Hardware welding tool based on multi-point positioning locking mechanism and multi-point positioning technology of hardware welding tool

Abstract

The invention relates to the technical field of hardware welding, and discloses a hardware welding tool based on a multi-point positioning locking mechanism and a multi-point positioning technology thereof.The hardware welding tool comprises a supporting part, the supporting part comprises a base, and a driving mechanism and a rotating part are installed on the base; the rotary part comprises an annular frame and a clamping part which are rotationally mounted on the base and connected with the driving mechanism, a plurality of mounting grooves are uniformly formed in the annular frame in the circumferential direction, and base plates used for placing hardware are rotationally mounted in the mounting grooves; a locking mechanism used for positioning and clamping the hardware and enabling the welded hardware to be automatically discharged from the base plate is connected to the base plate. According to the hardware welding tool based on the multi-point positioning locking mechanism and the multi-point positioning technology of the hardware welding tool, the problems that in the prior art, when hardware composed of a base plate and channel steel is welded, due to insufficient pressing between the channel steel and the base plate, attaching is not tight enough, positioning deviation is caused, welding is not tight enough, and the production efficiency is low can be effectively solved.

Description

Technical Field

[0001] The present invention relates to the technical field of hardware welding, and particularly relates to a hardware welding tooling based on a multi-point positioning and locking mechanism and its multi-point positioning process. Background Art

[0002] In the field of hardware manufacturing, there is a kind of hardware part composed of a base plate and channel steel, which is widely used in different fields such as photovoltaic energy (base of photovoltaic bracket), building structure (connector of curtain wall support frame), mechanical equipment (fixing seat of machine tool guardrail), and household facilities (support seat of balcony clothes hanger).

[0003] At the present stage, when welding such hardware parts, the conventional process is that workers place the base plate and channel steel on a simple fixture and then weld the connection part between the two. This operation method has many drawbacks:

[0004] On the one hand, from the perspective of the tightness of fitting and the positioning accuracy, since the simple fixture usually can only provide limited clamping force, sometimes the channel steel and the base plate are not pressed enough, resulting in insufficient tightness of fitting. This not only affects the welding quality but may also cause various problems due to component loosening in subsequent use. Moreover, the positioning accuracy between the two is insufficient, and the relative position may deviate, thus affecting the subsequent processing procedures and the assembly and use performance of the final product. On the other hand, a series of steps such as manual handling, visual positioning, and single-sided multi-point simple clamping are numerous and cumbersome, and the production efficiency is not high. Summary of the Invention

[0005] Aiming at the above-mentioned drawbacks of the prior art, the present invention provides a hardware welding tooling based on a multi-point positioning and locking mechanism and its multi-point positioning process, which can effectively solve the problems in the prior art that when welding a hardware part composed of a base plate and channel steel, due to insufficient pressing between the channel steel and the base plate, the fitting is not tight enough, resulting in positioning deviation, insufficient welding tightness, and low production efficiency.

[0006] To achieve the above object, the present invention is realized through the following technical solutions:

[0007] A hardware welding tooling based on a multi-point positioning and locking mechanism, comprising:

[0008] A support part, the support part includes a base, and a driving mechanism is installed on the base;

[0009] A rotating part, the rotating part includes an annular frame rotatably installed on the base and connected to the driving mechanism;

[0010] A clamping part, a plurality of installation grooves are evenly arranged along the circumferential direction on the annular frame, and a backing plate for placing the hardware part is rotatably installed in each installation groove. A locking mechanism for positioning, clamping the hardware part and automatically discharging the welded hardware part from the backing plate is connected to the backing plate;

[0011] Among them, loading points, welding points and unloading points are circumferentially and spacedly distributed on the upper end surface of the base, and respectively correspond to three specific stopping positions during the rotation of the annular frame. A welding arm is arranged outside the base and corresponding to the welding point. Pushing mechanisms that cooperate with the locking mechanism are connected to the positions corresponding to the loading point, welding point and unloading point of the base.

[0012] Among them, when the annular frame is stationary, it will receive hardware at the loading point, perform welding operations at the welding point, and complete the unloading of finished products at the unloading point. The annular frame rotates intermittently driven by the driving mechanism to make the above process cycle.

[0013] Furthermore, the driving mechanism includes an external gear ring. The external gear ring is fixedly sleeved on the lower end of the annular frame. A transmission gear is meshed outside the external gear ring. The transmission gear is rotationally connected to the base through a coupling shaft. The lower end of the coupling shaft is fixedly connected to the driving shaft of the servo motor.

[0014] Furthermore, the locking mechanism includes a spring seat. The spring seat is fixedly connected to the upper end surface of the backing plate through a magnetic cushion block. An inner clamping component is fixedly connected to the fixed section of the spring seat through a connecting sleeve and a connecting rod pointing to the outside of the annular frame. The top of the movable section of the spring seat is fixedly connected with a pressing piece for pressing the channel steel to fit with the base plate. A centering and positioning component is also installed on the backing plate.

[0015] Furthermore, the inner clamping component includes a mounting seat. The mounting seat is fixedly connected with the connecting rod. One end of the mounting seat pointing to the outside of the annular frame is fixedly connected with a positioning block through a short rod. The positioning block adopts a magnetic design. Two round rods are symmetrically and rotationally installed on the mounting seat. Column-shaped rubber blocks I are symmetrically and eccentrically sleeved on the round rods. Strip-shaped grooves are arranged on the circumferential outer surface of the column-shaped rubber blocks I to increase their friction force.

[0016] Furthermore, a column-shaped sheave I is also fixedly sleeved on the round rod. An inclined groove is arranged on the circumferential outer surface of the column-shaped sheave I and close to the mounting seat. A pressing rod is slidably and penetratingly connected to the mounting seat. An annular block I that is slidably connected to the mounting seat is fixedly sleeved on the pressing rod at a position inside the mounting seat. Two guide blocks that are slidably connected to two inclined grooves are symmetrically fixedly connected to the annular block I. The upper end of the pressing rod is fixedly connected with the pressing piece.

[0017] Furthermore, the centering and positioning component includes column-shaped rubber blocks II. The column-shaped rubber blocks II are symmetrically and rotationally connected to the backing plate through vertical rods that are eccentrically fixedly connected to them. The lower ends of the vertical rods are fixedly connected with column-shaped sheaves II. Inclined grooves are also penetrated in the column-shaped sheaves II. An annular block II is slidably connected inside the column-shaped sheave. Guide blocks are also fixedly connected to the annular block II. The guide blocks are slidably connected to the inclined grooves of the column-shaped sheave II.

[0018] Further, a connecting rod is fixedly connected to the lower end of the second annular block. The lower end of the connecting rod slidably penetrates through the second cylindrical grooved pulley and is fixedly connected to a resisting rod. The lower end surface of the backing plate is rotatably connected to a linkage member through a connecting plate. The inner side wall of the annular frame is fixedly connected to an annular limiting ring through a cross bar. The linkage member is slidably connected to both the resisting rod and the annular limiting ring. A guiding groove for preventing interference with the connecting rod is also formed through the linkage member.

[0019] Further, the pressing mechanism includes a support platform, which is fixedly connected to the base. A cylinder is fixedly installed on the support platform and the base at the welding point and the unloading point. The piston rod of the cylinder penetrates through the support platform and is fixedly connected to a lifting rod. The upper end of the lifting rod is fixedly connected to a pressing plate. An annular connecting block is fixedly sleeved on the lifting rod. The upper end of the support platform is fixedly connected to a mounting frame. Pressing seats are slidably connected up and down on the mounting frame at the welding point and the unloading point. A pressing spring is connected between the pressing seat and the annular connecting block. The ends of the pressing member and the backing plate pointing to the inner side of the annular frame are respectively fixedly connected to tongue plates that cooperate with the pressing plate and the pressing seat.

[0020] Further, the locking mechanism further includes a support ring, which is arranged on the outside of the annular frame and is fixedly connected to the base. A notch is formed on the upper end surface of the support ring at the unloading point. A limiting ring is fixedly connected to the horizontal section on the inner side of the annular frame to prevent the backing plate from deflecting inwards excessively.

[0021] A multi-point positioning process for a hardware welding tooling based on a multi-point positioning locking mechanism includes the following steps:

[0022] S1. Loading preparation: When the annular frame stops at the loading point, the worker places the base plate and the channel steel on the backing plate.

[0023] S2. Preliminary positioning at the loading point: The pressing mechanism at the loading point operates to tilt the backing plate, and by means of gravity, the base plate and the channel steel slide and are preliminarily fixed by magnetism.

[0024] S3. Precise positioning at the welding point: The pressing mechanism at the welding point operates to push the base plate and the channel steel to the center of the backing plate and lock them respectively to ensure that the two are closely attached.

[0025] S4. Welding and resetting: After positioning, welding is carried out. After welding is completed, the pressing mechanism resets to release the locking of the base plate and the channel steel.

[0026] S5. Unloading: The welded hardware parts rotate with the annular frame to the unloading point. The pressing mechanism tilts the backing plate, and the hardware parts fall into the storage container by gravity.

[0027] The technical solution provided by the present invention has the following beneficial effects compared with the prior art:

[0028] 1. By providing a support part, a rotating part and a clamping part, the annular frame rotates intermittently driven by a driving mechanism, realizing the cycle of feeding, welding and unloading processes, reducing manual operation steps, and making the whole welding process more automated and efficient.

[0029] 2. At the welding point, the pressing mechanism drives the backing plate to rotate, and the centering positioning component and the inner clamping component in the locking mechanism work together. First, the base plate is moved to the center position of the backing plate and locked, and then the channel steel is moved to the center position on the base plate and locked, realizing the precise adjustment of the relative positions of the two, greatly improving the positioning accuracy, and avoiding affecting subsequent processing procedures and the assembly and use performance of the product due to positioning deviation. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention, and those of ordinary skill in the art can also obtain other drawings based on these drawings without creative efforts.

[0031] Figure 1 It is the multi-point positioning process flow chart of a hardware welding tooling based on a multi-point positioning locking mechanism in the present invention;

[0032] Figure 2 It is the structural schematic diagram of a hardware welding tooling based on a multi-point positioning locking mechanism in the present invention;

[0033] Figure 3 It is the structural schematic diagram of the support part 、 rotating part and clamping part in a hardware welding tooling based on a multi-point positioning locking mechanism in the present invention;

[0034] Figure 4 It is the structural schematic diagram of the driving mechanism in a hardware welding tooling based on a multi-point positioning locking mechanism in the present invention;

[0035] Figure 5 It is the schematic diagram of partial structures of the support part, annular frame, locking mechanism and pressing mechanism in a hardware welding tooling based on a multi-point positioning locking mechanism in the present invention;

[0036] Figure 6 For the present invention Figure 5 The partial enlarged view at M;

[0037] Figure 7 It is the structural schematic diagram of the backing plate and the locking mechanism in a hardware welding tooling based on a multi-point positioning locking mechanism in the present invention;

[0038] Figure 8Exploded view of the inner clamping component in a hardware welding tooling based on a multi-point positioning and locking mechanism according to the present invention;

[0039] Figure 9 Schematic structural diagram of the support platform and the pushing mechanism in a hardware welding tooling based on a multi-point positioning and locking mechanism according to the present invention;

[0040] Figure 10 Schematic structural diagram of the hardware part which is the object of action of the present invention.

[0041] The reference numerals in the figure respectively represent: 1, support part; 11, base; 12, driving mechanism; 121, external gear ring; 122, transmission gear; 123, servo motor; 2, rotating part; 21, annular frame; 3, clamping part; 31, backing plate; 32, locking mechanism; 321, spring seat; 322, magnetic cushion block; 323, inner clamping component; 3231, mounting seat; 3232, positioning block; 3233, round rod; 3234, cylindrical rubber block I; 3235, cylindrical grooved pulley I; 3236, pressing rod; 3237, annular block I; 3238, guide block; 324, pressing member; 325, centering and positioning component; 3251, cylindrical rubber block II; 3252, cylindrical grooved pulley II; 3253, abutting rod; 3254, linkage member; 3255, annular limiting ring; 33, pushing mechanism; 331, support platform; 332, cylinder; 333, lifting rod; 334, pressing plate; 335, annular connecting block; 336, mounting frame; 337, pressing seat; 338, pressing spring; 339, tongue plate; 34, support ring; 35, limiting ring; 4, welding arm; a, loading point; b, welding point; c, unloading point. Detailed implementation manners

[0042] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0043] The present invention will be further described below with reference to the embodiments.

[0044] Embodiment:

[0045] Please refer to Figures 2 - 10 , the present invention provides a technical solution: a hardware welding tooling based on a multi-point positioning and locking mechanism, including:

[0046] Support part 1, the support part 1 includes a base 11, and a driving mechanism 12 is installed on the base 11.

[0047] A rotating part 2, the rotating part 2 includes an annular frame 21 rotatably mounted on a base 11, connected to a driving mechanism 12, and intermittently rotated under the drive of the driving mechanism 12.

[0048] A clamping part 3, a plurality of mounting grooves are evenly arranged in the circumferential direction on the annular frame 21, a backing plate 31 for placing hardware is rotatably mounted in each mounting groove, and a locking mechanism 32 for positioning, clamping the hardware and automatically discharging the welded hardware from the backing plate 31 is connected to the backing plate 31.

[0049] Among them, on the bearing plane of the base 11, a loading point a, a welding point b and a discharging point c are circumferentially spaced apart, and respectively correspond to three specific stopping positions during the rotation of the annular frame 21. A welding arm 4 is arranged outside the base 11 and corresponding to the welding point b, and a pressing mechanism 33 cooperating with the locking mechanism 32 is connected at positions on the base 11 corresponding to the loading point a, the welding point b and the discharging point c.

[0050] Among them, when the annular frame 21 is stationary, it will receive the hardware at the loading point a, perform welding operations at the welding point b, and complete the discharging of the finished product at the discharging point c. The annular frame 21 rotates intermittently under the drive of the driving mechanism 12, so that the processes of loading, welding and discharging are carried out in a cycle.

[0051] During specific operation, when the annular frame 21 is stationary at intervals, workers place the base plate and the channel steel at the loading point a on the backing plate 31 staying at the loading point a. The pressing mechanism 33 at the loading point a operates to make the end of the backing plate 31 pointing to the center of the annular frame 21 tilt downward, so that the base plate and the channel steel slide from high to low on the backing plate 31 under their own gravity and are adsorbed on the locking mechanism 32 to achieve preliminary positioning. Then, as the driving mechanism 12 operates, it will intermittently convey through the annular frame 21 to the welding point b. After reaching the welding point b, the pressing mechanism 33 at the welding point b operates, first drives the backing plate 31 to rotate, so that the end of it pointing to the inner side of the annular frame 21 tilts downward, and then drives the locking mechanism 32 to first move the base plate to the center position on the backing plate 31 and lock it, and then move the channel steel to the center position on the base plate and lock it, so as to achieve precise adjustment of their relative positions. Then, the connection between the two is welded by the welding arm 4.

[0052] After welding is completed, the pressing mechanism 33 at the welding point b resets, driving the backing plate 31 to reset to the horizontal state synchronously. Then, the driving mechanism 12 drives the annular frame 21 to continue to rotate, and further conveys the welded base plate and channel steel to the discharging point c. The pressing mechanism 33 at the discharging point c operates to drive the backing plate 31 to rotate, so that the end of it pointing to the outside of the annular frame 21 tilts downward, and then the welded hardware falls from the backing plate 31 into an external storage container.

[0053] The driving mechanism 12 includes an external gear ring 121 which is fixedly sleeved on the lower end of the annular frame 21. An external gear 122 is meshed with the outer side of the external gear ring 121. The external gear 122 is rotationally connected to the base 11 through a connecting shaft, and the lower end of the connecting shaft is fixedly connected to the driving shaft of the servo motor 123.

[0054] During specific operation, the driving shaft of the servo motor 123 rotates intermittently, drives the external gear 122 to rotate synchronously and intermittently through the connecting shaft, and then drives the external gear ring 121 to rotate synchronously and intermittently. The intermittent rotation of the external gear ring 121 drives the annular frame 21 to rotate synchronously and intermittently, thereby realizing the step-by-step conveyance of the substrate and the channel steel to be welded at the loading point a to the welding point b, and the conveyance of the hardware parts completed by welding at the welding point b to the unloading point c, and further realizing the rotary cyclic processing.

[0055] The locking mechanism 32 includes a spring seat 321 which is fixedly connected to the upper end surface of the backing plate 31 through a magnetic cushion block 322. An inner clamping assembly 323 is fixedly connected to the fixed section of the spring seat 321 through a connecting sleeve and a connecting rod pointing to the outside of the annular frame 21. The top end of the movable section of the spring seat 321 is fixedly connected with a pressing member 324 for pressing the channel steel to fit with the substrate. A centering positioning assembly 325 for centering and aligning the substrate on the backing plate 31 is further installed on the backing plate 31.

[0056] The inner clamping assembly 323 includes a mounting seat 3231 which is fixedly connected to the connecting rod. One end of the mounting seat 3231 pointing to the outside of the annular frame 21 is fixedly connected with a positioning block 3232 through a short rod. The positioning block 3232 adopts a magnetic design to prevent the channel steel from falling off the backing plate 31 due to centrifugal force during the rotation process. Two round rods 3233 are symmetrically and rotationally installed on the mounting seat 3231. Cylindrical rubber blocks 3234 are symmetrically and eccentrically sleeved on the round rods 3233. Strip-shaped grooves are formed on the circumferential outer surface of the cylindrical rubber blocks 3234 to increase their friction force. A cylindrical sheave 3235 is also fixedly sleeved on the round rods 3233. An inclined groove is formed on the circumferential outer surface of the cylindrical sheave 3235 and near the mounting seat 3231. A pressing rod 3236 is slidably and penetratingly connected to the mounting seat 3231. An annular block 3237 which is slidably connected to the mounting seat 3231 is fixedly sleeved on the pressing rod 3236 at the position inside the mounting seat 3231. Two guide blocks 3238 which are slidably connected to the two inclined grooves are symmetrically fixedly connected to the annular block 3237. The upper end of the pressing rod 3236 is fixedly connected with the pressing member 324.

[0057] In a state where no external force is applied, the movable section of the spring seat 321 is in an elastically compressed state, and the distance between the pressing member 324 and the backing plate 31 is greater than the height of the channel steel, reserving space for the placement of the backing plate 31 and the channel steel at the loading point a. At this time, the pressing rod 3236 is in a relatively upper position, and the two guide blocks 3238 connected thereto are also in relatively upper positions in the corresponding inclined slots. The two cylindrical rubber blocks 3234 also approach each other to facilitate the placement of the channel steel.

[0058] The centering and positioning assembly 325 includes cylindrical rubber blocks 3251. Two cylindrical rubber blocks 3251 are symmetrically and rotatably connected to the backing plate 31 through vertical rods eccentrically and fixedly connected thereto. A cylindrical sprocket 3252 is fixedly connected to the lower end of the vertical rod. An inclined slot is also formed through the cylindrical sprocket 3252. An annular block 3252 is slidably connected inside the cylindrical sprocket. A guide block 3238 is also fixedly connected to the annular block 3252. The guide block 3238 is slidably connected in the inclined slot of the cylindrical sprocket 3252. A connecting rod is fixedly connected to the lower end of the annular block 3252. The lower end of the connecting rod slidably passes through the cylindrical sprocket 3252 and is fixedly connected to a pressing rod 3253. A linkage 3254 is rotatably connected to the lower end surface of the backing plate 31 through a connecting plate. An annular limiting ring 3255 is fixedly connected to the inner side wall of the annular frame 21 through a cross bar. The linkage 3254 is slidably connected to both the pressing rod 3253 and the annular limiting ring 3255. A guide slot for preventing interference with the connecting rod is also formed through the linkage 3254.

[0059] In a state without external force, the backing plate 31 is in a horizontal state, and the linkage 3254 is also in a horizontal state under the action of the annular limiting ring 3255. The annular block 3252 is in a relatively upper position inside the cylindrical sprocket 3252, and correspondingly, the guide block 3238 connected to the annular block 3252 is also in a relatively upper position in the corresponding inclined slot. In this state, the corresponding two cylindrical rubber blocks 3251 are in a state of moving away from each other to facilitate the placement of the substrate on the backing plate 31.

[0060] The pressing mechanism 33 includes a support platform 331, which is fixedly connected to the base 11. A cylinder 332 is fixedly installed on the support platform 331 and the base 11 at the welding point b and the unloading point c. The piston rod of the cylinder 332 passes through the support platform 331 and is fixedly connected to a lifting rod 333. A pressing plate 334 is fixedly connected to the upper end of the lifting rod 333. An annular connecting block 335 is fixedly sleeved on the lifting rod 333. An installation frame 336 is fixedly connected to the upper end of the support platform 331. A pressing seat 337 is slidably connected up and down on the installation frame 336 at the welding point b and the unloading point c. The pressing seat 337 and the annular connecting block 335 are connected by a pressing spring 338. Tongue plates 339 that cooperate with the pressing plate 334 and the pressing seat 337 are respectively fixedly connected to the ends of the pressing member 324 and the backing plate 31 pointing to the inside of the annular frame 21.

[0061] Initially, the piston rod of the air cylinder 332 is in the extended state. The tongue plate 339 connected to the backing plate 31 is vertically misaligned with the upper and lower horizontal sections of the pressing seat 337 to avoid interference when the backing plate 31 and the tongue plate 339 rotate with the annular frame 21. The tongue plate 339 connected to the pressing member 324 is located below the pressing plate 334.

[0062] The locking mechanism 32 further includes a support ring 34. The support ring 34 is arranged on the outer side of the annular frame 21 and is fixedly connected to the base 11, and is used to keep the backing plate 31 horizontal during the rotation of the backing plate 31 with the annular frame 21. A notch is provided on the upper end surface of the support ring 34 at the unloading point c, so that one end of the backing plate 31 pointing to the outside of the annular frame 21 can deflect downward. A limiting ring 35 is fixedly connected to the horizontal section on the inner side of the annular frame 21 to prevent the backing plate 31 from deflecting inward excessively.

[0063] During specific operation, after the substrate and the channel steel are swung onto the backing plate 31 at the loading point a, the piston rod of the air cylinder 332 at the loading point a contracts, drives the tongue plate 339 connected to the backing plate 31 to tilt downward through the guide rod and the pressing seat 337, and then drives one end of the backing plate 31 pointing to the center of the annular frame 21 to tilt downward, so that the substrate and the channel steel tilt downward synchronously until they respectively contact the magnetic cushion block 322 and the positioning block 3232, and then the substrate and the channel steel are attracted by the magnetic force of the two to prevent the substrate and the channel steel from falling under the action of centrifugal force during the movement with the annular frame 21.

[0064] When the substrate and the channel steel placed on the backing plate 31 move to the welding point b with the annular frame 21 and the backing plate 31, they will stay briefly. When staying, the piston rod of the air cylinder 332 at the welding point b contracts, driving the lifting rod 333 to descend.

[0065] When the lifting rod 333 descends, it will drive the pressing seat 337 to descend synchronously through the annular connecting block 335 and the pressing spring 338, and then drive one end of the backing plate 31 pointing to the inner side of the annular frame 21 to deflect downward through the tongue plate 339, driving the cylindrical grooved pulley two 3252 to move downward synchronously. During this process, since one end of the linkage member 3254 is restricted by the annular limiting ring 3255, the distance between the other end of the linkage member 3254 and the backing plate 31 will increase, so it will drive the connecting rod and the annular block two to move downward through the abutting rod 3253, driving the guide block 3238 to slide relatively downward in the inclined groove of the cylindrical grooved pulley two 3252, and then driving the cylindrical grooved pulley two 3252 and the vertical rod to rotate synchronously. Since the cylindrical grooved pulley two 3252 and the vertical rod are eccentrically connected, the rotation of the vertical rod will drive the distance between the two cylindrical grooved pulleys two 3252 to decrease, thus pushing the substrate from both sides to move it to the middle position of the backing plate 31, so as to realize the centering positioning and locking of the substrate.

[0066] When the lifting rod 333 descends, it will also drive the tongue plate 339 connected to the pressing member 324 to descend synchronously, thereby driving the spring seat 321 to contract further. The contraction of the spring seat 321 will drive the pressing member 324 to move synchronously in the direction close to the backing plate 31. During the movement of the pressing member 324, it will drive the pressing rod 3236 to move downward relative to the mounting seat 3231, so as to slide downward through the annular block 3237 thereon, and then slide through the two guide blocks 3238 connected to the annular block 3237 in the corresponding inclined grooves, causing the cylindrical grooved pulley 3235 and the round rod 3233 to rotate. The rotation of the round rod 3233 will drive the cylindrical rubber block eccentrically connected thereto to rotate synchronously until it contacts the inner wall of the channel steel, so that the channel steel is centered on the substrate. At the same time, the rotation of the cylindrical rubber block will also apply a tangential frictional force pointing to the center of the annular frame 21 to the inner wall of the channel steel, driving the channel steel to abut against the positioning block 3232. When the pressing member 324 moves to contact the top end of the channel steel, it stops moving, thereby applying a downward pressing force to the channel steel to make it abut against the substrate at the lower end. After that, the connection between the substrate and the channel steel can be welded by an external robotic arm.

[0067] After welding is completed, the piston rod of the air cylinder 332 extends and resets, driving the backing plate 31 to reset to the horizontal state synchronously. During this process, the I-shaped member will reset to the horizontal state synchronously under the restriction of the annular limiting ring 3255, and then drive the two cylindrical rubber blocks 3251 to rotate and reset synchronously. And the pressing member 324 also moves upward and resets synchronously under the drive of the spring seat 321, thereby indirectly driving the two cylindrical rubber blocks 3234 to rotate and reset synchronously through the round rod 3233. During the rotation and reset process of the cylindrical rubber block 3234 and the cylindrical rubber block 3251, they will respectively apply tangential frictional forces pointing to the outside of the annular frame 21 to the channel steel and the substrate, so as to make the channel steel and the substrate overcome the magnetic force between them and the positioning block 3232 and the magnetic cushion block 322 and separate from them respectively, facilitating subsequent unloading.

[0068] The backing plate 31 carrying the welded hardware at the welding point b will continue to rotate with the annular frame 21 to the unloading point c. The piston rod of the air cylinder 332 corresponding to the unloading point c extends further, driving the tongue piece connected to the backing plate 31 to move upward synchronously through the lifting rod 333 and the pressing seat 337, so that one end of the backing plate 31 pointing to the outside of the annular frame 21 deflects downward. At this time, the hardware separated from the positioning block 3232 and the magnetic cushion block 322 will fall from the backing plate 31 into the external storage container under its own gravity.

[0069] It should be noted that the above-mentioned hardware welding tooling based on the multi-point positioning and locking mechanism has the following advantages:

[0070] Advantage 1. Improve positioning accuracy: In the prior art, the positioning accuracy of the simple fixture is insufficient, resulting in easy deviation of the relative positions of the channel steel and the substrate. In the present invention, at the welding point b, the pressing mechanism 33 drives the backing plate 31 to rotate, and the centering positioning component 325 and the inner clamping component 323 in the locking mechanism 32 work together. First, the substrate is moved to the center position of the backing plate 31 and locked, and then the channel steel is moved on the substrate to the center position and locked, realizing precise adjustment of the relative positions of the two, greatly improving the positioning accuracy, and avoiding affecting subsequent processing procedures and the assembly and use performance of the product due to positioning deviation.

[0071] Advantage 2. Improve production efficiency: Aiming at the problems of cumbersome operations and low production efficiency in the prior art, such as manual handling, visual positioning, and single-sided multi-point simple clamping, the present invention sets up the support part 1, the rotary part 2, and the clamping part 3. The annular frame 21 rotates intermittently under the drive of the drive mechanism 12, realizing the cycle of loading, welding, and unloading processes, reducing manual operation steps, and making the entire welding process more automated and efficient.

[0072] Advantage 3. Facilitate unloading: After welding is completed, during the process of the first cylindrical rubber block 3234 and the second cylindrical rubber block 3251 rotating and resetting, tangential frictional forces pointing to the outside of the annular frame 21 will be applied to the channel steel and the substrate respectively, enabling the channel steel and the substrate to overcome the magnetic forces with the positioning block 3232 and the magnetic cushion block 322 and separate from them respectively. The hardware parts fall from the backing plate 31 to the external storage container under their own gravity, facilitating subsequent unloading and improving the continuity of production.

[0073] Advantage 4. Enhance welding effect and stability: During the positioning process, the first cylindrical rubber block 3234 can not only push the channel steel to make it centered, but the increased frictional force on its circumferential outer surface strip-shaped groove can also apply a tangential frictional force pointing to the center of the annular frame 21 to the inner wall of the channel steel when pushing the channel steel, driving the channel steel to tightly abut against the positioning block 3232. When the second cylindrical rubber block 3251 centers the substrate, the frictional force is also used to make the substrate fit more tightly with the channel steel. During welding, this tight fit can reduce situations such as insufficient welding and welding detachment, and in subsequent use, it can effectively prevent failures caused by component loosening, improving the overall quality and stability of the product.

[0074] Please refer to Figure 1 , on the other hand, the present invention also provides a multi-point positioning process for a hardware welding tooling based on a multi-point positioning locking mechanism, which specifically includes the following steps:

[0075] S1. Loading preparation: When the annular frame 21 stops at the loading point a, the worker places the substrate and the channel steel on the backing plate 31;

[0076] S2. Preliminary positioning at the loading point a: The pressing mechanism 33 at the loading point a operates to tilt the backing plate 31, and by means of gravity, the substrate and the channel steel slide and are preliminarily fixed using magnetic force;

[0077] S3. Precise positioning of welding point b: The pushing mechanism 33 of welding point b operates to push the substrate and the channel steel to the center of the backing plate 31 respectively and lock them to ensure their close fit.

[0078] S4. Welding and resetting: After positioning, welding is carried out. After welding is completed, the pushing mechanism 33 resets to release the locking of the substrate and the channel steel.

[0079] S5. Unloading: The welded hardware parts are rotated to the unloading point c along with the annular frame 21, and the pushing mechanism 33 tilts the backing plate 31, and the hardware parts fall into the storage container by gravity.

[0080] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A hardware welding tool based on a multi-point positioning locking mechanism, characterized in that: include: A support portion (1), the support portion (1) comprising a base (11), and a driving mechanism (12) is mounted on the base (11); A rotating part (2), the rotating part (2) comprising an annular frame (21) rotatably mounted on a base (11) and connected to a driving mechanism (12); The clamping part (3) is provided with a plurality of installation grooves evenly arranged along the circumferential direction on the annular frame (21), and a backing plate (31) for placing hardware is rotatably installed in each of the installation grooves. The backing plate (31) is connected with a locking mechanism (32) for positioning and clamping the hardware and automatically unloading the welded hardware; The upper end surface of the base (11) is provided with a loading point (a), a welding point (b) and a discharging point (c) at intervals along the circumferential direction, which respectively correspond to three specific stop positions of the annular frame (21) during the rotation process; a welding arm (4) is provided at the outer side of the base (11) and at a position corresponding to the welding point (b); and a pushing mechanism (33) is connected to the positions corresponding to the loading point (a), the welding point (b) and the discharging point (c) of the base (11), which can be used to assist the locking mechanism (32) in completing the clamping and discharging actions; When the annular frame (21) is stationary, it receives hardware at the loading point (a), performs welding operations at the welding point (b), and completes finished product unloading at the unloading point (c). The annular frame (21) rotates intermittently under the drive of the driving mechanism (12), so that the loading, welding and unloading processes are cyclically performed.

2. According to claim 1, a hardware welding tool based on a multi-point positioning locking mechanism is characterized in that: The driving mechanism (12) comprises an outer gear ring (121), the outer gear ring (121) is fixedly sleeved on the lower end of the annular frame (21), a transmission gear (122) is meshed on the outer side of the outer gear ring (121), the transmission gear (122) is rotationally connected to the base (11) through a connecting shaft, and the lower end of the connecting shaft is fixedly connected to the driving shaft of the servo motor (123).

3. The hardware welding tool based on the multi-point positioning locking mechanism according to claim 1 is characterized in that: The locking mechanism (32) comprises a spring seat (321), wherein the spring seat (321) is fixedly connected to the upper end surface of the backing plate (31) via a magnetic pad (322), an inner clamping assembly (323) is fixedly connected to the fixed section of the spring seat (321) via a connecting sleeve and a connecting rod pointing to the outside of the annular frame (21), a pressing piece (324) for pressing the channel steel to make it fit with the base plate is fixedly connected to the top of the movable section of the spring seat (321), and a centering positioning assembly (325) is also installed on the backing plate (31).

4. The hardware welding tool based on the multi-point positioning locking mechanism according to claim 3 is characterized in that: The inner clamping assembly (323) comprises a mounting seat (3231), wherein the mounting seat (3231) is fixedly connected to a connecting rod, and one end of the mounting seat (3231) pointing to the outside of the annular frame (21) is fixedly connected to a positioning block (3232) via a short rod, wherein the positioning block (3232) is designed to be magnetic, and two round rods (3233) are symmetrically rotatably mounted on the mounting seat (3231), and a cylindrical rubber block (3234) is symmetrically fixed and eccentrically sleeved on the round rod (3233), and a strip groove is provided on the circumferential outer surface of the cylindrical rubber block (3234) to increase its friction force.

5. The hardware welding tool based on the multi-point positioning locking mechanism according to claim 4 is characterized in that: The round rod (3233) is also fixedly provided with a cylindrical groove wheel (3235), and an oblique groove is provided on the circumferential outer surface of the cylindrical groove wheel (3235) near the mounting seat (3231). A pressing rod (3236) is slidably connected to the mounting seat (3231). An annular block (3237) slidably connected to the mounting seat (3231) is fixedly provided on the pressing rod (3236) and located inside the mounting seat (3231). Two guide blocks (3238) slidably connected in two oblique grooves are symmetrically fixedly connected to the annular block (3237), and the upper end of the pressing rod (3236) is fixedly connected to the pressing piece (324).

6. The hardware welding tool based on the multi-point positioning locking mechanism according to claim 5 is characterized in that: The centering positioning assembly (325) comprises two cylindrical rubber blocks (3251), and two cylindrical rubber blocks (3251) are symmetrically rotatably connected on the pad (31) through a vertical rod eccentrically fixedly connected thereto, and the lower end of the vertical rod is fixedly connected to a cylindrical groove wheel (3252), and the cylindrical groove wheel (3252) is also provided with an inclined groove, and an annular block (3238) is slidably connected inside the cylindrical groove wheel, and the annular block (3238) is also fixedly connected to the guide block (3238), and the guide block (3238) is slidably connected in the inclined groove of the cylindrical groove wheel (3252).

7. The hardware welding tool based on the multi-point positioning locking mechanism according to claim 6 is characterized in that: The lower end of the annular block 2 is fixedly connected with a connecting rod, the lower end of the connecting rod slides through the cylindrical groove wheel 2 (3252) and is fixedly connected with a push rod (3253), the lower end surface of the pad (31) is rotatably connected with a connecting piece (3254) through a connecting plate, the inner side wall of the annular frame (21) is fixedly connected with an annular limit ring (3255) through a cross bar, the connecting piece (3254) is slidably connected with the push rod (3253) and the annular limit ring (3255), and a guide groove is also opened on the connecting piece (3254) to prevent interference with the connecting rod.

8. The hardware welding tool based on the multi-point positioning locking mechanism according to claim 3 is characterized in that: The pushing mechanism (33) comprises a support platform (331), the support platform (331) is fixedly connected to the base (11), a cylinder (332) is fixedly installed on the support platform (331) and the base (11) at a welding point (b) and a discharge point (c), a piston rod of the cylinder (332) passes through the support platform (331) and is fixedly connected to a lifting rod (333), a pressing plate (334) is fixedly connected to the upper end of the lifting rod (333), and an annular connecting block (335) is fixedly sleeved on the lifting rod (333). ), a mounting frame (336) is fixedly connected to the upper end of the support (331), a pressing seat (337) is slidably connected to the mounting frame (336) at the welding point (b) and the unloading point (c), the pressing seat (337) and the annular connecting block (335) are connected via a pressing spring (338), and the pressing member (324) and the end of the pad (31) pointing to the inner side of the annular frame (21) are respectively fixedly connected with a tongue plate (339) matching the pressing plate (334) and the pressing seat (337).

9. The hardware welding tool based on the multi-point positioning locking mechanism according to claim 3 is characterized in that: The locking mechanism (32) further comprises a support ring (34), which is arranged on the outer side of the annular frame (21) and is fixedly connected to the base (11), and a notch is provided on the upper end surface of the support ring (34) at the discharge point (c), and a limit ring (35) is fixedly connected to the annular frame (21) on a horizontal section located on the inner side thereof, so as to prevent the pad (31) from excessively deflecting inwards.

10. The multi-point positioning process of a hardware welding tool based on a multi-point positioning locking mechanism according to claim 1, characterized in that: The following steps are involved: S1. Loading preparation: When the ring frame (21) stops at the loading point (a), the worker places the base plate and the channel steel on the pad (31); S2. Preliminary positioning of the loading point (a): The pushing mechanism (33) of the loading point (a) operates to tilt the pad (31), and the base plate and the channel steel slide with the help of gravity, and are initially fixed by magnetic force; S3, accurate positioning of welding point (b): the pushing mechanism (33) of welding point (b) operates to push the base plate and the channel steel to the center of the backing plate (31) and lock them to ensure that the two fit tightly; S4, welding and resetting: welding is performed after positioning is completed, and the pushing mechanism (33) is reset after welding is completed to release the locking of the base plate and the channel steel; S5, unloading: the welded hardware is transferred to the unloading point (c) along with the annular frame (21), the pushing mechanism (33) tilts the pad (31), and the hardware falls into the storage container by gravity.

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