Pinching tool

Abstract

The invention discloses a welding jig, including: a bottom plate, on which a sliding mechanism is provided; four electromagnetic adsorption devices distributed in a rectangular shape, each adjacent two electromagnetic adsorption devices are linked and connected, and the four electromagnetic adsorption devices are slidably connected to the bottom plate through the sliding mechanism; each electromagnetic adsorption device is provided with an inner positioning sensor and a linear push mechanism on the two inner adjacent sides, and all the inner positioning sensors are arranged near the middle of the bottom plate; four sheet material moving mechanisms with suction cups, each adjacent two electromagnetic adsorption devices are provided with a sheet material moving mechanism. The invention can position and move four sheets and splice them into a hollow frame, providing necessary technical support for the welding process of iron frame blanks. The iron frame blanks obtained through the above process not only save materials, but also avoid the generation of flash or burrs.

Description

Technical Field

[0001] The invention relates to the technical field of automobile parts production, in particular to a welding jig. Background Art

[0002] At present, cars have become a common means of transportation for people. In order to promote air circulation in the car and increase the daylighting rate in the car, some cars are equipped with sunroofs. The car sunroof mainly includes sunroof iron frame, sunroof rails, top window, sun visor and other components, among which the sunroof iron frame is a hollow frame structure. The main production process of the existing sunroof iron frame is to punch or cut the middle part of the plate to obtain a hollow iron frame blank, and then punch the iron frame blank multiple times to finally obtain the finished sunroof iron frame. However, the above production process has the following disadvantages: 1. The separated residual material cannot be further put into the production of the sunroof iron frame, resulting in low utilization rate of the plate; 2. The iron frame blank produced by punching or cutting has a lot of flash or burrs, which need to be removed in subsequent processes. Summary of the invention

[0003] The invention aims to solve at least one of the technical problems existing in the prior art. To this end, the invention proposes a welding jig, which can position and move four sheets, providing necessary technical support for the next welding process.

[0004] The welding jig according to the first embodiment of the present invention includes:

[0005] A bottom plate, on which a sliding mechanism with a locking function is provided;

[0006] Four electromagnetic adsorption devices are arranged in a rectangular shape, and each two adjacent electromagnetic adsorption devices are linked and connected, and through the sliding mechanism, the four electromagnetic adsorption devices are slidably connected to the bottom plate; the two inner adjacent sides of each electromagnetic adsorption device are provided with an inner positioning sensor for detecting the position of the sheet material and a linear pushing mechanism for pushing the sheet material toward the inner positioning sensor, and all the inner positioning sensors are arranged near the middle of the bottom plate;

[0007] There are four sheet material moving mechanisms with suction cups, and one sheet material moving mechanism is provided between each two adjacent electromagnetic adsorption devices. Each sheet material moving mechanism adsorbs the sheet material from bottom to top and drives the corresponding sheet material to move.

[0008] The welding jig according to the embodiment of the invention has at least the following beneficial effects: four linear pushing mechanisms and four inner positioning sensors can respectively perform preliminary positioning and movement on the four sheets, and four sheet moving mechanisms can respectively perform final positioning and movement on the four sheets. The invention can position and move the four sheets and splice them into a hollow frame. After being fixed by four electromagnetic adsorption devices, the four sheets become iron frame blanks through a welding process. The invention provides necessary technical support for the welding process of the iron frame blanks. The iron frame blanks obtained through the above process not only save materials, but also avoid the generation of flash or burrs.

[0009] According to some embodiments created by the present invention, a guide rod slider mechanism is provided at the bottom of each two adjacent electromagnetic adsorption devices, and the four guide rod slider mechanisms are overlapped and connected up and down to form a "well"-shaped linkage component, and each guide rod slider mechanism includes a plurality of guide rods and two first sliders sliding along the guide rods.

[0010] According to some embodiments created by the present invention, each of the guide rod slider mechanisms is provided with a slide rail slider mechanism at both ends, each of the slide rail slider mechanisms includes a slide rail installed on the base plate and a second slider sliding along the slide rail, and the setting direction of each slide rail is perpendicular to the setting direction of the corresponding guide rod.

[0011] According to some embodiments of the present invention, the sliding mechanism includes two screw groups and four connecting seats with threaded through holes. The two screw groups are cross-arranged, and each of the screw groups is composed of a left-handed screw and a right-handed screw rigidly connected to each other. Each of the left-handed screw and the right-handed screw is threadedly connected to the connecting seat.

[0012] According to some embodiments created by the present invention, the middle part of each guide rod slider mechanism is slidably connected to the connecting seat, the upper surface of each connecting seat is installed with the sheet material moving mechanism, and the horizontal moving direction of each sheet material moving mechanism is parallel to the setting direction of the corresponding guide rod.

[0013] According to some embodiments of the present invention, one end of each screw group is connected to a rotating device with a scale, and the rotating device drives the screw group to rotate, and the other end of each screw group is mounted on the base plate.

[0014] According to some embodiments of the present invention, one end or both ends of each screw group are provided with a locking device for locking the screw group, so that the sliding mechanism has a locking function.

[0015] According to some embodiments of the present invention, two outer side positioning sensors are provided on one side of the bottom plate, and each of the outer side positioning sensors points to one of the sheet moving mechanisms.

[0016] According to some embodiments created by the present invention, each of the linear pushing mechanisms includes a linear driving device and a pushing plate, and the linear driving device drives the pushing plate to perform linear reciprocating motion. A plurality of mutually spaced mounting holes are provided on the pushing plate, and a pushing block is connected to one of the mounting holes.

[0017] According to some embodiments of the present invention, each of the sheet moving mechanisms includes a lifting device and a horizontal moving device, the lifting device and the horizontal moving device are linked and connected, and the suction cup is provided on the top of the sheet moving mechanism.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description and in part will become apparent from the following description or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of a welding jig according to an embodiment of the invention;

[0021] Figure 2 yes Figure 1 A top view of the welding jig shown;

[0022] Figure 3 yes Figure 1 A front view of the welding jig shown;

[0023] Figure 4 It is a schematic diagram of the three-dimensional structure of the welding jig according to the embodiment of the invention when it is working;

[0024] Figure 5 yes Figure 4 A top view of the welding jig is shown.

[0025] In the accompanying drawings: 100-bottom plate, 200-electromagnetic adsorption device, 300-sliding mechanism, 320-connecting seat, 311-left-handed screw, 312-right-handed screw, 400-guide rod slider mechanism, 410-guide rod, 420-first slider, 500-slide rail slider mechanism, 510-second slider, 520-long slide rail, 210-inside positioning sensor, 600-linear pushing mechanism, 610-linear driving device, 620-pushing plate, 621-mounting hole, 622-pushing block, 710-rear sheet, 720-left sheet, 730-right sheet, 740-front sheet, 800-sheet moving mechanism, 810-suction cup, 110-outside positioning sensor, 331-scale, 330-rotating device, 340-locking device. DETAILED DESCRIPTION

[0026] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0027] In the description of the present invention, it should be understood that the descriptions involving orientation, such as up, down, front, back, left, right, etc., the orientations or positional relationships indicated are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0028] In the description of the invention, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0029] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific content of the technical solution.

[0030] like Figures 1 to 3As shown, the welding jig according to the first embodiment of the invention comprises a base plate 100 and four electromagnetic adsorption devices 200, wherein the base plate 100 is provided with a sliding mechanism 300; specifically, the sliding mechanism 300 comprises two screw rod groups and four connecting seats 320 with threaded through holes, wherein the two screw rod groups are cross-arranged, and each of the screw rod groups is composed of a left-handed screw 311 and a right-handed screw 312 which are rigidly connected to each other, and each of the left-handed screw 311 and the right-handed screw 312 is threadedly connected to the connecting seat 320.

[0031] The four electromagnetic adsorption devices 200 are rectangularly distributed on the bottom plate 100. The electromagnetic adsorption devices 200 can adsorb and fix the sheet material after being powered on, and every two adjacent electromagnetic adsorption devices 200 are linked and connected; specifically, a guide rod slider mechanism 400 is provided at the bottom of every two adjacent electromagnetic adsorption devices 200, and the four guide rod slider mechanisms 400 are overlapped and connected up and down to form a "well"-shaped linkage component, and each guide rod slider mechanism 400 includes two guide rods 410 and two first sliders 420 sliding along the guide rods 410. Two of the guide rod slider mechanisms 400 are arranged front and back and move in the front and back direction, and the other two guide rod slider mechanisms 400 are arranged left and right and move in the left and right direction. The two guide rod slider mechanisms 400 arranged front and back are located above the two guide rod slider mechanisms 400 arranged left and right, and all the first sliders 420 of the two guide rod slider mechanisms 400 arranged front and back are fixedly connected with the corresponding first sliders 420 of the two guide rod slider mechanisms 400 arranged left and right, so that the bottom of each electromagnetic adsorption device 200 is sequentially connected with two first sliders 420 from top to bottom. It can be understood that the number of guide rods 410 in each guide rod slider mechanism 400 can also be one, three, etc., but is not limited thereto. In order to enable each of the guide rod slider mechanisms 400 to slide along the base plate 100, slide rail slider mechanisms 500 are provided at both ends of each of the guide rod slider mechanisms 400, and each of the slide rail slider mechanisms 500 includes a slide rail installed on the base plate 100 and a second slider 510 sliding along the slide rail, and the setting direction of each slide rail is perpendicular to the setting direction of the corresponding guide rod 410; it should be further explained that since the two guide rod slider mechanisms 400 set in the same direction have the same sliding direction along the base plate 100, the four slide rails on the two ends of the two guide rod slider mechanisms 400 set in the same direction are respectively merged into two long slide rails 520 parallel to each other.

[0032] Through the sliding mechanism 300, the four electromagnetic adsorption devices 200 are all slidably connected to the base plate 100; specifically, the middle part of each guide rod slider mechanism 400 is slidably connected to the connecting seat 320, that is, two screw rod groups are commonly provided between the four electromagnetic adsorption devices 200. When the user rotates one of the screw groups, since each of the screw groups is composed of a left-handed screw 311 and a right-handed screw 312 that are rigidly connected to each other, the two connecting seats 320 that are relatively set can move outward or inward at the same time. Since the middle part of each guide rod slider mechanism 400 is slidably connected to the connecting seat 320, when the two connecting seats 320 move outward or inward at the same time, the two electromagnetic adsorption devices 200 on both sides of the base plate 100 can follow the two connecting seats 320 to move outward or inward at the same time; that is, when the user rotates the left and right screw groups, the two electromagnetic adsorption devices 200 on the left and right sides of the base plate 100 can move outward or inward at the same time, and when the user rotates the front and back screw groups, the two electromagnetic adsorption devices 200 on the front and back sides of the base plate 100 can move outward or inward at the same time, which is convenient for the user to adjust the relative positions of the four electromagnetic adsorption devices 200.

[0033] like Figure 4 and Figure 5 As shown, in order to position and move four sheets, the two inner adjacent sides of each electromagnetic adsorption device 200 are provided with an inner positioning sensor 210 for detecting the position of the sheet and a linear pushing mechanism 600 for pushing the sheet toward the inner positioning sensor 210, and all the inner positioning sensors 210 are arranged near the middle of the bottom plate 100; specifically, each linear pushing mechanism 600 includes a linear driving device 610 and a pushing plate 620, and the linear driving device 610 includes but is not limited to a cylinder, a hydraulic cylinder, a linear motor or an electric push rod. The linear driving device 610 in this embodiment is preferably a cylinder, and the linear driving device 610 drives the pushing plate 620 to perform linear reciprocating motion. In order to enable the invention to adapt to sheets of different sizes, the pushing plate 620 is provided with a plurality of mutually spaced mounting holes 621, and one of the mounting holes 621 is connected to a pushing block 622 for pushing the sheet to move, and the user can install the position of the pushing block 622 according to the size specifications of the sheet. It should be further explained that the four sheets are divided into a rear sheet 710 located at the rear side, a left sheet 720 located at the left side, a right sheet 730 located at the right side, and a front sheet 740 located at the front side.

[0034] like Figure 1As shown, in order to further position and move the four sheets, a sheet moving mechanism 800 is installed on the upper surface of each connecting seat 320, and the horizontal moving direction of each sheet moving mechanism 800 is parallel to the setting direction of the corresponding guide rod 410; specifically, each sheet moving mechanism 800 includes a lifting device and a horizontal moving device, and the lifting device and the horizontal moving device both include but are not limited to a cylinder, a hydraulic cylinder, a linear motor or an electric push rod. The lifting device and the horizontal moving device in this embodiment are preferably cylinders, and the lifting device and the horizontal moving device are linked to each other, so that each sheet moving mechanism 800 can move up and down and horizontally. A suction cup 810 is provided on the top of the sheet moving mechanism 800. When the lifting device moves upward, the suction cup 810 absorbs the corresponding sheet. Driven by the horizontal moving device, the suction cup 810 can drive the corresponding sheet to move horizontally, so that each horizontal moving device can absorb the sheet from bottom to top and drive the corresponding sheet to move.

[0035] like Figure 4 As shown, in order to further position the front and rear sheets so that the left edges of the front and rear sheets are aligned, two outer positioning sensors 110 are provided on the left side of the bottom plate 100. The two outer positioning sensors 110 are arranged at intervals in front and behind. The two outer positioning sensors 110 are located outside the four electromagnetic adsorption devices 200. Each outer positioning sensor 110 points to one of the sheet moving mechanisms 800, that is, the two sheet moving mechanisms 800 are used to move the corresponding sheet to the corresponding outer positioning sensor 110. Specifically, the inner positioning sensor 210 and the outer positioning sensor 110 are proximity switches or photoelectric sensors. It can be understood that the two outer positioning sensors 110 can also be arranged on the right side of the bottom plate 100, so that the right edges of the front and rear sheets are aligned.

[0036] like Figures 1 to 3 As shown, in some embodiments of the invention, in order to conveniently record the relative positions of the four electromagnetic adsorption devices 200, one end of each of the screw rod groups is connected to a rotating device 330 with a scale 331, and the rotating device 330 drives the screw rod group to rotate. The rotating device 330 is specifically a hand-cranked wheel, and the other end of each of the screw rod groups is mounted on the bottom plate 100. The scale 331 is used to record the relative positions of the four electromagnetic adsorption devices 200. If the size specifications of the four sheets to be positioned and moved next time are consistent with the size specifications of the four sheets to be positioned and moved last time, the user only needs to adjust the hand-cranked wheel to the previously recorded scale 331 to adjust the relative positions of the four electromagnetic adsorption devices 200.

[0037] In addition, in order to lock the sliding mechanism 300, locking devices 340 for locking the screw groups are provided at both ends of each screw group, and each locking device 340 includes two clamping blocks and a locking rod capable of controlling the relative movement of the two clamping blocks, and the two clamping blocks are sleeved outside the corresponding screw group. It can be understood that since the screw group is composed of a left-handed screw 311 and a right-handed screw 312 rigidly connected to each other, the locking device 340 provided at one end of the screw group can also lock the screw group.

[0038] like Figure 5 As shown, through the above arrangement, the steps of positioning and moving the four sheets created by the present invention are as follows:

[0039] 1. Rotate the two hand-cranked wheels according to the size specifications of the four sheets so that the relative positions of the four electromagnetic adsorption devices 200 are at the preset positions, and then place the four sheets on the four electromagnetic adsorption devices 200 in a rectangular distribution;

[0040] 2. Control the two linear material pushing mechanisms 600 at the rear side so that the push blocks 622 of the two linear material pushing mechanisms 600 push the rear sheet 710 forward toward the two inner positioning sensors 210 at the rear side. When the two inner positioning sensors 210 sense the rear sheet 710, the two linear material pushing mechanisms 600 stop moving. Then, the sheet moving mechanism 800 at the rear side absorbs the rear sheet 710 from bottom to top and drives the rear sheet 710 to move leftward toward the outer positioning sensor 110 at the rear side. When the outer positioning sensor 110 senses the rear sheet 710, the sheet moving mechanism 800 stops moving.

[0041] 3. Control the two linear material pushing mechanisms 600 on the left side so that the push blocks 622 of the two linear material pushing mechanisms 600 push the left sheet 720 rightward toward the two inner positioning sensors 210 on the left side. When the two inner positioning sensors 210 sense the left sheet 720, the two linear material pushing mechanisms 600 stop moving. At this time, the left edge of the left sheet 720 is aligned with the left edge of the rear sheet 710. Then, the sheet moving mechanism 800 on the left side absorbs the left sheet 720 from bottom to top and drives the left sheet 720 to move backward toward the rear sheet 710, so that the rear edge of the left sheet 720 abuts against the front edge of the rear sheet 710.

[0042] 4. Control the two linear material pushing mechanisms 600 on the right side so that the push blocks 622 of the two linear material pushing mechanisms 600 push the right sheet 730 to the left toward the two inner positioning sensors 210 on the right side. When the two inner positioning sensors 210 sense the right sheet 730, the two linear material pushing mechanisms 600 stop moving. At this time, the right edge of the right sheet 730 is aligned with the right edge of the rear sheet 710. Then, the sheet moving mechanism 800 on the right side absorbs the right sheet 730 from bottom to top and drives the right sheet 730 to move backward toward the rear sheet 710, so that the rear edge of the right sheet 730 abuts against the front edge of the rear sheet 710.

[0043] 5. Control the two linear pusher mechanisms 600 located at the front side so that the push blocks 622 of the two linear pusher mechanisms 600 push the front sheet 740 backward toward the two inner positioning sensors 210 located at the front side. When the two inner positioning sensors 210 sense the front sheet 740, the two linear pusher mechanisms 600 stop moving. At this time, the rear edge of the front sheet 740 is close to the front edge of the left sheet 720 and the front edge of the right sheet 730 respectively. Then, the sheet moving mechanism 800 located at the front side absorbs the front sheet 740 from bottom to top and drives the front sheet 740 to move leftward toward the outer positioning sensor 110 located at the front side. When the outer positioning sensor 110 senses the front sheet 740, the sheet moving mechanism 800 stops moving, so that the left edge of the front sheet 740 is aligned with the left edge of the rear sheet 710, and the right edge of the front sheet 740 is aligned with the right edge of the rear sheet 710.

[0044] 6. The ejection devices of all sheet moving mechanisms 800 move downward, so that all suction cups 810 are separated from the corresponding sheets. At the same time, all electromagnetic adsorption devices 200 are powered on and adsorb and fix the four sheets, providing necessary technical support for the next welding process.

[0045] It should be further explained that step 3 and step 4 can be performed simultaneously or sequentially, and the order of the two can be interchanged. In actual production, since there are certain tolerances in the size specifications of all sheets, after positioning and moving the four sheets through the above steps, it can ensure that some welds are zero-gap, but it cannot ensure that the front sheet 740 can be accurately docked with the left sheet 720 and the right sheet 730, that is, there may be welds between the three. As long as the standard tolerance of the weld is controlled within ±0.15mm, the weld can be welded by adjusting the laser welding machine (for example, laser defocusing, increasing laser power, slowing down the speed, etc.).

[0046] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A welding jig, characterized in that: include: A bottom plate (100) is provided with a sliding mechanism (300) having a locking function, the sliding mechanism (300) comprising two screw rod groups and four connecting seats (320) with threaded through holes, the two screw rod groups being arranged crosswise, each of the screw rod groups comprising a left-handed screw rod (311) and a right-handed screw rod (312) rigidly connected to each other, and each of the left-handed screw rod (311) and the right-handed screw rod (312) being threadedly connected to the connecting seat (320); Four electromagnetic adsorption devices (200) are distributed in a rectangular shape, and the bottoms of each two adjacent electromagnetic adsorption devices (200) are provided with a guide rod slider mechanism (400), and the four guide rod slider mechanisms (400) are overlapped and connected up and down to form a linkage component in a "well" shape, and each guide rod slider mechanism (400) includes a plurality of guide rods (410) and two first sliders (420) sliding along the guide rods (410); the four electromagnetic adsorption devices (200) are slidably connected to the bottom plate (100) through the sliding mechanism (300); and each electromagnetic adsorption device (200) is provided with a guide rod slider mechanism (400) on its two inner adjacent sides. An inner positioning sensor (210) for detecting the position of a sheet and a linear pushing mechanism (600) for pushing the sheet toward the inner positioning sensor (210), all of the inner positioning sensors (210) are arranged near the middle of the bottom plate (100); each of the linear pushing mechanisms (600) comprises a linear driving device (610) and a pushing plate (620), the linear driving device (610) driving the pushing plate (620) to perform linear reciprocating motion, the pushing plate (620) being provided with a plurality of mutually spaced mounting holes (621), one of the mounting holes (621) being connected to a pushing block (622); Four sheet material moving mechanisms (800) with suction cups (810), one sheet material moving mechanism (800) being provided between each two adjacent electromagnetic adsorption devices (200), each sheet material moving mechanism (800) adsorbing the sheet material from bottom to top and driving the corresponding sheet material to move; two outer positioning sensors (110) being provided on one side of the bottom plate (100), each outer positioning sensor (110) pointing to one sheet material moving mechanism (800) respectively; the middle part of each guide rod slider mechanism (400) being slidably connected to the connecting seat (320), the upper surface of each connecting seat (320) being mounted with the sheet material moving mechanism (800), and the horizontal moving direction of each sheet material moving mechanism (800) being parallel to the setting direction of the corresponding guide rod (410).

2. The welding jig according to claim 1, characterized in that: Both ends of each guide rod slider mechanism (400) are provided with a slide rail slider mechanism (500), each slide rail slider mechanism (500) comprises a slide rail mounted on the base plate (100) and a second slider (510) sliding along the slide rail, and the setting direction of each slide rail is perpendicular to the setting direction of the corresponding guide rod (410).

3. The welding jig according to claim 1, characterized in that: One end of each screw rod group is connected to a rotating device (330) with a scale (331), and the rotating device (330) drives the screw rod group to rotate. The other end of each screw rod group is mounted on the bottom plate (100).

4. The welding jig according to claim 3, characterized in that: One end or both ends of each screw group are provided with a locking device (340) for locking the screw group, so that the sliding mechanism (300) has a locking function.

5. The welding jig according to claim 1, characterized in that: Each of the sheet material moving mechanisms (800) comprises a lifting device and a horizontal moving device, the lifting device and the horizontal moving device are linked and connected, and the suction cup (810) is provided on the top of the sheet material moving mechanism (800).

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