

7. The solder conveying device according to claim 6, wherein the third mechanism further includes a hinge base, a motor frame, and a third power source for driving the motor frame to swing up and down on the hinge base, the hinge base is fixed to the first housing, the motor frame is hinged to the hinge base through a hinge shaft in a front-back direction, the motor frame has a vertical positioning pin, the first lower motor is fixed to the motor frame, the third power source is fixed to a bottom plate of the first housing and connected to the motor frame, and a top plate of the first housing has a positioning hole for positioning the positioning pin.

8. The solder conveying device according to claim 7, wherein a front and rear insertion type socket is formed on an upper surface of the top plate of the first housing, an insertion groove adapted to the socket is formed on a lower surface of the bottom plate of the second housing, the locking mechanism includes a locking head, a fourth power source for driving the locking head to move up and down, and a locking hole corresponding to the locking head, the locking head is located on an upper side of the top plate of the first housing, a vertical cross section of the locking head is inverted trapezoidal, a rod portion downwardly penetrating through the top plate of the first housing is formed at a lower end of the locking head, the fourth power source is fixed to the bottom plate of the first housing and connected to the rod portion, the locking hole is formed on the bottom plate of the second housing, a shape of the locking head is adapted to the locking head, and a notch extending from a front end of the bottom plate to the locking hole and allowing the rod portion to pass through in the front and rear directions is formed on the bottom plate of the second housing.