Flexible automatic projection welding integrated workstation
The flexible automatic projection welding integrated workstation solves the problem of low precision in manual workpiece handling by using flexible fixtures and automatic feeding fixtures, achieving efficient, smooth and high-quality chassis welding.
Patent Information
- Application Number
- CN202423224497.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-25
- Publication Date
- 2025-12-09
- Estimated Expiration
- 2034-12-25
AI Technical Summary
Manual handling of workpieces and low alignment accuracy, coupled with the lack of pre-fixation of workpieces, lead to a decline in the welding quality of the vehicle frame.
The flexible automatic projection welding integrated workstation includes a flexible fixture, a nut feeding fixture, an automatic feeding fixture, and a projection welding mechanism. The flexible fixture fixes the frame, and the automatic feeding fixture accurately delivers the nuts, ensuring the precise positioning and alignment of the workpiece with the frame.
This improved the alignment accuracy between the workpiece and the chassis, reduced manual operation time, ensured welding quality and efficiency, and achieved efficient, smooth, and high-quality chassis welding.
Smart Images
Figure CN223642955U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of projection welding mechanisms, and in particular to a flexible automatic projection welding integrated workstation. Background Technology
[0002] Projection welding is a type of resistance welding. It utilizes the resistance heat generated when an electric current passes through the workpiece as a heat source. Sufficient heat brings the projection metal to a suitable plastic state, and then pressure is applied to crush the projection, thus forming a strong connection between the two workpieces and achieving the welding effect.
[0003] In related technologies, automotive frame components are welded together using projection welding, which combines metal rods and nuts of different shapes to withstand the weight of a person and various forces during vehicle operation, thus improving the overall rigidity of the frame. The operator places the frame on a welding platform, then places the workpieces to be welded onto the corresponding welding points on the frame. After welding, the frame is removed.
[0004] Regarding the aforementioned technologies, the accuracy of manually picking up and placing workpieces and manually aligning them with the corresponding positions on the chassis is low. Furthermore, the workpieces to be welded are prone to displacement due to the lack of pre-fixation, which reduces the quality of chassis welding. Utility Model Content
[0005] To improve the low accuracy of manual workpiece handling and the lack of pre-fixation of workpieces, and to enhance the welding quality of the vehicle frame, this application provides a flexible automatic projection welding integrated workstation.
[0006] The flexible automatic projection welding integrated workstation provided in this application adopts the following technical solution:
[0007] A flexible automatic projection welding integrated workstation includes an equipment base, a mounting base plate disposed on the equipment base, a projection welding mechanism disposed on one side of the mounting base plate for welding operations, a flexible clamping fixture disposed on the mounting base plate for fixing a frame, a nut feeding fixture for holding a number of nuts, and an automatic feeding fixture for transferring the nuts from the nut feeding fixture to the welding point, wherein the automatic feeding fixture is disposed on one side of the projection welding mechanism.
[0008] By adopting the above technical solutions and setting up flexible fixtures to fix the chassis, compared with manual placement of the chassis, precise positioning of the chassis on the welding platform can be achieved, ensuring that the chassis is in a standard and accurate position during each welding operation. The automatic feeding fixture transfers the nuts from the nut feeding fixture to the welding point. The automated feeding and alignment process is more precise than manual operation, improving the alignment accuracy between the workpiece and the chassis and ensuring welding accuracy. The automated material preparation mechanism composed of the nut feeding fixture and the automatic feeding fixture, along with the flexible fixtures, reduces the time required for manual handling and alignment operations, making the entire welding process smoother and more efficient. While ensuring welding quality, it also helps to improve the efficiency of chassis welding production.
[0009] Furthermore, the nut feeding fixture includes a vibratory feeder, a guide square tube, and a first adjusting frame disposed on the vibratory feeder and used to adjust the position of the guide square tube. The vibratory feeder has a discharge port for discharging a single nut to be welded, and the inlet of the guide square tube is aligned with the position of the discharge port.
[0010] The first adjustment frame includes a first L-shaped connecting rod, a first lifting adjustment seat fixedly connected to the vibratory plate base, and a first horizontal adjustment seat for fixed connection with the guide square tube. The L-shaped connecting tube has an integrally connected vertical part and a horizontal part. The vertical part is slidably installed on the first lifting fixed seat, and the first horizontal adjustment seat is slidably installed on the horizontal part.
[0011] By adopting the above technical solution, the vibratory feeder uses the principle of vibration to screen and sort the nuts it holds, allowing them to be discharged individually from the outlet, avoiding nut clustering and ensuring that the nuts enter the guide tube in an orderly and sequential manner. The first lifting adjustment seat in the first adjusting frame slides and engages with the vertical part of the first L-shaped connecting rod, allowing for flexible adjustment of the guide tube's vertical position. The first horizontal adjustment seat slides and engages with the horizontal part of the first L-shaped connecting rod, allowing for horizontal adjustment of the guide tube. This ensures that the inlet of the guide tube is aligned with the outlet of the vibratory feeder, forming a relatively closed and continuous material conveying channel, enabling the nuts to move smoothly along the guide tube after exiting the vibratory feeder.
[0012] Furthermore, the automatic feeding fixture includes a receiving guide seat for receiving the nut inside the guide square tube, a pushing sleeve assembly for pushing the nut of the receiving guide seat to the welding station, and a second adjusting frame for installing and adjusting the position of the pushing sleeve assembly.
[0013] The push sleeve assembly includes an outer cylinder and an inner rod. The receiving guide seat is installed at the end of the outer cylinder near the projection welding mechanism. A movable baffle for blocking the nut is movably connected to the receiving guide seat.
[0014] By adopting the above technical solution, the receiving guide seat can effectively receive the nuts transported from the guide tube, serving as a transition and ensuring that the nuts can smoothly enter the subsequent pushing stage after exiting the guide tube. The outer cylinder and inner rod in the pushing sleeve assembly cooperate to push the nuts on the receiving guide seat to the welding position with relatively high precision. The outer cylinder provides a stable pushing channel, within which the inner rod can reciprocate, precisely controlling the pushing distance and direction of the nuts. This allows the nuts to accurately reach the corresponding welding point on the frame according to the preset position, greatly improving the positioning accuracy of nut loading.
[0015] Furthermore, the flexible clamping fixture includes a flexible support assembly disposed on the mounting base plate and used to support the vehicle frame, a pneumatic pressure block disposed on the mounting base plate and cooperating with the flexible support assembly, and a connecting corner piece for mounting the pneumatic pressure block. The connecting corner piece has a right-angle structure for cooperating with the mounting base plate and the cylinder respectively, and the connecting corner piece is fixedly connected to both the mounting base plate and the cylinder of the pneumatic pressure block.
[0016] The flexible support assembly includes an abutment end for the underside of the frame to abut, with the underside of the pneumatic pressure block directly opposite the abutment end.
[0017] By adopting the above technical solution, the flexible support component is installed on the mounting base plate to support the vehicle frame. Its abutment end fits snugly against the lower side of the frame, providing a stable support foundation and ensuring the frame remains stable on the welding platform, preventing wobbling or shifting during welding due to unstable support. The flexible support component works in conjunction with a pneumatic pressure block, with the lower side of the pneumatic pressure block directly facing the abutment end. This allows the frame to be precisely fixed in the intended position after being placed on the flexible support component, through the downward pressure of the pneumatic pressure block. The frame can be effectively positioned both vertically and horizontally, ensuring the accuracy of the frame's position relative to the projection welding mechanism and the welding points during each welding operation, thus improving the precision of subsequent welding operations.
[0018] Furthermore, the flexible support assembly also includes a mounting corner seat fixedly connected to the mounting base plate, and a floating member disposed within the mounting corner seat. The mounting corner seat has a columnar groove at the corresponding position of the pneumatic pressure block for mounting the floating member and the abutment end. The abutment end has a sliding rod integrally connected to its lower part for cooperating with the floating member. The floating member is sleeved on the outside of the sliding rod, and the end of the floating member abuts against the lower side of the abutment end. The mounting corner seat has a through hole for the sliding rod to pass through. The through hole is coaxially opened with the columnar groove and communicates with it. The diameter of the through hole is smaller than the outer diameter of the floating member. The mounting base plate has a reserved through hole at the corresponding position of the through hole for the sliding rod to pass through.
[0019] By adopting the above technical solution, the floating component is sleeved outside the sliding rod and abuts against the lower side of the abutment end, giving the abutment end a certain floating characteristic. When the frame is placed above the abutment end, the abutment end can generate a certain displacement relative to the floating component through the sliding rod, playing a role in buffering and adaptive adjustment. The floating buffering mechanism can better adapt to the subtle positional changes of the frame during the welding process, ensuring that the frame can always receive stable support and improving the flexibility and adaptability of the support.
[0020] Furthermore, the mounting base plate is also provided with a tapered positioning end for passing through a pre-drilled hole on the frame and a three-way adjustment assembly for installing and adjusting the tapered positioning end. The three-way adjustment assembly includes an adjustment corner block, a mounting corner block, an intermediate connecting block, a first spacer block, a second spacer block, and a positioning pin.
[0021] The adjusting corner block has a first strip-shaped connecting block and a second strip-shaped connecting block that are perpendicular to each other. The first strip-shaped connecting block has a plurality of Z-direction pin grooves spaced apart for the positioning pin to pass through and be fixed. The second strip-shaped connecting block has a plurality of X-direction pin grooves spaced apart for the positioning pin to pass through and be fixed.
[0022] The mounting corner block has a third strip-shaped connecting block and a mounting block arranged perpendicularly to each other. The third strip-shaped connecting block has a plurality of Y-direction pin grooves spaced apart for the positioning pins to pass through and be fixed. The mounting block has a vertical mounting through hole for the tapered positioning end to pass through and be fixedly connected.
[0023] Both the first spacer block and the second spacer block are provided with multiple U-shaped adjustment slots arranged at equal intervals. The intermediate connecting block is provided with mating pin slots on its two perpendicular sides, which are matched with each of the U-shaped adjustment slots and through which the positioning pins pass.
[0024] By adopting the above technical solution, the three-way adjustment assembly enables the tapered positioning end to achieve precise positioning of the frame in the X, Y, and Z directions. By adjusting the Z-direction and X-direction pin slots on the corner blocks, the Y-direction pin slot on the mounting corner blocks, and the corresponding positioning pins, the position of the tapered positioning end in each direction can be flexibly adjusted according to the specific location of the pre-drilled holes on the frame. This ensures that it accurately passes through the pre-drilled holes, thereby precisely fixing the frame to the expected position on the mounting base plate and improving the accuracy of frame placement.
[0025] Furthermore, the mounting base plate is equipped with a nut leakage detection component, which includes a laser detection probe and a lifting drive cylinder mounted on the mounting base plate for adjusting the position of the laser detection probe.
[0026] By adopting the above technical solution, the laser inspection probe features high precision and non-contact inspection, enabling it to inspect the welding condition of nuts on the frame with extremely high accuracy, accurately determining whether any nuts are missing. Compared to traditional methods such as manual visual inspection, the laser inspection probe is unaffected by human factors such as visual fatigue and distraction, precisely capturing the positional information of the nuts, greatly improving inspection accuracy and effectively preventing frames with missing nuts from entering the next production stage due to inspection errors. The lifting drive cylinder can adjust the position of the laser inspection probe, facilitating flexible adjustment of its vertical height according to actual conditions, ensuring that the laser beam accurately covers the nut area to be inspected, guaranteeing the effectiveness of the inspection.
[0027] Furthermore, the equipment base is provided with a sliding base on top that cooperates with the mounting base plate. The two sides of the equipment base are provided with slide rails near the edge that cooperate with the sliding base. The sliding base includes a sliding base plate and a slider fixedly connected to the lower side of the sliding base plate and used to cooperate with the slide rail. The equipment base is provided with a servo transmission mechanism that drives the sliding base to move closer to / away from the projection welding mechanism.
[0028] By adopting the above technical solution, the servo drive mechanism drives the sliding base to move closer to or away from the projection welding mechanism along the slide rails on both sides of the equipment base. On the one hand, this facilitates the adjustment of the position of the mounting base plate and the workpiece to be welded relative to the projection welding mechanism. After loading and clamping, the base moves closer to the projection welding mechanism; after welding, it moves away from the mechanism and is unloaded. On the other hand, when there are multiple welding points on the frame, the relative position of the frame and the projection welding mechanism can be quickly adjusted by the servo drive mechanism, thereby improving welding efficiency.
[0029] Furthermore, the upper side of the equipment base is provided with a limit sensing probe for sensing the position of the sliding base plate on the side near the projection welding mechanism, and the upper side of the sliding base plate is provided with a laser receiving plate for cooperating with the limit sensing probe on the side near the projection welding mechanism.
[0030] By adopting the above technical solution, the cooperation between the limit sensor probe and the laser receiving plate provides a high-precision positioning feedback mechanism for the movement of the sliding base. When the sliding base approaches the projection welding mechanism under the drive of the servo transmission mechanism, the limit sensor probe can detect the position of the laser receiving plate in real time. Once the preset welding position is reached, it can immediately send a signal to stop the servo transmission mechanism, ensuring that each welding point can accurately fall into the predetermined position, thus improving welding accuracy. When there are multiple welding points on the frame, the relative position between the frame and the projection welding mechanism needs to be frequently adjusted. The limit sensor probe and the laser receiving plate can ensure that after each position adjustment, the frame can be accurately positioned for welding, allowing the projection welding mechanism to perform stable and precise welding operations for each welding point.
[0031] Furthermore, an insulating base plate is provided between the sliding base plate and the mounting base plate. The insulating base plate has multiple insulating connectors on its lower side, and each insulating connector is fixedly connected between the insulating base plate and the sliding base plate. The insulating base plate has multiple connecting posts arranged on its upper side for fixing and connecting the mounting base plate.
[0032] By adopting the above technical solution, an insulating isolation zone is constructed between the insulating base plate and related connecting parts below the flexible fixture tooling and servo transmission mechanism. During projection welding, the welding current can be strictly limited within a predetermined current loop formed by the projection welding mechanism, the frame, and the nut or other welded parts. This prevents current diversion to non-welded components such as the servo transmission mechanism, ensuring that the welding current is precisely applied to the welding area between the nut and the frame according to the set parameters. This allows the nut to receive stable and sufficient heat input during welding, thereby forming a high-strength weld and ensuring that each nut is firmly welded to the frame, improving the overall structural strength and reliability of the frame.
[0033] In summary, this application includes at least one of the following beneficial technical effects:
[0034] 1. By setting up flexible fixtures (including flexible support components, pneumatic pressure blocks, etc.), conical positioning ends and three-way adjustment components, limit sensing probes and laser receiving plates, the frame is accurately positioned and fixed on the welding platform, ensuring the accuracy of the frame's position relative to the projection welding mechanism and the welding points, and ensuring that each weld point falls accurately in the predetermined position. The automated material preparation and fixing system, consisting of flexible fixtures, nut feeding fixtures and automatic feeding fixtures, reduces the time spent on manual handling, alignment and other operations, making the welding process smoother and more efficient.
[0035] 2. By using a nut feeding fixture (vibrating plate, guide square tube and first adjustment frame) and an automatic feeding fixture, nuts are transported to the welding points in an orderly and accurate manner. In addition, the nut leakage detection component (laser detection probe and lifting drive cylinder) accurately detects the nut welding status, avoiding problems such as missing nuts, further ensuring welding quality, and making the nut welding of the frame firm and reliable.
[0036] 3. Driven by a servo transmission mechanism, the sliding base can move flexibly along the slide rail. Combined with the limit sensor probe and laser receiving plate, it can achieve precise positioning, which facilitates the adjustment of the relative position of the workpiece and the projection welding mechanism. This makes it faster to complete the loading, welding and unloading processes. Especially when there are multiple welding points on the frame, the position can be quickly adjusted, effectively shortening the welding cycle and improving the overall efficiency of frame welding production. Attached Figure Description
[0037] Figure 1 This is a schematic diagram of the overall structure of a flexible automatic projection welding integrated workstation according to an embodiment of this application.
[0038] Figure 2 This is a schematic diagram of the overall structure of the nut feeding fixture and automatic feeding fixture in the embodiments of this application.
[0039] Figure 3 yes Figure 1 Enlarged schematic diagram of the structure of the first lifting adjustment seat in section A.
[0040] Figure 4 yes Figure 2 Enlarged schematic diagram of the automatic feeding fixture in section B.
[0041] Figure 5 This is a partial structural schematic diagram of the flexible fixture, three-way adjustment assembly, nut leak detection assembly, servo transmission mechanism and limit sensing probe in the embodiments of this application.
[0042] Figure 6 yes Figure 1 Enlarged schematic diagram of the insulating connector in section C.
[0043] Figure 7 yes Figure 5 Enlarged schematic diagram of the pneumatic pressure block and flexible support assembly in section D.
[0044] Figure 8 This is a cross-sectional structural diagram of the flexible support component in the embodiments of this application.
[0045] Figure 9 This is a schematic diagram of the overall structure of the three-way adjustment component in the embodiments of this application. Figure 1 .
[0046] Figure 10 This is a schematic diagram of the overall structure of the three-way adjustment component in the embodiments of this application. Figure 2 .
[0047] Explanation of reference numerals in the attached drawings: 1. Equipment base; 11. Base mounting plate; 12. Sliding base; 121. Sliding base plate; 122. Sliding block; 123. Slide rail; 124. Servo transmission mechanism; 13. Insulating base plate; 131. Insulating connector; 14. Limit sensor probe; 141. Laser receiving plate; 2. Mounting base plate; 21. Connecting column; 22. Reserved through hole; 23. Conical positioning end; 24. Three-way adjustment assembly; 241. Adjusting corner block; 2411. First strip-shaped connecting block; 24111. Z-direction pin groove; 2412. Second strip-shaped connecting block; 24121. X-direction pin groove; 242. Mounting corner block; 2421. Third strip-shaped connecting block; 24211. Y-direction pin groove; 2422. Mounting block; 243. Intermediate connecting block; 2431. Mating pin groove; 244. First spacer block; 2441. U-shaped adjusting groove; 245. Second... 246. Spacer block; 3. Positioning pin; 4. Projection welding mechanism; 5. Flexible clamping fixture; 6. Flexible support assembly; 7. Abutment end; 8. Sliding rod; 9. Mounting angle bracket; 10. Columnar groove; 11. Through hole; 12. Floating component; 13. Pneumatic pressure block; 24. Connecting angle bracket; 3. Nut feeding fixture; 45. Vibratory feeder; 56. Guide square tube; 57. First adjusting frame; 88. The first adjusting frame; 99. The second adjusting frame. 532. L-shaped connecting rod; 533. First lifting adjustment seat; 534. First horizontal adjustment seat; 6. Automatic feeding fixture; 61. Receiving guide seat; 615. Feed port; 616. Discharge port; 617. Movable baffle; 62. Push sleeve assembly; 628. Outer cylinder; 629. Inner rod; 630. Second adjusting frame; 631. Second L-shaped connecting rod; 632. Second lifting adjustment seat; 633. Second horizontal adjustment seat. Detailed Implementation
[0048] To make the purpose, technical solution, and advantages of this application clearer, the following description is provided in conjunction with the appendix. Figure 1-10 The present application will be further described in detail with reference to the embodiments.
[0049] This application discloses a flexible automated projection welding integrated workstation. (Refer to...) Figure 1 The flexible automatic projection welding integrated workstation includes an equipment base 1, a mounting base plate 2 located above the equipment base 1 for mounting other components, a projection welding mechanism 3 located on one side of the equipment base 1 and the mounting base plate 2 for welding operations, a flexible clamping fixture 4 located on the mounting base plate 2 for fixing the frame, a nut feeding fixture 5 for holding several nuts, and an automatic feeding fixture 6 for transferring the nuts from the nut feeding fixture 5 to the welding point on the frame.
[0050] Reference Figure 1 and Figure 2 The nut feeding fixture 5 includes a vibratory feeder 51, a guide tube 52, and a first adjusting frame 53. The vibratory feeder 51 has a discharge port for discharging a single nut to be welded, and the inlet of the guide tube 52 is aligned with the discharge port and fixedly connected to the vibratory feeder 51. The first adjusting frame 53 is located adjacent to the vibratory feeder 51 on the side near the projection welding mechanism 3 and is used to adjust the position of the guide tube 52.
[0051] Combination Figure 3 The first adjusting frame 53 includes a first L-shaped connecting rod 531, a first lifting adjusting seat 532 fixedly connected to the base of the vibrating plate 51, and a first horizontal adjusting seat 533 for fixed connection with the guide square tube 52. The L-shaped connecting tube has a vertical part and a horizontal part that are perpendicular to each other and integrally connected. The vertical part is slidably installed on the first lifting fixing seat and fixed by bolts, and the first horizontal adjusting seat 533 is slidably installed on the horizontal part and fixed by bolts.
[0052] Reference Figure 2 and Figure 4 The automatic feeding fixture 6 includes a receiving guide seat 61 for receiving nuts inside the guide square tube 52, a push sleeve assembly 62 for pushing the nuts into the receiving guide seat 61 to the welding station, and a second adjustment frame 63 for installing and adjusting the position of the push sleeve assembly 62.
[0053] The push sleeve assembly 62 includes an outer cylinder 621 and an inner rod 622 that slides inside the outer cylinder 621. The outer diameter of the inner rod 622 gradually decreases near its end to abut against the outer wall of the nut. A receiving guide seat 61 is fixedly connected to the end of the outer cylinder 621 near the projection welding mechanism 3. The receiving guide seat 61 has a feed port 611 on its upper side for the nut to enter. A flexible hose (not shown in the figure) is used to connect the lower end outlet of the guide square tube 52 to the feed port 611 of the receiving guide seat 61, thereby providing a closed transmission channel for the nut.
[0054] The receiving guide seat 61 has a discharge port 612 on the side away from the end of the outer cylinder 621, and a movable baffle 613 is hinged to the receiving guide seat 61 at the discharge port 612. When a nut falls from the guide square tube 52 into the hose and enters the receiving guide seat 61, the movable baffle 613 temporarily limits the nut. The inner rod 622 extends from the outer cylinder 621, pushes the nut out of the discharge port 612 of the receiving guide seat 61 and opens the movable baffle 613, and then pushes the nut to the welding position on the frame.
[0055] The structure of the second adjusting frame 63 is the same as that of the first adjusting frame 53. The second adjusting frame 63 includes a second L-shaped connecting rod 631, a second lifting adjusting seat 632, and a second horizontal adjusting seat 633. The second lifting adjusting seat 632 is fixedly connected to the side wall of the projection welding mechanism 3. The vertical part of the second L-shaped connecting rod 631 is installed on the second lifting adjusting seat 632. The second horizontal adjusting seat 633 is installed on the horizontal part of the second L-shaped connecting rod 631. The outer cylinder 621 is fixedly connected to the second horizontal adjusting seat 633.
[0056] Reference Figure 1 and Figure 5 The equipment base 1 has two symmetrically arranged base mounting plates 11 on both sides, and both base mounting plates 11 are fixedly connected to the top side of the equipment base 1. A sliding base 12 is installed on the upper side of the base mounting plate 11, and an insulating base plate 13 and an insulating connector 131 are installed on the upper side of the sliding base. The mounting base plate 2 is installed on the upper side of the insulating base plate 13 and is used to install other components.
[0057] The sliding base 12 includes a sliding base plate 121 and a slider 122 fixedly connected to the lower side of the sliding base plate 121. Slide rails 123, which cooperate with the slider 122, are symmetrically arranged on both sides of the base mounting plate 11 near the edge. A servo transmission mechanism 124 is mounted on the side of the equipment base 1 away from the projection welding mechanism 3. In this embodiment, the servo transmission mechanism 124 is preferably a motor screw with relatively stable transmission capability. The sliding base and the components above it are driven by the servo transmission mechanism 124, thereby moving it closer to or away from the projection welding mechanism 3, thus aligning the welding position of the frame with the welding gun position of the projection welding mechanism 3.
[0058] A limit sensing probe 14 is provided on the upper side of the equipment base 1 near the projection welding mechanism 3. The limit sensing probe 14 can emit a detection laser to sense the position of the sliding base plate 121. A laser receiving plate 141 is fixedly connected to the upper side of the sliding base plate 121 near the projection welding mechanism 3. The laser receiving plate 141 is used to cooperate with the limit sensing probe 14 and receive the laser from the limit sensing probe 14.
[0059] Reference Figure 5 and Figure 6 The insulating base plate 13 is located between the sliding base plate 121 and the mounting base plate 2. In this embodiment, there are multiple insulating connectors 131, all of which are made of insulating material. Each insulating connector 131 is distributed and fixedly connected between the insulating base plate 13 and the sliding base plate 121, thereby constructing an insulating isolation strip under the insulating base plate 13. This allows the welding current to be strictly limited within the predetermined current loop formed by the projection welding mechanism 3, the frame, and the nut or other welded parts, preventing the current from being diverted to non-welded components such as the servo drive mechanism 124.
[0060] Reference Figure 6 and Figure 7 An insulating base plate 13 has multiple connecting posts 21 distributed on its upper side for fixing and connecting to the mounting base plate 2. A flexible clamping fixture 4 is mounted on the mounting base plate 2. The flexible clamping fixture 4 includes a flexible support assembly 41, a pneumatic pressure block 42, and connecting corner pieces 43. The flexible support assembly 41 provides flexible support for the frame body. The pneumatic pressure block 42 is driven by a cylinder to cooperate with the flexible support assembly 41 and press against the upper side of the frame. The connecting corner pieces have right-angle structures for cooperating with the mounting base plate 2 and the cylinder, respectively. The connecting corner pieces 43 are fixedly connected to both the mounting base plate 2 and the cylinder of the pneumatic pressure block 42.
[0061] Reference Figure 7 and Figure 8 The flexible support component 41 includes an abutment end 411, a mounting bracket 412, and a floating member 413. In this embodiment, the floating member 413 is preferably a spring with strong elastic deformation capability. The mounting bracket 412 is fixedly connected to the upper side of the mounting base plate 2. The mounting bracket 412 has a columnar groove 4121 at the position below the pneumatic pressure block 42 for mounting the floating member 413 and the abutment end 411. The abutment end 411 is coaxially arranged at the lower part and integrally connected to a sliding rod 4111 for cooperating with the floating member 413. The floating member 413 is sleeved on the outside of the sliding rod, and the end of the floating member 413 abuts against the lower side of the abutment end 411. The mounting bracket 412 has a through hole 4122 for the sliding rod to pass through. The through hole 4122 is coaxially formed and interconnected with the columnar groove 4121. The diameter of the through hole 4122 is smaller than the outer diameter of the floating member 413 to limit the floating member 413. The mounting base plate 2 has a reserved through hole 22 at the corresponding position of the through hole 4122 for the sliding rod 4111 to pass through.
[0062] Reference Figure 5 The mounting base plate 2 is provided with a tapered positioning end 23 for passing through pre-drilled holes in the frame and a three-way adjustment assembly 24 for installing and adjusting the tapered positioning end 23. Combined with... Figure 9 and Figure 10 The three-way adjustment assembly 24 includes an adjustment corner block 241, a mounting corner block 242, an intermediate connecting block 243, a first spacer block 244, a second spacer block 245, and a positioning pin 246.
[0063] The adjusting corner block 241 has a first strip-shaped connecting block 2411 and a second strip-shaped connecting block 2412 that are perpendicular to each other. The first strip-shaped connecting block 2411 has multiple Z-direction pin grooves 24111 spaced apart for the positioning pins 246 to pass through and be fixed. The second strip-shaped connecting block 2412 has multiple X-direction pin grooves 24121 spaced apart for the positioning pins 246 to pass through and be fixed. The mounting corner block 242 has a third strip-shaped connecting block 2421 and a mounting block 2422 that are perpendicular to each other. The third strip-shaped connecting block 2421 has multiple Y-direction pin grooves 24211 spaced apart for the positioning pins 246 to pass through and be fixed. The mounting block 2422 has a vertically formed mounting through hole for the conical positioning end 23 to pass through and be fixedly connected. Both the first spacer block 244 and the second spacer block 245 have multiple U-shaped adjusting grooves 2441 arranged at equal intervals. The intermediate connecting block 243 has mating pin grooves 2431 on its two perpendicular sides, which are respectively provided to cooperate with each U-shaped adjustment groove 2441 and to allow the positioning pins 246 to pass through. The mating pin grooves 2431 are respectively opened along the x and y directions of the intermediate connecting block 243.
[0064] The first strip-shaped connecting block 2411 of the adjusting corner block 241 is fixedly connected to the mounting base plate 2 via a positioning pin 246, and the position of the tapered positioning end 23 in the z-direction is adjusted by the positioning pin 246 passing through different z-direction pin grooves; the second strip-shaped connecting block 2412 is fixedly connected to the intermediate connecting block 243 via a positioning pin 246, and the position of the tapered positioning end 23 in the x-direction is adjusted by the positioning pin 246 passing through different x-direction pin grooves; the third strip-shaped connecting block 2421 of the mounting corner block 242 is fixedly connected to the intermediate connecting block 243 via a positioning pin 246. The connecting block 243 is fixedly connected, and the position of the conical positioning end 23 in the y direction is adjusted by the positioning pin 246 passing through different y-direction pin grooves; the first spacer block 244 and the second spacer block 245 are both fixedly connected to the intermediate connecting block 243 by the positioning pin 246. The positioning pin 246 passes through different U-shaped adjustment grooves 2441 and the corresponding mating pin grooves 2431 of the intermediate connecting block 243 to make fine adjustments to the conical positioning end 23 in the x and y planes, thereby achieving precise adjustment of the position of the conical positioning end 23 on the mounting base plate 2.
[0065] The implementation principle of a flexible automatic projection welding integrated workstation according to an embodiment of this application is as follows: Nut feeding fixture 5 uses a vibratory feeder 51 to screen and sort nuts, ensuring they are discharged individually. Guide tube 52, under the adjustment of the first adjusting frame 53, ensures the stability of the material conveying channel and receives the nuts. In the automatic feeding fixture 6, the receiving guide seat 61 receives the nuts, and the movable baffle 613 temporarily limits the nuts. The sleeve assembly 62, with the help of the inner rod 622, pushes the nuts to the welding position, and the second adjusting frame 63 adjusts their position.
[0066] Driven by the servo transmission mechanism 124, the sliding base 12 on the equipment base 1, relying on the cooperation of the slider 122 and the slide rail 123, can move the upper component closer to or away from the projection welding mechanism 3, and accurately position it by cooperating with the limit sensing probe 14 and the laser receiving plate 141. The insulating base plate 13 and the insulating connector 131 form an insulating isolation zone to limit the welding current loop.
[0067] The flexible support component 41 of the flexible fixture tooling 4 flexibly supports the frame with the floating part 413 and other structures, and the pneumatic pressure block 42 cooperates to press it. The conical positioning end 23 on the mounting base plate 2 achieves multi-directional precise adjustment through the three-way adjustment component 24 to determine the position of the frame. All components work together to achieve precise positioning of the frame, efficient material feeding and high-quality projection welding, thereby improving welding efficiency and quality.
[0068] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.
Claims
1. A flexible automatic projection welding integrated workstation, characterized in that: The equipment includes a base (1), a mounting base plate (2) disposed on the base (1), a projection welding mechanism (3) disposed on one side of the mounting base plate (2) and used for welding operations, a flexible clamping fixture (4) disposed on the mounting base plate (2) and used for fixing the frame, a nut feeding fixture (5) for holding a number of nuts, and an automatic feeding fixture (6) for transferring the nuts from the nut feeding fixture (5) to the welding point. The automatic feeding fixture (6) is disposed on one side of the projection welding mechanism (3).
2. The flexible automatic projection welding integrated workstation according to claim 1, characterized in that: The nut feeding fixture (5) includes a vibratory plate (51), a guide square tube (52), and a first adjustment frame (53) disposed on the vibratory plate (51) and used to adjust the position of the guide square tube (52). The vibratory plate (51) has a discharge port for discharging a single nut to be welded, and the inlet of the guide square tube (52) is aligned with the position of the discharge port. The first adjustment frame (53) includes a first L-shaped connecting rod (531), a first lifting adjustment seat (532) fixedly connected to the base of the vibrating plate (51), and a first horizontal adjustment seat (533) for fixed connection with the guide square tube (52). The first L-shaped connecting rod (531) has an integrally connected vertical part and a horizontal part. The vertical part is slidably installed on the first lifting adjustment seat (532), and the first horizontal adjustment seat (533) is slidably installed on the horizontal part.
3. The flexible automatic projection welding integrated workstation according to claim 2, characterized in that: The automatic feeding fixture (6) includes a receiving guide seat (61) for receiving nuts in the guide square tube (52), a push sleeve assembly (62) for pushing the nuts in the receiving guide seat (61) to the welding station, and a second adjustment frame (63) for installing and adjusting the position of the push sleeve assembly (62). The push sleeve assembly (62) includes an outer cylinder (621) and an inner rod (622). The receiving guide seat (61) is installed at the end of the outer cylinder (621) near the projection welding mechanism (3). A movable baffle (613) for blocking the nut is movably connected to the receiving guide seat (61).
4. The flexible automatic projection welding integrated workstation according to claim 1, characterized in that: The flexible clamping fixture (4) includes a flexible support assembly (41) disposed on the mounting base plate (2) and used to support the vehicle frame, a pneumatic pressure block (42) disposed on the mounting base plate (2) and cooperating with the flexible support assembly (41), and a connecting corner piece (43) for mounting the pneumatic pressure block (42). The connecting corner piece (43) has a right-angle structure for cooperating with the mounting base plate (2) and the cylinder respectively. The connecting corner piece (43) is fixedly connected to both the mounting base plate (2) and the cylinder of the pneumatic pressure block (42). The flexible support assembly (41) includes an abutment end (411) for the underside of the frame to abut, and the underside of the pneumatic pressure block (42) is directly opposite the abutment end (411).
5. The flexible automatic projection welding integrated workstation according to claim 4, characterized in that: The flexible support assembly (41) further includes a mounting bracket (412) fixedly connected to the mounting base plate (2), and a floating member (413) disposed within the mounting bracket (412). The mounting bracket (412) has a columnar groove (4121) at the corresponding position of the pneumatic pressure block (42) for mounting the floating member (413) and the abutment end (411). The abutment end (411) has a sliding rod (4111) integrally connected to its lower part for cooperating with the floating member (413). The floating member (413) is sleeved on the sliding rod. The outside of the sliding rod and the end of the floating member (413) abut against the lower side of the abutting end (411). The mounting angle seat (412) is provided with a through hole (4122) for the sliding rod (4111) to pass through. The through hole (4122) and the columnar groove (4121) are coaxially opened and interconnected. The diameter of the through hole (4122) is smaller than the outer diameter of the floating member (413). The mounting base plate (2) is provided with a reserved through hole (22) at the corresponding position of the through hole (4122) for the sliding rod (4111) to pass through.
6. The flexible automatic projection welding integrated workstation according to claim 1, characterized in that: The mounting base plate (2) is also provided with a tapered positioning end (23) for passing through a pre-drilled hole on the frame and a three-way adjustment assembly (24) for installing and adjusting the tapered positioning end (23). The three-way adjustment assembly (24) includes an adjustment corner block (241), a mounting corner block (242), an intermediate connecting block (243), a first spacer block (244), a second spacer block (245), and a positioning pin (246). The adjusting corner block (241) has a first strip-shaped connecting block (2411) and a second strip-shaped connecting block (2412) that are perpendicular to each other. The first strip-shaped connecting block (2411) has a plurality of Z-direction pin grooves (24111) spaced apart for the positioning pin (246) to pass through and be fixed. The second strip-shaped connecting block (2412) has a plurality of X-direction pin grooves (24121) spaced apart for the positioning pin (246) to pass through and be fixed. The mounting corner block (242) has a third strip-shaped connecting block (2421) and a mounting block (2422) arranged perpendicularly to each other. The third strip-shaped connecting block (2421) has a plurality of Y-direction pin grooves (24211) spaced apart for the positioning pin (246) to pass through and be fixed. The mounting block (2422) has a vertical mounting through hole for the tapered positioning end (23) to pass through and be fixedly connected. The first spacer block (244) and the second spacer block (245) are each provided with a plurality of U-shaped adjustment grooves (2441) arranged at equal intervals. The intermediate connecting block (243) is provided with mating pin grooves (2431) on its mutually perpendicular sides, which cooperate with each of the U-shaped adjustment grooves (2441) and allow the positioning pins (246) to pass through.
7. The flexible automatic projection welding integrated workstation according to claim 1, characterized in that: The mounting base plate (2) is provided with a nut leak prevention detection component, which includes a laser detection probe and a lifting drive cylinder installed on the mounting base plate (2) for adjusting the position of the laser detection probe.
8. The flexible automatic projection welding integrated workstation according to claim 1, characterized in that: The equipment base (1) is provided with a sliding base (12) on the top, which cooperates with the mounting base plate (2). The two sides of the equipment base (1) are provided with slide rails (123) that cooperate with the sliding base (12) near the edge. The sliding base (12) includes a sliding base plate (121) and a slider (122) fixedly connected to the lower side of the sliding base plate (121) and used to cooperate with the slide rail (123). The equipment base (1) is provided with a servo transmission mechanism (124) that drives the sliding base (12) to move closer to / away from the projection welding mechanism (3).
9. A flexible automatic projection welding integrated workstation according to claim 8, characterized in that: The upper side of the equipment base (1) near the projection welding mechanism (3) is provided with a limiting sensor probe (14) for sensing the position of the sliding base plate (121), and the upper side of the sliding base plate (121) near the projection welding mechanism (3) is provided with a laser receiving plate (141) for cooperating with the limiting sensor probe (14).
10. A flexible automatic projection welding integrated workstation according to claim 8, characterized in that: An insulating base plate (13) is provided between the sliding base plate (121) and the mounting base plate (2). The insulating base plate (13) has multiple insulating connectors (131) on its lower side. Each insulating connector (131) is fixedly connected between the insulating base plate (13) and the sliding base plate (121). The insulating base plate (13) has multiple connecting posts (21) for fixing and connecting the mounting base plate (2) distributed on its upper side.