Powder cleaning machine and workpiece positioning son-mother plate structure thereof

Abstract

The invention relates to a powder cleaning machine and a workpiece positioning sub-mother board structure thereof, the powder cleaning machine comprises the workpiece positioning sub-mother board structure, the workpiece positioning sub-mother board structure comprises a mother board, the mother board is installed on a powder cleaning table of the powder cleaning machine, the top of the mother board is provided with a zero point positioning module and a guide pin, and the guide pin is used for controlling relative position deviation so that the zero point positioning module can be guided in conveniently; the zero point positioning module is respectively connected with the air source and a control system of the purifier, and is switched between an opening position and a closing position along with connection or disconnection of the air source; the bottom of the daughter board is provided with a tensioning nail matched with the zero point positioning module, so that the daughter board and the mother board can be quickly positioned and fixed; threaded holes for mounting substrates with different sizes are formed in the tops of the daughter boards; and the detection switch is mounted on the mother board, is connected with a control system of the powder cleaning machine, and is used for detecting whether the mother board and the daughter board are connected in place or not, judging the running state of the powder cleaning table, and immediately performing sudden stop and alarming when detecting that the mother board and the daughter board are not connected in place or the powder cleaning table runs abnormally.

Description

Technical Field

[0001] This invention relates to metal additive manufacturing technology, and in particular to a powder cleaning machine and its workpiece positioning mother-daughter plate structure. Background Technology

[0002] In traditional metal additive manufacturing, after the workpiece is prepared, it needs to be hoisted by an overhead crane to a powder cleaning machine, and then manually secured to the powder cleaning table with bolts. After powder cleaning, it is manually disassembled and hoisted to the next process. This manual loading and unloading method has disadvantages such as low production efficiency and unstable production cycle. With the advent of Industry 4.0 and the era of intelligent manufacturing, automated production lines have begun to gradually replace manual production due to their advantages such as high production efficiency, cost savings, production flexibility, and high safety.

[0003] In automated production lines for cleaning parts, since the workpieces to be cleaned are of different models and vary greatly in size and shape, there is an urgent need for a universal device that can install and fix the workpieces and automatically position them. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a powder cleaning machine and its workpiece positioning mother and daughter plate structure in response to the above-mentioned defects of the prior art.

[0005] To achieve the above objectives, the present invention provides a workpiece positioning mother-daughter plate structure for a powder cleaning machine, comprising:

[0006] A mother plate is installed on the cleaning table of the cleaning machine. The top of the mother plate is equipped with a zero-point positioning module and a guide pin. The guide pin is used to control the relative position deviation to facilitate the introduction of the zero-point positioning module. The zero-point positioning module is connected to the air source and the control system of the cleaning machine, and switches between open and closed positions as the air source is turned on or off.

[0007] The sub-board has tensioning pins at its bottom that are compatible with the zero-point positioning module for quick positioning and fixation with the mother board; the top of the sub-board has threaded holes for mounting substrates of different sizes; and

[0008] A detection switch is installed on the motherboard and connected to the control system of the cleaning machine. It is used to detect whether the motherboard and the daughterboard are connected in place and to determine the operating status of the cleaning table. When it is detected that the motherboard and the daughterboard are not connected in place or the cleaning table is operating abnormally, it will immediately stop and alarm.

[0009] In the workpiece positioning mother-daughter plate structure of the above-mentioned powder cleaning machine, the positioning accuracy of the guide pin is ±2 mm.

[0010] In the workpiece positioning mother-daughter plate structure of the above-mentioned powder cleaning machine, the guide pin includes a cylindrical pin and a diamond pin, which are arranged on the horizontal center line of the daughter plate and are symmetrical to the vertical center line of the daughter plate.

[0011] In the workpiece positioning mother-daughter plate structure of the above-mentioned powder cleaning machine, the bottom of both the cylindrical pin and the rhomboid pin is provided with a circular base.

[0012] The workpiece positioning mother-daughter plate structure of the above-mentioned powder cleaning machine includes a zero-point positioning module comprising a tensioning positioning plate, a latching mechanism, a piston driving mechanism, and a sensor. The bottom axis of the tensioning positioning plate is provided with an air pipe interface for connecting to an air pipe. The piston driving mechanism is connected to the latching mechanism and an air source respectively. When the air source is opened, the latching mechanism is driven to open through the piston driving mechanism. After the tensioning pin enters, the air source is disconnected, and the piston driving mechanism drives the latching mechanism to self-lock.

[0013] In the workpiece positioning mother-daughter plate structure of the above-mentioned powder cleaning machine, the zero-point positioning module pushes the piston of the piston drive mechanism through a strong self-locking spring, which in turn drives the latch of the latch clamping mechanism to lock the tensioning pin.

[0014] The workpiece positioning mother-daughter plate structure of the above-mentioned powder cleaning machine includes a zero-point positioning module that further includes a turbocharger mechanism, which increases power and clamping force by compressing air and adapts to the rotation of the powder cleaning table at various angles.

[0015] In the workpiece positioning mother-daughter plate structure of the above-mentioned powder cleaning machine, the detection switch is a short ball-bearing rocker arm type detection switch. When the daughter plate is connected and separated from the mother plate, the corresponding contacts of the detection switch close or open to control the corresponding circuit to realize position detection and alarm.

[0016] In the workpiece positioning mother-daughter plate structure of the above-mentioned powder cleaning machine, two detection switches are installed on the mother plate. When the contacts of the two detection switches are triggered and closed at the same time, the control system determines that the daughter plate and the mother plate are connected in place; otherwise, the control system determines that the position is abnormal and stops automatic operation, and at the same time outputs alarm information to the human-machine interface and controls the buzzer and / or indicator light to alarm.

[0017] To better achieve the above objectives, the present invention also provides a powder cleaning machine, which includes the above-mentioned workpiece positioning mother-daughter plate structure.

[0018] The technical advantages of this invention are as follows:

[0019] The mother-daughter plate structure of this invention is used for the handling of workpieces in an automated powder cleaning production line and for their automatic positioning and fixing on the powder cleaning table. Working in conjunction with AGV trolleys and gantry robots, it completes the handling and gripping of workpieces of different models and sizes during automated loading and unloading, and facilitates rapid alignment, connection, and fixing of workpieces on the powder cleaning machine's workbench. The daughter plate can mount different types and sizes of workpieces, and is clamped into place in one go with the mother plate, avoiding repetitive operations of finding zero points and re-clamping different workpieces, significantly improving processing efficiency. A certain radial and angular deviation is allowed during positioning and clamping, offering advantages for both automated and manual loading and unloading. After assembly, the daughter plate and workpiece can be used with AGV trolleys and gantry robots for various forms of workpiece handling, increasing flexibility compared to manual production lines that can only use overhead cranes. It can be applied not only to powder cleaning machine workbenches but also to other automated production line equipment requiring automatic workpiece positioning and fixing.

[0020] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the present invention. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of a powder cleaning machine according to an embodiment of the present invention;

[0022] Figure 2 This is a schematic diagram of a workpiece positioning mother-daughter plate structure according to an embodiment of the present invention;

[0023] Figure 3 for Figure 2 Exploded view;

[0024] Figure 4 This is a cross-sectional view of a workpiece positioning mother-daughter plate structure according to an embodiment of the present invention;

[0025] Figure 5 for Figure 4 Enlarged view of Part I;

[0026] Figure 6 This is a schematic diagram of a sub-plate structure according to an embodiment of the present invention;

[0027] Figure 7 This is a cross-sectional view of a sub-plate according to an embodiment of the present invention;

[0028] Figure 8A This is a schematic diagram of a tensioning pin structure according to an embodiment of the present invention;

[0029] Figure 8B for Figure 7 Enlarged view of part K;

[0030] Figure 9 This is a schematic diagram of the motherboard structure according to an embodiment of the present invention;

[0031] Figure 10 This is a schematic diagram of the zero-point positioning module structure according to an embodiment of the present invention;

[0032] Figure 11 for Figure 10 AA section view;

[0033] Figure 12A This is a schematic diagram of the workpiece positioning mother-daughter plate structure and its cooperation with the AGV trolley according to an embodiment of the present invention;

[0034] Figure 12B for Figure 12A The main view;

[0035] Figure 12C for Figure 12A Side view;

[0036] Figure 13 This is a schematic diagram of the workpiece positioning mother-daughter plate structure and the gantry robot in one embodiment of the present invention.

[0037] Among them, the attached figures are labeled

[0038] 1 rack

[0039] 2 Powder cleaning station

[0040] 3 Horizontal Rotary Axis Positioning Mechanism

[0041] 4. Swing axis

[0042] 5. Workpiece positioning mother-daughter plate structure

[0043] 51 Sub-board

[0044] 511 Threaded hole

[0045] 512 pin hole

[0046] 513 Groove

[0047] 52 Motherboard

[0048] 521 Groove

[0049] 53. Tensioner pin

[0050] 54 Guide pins

[0051] 541 Round base

[0052] 55 Zero-point positioning module

[0053] 551 Tighten the positioning plate

[0054] 552 Clamping Mechanism

[0055] 553 Piston Drive Mechanism

[0056] 554 self-locking spring

[0057] 555 endotracheal inlet

[0058] 56 Detection Switch

[0059] 6 AGV carts

[0060] 61 Support Block

[0061] 7. Truss robot Detailed Implementation

[0062] The structural and working principles of the present invention will be described in detail below with reference to the accompanying drawings:

[0063] See Figure 1 , Figure 1 This is a schematic diagram of a powder cleaning machine according to an embodiment of the present invention. The powder cleaning machine of the present invention includes a frame 1 and a powder cleaning table 2 mounted on the frame 1, a horizontal rotation axis positioning mechanism 3, a swing axis 4, and a workpiece positioning mother-daughter plate structure 5. The workpiece positioning mother-daughter plate structure 5 can cooperate with the AGV trolley 6 and the gantry robot 7 to ensure that the workpiece does not deviate or fall during the handling and gripping process, and can adapt to the working environment of 360° rotation of the powder cleaning worktable, dust, vibration, etc., while having high positioning accuracy. Since the composition, structure, mutual positional relationship, connection relationship, and function of other parts of the powder cleaning machine are all mature existing technologies, they will not be described in detail here. Only the workpiece positioning mother-daughter plate structure 5 of the present invention will be described in detail below.

[0064] See Figures 2-5 , Figure 2 This is a schematic diagram of the workpiece positioning mother-daughter plate structure 5 according to an embodiment of the present invention. Figure 3 for Figure 2 Explosion diagram, Figure 4 This is a cross-sectional view of the workpiece positioning mother-daughter plate structure 5 according to an embodiment of the present invention. Figure 5 for Figure 4Enlarged view of part I. The workpiece positioning mother-daughter plate structure 5 of the powder cleaning machine of the present invention includes: a mother plate 52, which is installed on the powder cleaning table 2 of the powder cleaning machine. The top of the mother plate 52 is provided with a zero-point positioning module 55 and a guide pin 54. The guide pin 54 is used to control the relative position deviation to facilitate the introduction of the zero-point positioning module 55. The zero-point positioning module 55 is connected to the air source and the control system of the powder cleaning machine respectively, and switches between open and closed positions as the air source is turned on or off; a daughter plate 51, which is provided at the bottom with a zero-point positioning module... The tensioning pin 53 of the block 55 is adapted to quickly position and fix it with the mother plate 52; the top of the daughter plate 51 is provided with threaded holes 511 for installing substrates of different sizes; and a detection switch 56 is installed on the mother plate 52 and connected to the control system of the cleaning machine to detect whether the mother plate 52 and the daughter plate 51 are connected in place and to determine the operating status of the cleaning table 2. When it is detected that the mother plate 52 and the daughter plate 51 are not connected in place or the cleaning table 2 is operating abnormally, it will immediately stop and alarm.

[0065] The positioning accuracy of the guide pin 54 in this embodiment is ±2 mm. The guide pin 54 includes a cylindrical pin and a diamond pin, which are disposed on the horizontal center line of the sub-plate 51 and symmetrical to the vertical center line of the sub-plate 51. The sub-plate 51 is provided with corresponding pin holes 512. The bottom of both the cylindrical pin and the diamond pin is provided with a circular base 541.

[0066] See Figures 6-8B , Figure 6 This is a schematic diagram of the sub-board 51 structure according to an embodiment of the present invention. Figure 7 This is a cross-sectional view of sub-plate 51 according to an embodiment of the present invention. Figure 8A This is a schematic diagram of the tensioning nail 53 according to an embodiment of the present invention. Figure 8B for Figure 7The enlarged view of part K is shown. The top of the sub-board 51 is provided with threaded holes 511 that match substrates of different sizes, used for mounting and fixing workpieces with substrates. A set of tensioning pins 53 are installed at the bottom of the sub-board 51, used to cooperate with the zero-point positioning module 55 of the mother board 52 for rapid positioning and fixing. In this embodiment, the top of the sub-board 51 is provided with two types of threaded holes 511 and one type of pin hole 512. Four M24 threaded holes 511 are used to install lifting rings, and the M12 threaded holes 511 are mounting threaded holes that match the substrates, their distribution corresponding to the positions of holes on different substrate models. Taking substrates A, B, and C as examples, four threaded holes 511 with a central symmetry and a spacing of 460mm are provided on sub-board 51 for mating with substrate A; four threaded holes 511 with a central symmetry and a spacing of 560mm are provided on sub-board 51 for mating with substrate B; eight threaded holes 511 with symmetry about the transverse centerline and a spacing of 280mm and 780mm respectively, and with symmetry about the longitudinal centerline and a spacing of 780mm and 280mm respectively, are provided on sub-board 51 for mating with substrate C; two pin holes 512 are provided in the middle of sub-board 51 for positioning in conjunction with guide pins 54 on motherboard 52.

[0067] Because the shapes of the workpieces on the substrate vary, their centers of gravity are different. Furthermore, the automated gripper experiences repeated positioning deviations during each handling operation. This can lead to radial and angular deviations when the gripper places the sub-board 51 onto the motherboard 52. The insertion radius of the tensioning pin 53 ensures a fast and safe connection even under tilted angles and eccentricities. Both the end of the tensioning pin 53 and the entrance to the positioning hole of the zero-point positioning module 55 have a large taper. When the sub-board 51 is lowered, the tapered tip of the tensioning pin 53 first contacts the tapered entrance edge of the positioning hole. Due to the inclined contact, a normal force is generated at the contact point. This normal force can be decomposed into radial and axial components. The radial force pushes the tensioning pin 53 towards the center of the positioning hole, correcting eccentricity; the axial force pulls the tensioning pin 53 downwards, correcting tilt. When the initial eccentricity between the tension pin 53 and the zero-point positioning module 55 is within the maximum allowable initial eccentricity range, the tapered guiding mechanism will continue to function until the tension pin 53 is concentric with the positioning hole and is clamped by the clamping block.

[0068] See Figure 9 , Figure 9This is a schematic diagram of the mother plate 52 according to an embodiment of the present invention. In this embodiment, the mother plate 52 is fixed on the powder cleaning table 2, and a set of guide pins 54 are provided on its top. Before the mother and daughter plates 52 are joined, the guide pins 54 provide initial coarse guidance, controlling the relative positional deviation to prevent it from affecting the zero-point positioning device. The coarse guidance positioning accuracy is controlled to approximately ±2 mm. Two guide pins 54 are distributed on the horizontal center line of the daughter plate 51 and are symmetrical about the vertical center line of the daughter plate 51. The distance between the two pins is 400 mm, and they are aligned with the positioning hole of the zero-point positioning module 55. Preferably, one guide pin is cylindrical and the other is diamond-shaped. This positioning and guiding method has the advantages of high positioning accuracy and avoiding over-positioning. The guide pins 54 are preferably made of 45# steel. After heat treatment (quenching + tempering), the metal hardness and toughness of the guide pins 54 are further increased, allowing them to withstand certain external impacts. Both guide pins 54 have a circular base with a diameter of 100 mm at their bottom.

[0069] Meanwhile, a set of zero-point positioning modules 55 are installed on the top of the mother plate 52 and cooperate with the tensioning nails 53 on the daughter plate 51. When the air source is connected, the zero-point positioning module 55 opens the tensioning nails 53 and enters. After the air source is disconnected, the working process begins, and the zero-point positioning module 55 closes and clamps the tensioning nails 53.

[0070] See Figure 10 and Figure 11 , Figure 10 This is a schematic diagram of the zero-point positioning module 55 according to an embodiment of the present invention. Figure 11 This is a cross-sectional view of a zero-point positioning module 55 according to an embodiment of the present invention. In this embodiment, the zero-point positioning module 55 includes a tensioning positioning plate 551, a latching mechanism 552, a piston driving mechanism 553, and a sensor. The bottom axis of the tensioning positioning plate 551 is provided with an air pipe interface 555 for connecting to an air pipe, preferably a threaded hole. The piston driving mechanism 553 is connected to the latching mechanism 552 and an air source. When the air source is opened, the piston driving mechanism 553 drives the latching mechanism 552 to open. After the tensioning pin 53 enters, the air source is disconnected, and the piston driving mechanism 553 drives the latching mechanism 552 to self-lock. The zero-point positioning module 55 uses a strong self-locking spring 554 to push the piston of the piston driving mechanism 553 to drive the latch of the latching mechanism 552 to lock the tensioning pin 53.

[0071] The zero-point positioning module 55 in this embodiment also includes a turbocharger mechanism, which increases the clamping force by compressing air and adapts to the rotation of the powder cleaning table 2 at various angles. The zero-point positioning module 55 relies on a powerful self-locking spring 554 to push the piston, which drives the latch to lock the tensioning pin 53. Its pull-down force is 8kN. To enhance the pull-down force, the zero-point positioning module 55 is also equipped with a turbocharger mechanism, which increases the power by compressing air. Compared with the pure clamping force generated by the force of the self-locking spring 554 alone, the turbo function increases the pull-down force by 3.5 times (achieving a maximum of 28kN). Therefore, this mother-daughter plate structure can withstand a workpiece of at least 2t and can adapt to the rotation of the powder cleaning table 2 at various angles.

[0072] The zero-point positioning module 55 is preferably a tensioning positioning plate 551. This module includes a tensioning positioning plate 551, a latching mechanism 552, a piston drive mechanism 553, and a sensor. A threaded hole is provided at the bottom axis of the tensioning positioning plate 551 to connect to an air pipe. By connecting an air source, the piston drive mechanism 553 is driven to open the latching mechanism 552. After the tensioning pin 53 enters, the air source is disconnected, and a self-locking spring 554 pushes the piston to drive the latching mechanism 552 to self-lock. This "one-sided, two-pin" positioning method can accurately position and lock the sub-plate 51 and the workpiece assembly. The zero-point positioning module 55 has a pulling force of up to 28 kN, can adapt to various angles of rotation of the powder cleaning table 2, has a repeatability accuracy of less than 5 μm, and has a built-in blowing function to prevent dust from entering and affecting the positioning accuracy. In the "one surface and two pins" configuration, the "two pins" refer to the two diagonally opposite tension pins 53 installed at the bottom of the sub-plate 51, which serve a positioning function and restrict the movement of the zero-point positioning module 55 along the X and Y axes and its rotation around the Z axis; the "one surface" refers to the contact surface on which the zero-point positioning module 55 is installed on the mother plate 52, which restricts the movement of the zero-point positioning module 55 along the Z axis and its rotation around the X and Y axes.

[0073] A detection switch 56 is installed on the motherboard 52 to detect whether the motherboard and daughterboard 52 are properly connected and to determine the operating status of the powder cleaning table 2. When a loose connection or abnormal condition is detected, it can immediately stop the system and transmit an alarm signal. In this embodiment, the detection switch 56 is preferably a short ball-bearing rocker arm type limit switch, including a drive rod, terminals, terminal protective covers, wire ports, a built-in switch, a switch housing, and a head. When the object being measured moves to a specific position, the mechanical part triggers the relevant internal structure of the switch to bring it closer to or separate it, causing the contacts to close or open, thus detecting the position and controlling the circuit. When the daughterboard 51 is connected to or separated from the motherboard 52, the corresponding contacts of the detection switch 56 close or open to control the corresponding circuit to achieve position detection and alarm. The motherboard 52 is equipped with two detection switches 56. When the contacts of the two detection switches 56 are triggered and closed simultaneously, the control system determines that the daughterboard 51 and the motherboard 52 are connected in place; otherwise, the control system determines that there is an abnormality in the position and stops automatic operation, while outputting alarm information to the human-machine interface and controlling the buzzer and / or indicator light to alarm.

[0074] Four tensioning pins 53 are installed on the sub-board 51, serving as both cylindrical and diamond-shaped positioning devices, thus providing over-positioning. Furthermore, all mating contact surfaces between the zero-point positioning module 55 and the tensioning pins 53 are machined using ultra-precision CNC machining, with dimensional tolerances, roundness, and flatness all within 1~2μm, achieving a repeatability accuracy of less than 5μm. A through hole is provided at the bottom axis of the tensioning positioning disc 551, allowing air to be introduced into the internal structure via a threaded connector. Parameters such as the purging time can be set on the HMI (Human Machine Interface), and the air-blowing operation is controlled by a PLC.

[0075] See Figure 12A-13 , Figure 12A This is a schematic diagram of the workpiece positioning mother-daughter plate structure 5 and the AGV trolley 6 in one embodiment of the present invention. Figure 12B for Figure 12A The main view, Figure 12C for Figure 12A Side view, Figure 13This is a schematic diagram illustrating the interaction between the workpiece positioning mother-daughter plate structure 5 and the gantry robot 7 according to an embodiment of the present invention. In this embodiment, the mother plate 52 is fixed on the powder cleaning table 2, and the daughter plate 51 is equipped with a workpiece with a substrate. When the robot places the daughter plate 51 on the mother plate 52, the daughter plate 51 and the mother plate 52 are positioned and secured by the guide pin 54 and the zero-point positioning module 55. First, sensors are installed in all four zero-point positioning modules 55. The zero-point positioning module 55 will only send a signal to the control system after clamping the tensioning pin 53. Second, the two detection switches 56 on the mother plate 52 will further determine the connection status of the daughter plate 51 and the mother plate 52. When the daughter plate 51 is not installed in place, the contacts of the two detection switches 56 on the mother plate 52 are always in the open state. Only when the daughter plate 51 and the mother plate 52 are connected in place will the drive rods on the two detection switches 56 simultaneously drive the contacts on the switches to close the contacts and send a signal to the control system. Therefore, the control system will determine that the daughter plate 51 and the mother plate 52 are connected in place before proceeding to the next step. Two detection switches 56 are installed on the motherboard 52. The control system (preferably a PLC system) will determine that the motherboard 52 is connected in place only when the contacts of both switches are triggered and closed at the same time. When the daughterboard 51 and the motherboard 52 are not connected in place and only one contact is triggered, the PLC system will determine that there is an abnormality in the position and stop the automatic operation process. At the same time, it will output alarm information to the human-machine interface and control the buzzer and indicator light to emit alarm information.

[0076] The workpiece positioning mother-daughter plate structure 5 of the present invention allows for the installation of workpieces of different types and sizes on the daughter plate 51, which is then clamped into place in one go with the mother plate 52. This avoids the repetitive operation of finding the zero point and re-clamping different workpieces, significantly improving processing efficiency. A certain radial and angular deviation is allowed during positioning and clamping, which is advantageous for both automated and manual loading and unloading. After assembly, the daughter plate 51 can be used with the AGV trolley 6 and the gantry robot 7 to transport the workpiece in various ways, increasing the flexibility of the production process compared to the manual production line which can only be used with overhead cranes. After assembly, the daughter plate 51 is transported to the loading station by the AGV trolley 6. A support block 61, identical in shape to the zero-point positioning module 55, is installed on the material support of the AGV trolley 6. Therefore, when the daughter plate 51 is placed on the AGV trolley 6, the tensioning nail 53 and the support block 61 cooperate to initially position the daughter plate 51, ensuring that the daughter plate 51 and the workpiece assembly do not shift or fall during transportation. After the workpiece is delivered to the loading station, the gantry robot 7 transports the sub-plate 51 and the workpiece assembly to the mother plate 52. The mother plate 52 is fixed on the powder cleaning table 2. The sub-plate 51 has grooves 513 on both sides for the robot to grip. The mother plate 52 has grooves 521 corresponding to the grooves 513.

[0077] The workpiece positioning mother-daughter plate structure 5 of the present invention is used for the automatic positioning and fixing of workpieces on the cleaning table 2 in an automated powder handling production line. This workpiece positioning mother-daughter plate structure 5 can be applied not only to powder cleaning machines, but also to other automated production line equipment that requires automatic positioning and fixing of workpieces. It is suitable for most production lines that require repeated and precise positioning of workpieces. For example, in a laser processing production line, the workpiece to be processed can be fixed to the daughter plate 51, and the mother plate 52 can be fixed to the processing area of ​​the laser operating table. After the mother-daughter plate 52 is installed in place, the workpiece can be immediately engraved, welded and other operations, avoiding manual repeated fixing and adjustment of the workpiece. In a large injection molding machine production line, it is necessary to frequently change the molds of different products. The manual alignment and tightening of bolts is time-consuming and laborious. Therefore, by fixing the back of the mold to the daughter plate 51 and fixing the mother plate 52 to the injection molding machine, the positioning of the mold can be completed by the precise positioning and fixing of the mother-daughter plate 52, and the risk of workers operating under the mold in the traditional mode can be avoided.

[0078] Of course, the present invention may have other various embodiments. Without departing from the spirit and essence of the present invention, those skilled in the art can make various corresponding changes and modifications according to the present invention, but these corresponding changes and modifications should all fall within the protection scope of the appended claims.

Claims

1. A workpiece positioning mother-daughter plate structure for a powder cleaning machine, characterized in that, include: A mother plate is installed on the cleaning table of the cleaning machine. The top of the mother plate is equipped with a zero-point positioning module and a guide pin. The guide pin is used to control the relative position deviation to facilitate the introduction of the zero-point positioning module. The zero-point positioning module is connected to the air source and the control system of the cleaning machine, and switches between open and closed positions as the air source is turned on or off. The sub-board has a tensioning pin at the bottom that is compatible with the zero-point positioning module, so as to quickly position and fix it with the mother board; the top of the sub-board has threaded holes for mounting substrates of different sizes. as well as A detection switch is installed on the motherboard and connected to the control system of the cleaning machine. It is used to detect whether the motherboard and the daughterboard are connected in place and to determine the operating status of the cleaning table. When it is detected that the motherboard and the daughterboard are not connected in place or the cleaning table is operating abnormally, it will immediately stop and alarm.

2. The workpiece positioning mother-daughter plate structure of the powder cleaning machine as described in claim 1, characterized in that, The positioning accuracy of the guide pin is ±2 mm.

3. The workpiece positioning mother-daughter plate structure of the powder cleaning machine as described in claim 1, characterized in that, The guide pin includes a cylindrical pin and a diamond-shaped pin, which are disposed on the horizontal center line of the sub-plate and are symmetrical to the vertical center line of the sub-plate.

4. The workpiece positioning mother-daughter plate structure of the powder cleaning machine as described in claim 3, characterized in that, Both the cylindrical pin and the diamond pin have a circular base at their bottom.

5. The workpiece positioning mother-daughter plate structure of the powder cleaning machine as described in claim 1, characterized in that, The zero-point positioning module includes a tensioning positioning plate, a latching mechanism, a piston driving mechanism, and a sensor. The bottom axis of the tensioning positioning plate is provided with an air pipe interface for connecting to an air pipe. The piston driving mechanism is connected to the latching mechanism and an air source respectively. When the air source is opened, the piston driving mechanism drives the latching mechanism to open. After the tensioning pin enters, the air source is disconnected, and the piston driving mechanism drives the latching mechanism to self-lock.

6. The workpiece positioning mother-daughter plate structure of the powder cleaning machine as described in claim 5, characterized in that, The zero-point positioning module uses a powerful self-locking spring to push the piston of the piston drive mechanism, which in turn drives the latch of the latch clamping mechanism to lock the tensioning pin.

7. The workpiece positioning mother-daughter plate structure of the powder cleaning machine as described in claim 5, characterized in that, The zero-point positioning module also includes a turbocharger mechanism, which increases power and clamping force by compressing air, and adapts to the rotation of the powder cleaning table at various angles.

8. The workpiece positioning mother-daughter plate structure of the powder cleaning machine as described in claim 1, characterized in that, The detection switch is a short ball-bearing rocker type detection switch. When the sub-board is connected to or separated from the motherboard, the corresponding contacts of the detection switch close or open to control the corresponding circuit to realize position detection and alarm.

9. The workpiece positioning mother-daughter plate structure of the powder cleaning machine as described in claim 8, characterized in that, Two detection switches are installed on the motherboard. When the contacts of the two detection switches are triggered and closed simultaneously, the control system determines that the daughterboard and the motherboard are connected in place; otherwise, the control system determines that there is an abnormality in the position and stops automatic operation, while outputting alarm information to the human-machine interface and controlling the buzzer and / or indicator light to alarm.

10. A powder cleaning machine, characterized in that, Includes the workpiece positioning mother-daughter plate structure as described in any one of claims 1-9.

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