Powder control device and flux-cored wire powder coiling machine

Abstract

The utility model discloses a powder control device and a flux-cored wire powder coiling machine. The powder control device comprises a powder control seat, and the powder control seat is provided with a powder control ratchet wheel used for trowelling and compacting brazing flux powder contained in a U-shaped welding strip; the powder control ratchet wheel comprises a ratchet wheel body and pawls evenly distributed on the outer side of the ratchet wheel body in the circumferential direction, each pawl comprises a plane and an arc face, and chamfers are arranged on the edges of the two sides of each arc face. The powder control ratchet wheel is adjustable in height and can rotate around the axis of the powder control ratchet wheel. When the powder control ratchet wheel rotates, the rotation direction of the lowest point of the powder control ratchet wheel is opposite to the advancing direction of the U-shaped welding strip, and the plane of a pawl at the lowest position of the powder control ratchet wheel faces the conveyed U-shaped welding strip and brazing flux powder contained in the U-shaped welding strip and can prevent redundant brazing flux powder from being unloaded. The flux-cored wire powder coiling machine comprises a belt releasing mechanism, a U-shaped roller seat, a powder hopper, the powder control device, a wire coiling forming die seat and a coiling mechanism which are arranged in sequence.

Description

Technical Field

[0001] The utility model relates to the technical field of flux-cored welding wire forming, in particular to a powder control device and a flux-cored welding wire powder coiling machine comprising the powder control device. Background Art

[0002] There are many manufacturing processes for flux-cored welding wire. In the 21st century, the high-end flux-cored welding wires on the market were all made by Japan and developed countries in Europe and America. There are few professional equipment for producing flux-cored welding wires in China.

[0003] The most difficult thing to control in the manufacturing process of flux-cored welding wire is the flux powder content in the flux core. Since the flux powder has a low density and is relatively loosely stacked, it is easy to "bridge" and produce pores in the flux-cored welding wire, resulting in poor welding wire quality. A device that can stably control the flux powder content and compact the flux powder in the flux core is needed to solve this problem.

[0004] The patent specification with the announcement number CN201645063U discloses a thin-diameter flux-cored welding wire manufacturing equipment, which solves the problem of accurate quantitative powder addition. The manufacturing equipment is composed of a roller device, a set of powder adding mechanism, a joint roller device, a wire drawing reel device and a PLC programmable controller, wherein the powder adding mechanism includes a powder storage barrel, a powder adding hopper is provided below the powder storage barrel, and a quantitative powder feeding belt is provided below the powder adding hopper; the quantitative powder feeding belt is driven by a motor, and the PLC programmable controller accurately controls the speed of the motor through a frequency converter. With the above structure, the PLC programmable controller accurately controls the speed of the motor through the frequency converter, so that the speed of the powder feeding belt is accurately controlled, thereby further controlling the amount of powder added to ensure that the powder adding rate of the flux-cored welding wire is stable and accurate. The thin-diameter flux-cored welding wire manufacturing equipment of this patented technology cannot compact and smooth the flux powder, which easily causes gaps in the flux-cored welding wire, reducing the quality of the welding wire.

[0005] The patent specification with the publication number CN101837527A discloses an automatic powder adding device and automatic control method for flux-cored welding wire, which includes primary powder adding, secondary powder adding, adjustable center distance and self-compensation tensioning of the powder feeding belt, and dust removal steps; the automatic powder adding device changes the powder adding part from a primary uncontrollable powder adding mechanism to a secondary automatic powder adding mechanism. The powder feeding is a belt conveying mechanism with adjustable center distance and self-compensation tensioning of the belt, and the powder adding device is an overall fully enclosed dust removal and collection structure. The powder adding mechanism in the automatic powder adding device for flux-cored welding wire of the patented technology is relatively complicated, and it is also unable to compact and smooth the flux powder. Utility Model Content

[0006] The utility model provides a powder control device and a flux-cored welding wire powder coiling machine including the powder control device. The utility model has a compact structure, is small and exquisite, simple and practical, easy to operate and can ensure product quality. The wire coiling process involved in the utility model is to roll the welding strip into a U-shaped shape on the machine, add flux powder, smooth and compact the flux powder and remove excess flux powder (excess flux powder can be recycled), and then die roll and close it into an O-shaped tubular flux-cored welding wire or a flux-cored welding wire containing a center welding wire inside.

[0007] A powder control device comprises a powder control seat, on which a powder control ratchet wheel is arranged for leveling and compacting the flux powder contained in the U-shaped welding strip;

[0008] The powder control ratchet comprises a ratchet body and pawls uniformly distributed on the outside of the ratchet body in the circumferential direction, each pawl comprises a flat surface and an arc surface, and chamfers are arranged on both sides of the arc surface;

[0009] The powder control ratchet wheel is height-adjustable and can rotate around its own axis; when the powder control ratchet wheel rotates, the rotation direction of the lowest point of the powder control ratchet wheel is opposite to the advancing direction of the U-shaped welding strip, and the plane of the pawl at the lowest point of the powder control ratchet wheel faces the conveyed U-shaped welding strip and the solder powder contained therein, and can prevent the unloading of excess solder powder.

[0010] In one embodiment, a rotation mechanism is provided on the powder control seat, and the powder control ratchet is eccentrically provided on the rotation mechanism. When the rotation mechanism rotates, the upper and lower height positions of the powder control ratchet change accordingly.

[0011] In one embodiment, the powder control device further includes a first pressing wheel and a first supporting wheel which are arranged correspondingly;

[0012] A gap is left between the first pressure wheel and the first supporting wheel for the U-shaped welding belt containing flux powder to pass through. The first pressure wheel and the first supporting wheel can rotate accordingly in coordination with the forward movement of the U-shaped welding belt containing flux powder, which is beneficial to assisting the U-shaped welding belt to move forward at a uniform speed.

[0013] Furthermore, the first pressing wheel can be connected to the powder control seat via a first connecting arm, and the first connecting arm can rotate around the connecting point with the powder control seat, thereby adjusting the vertical height position of the first pressing wheel connected thereto;

[0014] The first supporting wheel can be connected to the powder control seat via the second connecting arm, and the second connecting arm can rotate with the connecting point between the second connecting arm and the powder control seat as the axis, thereby adjusting the up and down height position of the first supporting wheel connected thereto.

[0015] The utility model also provides a flux-cored welding wire powder coiling machine, comprising a tape unwinding mechanism, a U-shaped roller seat, a powder hopper, the powder control device, a wire coiling forming die seat and a coiling mechanism which are arranged in sequence;

[0016] The unwinding mechanism is used to unwind the flat welding tape;

[0017] The U-shaped roller stand is used to roll the flat welding strip into a U-shaped welding strip in one step or in steps;

[0018] The powder hopper is used to add flux powder into the U-shaped groove of the U-shaped welding strip;

[0019] The wire coiling die is used to coil the U-shaped welding strip containing brazing flux powder into flux-cored welding wire;

[0020] The winding mechanism is used for winding the flux-cored welding wire.

[0021] The flux-cored welding wire powder coiling machine may further include a first auxiliary powder controlling device disposed between the powder controlling device and the wire coiling forming die base.

[0022] In one embodiment, the first auxiliary powder control device includes a first auxiliary powder control seat and a second pressure wheel, a second support wheel and a pressure rod which are sequentially arranged along the advancing direction of the U-shaped welding ribbon containing the flux powder.

[0023] In one embodiment, the second pressure wheel and the second support wheel are correspondingly arranged, and a gap is left between them for the U-shaped welding strip containing flux powder to pass through. The second pressure wheel and the second support wheel can rotate accordingly in coordination with the forward movement of the U-shaped welding strip containing flux powder, which is beneficial to assisting the U-shaped welding strip to move forward at a uniform speed better.

[0024] The second pressing wheel can be connected to the first auxiliary powder control seat via a third connecting arm. The third connecting arm can rotate around the connection point between the third connecting arm and the first auxiliary powder control seat, thereby adjusting the vertical height position of the second pressing wheel connected thereto.

[0025] In one embodiment, the second supporting wheel is adjustably fixedly connected to the first auxiliary powder controlling seat.

[0026] In one embodiment, one end of the pressure rod is fixedly connected to the first auxiliary powder control seat, and the other end is a movable end for compacting the flux powder contained in the U-shaped welding strip. The pressure rod can rotate around the connection point between the pressure rod and the first auxiliary powder control seat, thereby adjusting the vertical height position of the movable end.

[0027] In one embodiment, the flux-cored welding wire powder coiling machine further includes a second auxiliary powder control device disposed between the first auxiliary powder control device and the wire coiling forming die base.

[0028] In one embodiment, the second auxiliary powder control device includes a second auxiliary powder control seat and a corresponding third pressing wheel and a third supporting wheel.

[0029] In one embodiment, a gap is left between the third pressure wheel and the third support wheel for a U-shaped welding strip containing flux powder to pass through. The third pressure wheel and the third support wheel can rotate accordingly in coordination with the forward movement of the U-shaped welding strip containing flux powder, which is beneficial to assisting the U-shaped welding strip to move forward at a uniform speed.

[0030] The third pressing wheel can be connected to the second auxiliary powder control seat via a fourth connecting arm. The fourth connecting arm can rotate around the connecting point between the third pressing wheel and the second auxiliary powder control seat, thereby adjusting the vertical height position of the third pressing wheel connected thereto.

[0031] In one embodiment, the third supporting wheel is adjustably fixedly connected to the second auxiliary powder controlling seat.

[0032] In one embodiment, the flux-cored wire powder coiling machine further includes a trough for collecting dropped flux powder. Furthermore, the powder hopper, the powder control device, the first auxiliary powder control device (if any) and the second auxiliary powder control device (if any) can be located above the trough, and the trough can receive the flux powder dropped by the powder hopper, the powder control device, the first auxiliary powder control device (if any) and the second auxiliary powder control device (if any), and the flux powder can be collected and added back to the powder hopper for reuse.

[0033] In one embodiment, the U-shaped roller stand includes one or more groups of upper and lower corresponding cams and concave wheels; the height of the cams is adjustable.

[0034] In one embodiment, the cam is arranged in a cam seat, and a handle is arranged on the cam seat for adjusting the height of the cam seat and thus adjusting the distance and tightness between the cam and the concave wheel.

[0035] In one embodiment, the winding mechanism includes a motor, a reducer and a winding drum connected in sequence. The winding drum can rotate and wind up the flux-cored welding wire output by the wire winding forming die seat under the drive of the motor.

[0036] In one embodiment, the flux-cored welding wire powder coiling machine further includes a belt-raising wheel seat disposed between the belt-releasing mechanism and the U-shaped roller seat.

[0037] In one embodiment, the flux-cored welding wire powder coiling machine further includes a fourth supporting wheel disposed at the rear end of the wire coiling forming die base, which can stabilize the flux-cored welding wire output by the wire coiling forming die base.

[0038] In one embodiment, the flux-cored wire powder coiling machine also includes a wire unwinding mechanism for unwinding a center welding wire. The center welding wire unwinded by the wire unwinding mechanism is inserted into a U-shaped groove of a U-shaped welding strip containing flux powder at the front end of a wire coiling forming die base, and the flux-cored welding wire output from the rear end of the wire coiling forming die base contains the center welding wire.

[0039] Compared with the prior art, the utility model has the following beneficial effects:

[0040] The powder control device of the utility model and the flux-cored welding wire powder coiling machine including the powder control device are inexpensive, simple in structure, easy to manufacture, reliable in control, novel and practical, can efficiently smooth and compact the flux powder contained in the U-shaped welding strip and remove excess flux powder, and can adjust the amount of smoothed and compacted flux powder in the U-shaped welding strip, and excess flux powder can be recycled. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 This is a schematic diagram of the main structure of the powder control device of Example 1;

[0042] Figure 2 It is a schematic diagram of the side structure of the powder control device of Example 1 (the first pressing wheel and the first connecting arm are omitted);

[0043] Figure 3 Schematic diagram of the structure of the powder control ratchet in the powder control device of Example 1;

[0044] Figure 4 It is a structural schematic diagram of a flux-cored welding wire powder coiling machine of Example 3;

[0045] Figure 5 It is a schematic structural diagram of a U-shaped roller seat in a flux-cored welding wire powder coiling machine of Example 3;

[0046] Figure 6 It is a structural schematic diagram of the first auxiliary powder control device in the flux-cored welding wire powder coiling machine of Example 3;

[0047] Figure 7 Schematic diagram of the structure of the second auxiliary powder control device in the flux-cored welding wire powder coiling machine of Example 3;

[0048] Figure 8 This is a schematic structural diagram of a flux-cored welding wire powder coiling machine of Example 4. DETAILED DESCRIPTION

[0049] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention.

[0050] Example 1

[0051] See also Figure 1 , Figure 2 The powder control device of this embodiment includes a powder control seat 101 and a first pressing wheel 106 and a first supporting wheel 105 which are arranged correspondingly. A self-rotating mechanism 104 is arranged on the powder control seat 101, and the self-rotating mechanism 104 can be a self-rotating disc. A powder control ratchet 103 is eccentrically arranged on the self-rotating mechanism 104. The powder control ratchet 103 is used to smooth and compact the flux powder 108 contained in the U-shaped welding strip 17.

[0052] See also Figure 1 to Figure 3The powder control ratchet 103 includes a ratchet body 30 and eight ratchet claws 31 evenly distributed on the outside of the ratchet body 30 in the circumferential direction. Each ratchet claw 31 includes a plane 32 and an arc surface 33. The edges of the arc surface 33 are chamfered on both sides. The powder control ratchet 103 can rotate around its own axis. When the powder control ratchet 103 rotates, the rotation direction of the lowest point of the powder control ratchet 103 is opposite to the forward direction of the U-shaped welding strip 17, and the plane 32 of the ratchet claw 31 at the lowest point of the powder control ratchet 103 faces the U-shaped welding strip 17 and the flux powder contained therein, and can prevent the unloading of excess flux powder, while the arc surface 33 on the back can smooth and compact the flux powder contained in the U-shaped welding strip 17, and due to the arc design of the arc surface 33 itself and the chamfer design on both sides, on the one hand, it can match the U-shaped groove of the U-shaped welding strip 17, and on the other hand, it can reduce the powder sticking to the surface of the ratchet claw 31. For example, Figure 1 As shown, when the U-shaped welding belt 17 containing the flux powder moves from right to left, the powder control ratchet wheel 103 rotates counterclockwise.

[0053] See also Figure 1 When the rotating mechanism 104 rotates, the upper and lower height positions of the powder controlling ratchet wheel 103 change accordingly. Figure 1 FIG. 1 shows a trajectory 102 of the powder control ratchet 103 revolving around the center of the rotation mechanism 104. Figure 1 In the shown state, when the rotating mechanism 104 rotates clockwise, the height position of the powder control ratchet 103 decreases accordingly, and the pawl 31 penetrates into the U-shaped groove of the U-shaped welding strip 17. The amount of flux powder blocked by the plane 32 for unloading will increase, and the residual flux powder leveled and compacted in the U-shaped welding strip 17 will decrease. When the rotating mechanism 104 rotates counterclockwise, the height position of the powder control ratchet 103 increases accordingly, and the amount of flux powder blocked by the plane 32 for unloading will decrease, and the residual flux powder leveled and compacted in the U-shaped welding strip 17 will increase. In this way, the amount of flux powder finally contained in the U-shaped welding strip 17 can be adjusted.

[0054] See also Figure 1 , Figure 2 The self-rotating mechanism 104 and the powder control ratchet 103 thereon are located at the front end of the first pressing wheel 106 and the first supporting wheel 105. A gap is left between the first pressing wheel 106 and the first supporting wheel 105 for the U-shaped welding belt 17 containing the flux powder to pass through. The first pressing wheel 106 and the first supporting wheel 105 can rotate accordingly in coordination with the forward movement of the U-shaped welding belt 17 containing the flux powder. For example, Figure 1 As shown, when the U-shaped welding belt 17 containing the flux powder moves from right to left, the first pressing wheel 106 rotates clockwise, and the first supporting wheel 105 rotates counterclockwise.

[0055] See also Figure 1The first pressing wheel 106 is connected to the powder control seat 101 through the first connecting arm 108. The first connecting arm 108 can rotate with the connection point between the first pressing wheel 106 and the powder control seat 101 as the axis, thereby adjusting the vertical height position of the first pressing wheel 106 connected thereto to match the thickness of the flux powder after being smoothed and compacted by the powder control ratchet 103. The first supporting wheel 105 is connected to the powder control seat 101 through the second connecting arm 107. The second connecting arm 107 can rotate with the connection point between the first pressing wheel 106 and the powder control seat 101 as the axis, thereby adjusting the vertical height position of the first supporting wheel 105 connected thereto to ensure the straightness of the U-shaped welding strip 17.

[0056] The first pressing wheel 106 cooperates with the first supporting wheel 105 , which can support the U-shaped welding strip 17 to ensure the straightness of the U-shaped welding strip 17 , and further smooth and compact the flux powder contained in the U-shaped welding strip 17 .

[0057] Example 2

[0058] Compared with Example 1, the powder controlling device of this embodiment is the same as that of Example 1 except that the first pressing wheel 106 , the first supporting wheel 105 , the first connecting arm 108 , and the second connecting arm 107 are missing.

[0059] Example 3

[0060] See also Figure 4 The flux-cored welding wire powder coiling machine of this embodiment includes a material trough 16 and a tape unwinding mechanism 1, a tape wake-up pulley seat 3, a U-shaped roller seat 4, a powder hopper 5, a powder control device 6, a first auxiliary powder control device 7, a second auxiliary powder control device 8, a wire coiling die seat 9 and a winding mechanism which are arranged in sequence.

[0061] The unwinding mechanism 1 is used for unwinding the flat welding tape 2, and may be a unwinding reel.

[0062] The pulley seat 3 may specifically include four H-shaped groove wheels, so that the welding strip is warmed up and physically deformed through movement.

[0063] The U-shaped rolling roller seat 4 is used to roll the flat welding strip 2 into a U-shaped welding strip 17 in one step. Figure 5 The U-shaped roller seat 4 includes a set of cams 402 and concave wheels 403 corresponding to each other. The height of the cam 402 is adjustable. Specifically, the cam 402 is arranged in the cam seat, and the cam seat is provided with a handle 401 which can adjust the height of the cam seat and thus adjust the spacing and tightness of the cam 402 and the concave wheel 403. Of course, according to actual conditions, the U-shaped roller seat 4 can also include multiple sets of cams 402 and concave wheels 403 corresponding to each other. The specific structure and connection relationship of the cams 402 and the concave wheels 403 can refer to the above description. Under such a design, the U-shaped roller seat 4 can roll the flat welding strip 2 into the U-shaped welding strip 17 step by step.

[0064] The powder hopper 5 is used to feed and add flux powder into the U-shaped groove of the U-shaped welding strip 17 .

[0065] The powder control device 6 is used to smooth and compact the flux powder contained in the U-shaped welding strip 17 and prevent the excess flux powder from being discharged. Specifically, the powder control device of Embodiment 1 or Embodiment 2 may be used.

[0066] The first auxiliary powder control device 7 and the second auxiliary powder control device 8 are used to further smooth and compact the flux powder contained in the U-shaped welding strip 17 , and at the same time support the U-shaped welding strip 17 to ensure the straightness of the U-shaped welding strip 17 .

[0067] See also Figure 6 The first auxiliary powder control device 7 includes a first auxiliary powder control seat 202 and a second pressure wheel 201, a second support wheel 203 and a pressure rod 204 which are sequentially arranged along the forward direction of the U-shaped welding belt 17 containing the flux powder. The second pressure wheel 201 and the second support wheel 203 are arranged correspondingly, and have a similar working principle and function to the first pressure wheel 106 and the first support wheel 105 in the powder control device of Example 1. Specifically, a gap is left between the second pressure wheel 201 and the second support wheel 203 for the U-shaped welding belt 17 containing the flux powder to pass through, and the second pressure wheel 201 and the second support wheel 203 can rotate accordingly in coordination with the forward movement of the U-shaped welding belt 17 containing the flux powder. For example, as Figure 6 As shown, when the U-shaped welding belt 17 containing the flux powder moves from right to left, the second pressing wheel 201 rotates clockwise, and the second supporting wheel 203 rotates counterclockwise.

[0068] See also Figure 6 , the second pressing wheel 201 is connected to the first auxiliary powder control seat 202 through the third connecting arm 205, and the third connecting arm 205 can rotate with the connection point between it and the first auxiliary powder control seat 202 as the axis, thereby adjusting the upper and lower height positions of the second pressing wheel 201 connected thereto to match the thickness of the flux powder after being smoothed and compacted by the powder control device 6. The second supporting wheel 203 is adjustably fixedly connected to the first auxiliary powder control seat 202 to ensure the straightness of the U-shaped welding strip 17. One end of the pressing rod 204 is fixedly connected to the first auxiliary powder control seat 202, and the other end is a movable end, which is used to further compact the flux powder contained in the U-shaped welding strip 17. The pressing rod 204 can rotate with the connection point between it and the first auxiliary powder control seat 202 as the axis, thereby adjusting the upper and lower height positions of the movable end to match the thickness of the flux powder after being smoothed and compacted by the second pressing wheel 201.

[0069] See also Figure 7The second auxiliary powder control device 8 includes a second auxiliary powder control seat 302 and a corresponding third pressure wheel 301 and a third support wheel 303. The third pressure wheel 301 and the third support wheel 303 also have similar working principles and functions as the first pressure wheel 106 and the first support wheel 105 in the powder control device of Example 1. Specifically, a gap is left between the third pressure wheel 301 and the third support wheel 303 for the U-shaped welding belt 17 containing the flux powder to pass through, and the third pressure wheel 301 and the third support wheel 303 can rotate accordingly in coordination with the forward movement of the U-shaped welding belt 17 containing the flux powder. For example, as Figure 7 As shown, when the U-shaped welding belt 17 containing the flux powder moves from right to left, the third pressing wheel 301 rotates clockwise, and the third supporting wheel 303 rotates counterclockwise.

[0070] See also Figure 7 The third pressing wheel 301 is connected to the second auxiliary powder control seat 302 through the fourth connecting arm 304. The fourth connecting arm 304 can rotate with the connection point between the third pressing wheel 301 and the second auxiliary powder control seat 302 as the axis, thereby adjusting the upper and lower height positions of the third pressing wheel 301 connected thereto to match the thickness of the flux powder after being smoothed and compacted by the first auxiliary powder control device 7. The third supporting wheel 303 is adjustably fixedly connected to the second auxiliary powder control seat 302 to ensure the straightness of the U-shaped welding strip 17.

[0071] The material trough 16 is used to collect the fallen flux powder, and the powder hopper 5, the powder control device 6, the first auxiliary powder control device 7 and the second auxiliary powder control device 8 are all located above the material trough 16. The flux powder dropped by the powder hopper 5, the powder control device 6, the first auxiliary powder control device 7 and the second auxiliary powder control device 8 can be collected by the material trough 16 and re-added to the hopper 5 for reuse.

[0072] The wire coiling die base 9 is used to coil the U-shaped welding strip 17 containing the brazing flux powder into a flux-cored welding wire. A fourth support wheel 10 is provided at the rear end of the wire coiling die base 9 to stabilize the flux-cored welding wire output by the wire coiling die base.

[0073] The coiling mechanism is used to coil the flux-cored wire. Figure 4 The winding mechanism includes a motor 15, a reducer 14 and a winding drum 11 which are connected in sequence. The winding drum 11 can rotate and wind up the flux-cored welding wire output by the wire winding forming die base 9 under the drive of the motor 15.

[0074] Example 4

[0075] See also Figure 8The flux-cored welding wire powder coiling machine of this embodiment, based on the embodiment 3, further includes a welding wire unwinding mechanism 12 for unwinding a center welding wire 13. The center welding wire 13 unwound by the welding wire unwinding mechanism 12 is inserted into the U-shaped groove of the U-shaped welding strip 17 containing the flux powder at the front end of the wire coiling forming die base 9. The flux-cored welding wire outputted from the rear end of the wire coiling forming die base 9 contains the center welding wire 13.

[0076] In addition, it should be understood that after reading the above description of the present invention, those skilled in the art may make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the claims attached to this application.

Claims

1. A powder control device, characterized in that: It comprises a powder control seat (101), on which a powder control ratchet (103) for smoothing and compacting the brazing flux powder contained in the U-shaped welding strip (17) is arranged; The powder control ratchet (103) comprises a ratchet body (30) and ratchet claws (31) uniformly distributed on the outside of the ratchet body (30) in the circumferential direction, each ratchet claw (31) comprises a plane (32) and an arc surface (33), and chamfers are provided on both side edges of the arc surface (33); The powder control ratchet (103) is height-adjustable and can rotate around its own axis. When the powder control ratchet (103) rotates, the rotation direction of the lowest point of the powder control ratchet (103) is opposite to the advancing direction of the U-shaped welding strip (17), and the plane (32) of the pawl (31) at the lowest point of the powder control ratchet (103) faces the U-shaped welding strip (17) and the solder powder contained therein, and can prevent the discharge of excess solder powder.

2. The powder control device according to claim 1, characterized in that: A rotation mechanism (104) is arranged on the powder control seat (101), and the powder control ratchet (103) is eccentrically arranged on the rotation mechanism (104). When the rotation mechanism (104) rotates, the upper and lower height positions of the powder control ratchet (103) change accordingly.

3. The powder control device according to claim 1, characterized in that: The powder control device further comprises a first pressing wheel (106) and a first supporting wheel (105) which are arranged correspondingly; A gap is left between the first pressing wheel (106) and the first supporting wheel (105) for the U-shaped welding belt (17) containing the solder powder to pass through, and the first pressing wheel (106) and the first supporting wheel (105) can rotate accordingly in coordination with the forward movement of the U-shaped welding belt (17) containing the solder powder.

4. The powder control device according to claim 3, characterized in that: The first pressing wheel (106) is connected to the powder control seat (101) via a first connecting arm (108); the first connecting arm (108) can rotate around the connection point between the first pressing wheel (106) and the powder control seat (101) to thereby adjust the vertical height position of the first pressing wheel (106) connected thereto; The first supporting wheel (105) is connected to the powder control seat (101) via the second connecting arm (107). The second connecting arm (107) can rotate around the connection point between the second connecting arm and the powder control seat (101) to thereby adjust the vertical height position of the first supporting wheel (105) connected thereto.

5. A flux-cored welding wire powder coiling machine, characterized in that: It comprises a tape unwinding mechanism (1), a U-shaped roller seat (4), a powder hopper (5), a powder control device (6) as claimed in any one of claims 1 to 4, a wire winding die seat (9) and a winding mechanism which are arranged in sequence; The unwinding mechanism (1) is used for unwinding the flat welding tape (2); The U-shaped rolling roller seat (4) is used to roll the flat welding strip (2) into a U-shaped welding strip (17) in one step or in multiple steps; The powder hopper (5) is used to feed and add flux powder into the U-shaped groove of the U-shaped welding strip (17); The wire coiling die base (9) is used to coil a U-shaped welding strip (17) containing brazing flux powder into a flux-cored welding wire; The winding mechanism is used for winding the flux-cored welding wire.

6. The flux-cored welding wire powder coiling machine according to claim 5, characterized in that: The flux-cored welding wire powder coiling machine further comprises a first auxiliary powder control device (7) arranged between the powder control device (6) and the wire coiling forming die base (9); The first auxiliary powder control device (7) comprises a first auxiliary powder control seat (202), and a second pressing wheel (201), a second supporting wheel (203) and a pressing rod (204) which are sequentially arranged along the advancing direction of the U-shaped welding strip (17) containing the solder powder; The second pressing wheel (201) and the second supporting wheel (203) are arranged correspondingly, and a gap is left between them for the U-shaped welding belt (17) containing the solder powder to pass through. The second pressing wheel (201) and the second supporting wheel (203) can rotate accordingly in coordination with the forward movement of the U-shaped welding belt (17) containing the solder powder. The second pressing wheel (201) is connected to the first auxiliary powder control seat (202) via a third connecting arm (205), and the third connecting arm (205) can rotate around the connection point between the third connecting arm and the first auxiliary powder control seat (202), thereby adjusting the vertical height position of the second pressing wheel (201) connected thereto; The second supporting wheel (203) is adjustably fixedly connected to the first auxiliary powder control seat (202); One end of the pressure rod (204) is fixedly connected to the first auxiliary powder control seat (202), and the other end is a movable end for compacting the flux powder contained in the U-shaped welding strip (17); the pressure rod (204) can rotate around the connection point between it and the first auxiliary powder control seat (202) as the axis, thereby adjusting the upper and lower height positions of the movable end.

7. The flux-cored welding wire powder coiling machine according to claim 6, characterized in that: The flux-cored welding wire powder coiling machine further comprises a second auxiliary powder control device (8) arranged between the first auxiliary powder control device (7) and the wire coiling forming die base (9); The second auxiliary powder control device (8) comprises a second auxiliary powder control seat (302) and a correspondingly arranged third pressing wheel (301) and a third supporting wheel (303); A gap is left between the third pressing wheel (301) and the third supporting wheel (303) for the U-shaped welding belt (17) containing the solder powder to pass through, and the third pressing wheel (301) and the third supporting wheel (303) can rotate accordingly with the forward movement of the U-shaped welding belt (17) containing the solder powder; The third pressing wheel (301) is connected to the second auxiliary powder control seat (302) via a fourth connecting arm (304), and the fourth connecting arm (304) can rotate around the connection point between the third pressing wheel (301) and the second auxiliary powder control seat (302), thereby adjusting the vertical height position of the third pressing wheel (301) connected thereto; The third supporting wheel (303) is adjustably fixedly connected to the second auxiliary powder controlling seat (302).

8. The flux-cored welding wire powder coiling machine according to claim 7, characterized in that: The flux-cored welding wire powder coiling machine further comprises a material trough (16) for collecting fallen flux powder, and the powder hopper (5), the powder control device (6), the first auxiliary powder control device (7) and the second auxiliary powder control device (8) are all located above the material trough (16).

9. The flux-cored welding wire powder coiling machine according to claim 5, characterized in that: The U-shaped roller seat (4) comprises one or more groups of upper and lower corresponding cams (402) and concave wheels (403); the height of the cam (402) is adjustable; the cam (402) is arranged in the cam seat, and the cam seat is provided with a handle (401) which can adjust the height of the cam seat and thus adjust the distance and tightness between the cam (402) and the concave wheel (403); The winding mechanism comprises a motor (15), a reducer (14) and a winding drum (11) which are connected in sequence. The winding drum (11) can rotate and wind up the flux-cored welding wire output from the wire winding forming die base (9) under the drive of the motor (15).

10. The flux-cored welding wire powder coiling machine according to any one of claims 5 to 9, characterized in that: The flux-cored wire powder coiling machine also includes: A belt-raising wheel seat (3) disposed between the belt-releasing mechanism (1) and the U-shaped roller seat (4); A fourth supporting wheel (10) arranged at the rear end of the wire winding forming die base (9); A welding wire unwinding mechanism (12) is used for unwinding a central welding wire (13). The central welding wire (13) unwinded by the welding wire unwinding mechanism (12) is inserted into a U-shaped groove of a U-shaped welding strip (17) containing brazing flux powder at the front end of a wire coiling die base (9). The flux-cored welding wire outputted from the rear end of the wire coiling die base (9) contains the central welding wire (13).

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