Rotary positioning device for machining holes in adjacent end faces of plates

Abstract

The invention discloses a rotary positioning device for machining adjacent end face holes of a plate, which comprises a mounting seat and a rotary limiting mechanism, the rotary limiting mechanism comprises a rotary flange, a left positioning piece and a right positioning piece, and one end of the left positioning piece and one end of the right positioning piece are intersected to form a V-shaped mounting cavity; adjusting assemblies used for clamping and positioning a plate to be machined are symmetrically arranged on the left positioning piece and the right positioning piece. The limiting seat is fixedly arranged on the mounting seat, an upper limiting piece is arranged at the top end of the limiting seat, and a lower limiting piece is arranged at the bottom of the limiting seat; and the rotation limiting mechanism is rotated, so that the left positioning piece is connected with the upper limiting piece, or the right positioning piece is connected with the lower limiting piece, positioning of the plate is achieved, and therefore the adjacent end face holes of the plate are machined. The device not only can realize rapid clamping of the plate, but also can meet rapid switching and adjustment of the plate in two different machining directions. Holes in the adjacent end faces of a plate can be machined through one-time clamping of one tool, and operability and efficiency are remarkably improved.

Description

Technical Field

[0001] This invention pertains to processing positioning devices, specifically a rotary positioning device for machining adjacent end holes in sheet metal. Background Technology

[0002] In the process of machining various holes on sheet products, the sheet first needs to be fixed, and then the hole is drilled at the preset position. However, it is difficult to machine end holes for irregularly shaped sheets in the thickness direction of the sheet, and the processing efficiency is usually low. This is because it is inconvenient to clamp irregularly shaped sheets and it is difficult to accurately position the hole.

[0003] like Figure 1 The forklift mast mounting plate 9 shown is a right triangle formed by connecting the first straight side 91 and the second straight side 92. An arc-shaped structure for positioning the mast and forklift axle housing is provided on the opposite side of the right angle. Fixing holes 94 are provided at the ends of the first straight side 91 and the second straight side 92, which are located in the same horizontal direction and are mainly used to install axle caps, thereby fixing the forklift mast and forklift axle housing. An oil hole 93 for lubricating the rotation of the mast is provided at the outer end of the second straight side 92.

[0004] Because the fixing holes 94 and oil holes 93 in the mounting plate 9 are not oriented in the same direction, the mounting plate 9 needs to be fixed and machined separately when machining the fixing holes 94 and oil holes 93. Specifically, after fixing the mounting plate 9, the fixing holes 94 are machined; then the mounting plate 9 is rotated and fixed again before machining the oil holes 93. Therefore, current machining technology requires two sets of positioning fixtures to fix the mounting plate separately, and multiple positioning and clamping result in high costs and low work efficiency. Moreover, after multiple positioning and clamping, the relative positions of the holes are not easily positioned accurately. In addition, because the mounting plate has an irregular shape, existing fixtures are not suitable for fixing and positioning this plate. Summary of the Invention

[0005] To address the aforementioned problems, this invention provides a rotary positioning device for machining adjacent end holes in sheet metal. This device not only enables rapid positioning and clamping of the sheet metal but also allows for posture adjustment during machining of end holes in different directions, thus solving the problems of low sheet metal clamping efficiency and difficulty in adjusting posture in different directions.

[0006] The specific technical solution of the present invention is as follows:

[0007] This application provides a rotary positioning device for machining adjacent end holes of a sheet metal, including a mounting base, on which a rotary limiting mechanism is rotatably mounted. The rotary limiting mechanism includes a rotary flange rotatably connected to the mounting base, and left and right positioning members are fixed on the rotary flange. One end of the left and right positioning members intersects and forms a V-shaped mounting cavity. The left and right positioning members located in the V-shaped mounting cavity are symmetrically provided with adjustment components for clamping and positioning the sheet metal to be machined. It also includes a limiting seat fixed on the mounting base, with an upper limiting component at the top and a lower limiting component at the bottom; by rotating the rotary limiting mechanism, the left positioning component is connected to the upper limiting component, or the right positioning component is connected to the lower limiting component, so as to position the plate and thus process the adjacent end holes.

[0008] In one optional embodiment, the mounting base includes a vertically connected support and a base, a rotation limiting mechanism is mounted on the support, and a limiting seat is fixed on the base; the support has a shaft mounting hole, and a support roller is mounted on the support located on the outer periphery of the shaft mounting hole; the rotary flange is rotatably connected to the support via a rotary shaft and contacts the support roller.

[0009] In one alternative embodiment, there are at least four support rollers, two of which are mounted on the central vertical line of the shaft mounting hole; the other two are mounted at equal intervals on both sides of the lower support roller; and / or, The support roller includes a support shaft and a support wheel movably sleeved on the support shaft. Both ends of the support shaft are fixedly installed on the support by fixed limiting members.

[0010] In one alternative embodiment, the adjusting assembly includes a partition and a sliding pressure plate, wherein the partition is fixed on the left positioning member, and the sliding pressure plate is movably disposed between the left positioning member and the partition; the sliding pressure plate and the partition cooperate to clamp and position the plate.

[0011] In one optional embodiment, the partition includes a partition body, and a pressure plate limiting groove is formed on the bottom end face of the partition body for the sliding pressure plate to pass through; and / or, The sliding pressure plate includes a base plate and end plates that are vertically fixed at both ends of the base plate. One end plate has a top head fixed on its inner side wall, and the other end plate has a tightening adjustment component movably connected to it. A clamping groove for placing the plate is formed between the partition plate and the two end plates. The size of the clamping groove is adjusted by adjusting the tightening adjustment component, thereby achieving clamping and positioning of the plate.

[0012] In one optional embodiment, the left positioning component includes a left support plate fixed to the rotary flange, a left positioning groove for placing one end of the plate is provided on the inner side wall of the left support plate, and clearance holes for drilling holes in the plate are provided on both sides of the left positioning groove; a left positioning block is fixed on the outer side wall of the left support plate. The right positioning component includes a right support plate fixed on the rotary flange, a right positioning groove for placing the other end of the plate is provided on the inner side wall of the right support plate, and a right positioning block is fixed on the outer side wall of the right support plate.

[0013] In one optional embodiment, a left pad is fixed on the inner wall of the left support plate, and a right pad is fixed on the inner wall of the right support plate. A handle is installed on the end of both the left and right support plates away from the slewing flange.

[0014] In one optional embodiment, the limiting seat includes a vertical mounting seat and a horizontal mounting seat with the same structure and connected together. The vertical mounting seat is movably connected to the upper limiting member, and the horizontal mounting seat is movably connected to the lower limiting member. The vertical mounting base includes a mounting base body, and a groove connecting the adjacent sidewall is provided at one of the top corners of the mounting base body.

[0015] In one optional embodiment, the upper limit member includes an upper limit support rod and an upper movable screw mounted on the mounting base body. One end of the upper limit support rod is fixed to the mounting base body, and one end of the upper movable screw is hinged in a groove and can rotate freely along the opening end of the groove. The other end of the upper movable screw is engaged with the rotary limiting mechanism and then fixed with an upper locking nut.

[0016] In one optional embodiment, through pin holes are provided on the opposite sidewalls of the groove for installing the upper limit pin; one end of the upper movable screw is movably sleeved on the upper limit pin and rotates around the upper limit pin; the top surface of the mounting base body is also provided with mounting holes for installing the upper limit support rod. The lower limit component and the upper limit component have the same structure.

[0017] In one optional embodiment, the upper movable screw includes a screw body and a ring fixed to one end of the screw body, with a through hole in the middle of the ring passing through the upper limit pin.

[0018] In an optional embodiment, a leveling pin is also included, one end of which passes sequentially through the slewing flange and the mounting base to correct the position of the slewing limit mechanism.

[0019] The present invention has the following beneficial effects: This application provides a rotary positioning device for machining adjacent end holes of a sheet metal. The solution achieves the adjustment of the sheet metal posture through a rotary limiting mechanism rotatably mounted on the mounting base. The left and right positioning parts fixed on the rotary flange intersect to form a V-shaped mounting cavity to provide a positioning reference for the sheet metal. The adjustment components symmetrically arranged in the V-shaped mounting cavity complete the clamping and positioning of the sheet metal, thereby avoiding multiple clamping operations.

[0020] This application connects the upper limit component at the top of the limit seat and the lower limit component at the bottom to the left or right positioning component respectively, thereby enabling the rotary limit mechanism to quickly lock in different processing directions and ensuring the positioning accuracy when machining adjacent end faces.

[0021] Therefore, the device of this application can not only quickly clamp plates, but also simultaneously clamp two plates for hole processing. Furthermore, the device can quickly switch between two different processing directions of the plate without requiring multiple clamping operations with multiple toolings. A single clamping operation with one tooling is sufficient to process adjacent end faces of the plate, significantly improving operability and overcoming the need to change fixtures in processing multi-directional end faces of irregularly shaped plates, thus significantly improving clamping efficiency. Moreover, this application uses a leveling pin to position the rotary flange, thereby correcting the position of the rotary limiting mechanism and improving positioning accuracy. Attached Figure Description

[0022] The present invention will now be described in further detail with reference to the accompanying drawings: Figure 1 This is a schematic diagram of the structure for mounting the support plate in this invention. Figure 2 This is a schematic diagram of the rotary positioning device in the present invention. Figure 1 , Figure 3 for Figure 2 A schematic diagram of the structure after the upper limit component and the rotary limit mechanism are separated. Figure 4 This is a schematic diagram of the rotary positioning device in the present invention. Figure 2 , Figure 5 Schematic diagram of the rotary positioning device and support plate assembly Figure 1 , Figure 6 Schematic diagram of the rotary positioning device and support plate assembly Figure 2 , Figure 7 This is a schematic diagram of the mounting base in this invention. Figure 8 This is a schematic diagram of the support roller in this invention. Figure 9 This is a schematic diagram of the rotary limiting mechanism in this invention. Figure 10 for Figure 9 Schematic diagram of the connection between the left and right support plates and the slewing flange. Figure 11 This is a schematic diagram of the partition structure in this invention. Figure 12 This is a schematic diagram of the sliding pressure plate in this invention. Figure 13 This is a schematic diagram of the limiting seat in the present invention. Figure 14 This is a schematic diagram of the upper movable screw in this invention. Figure 15 This is a schematic diagram of the flat pin structure in this invention.

[0023] In the picture: 1-Mounting base, 11-Support, 12-Shaft mounting hole, 13-Support roller, 131-Support shaft, 132-Hole, 133-Support wheel, 14-Base, 15-Reference hole, 16-Fixing limit component; 2-Slewing limit mechanism; 21-Slewing flange; 211-Pin hole; 22-Slewing shaft; 23-Right positioning component; 231-Right support plate; 232-Right positioning groove; 233-Right positioning block; 234-Right pad block; 235-Right handle; 24-Left positioning component; 241-Left support plate; 242-Left positioning groove; 243-Left positioning block; 244-Left pad block; 245-Left handle; 246-Allowing hole; 3-Partition plate, 31-Partition plate body, 32-Installation and positioning part, 33-Pressure plate limiting groove; 4-Sliding pressure plate, 41-Base plate, 42-End plate, 43-Tightening adjustment piece, 44-Top head; 5-Limit seat, 51-Mounting plate, 52-Horizontal mounting seat, 53-Vertical mounting seat, 54-Groove, 55-Pin hole, 56-Threaded hole, 57-Mounting hole; 6-Upper limit switch, 61-Upper limit switch support rod, 62-Upper movable screw, 621-Screw body, 622-Ring, 623-Through hole; 63-Upper locking nut, 64-Upper limit pin; 7-Lower limit component, 71-Lower limit support rod, 72-Lower movable screw, 73-Lower locking nut, 74-Lower limit pin; 8-Leveling pin, 81-Basis hole positioning end, 82-Pin hole positioning end, 83-Retaining ring, 84-Handheld end; 9- Mounting support plate, 91- First straight edge, 92- Second straight edge, 93- Oil filling hole, 94- Fixing hole. Detailed Implementation

[0024] The present application will now be described in detail with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in the embodiments of the present application can be combined with each other.

[0025] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," "fixing," and "fixed installation," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0026] like Figure 1 The image shows a forklift mast mounting plate 9, which is a right triangle formed by connecting a first straight side 91 and a second straight side 92. An arc-shaped structure for positioning the mast and forklift axle housing is provided on the opposite side of the right angle. Fixing holes 94 are provided at the ends of the first straight side 91 and the second straight side 92, which are located in the same horizontal direction and are mainly used to install axle caps, thereby fixing the forklift mast and forklift axle housing. An oil hole 93 for lubricating the rotation of the mast is provided at the outer end of the second straight side 92.

[0027] See Figure 2-6 This application provides a rotary positioning device for machining adjacent end holes of a sheet metal, including a mounting base 1. A rotary limiting mechanism 2 is rotatably mounted on the mounting base 1. The rotary limiting mechanism 2 includes a rotary flange 21 rotatably connected to the mounting base 1. Left and right positioning members are fixed on the rotary flange 21, and one end of the left and right positioning members intersects to form a V-shaped mounting cavity. The bottom ends of the left and right positioning members can be connected as one piece or separated, depending on the actual situation. The included angle of this V-shaped mounting cavity is determined according to the shape of the sheet metal to be processed. For example, it is used for clamping... Figure 1 The mounting plate 9 has one end of the left and right positioning parts vertically connected to form a right-angled V-shaped mounting cavity, which is adapted to the right angle of the mounting plate 9.

[0028] The left and right positioning members located in the V-shaped mounting cavity are symmetrically provided with adjustment components for clamping and positioning the plate to be processed; and a limiting seat 5 is fixed on the mounting base 1. The top of the limiting seat 5 is provided with an upper limiting member 6 and the bottom is provided with a lower limiting member 7. By rotating the rotary limiting mechanism 2, the left positioning member 24 is connected to the upper limiting member 6, or the right positioning member 23 is connected to the lower limiting member 7, so as to position the plate and thus process the adjacent end holes.

[0029] In this embodiment, the sheet metal to be processed is placed in the V-shaped mounting cavity formed by the slewing flange and the left and right positioning parts, and can rotate together with the slewing flange. When it rotates to a certain position, the limiting seat positions the slewing limiting mechanism, thereby positioning the sheet metal and processing its adjacent end holes.

[0030] In another embodiment, the mounting base 1 is as follows: Figure 7 As shown, it includes a vertically connected support 11 and a base 14. A rotation limiting mechanism 2 is installed on the support 11, and a limiting seat 5 is fixed on the base 14. A shaft mounting hole 12 is provided on the support 11, and a support roller 13 is installed on the support 11 located on the outer periphery of the shaft mounting hole 12.

[0031] In this embodiment, the mounting base 1 has an overall "L"-shaped structure, consisting of a vertically arranged support 11 and a horizontally arranged base 14 vertically and fixedly connected. The support 11 is used to bear and support the rotary limiting mechanism 2, and the base 14 is used to provide a stable foundation and install the limiting seat 5. The two achieve functional partitioning in space, avoiding structural interference or force coupling between the rotary moving parts and the limiting constraint parts. The support 11 and the base 14 can be connected by welding, bolts, or integral casting; their connection angle is 90°, which can also be adjusted according to actual working conditions.

[0032] In another embodiment, the slewing flange 21 is rotatably connected to the support 11 via the slewing shaft 22 and contacts the support roller 13.

[0033] The shaft mounting hole 12 is opened in the middle of the support 11 and is a through hole. Its axis extends along the thickness direction of the support 11. The shaft mounting hole 12 is used to pass through the rotary shaft 22 and provide a rotation center reference for the rotary flange 21. The diameter of the shaft mounting hole 12 can be set according to the outer diameter of the rotary shaft 22.

[0034] Among them, the support roller 13 is as follows Figure 8 As shown, it includes a support shaft 131 and a support wheel 133 movably sleeved on it. The support shaft 131 has a hole 132, and a fixing limiting member 16 is used to fix it to the support plate 11. In this embodiment, the fixing limiting member 16 can be a bolt. The outer surface of the support wheel 133 is in contact with the side of the slewing flange 21 to share the radial load during the slewing process and improve the rotational stability.

[0035] The base 14 has mounting holes for fixing the limit seat 5 with bolts; the support 11 of the mounting seat 1 also has reference holes 15 for cooperating with the leveling pin 8 to achieve precise angular positioning of the rotary limit mechanism 2.

[0036] Specifically, the support rollers 13 are mounted on the support 11 and arranged around the outer periphery of the shaft mounting hole 12. The number, distribution, and installation method of the support rollers 13 can be adaptively configured according to the size, weight, and processing load of the rotary flange 21; for example, four, six, or eight. In this embodiment, four support rollers 13 are provided, two of which are installed on the central vertical line of the shaft mounting hole 12; the other two are installed at equal intervals on both sides of the lower support roller 13. The support rollers 13 located on the upper side of the support plate 11 are to ensure the flatness of the rotary limiting mechanism installation, while the three support rollers 13 located on the lower side are arranged circumferentially with a 45° interval between them, which can effectively distribute the force of the rotary limiting mechanism 2 during processing.

[0037] Each support wheel 133 rotates freely on the support shaft 131, and its outer surface is flush with the outer surface of the rotary flange 2. Together, they distribute the weight of the rotary limiting mechanism 2 and the forces exerted during processing, ensuring the stability of the entire device and preventing vibrations that could affect the machining accuracy of the holes. Furthermore, since the support wheels 133 can rotate along the support shaft 131, the rotational flexibility of the rotary limiting mechanism 2 is improved.

[0038] That is, the outer circumferential surface of the support roller 133 of each support roller 13 is in contact with the side of the slewing flange 21 and can roll along its circumference; the material of the support roller 133 is bearing steel, engineering plastic or copper alloy, and the contact between the support roller 133 and the slewing flange 21 is line contact or small area surface contact.

[0039] In this embodiment, the support rollers 13 are arranged around and contact the side of the slewing flange 21, which effectively distributes the processing vibration load without increasing the driving energy consumption, thereby improving the rigidity and smoothness of the machine. The synergistic effect of the slewing shaft 22 and the support rollers 13 enables the slewing limit mechanism 2 to complete precise and labor-saving posture switching under manual operation, meeting the multi-station rapid positioning requirements for processing adjacent end holes of the sheet metal.

[0040] Furthermore, four or more support rollers 13 form a multi-point constraint support for the slewing flange 21. Among them, the two support rollers 13 located on the vertical line of the center of the shaft mounting hole 12 mainly bear the vertical static load and dynamic cutting reaction force, significantly reducing the stress of single-point support. The other two support rollers 13 arranged at equal intervals on both sides below together with the former form a stable triangular support pattern, which effectively suppresses overturning and torsional deformation when the slewing limiting mechanism 2 is subjected to eccentric torque or lateral force. The support wheel 133 is movably sleeved on the support shaft 131 and can roll synchronously during the rotation of the slewing flange 21, greatly reducing the sliding friction resistance and improving the smoothness of the slewing action and the repeatability of the positioning accuracy. The support shaft 131 is rigidly connected to the support 11 through the fixed limiting member 16, ensuring the structural rigidity and long-term reliability of the entire support system.

[0041] The rotation limit mechanism 2 uses the rotary flange 21 as the core load-bearing component. The rotary flange 21 is a disc-shaped metal component with a rotary shaft 22 fixedly installed in the center. The rotary shaft 22 is rotatably connected to the support 11 of the mounting base 1. At least two pin holes 211 are provided on the rotary flange 21 along the circumferential direction, which are used to cooperate with the reference hole 15 on the mounting base 1 to insert the leveling pin 8 to achieve its attitude calibration.

[0042] A left positioning member 24 and a right positioning member 23 are fixedly provided on one side of the slewing flange 21. Both are plate-shaped structures, with their inner ends fixed to the slewing flange 21 and their bottom ends close to each other and intersecting to form a V-shaped mounting cavity. The included angle of the V-shaped mounting cavity is 60°, 90° or 120°, where 90° means that one end of the left and right positioning members is vertically connected to form a right-angled V-shaped mounting cavity to match the right-angle structure formed by the first straight side 91 and the second straight side 92 of the forklift mast mounting plate 9. The opening of the V-shaped mounting cavity faces the operator's side, which is convenient for inserting and removing plates. The left and right positioning members are provided with a left handle 245 and a right handle 235 at the ends away from the slewing flange 21, respectively, for manually rotating the slewing limit mechanism 2.

[0043] In another embodiment, such as Figure 9-10 As shown, the left positioning component 24 includes a left support plate 241 fixed to the rotary flange 21. A left positioning groove 242 is formed on the inner wall of the left support plate 241 for embedding and limiting one end of the plate material. Symmetrical clearance holes 246 are formed on both sides of the left positioning groove 242, allowing the cutting tool to pass through when machining holes in direction two, thus avoiding interference. A left positioning block 243 is fixed on the outer wall of the left support plate 241, with a flat bottom surface, for engaging with the end face of the upper limit component 6 to achieve attitude locking in direction one.

[0044] The clearance holes 246 are two symmetrical circular through holes opened on both sides of the left positioning groove 242. Their axes are parallel to the surface of the left support plate 241 and perpendicular to the length direction of the left positioning groove 242. The center distance between the two clearance holes 246 can be set according to the distribution position of the oil hole 93 on the second straight edge 92 of the plate. The opening position of the clearance holes 246 should ensure that the drill bit can completely pass through without colliding with the left support plate 241 when machining the oil hole 93 in the second orientation.

[0045] The left positioning block 243 is a protruding block fixed to the outer wall of the left support plate 241. Its main body is a cuboid structure, and a U-shaped opening groove is provided on the side facing the limiting seat 5. The bottom surface of the left positioning block 243 is a flat reference surface. In the first orientation, it is in contact with the end face of the upper limit support rod 61, and in the second orientation, it is away from it.

[0046] The right support plate 231 and the left support plate 241 are symmetrically arranged, forming a right-angled V-shaped mounting cavity with a 90° angle relative to the center of the slewing flange 21. Specifically, the right positioning component 23 includes a right support plate 231 fixed to the slewing flange 21. A right positioning groove 232 is provided on the inner wall of the right support plate 231 for embedding and limiting the other end of the plate. A right positioning block 233 is fixed on the outer wall of the right support plate 231, with a flat bottom surface, for cooperating with the end face of the lower limiting component 7 to achieve orientation locking in the second direction.

[0047] The depth and width of the left and right positioning grooves 232 and 242 can be adapted to the plate to be processed; the left and right positioning blocks 233 and 243 are connected to the corresponding left and right support plates by welding or bolting, and their ends are provided with U-shaped opening grooves to facilitate connection with the upper and lower limit components.

[0048] The left handle 245 is installed on the outer wall of the left support plate 241 away from the slewing flange 21, and the right handle 235 is installed on the outer wall of the right support plate 231 away from the slewing flange 21. Both handles are positioned near the centerline of their respective support plate ends and extend horizontally outwards, facilitating hand gripping and force application. The handles are cylindrical, flat, or L-shaped with anti-slip textures. The handles are positioned away from the center of the slewing shaft 22, creating a longer lever arm. Under the same force, this significantly reduces the operating force required for rotation, improving posture switching efficiency and operational stability.

[0049] That is, when the rotary limit mechanism 2 is in a certain orientation (e.g.) Figure 2 As shown), the left positioning block 243 engages with the upper limit component 6 to complete positioning and locking; then the mounting plate 9 is installed into the left and right positioning slots respectively, at which point the fixing hole 94 can be machined in the V-shaped mounting cavity; when rotated to the second orientation (as shown) Figure 4 As shown), the right positioning block 243 is engaged with the lower limit piece 7, and the oil hole 93 can be processed through the clearance hole 246, thereby completing the high-precision and high-efficiency processing of holes in different directions at adjacent ends of the plate in one clamping.

[0050] This embodiment, while maintaining the original V-shaped mounting cavity and adjustment component functions, adds a left pad 244 and a right pad 234. This provides adjustable, replaceable, and buffered support conditions for the actual contact reference surfaces at both ends of the plate within the left and right positioning grooves 242 and 232, effectively compensating for manufacturing and assembly errors and improving the consistency of repeated positioning. Simultaneously, by configuring left and right handles 245 and 235 at the ends of the left support plate 241 and right support plate 231 respectively, human-machine operability is significantly improved. This transforms the posture switching of the rotary limit mechanism 2 from requiring multiple people or lever tools to being efficiently completed by a single person using only their hands, shortening the clamping cycle, reducing labor intensity, and enhancing operational safety.

[0051] In another embodiment, the adjustment components are symmetrically arranged in the V-shaped mounting cavities on the left and right positioning members, respectively mounted on the left positioning member 24 and the right positioning member 23. Specifically, the adjustment components include a partition 3 and a sliding pressure plate 4; taking the left positioning block 24 as an example: the partition 3 is fixed in the left positioning groove 242 of the left positioning member 24, and the sliding pressure plate 4 is movably disposed between the left positioning member 24 and the partition 3; the sliding pressure plate 4 cooperates with the partition 3 to clamp and position the plate material placed in the V-shaped mounting cavity.

[0052] The right positioning component 23 is also equipped with a partition 3 and a sliding pressure plate 4 with the same structure to achieve symmetrical clamping on the left and right.

[0053] like Figure 11 As shown, the partition 3 includes a partition body 31, and a pressure plate limiting groove 33 is provided on its bottom end surface. The bottom plate 41 of the sliding pressure plate 4 is embedded in the groove and can slide along the length of the groove. The partition body 31 located on both sides of the pressure plate limiting groove 33 respectively forms an installation positioning part 32. The installation positioning part 32 can be fixed in the left and right positioning grooves 232 and 242 with bolts to realize the fixation of the partition 3.

[0054] like Figure 12 As shown, the sliding pressure plate 4 includes a base plate 41 and end plates 42 that are vertically fixed to both ends of the base plate 41. One end plate 42 has a top head 44 fixed on its inner side wall, and the other end plate 42 has a tightening adjustment member 43 movably connected to it.

[0055] Specifically, a clamping groove is formed between the partition 3 and the two end plates 42. By screwing in or out the tightening adjustment member 43, the end plates 42 are moved, thereby changing the width of the clamping groove and achieving adaptive clamping for plates of different thicknesses.

[0056] Specifically, the partition 3 is fixed to the inner wall of the left support plate 241 by screws or welding. Its installation position is above or to the side of the left positioning groove 242, without interfering with the reference positioning function of the left positioning groove for the end of the plate. The structure of the partition 3 is an inverted "U" shape, including the partition body 31 and the pressure plate limiting groove 33 extending downward from its bottom end. The pressure plate limiting groove 33 is vertically continuous, and its opening faces the left positioning member 24. It is used to accommodate and guide the bottom plate 41 of the sliding pressure plate 4. The width of the pressure plate limiting groove 33 is greater than the thickness of the bottom plate 41 to ensure that the bottom plate 41 can slide smoothly in the groove in the vertical direction, while avoiding lateral shaking. The thickness, height and material of the partition body 31 can be set according to the actual load-bearing requirements. This application embodiment does not make any special limitations on this.

[0057] The sliding pressure plate 4 is U-shaped, including a horizontally arranged base plate 41 and end plates 42 vertically fixed to both ends of the base plate 41. The base plate 41 is embedded and slidably fitted into the pressure plate limiting groove 33 of the partition 3, and its sliding direction is consistent with the depth direction of the left positioning groove 242. The two end plates 42 extend toward the inner wall of the left positioning member 24 and the inner wall of the partition 3, respectively, and together with the inner wall of the left positioning member 24 and the inner wall of the partition 3, they form a clamping groove for placing the plate. A top head 44 is fixedly mounted on the inner wall of one end plate 42, and a threaded through hole is opened on the other end plate 42, and a tightening adjustment component 43 is movably connected thereto. The tightening adjustment component 43 is an external hexagonal bolt, the screw part of which is screwed into the threaded through hole and can move in and out axially. The screw end faces of the top head 44 and the tightening adjustment component 43 are located on the same horizontal line to ensure that the pressure applied to both sides of the plate is symmetrical. The bottom plate 41 of the sliding pressure plate 4 and the end plate 42 can be integrally formed, or they can be combined by welding or screwing. In this embodiment, the sliding pressure plate 4 and the partition plate 3 cooperate to clamp and position the plate. Specifically, after the plate to be processed is placed in the left positioning groove 242 and pressed against the end face of the left pad 244 to complete the initial positioning, the operator tightens the top tightening adjustment component 43, so that the end face of its screw pushes the corresponding end plate 42 to move horizontally towards the partition plate 3, driving the entire sliding pressure plate 4 to slide along the pressure plate limiting groove 33 towards the inner side wall of the left positioning component 24, until the distance between the end plate 42 and the inner side wall of the left positioning component 24 is adapted to the thickness of the plate. At this time, the top head 44 and the top tightening adjustment component 43 simultaneously apply clamping force to both sides of the plate to achieve rigid constraint of the plate in the thickness direction.

[0058] The width of the clamping groove can be steplessly adjusted according to different thicknesses of the sheet material. In other optional embodiments, the sliding pressure plate 4 can also be replaced by a pneumatic or hydraulically driven floating pressure plate structure. Its driving source is connected to an external pneumatic / hydraulic station through a pipeline, and the action sequence is controlled by a solenoid valve to adapt to the integration requirements of automated production lines. The partition plate 3 can also be replaced by an adjustable reference plate with a scale, which, together with the locking mechanism, enables quick preset clamping gap.

[0059] Therefore, this embodiment utilizes partition 3 as a fixed reference surface to provide stable support, and sliding pressure plate 4 as an adjustable movable side to provide adaptive clamping force; the two work together to form an adjustable mechanical clamping structure, which expands the clamping capability of the plate side without changing the original positioning function of the left positioning member 24; it is especially suitable for irregularly shaped plates with a first straight edge 91 and a second straight edge 92, such as forklift mast mounting plate 9. Specifically, in one orientation, the sliding pressure plate 4 and partition 3 cooperate to clamp the outer sides of the first and second straight edges, and the left and right pads position the end faces of the first and second straight edges, ensuring the clamping rigidity and repeatability of the positioning during the machining of the fixing hole 94.

[0060] In another embodiment, the limiting seat 5 is fixed on the base 14 of the mounting seat 1, and its structure is as follows: Figure 13 As shown, the limiting seat 5 includes a vertical mounting seat 53 and a horizontal mounting seat 52 with the same structure and connected together. The vertical mounting seat 53 is movably connected to the upper limiting member 6, and the horizontal mounting seat 52 is movably connected to the lower limiting member 7. The vertical mounting seat 53 includes a mounting seat body, and a groove 54 communicating with the adjacent side wall is provided at one of the top corners of the mounting seat body.

[0061] The limiting seat 5 is formed by rigidly connecting a vertical mounting seat 53 and a horizontal mounting seat 52 through welding, or by integral molding. Both have identical structures, being L-shaped plates with two mutually perpendicular mounting surfaces. The vertical mounting seat 53 supports and connects the upper limiting member 6 in the vertical direction, with its mounting surface facing the upper area of ​​the rotary limiting mechanism 2; the horizontal mounting seat 52 supports and connects the lower limiting member 7 in the horizontal direction, with its mounting surface facing the lower area of ​​the rotary limiting mechanism 2.

[0062] like Figure 14 As shown, the upper movable screw 62 includes a screw body 621 and a ring 622 fixed to one end of the screw body. The through hole 623 in the middle of the ring 622 passes through the upper limit pin 64. The structure of the lower movable screw 72 is the same as that of the upper movable screw 62.

[0063] The groove 54 at one corner of the vertical mounting base 53 is a through groove with a rectangular or rounded transition, penetrating the mounting base body along the thickness direction, and forming openings on two mutually perpendicular side walls, so that the groove 54 spatially connects the two adjacent mounting surfaces at the corner; the size and shape of the groove 54 are adapted to the end structure of the upper movable screw 62 in the upper limit member 6, and are used to accommodate the ring 622 of the upper movable screw 62 and its swing trajectory around the upper limit pin 64; and ensure that the upper movable screw 62 can rotate freely about 100° around the upper limit pin 64 in the vertical plane, satisfying the movement requirements of flipping from the horizontal posture to the vertical posture and engaging with the left / right positioning blocks 233 / 243.

[0064] The horizontal mounting base 52 has the same structure as the vertical mounting base 53, and its corresponding top corner is also provided with a groove of the same structure to accommodate the lower movable screw 72 in the lower limit member 7.

[0065] This embodiment realizes the integrated and modular arrangement of the upper and lower limiting parts 6 and 7 in the upper and lower directions within a limited installation space of the limiting seat 5: the through groove 54 at the top corner provides a definite axis of rotation and sufficient swing space for the upper and lower movable screws 62 and 72, so that they can reliably complete mechanical engagement and locking with the right positioning block 233 or the left positioning block 243 on the rotary flange 21, thereby stably constraining the angular position of the rotary limiting mechanism 2 in the two processing postures of direction one and direction two.

[0066] like Figure 13As shown, in this embodiment, the limiting seat 5 also includes a mounting plate 51. The mounting plate 51 has mounting holes 57. Bolts are used to pass through the mounting holes 57 to fix the limiting seat 5 on the base 14 of the mounting seat 1, thereby achieving fixation.

[0067] The upper limit support 6 includes an upper limit support rod 61 and an upper movable screw 62. One end of the upper limit support rod 61 is threaded to a threaded hole 56 at the top of the vertical mounting base 53, which can adjust the height of the upper limit support rod 61; the other end is a flat end face. One end of the upper movable screw 62 is hinged in a groove 54 at the top corner of the vertical mounting base 53 and can rotate freely around the upper limit pin 64 in a range of about 100° from horizontal to vertical. The other end is provided with a threaded section for cooperating with the upper locking nut 63 to press the left positioning block 243.

[0068] Similarly, the lower limit component 7 includes a lower limit support rod 71 and a lower movable screw 72, which are disposed at the bottom of the horizontal mounting base 52 and are used to connect to and press the right positioning block 233.

[0069] Both the upper limit pin 64 and the lower limit pin 74 are cylindrical pins, and their lengths are set according to the depth of the groove 54. The groove 54 is an L-shaped groove that passes through the adjacent side walls of the vertical mounting base 53. The opening ends of the grooves 54 on the vertical mounting base 53 and the horizontal mounting base 52 are opposite, which facilitates the flipping and embedding of the upper and lower movable screws 62 and 72. The heights of the upper limit support rod 61 and the lower limit support rod 71 are adjustable to compensate for machining wear and assembly tolerances, ensuring that the bottom surface of the positioning block and the end face of the support rod are completely in contact.

[0070] When two boards to be processed (such as...) Figure 2 After the mounting plate 9) is placed into the V-shaped mounting cavity, its first straight edge 91 and second straight edge 92 are respectively embedded in the right positioning groove 232 and the left positioning groove 242. Clamping force is applied synchronously by the symmetrically arranged adjustment components on both sides, ensuring stable positioning of the plate within the V-shaped cavity. At this time, since the bottom surface of the left positioning block 243 is in contact with the end face of the upper limit support rod 61, flipping the movable screw 62 and tightening the locking nut 63 completes the attitude locking in direction one (e.g., ...). Figure 5 ), and then process the fixing hole 94; Then loosen the upper locking nut 63 and rotate the rotary limiting mechanism 2 clockwise so that the bottom surface of the right positioning block 233 is in contact with the end face of the lower limiting support rod 71 (e.g., Figure 4 Then rotate the lower movable screw 72 to make it enter the U-shaped groove on the right positioning block 233, and tighten the lower locking nut 73 to complete the attitude locking in direction two (e.g. Figure 6 Then, the oil hole 93 on it is machined, and at this time the clearance hole 246 provides radial clearance space for the tool.

[0071] After processing is completed, rotate the rotary limit mechanism 2 counterclockwise to bring it to the first state, then remove the mounting plate 9, install the plate to be processed, and start a new round of operation.

[0072] Throughout the entire clamping and processing process, the sheet metal does not need to be disassembled and reassembled. High-precision continuous processing of adjacent end holes can be completed with only one clamping and two rotation positioning, which significantly reduces the accumulation of clamping errors and improves processing efficiency and hole position consistency.

[0073] like Figure 14 As shown, the upper movable screw 62 includes a screw body 621 and a ring 622 fixed to one end of the screw body. The through hole 623 in the middle of the ring 622 passes through the upper limit pin 64.

[0074] Specifically, the upper movable screw 62 forms a rotating pair with the vertical mounting base 53 through the upper limit pin 64. The two ends of the upper limit pin 64 are respectively inserted into the through pin holes 55 opened on the opposite side wall of the groove 54 to achieve axial limiting. The upper movable screw 62 can reciprocate within a 100° range in the horizontal direction around the upper limit pin 64. Its rotation trajectory is limited by the geometric boundary of the opening end of the groove 54. The opening end of the groove 54 faces the rotation limiting mechanism 2, which makes it easy for the upper movable screw 62 to be flipped over and aligned with the opening slot of the right positioning block 233 and locked in.

[0075] The other end of the upper movable screw 62 is provided with an external thread section for threaded engagement with the upper locking nut 63. When the upper movable screw 62 is flipped to a vertical position and engages with the opening slot at the bottom of the left positioning block 243, the upper locking nut 63 is tightened along the thread section, so that the upper movable screw 62 presses against the upper surface of the positioning block 243, thereby reliably locking the rotary limiting mechanism 2 in one orientation.

[0076] The top surface of the mounting base body is also provided with a threaded hole 56 for installing the upper limit support rod 61. The threaded hole 56 is a blind hole with an internal thread at the bottom, and the thread specification matches the external thread of the upper limit support rod 61.

[0077] That is, when the rotary limit mechanism 2 is in a certain orientation (e.g.) Figure 3 As shown), the upper movable screw 62 rotates upward from a horizontal state to a vertical state around the upper limit pin 64, and its threaded end is accurately inserted into the opening groove of the left positioning block 243. Then, by tightening the upper locking nut 63, an axial clamping force is applied, so that the bottom surface of the left positioning block 243 is tightly fitted with the end face of the upper limit support rod 61, thereby stably limiting the rotary limiting mechanism 2 to a preset angle position. Figure 2 As shown.

[0078] Similarly, when the rotary limit mechanism 2 is in the second orientation (e.g.) Figure 4As shown), the lower movable screw 72 rotates towards the support 11, causing it to insert into the opening slot on the right positioning block 233. Then, by tightening the lower locking nut 73, the bottom surface of the right positioning block 233 is tightly fitted with the end face of the lower limit support 71, thereby stably limiting the rotary limiting mechanism 2 to a preset angle position (e.g., ...). Figure 6 (As shown).

[0079] This structure utilizes upper and lower limit support rods to provide a high-rigidity support benchmark, and the rotatable design of upper and lower movable screws adapts to locking requirements under different rotation angles. Combined with the snap-fit ​​+ nut locking method, it significantly improves the ease of operation while ensuring connection reliability. It is particularly suitable for machining end holes of sheet metal that require frequent switching of machining directions.

[0080] In order to correct the position of the rotary limiting mechanism 2, that is, the height of the upper and lower limiting support rods, this application also provides a leveling pin 8. One end of the leveling pin 8 passes through the pin hole 211 on the rotary flange 21 and the reference hole 15 on the support 11 of the mounting base 1 in sequence, for correcting the position of the rotary limiting mechanism 2.

[0081] Leveling pin 8 Figure 15 As shown, it includes a base hole positioning end 81, a pin hole positioning end 82, a retaining ring 83, and a handheld end 84 connected in sequence. The outer diameter of the base hole positioning end 81 matches the inner diameter of the reference hole 15 provided on the mounting base 1, and is used to insert and fit tightly in the reference hole 15. The pin hole positioning end 82 is another coaxial cylinder, the outer diameter of which matches the inner diameter of the pin hole 211 opened on the rotary flange 21, and is used to insert and fit tightly in the corresponding pin hole. The retaining ring 83 is located between the pin hole positioning end 82 and the handheld end 84, and its outer diameter is larger than the diameter of the reference hole 15 and the pin hole 211. It is used to abut against the outer end face of the rotary flange 21 after full insertion to prevent the pin from penetrating too much axially. The handheld end 84 is located at the end, which is convenient for the operator to hold and insert / remove the pin.

[0082] The reference hole 15 is formed on the side wall of the support 11 of the mounting base 1, located on the outer periphery of the shaft mounting hole 12, and its axis is parallel to the axis of the rotary shaft 22; at least two pin holes 211 are provided, which are symmetrically arranged on the circumference of the rotary flange 21, and the included angle between the two is equal to the set rotation angle of the rotary limiting mechanism 2 between direction one and direction two, which can be selected as 90°. One pin hole 211 is used to correct the posture in direction one (i.e., the left positioning block 243 is engaged with the upper limit member 6), and the other pin hole is used to correct the posture in direction two (i.e., the right positioning block 233 is engaged with the lower limit member 7).

[0083] When correcting the orientation, the leveling pin 8 is inserted so that the base hole positioning end 81 is located in the reference hole 15 of the mounting base 1 and the pin hole positioning end 82 is located in the pin hole 211 of the rotary flange 21, so that the position of the rotary flange 21 is forcibly constrained to the preset first reference orientation; and at the same time, the height of the upper limit support rod 61 is adjusted by rotating it so that its top end is exactly against the bottom end face of the left positioning block 243, thereby realizing the orientation correction of the rotary limit mechanism 2.

[0084] When correcting the orientation of the second position, the pin hole positioning end 82 is inserted into another pin hole of the rotating flange 21 to establish the second reference orientation of the rotation limit mechanism 2.

[0085] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application shall be within the scope of protection of the claims of this application.

Claims

1. A rotary positioning device for machining adjacent end holes of a sheet metal, comprising a mounting base (1), characterized in that: A rotary limiting mechanism (2) is rotatably mounted on the mounting base (1). The rotary limiting mechanism (2) includes a rotary flange (21) rotatably connected to the mounting base (1). Left and right positioning members are fixed on the rotary flange (21). One end of the left and right positioning members intersects and forms a V-shaped mounting cavity. The left and right positioning members located in the V-shaped mounting cavity are symmetrically provided with adjustment components for clamping and positioning the plate to be processed. It also includes a limiting seat (5) fixed on the mounting base (1), the top of the limiting seat (5) is provided with an upper limiting member (6) and the bottom is provided with a lower limiting member (7); rotate the rotary limiting mechanism (2) to connect the left positioning member (24) with the upper limiting member (6) or connect the right positioning member (23) with the lower limiting member (7) to position the plate and thus process its adjacent end face holes.

2. The rotary positioning device according to claim 1, characterized in that: The mounting base (1) includes a vertically connected support (11) and a base (14). The rotation limiting mechanism (2) is mounted on the support (11), and the limiting seat (5) is fixed on the base (14). A shaft mounting hole (12) is provided on the support (11), and a support roller (13) is mounted on the support (11) located on the outer periphery of the shaft mounting hole (12). And / or, The slewing flange (21) is rotatably connected to the support (11) via the slewing shaft (22) and is in contact with the support roller (13).

3. The rotary positioning device according to claim 2, characterized in that: There are at least four support rollers (13), two of which are mounted on the central vertical line of the shaft mounting hole (12); the other two are mounted at equal intervals on both sides of the support roller (13) located below; and / or, The support roller (13) includes a support shaft (131) and a support wheel (133) movably sleeved on the support shaft. The two ends of the support shaft (131) are respectively fixedly installed on the support (11) by a fixed limiting member (16).

4. The rotary positioning device according to claim 1, characterized in that: The adjustment assembly includes a partition (3) and a sliding pressure plate (4), wherein the partition (3) is fixed on the left positioning member (24), and the sliding pressure plate (4) is movably disposed between the left positioning member (24) and the partition (3); The sliding pressure plate (4) and the partition plate (3) work together to clamp and position the plate.

5. The rotary positioning device according to claim 4, characterized in that: The partition (3) includes a partition body (31), and a pressure plate limiting groove (33) for the sliding pressure plate (4) to pass through is provided on the bottom end face of the partition body (31); and / or, The sliding pressure plate (4) includes a base plate (41) and end plates (42) vertically fixed at both ends of the base plate (41). One end plate has a top head (44) fixed on its inner side wall and a tightening adjustment member (43) movably connected to the other end plate. The partition plate (3) and the two end plates (42) form a clamping groove for placing the plate. The size of the clamping groove is adjusted by adjusting the tightening adjustment member (43) to achieve clamping and positioning of the plate.

6. The rotary positioning device according to claim 1, characterized in that: The left positioning component (24) includes a left support plate (241) fixed on the rotary flange (21). A left positioning groove (242) for placing one end of the plate is provided on the inner side wall of the left support plate (241). Circumvention holes (246) for drilling holes in the plate are provided on both sides of the left positioning groove (242). A left positioning block (243) is fixed on the outer side wall of the left support plate (241). The right positioning component (23) includes a right support plate (231) fixed on the slewing flange (21). The inner side wall of the right support plate (231) is provided with a right positioning groove (232) for placing the other end of the plate. The outer side wall of the right support plate (231) is fixed with a right positioning block (233).

7. The rotary positioning device according to claim 6, characterized in that: A left pad (244) is fixed on the inner wall of the left support plate (241), and a right pad (234) is fixed on the inner wall of the right support plate (231). A handle is installed on the end of the left and right support plates away from the rotary flange (21).

8. The rotary positioning device according to claim 1, characterized in that: The limiting seat (5) includes a vertical mounting seat (53) and a horizontal mounting seat (52) with the same structure and connected together. The vertical mounting seat (53) is movably connected to the upper limiting member (6), and the horizontal mounting seat (52) is movably connected to the lower limiting member (7). The vertical mounting base (53) includes a mounting base body, and a groove (54) communicating with an adjacent side wall is provided at one of the top corners of the mounting base body.

9. The rotary positioning device according to claim 8, characterized in that: The upper limit component (6) includes an upper limit support rod (61) and an upper movable screw (62) installed on the mounting base body. One end of the upper limit support rod (61) is fixed on the mounting base body, and one end of the upper movable screw (62) is hinged in the groove (54) and can rotate freely along the opening end of the groove (54). The other end of the upper movable screw (62) is engaged with the rotary limiting mechanism (2) and then fixed with an upper locking nut (63).

10. The rotary positioning device according to claim 9, characterized in that: The groove (54) has through pin holes (55) on opposite side walls for installing upper limit pins (64); one end of the upper movable screw (62) is movably sleeved on the upper limit pin (64) and rotates around the upper limit pin (64); the top surface of the mounting base body also has threaded holes (56) for installing upper limit support rods (61). The lower limit member (7) has the same structure as the upper limit member (6).

11. The rotary positioning device according to claim 9, characterized in that: The upper movable screw (62) includes a screw body (621) and a ring (622) fixed at one end of the screw body. The through hole (623) in the middle of the ring (622) passes through the upper limit pin (64).

12. The rotary positioning device according to claim 1, characterized in that: It also includes a leveling pin (8), one end of which passes through the slewing flange (21) and the mounting base (1) in sequence to correct the position of the slewing limit mechanism (2).

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