Wire feeding and wire returning independent control type laser welding machine
The laser welding machine with independent control of wire feeding and return utilizes a linear reciprocating drive mechanism to achieve efficient wire return, solving the problem of reduced clamping force caused by wire deformation and improving wire return efficiency and ease of operation.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- QUICK INTELLIGENT EQUIP CO LTD
- Filing Date
- 2025-08-21
- Publication Date
- 2026-07-28
AI Technical Summary
In existing laser welding machines, the welding wire undergoes cross-sectional deformation under the strong clamping force of the driving and driven wheels, which leads to a decrease or even failure of the clamping force during wire rewinding, resulting in wire rewinding failure or extremely low efficiency.
The system employs independent control of wire feeding and return, utilizing a drive wheel and a driven wheel to feed the wire, and a linear reciprocating drive mechanism to drive the wire feeding assembly back to avoid slippage. A direct-drive lifting mode is used for wire return.
It achieves efficient separation control of yarn feeding and yarn return, avoids slippage between the drive wheel and the driven wheel during yarn return, and improves yarn return efficiency and ease of operation.
Smart Images
Figure CN224560287U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of laser welding technology, and in particular to a laser welding machine with independent control of wire feeding and return. Background Technology
[0002] In laser welding, precise and stable wire feeding is crucial for achieving high-quality welding. Currently, most mainstream laser welding machines employ a wire feeding mechanism that uses a drive wheel and a driven wheel to clamp the welding wire. The basic working principle is as follows: the drive wheel rotates forward under the drive of a device (such as a motor), and through the clamping force applied by the drive wheel and the driven wheel, it drives the welding wire forward to overcome resistance, thus achieving the wire feeding function. When it is necessary to retract the welding wire (e.g., to adjust its position or pause welding), the drive wheel is driven to rotate in reverse, aiming to use the same clamping force to move the welding wire backward, thus achieving the wire return function.
[0003] However, when the welding wire (especially thinner or softer wire) is fed forward under the strong clamping force of the drive and driven wheels, its cross-section inevitably undergoes plastic deformation, such as being flattened into an ellipse (i.e., the "flat wire effect"). However, when the wire rewind operation is required, the drive wheel reverses. At this point, the cross-sectional deformation of the welding wire caused by the wire feeding process (such as ellipticization) can no longer form an effective and tight meshing and frictional force transmission with the grooves of the wire feeding wheels (drive and driven wheels). The contact area and contact state between the deformed welding wire and the grooves change significantly, leading to a substantial decrease or even failure of the clamping force. The direct consequence is that when the drive wheel reverses, the welding wire cannot be effectively clamped and pulled back, resulting in severe relative slippage (slippage) between the drive wheel and the deformed welding wire, causing the drive wheel to spin freely, leading to failure or extremely low efficiency in the wire rewind operation. Utility Model Content
[0004] The technical problem to be solved by this utility model is: In order to solve the problem that when the laser welding machine uses a drive wheel and a driven wheel to feed the wire, the cross section of the welding wire will inevitably deform under the strong clamping force of the drive wheel and the driven wheel. As a result, when the wire retraction operation is required, the cross section deformation of the welding wire caused by the wire feeding process leads to a significant decrease or even failure of the clamping force. The welding wire cannot be effectively clamped and driven to retract, resulting in failure of the wire retraction operation or extremely low efficiency. The present invention provides a laser welding machine with independent control of wire feeding and wire retraction.
[0005] The technical solution adopted by this utility model to solve its technical problem is: a laser welding machine with independent control of wire feeding and return, comprising: The wire feeding assembly includes a wire feeding seat, a drive wheel mounted on the wire feeding seat, a rotary drive mechanism for driving the drive wheel to rotate, and a driven wheel for cooperating with the drive wheel. The drive wheel and the driven wheel clamp the welding wire between them and drive the welding wire to move forward by rotating the drive wheel. The wire outlet nozzle is disposed on the wire feeder and is used to receive the welding wire from the wire feeder assembly and output the welding wire. The wire return assembly includes a linear reciprocating drive mechanism, the output of which is connected to the wire feeder to drive the wire feed assembly and the welding wire it holds to retract.
[0006] Furthermore, the rotary drive mechanism includes a motor, a driving bevel gear connected to the output end of the motor, and a driven bevel gear meshing with the driving bevel gear and fixed to the driving wheel.
[0007] Furthermore, an adapter is connected between the linear reciprocating drive mechanism and the wire feeder, and the rotary drive mechanism is mounted on the adapter.
[0008] Furthermore, the wire feeding assembly also includes a mounting base for mounting a linear reciprocating drive mechanism. One side of the mounting base has a guide groove for accommodating part of the motor and guiding the movement of the motor, and the other side is equipped with a slide rail. The wire feeding base is equipped with a slider that cooperates with the slide rail.
[0009] Furthermore, a reset mechanism for resetting the wire feeder is provided between the wire feeder and the mounting base.
[0010] Furthermore, the reset mechanism includes a reset rod fixed to the bottom of the mounting base and passing through the adapter base, and an elastic element sleeved on the reset rod. One end of the elastic element abuts against the limiting portion protruding from the bottom of the reset rod, and the other end abuts against the adapter base.
[0011] Furthermore, it also includes a cover fixed to the mounting base, wherein the wire feeder has grooves recessed on both sides, and the open end of the cover is bent to form a sliding part that slides in cooperation with the grooves.
[0012] Furthermore, an input gap, a clamping area, and an output gap are sequentially formed between the driving wheel and the driven wheel along the wire feeding direction; The wire feeding assembly also includes an input guide for feeding the welding wire to the clamping area and an output guide for feeding the welding wire in the clamping area to the wire exit nozzle. The end of the input guide near the clamping area extends into the input gap, and the end of the output guide near the clamping area extends into the output gap.
[0013] Furthermore, a guide seat with an internally formed guide channel is installed on the upstream side of the input guide nozzle, and a guide wheel for guiding the welding wire into the guide channel is installed inside the guide seat.
[0014] Furthermore, the output guide nozzle includes an outer nozzle and an inner nozzle inserted into the outer nozzle. The inner nozzle has a insertion channel for inserting the wire nozzle, and the inner peripheral wall of the insertion channel has a notch extending to the outer peripheral wall of the inner nozzle. A pressure arm is formed at the notch that can be pressed against the wire nozzle in the insertion channel under external force to fix the wire nozzle.
[0015] The beneficial effects of this utility model are: This utility model uses a driving wheel and a driven wheel to feed the yarn, and uses a linear reciprocating drive mechanism to drive the yarn feeding assembly to retract as a whole to return the yarn. The yarn feeding and return are achieved by two sets of mechanisms, which can avoid the slippage caused by the driving wheel and the driven wheel returning the yarn. In addition, the yarn return adopts a direct drive lifting mode, which is simple and direct to operate and has high efficiency.
[0016] Other features and advantages of this application will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description
[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0018] Figure 1 This is a three-dimensional schematic diagram of the present invention from a first-person perspective; Figure 2 This is a three-dimensional schematic diagram of the present invention from a second perspective; Figure 3 This is the front view of this utility model; Figure 4 This is a three-dimensional schematic diagram of the present invention after the cover has been removed; Figure 5 This is a rear view of the present invention after the cover has been removed; Figure 6 This is a schematic diagram of the rewind assembly in this utility model; Figure 7 Front view of the wire feeding assembly in this utility model; Figure 8 This is a cross-sectional view of the wire feeding assembly in this utility model; In the picture: 1. Wire feeding assembly; 101. Wire feeder; 1011. Slide groove; 102. Driving wheel; 103. Driven wheel; 104. Motor; 105. Driving bevel gear; 106. Driven bevel gear; 107. Slider; 108. Input gap; 109. Clamping area; 110. Output gap; 111. Input guide nozzle; 112. Output guide nozzle; 1121. Outer sleeve nozzle; 1122. Inner sleeve nozzle; 1123. Notch; 1124. Pressure arm; 1125. Flange; 113. Swing arm; 114. Flange; 2. Cable feed nozzle; 3. Rewind assembly; 301. Linear reciprocating drive mechanism; 302. Adapter; 303. Mounting base; 3031. Guide groove; 304. Slide rail; 305. Reset rod; 3051. Limiting part; 306. Elastic element; 4. Cover; 401. Sliding part; 5. Guide seat; 6. Guide wheels; 7. Welding wire. Detailed Implementation
[0019] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention. Therefore, they only show the components, orientations, and references (e.g., up, down, left, right, etc.) relevant to the present invention and are intended only to aid in the description of the features in the drawings. Therefore, the following specific embodiments are not intended to be restrictive, and the scope of the claimed subject matter is defined solely by the appended claims and their equivalents.
[0020] like Figure 1-8 As shown, a wire feeding mechanism with measurable length for feeding welding wire includes a wire feeding assembly 1, a wire outlet nozzle 2, and a wire return assembly 3. The wire feeding assembly 1 includes a wire feeding seat 101, a drive wheel 102 mounted on the wire feeding seat 101, a rotary drive mechanism for driving the drive wheel 102 to rotate, and a driven wheel 103 for cooperating with the drive wheel 102. The drive wheel 102 and the driven wheel 103 clamp the welding wire 7 between them and drive the welding wire 7 to move forward by rotating the drive wheel 102. The installation structure of the driven wheel 103 is not limited to: a rocker arm 113 is hinged on the wire feeder 101, the driven wheel 103 is rotatably mounted on one end of the rocker arm 113, and a pressure element is installed between the other end of the rocker arm 113 and the wire feeder 101 to apply pressure to the rocker arm 113 so that the driven wheel 103 is always pressed against the driving wheel 102. The pressure element can be a spring or a spring plunger, etc. The wire outlet nozzle 2 is disposed on the wire feeder 101 and is used to receive the welding wire 7 from the wire feeder assembly 1 and output the welding wire 7; The wire return assembly 3 includes a linear reciprocating drive mechanism 301, the output end of which is connected to the wire feeder 101 to drive the wire feed assembly 1 and the welding wire 7 it holds to retract. The linear reciprocating drive mechanism 301 can be, but is not limited to, a cylinder or an electric cylinder. When feeding the wire, the rotary drive mechanism starts and drives the drive wheel 102 to rotate. The welding wire 7, which is clamped between the drive wheel 102 and the driven wheel 103, moves forward under the push of the drive wheel 102 and is output through the wire outlet 2. The laser welding head emits a laser beam, which hits the welding wire 7 and melts and welds it. During wire retraction, the linear reciprocating drive mechanism 301 is activated, driving the wire feeder 101 upward. The drive wheel 102, driven wheel 103, the welding wire 7 clamped between them, and the wire outlet 2 move upward synchronously, causing the welding wire 7 to gradually move away from the welding area, thereby retracting the wire. In this embodiment, the drive wheel 102 and driven wheel 103 are used to feed the wire, and the linear reciprocating drive mechanism 301 is used to drive the wire feed assembly 1 to retract as a whole, thereby retracting the wire. Wire feeding and retraction are achieved through two separate mechanisms, which can avoid slippage caused by the drive wheel 102 and driven wheel 103 retracting the wire. Furthermore, the wire retraction adopts a direct-drive lifting mode, which is simple, direct, and highly efficient.
[0021] In some examples, the rotary drive mechanism includes a motor 104, a driving bevel gear 105 connected to the output end of the motor 104, and a driven bevel gear 106 meshing with the driving bevel gear 105 and fixed to the driving wheel 102. A connecting shaft is fixed between the driven bevel gear 106 and the driving wheel 102. The wire feeder 101 has a through hole for the connecting shaft to pass through, and a bearing is installed between the connecting shaft and the through hole.
[0022] When the motor 104 starts, it drives the active bevel gear 105 to rotate. The driven bevel gear 106 moves synchronously, driving the active wheel 102 to rotate. The active wheel 102 and the driven wheel 103 cooperate to push the welding wire 7 forward to achieve wire feeding. The cooperation between the active bevel gear 105 and the driven bevel gear 106 can reduce the thickness of the entire structure.
[0023] In some examples, a transition seat 302 is connected between the linear reciprocating drive mechanism 301 and the wire feeder 101. The rotary drive mechanism is mounted on the transition seat 302. The linear reciprocating drive mechanism 301 drives the wire feeder 101 to rise and fall through the transition seat 302. At the same time, the rotary drive mechanism also moves synchronously to drive the drive wheel 102 to rise and fall.
[0024] In some examples, the rewind assembly 3 further includes a mounting base 303 for mounting the linear reciprocating drive mechanism 301. The mounting base 303 is spaced apart from the wire feeder 101. One side of the mounting base 303 forms a guide groove 3031 for accommodating part of the motor 104 and guiding the movement of the motor 104, and the other side is equipped with a slide rail 304. The wire feeder 101 is equipped with a slider 107 that cooperates with the slide rail 304. When the linear reciprocating drive mechanism 301 drives the adapter 302 to move, the wire feeder 101 mounted on the adapter 302 rises and falls synchronously with the motor 104. The guide groove 3031 can guide the movement of the motor 104. At the same time, the partial entry of the motor 104 into the guide groove 3031 can further reduce the size of the entire device. The cooperation between the slide rail 304 and the slider 107 can provide guidance for the movement of the wire feeder 101, ensuring the linear movement of the wire feeder 101.
[0025] In some examples, a reset mechanism for resetting the wire feeder 101 is provided between the wire feeder 101 and the mounting base 303.
[0026] In some examples, the reset mechanism includes a reset rod 305 fixed to the bottom of the mounting base 303 and passing through the adapter base 302, and an elastic element 306 sleeved on the reset rod 305. The elastic element 306 may be a spring. One end of the elastic element 306 abuts against the limiting part 3051 protruding from the bottom of the reset rod 305, and the other end abuts against the adapter base 302. The adapter base 302 has a through hole for the reset rod 305 to pass through, and the end of the through hole near the limiting part 3051 expands to form a stepped hole structure. The other end of the spring enters the through hole of the adapter base 302 and abuts against the stepped surface inside.
[0027] In some examples, a housing 4 fixed to the mounting base 303 is also included. The housing 4 encloses the rotary drive mechanism and the adapter 302 inside. The wire feeder 101 has recessed grooves 1011 on both sides. The open end of the housing 4 is bent to form a sliding part 401 that slides with the grooves 1011. When the wire feeder 101 rises and falls under the action of the linear reciprocating drive mechanism 301, the sliding part 401 and the grooves 1011 cooperate to guide the movement of the wire feeder 101.
[0028] In some examples, an input gap 108, a clamping area 109, and an output gap 110 are sequentially formed between the driving wheel 102 and the driven wheel 103 along the wire feeding direction; The wire feeding assembly 1 also includes an input guide nozzle 111 for feeding the welding wire 7 to the clamping area 109 and an output guide nozzle 112 for feeding the welding wire 7 from the clamping area 109 to the output nozzle 2. The wire feed base 101 has an upper fixing seat for fixing the input guide nozzle 111 and a lower fixing seat for fixing the output guide nozzle 112. The input guide nozzle 111 extends longitudinally through the upper fixing seat, and a fastener extends laterally into the upper fixing seat and abuts against the input guide nozzle 111 to fix it. The abutting surface of the input guide nozzle 111 is flat. The output guide nozzle 112 has a flange 1125 protruding radially, and the flange 1125 is fixed to the lower fixing seat via a flange 114.
[0029] The input guide nozzle 111 has an input channel for the welding wire 7 to pass through. The input channel includes a large-diameter section, a variable-diameter section, and a small-diameter section connected sequentially along the wire feeding direction. The end of the large-diameter section opposite to the variable-diameter section has a chamfer to guide the welding wire 7 into the channel. The large-diameter section, the variable-diameter section, and the small-diameter section can gradually correct the position of the welding wire 7 so that it can smoothly enter the clamping area 109. The output guide nozzle 112 has an output channel for the welding wire 7 to pass through, and the end of the output channel near the clamping area 109 is flared to allow the welding wire 7 to enter. The end of the input guide nozzle 111 near the clamping area 109 extends into the input gap 108 and has a similar structure to the input gap 108. The end of the output guide nozzle 112 near the clamping area 109 extends into the output gap 110 and has a similar structure to the output gap 110. It is as close as possible to the clamping area 109 as possible to reduce the risk of the welding wire 7 bending, while ensuring that the rotation of the drive wheel 102 is not affected as much as possible.
[0030] In some examples, a guide seat 5 with an internally formed guide channel is installed on the upstream side of the input guide nozzle 111. A guide wheel 6 for guiding the welding wire 7 into the guide channel is installed in the guide seat 5. The guide wheel 6 can guide the welding wire 7 from the welding pad. The guide wheel 6 is sleeved on the pin shaft, which passes through the guide seat 5. One end of the pin shaft protrudes to abut against the guide seat 5, and a retaining ring is installed at the other end. The two are combined to limit the axial movement of the pin shaft. The guide seat 5 is fixed to the base by inserting a protruding insert shaft at the bottom.
[0031] In some examples, the output nozzle 112 includes an outer nozzle 1121 and an inner nozzle 1122 inserted into the outer nozzle 1121. The inner nozzle 1122 has a plug-in channel for inserting the wire outlet nozzle 2. After the wire outlet nozzle 2 is inserted into the plug-in channel, the wire outlet channel inside the wire outlet nozzle 2 is connected to the output channel and the two are transitioned by a chamfer.
[0032] The inner peripheral wall of the insertion channel has a notch 1123 extending to the outer peripheral wall of the inner sleeve 1122. A pressure arm 1124 is formed at the notch 1123, which can be pressed against the wire outlet 2 in the insertion channel under the action of external force to fix the wire outlet 2. After the external force is removed, the pressure arm 1124 is reset, and the wire outlet 2 can move freely in the insertion channel, thereby facilitating the replacement of the wire outlet 2. The external force can be a bolt. The bolt is threadedly connected to the outer sleeve 1121 and abuts against the pressure arm 1124 to apply pressure to the pressure arm 1124.
[0033] The above description, based on the preferred embodiments of this utility model, provides inspiration. Those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification but must be determined according to the claims.
Claims
1. A laser welding machine with independent control for wire feeding and return, characterized in that: include: The wire feeding assembly (1) includes a wire feeding seat (101), a drive wheel (102) mounted on the wire feeding seat (101), a rotary drive mechanism for driving the drive wheel (102) to rotate, and a driven wheel (103) for cooperating with the drive wheel (102). The drive wheel (102) and the driven wheel (103) clamp the welding wire (7) between them and drive the welding wire (7) to move forward by rotating the drive wheel (102). The wire outlet nozzle (2) is disposed on the wire feeder (101) and is used to receive the welding wire (7) from the wire feeder assembly (1) and output the welding wire (7); The wire return assembly (3) includes a linear reciprocating drive mechanism (301), the output end of which is connected to the wire feeder (101) to drive the wire feed assembly (1) and the welding wire (7) it holds to retract.
2. The laser welding machine with independent control of wire feeding and return according to claim 1, characterized in that: The rotary drive mechanism includes a motor (104), a driving bevel gear (105) connected to the output end of the motor (104), and a driven bevel gear (106) meshing with the driving bevel gear (105) and fixed to the driving wheel (102).
3. The laser welding machine with independent control of wire feeding and return according to claim 1, characterized in that: A transition seat (302) is connected between the linear reciprocating drive mechanism (301) and the wire feeder (101), and the rotary drive mechanism is mounted on the transition seat (302).
4. The laser welding machine with independent control of wire feeding and return according to claim 2, characterized in that: The wire feeding assembly (3) also includes a mounting base (303) for mounting a linear reciprocating drive mechanism (301). One side of the mounting base (303) is formed with a guide groove (3031) for accommodating part of the motor (104) and guiding the movement of the motor (104). The other side is equipped with a slide rail (304). The wire feeding seat (101) is equipped with a slider (107) that cooperates with the slide rail (304).
5. A laser welding machine with independent control for wire feeding and return according to claim 4, characterized in that: A reset mechanism for resetting the wire feeder (101) is provided between the wire feeder (101) and the mounting base (303).
6. The laser welding machine with independent control of wire feeding and return according to claim 5, characterized in that: The reset mechanism includes a reset rod (305) fixed to the bottom of the mounting base (303) and passing through the adapter base (302) and an elastic element (306) sleeved on the reset rod (305). One end of the elastic element (306) abuts against the limiting part (3051) protruding from the bottom of the reset rod (305), and the other end abuts against the adapter base (302).
7. A laser welding machine with independent control for wire feeding and return according to claim 4, characterized in that: It also includes a cover (4) fixed to the mounting base (303), the wire feeder (101) has grooves (1011) recessed on both sides, and the open end of the cover (4) is bent to form a sliding part (401) that slides in cooperation with the grooves (1011).
8. The laser welding machine with independent control of wire feeding and return according to claim 1, characterized in that: An input gap (108), a clamping area (109), and an output gap (110) are sequentially formed between the driving wheel (102) and the driven wheel (103) along the wire feeding direction. The wire feeding assembly (1) also includes an input guide (111) for feeding the welding wire (7) to the clamping area (109) and an output guide (112) for feeding the welding wire (7) in the clamping area (109) to the wire outlet (2). The end of the input guide (111) near the clamping area (109) extends into the input gap (108), and the end of the output guide (112) near the clamping area (109) extends into the output gap (110).
9. A laser welding machine with independent control for wire feeding and return according to claim 8, characterized in that: The upstream side of the input guide nozzle (111) is equipped with a guide seat (5) with an internal guide channel, and a guide wheel (6) for guiding the welding wire (7) into the guide channel is installed inside the guide seat (5).
10. A laser welding machine with independent control of wire feeding and return according to claim 8, characterized in that: The output nozzle (112) includes an outer nozzle (1121) and an inner nozzle (1122) inserted into the outer nozzle (1121). The inner nozzle (1122) has a insertion channel for inserting the wire nozzle (2). The inner peripheral wall of the insertion channel has a notch (1123) extending to the outer peripheral wall of the inner nozzle (1122). A pressure arm (1124) is formed at the notch (1123) to press against the wire nozzle (2) in the insertion channel under external force to fix the wire nozzle (2).