A welding device applied to machining of machine tool frame

Abstract

This invention discloses a welding device for machining machine tool frames, relating to the field of welding technology. It includes a limiting and conveying assembly for clamping and limiting a horizontal square tube, and for conveying the tube under a driving action. The assembly includes a body and a frame mounted on top of the body, as well as a supporting conveying component on the frame for supporting and conveying the tube, and side limiting and pressing components for limiting and pressing the sides of the tube. This invention, through a four-sided elastic encircling limiting structure and rolling pressing contact, restricts multi-directional displacement of the tube and avoids scratching the outer wall of the square tube by hard pressure, ensuring the accuracy of horizontal and vertical overlap from the source. This significantly improves weld neatness and frame size consistency. The arc-shaped hopper for centralized material storage and the hydraulic cylinder for automatic single-tube feeding eliminate the need for frequent manual handling of tubes, reducing labor and shortening the processing time for a single workpiece. The mechanically adjustable fixed-distance unlocking mechanism controls the feed rate per cycle through mechanical stroke control, allowing for rapid adaptation to frames with different span specifications.

Description

Technical Field

[0001] This invention relates to the field of welding technology, and in particular to a welding apparatus for machining machine tool frames. Background Technology

[0002] The machine tool frame is mainly made of horizontal and vertical square tubes welded together at an orthogonal overlap. It is the load-bearing foundation of the entire machine tool and has high requirements for the consistency of welding dimensions, weld formation, and accuracy of tube overlap position.

[0003] However, in practical applications, there are still some unresolved problems. The welding of the frame mostly relies on manual step-by-step operations: first, the horizontal square tubes are placed manually, and simple blocks on one side limit the movement. The tubes lack all-round constraints during transportation, which can easily cause left and right movement, up and down warping, and end offset, resulting in misalignment of longitudinal tube overlaps and skewed welds. The longitudinal square tubes need to be manually picked up and placed one by one by workers, which is time-consuming and labor-intensive. Summary of the Invention

[0004] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the invention.

[0005] In view of the problems existing in the above and / or existing welding apparatuses used for machining machine tool frames, the present invention is proposed.

[0006] Therefore, the problem to be solved by this invention is how to solve the problems of horizontal square tube conveying with only one-sided limiting, no omnidirectional constraint, conveying edge tilting and deviation, large deviation of longitudinal tube overlap position, and low efficiency of manual and scattered feeding of longitudinal square tubes.

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a welding device for machining machine tool frames, comprising: a limiting and conveying assembly for clamping and limiting a transverse square tube, and for conveying the transverse square tube under driving action; the assembly includes a body and a frame disposed on the top of the body, and a supporting conveying component for supporting and conveying the transverse square tube, and a side limiting component and a side pressing component for limiting and pressing the sides of the transverse square tube disposed on the frame; the limiting and conveying assembly further includes an upper pressing component disposed on the frame for pressing the top of the transverse square tube; and a feeding assembly, installed on the limiting and conveying assembly, for feeding a longitudinal square tube to be welded between two transverse square tubes, and for driving the supporting and conveying component to move the transverse square tube at a fixed distance to achieve welding after intermittent feeding of the longitudinal square tube; the feeding assembly includes: a feeding... The machine consists of several parts: a feeding component, an arc-shaped hopper, a transmission component, a trigger component, and a welding machine. The arc-shaped hopper is fixed to the machine body by a support rod and has one end connected to and cooperates with the feeding component. The transmission component is installed on the machine body and the supporting conveyor component and cooperates with the supporting conveyor component. The trigger component is installed on the transmission component and cooperates with the feeding component. Under the operation of the feeding component, the trigger component drives the transmission component to act on the supporting conveyor component to drive the horizontal square tube to move at a fixed distance. The fixed-distance unlocking component is installed on the machine body and cooperates with the trigger component. After the horizontal square tube has moved at a fixed distance, the action of the feeding component on the trigger component is released, and the transmission component will no longer act on the supporting conveyor component to drive the horizontal square tube to move as the feeding component continues to operate.

[0008] As a preferred embodiment of the welding device for machine tool frame processing described in this invention, the frame consists of several units arranged in a linear array and symmetrically distributed. The supporting conveyor components include: several support rollers, one end of which is rotatably connected to the frame and arranged in a linear array and symmetrically distributed; a rubber sleeve fixedly fitted onto the surface of the support roller; a timing disc fixed to one end of the support roller; and a timing belt that is driven and fitted onto the surfaces of two adjacent timing discs.

[0009] As a preferred embodiment of the welding device for machine tool frame processing described in this invention, the side limiting components are a plurality of components, which are symmetrically distributed in a linear array. The side limiting components include: a limiting wheel, which is disposed on one side of the frame; steel balls, which are embedded in a circumferential array on one side of the limiting wheel; a short block, which is disposed on one side of the machine body; a guide rod, which slides through the short block; an L-shaped plate, which is fixed to the upper end of the guide rod and the limiting wheel rotates on the L-shaped plate; and a spring, which is sleeved on the surface of the guide rod and whose two ends are respectively fixed between the bottom of the L-shaped plate and the top of the short block.

[0010] As a preferred embodiment of the welding device for machine tool frame processing described in this invention, the side abutment members are a plurality of those members, which are symmetrically distributed in a linear array. The side abutment members include: an abutment wheel, which is disposed on one side of the frame; a second guide rod, which slides through the frame; a second L-shaped plate, which is fixed to one end of the second guide rod, and the abutment wheel rotates on the second L-shaped plate; and a second spring, which is sleeved on the surface of the second guide rod, and whose two ends are respectively fixed between the surface of the frame and the surface of the second L-shaped plate.

[0011] As a preferred embodiment of the welding device for machine tool frame processing described in this invention, the upper pressing components are a plurality of components arranged in a linear array and symmetrically distributed. The upper pressing components include: a pressure roller disposed on one side of the frame, a guide rod three slidingly passing through the frame, a U-shaped plate fixed to the lower end of the guide rod three, with the pressure roller rotating on the U-shaped plate, and a spring three sleeved on the surface of the guide rod three, with both ends fixed between the surface of the frame and the surface of the U-shaped plate, respectively.

[0012] As a preferred embodiment of the welding device for machine tool frame processing described in this invention, the feeding component includes: a frame fixed to the machine body by a support rod, with one end of the arc-shaped hopper connected to the frame; a top block sliding within the frame for feeding the longitudinal square tubes that have entered the frame; magnets arranged in a linear array on the top of the top block; a connecting plate with one end fixed to the surface of the top block and sliding on the frame; a roller rotating at the other end of the connecting plate and cooperating with a trigger; and a second hydraulic cylinder fixed to the bottom of the frame, with the upper end of its output shaft fixed to the bottom of the top block.

[0013] As a preferred embodiment of the welding device for machining machine tool frames according to the present invention, the transmission component includes: a fixed frame, fixed to the surface of the machine body; a rotating rod, rotating on the fixed frame; a ratchet, the inner ring of which is fixedly sleeved on one end surface of the rotating rod; a gear, fixedly sleeved on the outer ring surface of the ratchet; a toothed plate, disposed on one side of the gear and cooperating with the gear; and a sleeve, one end of which is fixed to one side of the timing disc, and the other end of which is sleeved on one end surface of the rotating rod.

[0014] As a preferred embodiment of the welding device for machine tool frame processing described in this invention, the triggering element includes: a square rod that slides through the lower end of the toothed plate; a trigger block that is fixed to one end of the square rod; a groove one that is opened on one side of the trigger block and cooperates with a fixed-distance unlocking element; a groove two that is opened on the other side of the trigger block and cooperates with a roller; and a spring four that is sleeved on the surface of the square rod and whose two ends are respectively fixed to the surface of the trigger block and the surface of the toothed plate.

[0015] As a preferred embodiment of the welding device for machine tool frame processing described in this invention, the fixed-distance unlocking component includes: a U-shaped rod fixed to the surface of the machine body, a sliding sleeve sleeved on the surface of the U-shaped rod and fixed by bolts, and an unlocking column fixed to one side of the sliding sleeve and cooperating with the groove.

[0016] As a preferred embodiment of the welding device for machine tool frame processing described in this invention, the feeding assembly further includes: an elastic element, which is installed on the machine body and the transmission component. The elastic element includes: a second short plate, fixed to the surface of the machine body; a square plate, which slides on the second short plate and whose upper end is fixed to the lower end of the toothed plate; and a fifth spring, which is sleeved on the surface of the square plate and whose two ends are respectively fixed between the surface of the second short plate and the surface of the toothed plate.

[0017] The beneficial effects of this invention are as follows: Through the four-sided elastic encircling limiting structure and rolling pressing contact, the multi-directional displacement of the pipe is restricted, and the hard pressure is avoided to scratch the outer wall of the square tube. The accuracy of horizontal and vertical square overlap is guaranteed from the source. The weld seam is neat and the frame size consistency is greatly improved. The arc-shaped hopper centrally stores materials and the hydraulic cylinder automatically feeds single pipes, eliminating the need for frequent manual picking and placing of pipes, reducing labor and shortening the processing time of a single set of workpieces. The mechanical adjustable fixed distance unlocking mechanism relies on mechanical stroke to control the single feed amount and can quickly adapt to frames with different span specifications. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a scene diagram of a welding device used in the machining of machine tool frames.

[0020] Figure 2 This is a three-dimensional structural diagram of a welding device used in the machining of machine tool frames.

[0021] Figure 3 This is a three-dimensional structural diagram of a welding device used in the machining of machine tool frames, taken from another perspective.

[0022] Figure 4 This is a partial three-dimensional view of a welding device used in the machining of machine tool frames.

[0023] Figure 5 Welding apparatus for use in machine tool frame machining Figure 4 Enlarged view of point A in the middle.

[0024] Figure 6 This is a partial sectional perspective view of the frame and short blocks of a welding device used in the machining of machine tool frames.

[0025] Figure 7 A partial sectional perspective view of the rubber sleeve of a welding device used in the machining of machine tool frames.

[0026] Figure 8This is a partial sectional plan view of a welding device used in the machining of machine tool frames.

[0027] Figure 9 This is a partial sectional perspective view of a welding device used in the machining of machine tool frames.

[0028] Figure 10 A three-dimensional view of a square plate and a spring used in the welding device for machining machine tool frames.

[0029] Figure 11 This is a partial sectional perspective view of the ratchet and sleeve of a welding device used in the machining of machine tool frames.

[0030] Figure 12 Welding apparatus for use in machine tool frame machining Figure 4 Enlarged view of section B in the middle.

[0031] In the diagram: 1. Limiting conveyor assembly; 11. Machine body; 12. Frame; 13. Supporting conveyor component; 14. Side limiting component; 15. Side pressing component; 16. Upper pressing component; 17. Support component; 18. Mounting component; 19. Cover; 2. Feeding assembly; 21. Feeding component; 22. Arc-shaped hopper; 23. Transmission component; 24. Trigger component; 25. Distance unlocking component; 26. Elastic component; 3. Welding machine; 4. Positioning assembly Components: 41. Fixing plate; 42. Hydraulic cylinder one; 43. Abutment block; 131. Support roller; 132. Rubber sleeve one; 133. Synchronous disc; 134. Synchronous belt; 141. Limit wheel; 142. Steel ball; 143. Short block; 144. Guide rod one; 145. L-shaped plate one; 146. Spring one; 147. Anti-detachment block one; 151. Abutment wheel; 152. Guide rod two; 153. L-shaped plate two; 154. Spring two; 155. Anti-detachment block two; 161. Pressure roller; 162. Guide rod three; 163. U-shaped plate; 164. Spring three; 165. Anti-detachment block three; 171. Vertical plate; 172. Support roller; 173. Rubber sleeve two; 181. Base; 182. Slide; 211. Frame; 212. Top block; 213. Magnet; 214. Connecting plate; 215. Roller; 216. Hydraulic cylinder two; 231. Fixing frame; 232. 233. Rotating rod; 234. Ratchet; 235. Gear; 236. Toothed plate; 237. Sleeve; 238. Short plate one; 239. Abutment ring; 241. Rubber pad; 242. Square rod; 243. Trigger block; 244. Slot one; 245. Slot two; 246. Spring four; 251. Round block; 252. U-shaped rod; 253. Sliding sleeve; 261. Unlocking pin; 262. Short plate two; 263. Square plate; 264. Spring five. Detailed Implementation

[0032] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0033] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0034] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0035] Example 1, referring to Figures 1-5 This is the first embodiment of the present invention. This embodiment provides a welding device for machining machine tool frames. The welding device for machining machine tool frames includes a limiting conveying component 1, a feeding component 2, and a welding machine 3.

[0036] Specifically, the limiting conveying assembly 1 is used to clamp and limit the horizontal square tube, and can convey the horizontal square tube under the driving action. It includes a body 11 and a frame 12 set on the top of the body 11, as well as a supporting conveying member 13 set on the frame 12 to support and convey the horizontal square tube, and a side limiting member 14 and a side pressing member 15 to limit and press the side of the horizontal square tube. The limiting conveying assembly 1 also includes an upper pressing member 16 set on the frame 12 to press the top of the horizontal square tube.

[0037] The limiting conveying component 1 is used to clamp and limit the horizontal square tubes required for welding the machine tool frame in multiple directions after feeding, avoiding the square tubes from deviating or warping. It also relies on the linkage drive of the feeding component 2 to realize the intermittent step conveying of the horizontal square tubes at a fixed distance. Through the supporting conveying component 13, the side limiting component 14, the side pressing component 15, and the upper pressing component 16, the square tubes are omnidirectionally and flexibly clamped and limited from four directions: bottom, left and right sides, and top.

[0038] Specifically, the feeding component 2 is installed on the limiting conveying component 1 and is used to feed the longitudinal square tube that needs to be welded between two horizontal square tubes, and to drive the supporting conveying component 13 to move the horizontal square tube at a fixed distance to realize the welding after the intermittent feeding of the longitudinal square tube. The feeding component 2 includes: a feeding component 21, installed on the machine body 11, for feeding the longitudinal square tube; and an arc-shaped hopper 22, fixed on the machine body 11 by a support rod, with one end connected to and cooperating with the feeding component 21, for placing the longitudinal square tube material.

[0039] The transmission component 23 is installed on the machine body 11 and the supporting conveyor component 13 and cooperates with the supporting conveyor component 13. The trigger component 24 is installed on the transmission component 23 and cooperates with the feeding component 21. It is used to drive the transmission component 23 to act on the supporting conveyor component 13 to drive the horizontal tube to move at a fixed distance under the operation of the feeding component 21. The fixed distance unlocking component 25 is installed on the machine body 11 and cooperates with the trigger component 24. It is used to release the action of the feeding component 21 on the trigger component 24 after the horizontal tube moves at a fixed distance. As the feeding component 21 runs, the transmission component 23 will no longer act on the supporting conveyor component 13 to drive the horizontal tube to move.

[0040] The feeding component 2 has two functions: first, it places the longitudinal square tubes to be welded one by one into the joint space of the two horizontal square tubes to complete the feeding of the horizontal and vertical tubes; second, it uses the action of the longitudinal square tube after a single feeding and welding and then moving downward to drive the support conveyor 13, which drives the horizontal square tube to move forward quantitatively and intermittently, realizing the linkage logic of feeding and welding completed in one go, and moving the tube forward one station after resetting downward. The discharge port of the arc-shaped hopper 22 is connected to the inlet of the feeding component 21 for batch stacking and storing the longitudinal square tubes. After the feeding component 21 extends and finishes feeding and welding, it squeezes the trigger 24 during the retraction process, which in turn drives the transmission component 23 to drive the support conveyor 13 to run. After the horizontal square tube completes a single fixed-distance movement, the fixed-distance unlocking component 25 releases the action of the feeding component 21 on the trigger 24, so that the subsequent feeding action can no longer be driven by the trigger 24, thus avoiding excessive feeding of the square tube.

[0041] Specifically, welding machine 3 is installed on the limiting conveying assembly 1 and is used for welding between horizontal and vertical square tubes. After the horizontal square tube is in place and the vertical square tube is loaded, welding machine 3 directly performs automated spot welding / full welding operations. Welding machine 3 is an automated welding robot that can automatically identify and is existing technology. The working principle of this part is also existing technology, which can be clearly understood by those skilled in the art, and will not be described in detail here.

[0042] The limiting conveying component 1 realizes omnidirectional clamping and limiting of the horizontal square tube. The feeding and conveying adopts a mechanical linkage structure. The longitudinal square tube picking action serves as the power source for the stepping conveying of the horizontal square tube, eliminating the need for an independent conveying drive cylinder / motor. The fixed-distance unlocking component 25 realizes single feeding and single delivery, accurately controlling the feeding distance of the horizontal square tube. After the tube arrives, the welding machine 3 completes the weld seam welding, realizing integrated continuous operation of material storage → feeding → fixed-distance feeding → fixed-point welding.

[0043] Example 2, refer to Figures 2-7 This is the second embodiment of the present invention, which is based on the previous embodiment.

[0044] Specifically, there are several frames 12, which are symmetrically distributed in a linear array. The frames 12 provide installation references for various limiting, pressing, and conveying parts. The supporting conveying parts 13 include: several support rollers 131, one end of which is rotatably connected to the frame 12, which are symmetrically distributed in a linear array. The support rollers 131 are rotatably connected to the frame 12 through damping bearings. A rubber sleeve 132 is fixedly sleeved on the surface of the support roller 131. The rubber sleeve 132 increases the friction coefficient with the bottom surface of the horizontal tube to prevent slippage during conveying. A synchronous disc 133 is fixed to one end of the support roller 131. A synchronous belt 134 is driven and sleeved on the surfaces of two adjacent synchronous discs 133.

[0045] There are several synchronous discs 133, the same number as the support rollers 131, and several synchronous belts 134. The synchronous discs 133 and synchronous belts 134 enable all support rollers 131 to rotate synchronously in the same direction, ensuring the smooth and parallel conveying of the entire horizontal square tube. Multiple support rollers 131 rotate synchronously by linkage with synchronous belts 134. Rubber sleeve 132 increases friction, prevents the square tube from slipping, ensures synchronous lifting and conveying at multiple support points, avoids local suspension and deformation of the square tube, and adapts to the smooth feeding of square tubes required for welding large-scale machine tool frames.

[0046] Specifically, there are several side limiting components 14 arranged in a linear array symmetrically. The side limiting components 14 form a left and right lateral reference limiting structure for the horizontal square tube. Each side limiting component 14 includes: a limiting wheel 141, located on one side of the frame 12; and steel balls 142, arranged in a circumferential array and embedded on one side of the limiting wheel 141. The steel balls 142 are rotatably connected to the limiting wheel 141 and are located on the end face of the limiting wheel 141 that is in contact with the side wall of the square tube. Rolling friction replaces sliding friction, reducing the frictional resistance of the square tube during transport. It can also replace the limiting wheel 141 for limiting. The short block 143 is set on one side of the machine body 11. The guide rod 144 slides through the short block 143. The L-shaped plate 145 is fixed to the upper end of the guide rod 144, and the limiting wheel 141 rotates on the L-shaped plate 145. The spring 146 is sleeved on the surface of the guide rod 144, and its two ends are respectively fixed between the bottom of the L-shaped plate 145 and the top of the short block 143. The anti-detachment block 147 is fixed to the bottom of the guide rod 144 by bolts.

[0047] With the setting of the limiting wheel 141, due to the arc shape design, after welding a longitudinal square tube between two horizontal square tubes, it needs to be conveyed. As the longitudinal square tube moves, it comes into contact with and is squeezed by the two limiting wheels 141 at the very end. At this time, the longitudinal square tube can squeeze the limiting wheel 141 to move down, causing the L-shaped plate 145 and the guide rod 144 to move down, and the spring 146 to compress, so that the horizontal square tube and the welded longitudinal tube can be conveyed normally at a fixed distance. At the same time, it will not affect the subsequent unloading. After the longitudinal square tube is separated from the limiting wheel 141, the two L-shaped plates 145 and the limiting wheel 141 at the end move up and reset under the action of the spring 146. The guide rod 144 has a hexagonal cross section, which plays the role of guiding, limiting and preventing rotation. The anti-detachment block 147 limits the guide rod 144 to prevent the guide rod 144 from detaching from the short block 143.

[0048] Specifically, there are several side-clamping components 15, which are symmetrically distributed in a linear array. The side-clamping components 15 cooperate with the side-limiting components 14 to elastically clamp the square tube from both sides. The side-clamping components 15 include: a clamping wheel 151, which is set on one side of the frame 12. The clamping wheel 151 rolls and clamps to reduce clamping wear and distinguish it from the rigid straight plate extrusion structure; a guide rod 152, which slides through the frame 12; an L-shaped plate 153, which is fixed to one end of the guide rod 152 and the clamping wheel 151 rotates on the L-shaped plate 153; a spring 154, which is sleeved on the surface of the guide rod 152 and whose two ends are respectively fixed between the surface of the frame 12 and the surface of the L-shaped plate 153. The spring 154 is arranged laterally and the clamping force direction is consistent with the width direction of the tube. The pre-tightening force of the spring 154 makes the clamping wheel 151 on one side clamp the horizontal square tube from the side; and an anti-detachment block 155, which is fixed to one end of the guide rod 152 by bolts.

[0049] The guide rod 152 has a hexagonal cross-section and serves as a guide, limiter, and anti-rotation device. The anti-detachment block 155 limits the guide rod 152 to prevent it from detaching from the frame 12. The side abutment wheel 151, under the action of the spring 154 and the cooperation of the steel ball 142 on the limiting wheel 141, clamps the square tube in opposite directions, forming a combination structure of limiting and abutting with the side limiting component 14, eliminating the lateral gap of the square tube and preventing left and right movement during the conveying process.

[0050] Specifically, there are several upper pressing members 16, which are symmetrically distributed in a linear array. The upper pressing members 16 press the top surface of the horizontal square tube from the vertical direction. The upper pressing members 16 include: a pressure roller 161, which is set on one side of the frame 12; a guide rod 162, which slides through the frame 12 and has a hexagonal cross-section to guide, limit and prevent rotation; a U-shaped plate 163, which is fixed to the lower end of the guide rod 162 and the pressure roller 161 rotates on the U-shaped plate 163; a spring 164, which is sleeved on the surface of the guide rod 162 and whose two ends are respectively fixed between the surface of the frame 12 and the surface of the U-shaped plate 163; and an anti-detachment block 165, which is fixed to the upper end of the guide rod 162 by bolts. The anti-detachment block 165 limits the guide rod 162 and prevents the guide rod 162 from detaching from the frame 12.

[0051] Spring 3 164 is arranged vertically to provide downward clamping force, adapting to the height dimensional error of the square tube. Relying on the elastic force of spring 3 164, the pressure roller 161 is pressed tightly against the upper surface of the square tube. The pressure roller 161 rolls and presses, avoiding hard pressure that scratches the outer wall of the tube. Spring 3 164 applies downward pressure, and the pressure roller 161 flexibly presses the square tube from the top surface. With the help of the bottom support roller 131, the two side limit rollers 141 and the abutment roller 151, four-sided surrounding and limiting are achieved, preventing the square tube from warping or jumping up and down, and ensuring the positioning accuracy of conveying and welding.

[0052] Example 3, referring to Figures 1-12 This is the third embodiment of the present invention, which is based on the first two embodiments.

[0053] Specifically, the feeding component 21 includes: a frame 211, which is fixed to the machine body 11 by a support rod, and one end of the arc-shaped hopper 22 is connected to the frame 211; a top block 212, which slides inside the frame 211 and is used to push out the longitudinal square tubes that have entered the frame 211 for feeding; magnets 213, which are linearly arrayed and embedded on the top of the top block 212; a connecting plate 214, one end of which is fixed to the surface of the top block 212 and slides on the frame 211; a roller 215, which rotates on the other end of the connecting plate 214 and cooperates with the trigger 24; and a hydraulic cylinder 216, which is fixed to the bottom of the frame 211 and whose upper output shaft is fixed to the bottom of the top block 212.

[0054] The discharge port of the arc-shaped hopper 22 is connected to the inlet of the frame 211. The longitudinal square tube pushes the material at the front end inside the arc-shaped hopper 22 by its own weight. When the inlet of the frame 211 is not blocked by the top block 212, the top block 212 moves down to expose the inlet of the frame 211, thereby pushing the longitudinal square tube at the front end into the frame 211. As the top block 212 moves up, it pushes the longitudinal square tube out to feed the material. At the same time, the top block 212 blocks the inlet of the frame 211, preventing the material from entering the frame 211, thereby achieving orderly and intermittent feeding.

[0055] The single longitudinal square tube on the top block 212 is magnetically attracted by magnet 213 to prevent it from falling during feeding. There are two connecting plates 214, which are symmetrically distributed. There are two hydraulic cylinders 216, which are symmetrically distributed. The hydraulic cylinders 216 are the feeding power components.

[0056] Specifically, there are two transmission components 23, which are symmetrically distributed. The transmission components 23 include: a fixed frame 231, which is fixed to the surface of the machine body 11; a rotating rod 232, which rotates on the fixed frame 231 and is rotatably connected to the fixed frame 231 through a bearing; one end of the rotating rod 232 is a round rod that is rotatably connected to the fixed frame 231, and the other end is a hexagonal rod that is inserted into the sleeve 236 to realize synchronous transmission between the rotating rod 232 and the support roller 131; a ratchet 233, whose inner ring is fixedly sleeved on one end surface of the rotating rod 232; a gear 234, which is fixedly sleeved on the outer ring surface of the ratchet 233; a toothed plate 235, which is set on one side of the gear 234 and cooperates with the gear 234; and a sleeve 236, one end of which is fixed to one side of the synchronous disc 133 and the other end of which is sleeved on one end surface of the rotating rod 232.

[0057] Because of the unidirectional transmission of the ratchet 233, the toothed plate 235 presses down to drive the gear 234 and the entire ratchet 233 to rotate, thereby causing the rotating rod 232, the sleeve 236 and the synchronous disc 133 to rotate, thereby causing the support roller 131 and the rubber sleeve 132 to rotate, clamping and limiting the horizontal tube of the limiting conveying assembly 1 for conveying. The toothed plate 235 rises and idles, without driving the rotating rod 232 to rotate, and thus not driving the support roller 131 to rotate, preventing the horizontal tube from retreating and returning to its original position.

[0058] A short plate 237 is fitted onto the surface of the toothed plate 235 and fixed to the body 11. An abutment ring 238 is fixedly fitted onto one end surface of the toothed plate 235. A rubber pad 239 is fixed to the bottom of the short plate 237 and cooperates with the abutment ring 238. The short plate 237 limits the movement trajectory of the toothed plate 235. With the cooperation of the abutment ring 238, the toothed plate 235 will not move excessively when it is pushed up and reset by elastic force, thus ensuring the initial position. The rubber pad 239 plays a buffering and noise reduction role when the abutment ring 238 is pushed up and reset and contacts it, thus preventing the abutment ring 238 from rebounding significantly upon impact.

[0059] When hydraulic cylinder 216 retracts, it causes top block 212, connecting plate 214, and roller 215 to move downwards. Roller 215 abuts against trigger 24, causing it to move downwards as well. Trigger 24, under pressure, drives toothed plate 235 downwards. Toothed plate 235 meshes with gear 234, which drives rotating rod 232, synchronous disc 133, and support roller 131 to rotate via ratchet 233, thus conveying the horizontal tube forward. After trigger 24 moves downwards a certain distance, it is acted upon by distance-locking device 25, causing roller 215 to no longer abut against trigger 24. Under the action of the elastic element 26, the toothed plate 235 moves upward and resets, and the ratchet 233 realizes one-way transmission. When the toothed plate 235 moves upward and resets, it idles and will not drive the support roller 131 to rotate in the opposite direction, ensuring that each downward press is a single feeding. After the top block 212 moves downward in the frame 211, the square tube in the arc-shaped hopper 22 pushes the frontmost square tube into the frame 211 by its own weight and is located above the top block 212. The hydraulic cylinder 216 extends and drives the top block 212 to move upward, sending the longitudinal square tube between the two transverse square tubes after the fixed distance movement.

[0060] Specifically, there are two trigger components 24, which include: a square rod 241 that slides through the lower end of the toothed plate 235; a trigger block 242 that is fixed to one end of the square rod 241; a slot 1 243 that is opened on one side of the trigger block 242 and cooperates with the fixed-distance unlocking component 25; a slot 244 that is opened on the other side of the trigger block 242 and cooperates with the roller 215; a spring 4 245 that is sleeved on the surface of the square rod 241 and whose two ends are fixed to the surface of the trigger block 242 and the surface of the toothed plate 235, respectively; and a round block 246 that is fixed to the other end of the square rod 241 by bolts. Both slot 1 243 and slot 244 are provided with inclined surfaces. The round block 246 limits the square rod 241 to prevent the square rod 241 from disengaging from the toothed plate 235. The spring 4 245 provides a force for the trigger block 242 and the square rod 241 to reset after movement.

[0061] Specifically, there are two fixed-distance unlocking components 25, which are symmetrically distributed. The fixed-distance unlocking component 25 includes: a U-shaped rod 251, which is fixed to the surface of the machine body 11; a sliding sleeve 252, which is sleeved on the surface of the U-shaped rod 251 and fixed by bolts; and an unlocking post 253, which is fixed to one side of the sliding sleeve 252 and cooperates with the slot 243. The sliding sleeve 252 can slide along the U-shaped rod 251 and is locked in place by bolts. The position of the sliding sleeve 252 and the unlocking post 253 is adjusted according to the length of the horizontal tube that needs to be conveyed at a fixed distance. Then, the sliding sleeve 252 and the unlocking post 253 are fixed by bolts.

[0062] With the setting of slot 243, the retraction of hydraulic cylinder 216 drives the top block 212, connecting plate 214 and roller 215 to move downward. Roller 215 contacts the plane at the top of trigger block 242, thereby pressing the trigger block 242 downward, thus causing square rod 241 and toothed plate 235 to move downward, driving gear 234, ratchet 233, rotating rod 232 and sleeve 236 to rotate. Under the action of synchronous disc 133 and synchronous belt 134, multiple support rollers 131 rotate simultaneously to transport the horizontal square tube. When the trigger block 242 moves down to slot 243 and unlocking post 25, When the contact is squeezed, the trigger block 242 is blocked by the unlocking post 253 and under the action of the inclined surface of the groove 243, the trigger block 242 moves laterally and the spring 263 is compressed, causing the roller 215 to disengage from the top plane of the trigger block 242 and stop pressing down. At this time, under the action of the elastic element 26, the toothed plate 235 moves up and resets. The continued downward movement of the top block 212 and the roller 215 no longer drives the support roller 131 to rotate, thereby realizing fixed-distance conveying. Under the action of the spring 263, the square rod 241 is reset on the toothed plate 235 and the lateral movement of the trigger block 242 is reset.

[0063] With the setting of groove 244, when the top block 212, connecting plate 214 and roller 215 move upward with the extension of hydraulic cylinder 216, at the final stage when the top block 212 pushes the longitudinal square tube onto the material, the roller 215 contacts the inclined surface inside groove 244 on the trigger block 242, thereby squeezing the trigger block 242 to move, so that the roller 215 can move upward smoothly, and at the same time prepare for the subsequent downward movement of the roller 215 to press against the top plane of the trigger block 242.

[0064] Specifically, the feeding assembly 2 also includes: elastic element 26, which is installed on the machine body 11 and the transmission component 23. There are two elastic elements 26, which include: short plate 261, which is fixed to the surface of the machine body 11; square plate 262, which slides on short plate 261 and whose upper end is fixed to the lower end of toothed plate 235; and spring 263, which is sleeved on the surface of square plate 262 and whose two ends are respectively fixed between the surface of short plate 261 and the surface of toothed plate 235. After the toothed plate 235 moves down, it automatically returns to its original position by the compressed spring 263.

[0065] The limiting conveying assembly 1 also includes: a mounting component 18, which is symmetrically mounted on the body 11 in a linear array, and the frame 12 and the side limiting component 14 are fixed on it. The mounting component 18 includes: a base 181, which is symmetrically fixed on the body 11 in a linear array; a slide 182, which slides in the base 181 and is fixed by bolts; the lower end of the frame 12 is fixed to the top of the slide 182; and a short block 143 is fixed to one side of the slide 182. The slide 182 can be slightly adjusted on the base 181 and then bolted.

[0066] The limiting conveying assembly 1 also includes: a support member 17, which is symmetrically fixed to the machine body 11 in a linear array. The support member 17 includes: a vertical plate 171, which is symmetrically fixed to the top of the machine body 11 in a linear array; a support roller 172, one end of which rotates on the vertical plate 171; and a rubber sleeve 173, which is fixedly sleeved on the surface of the support roller 172. The support member 17 can support one end of the continuously welded machine tool frame and provide multi-point support from the bottom surface of the machine tool frame to prevent it from tilting. The support roller 172 is rotatably connected to the vertical plate 171 through a bearing. The rubber sleeve 173 increases the force between the welded machine tool frame and the support roller 172.

[0067] The machine body 11 is bolted to both sides of a cover 19 with a door, and the welding machine 3 is installed on the cover 19.

[0068] The machine body 11 is symmetrically fixed with positioning components 4, which are used to abut one end of the horizontal square tube when it is initially clamped and limited. The positioning components 4 include: a fixing plate 41, which is symmetrically fixed on the machine body 11; a hydraulic cylinder 42, which is fixed on the surface of the fixing plate 41; and a stop block 43, which is fixed to one end of the output shaft of the hydraulic cylinder 42. The two positioning components 4 are responsible for positioning the initial end face of the horizontal square tube on the conveying assembly 1, and the position of the stop block 43 can be adjusted by controlling the extension and retraction of the hydraulic cylinder 42.

[0069] When in use, the incoming material is pre-positioned: the horizontal square tube is inserted into the limiting conveying assembly 1 and placed on the support roller 131. One end of the tube contacts the abutment block 43. The side limiting wheel 141 and the elastic abutment wheel 151 hug each other from left to right. The pressure roller 161 with the top spring applies pressure downwards and flexibly presses the tube. The tube is constrained in all directions, and the conveying is free from deviation and warping.

[0070] Longitudinal square material storage and feeding: Longitudinal square tubes are stored in batches into the arc-shaped hopper 22, hydraulic cylinder 216 retracts, top block 212 moves down to expose the material outlet, single tubes fall into the frame 211, cylinder rods are raised, top block 212 with magnet 213 attracts the tubes and pushes them upward, accurately sending the longitudinal square into the overlapping space between two transverse squares.

[0071] Linked fixed-distance conveying: During the downward movement of the feeding cylinder, the connecting plate 214 drives the roller 215 to press down the trigger block 242, pushing the toothed plate 235 to move down and mesh with the gear 234. Through the ratchet 233, the entire set of support rollers 131 rotates in one direction, and the horizontal tube moves forward synchronously. When the trigger block 242 moves to the position of the unlocking post 253, the inclined surface of the second groove 244 is subjected to force and shifts laterally. The roller 215 disengages, the spring 263 pushes the toothed plate 235 back to quickly reset, and the ratchet 233 idles and no longer drives the support rollers 131. The single feed ends. The conveying distance can be freely adjusted by changing the installation position of the unlocking post 253.

[0072] Spot welding: After the horizontal and vertical overlaps are in place, the welding machine 3 starts to complete the spot welding operation; after completion, the feeding, fixed-distance feeding and welding process are repeated again; the formed long frame is supported by the auxiliary support roller 172 at the bottom to avoid suspension, bending and deformation.

[0073] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A welding device for machining machine tool frames, characterized in that: include, The limiting conveying assembly (1) is used to clamp and limit the horizontal tube and can convey the horizontal tube under the driving action. It includes a body (11) and a frame (12) set on the top of the body (11), as well as a supporting conveying member (13) set on the frame (12) to support and convey the horizontal tube, and a side limiting member (14) and a side pressing member (15) to limit and press the side of the horizontal tube. The limiting conveying assembly (1) also includes an upper pressing member (16) set on the frame (12) to press the top of the horizontal tube. The feeding assembly (2) is installed on the limiting conveyor assembly (1) and is used to feed the longitudinal square tube that needs to be welded between two horizontal square tubes, and to drive the supporting conveyor (13) to move the horizontal square tube at a fixed distance to realize the welding after the intermittent feeding of the longitudinal square tube. The feeding assembly (2) includes: a feeding component (21) installed on the machine body (11) for feeding the longitudinal square tube; an arc-shaped hopper (22) fixed on the machine body (11) by a support rod, and one end of which is connected to and cooperates with the feeding component (21) for placing the longitudinal square tube material; and a transmission component (23) installed on the machine body (11) and the supporting conveyor (13) and connected to the support rod. The supporting conveyor (13) is matched with the trigger (24), which is installed on the transmission component (23) and is matched with the feeding component (21). It is used to drive the transmission component (23) to support the conveyor (13) and drive the horizontal tube to move at a fixed distance under the operation of the feeding component (21). The fixed distance unlocking component (25) is installed on the machine body (11) and is matched with the trigger (24). It is used to release the action of the feeding component (21) on the trigger (24) after the horizontal tube moves at a fixed distance. As the feeding component (21) runs, the transmission component (23) will no longer support the conveyor (13) to drive the horizontal tube to move. Welding machine (3), installed on limit conveying assembly (1), is used for welding between horizontal and vertical square tubes.

2. The welding device for machining machine tool frames as described in claim 1, characterized in that: The number of the frame (12) is several and they are arranged in a linear array symmetrically. The support conveyor (13) includes: a support roller (131), one end of which is rotatably connected to the frame (12), the number of which is several and they are arranged in a linear array symmetrically; a rubber sleeve (132), which is fixedly sleeved on the surface of the support roller (131); a synchronous disc (133), which is fixed to one end of the support roller (131); and a synchronous belt (134), which is driven and sleeved on the surfaces of two adjacent synchronous discs (133).

3. The welding device for machining machine tool frames as described in claim 1 or 2, characterized in that: The number of side limiting components (14) is several, and they are distributed in a linear array symmetrically. The side limiting components (14) include: a limiting wheel (141) set on one side of the frame (12), steel balls (142) embedded in a circular array on one side of the limiting wheel (141), a short block (143) set on one side of the machine body (11), a guide rod (144) sliding through the short block (143), an L-shaped plate (145) fixed on the upper end of the guide rod (144), and the limiting wheel (141) rotates on the L-shaped plate (145), and a spring (146) sleeved on the surface of the guide rod (144), and both ends are fixed between the bottom of the L-shaped plate (145) and the top of the short block (143).

4. The welding device for machining machine tool frames as described in claim 3, characterized in that: The number of side abutment members (15) is several, and they are distributed in a linear array symmetrically. The side abutment members (15) include: abutment wheel (151), which is set on one side of the frame (12); guide rod two (152), which slides through the frame (12); L-shaped plate two (153), which is fixed to one end of guide rod two (152), and the abutment wheel (151) rotates on L-shaped plate two (153); and spring two (154), which is sleeved on the surface of guide rod two (152), and both ends are fixed between the surface of the frame (12) and the surface of L-shaped plate two (153).

5. The welding apparatus for machining machine tool frames as described in claim 2 or 4, characterized in that: The number of the upper pressing parts (16) is several, and they are distributed in a linear array symmetrically. The upper pressing parts (16) include: a pressure roller (161), which is set on one side of the frame (12); a guide rod three (162), which slides through the frame (12); a U-shaped plate (163), which is fixed to the lower end of the guide rod three (162), and the pressure roller (161) rotates on the U-shaped plate (163); and a spring three (164), which is sleeved on the surface of the guide rod three (162), and both ends are fixed between the surface of the frame (12) and the surface of the U-shaped plate (163).

6. The welding apparatus for machining machine tool frames as described in any one of claims 1, 2, and 4, characterized in that: The feeding component (21) includes: a frame (211), which is fixed to the machine body (11) by a support rod, and one end of the arc-shaped hopper (22) is connected to the frame (211); a top block (212), which slides inside the frame (211) and is used to push out the longitudinal square tube that has entered the frame (211) for feeding; a magnet (213), which is embedded in the top of the top block (212) in a linear array; a connecting plate (214), one end of which is fixed to the surface of the top block (212) and slides on the frame (211); a roller (215), which rotates at the other end of the connecting plate (214) and cooperates with the trigger (24); and a second hydraulic cylinder (216), which is fixed to the bottom of the frame (211) and the upper end of the output shaft is fixed to the bottom of the top block (212).

7. The welding apparatus for machining machine tool frames as described in claim 6, characterized in that: The transmission component (23) includes: a fixed frame (231) fixed to the surface of the machine body (11), a rotating rod (232) rotating on the fixed frame (231), a ratchet (233) whose inner ring is fixedly sleeved on one end surface of the rotating rod (232), a gear (234) fixedly sleeved on the outer ring surface of the ratchet (233), a toothed plate (235) set on one side of the gear (234) and cooperating with the gear (234), and a sleeve (236) whose one end is fixed to one side of the synchronous disc (133) and whose other end is sleeved on one end surface of the rotating rod (232).

8. The welding apparatus for machining machine tool frames as described in claim 7, characterized in that: The triggering element (24) includes: a square rod (241) that slides through the lower end of the toothed plate (235); a trigger block (242) that is fixed to one end of the square rod (241); a groove (243) that is opened on one side of the trigger block (242) and cooperates with the fixed-distance unlocking element (25); a groove (244) that is opened on the other side of the trigger block (242) and cooperates with the roller (215); and a spring (245) that is sleeved on the surface of the square rod (241) and whose two ends are respectively fixed to the surface of the trigger block (242) and the surface of the toothed plate (235).

9. The welding apparatus for machining machine tool frames as described in claim 8, characterized in that: The fixed-distance unlocking component (25) includes: a U-shaped rod (251) fixed to the surface of the body (11), a sliding sleeve (252) sleeved on the surface of the U-shaped rod (251) and fixed by bolts, and an unlocking column (253) fixed to one side of the sliding sleeve (252) and cooperating with the groove (243).

10. The welding apparatus for machining machine tool frames as described in claim 8 or 9, characterized in that: The feeding assembly (2) further includes: an elastic element (26), which is installed on the machine body (11) and the transmission component (23). The elastic element (26) includes: a second short plate (261), which is fixed on the surface of the machine body (11); a square plate (262), which slides on the second short plate (261) and whose upper end is fixed to the lower end of the toothed plate (235); and a fifth spring (263), which is sleeved on the surface of the square plate (262) and whose two ends are respectively fixed between the surface of the second short plate (261) and the surface of the toothed plate (235).

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