Automatic butt-welding machine for eyebrow clips

Abstract

The invention relates to an eyebrow clamp automatic butt-welding machine which comprises a butt-welding main machine and a working table, and the working table is provided with a station rotating disc and further provided with a first feeding mechanism, a first detecting mechanism, a second feeding mechanism, a second detecting mechanism, a butt-welding positioning mechanism and a discharging mechanism which are sequentially arranged in the rotating direction of the station rotating disc. The butt-welding main machine is arranged on one side of the butt-welding positioning mechanism, a workpiece clamp is arranged on the edge of the top of the station rotary disc, a first clamping piece and a second clamping piece which form an eyebrow clamp are loaded in the first feeding mechanism and the second feeding mechanism in a stacked mode respectively, and a first inserting groove and a second inserting groove which correspond to the first clamping piece and the second clamping piece respectively are formed in the workpiece clamp. The station rotating disc rotates to drive the workpiece clamps to sequentially pass through the first feeding mechanism, the first detection mechanism, the second feeding mechanism, the second detection mechanism, the butt-welding positioning mechanism and the discharging mechanism to complete feeding, detection and positioning of the first clamping piece and the second clamping piece, then the first clamping piece and the second clamping piece are welded through the butt-welding main machine, and finally discharging is conducted through the discharging mechanism.

Description

Technical Field

[0001] This invention relates to the field of mechanical production technology, specifically an automatic eyebrow tweezers welding machine. Background Technology

[0002] Tweezers, as a commonly used makeup tool, typically have the following structure: Figure 1 The tweezers are formed by welding together the first clip 01 and the second clip 02, followed by stamping. The welding precision directly affects the clamping performance and lifespan of the tweezers. Currently, the welding process in tweezer production relies heavily on manual labor or semi-automatic equipment. Manual welding is not only inefficient and labor-intensive, but also prone to problems such as misalignment of clips and weak welds due to human error, affecting product qualification rates. Semi-automatic equipment suffers from disjointed feeding, inspection, positioning, and welding processes, requiring manual intervention to judge inspection results and adjust clip positions. This makes it impossible to achieve fully automated operation and meets the needs of large-scale mass production. Summary of the Invention

[0003] To solve the above technical problems, this invention provides an automatic eyebrow tweezers welding machine, which realizes fully automated operation from automatic feeding, dual detection, precise positioning to welding and unloading, improving welding accuracy and product qualification rate, increasing production efficiency and reducing labor costs.

[0004] An automatic spot welding machine for eyebrow tweezers includes a spot welding main unit and a worktable. The worktable is equipped with a station turntable and a first feeding mechanism, a first inspection mechanism, a second feeding mechanism, a second inspection mechanism, a spot welding positioning mechanism, and a discharge mechanism arranged sequentially along the rotation direction of the station turntable. The spot welding main unit is located on one side of the spot welding positioning mechanism. A workpiece fixture is provided on the top edge of the station turntable. The first feeding mechanism and the second feeding mechanism respectively load the first clip and the second clip that make up the eyebrow tweezers. The workpiece fixture is provided with a first slot and a second slot corresponding to the first clip and the second clip respectively. The rotation of the station turntable drives the workpiece fixture to pass through the first feeding mechanism, the first inspection mechanism, the second feeding mechanism, the second inspection mechanism, the spot welding positioning mechanism, and the discharge mechanism in sequence to complete the feeding and inspection positioning of the first clip and the second clip. After that, the first clip and the second clip are welded by the spot welding main unit and finally discharged by the discharge mechanism.

[0005] Furthermore, the workpiece fixture includes a fixture base, a clamping block disposed on the fixture base, and a fixing plate connected to the fixture base by screws and pressing the clamping block onto the fixture base. The clamping block is provided with a guide channel for the first clamping piece and the second clamping piece to enter. The end of the guide channel is provided with a partition block integrated with the clamping block. The partition block, the fixture base, and the fixing plate respectively form a first slot located in the lower layer and a second slot located in the upper layer.

[0006] Furthermore, the edge of the workstation turntable is provided with a radially arranged guide slide rail, and a guide slider is provided on the guide slide rail for sliding cooperation. The workpiece fixture is installed on the guide slider. Both ends of the guide slide rail are respectively provided with positioning seats fixed on the workstation turntable. The positioning seats are threaded with positioning screws that pass through them and whose ends abut against the side wall of the workpiece fixture.

[0007] Furthermore, the first feeding mechanism includes a first feeding frame fixed on the workbench and a first feeding cylinder disposed on one side of the bottom of the first feeding frame. The first feeding frame is provided with a first material groove for stacking and loading the first clamping pieces. The bottom of the first feeding frame is provided with a first discharge port on one side of the first material groove. The telescopic rod of the first feeding cylinder is connected to a first push block that pushes the first clamping piece out from the first discharge port and inserts it into the first slot of the workpiece fixture. The first push block is provided with a first limiting groove for accommodating the first clamping piece.

[0008] Furthermore, the first detection mechanism includes a first detection bracket fixed on the workbench, and a first detector for detecting the feeding status of the first clamping piece is fixed at the top of the first detection bracket.

[0009] Furthermore, the second feeding mechanism includes a second feeding frame fixedly installed on the workbench, a second feeding cylinder disposed on one side of the bottom of the second feeding frame, and a transfer cylinder assembly disposed on the workbench. The second feeding frame is provided with a second material groove for stacking and loading the second clamping pieces. The bottom of the second feeding frame is provided with a second discharge port on one side of the second material groove. A second push block is connected to the telescopic rod of the second feeding cylinder to push the second clamping pieces out of the second discharge port. The second push block is provided with a second limiting groove for accommodating the second clamping pieces. The transfer cylinder assembly includes a pneumatic slide table disposed on the workbench. A material picking and lifting cylinder is installed on the pneumatic slide table. A material picking rod for picking up the second clamping pieces from the second push block is connected to the telescopic rod of the material picking and lifting cylinder. The pneumatic slide table slides to drive the material picking rod to insert the second clamping pieces into the second slot of the workpiece fixture.

[0010] Furthermore, the second detection mechanism includes a pre-positioning cylinder installed on the workbench and arranged radially along the station turntable, a second detection bracket fixed on the cylinder body of the pre-positioning cylinder, and a second detector installed at the front end of the second detection bracket to detect the feeding status of the second clamping piece and to signal control the pre-positioning cylinder. A pre-positioning push block is connected to the telescopic rod of the pre-positioning cylinder, and a pre-positioning groove is provided on the front end face of the pre-positioning push block.

[0011] Furthermore, the spot welding positioning mechanism includes a spot welding positioning cylinder and a spot welding feed detector set on the workbench. A spot welding positioning push block is fixedly connected to the telescopic rod of the spot welding positioning cylinder. The front end face of the spot welding positioning push block is provided with a spot welding positioning groove that matches the shape of the first clamping piece and the second clamping piece. The spot welding feed detector detects the feeding status at the spot welding positioning mechanism and signals to control the spot welding host and the spot welding positioning cylinder.

[0012] Furthermore, the spot welding host includes a machine body and a spot welding gun and a spot welding table installed on the machine body. A spot welding positioning bracket is provided on the worktable to make way for the spot welding table. The spot welding positioning mechanism is installed on the spot welding positioning bracket. The spot welding table passes through the spot welding positioning bracket from below and is located on one side of the workstation turntable. The machine body is also equipped with a spot welding lifting cylinder that drives the spot welding gun to rise and fall to cooperate with the spot welding table to weld the first clamping piece and the second clamping piece.

[0013] Furthermore, the discharge mechanism includes a discharge bracket fixedly installed on the workbench, a discharge conveyor belt installed on the discharge bracket, and a discharge cylinder. The telescopic rod of the discharge cylinder is connected to a discharge clamp finger cylinder that takes out the eyebrow clip that has been spot welded from the workpiece fixture and sends the eyebrow clip to the discharge conveyor belt under the drive of the discharge cylinder.

[0014] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: The workpiece fixture is driven through each mechanism by the station turntable to complete the automatic feeding, dual detection, precise positioning, spot welding and automatic unloading of the first clamping piece and the second clamping piece. No manual intervention is required, which greatly improves production efficiency and reduces labor costs. It is suitable for large-scale mass production needs. The first and second inspection mechanisms are set up to inspect the feeding status of the first and second clamping plates, respectively. When there are workpieces that are not fed or are misaligned, the machine can be stopped in time for adjustment to avoid material waste. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the eyebrow clip in this invention.

[0017] Figure 2 This is a schematic diagram of the structure of the present invention.

[0018] Figure 3 This is a schematic diagram of the workstation turntable in the present invention.

[0019] Figure 4 This is a schematic diagram of the structure of the first feeding mechanism in this invention.

[0020] Figure 5 This is a schematic diagram of the structure of the second feeding mechanism in this invention.

[0021] Figure 6This is a schematic diagram of the structure of the second detection mechanism in this invention.

[0022] Figure 7 This is a schematic diagram of the welding positioning mechanism in this invention.

[0023] Figure 8 This is a schematic diagram of the welding host in this invention.

[0024] Figure 9 This is a schematic diagram of the material discharge mechanism in this invention.

[0025] Figure 10 This is a schematic diagram of the workpiece fixture in this invention.

[0026] Figure 11 This is another structural schematic diagram of the workpiece fixture in this invention.

[0027] Wherein: First clip 01; Second clip 02; Spot welding main unit 1: body 11; spot welding gun 12; spot welding table 13; spot welding lifting cylinder 14; Workbench 2: Spot-welded positioning bracket 21; Workstation turntable 3: guide rail 31; guide slider 32; positioning seat 33; positioning screw 34; First feeding mechanism A: First feeding frame A1; First material trough A11; First discharge port A12; First feeding cylinder A2; First push block A21; First limiting groove A211; First testing organization B: First testing bracket B1; First detector B2; Second feeding mechanism C: Second feeding frame C1; Second material trough C11; Second discharge port C12; Second feeding cylinder C2; Second push block C21; Second limit groove C211; Transfer cylinder assembly C3; Pneumatic slide C31; Material picking and lifting cylinder C32; Material picking rod C33; Second detection mechanism D: Pre-positioning cylinder D1; Pre-positioning push block D11; Pre-positioning groove D111; Second detection bracket D2; Second detector D3; Spot welding positioning mechanism E: Spot welding positioning cylinder E1; Spot welding positioning push block E11; Spot welding positioning groove E111; Spot welding feed detector E2; Discharge mechanism F: Discharge bracket F1; Discharge conveyor belt F2; Discharge cylinder F3; Discharge clamp cylinder F31; Workpiece fixture G: First slot G01; Second slot G02; Fixture base G1; Clamping block G2; Guide channel G21; Separator block G22; Fixed pressure plate G3. Detailed Implementation

[0028] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided.

[0029] Please see Figures 1-11 An automatic spot welding machine for eyebrow tweezers includes a spot welding main unit 1 and a worktable 2. The worktable 2 is equipped with a station turntable 3 driven by a servo motor, and a first feeding mechanism A, a first detection mechanism B, a second feeding mechanism C, a second detection mechanism D, a spot welding positioning mechanism E, and a discharge mechanism F arranged sequentially along the rotation direction of the station turntable 3. The spot welding main unit 1 is located on one side of the spot welding positioning mechanism E. A workpiece clamp G is provided on the top edge of the station turntable 3. The first feeding mechanism A and the second feeding mechanism C respectively stack and load the components that make up the eyebrow tweezers. The first clamping piece 01 and the second clamping piece 02 are respectively provided in the workpiece fixture G, which has a first slot G01 and a second slot G02 corresponding to the first clamping piece 01 and the second clamping piece 02. The station turntable 3 rotates and drives the workpiece fixture G to pass through the first feeding mechanism A, the first detection mechanism B, the second feeding mechanism C, the second detection mechanism D, the spot welding positioning mechanism E, and the unloading mechanism F in sequence to complete the feeding and detection positioning of the first clamping piece 01 and the second clamping piece 02. After that, the first clamping piece 01 and the second clamping piece 02 are welded by the spot welding host 1 and finally unloaded by the unloading mechanism F.

[0030] In this embodiment, the workpiece fixture G includes a fixture base G1, a clamping block G2 disposed on the fixture base G1, and a fixing plate G3 connected to the fixture base G1 by screws and pressing the clamping block G2 onto the fixture base G1. The clamping block G2 is provided with a guide channel G21 for the first clamping piece 01 and the second clamping piece 02 to enter. The end of the guide channel G21 is provided with a partition block G22 integral with the clamping block G2. The partition block G22, the fixture base G1, and the fixing plate G3 respectively form a first slot G01 located at the lower layer and a second slot G02 located at the upper layer. Specifically, when the first feeding mechanism A and the second feeding mechanism C feed materials respectively, the first clamping piece 01 is inserted into the first slot G01 at the lower layer, and the second clamping piece 02 is inserted into the second slot G02 at the upper layer. The partition block G22 is provided with a guiding inclined surface so that the first slot G01 and the second slot G02 are flared structures, which facilitates the insertion of the first clamping piece 01 and the second clamping piece 02 respectively.

[0031] In this embodiment, the edge of the workstation turntable 3 is provided with a radially arranged guide rail 31, and a guide slider 32 is provided on the guide rail 31 for sliding cooperation. The workpiece fixture G is mounted on the guide slider 32. Both ends of the guide rail 31 are respectively provided with positioning seats 33 fixed on the workstation turntable 3. The positioning seats 33 are threadedly connected with positioning screws 34 that pass through them and whose ends abut against the side wall of the workpiece fixture G. By rotating the positioning screws 34, the guide slider 32 can be pushed to slide along the guide rail 31, thereby adjusting the radial position of the workpiece fixture G on the workstation turntable 3, adapting to the clamping and welding requirements of different specifications of eyebrow clips, and improving the versatility of the equipment.

[0032] In this embodiment, the first feeding mechanism A includes a first feeding frame A1 fixed on the workbench 2 and a first feeding cylinder A2 disposed on one side of the bottom of the first feeding frame A1. The first feeding frame A1 is provided with a first material groove A11 for stacking and loading the first clamping pieces 01. The bottom of the first feeding frame A1 is provided with a first discharge port A12 on one side of the first material groove A11. The size of the first discharge port A12 matches the thickness of the first clamping piece 01, ensuring that only one first clamping piece 01 is allowed to pass through at a time. The telescopic rod of the first feeding cylinder A2 is connected to a first push block A21 that pushes the first clamping piece 01 out of the first discharge port A12 and inserts it into the first slot G01 of the workpiece fixture G. The first push block A21 is provided with a first limiting groove A211 for accommodating the first clamping piece 01. When pushing, the first clamping piece 01 is embedded in the first limiting groove A211, ensuring that the first clamping piece 01 does not deviate during the pushing process, and ensuring accurate insertion into the first slot G01 of the lower layer of the workpiece fixture G.

[0033] In this embodiment, the first detection mechanism B includes a first detection bracket B1 fixed on the workbench 2, and a first detector B2 for detecting the feeding status of the first clamping piece 01 is fixed at the top of the first detection bracket B1. The first detector B2 is a photoelectric sensor with its detection end facing upward. It detects whether the light is blocked and the distance of the blocking object to detect whether the first clamping piece 01 is successfully fed and whether the feeding position is accurate. If a missed feeding or misaligned feeding is detected, the equipment control system will issue an alarm and suspend the operation, so that the staff can deal with it in time and avoid empty welding or incorrect welding in subsequent processes.

[0034] In this embodiment, the second feeding mechanism C includes a second feeding frame C1 fixedly installed on the workbench 2, a second feeding cylinder C2 disposed on one side of the bottom of the second feeding frame C1, and a transfer cylinder assembly C3 disposed on the workbench 2. The second feeding frame C1 is provided with a second material groove C11 for stacking and loading the second clamping pieces 02. The bottom of the second feeding frame C1 is provided with a second discharge port C12 on one side of the second material groove C11. The telescopic rod of the second feeding cylinder C2 is connected to a device that pulls the second clamping pieces 02 from the second discharge port C12. The second pusher C21 introduced in step 12 has a second limiting groove C211 for accommodating the second clamping piece 02. The transfer cylinder assembly C3 includes a pneumatic slide C31 mounted on the worktable 2. A material-picking lifting cylinder C32 is installed on the pneumatic slide C31. A material-picking rod C33 for picking up the second clamping piece 02 from the second pusher C21 is connected to the telescopic rod of the material-picking lifting cylinder C32. The pneumatic slide C31 slides and drives the material-picking rod C33 to insert the second clamping piece 02 into the second slot G02 of the workpiece fixture G. Specifically, the bottom of the material-picking rod C33 can be equipped with a gripper or a vacuum suction cup to grasp the second clamping piece 02. After grasping, the pneumatic slide C31 drives the material-picking lifting cylinder C32 to approach the workpiece fixture G and insert the second clamping piece 02 into the second slot G02, realizing the transfer and loading of the second clamping piece 02. On the other hand, if the second clamping piece 02 is made of magnetic metal, a magnet can be installed at the bottom of the picking rod C33 to enable the second clamping piece 02 to be gripped.

[0035] In this embodiment, the second detection mechanism D includes a pre-positioning cylinder D1 installed on the workbench 2 and arranged radially along the workstation turntable 3, a second detection bracket D2 fixed on the cylinder body of the pre-positioning cylinder, and a second detector D3 installed at the front end of the second detection bracket D2 to detect the feeding status of the second clamping piece 02 and to signal control the pre-positioning cylinder D1. A pre-positioning push block D11 is connected to the telescopic rod of the pre-positioning cylinder D1, and a pre-positioning groove D111 is provided on the front end surface of the pre-positioning push block D11. Specifically, the pre-positioning slot D111 has a V-shaped groove structure, and the second detector D3 is a photoelectric sensor with its detection end facing downwards. By detecting whether its light is blocked and the distance of the blocking object, it is used to detect whether the second clamp 02 is successfully loaded and whether the loading position is accurate. When the second detector D3 detects that the second clamp 02 is correctly loaded, the pre-positioning cylinder D1 drives the pre-positioning push block D11 to extend. The pre-positioning slot D111 on the pre-positioning push block D11 contacts the ends of the first clamp 01 and the second clamp 02 and aligns and calibrates the first clamp 01 and the second clamp 02 through its V-shaped groove structure and pushes them into the first slot G01 and the second slot G02 respectively, eliminating the slight offset generated during loading or rotation of the station turntable 3.

[0036] In this embodiment, the spot welding positioning mechanism E includes a spot welding positioning cylinder E1 and a spot welding feed detector E2 set on the workbench 2. A spot welding positioning push block E11 is fixedly connected to the telescopic rod of the spot welding positioning cylinder E1. The front end face of the spot welding positioning push block E11 is provided with a spot welding positioning groove E111. The spot welding positioning groove E111 has a V-shaped groove structure. The spot welding feed detector E2 detects the feeding situation at the spot welding positioning mechanism E and signals to control the spot welding host 1 and the spot welding positioning cylinder E1. Specifically, the spot welding feed detector E2 adopts a proximity switch. The bottom edge of the workstation turntable 2 is equipped with a switch sensing piece corresponding to the position of the workpiece fixture. The position of the workpiece can be reflected by detecting the position of the workpiece fixture G through the spot welding feed detector E2. After the workpiece is detected to be in place, the spot welding positioning cylinder E1 is controlled to drive the spot welding positioning push block E11 to extend and hold the first clamping piece 01 and the second clamping piece 02. The first clamping piece 01 and the second clamping piece 02 are aligned again through the V-groove structure of the spot welding positioning groove E111. Then the spot welding host 1 welds the first clamping piece 01 and the second clamping piece 02.

[0037] In this embodiment, the spot welding host 1 includes a body 11 and a spot welding gun 12 and a spot welding table 13 disposed on the body 11. The workbench 2 is provided with a spot welding positioning bracket 21 to make way for the spot welding table 13. The spot welding positioning mechanism E is disposed on the spot welding positioning bracket 21. The spot welding table 13 passes through the spot welding positioning bracket 21 from below and is disposed on one side of the workstation turntable 3. The body 11 is also provided with a spot welding lifting cylinder 14 that drives the spot welding gun 12 to rise and fall to cooperate with the spot welding table 13 to weld the first clamping piece 01 and the second clamping piece 02.

[0038] In this embodiment, the unloading mechanism F includes an unloading bracket F1 fixedly installed on the workbench 2, an unloading conveyor belt F2 installed on the unloading bracket F1, and an unloading cylinder F3. The telescopic rod of the unloading cylinder F3 is connected to an unloading clamping cylinder F31 that removes the welded eyebrow clip from the workpiece fixture G and, driven by the unloading cylinder F3, delivers the eyebrow clip to the unloading conveyor belt F2. Specifically, the inner side of the clamping fingers of the unloading clamping cylinder F31 is provided with an elastic pad to prevent damage to the surface of the eyebrow clip during gripping. After welding is completed, the station turntable 3 drives the workpiece fixture G to the unloading station. The unloading clamping cylinder F31 then grips the welded eyebrow clip. Subsequently, the unloading cylinder F3 drives the unloading clamping cylinder F31 to move above the unloading conveyor belt F2, the grippers release, and the eyebrow clip is placed on the conveyor belt. The conveyor belt then transports the welded workpiece to the subsequent station, achieving automatic unloading and completing the fully automated operation.

[0039] The working principle of this invention is as follows: The servo motor drives the turntable to rotate, the workpiece clamp G reaches the first feeding mechanism A, the first feeding cylinder A2 is activated, pushing the first clamping piece 01 out of the first material groove A11 and inserting it into the first slot G01; the turntable rotates to the first detection mechanism B, the first detector B2 detects the feeding status of the first clamping piece 01; then it reaches the second feeding mechanism C, the second feeding cylinder C2 cooperates with the transfer cylinder assembly C3 to insert the second clamping piece 02 into the second slot G02; then it reaches the second detection mechanism D, the second detector D3 detects the feeding status of the second clamping piece 02 and triggers the pre-positioning cylinder D1 to complete the pre-calibration; then it reaches the spot welding positioning mechanism E, the spot welding infeed detector E2 detects the position, the spot welding positioning cylinder E1 holds the first clamping piece 01 and the second clamping piece 02, and the spot welding host 1 starts welding; finally it reaches the discharge mechanism F, the discharge clamping cylinder F31 grabs the completed eyebrow clamp, and it is transported to the collection area by the discharge conveyor belt F2 to complete one work cycle.

[0040] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. An automatic spot welding machine for eyebrow tweezers, comprising a spot welding main unit and a worktable, characterized in that, The workbench is equipped with a turntable and, along the rotation direction of the turntable, a first feeding mechanism, a first inspection mechanism, a second feeding mechanism, a second inspection mechanism, a spot welding positioning mechanism, and a discharge mechanism. The spot welding host is located on one side of the spot welding positioning mechanism. A workpiece fixture is provided on the top edge of the turntable. The first feeding mechanism and the second feeding mechanism respectively load the first clamping piece and the second clamping piece that make up the eyebrow clip. The workpiece fixture is provided with a first slot and a second slot corresponding to the first clamping piece and the second clamping piece, respectively. The rotation of the turntable drives the workpiece fixture to pass through the first feeding mechanism, the first inspection mechanism, the second feeding mechanism, the second inspection mechanism, the spot welding positioning mechanism, and the discharge mechanism in sequence to complete the feeding and inspection positioning of the first clamping piece and the second clamping piece. After that, the first clamping piece and the second clamping piece are welded by the spot welding host and finally discharged by the discharge mechanism.

2. The automatic eyebrow tweezers welding machine according to claim 1, characterized in that, The workpiece fixture includes a fixture base, a clamping block disposed on the fixture base, and a fixing plate connected to the fixture base by screws and pressing the clamping block on the fixture base. The clamping block is provided with a guide channel for the first clamping piece and the second clamping piece to enter. The end of the guide channel is provided with a partition block integrated with the clamping block. The partition block, the fixture base, and the fixing plate respectively form a first slot located at the lower layer and a second slot located at the upper layer.

3. The automatic eyebrow tweezers welding machine according to claim 1, characterized in that, The edge of the workstation turntable is provided with radially arranged guide rails, and guide sliders are provided on the guide rails for sliding cooperation. The workpiece fixture is installed on the guide sliders. Both ends of the guide rails are provided with positioning seats fixed on the workstation turntable. Positioning screws are threadedly connected to the positioning seats, which pass through them and whose ends abut against the side wall of the workpiece fixture.

4. An automatic eyebrow tweezers welding machine according to claim 1 or 2, characterized in that, The first feeding mechanism includes a first feeding frame fixed on the workbench and a first feeding cylinder disposed on one side of the bottom of the first feeding frame. The first feeding frame is provided with a first material groove for stacking and loading the first clamping pieces. The bottom of the first feeding frame is provided with a first discharge port on one side of the first material groove. The telescopic rod of the first feeding cylinder is connected to a first push block that pushes the first clamping piece out from the first discharge port and inserts it into a first slot of the workpiece fixture. The first push block is provided with a first limiting groove for accommodating the first clamping piece.

5. An automatic eyebrow tweezers welding machine according to claim 1, characterized in that, The first detection mechanism includes a first detection bracket fixed on the workbench, and a first detector for detecting the feeding status of the first clamping piece is fixed at the top of the first detection bracket.

6. An automatic eyebrow tweezers welding machine according to claim 1 or 2, characterized in that, The second feeding mechanism includes a second feeding rack fixedly installed on the workbench, a second feeding cylinder disposed on one side of the bottom of the second feeding rack, and a transfer cylinder assembly disposed on the workbench. The second feeding rack is provided with a second material groove for stacking and loading the second clamping pieces. The bottom of the second feeding rack is provided with a second discharge port on one side of the second material groove. A second push block is connected to the telescopic rod of the second feeding cylinder to push the second clamping pieces out of the second discharge port. The second push block is provided with a second limiting groove for accommodating the second clamping pieces. The transfer cylinder assembly includes a pneumatic slide table disposed on the workbench. A material picking and lifting cylinder is installed on the pneumatic slide table. A material picking rod is connected to the telescopic rod of the material picking and lifting cylinder to pick up the second clamping pieces from the second push block. The pneumatic slide table slides to drive the material picking rod to insert the second clamping pieces into the second slot of the workpiece fixture.

7. An automatic eyebrow tweezers welding machine according to claim 1, characterized in that, The second detection mechanism includes a pre-positioning cylinder installed on the workbench and arranged radially along the station turntable, a second detection bracket fixed on the cylinder body of the pre-positioning cylinder, and a second detector installed at the front end of the second detection bracket to detect the feeding status of the second clamping piece and to signal control the pre-positioning cylinder. A pre-positioning push block is connected to the telescopic rod of the pre-positioning cylinder, and a pre-positioning groove is provided on the front end face of the pre-positioning push block.

8. An automatic eyebrow tweezers welding machine according to claim 1, characterized in that, The spot welding positioning mechanism includes a spot welding positioning cylinder and a spot welding feed detector set on the workbench. A spot welding positioning push block is fixedly connected to the telescopic rod of the spot welding positioning cylinder. The front end face of the spot welding positioning push block is provided with a spot welding positioning groove that matches the shape of the first clamping piece and the second clamping piece. The spot welding feed detector detects the feeding status at the spot welding positioning mechanism and signals to control the spot welding host and the spot welding positioning cylinder.

9. An automatic eyebrow tweezers welding machine according to claim 1 or 8, characterized in that, The spot welding main unit includes a machine body and a spot welding gun and a spot welding table installed on the machine body. A spot welding positioning bracket is provided on the worktable to make way for the spot welding table. The spot welding positioning mechanism is installed on the spot welding positioning bracket. The spot welding table passes through the spot welding positioning bracket from below and is located on one side of the workstation turntable. The machine body is also equipped with a spot welding lifting cylinder that drives the spot welding gun to rise and fall to cooperate with the spot welding table to weld the first clamping piece and the second clamping piece.

10. An automatic eyebrow tweezers welding machine according to claim 1, characterized in that, The unloading mechanism includes an unloading bracket fixedly installed on the workbench, an unloading conveyor belt installed on the unloading bracket, and an unloading cylinder. The telescopic rod of the unloading cylinder is connected to an unloading clamp cylinder that takes out the eyebrow clip that has been spot welded from the workpiece fixture and sends the eyebrow clip to the unloading conveyor belt under the drive of the unloading cylinder.

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