Sheet workpiece positioning jig for a cnc machine

Abstract

This application discloses a sheet workpiece positioning fixture for CNC machine tools, comprising: a base plate and a positioning device mounted on the base plate. The positioning device includes: a sealing frame, one end face of which is sealed to the base plate; two drive mechanisms located inside the sealing frame and disposed on both sides of the adsorption mechanism, each drive mechanism having a drive shaft, and the two opposite side walls of the sealing frame having first through holes for the drive shaft to pass through or exit; and a mounting plate, one main plane of which is sealed to the other end face of the sealing frame. After the mounting plate is connected to the sealing frame, a sealed cavity is formed inside the cavity of the sealing frame, which solves the problem of cutting fluid corrosion of moving parts, avoids corrosion of drive components and their shafts, and reduces the probability of jamming failure due to corrosion of such moving parts.

Description

Technical Field

[0001] This application relates to the field of CNC machine tools, and in particular to a sheet workpiece positioning fixture for CNC machine tools. Background Technology

[0002] In the CNC wet machining process of some sheet-like workpieces (such as optical glass), automatic loading and unloading devices are often used to achieve continuous production. Because some workpieces require high machining accuracy, the workpiece positioning device is the key execution unit in the system during the machining process. Its function is to accurately and repeatedly position the workpiece to be processed to the preset machining station to ensure the machining accuracy of subsequent processes.

[0003] Currently, most workpiece positioning devices in existing technologies use motors or cylinders as drive sources. However, because cutting fluid is used for cooling and chip removal during wet machining, it can easily seep into the drive source. After long-term operation, this can cause the drive source to lose accuracy due to corrosion, resulting in movement jamming, and subsequently inaccurate reset or jamming, leading to positioning failures such as inaccurate reset or jamming. This significantly increases the number of unplanned downtimes and results in a high overall equipment failure rate. Summary of the Invention

[0004] The main objective of this application is to propose a sheet workpiece positioning fixture for CNC machine tools, which aims to reduce the overall failure rate of the equipment.

[0005] To achieve the above objectives, this application proposes a sheet-like workpiece positioning fixture for CNC machine tools, comprising: A base plate and a positioning device, wherein the positioning device is mounted on the base plate, and the positioning device includes: A sealing frame, one end face of which is sealed to the base plate, and an adsorption mechanism for adsorbing sheet-like workpieces is provided in the middle of the sealing frame, and the adsorption mechanism is provided with an adsorption channel in the vertical direction; Two drive mechanisms are located inside the sealing frame and are arranged on both sides of the adsorption mechanism. Each drive mechanism is provided with a drive shaft, and the two opposite side walls of the sealing frame are provided with first through holes for the drive shaft to pass through or out. The mounting plate has a main plane that is sealed to the other end face of the sealing frame. The mounting plate has a second through hole in the middle, which is connected to the adsorption channel of the adsorption mechanism so that the adsorption mechanism can adsorb the sheet-like workpiece. After the mounting plate is connected to the sealing frame, a sealed cavity is formed inside the cavity of the sealing frame. Two horizontal positioning components are provided, each of which is provided with a positioning corner. The positioning corner is connected to the drive shaft. The two positioning corners move horizontally in another main plane of the mounting plate under the drive shaft to position the sheet-like workpiece.

[0006] In some embodiments, the horizontal positioning component further includes an adapter, which is connected to the drive shaft and the positioning corner respectively, and the drive shaft drives the adapter to move so as to move the positioning corner.

[0007] In some embodiments, the positioning corner is plate-shaped, including a plate body and a positioning edge. The positioning edge is located at one end of the plate body and includes a first edge parallel to the axial direction and a second edge perpendicular to the first edge. The two driving mechanisms are obliquely arranged at opposite corners of the sealing frame, and the two driving shafts extend in opposite directions and are parallel to the diagonals of the two positioning corners at their initial positions.

[0008] In some embodiments, a guide structure is provided between the adapter and the positioning corner, and the positioning corner can move along the guide structure.

[0009] In some embodiments, the guide structure includes a guide groove located at one of the positioning corner and the adapter, and a guide block located at the other of the positioning corner and the adapter.

[0010] In some embodiments, the sealing frame is square in shape and includes a first sidewall, a second sidewall, a third sidewall, and a fourth sidewall that are connected end to end along the circumference. The first sidewall is opposite to the third sidewall, and the second sidewall is opposite to the fourth sidewall. Two first through holes are respectively provided on the first sidewall and the third sidewall.

[0011] In some embodiments, the mounting plate is provided with a worktable for mounting the sheet-like workpiece, and the worktable is provided with a third through hole communicating with the second through hole.

[0012] In some embodiments, the driving mechanism includes a first pipe connector, the adsorption mechanism includes a second pipe connector, and the second sidewall or the fourth sidewall is provided with mounting holes for mounting the first pipe connector and the second pipe connector.

[0013] In some embodiments, there are two positioning devices, spaced apart on the base plate.

[0014] In some embodiments, a tool setter located between the two positioning devices is also included.

[0015] This technical solution involves setting a sealing frame, with its upper and lower end faces connected to the base plate and mounting plate respectively, forming a sealed cavity within the frame. The drive mechanism is installed inside this sealed cavity, utilizing its waterproof effect to provide waterproof protection. The drive shaft of the drive mechanism passes through a first through-hole in the sealing frame. The gap between the first through-hole and the drive shaft is small, minimizing its impact on the seal. Alternatively, a sealing ring or similar method can be used to further prevent cutting fluid from entering the sealed cavity, ensuring the normal operation of the drive mechanism. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of an embodiment of the sheet workpiece positioning fixture for CNC machine tools according to this application; Figure 2 This is an exploded view of an embodiment of the sheet workpiece positioning fixture for CNC machine tools according to this application; Figure 3 This is an exploded view of the sealing frame of an embodiment of the sheet workpiece positioning fixture for CNC machine tools according to this application; Figure 4 This is a schematic diagram of the positioning device structure of an embodiment of the sheet workpiece positioning fixture for CNC machine tools according to this application; Figure 5 This is a schematic diagram of the sealing frame structure of an embodiment of the sheet workpiece positioning fixture for CNC machine tools according to this application; Figure 6 This is a bottom view of an embodiment of the sheet workpiece positioning fixture for CNC machine tools according to this application; Figure 7 This is a front view of an embodiment of the sheet workpiece positioning fixture for CNC machine tools according to this application; Figure 8 for Figure 7 Schematic diagram of the cross-sectional structure along the AA direction. Detailed Implementation

[0017] The solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments in this application, and not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0018] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0019] It should also be noted that when a component is described as "fixed to" or "set on" another component, it can be directly on the other component or there may be an intervening component present. When a component is described as "connected to" another component, it can be directly connected to the other component or there may be an intervening component present.

[0020] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed in this application.

[0021] The CNC (Computer Numerical Control) machine tool in this application refers to a CNC machine tool equipped with automated tooling fixtures. Typically, the fixture is mounted on the machine tool worktable. After the workpiece (product) is placed in, the piston rod of the cylinder extends and pushes the workpiece from the side to achieve positioning. The cylinder remains in a pressed state. Then, a vacuum generator or vacuum pump or other vacuum generating device generates negative pressure to firmly hold the workpiece on the surface of the fixture, preventing the workpiece from vibrating or shifting during processing.

[0022] This application proposes a sheet-like workpiece positioning fixture for CNC machine tools, such as... Figure 1 and Figure 2 As shown, it includes: Base plate 1 and positioning device 2, the positioning device 2 is installed on base plate 1, and the positioning device 2 includes: The sealing frame 21 has one end face sealed to the bottom plate 1. The middle part of the sealing frame 21 is provided with an adsorption mechanism 22 for adsorbing sheet-like workpieces. The adsorption mechanism 22 is provided with an adsorption channel 221 vertically. Two drive mechanisms 23 are located inside the sealing frame 21 and are set on both sides of the adsorption mechanism 22. The drive mechanism 23 is provided with a drive shaft 231. The two opposite side walls of the sealing frame 21 are provided with first through holes 211 for the drive shaft 231 to pass through or out. Mounting plate 3, one main plane of mounting plate 3 is sealed to the other end face of sealing frame 21. The middle part of mounting plate 3 is provided with second through hole 31, which is connected to the adsorption channel 221 of adsorption mechanism 22 so that adsorption mechanism 22 can adsorb sheet workpiece. After mounting plate 3 is connected to sealing frame 21, a sealed cavity is formed in the cavity of sealing frame 21. Two horizontal positioning components 4, each of which is provided with a positioning corner 42, are connected to the drive shaft 231. The two positioning corners 42 move horizontally in another main plane of the mounting plate 3 under the drive of the drive shaft 231 to position the sheet-like workpiece.

[0023] In this embodiment, the base plate 1 is mainly used to install the positioning device 2, and the base plate 1 is fixed to the machine tool's worktable by fixing bolts. The positioning device 2 includes two horizontal positioning components 4, the movement planes of which are parallel to the plane of the base plate 1. Taking the plane of the base plate 1 being parallel to the horizontal plane as an example, each horizontal positioning component 4 is provided with a positioning angle 42, and the two positioning angles 42 are used together to position the sheet-like workpiece in the horizontal direction. The positioning device 2 also includes an adsorption mechanism 22, which is provided with a vertical adsorption channel 221. Thus, after the horizontal position of the sheet-like workpiece is positioned by the horizontal positioning components 4, the vertical adsorption channel 221 adsorbs and fixes the sheet-like workpiece, which can simultaneously position the sheet-like workpiece in both the horizontal and vertical directions.

[0024] The sealing frame 21 of the positioning device 2 can be manufactured using different processes. The sealing frame 21 can be integrally formed or composed of multiple plate-like structures. In a preferred embodiment, please refer to... Figure 2 The sealing frame 21 is composed of multiple sealing plates, which facilitates the installation of the sealing frame 21 on the base plate 1. The sealing frame 21, together with the base plate 1 and the mounting plate 3, forms a sealed cavity in which the adsorption mechanism 22 and the driving mechanism 23 can be housed, thereby achieving waterproof protection for the driving mechanism 23.

[0025] The drive mechanism 23 is used to drive the horizontal positioning component 4. The drive mechanism 23 can use a cylinder or a linear motor as the drive source. In a preferred embodiment, the drive source of the drive mechanism 23 is a cylinder, and the drive shaft 231 is the piston rod of the cylinder. The cylinder is mounted on the mounting plate 3, and the sealing frame 21 has a first through hole 211. The piston rod passes through the sealing frame 21 to drive the horizontal positioning component 4.

[0026] It should be noted that the sealing frame 21, together with the base plate 1 and the mounting plate 3, forms a sealing cavity. The drive mechanism 23 is mounted on this sealing cavity, and a first through hole 211 is provided for the drive shaft 231 to pass through. The gap between the drive shaft 231 and the first through hole 211 has little impact on the protective effect. In a preferred embodiment, please refer to... Figure 3 A sealing gap is formed between the first through hole 211 and the drive shaft 231, and the sealing gap is sealed by the sealing ring 234.

[0027] Based on the sealing provided by the sealing ring 234, to maintain the sealing effect of the sealing cavity, the first through hole 211 is used to allow the drive shaft 231 to pass through. The drive shaft 231 passes through the inner hole of the sealing ring 234 and radially expands outward to tighten the sealing ring 234, causing it to elastically deform and tightly fit between the outer peripheral wall of the drive shaft 231 and the wall of the first through hole 211. Of course, the above is merely an example; specific details can be determined according to actual needs, and this invention is not limited thereto.

[0028] It should be noted that the drive shaft 231 passes through the first through hole 211 and is exposed outside the sealing frame 21. The first through hole 211 has a certain length. Based on this, two sealing rings 234 can be set at the beginning and end positions of the first through hole 211, corresponding to the drive shaft 231. The sealing frame 21 can be equipped with fixing plates at both ends of the first through hole 211 to limit the sealing rings 234. The two fixing plates can limit the sealing rings 234 and prevent the sealing rings 234 from dislodging from the first through hole 211.

[0029] In this way, a better sealing effect can be achieved through two sealing rings. Of course, multiple retaining rings, water-stop rings or retaining cylinders are set on the outside of the drive shaft 231 between the two sealing rings as stop members. Together with two retaining plates, the position of the sealing rings can be further restricted.

[0030] It should be noted that the sealing ring can be fixed inside the first through hole 211, or assembled between the first through hole 211 and the drive shaft 231 by means of snap-fit ​​and sleeve, so as to prevent water from entering the sealing cavity.

[0031] It should also be noted that the mounting plate 3 has a second through hole 31 in the middle, which communicates with the adsorption channel 221 of the adsorption mechanism 22, allowing the adsorption mechanism 22 to adsorb the sheet-like workpiece. The sheet-like workpiece itself has a sealing effect on the second through hole 31, and this sealing effect is further improved through adsorption. Of course, when using the suction nozzle or other adsorption components of the adsorption mechanism to adsorb the workpiece, taking the suction nozzle as an example, the suction nozzle will pass through this second through hole 31 and directly contact the workpiece. The suction nozzle also has a sealing effect on this through hole, and the opening of the second through hole 31 has a low impact on the sealing cavity.

[0032] A waterproof sealed cavity is formed by the sealing frame 21 in conjunction with the base plate 1 and the mounting plate 3. The drive mechanism 23 is installed inside the sealed cavity. This prevents the drive mechanism 23 from being exposed to the external wet machining environment. The drive shaft 231 of the drive mechanism 23 needs to pass through the sealing frame 21 to drive the positioning component 4 to move, thereby controlling the positioning angle 42 to position the workpiece. Similarly, vacuum lines and signal lines also need to pass through the sealing frame 21. Therefore, multiple through holes are provided to allow them to pass through, and sealing rings are used at the through holes to keep them sealed. This prevents cutting fluid from entering the sealed cavity and provides waterproof protection for the drive mechanism 23.

[0033] In this embodiment of the application, the horizontal positioning component 4 further includes an adapter 41, which is connected to the drive shaft 231 and the positioning corner 42 respectively. The drive shaft 231 drives the adapter 41 to move so as to move the positioning corner 42.

[0034] like Figure 4 As shown, the side of the adapter 41 closest to the sealing frame 21 is connected to the drive shaft 231, and the side away from the base plate 1 is connected to the positioning corner 42. In this way, the position of the positioning corner 42 can be raised, and when driven by the drive shaft 231, the positioning corner 42 can position the sheet-like workpiece.

[0035] In this embodiment, the positioning corner 42 is plate-shaped, including a plate body 421 and a positioning edge 422. The positioning edge 422 is located at one end of the plate body 421, including a first edge 4221 parallel to the axial direction and a second edge 4222 perpendicular to the first edge 4221. The two drive mechanisms 23 are inclinedly arranged at opposite corners of the sealing frame 21, and the extension directions of the two drive shafts 231 are opposite and parallel to the diagonals of the two positioning corners 42 at their initial positions.

[0036] like Figure 2 As shown, a clearance groove is provided at the intersection of the first edge 4221 and the second edge 4222 to avoid protruding edges of the workpiece. This clearance groove prevents the positioning corner 42 from squeezing or colliding with the workpiece when positioning it, thus avoiding damage. The shape of the positioning edge 422 can also be set according to the outer contour of the workpiece. Typically, for square, sheet-like workpieces, its shape is L-shaped. When the workpiece shape is other, the shape of the positioning edge 422 should also be adjusted accordingly. Thus, the positioning corner 42 of this application can adapt to workpieces of different specifications.

[0037] In this embodiment, the drive mechanism 23 is inclined relative to the sealing frame 21, and the two drive shafts 231 extend in opposite directions and are parallel to the diagonals of the two positioning angles 42 when they are in their initial positions. The initial position of the two positioning angles 42 refers to the position of the two positioning angles 42 in the middle of the adapter 41 when the sheet-like workpieces processed by the machine tool are of the same size. If the workpieces processed are of different sizes, the position of the positioning angles 42 on the adapter 41 can be adjusted at the initial position to cover the workpiece processing range as needed. This position is the initial position.

[0038] Thus, when the drive shaft 231 moves the positioning corner 42, the positioning corner 42 eventually approaches the workpiece from its corner and gradually comes into contact with it. When the drive mechanism 23 drives the positioning corner 42 to position the workpiece, it can simultaneously retract along the side of the workpiece, completing the bidirectional and lateral mechanical alignment of the workpiece.

[0039] In this embodiment of the application, a guide structure is provided between the adapter 41 and the positioning corner 42, and the positioning corner can move along the guide structure; the guide structure includes a guide groove 411 located at one of the positioning corner 42 and the adapter 41, and a guide block 412 located at the other of the positioning corner 42 and the adapter 41.

[0040] The adapter 41 can guide the positioning corner 42 to adjust its position along its own length; it can also drive the positioning corner 6 to move along the axial direction of the drive shaft 231 under the drive of the drive mechanism 23, so as to achieve the positioning of the sheet workpiece.

[0041] Please refer to Figure 4 The adapter 41 is slidably connected to the positioning corner 42, allowing the positioning corner 42 to slide along the adjustment path, thus adjusting the distance between the two positioning corners 42. Furthermore, the relative position between each positioning corner 42 and the drive shaft 231 also changes. Therefore, when the drive shaft 231 drives the two positioning corners 42 to the end of the movement path, the size of the positioning space defined by the two positioning corners 42 is also adjusted.

[0042] It should be noted that the positioning corner 42 and the guide block 412 are connected by fastening bolts, and the guide groove 411 is formed on the adapter 41. After the positioning corner 42 is displaced along the position adjustment path, the guide block 412 is pressed against the inner wall of the guide groove 411 by adjusting the fastening bolts, thereby restricting the sliding of the guide block 412 relative to the adapter 41. In this way, by controlling the tightness of the fastening bolts, the positioning corner 42 connected to the guide block 412 can be controlled. When the position of the positioning corner 42 needs to be adjusted, the bolts are loosened, and the positioning corner 42 is pushed to slide along the guide groove 411. Based on this, the two positioning corners 42 can define a variable positioning space, which can be adapted to workpieces of different specifications.

[0043] In this embodiment, the sealing frame 21 is square in shape and includes a first sidewall 215, a second sidewall 216, a third sidewall 217 and a fourth sidewall 218 connected end to end along the circumference. The first sidewall 215 is opposite to the third sidewall 217, and the second sidewall 216 is opposite to the fourth sidewall 218. Two first through holes 211 are respectively provided on the first sidewall 215 and the third sidewall 217.

[0044] Corresponding to the two drive mechanisms 23 located diagonally opposite each other on the sealing frame 21, two first through holes 211 are respectively located on the first side wall 215 and the third side wall 217. In this way, the two drive shafts 231 can pass through the inside of the first through holes 211 to connect to the adapter 41.

[0045] It should be noted that the drive shaft 231 can also be a guide shaft 233 connected to the piston rod of the cylinder; please refer to [reference needed]. Figure 6 The guide shaft 233 can be one or more. When one guide shaft 233 is provided, the guide shaft 233 is connected to the piston rod; when multiple guide shafts 233 are provided, the multiple guide shafts 233 are connected to the piston rod through the connecting plate 232. In this way, the cylinder and piston rod are both in the sealed cavity, while the guide shaft 233 is exposed outside the sealed cavity, which can prevent the cylinder and piston rod from being directly exposed to the wet processing environment.

[0046] The main function of the cylinder is to drive the positioning corner 42 to move through the guide shaft 233. By using its installation method that is inclined relative to the sealing frame 21, the positioning corner 42 is controlled to move from the oblique side of the sheet workpiece toward or away from the workpiece, thereby cooperating with the vacuum adsorption mechanism 22 to calibrate and fix the position of the workpiece.

[0047] In this embodiment, the mounting plate 3 is provided with a worktable 5 for mounting sheet-like workpieces, and the worktable 5 is provided with a third through hole 51 communicating with the second through hole 31.

[0048] like Figure 5 As shown, after the workpiece is positioned, the vacuum sending device is turned on, and an adsorption force will be generated at the adsorption channel 221. The workpiece can be adsorbed through the second through hole 31 provided on the mounting plate 3 and the third through hole 51 provided on the worktable 5, thereby achieving the adsorption and fixation of the workpiece.

[0049] In this embodiment of the application, the driving mechanism includes a first pipe connector, the adsorption mechanism includes a second pipe connector, and the second sidewall 216 or the fourth sidewall 218 is provided with mounting holes 212 for mounting the first pipe connector and the second pipe connector.

[0050] The mounting hole 212 is mainly used to allow the air passage of the cylinder, the vacuum line of the adsorption mechanism 22, and the signal line for communication connection to pass through. In a preferred embodiment, the first pipe connector and the second pipe connector are embedded inside the mounting hole 212, and the internal and external air passages or pipelines can be connected through these two waterproof pipe connectors.

[0051] It should be noted that the signal line can also be sealed by a cable retainer. The inner diameter of the rubber ring in the cable retainer is small, which can match the outer diameter of the signal line to achieve a seal between the signal line and the mounting hole 212.

[0052] In practical applications, the pipe fitting itself is assembled into the through hole, and the installation gap between the two can be sealed using structures such as sealing rings and sealing rings. Alternatively, signal cables can be directly led out through the through hole, and the gap between the through hole and the signal cable can be sealed using sealing rings or structural adhesive.

[0053] In this embodiment of the application, there are two positioning devices 2, which are spaced apart on the base plate 1. The device also includes a tool setter 6, which is located between the two positioning devices 2.

[0054] By setting two positioning devices 2 side by side, dual-station processing can be achieved. The tool setter 6 of the machine tool is set between the two positioning devices 2, so that the working area covered by the two positioning devices 2 can be completed by one tool setter 6. Similarly, multiple positioning devices 2 can be set to further improve the processing efficiency of the machine tool.

[0055] In this embodiment, to reduce the impact of the thickness of the sealing frame 21 on positioning, please refer to... Figure 6 The adapter 41 includes a connecting part that connects to the drive shaft 231 and a mounting part for mounting the positioning corner 42. The connecting part extends outward from the side wall of the sealing frame 21 to form a protrusion, and the protrusion has an abutment wall perpendicular to the axial direction. The sealing frame 21 is provided with a recess that matches the protrusion. The recess also has an abutment wall 214 perpendicular to the axial direction. When the driving mechanism 23 drives the adapter 41 to gradually approach the sealing frame 21, the protrusion fits into the recess, and the abutment wall of the protrusion and the abutment wall 214 of the recess finally abut against each other.

[0056] Thus, the abutment wall of the convex part is perpendicular to the axial direction, and the abutment wall 214 of the concave part is parallel to the abutment wall of the convex part. The abutment wall 214 of the convex part can be used to connect the drive shaft 231. During the process of the drive mechanism 23 driving the adapter 41 to move, the convex part gradually approaches the concave part. When the abutment wall of the convex part abuts against the abutment wall 214 of the concave part, the adapter 41 moves to the end of the path, reducing the impact of the thickness of the sealing frame 21.

[0057] Furthermore, referring to Figure 7 and Figure 8The adapter 41 is also provided with a guide plate 413. The mounting plate 3 has a limiting groove 32 for accommodating the guide plate 413. Under the drive of the drive mechanism 23, the guide plate 413 can reciprocate along the axial direction in the limiting groove 32 to limit and guide the movement stroke of the adapter 41.

[0058] like Figure 4 As shown, the sealing frame 21 has a relief groove 214 in the recessed area. The guide plate 413 can be accommodated at least partially inside the relief groove 214 and can reciprocate along the relief groove 214 under the drive of the drive mechanism 23. The separately provided guide plate 413 can cooperate with the limiting groove 32 of the mounting plate 3 to limit the adapter 41 and prevent the adapter 41 or the sealing frame 21 from being damaged by collision.

[0059] This technical solution uses a sealing frame 21 in conjunction with a base plate 1 and a mounting plate 3 to form a waterproof sealed cavity, inside which the drive mechanism 23 is installed. This prevents the drive mechanism 23 from being exposed to the external wet machining environment. The drive shaft 231 driven by the drive mechanism 23 needs to pass through the sealing frame 21 to move the positioning angle 42, thereby controlling the positioning angle 42 to position the sheet-like workpiece. Similarly, the vacuum lines of the adsorption mechanism 22 and the signal lines used for signal transmission also need to pass through the sealing frame 21. Based on this, a first through hole 211 and a mounting hole 212 are provided to allow passage, and all through holes are sealed with sealing rings or other sealing methods. This prevents cutting fluid from entering the sealed cavity, protecting the drive mechanism 23 and its drive shaft 231 from corrosion and reducing the probability of jamming failure due to corrosion of such moving parts.

[0060] In the initial state of operation, the drive mechanisms 23 of the two positioning devices 2 keep the positioning angles 42 open. The vacuum generator used by the machine tool is turned off, waiting for the configured robot arm to feed the workpiece. At this time, the internal tool setter 8 is in standby mode. Then, the robot arm places the sheet-like workpiece on the worktable 5, and the drive mechanism 23 drives the positioning angles 42 on both sides to retract synchronously, completing the bidirectional and lateral mechanical alignment of the workpiece. At this time, the vacuum generator is turned on to attract the workpiece, and then the drive mechanism 23 drives the positioning angles 42 to open, canceling the positioning of the sheet-like workpiece. The machine tool processes the workpiece. After processing, the vacuum generator is turned off, and the robot arm removes the product, repeating this cycle. In standby mode, the fasteners used by the positioning angles 42, i.e., the fastening bolts, can be loosened. Through the sliding cooperation between the guide block 412 and the guide groove 411, the sliding of the positioning angles 42 can be controlled to adjust the position of the positioning angles 42. Replace the worktable 5 as needed without completely removing the positioning corner 42 and the worktable 5 or positioning device 2. After adjustment, reset it to adapt to the processing of workpieces of other specifications.

[0061] The above description is only a part or preferred embodiment of this application. Neither the text nor the drawings should limit the scope of protection of this application. All equivalent structural transformations made using the content of this application's specification and drawings under the overall concept of this application, or direct / indirect applications in other related technical fields, are included within the scope of protection of this application.

Claims

1. A sheet-like workpiece positioning fixture for CNC machine tools, characterized in that, include: A base plate and a positioning device, wherein the positioning device is mounted on the base plate, and the positioning device includes: A sealing frame, one end face of which is sealed to the base plate, and an adsorption mechanism for adsorbing sheet-like workpieces is provided in the middle of the sealing frame, and the adsorption mechanism is provided with an adsorption channel in the vertical direction; Two drive mechanisms are located inside the sealing frame and are arranged on both sides of the adsorption mechanism. Each drive mechanism is provided with a drive shaft, and the two opposite side walls of the sealing frame are provided with first through holes for the drive shaft to pass through or out. The mounting plate has a main plane that is sealed to the other end face of the sealing frame. The mounting plate has a second through hole in the middle, which is connected to the adsorption channel of the adsorption mechanism so that the adsorption mechanism can adsorb the sheet-like workpiece. After the mounting plate is connected to the sealing frame, a sealed cavity is formed inside the cavity of the sealing frame. Two horizontal positioning components are provided, each of which is provided with a positioning corner. The positioning corner is connected to the drive shaft. The two positioning corners move horizontally in another main plane of the mounting plate under the drive shaft to position the sheet-like workpiece.

2. The sheet-like workpiece positioning fixture for CNC machine tools according to claim 1, characterized in that, The horizontal positioning component also includes an adapter, which is connected to the drive shaft and the positioning corner respectively. The drive shaft drives the adapter to move so as to move the positioning corner.

3. The sheet-like workpiece positioning fixture for CNC machine tools according to claim 2, characterized in that, The positioning corner is plate-shaped and includes a plate body and a positioning edge. The positioning edge is located at one end of the plate body and includes a first edge parallel to the axial direction and a second edge perpendicular to the first edge. The two driving mechanisms are inclinedly arranged at opposite corners of the sealing frame. The two driving shafts extend in opposite directions and are parallel to the diagonals of the two positioning corners at their initial positions.

4. The sheet workpiece positioning fixture for CNC machine tools according to claim 3, characterized in that, A guide structure is provided between the adapter and the positioning corner, and the positioning corner can move along the guide structure.

5. The sheet-like workpiece positioning fixture for CNC machine tools according to claim 4, characterized in that, The guide structure includes a guide groove located at one of the positioning corner and the adapter, and a guide block located at the other of the positioning corner and the adapter.

6. The sheet-like workpiece positioning fixture for CNC machine tools according to claim 1, characterized in that, The sealing frame is square in shape and includes a first sidewall, a second sidewall, a third sidewall and a fourth sidewall that are connected end to end along the circumference. The first sidewall is opposite to the third sidewall and the second sidewall is opposite to the fourth sidewall. The two first through holes are respectively provided on the first sidewall and the third sidewall.

7. The sheet-like workpiece positioning fixture for a CNC machine tool according to any one of claims 1 to 6, characterized in that, The mounting plate is provided with a worktable for mounting the sheet-like workpiece, and the worktable is provided with a third through hole communicating with the second through hole.

8. The sheet-like workpiece positioning fixture for CNC machine tools according to claim 7, characterized in that, The driving mechanism includes a first pipe connector, the adsorption mechanism includes a second pipe connector, and the second sidewall or the fourth sidewall is provided with mounting holes for installing the first pipe connector and the second pipe connector.

9. The sheet-like workpiece positioning fixture for CNC machine tools according to claim 8, characterized in that, There are two positioning devices, which are spaced apart on the base plate.

10. The sheet-like workpiece positioning fixture for a CNC machine tool according to claim 9, characterized in that, It also includes a tool setter located between the two positioning devices.

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