Hardware welding fixture based on multi-point positioning locking mechanism and its multi-point positioning process

Abstract

The present invention relates to the field of hardware welding technology and discloses a hardware welding tool based on a multi-point positioning locking mechanism and a multi-point positioning process thereof. The hardware welding tool comprises a support portion, the support portion comprising a base, a drive mechanism mounted on the base, a rotating portion comprising an annular frame rotatably mounted on the base and connected to the drive mechanism, and a clamping portion, the annular frame being provided with a plurality of mounting slots uniformly arranged along the circumference, wherein pads for placing hardware parts are rotatably mounted in the mounting slots, and the pads are connected to locking mechanisms for positioning and clamping the hardware parts and automatically unloading the welded hardware parts from the pads. The hardware welding tool based on the multi-point positioning locking mechanism and the multi-point positioning process thereof can effectively solve the problems in the prior art of welding hardware composed of a base plate and a channel steel, wherein insufficient pressing between the channel steel and the base plate results in insufficient tight fit, leading to positioning deviation, insufficient welding, and low production efficiency.

Description

Technical Field

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

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

[0003] At present, when welding such hardware, the conventional process is for workers to place the base plate and channel steel on a simple fixture and then weld the joints between the two. This operation method has many disadvantages:

[0004] On the one hand, from the perspective of tightness of fit and positioning accuracy, since simple fixtures can usually only provide limited clamping force, the channel steel and the base plate may not fit tightly enough due to insufficient pressing, which not only affects the welding quality, but may also cause various problems due to loose components in subsequent use. In addition, the positioning accuracy between the two is insufficient, and the relative position may deviate, which in turn affects 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] In response to the above-mentioned shortcomings of the prior art, the present invention provides a hardware welding tool and a multi-point positioning process based on a multi-point positioning locking mechanism, which can effectively solve the problems in the prior art that, when welding hardware composed of a base plate and a channel steel, the channel steel and the base plate are not tightly fitted due to insufficient pressing, resulting in positioning deviation, insufficient welding and low production efficiency.

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

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

[0008] A support portion, the support portion comprising a base, on which a driving mechanism is mounted;

[0009] A rotating portion, comprising an annular frame rotatably mounted on a base and connected to a driving mechanism;

[0010] The clamping part has a plurality of mounting grooves evenly arranged along the circumference of the annular frame, and pads for placing hardware are rotatably installed in the mounting grooves. The pads are connected with locking mechanisms for positioning and clamping the hardware and automatically unloading the welded hardware from the pads.

[0011] Among them, the upper end surface of the base is distributed with loading points, welding points and unloading points at intervals along the circumference, and they respectively correspond to the three specific stop positions of the annular frame during the rotation process. Welding arms are provided on the outside of the base and corresponding to the welding points. The positions corresponding to the loading points, welding points and unloading points of the base are connected to a pushing mechanism that cooperates with the locking mechanism;

[0012] Among them, when the ring 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 ring frame rotates intermittently under the drive mechanism, so that the above process is cyclical.

[0013] Furthermore, the driving mechanism includes an outer ring gear, which is fixedly mounted on the lower end of the annular frame. A transmission gear is engaged on the outside of the outer ring gear. The transmission gear is rotatably connected to the base through a connecting shaft, and the lower end of the connecting shaft is fixedly connected to the drive shaft of the servo motor.

[0014] Furthermore, the locking mechanism includes a spring seat, which is fixedly connected to the upper end surface of the pad through a magnetic pad. The fixed section of the spring seat is fixedly connected to an internal clamping assembly 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 to a pressing piece for pressing the channel steel to make it fit with the base plate. A centering positioning assembly is also installed on the pad.

[0015] Furthermore, the inner clamping assembly includes a mounting seat, which is fixedly connected to the connecting rod. The end of the mounting seat pointing to the outside of the annular frame is fixedly connected to a positioning block through a short rod. The positioning block adopts a magnetic design. Two round rods are symmetrically mounted on the mounting seat for rotation. A cylindrical rubber block is symmetrically fixed and eccentrically sleeved on the round rod. The outer circumferential surface of the cylindrical rubber block is provided with a strip groove to increase its friction.

[0016] Furthermore, a cylindrical groove wheel is fixedly provided on the round rod, and an oblique groove is provided on the outer circumferential surface of the cylindrical groove wheel near the mounting seat. A pressing rod is slidably connected to the mounting seat, and an annular block slidably connected to the mounting seat is fixedly provided on the pressing rod and located inside the mounting seat. Two guide blocks slidably connected in two oblique grooves are symmetrically fixedly connected to the annular block, and the upper end of the pressing rod is fixedly connected to the pressing piece.

[0017] Furthermore, the centering positioning assembly includes two cylindrical rubber blocks, and the two cylindrical rubber blocks are symmetrically connected to the pad through a vertical rod eccentrically fixedly connected to the vertical rod. The lower end of the vertical rod is fixedly connected to a cylindrical sheave. The cylindrical sheave is also provided with an inclined groove. An annular block is slidably connected inside the cylindrical sheave, and a guide block is also fixedly connected to the annular block. The guide block is slidably connected in the inclined groove of the cylindrical sheave.

[0018] Furthermore, the lower end of the annular block 2 is fixedly connected to a connecting rod, the lower end of the connecting rod slides through the cylindrical groove wheel 2 and is fixedly connected to a push rod, the lower end surface of the pad is rotatably connected to a connecting piece through a connecting plate, the inner side wall of the annular frame is fixedly connected to an annular limit ring through a cross bar, the connecting piece is slidably connected to the push rod and the annular limit ring, and a guide groove is also opened on the connecting piece to prevent interference with the connecting rod.

[0019] Furthermore, the pushing mechanism includes a support, which is fixedly connected to the base, and a cylinder is fixedly installed on the support and the base at the loading point, welding point and unloading point. The piston rod of the cylinder passes through the support and is fixedly connected to the lifting rod. The upper end of the lifting rod is fixedly connected to a pressing plate, and a fixed sleeve is provided on the lifting rod. The upper end of the support is fixedly connected to a mounting frame, and the mounting frame is connected to a pressing seat for sliding up and down at the loading point, welding point and unloading point. The pressing seat and the annular connecting block are connected by a pressing spring, and the pressing piece and the pad pointing to the inner side of the annular frame are respectively fixedly connected with tongue plates that cooperate with the pressing plate and the pressing seat.

[0020] Furthermore, the locking mechanism also includes a support ring, which is arranged on the outside of the annular frame and fixedly connected to the base. A notch is provided on the upper end face of the support ring at the unloading point. A limiting ring is fixedly connected to the horizontal section located on the inner side of the annular frame to prevent the pad from excessively deflecting inward.

[0021] A multi-point positioning process for a metal welding tool based on a multi-point positioning locking mechanism comprises the following steps:

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

[0023] S2. Preliminary positioning of the loading point: The pushing mechanism of the loading point operates to tilt the pad, and the base plate and channel steel slide with the help of gravity, and are initially fixed using magnetic force.

[0024] S3. Precise positioning of welding points: The pushing mechanism of the welding point operates to push the base plate and channel steel to the center of the pad and lock them to ensure that the two fit tightly.

[0025] S4. Welding and resetting: Welding is carried out after positioning is completed. After welding is completed, the pushing mechanism is reset to release the lock on the base plate and channel steel.

[0026] S5. Unloading: The welded hardware is transferred to the unloading point along with the ring frame. The pushing mechanism tilts the pad and the hardware falls into the storage container by gravity.

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

[0028] 1. The present invention provides a supporting part, a rotating part and a clamping part, and the annular frame rotates intermittently under the drive mechanism, thereby realizing the cycle of loading, welding and unloading processes, reducing manual operation steps, and making the entire welding process more automated and efficient.

[0029] 2. At the welding point of the present invention, the pushing mechanism drives the pad to rotate, and the centering positioning component and the inner clamping component in the locking mechanism work together to first move the base plate to the center position of the pad and lock it, and then move the channel steel to the center position on the base plate and lock it, thereby achieving precise adjustment of the relative positions of the two, greatly improving the positioning accuracy, and avoiding the impact of positioning deviation on subsequent processing procedures and product assembly and performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive effort.

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

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

[0033] Figure 3 This is a structural schematic diagram of a supporting portion, a rotating portion, and a clamping portion in a hardware welding tool based on a multi-point positioning and locking mechanism of the present invention;

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

[0035] Figure 5 This is a schematic diagram of the partial structure of the support portion, annular frame, locking mechanism and pushing mechanism in a hardware welding tool based on a multi-point positioning locking mechanism of the present invention;

[0036] Figure 6 For the present invention Figure 5 A partial enlarged view of the M in the middle;

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

[0038] Figure 8This is an exploded view of an inner clamping assembly in a hardware welding tool based on a multi-point positioning locking mechanism of the present invention;

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

[0040] Figure 10 It is a structural diagram of the hardware that the present invention is intended to serve.

[0041] The numbers in the figure represent: 1. support part; 11. base; 12. drive mechanism; 121. outer ring gear; 122. transmission gear; 123. servo motor; 2. rotating part; 21. annular frame; 3. clamping part; 31. pad; 32. locking mechanism; 321. spring seat; 322. magnetic pad; 323. inner clamping assembly; 3231. mounting seat; 3232. positioning block; 3233. round rod; 3234. cylindrical rubber block 1; 3235. cylindrical sheave 1; 3236. pressing rod; 3237. annular block 1; 3238. guide Block; 324, pressing part; 325, centering positioning assembly; 3251, cylindrical rubber block 2; 3252, cylindrical groove wheel 2; 3253, push rod; 3254, connecting part; 3255, annular limit ring; 33, pushing mechanism; 331, support platform; 332, cylinder; 333, lifting rod; 334, pressing plate; 335, annular connecting block; 336, mounting bracket; 337, pressing seat; 338, pressing spring; 339, tongue plate; 34, support ring; 35, limit ring; 4, welding arm; a, loading point; b, welding point; c, unloading point. DETAILED DESCRIPTION

[0042] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

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

[0044] Example:

[0045] See also Figure 2-Figure 10 The present invention provides a technical solution: a hardware welding tool based on a multi-point positioning and locking mechanism, comprising:

[0046] The support part 1 includes a base 11 , on which a driving mechanism 12 is mounted.

[0047] The rotating part 2 includes an annular frame 21 rotatably mounted on the base 11 , connected to the driving mechanism 12 , and intermittently rotated by the driving mechanism 12 .

[0048] The clamping part 3 and the annular frame 21 are provided with a plurality of mounting grooves evenly distributed along the circumference. Pads 31 for placing hardware are rotatably installed in the mounting grooves. The pads 31 are connected to a locking mechanism 32 for positioning and clamping the hardware and automatically unloading the welded hardware from the pads 31.

[0049] Among them, the loading point a, welding point b and unloading point c are distributed at intervals along the circumferential direction on the bearing plane of the base 11, and respectively correspond to the three specific stop positions of the annular frame 21 during the rotation process. A welding arm 4 is provided on the outside of the base 11 and corresponding to the welding point b. The positions corresponding to the upper and lower points, welding point b and unloading point c of the base 11 are connected with a pushing mechanism 33 that cooperates with the locking mechanism 32.

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

[0051] During the specific work, when the gap of the annular frame 21 is stationary, the worker places the substrate and channel steel on the pad 31 that is resting at the loading point a at the loading point a. The pushing mechanism 33 at the loading point a operates to make the end of the pad 31 pointing to the center of the annular frame 21 tilt downward, so that the substrate and channel steel slide from high to low on the pad 31 under the action of their own gravity and are adsorbed on the locking mechanism 32 to achieve preliminary positioning. Then, as the driving mechanism 12 operates, it will be intermittently transported to the welding point b through the annular frame 21. After reaching the welding point b, the pushing mechanism 33 at the welding point b operates, first driving the pad 31 to rotate, so that its end pointing to the inner side of the annular frame 21 tilts downward, and then drives the locking mechanism 32 to first move the substrate to the center position on the pad 31 and lock it, and then move the channel steel to the center position on the substrate and lock it, so as to achieve precise adjustment of the relative positions of the two, and then weld the connection between the two through the welding arm 4.

[0052] After welding is completed, the pushing mechanism 33 of the welding point b is reset, driving the pad 31 to be reset to a horizontal state synchronously, and then the driving mechanism 12 drives the annular frame 21 to continue to rotate, and then the welded substrate and channel steel are transported to the unloading point c. The pushing mechanism 33 of the unloading point c drives the pad 31 to rotate, so that the end pointing to the outside of the annular frame 21 tilts downward, and then the hardware formed after welding falls from the pad 31 to the external storage container.

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

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

[0055] The locking mechanism 32 includes a spring seat 321, which is fixedly connected to the upper end surface of the pad 31 through a magnetic pad 322. The fixed section of the spring seat 321 is fixedly connected to an inner clamping assembly 323 through a connecting sleeve and a connecting rod pointing to the outside of the annular frame 21. The top of the movable section of the spring seat 321 is fixedly connected to a pressing piece 324 for pressing the channel steel to make it fit with the substrate. A centering positioning assembly 325 is also installed on the pad 31 to align the substrate in the center of the pad 31.

[0056] The inner clamping assembly 323 includes a mounting seat 3231, which is fixedly connected to the connecting rod. The end of the mounting seat 3231 pointing to the outside of the annular frame 21 is fixedly connected to 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 pad 31 due to centrifugal force during rotation. Two round rods 3233 are symmetrically mounted on the mounting seat 3231. A cylindrical rubber block 3234 is symmetrically fixed and eccentrically sleeved on the round rod 3233. The outer circumferential surface of the cylindrical rubber block 3234 is provided with a strip groove to increase To increase the friction force, the round rod 3233 is also fixedly provided with a cylindrical groove wheel 3235, and an oblique groove is provided on the 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, and 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.

[0057] When 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 piece 324 and the pad 31 is greater than the height of the channel steel, reserving space for the placement of the pad 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 to it are also in a relatively upper position in the corresponding inclined groove, and the two cylindrical rubber blocks 3234 are also close to each other to facilitate the placement of the channel steel.

[0058] The centering positioning assembly 325 includes a second cylindrical rubber block 3251. The second cylindrical rubber block 3251 is symmetrically connected to the pad 31 through a vertical rod fixedly connected to the eccentric thereof. The lower end of the vertical rod is fixedly connected to a second cylindrical sheave 3252. The second cylindrical sheave 3252 also has an inclined groove. The inside of the cylindrical sheave is slidably connected to a second annular block. The second annular block is also fixedly connected to a guide block 3238. The guide block 3238 is slidably connected to the second cylindrical sheave 3252. In the inclined groove, the lower end of the annular block 2 is fixedly connected to a connecting rod, the lower end of the connecting rod slides through the cylindrical groove wheel 2 3252 and is fixedly connected to the push rod 3253, the lower end surface of the pad 31 is rotatably connected to the connecting piece 3254 through the connecting plate, the inner side wall of the annular frame 21 is fixedly connected to the annular limit ring 3255 through the cross bar, the connecting piece 3254 is slidably connected to 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.

[0059] When not subject to external force, the pad 31 is in a horizontal state, and the connecting piece 3254 is also in a horizontal state under the action of the annular limit ring 3255. The annular block 2 is in a relatively upper position in the cylindrical groove wheel 2 3252, and the corresponding guide block 3238 connected to the annular block 2 is also in a relatively upper position in the corresponding inclined groove. In this state, the corresponding two cylindrical rubber blocks 2 3251 are in a state of being away from each other, so as to facilitate the placement of the substrate on the pad 31.

[0060] The pushing 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 loading point a, welding point b and unloading point c. The piston rod of the cylinder 332 passes through the support platform 331 and is fixedly connected to the lifting rod 333. The upper end of the lifting rod 333 is fixedly connected to a pressing plate 334, and a ring-shaped connecting block 335 is fixedly sleeved on the lifting rod 333. The upper end of the support platform 331 is fixedly connected to a mounting bracket 336. The mounting bracket 336 is fixedly connected to a pressing seat 337 at the loading point a, welding point b and unloading point c, and the pressing seat 337 and the annular connecting block 335 are connected by a pressing spring 338. The pressing piece 324 and the pad 31 pointing to the inner side of the annular frame 21 are respectively fixedly connected with a tongue plate 339 that cooperates with the pressing plate 334 and the pressing seat 337.

[0061] Initially, the piston rod of the cylinder 332 is in an extended state, and the tongue plate 339 connected to the pad 31 and the upper and lower horizontal sections of the pressing seat 337 are offset from each other in the vertical direction to avoid interference between the pad 31 and the tongue plate 339 when they rotate with the annular frame 21. The tongue plate 339 connected to the pressing piece 324 is located below the pressing plate 334.

[0062] The locking mechanism 32 also includes a support ring 34, which is arranged on the outside of the annular frame 21 and fixedly connected to the base 11, and is used to keep the pad 31 horizontal during the rotation with the annular frame 21. A notch is provided on the upper end surface of the support ring 34 at the unloading point c, which is used to allow the end of the pad 31 pointing to the outside of the annular frame 21 to deflect downward. A limit ring 35 is fixedly connected to the horizontal section located on the inner side of the annular frame 21 to prevent the pad 31 from excessively deflecting inward.

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

[0064] When the substrate and channel steel placed on the pad 31 move to the welding point b along with the annular frame 21 and the pad 31, they will stay for a short time. During the stay, the piston rod of the cylinder 332 at the welding point b will shrink, driving the lifting rod 333 to descend.

[0065] When the lifting rod 333 is lowered, the pressing seat 337 will be driven to descend synchronously through the annular connecting block 335 and the pressing spring 338, thereby driving the pad 31 pointing to the inner end of the annular frame 21 to deflect downward through the tongue plate 339, driving the cylindrical groove wheel 2 3252 to move downward synchronously. In this process, since one end of the connecting piece 3254 is restricted by the annular limit ring 3255, the distance between its other end and the pad 31 will increase, thereby driving the connecting rod and the annular block 2 to move downward through the push rod 3253, driving the guide block 3238 to slide downward relatively in the inclined groove on the cylindrical groove wheel 2 3252, and then driving the cylindrical groove wheel 2 3252 and the vertical rod to rotate synchronously. Since the cylindrical groove wheel 2 3252 is eccentrically connected to the vertical rod, the rotation of the vertical rod will drive the distance between the two cylindrical groove wheels 3252 to decrease, thereby pushing the substrate from both sides, causing it to move to the middle position of the pad 31, thereby realizing 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 piece 324 to descend synchronously, thereby driving the spring seat 321 to further contract. The contraction of the spring seat 321 will drive the pressing piece 324 to move synchronously in the direction close to the pad 31. During the movement, the pressing piece 324 will drive the pressing rod 3236 to move downward relative to the mounting seat 3231, thereby sliding downward through the annular block 1 3237 thereon, and then sliding in the corresponding inclined groove through the two guide blocks 3238 connected to the annular block 1 3237, so that the cylindrical sheave 1 3235 and The round rod 3233 rotates, and the rotation of the round rod 3233 will drive the eccentrically connected cylindrical rubber block on it to rotate synchronously until it contacts the inner wall of the channel steel, so that the channel steel is centered on the base plate. At the same time, the rotation of the cylindrical rubber block will also exert a tangential friction force on the inner wall of the channel steel pointing to the center of the annular frame 21, driving the channel steel and the positioning block 3232 to press tightly against each other. The pressing piece 324 stops moving when it moves to contact the top of the channel steel, thereby applying a pressing force from top to bottom to the channel steel, so that it is pressed tightly against the lower end and the base plate. After that, the connection between the base plate and the channel steel can be welded by an external robotic arm.

[0067] After welding is completed, the piston rod of the cylinder 332 extends out to reset and drive the pad 31 to reset to a horizontal state synchronously. During this process, the I-shaped part will be reset to a horizontal state synchronously due to the restriction of the annular limit ring 3255, thereby driving the two cylindrical rubber blocks 3251 to rotate and reset synchronously, and the pressing piece 324 will also move up and reset synchronously under the drive of the spring seat 321, thereby indirectly driving the two cylindrical rubber blocks 1 3234 to rotate and reset synchronously through the round rod 3233. During the rotation and reset process of the cylindrical rubber blocks 1 3234 and the cylindrical rubber blocks 2 3251, they will respectively apply tangential friction forces pointing to the outside of the annular frame 21 to the channel steel and the base plate, thereby enabling the channel steel and the base plate to overcome the magnetic force between the positioning block 3232 and the magnetic pad 322 and separate from the two respectively, so as to facilitate subsequent unloading.

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

[0069] It is worth mentioning that the above-mentioned hardware welding tooling based on the multi-point positioning locking mechanism has the following advantages:

[0070] Advantage 1: Improved positioning accuracy: The positioning accuracy of the simple fixture in the prior art is insufficient, which leads to deviation in the relative position of the channel steel and the base plate. At the welding point b of the present invention, the pushing mechanism 33 drives the pad 31 to rotate, and the centering positioning component 325 and the inner clamping component 323 in the locking mechanism 32 work together to first move the base plate to the center position of the pad 31 and lock it, and then move the channel steel to the center position on the base plate and lock it, thereby achieving precise adjustment of the relative position of the two, greatly improving the positioning accuracy, and avoiding the impact of positioning deviation on subsequent processing procedures and product assembly and use performance.

[0071] Advantage 2: Improved production efficiency: In order to solve the problems of cumbersome operations and low production efficiency in the existing technologies such as manual handling, visual positioning, and single-sided multi-point simple clamping, the present invention provides a support part 1, a rotating part 2 and a clamping part 3. The annular frame 21 rotates intermittently under the drive mechanism 12 to realize the cycle of loading, welding and unloading processes, reduce manual operation steps, and make the entire welding process more automated and efficient.

[0072] Advantage three: easy unloading: after welding is completed, the cylindrical rubber block 1 3234 and the cylindrical rubber block 2 3251 will respectively apply tangential friction forces pointing to the outside of the annular frame 21 to the channel steel and the base plate during the rotation and reset process, so that the channel steel and the base plate can overcome the magnetic force between the positioning block 3232 and the magnetic pad 322 and separate from the two respectively. The hardware falls from the pad 31 to the external storage container under the action of its own gravity, which is convenient for subsequent unloading and improves the continuity of production.

[0073] Advantage 4: Enhanced welding effect and stability: During the positioning process, the cylindrical rubber block 3234 can not only push the channel steel to center it, but the increased friction caused by the strip grooves on its circumferential surface can also apply a tangential friction force to the inner wall of the channel steel pointing to the center of the annular frame 21 when pushing the channel steel, driving the channel steel and the positioning block 3232 to press tightly against each other. When the cylindrical rubber block 3251 centers the substrate, the friction force is also used to make the substrate and the channel steel fit more closely. During welding, this close fit can reduce cold welding and desoldering, and in subsequent use, it can effectively prevent failures caused by loose components, thereby improving the overall quality and stability of the product.

[0074] See also Figure 1 On the other hand, the present invention also provides a multi-point positioning process for a metal welding tool based on a multi-point positioning locking mechanism, which specifically includes the following steps:

[0075] S1. Loading preparation: When the ring frame 21 stops at the loading point a, the worker places the substrate and channel steel onto the pad 31;

[0076] S2. Preliminary positioning of loading point a: The pushing mechanism 33 of loading point a operates to tilt the pad 31, and the base plate and channel steel slide with the help of gravity, and are initially fixed by magnetic force;

[0077] S3, precise positioning of welding point b: The pushing mechanism 33 of welding point b operates to push the base plate and channel steel to the center of the backing plate 31 and lock them to ensure that the two are tightly fitted;

[0078] S4, welding and resetting: welding is performed after positioning is completed. After welding is completed, the pushing mechanism 33 is reset to release the lock on the base plate and the channel steel;

[0079] 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.

[0080] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, 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), a driving mechanism (12) being mounted on the base (11); A rotating portion (2), the rotating portion (2) comprising an annular frame (21) rotatably mounted on a base (11) and connected to a driving mechanism (12); The clamping portion (3) is provided with a plurality of mounting grooves uniformly arranged along the circumference of the annular frame (21), and a backing plate (31) for placing hardware is rotatably mounted in each of the mounting grooves. The backing plate (31) is connected to 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 unloading 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 on the outer side of the base (11) and corresponding to the welding point (b). The positions corresponding to the loading point (a), the welding point (b) and the unloading point (c) of the base (11) are connected with a pushing mechanism (33), which can be used to assist the locking mechanism (32) in completing the clamping and unloading actions. The locking mechanism (32) includes a spring seat (321), the spring seat (321) is fixedly connected to the upper end surface of the backing plate (31) through a magnetic pad (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), 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); The pushing mechanism (33) includes a support (331), the support (331) is fixedly connected to the base (11), and a cylinder (332) is fixedly installed on the support (331) and the base (11) at the loading point (a), the welding point (b) and the unloading point (c). The piston rod of the cylinder (332) passes through the support (331) and is fixedly connected to the lifting rod (333). The upper end of the lifting rod (333) is fixedly connected to a pressing plate (334). The lifting rod (333) is fixedly sleeved with an annular connecting block (335). ), the upper end of the support (331) is fixedly connected to a mounting frame (336), and the mounting frame (336) is slidably connected to a pressing seat (337) at the loading point (a), the welding point (b) and the unloading point (c), and 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 to a tongue plate (339) that matches the pressing plate (334) and the pressing seat (337); 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 the unloading of finished products at the unloading point (c). The annular frame (21) rotates intermittently under the drive mechanism (12), so that the loading, welding and unloading processes are cyclically carried out.

2. The hardware welding tool based on the multi-point positioning and locking mechanism according to claim 1, characterized in that: The driving mechanism (12) includes an outer gear ring (121), which 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 drive shaft of the servo motor (123).

3. The hardware welding tool based on the multi-point positioning and locking mechanism according to claim 1, characterized in that: The inner clamping assembly (323) includes a mounting seat (3231), the mounting seat (3231) is fixedly connected to the 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, and the positioning block (3232) adopts a magnetic design. Two round rods (3233) are also symmetrically mounted on the mounting seat (3231), and a cylindrical rubber block (3234) is symmetrically fixed and eccentrically sleeved on the round rod (3233). The outer circumferential surface of the cylindrical rubber block (3234) is provided with a strip groove to increase its friction.

4. The hardware welding tool based on the multi-point positioning and locking mechanism according to claim 3, characterized in that: A cylindrical sheave (3235) is fixedly provided on the round rod (3233), and an oblique groove is provided on the outer circumferential surface of the cylindrical sheave (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). The upper end of the pressing rod (3236) is fixedly connected to the pressing member (324).

5. The hardware welding tool based on the multi-point positioning and locking mechanism according to claim 4, characterized in that: The centering positioning assembly (325) includes two cylindrical rubber blocks (3251). The two cylindrical rubber blocks (3251) are symmetrically connected to the pad (31) through vertical rods fixedly connected to the eccentricity thereof. The lower end of the vertical rod is fixedly connected to a second cylindrical sheave (3252). The second cylindrical sheave (3252) is also provided with an oblique groove. The inside of the cylindrical sheave is slidably connected to a second annular block. The second annular block is also fixedly connected to a guide block (3238). The guide block (3238) is slidably connected in the oblique groove of the second cylindrical sheave (3252).

6. The hardware welding tool based on the multi-point positioning and locking mechanism according to claim 5, characterized in that: The lower end of the annular block 2 is fixedly connected to a connecting rod, the lower end of the connecting rod slides through the cylindrical groove wheel 2 (3252) and is fixedly connected to the push rod (3253), the lower end surface of the pad (31) is rotatably connected to the connecting piece (3254) through the connecting plate, the inner side wall of the annular frame (21) is fixedly connected to the annular limiting ring (3255) through the cross bar, the connecting piece (3254) is slidably connected to the push rod (3253) and the annular limiting ring (3255), and the connecting piece (3254) is also provided with a guide groove to prevent interference with the connecting rod.

7. The hardware welding tool based on the multi-point positioning and locking mechanism according to claim 1, characterized in that: The locking mechanism (32) further comprises a support ring (34), which is arranged on the outside of the annular frame (21) and 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). A limit ring (35) is fixedly connected to the annular frame (21) on a horizontal section located on the inner side thereof, for preventing the pad (31) from excessively deflecting inward.

8. The multi-point positioning process of a metal 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 channel steel on the pad (31); S2. Initial 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. Precise 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 together; S4, welding and resetting: welding is performed after positioning is completed, and the pushing mechanism (33) is reset after welding is completed, releasing 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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