Positioning Component of a Sculpting and Milling Machine

Abstract

The present invention provides a positioning component for a carving and milling machine, belonging to the technical field of machining equipment. It solves the problem of low positioning accuracy of existing carving and milling machines for wood. For the positioning component of this carving and milling machine, the carving and milling machine includes a machine frame and a gantry. A processing component is provided on the gantry, and a processing platform is provided on the machine frame. A three-dimensional translation is formed between the processing component and the processing platform. The positioning component includes a mounting frame arranged on the processing platform. A rotatable turntable is connected to the mounting frame. Two movable clamping blocks capable of moving are arranged on the turntable. A driving component capable of driving the movable clamping blocks to move is also arranged on the turntable. The moving directions of the two movable clamping blocks are perpendicular to each other. Two fixed clamping blocks are also fixed on the turntable. The two fixed clamping blocks are respectively opposite to the two movable clamping blocks, and a clamping opening is formed between the two movable clamping blocks and the two fixed clamping blocks. The positioning component of this carving and milling machine can improve the positioning accuracy of wood.

Description

Technical Field

[0001] The present invention belongs to the technical field of machining equipment, and relates to a positioning component of a carving and milling machine. Background Art

[0002] As a kind of positioning component, a chuck is a common mechanical device in the mechanical field for clamping columnar workpieces. Generally, it consists of a chuck body, movable jaws, and a jaw driving mechanism. The jaw driving mechanism drives the radial movement of the movable jaws evenly distributed on the chuck body to clamp and position the workpiece. For example, a chuck disclosed in a patent document (application number: 201821038076.3) includes a chuck body, a jaw driving assembly, and a plurality of movable jaws. The movable jaws are evenly distributed around a central axis. The sliding jaws are slidably arranged in a slideway along the radial direction, and the bottom thereof is matched with a large bevel gear. The bottom of the large bevel gear is matched with a small bevel gear. The small bevel gear drives the large bevel gear to rotate, and the large bevel gear drives the plurality of sliding jaws to move synchronously, so as to clamp the workpiece. Since the movable jaws achieve synchronous movement through the transmission of a plurality of transmission components, there are different assembly clearances between the transmission components. After long-term use, components such as the transmission components and the movable jaws have different degrees of wear, resulting in a decrease in the movement accuracy of the jaws. When there is an error in the movement of an individual jaw, it will cause the reference center of the workpiece to deviate, resulting in low positioning accuracy. This is also the technical problem proposed in the above patent document. The above patent calibrates the reference by setting the movable jaws as split base jaws and replacing jaw blocks, or by adjusting the replacing jaw blocks. However, obviously, frequent adjustment or replacement is rather cumbersome, and manual calibration is also difficult to ensure the accuracy of the reference.

[0003] Since the above defects are mainly caused by excessive transmission components generating assembly clearances, transmission wear, etc., those skilled in the art easily think of reducing the transmission components. For example, a pneumatic flange fixture disclosed in a patent document (201720206503.3) includes a base, a placement plate is arranged on the base, and a plurality of positioning mechanisms are circumferentially arranged around the placement plate. Each positioning mechanism includes a positioning cylinder, a chute, and a top block arranged in the chute. The top block is connected to the piston of the positioning cylinder. The workpiece is positioned by pushing the top block through the positioning cylinder. However, when the top block positions the workpiece, especially when applied to a four-jaw chuck, the acting forces of a plurality of positioning cylinders are opposite to each other. During long-term clamping, there is a possibility of gas leakage in the positioning cylinders. When the air pressure in one positioning cylinder becomes smaller, the acting force of the opposite positioning cylinder will be greater than that of this positioning cylinder, thereby causing the positioning cylinder with a greater acting force to push the workpiece, resulting in workpiece displacement and affecting the positioning accuracy. Summary of the Invention

[0004] The object of the present invention is to address the above problems existing in the prior art and propose a positioning component for a carving and milling machine to solve the problems of low positioning accuracy and poor stability of the existing positioning components.

[0005] The object of the present invention can be achieved by the following technical solutions: A positioning component for a carving and milling machine. The carving and milling machine includes a frame and a gantry. A processing component is provided on the gantry, and a processing platform is provided on the frame. A three-dimensional translation is formed between the processing component and the processing platform. The positioning component includes a mounting frame provided on the processing platform. A rotatable turntable is connected to the mounting frame. Two movable clamping blocks capable of moving are provided on the turntable. A driving member capable of driving the movable clamping blocks to move is also provided on the turntable. The moving directions of the two movable clamping blocks are perpendicular to each other. It is characterized in that two fixed clamping blocks are also fixed on the turntable. The two fixed clamping blocks are respectively opposite to the two movable clamping blocks, and a clamping opening is formed between the two movable clamping blocks and the two fixed clamping blocks.

[0006] The positioning component positions the workpiece on the processing platform. A three-dimensional translation is realized between the processing component and the processing platform, enabling the processing component to perform three-dimensional processing on the workpiece. Since the moving directions of the two movable clamping blocks are perpendicular to each other, the orientations of the two fixed clamping blocks are also perpendicular to each other. The fixed clamping blocks are pre-fixed at appropriate positions according to the size of the workpiece, so that when the workpiece abuts against the two fixed clamping blocks in two different directions respectively, the center of the workpiece coincides with the rotation axis of the turntable. During positioning, the workpiece is inserted into the clamping opening, and then the driving member drives the two movable clamping blocks to move towards their respective opposite fixed clamping blocks until the two fixed clamping blocks respectively press the workpiece against the two fixed clamping blocks from two different directions, realizing the positioning of the workpiece. Compared with the existing positioning components where the jaws need to play both the role of applying clamping force and the role of positioning reference, that is, using the moving force-applying component as the reference, resulting in the movement error affecting the reference accuracy. In this application, since the fixed clamping blocks are pre-fixed and play the role of a backing, the workpiece can be positioned with the two fixed clamping blocks with different orientations as the reference. The movable clamping blocks only need to move and press, that is, the movable clamping blocks providing the clamping force and the fixed clamping blocks for the reference do not affect each other, thereby improving the positioning accuracy. At the same time, the fixed clamping blocks are fixed. During the clamping process, even if the driving force of the driving member on the movable clamping blocks changes, it only affects the clamping force, but the workpiece will not shift, so the clamping stability is higher.

[0007] In the positioning assembly of the above-mentioned engraving and milling machine, the fixed clamp block is locked and fixed on the turntable by fasteners, and the position of the fixed clamp block can be adjusted when the fasteners are loosened. Under the locking action of the fasteners, the fixed clamp block is in a fixed state during the continuous clamping and positioning process of the workpiece, ensuring the positioning stability of the workpiece, and before clamping and positioning, the fasteners can be loosened to adjust the position of the fixed clamp block according to the size of the workpiece, and after adjustment, it is re-locked and fixed by the fasteners, so that when the workpiece is pressed against the fixed clamp block, the center of the workpiece coincides with the rotation axis of the turntable, thereby ensuring positioning accuracy and being suitable for workpieces of different sizes.

[0008] In the positioning assembly of the above-mentioned engraving and milling machine, two slide grooves are provided on the side of the turntable, and the length directions of the two slide grooves are respectively the same as the sliding directions of the two movable clamping blocks. The two fixed clamping blocks are respectively arranged in the two slide grooves and are locked and fixed by respective fasteners. When the fasteners are loosened, the fixed clamping blocks can slide along the slide grooves to adjust the position of the fixed clamping blocks in the moving direction of the movable clamping blocks. After being adjusted in place, the fixed clamping blocks are locked and fixed again by fasteners, thereby determining the reference position in this direction to ensure the positioning accuracy of workpieces of different sizes.

[0009] In the positioning assembly of the above-mentioned engraving and milling machine, the fastener includes a locking bolt, a screw hole is provided on the bottom surface of the slide slot, a through hole with a long strip cross section is provided on the fixed clamp block, and the length direction of the through hole cross section is consistent with the sliding direction of the relative moving clamp block, and the two opposite hole walls of the through hole are provided with limiting convex edges, the locking bolt passes through between the two limiting convex edges and is screwed into the screw hole, and the head of the locking bolt is pressed against the two limiting convex edges. When the locking bolt is loosened, the fixed clamp block can move along the slide slot, that is, the locking bolt moves relative to the fixed clamp block along the length direction of the through hole cross section, and the locking bolt is locked after being adjusted into place, and the locking bolt is pressed against the limiting convex edge, thereby fixing the fixed clamp block. Of course, as another way, a through hole can be provided on the turntable, a screw hole can be provided on the fixed clamp block, and the locking bolt can be screwed into the screw hole of the fixed clamp block after passing through the through hole of the turntable, so as to fix the fixed clamp block.

[0010] In the positioning assembly of the above-mentioned engraving and milling machine, a screw is screwed to one end of the fixed clamping block away from the movable clamping block, the axial direction of the screw is consistent with the moving direction of the relative movable clamping block, a bearing is installed on the turntable, and the outer end of the screw is connected to the bearing. Through the connection of the bearing, the fixed clamping block will not be separated from the turntable or shifted relative to the turntable after the fastener is loosened, and the original position can be maintained, so that the position of the fixed clamping block can be adjusted according to the size change of the workpiece, and the movement of the fixed clamping block is achieved by rotating the screw, and the adjustment stroke control accuracy is high, thereby improving the positioning accuracy.

[0011] In the positioning component of the above-mentioned engraving and milling machine, the turntable is a disc with a central hole. The moving direction of the movable clamping blocks is arranged along the radial direction of the turntable. The two movable clamping blocks and the two fixed clamping blocks are distributed circumferentially along the turntable. The workpiece is columnar and can pass through the clamping opening and the central hole of the turntable. The circumferential distribution of the movable clamping blocks and the fixed clamping blocks ensures the stability when the turntable rotates.

[0012] In the positioning component of the above-mentioned engraving and milling machine, the driving member includes two positioning cylinders. The two positioning cylinders are both fixed on the side surface of the turntable, and the piston rods of the two positioning cylinders extend towards the central hole of the turntable. The two movable clamping blocks are respectively fixed at the ends of the piston rods of the two positioning cylinders. Using positioning cylinders to drive the movable clamping blocks, the positioning cylinders can provide continuous clamping force after the movable clamping blocks clamp the workpiece, ensuring the stability of workpiece positioning.

[0013] In the positioning component of the above-mentioned engraving and milling machine, two air tanks are also fixed on the turntable. The two air tanks are respectively connected to the two positioning cylinders through pipelines, and electromagnetic valves capable of controlling the on-off of the pipelines are provided on the pipelines. Since the turntable needs to rotate after the positioning cylinders clamp the workpiece through the movable clamping blocks, the positioning cylinders need to be disconnected from the external air source. During the long-term processing, the gas inside the positioning cylinders will leak, resulting in a decrease in the clamping force. For this reason, independent air tanks are provided on the turntable in this application. The air tanks can rotate with the turntable. When the workpiece is positioned, the electromagnetic valves control the pipelines to be connected, and the air tanks can provide gas for the positioning cylinders, thereby maintaining the internal air pressure of the positioning cylinders during the processing, and further ensuring a stable clamping force on the workpiece and improving the positioning stability.

[0014] In the positioning component of the above-mentioned engraving and milling machine, the driving member includes two driving motors. Two mounting seats are fixed on the turntable. Telescopic rods are slidably inserted into the mounting seats. One ends of the two telescopic rods extend towards the central hole of the turntable. The two movable clamping blocks are respectively fixed at the ends of the two telescopic rods. A threaded hole is provided at the other end of the telescopic rod. On the mounting seat, a lead screw is rotatably connected, and one end of the lead screw is screwed into the threaded hole of the telescopic rod. The other ends of the two lead screws are respectively in transmission cooperation with the two driving motors through belt pulleys. The driving motors drive the lead screws to rotate through belt pulley transmission. The lead screws drive the telescopic rods to expand and contract, thereby realizing the clamping and release of the workpiece. When clamping, the lead screw and the telescopic rod are self-locked through threaded cooperation, thereby realizing the continuous clamping and positioning of the workpiece.

[0015] In the positioning assembly of the above-mentioned engraving and milling machine, the positioning cylinder is a double-rod positioning cylinder. The two piston rods of the double-rod positioning cylinder are arranged along the center line direction of the turntable. The above-mentioned moving clamping block is fixed at the ends of the two piston rods of the double-rod positioning cylinder. The height of the fixed clamping block along the center line direction of the turntable is the same as the height of the cylinder block of the double-rod positioning cylinder along the center line direction of the turntable. The two piston rods of the double-rod positioning cylinder are arranged along the center line direction of the turntable, so that the moving clamping block has a larger size in the center line direction of the turntable. Therefore, after the workpiece passes through the center hole of the turntable, the moving clamping block and the fixed clamping block can have a larger clamping area with the workpiece, improving the positioning stability.

[0016] In the positioning assembly of the above-mentioned engraving and milling machine, there are two turntables. The two turntables are parallel and fixed. One of the turntables is rotationally connected to the mounting frame. The center holes of the two turntables are opposite. On the disk surface of each turntable, there are two fixed clamping blocks, two moving clamping blocks and a driving member for driving the moving clamping block to move. Similarly, this structural design can increase the clamping area of the workpiece and improve the positioning stability.

[0017] In the positioning assembly of the above-mentioned engraving and milling machine, the turntable is rotationally connected to the mounting frame through a support slewing bearing. A gear ring is circumferentially fixed on the outer ring of the support slewing bearing. A power motor is fixed on the mounting frame. A gear is fixed on the motor shaft of the power motor. The gear meshes with the gear ring. The power motor drives the turntable to rotate through the cooperation of the gear and the gear ring, and the structure is compact and stable.

[0018] Compared with the prior art, the positioning assembly of this engraving and milling machine has the following advantages:

[0019] 1. Since the fixed clamping block is pre-fixed and serves as a backstop, the workpiece can be positioned with the fixed clamping blocks in two different orientations as the reference. The moving clamping block only needs to move and press, that is, the moving clamping block providing the clamping force and the fixed clamping block for the reference do not affect each other, thereby improving the positioning accuracy.

[0020] 2. Since the fixed clamping block is fixed, even if the driving force of the driving member on the moving clamping block changes during the clamping process, it only affects the clamping force, but the workpiece will not shift. Therefore, the clamping stability is higher.

[0021] 3. Since the fixed clamping block is fixed on the turntable by locking bolts, before clamping and positioning, the fasteners can be loosened, and the position of the fixed clamping block can be adjusted according to the size of the workpiece. After the adjustment is in place, it is re-locked and fixed by the fasteners, so that the center of the workpiece coincides with the rotation axis of the turntable when the workpiece is pressed against the fixed clamping block, thereby ensuring the positioning accuracy and being applicable to workpieces of different sizes. Brief Description of the Drawings

[0022] Figure 1 is a three-dimensional structural schematic diagram of the engraving and milling machine.

[0023] Figure 2 It is a schematic three-dimensional structure diagram of the positioning component.

[0024] Figure 3 It is a front view of the structure of the positioning component.

[0025] Figure 4 It is Figure 3 A sectional view of the structure at A-A in

[0026] Figure 5 It is a schematic three-dimensional structure diagram of the positioning component in the second embodiment.

[0027] Figure 6 It is a schematic three-dimensional structure diagram of the positioning component in the third embodiment.

[0028] Figure 7 It is a schematic three-dimensional structure diagram of the positioning component in the fourth embodiment.

[0029] Figure 8 It is a schematic three-dimensional structure diagram of the positioning component in the fifth embodiment.

[0030] Figure 9 It is a schematic three-dimensional structure diagram of the positioning component in the fifth embodiment from another perspective.

[0031] In the figure, 1. mounting frame; 11. power motor; 111. gear; 2. turntable; 21. central hole; 22. chute; 23. bearing; 24. mounting seat; 25. telescopic rod; 26. lead screw; 27. gear ring; 28. electrical connection post; 29. sealing ring; 20. push cylinder; 3. moving clamping block; 4. fixed clamping block; 41. through hole; 42. limiting flange; 43. screw; 5. clamping opening; 6. locking bolt; 7. positioning cylinder; 8. driving motor; 9. air tank; 91. solenoid valve; 92. pipeline; 93. check valve; 101. frame; 102. gantry; 103. vertical carriage; 104. bracket; 105. tool holder; 106. processing component; 107. longitudinal carriage; 108. processing platform. Detailed implementation manners

[0032] The following are specific embodiments of the present invention in combination with the accompanying drawings to further describe the technical solutions of the present invention, but the present invention is not limited to these embodiments.

[0033] Embodiment 1:

[0034] As Figure 1As shown in the figure, the positioning component of the engraving and milling machine. The engraving and milling machine includes a machine frame 101 and a gantry 102 fixed on the machine frame. On both columns of the gantry 102, vertical sliding plates 103 are slidably connected along the vertical direction. On both vertical sliding plates 103, brackets 104 are fixed. Between the two brackets 104, a long strip-shaped tool holder 105 is rotatably connected. The tool holder 105 is arranged horizontally. There are multiple groups of processing components 106, and each group of processing components 106 includes a processing motor and a tool head. The processing motor is fixed on the tool holder 105, and the tool head is installed on the processing motor. The processing motor can be a double-rod motor. By rotating the tool holder 105, the tool head can be rotated or the tool can be changed. On the machine frame 101, a longitudinal sliding frame 107 is slidably connected along the longitudinal direction. On the longitudinal sliding frame 107, a processing platform 108 is slidably connected along the horizontal direction. The vertical sliding plates 103, the longitudinal sliding frame 107, and the processing platform 108 are all driven by servo motors and lead screw nut assemblies. Of course, in the actual design process, the processing platform 108 can be fixed on the machine frame 101, the gantry 102 is slidably connected to the machine frame 101 along the longitudinal direction of the machine frame 101. At the same time, a horizontal sliding plate is slidably connected to the vertical sliding plate 103 along the horizontal direction, and the tool holder 105 is connected to the horizontal sliding plate, which can also realize the three-dimensional translation between the processing component 106 and the processing platform 108; or the processing platform 108 can be slidably connected to the machine frame 101 along the longitudinal direction, the gantry 102 is fixedly arranged, and at the same time, a horizontal sliding plate is slidably connected to the vertical sliding plate 103 along the horizontal direction, and the tool holder 105 is connected to the horizontal sliding plate, which can also realize the three-dimensional translation between the processing component 106 and the processing platform 108.

[0035] Combined with Figure 2 、 Figure 3 、 Figure 4As shown in the figure, the positioning component includes a plate-shaped mounting bracket 1 and a disc-shaped turntable 2. The mounting bracket 1 is fixed on the processing platform. The center of the turntable 2 has a central hole 21. The turntable 2 is rotationally connected to one side of the mounting bracket 1 through a supporting slewing bearing, and the turntable 2 is parallel to the mounting bracket 1. A gear ring 27 is sleeved outside the supporting slewing bearing. A power motor 11 is fixed on the other side of the mounting bracket 1. The motor shaft of the power motor 11 passes through the mounting bracket 1, and a gear 111 is fixed at the end of the motor shaft. The gear 111 meshes with the gear ring 27. Two positioning cylinders 7 are fixed on the side surface of the turntable 2. The two positioning cylinders 7 are both double-rod positioning cylinders. The plane where the two piston rods of the positioning cylinder 7 are located is parallel to the side surface of the turntable 2. The piston rods of the two positioning cylinders 7 both extend towards the central hole 21, and moving clamping blocks 3 are fixed at the ends of the piston rods of the two positioning cylinders 7. The telescopic movement of the piston rods of the positioning cylinder 7 can drive the two moving clamping blocks 3 to move along the radial direction of the turntable 2, and the moving directions of the two moving clamping blocks 3 are perpendicular to each other. Two fixed clamping blocks 4 are also fixed on the side surface of the turntable 2. The two fixed clamping blocks 4 are both strip-shaped, and one end of each fixed clamping block 4 extends towards the central hole 21 along the radial direction of the turntable 2. The end faces of the two fixed clamping blocks 4 extending into the central hole 21 are respectively opposite to the end faces of the two moving clamping blocks 3, that is, the two moving clamping blocks 3 and the two fixed clamping blocks 4 are distributed along the circumferential direction of the turntable 2. A clamping opening 5 is formed between the two moving clamping blocks 3 and the two fixed clamping blocks 4.

[0036] The fixed clamping block 4 is fixed on the turntable 2 through a locking bolt 6. Specifically, two radially arranged sliding grooves 22 are formed on the side surface of the turntable 2. The length directions of the two sliding grooves 22 are respectively the same as the sliding directions of the two moving clamping blocks 3. A threaded hole is formed on the bottom surface of the sliding groove 22. A through hole 41 with a strip-shaped cross-section is formed on the fixed clamping block 4, and the length direction of the cross-section of the through hole 41 is consistent with the sliding direction of the opposite moving clamping block 3. Limiting convex edges 42 are provided on the two opposite hole walls of the through hole 41. The fixed clamping block 4 abuts against the inside of the sliding groove 22, that is, the bottom surface of the fixed clamping block 4 fits on the bottom surface of the sliding groove 22, and the two side surfaces of the fixed clamping block 4 are in contact with the two groove walls of the sliding groove 22. The locking bolt 6 passes through between the two limiting convex edges 42 and is screwed into the threaded hole, and the head of the locking bolt 6 presses against the two limiting convex edges 42. When the locking bolt 6 is loosened, the fixed clamping block 4 can move along the sliding groove 22 to adjust the position. When the locking bolt 6 is tightened, the fixed clamping block 4 can be fixed on the turntable 2. A screw rod 43 is screwed at one end of the fixed clamping block 4 away from the moving clamping block 3. The axial direction of the screw rod 43 is consistent with the moving direction of the opposite moving clamping block 3. A bearing 23 is installed on the turntable 2. The outer end of the screw rod 43 is connected to the bearing 23. When the locking bolt 6 is loosened, the movement of the fixed clamping block 4 can be realized by rotating the screw rod 43.

[0037] Embodiment 2:

[0038] This positioning component is basically the same as that in Embodiment 1, and the differences are as follows Figure 5As shown in the figure, two driving motors 8 and two mounting seats 24 are fixed on the turntable 2. Telescopic rods 25 are slidably inserted into the mounting seats 24. The two telescopic rods 25 are arranged along the radial direction of the turntable 2 and are perpendicular to each other. One end of each of the two telescopic rods 25 extends towards the central hole 21 of the turntable 2. Two moving clamping blocks 3 are respectively fixed at the ends of the two telescopic rods 25. A threaded hole is formed at the other end of the telescopic rod 25. A lead screw 26 is rotatably connected to the mounting seat 24. One end of each of the two lead screws 26 is screwed into the threaded hole of the corresponding telescopic rod 25, and the other ends are respectively in transmission cooperation with the two driving motors 8 through belt pulleys. An electrical connection post 28 is also fixed on the turntable 2. The electrical connection post 28 is electrically connected to the driving motor 8. When the turntable 2 rotates to a set position, the electrical connection post 28 can contact the power supply connector on the mounting frame 1 to supply power to the driving motor 8.

[0039] Embodiment Three:

[0040] This positioning component is basically the same as that in Embodiment One, and the difference is as Figure 6 shown in the figure. The two piston rods of the positioning cylinder 7 are arranged along the center line direction of the turntable 2. The moving clamping block 3 is fixed at the ends of the two piston rods of the double-rod positioning cylinder. The moving clamping block 3 is strip-shaped, and the length direction of the moving clamping block 3 is arranged along the center line direction of the turntable 2. The height of the fixed clamping block 4 along the center line direction of the turntable 2 is the same as the height of the cylinder body of the double-rod positioning cylinder along the center line direction of the turntable 2.

[0041] Embodiment Four:

[0042] This positioning component is basically the same as that in Embodiment One, and the difference is as Figure 7 shown in the figure. There are two turntables 2. The two turntables 2 are parallel and fixed. One of the turntables 2 is rotatably connected to the mounting frame 1. The central holes 21 of the two turntables 2 are opposite to each other. On the disk surface of each turntable 2, there are two fixed clamping blocks 4, two moving clamping blocks 3 and a driving member for driving the moving clamping block 3 to move.

[0043] Embodiment Five:

[0044] This positioning component is basically the same as that in Embodiment One, and the difference is as Figure 8 、 Figure 9As shown, two gas cylinders 9 are also fixed on the turntable 2. The two gas cylinders 9 are respectively communicated with the two positioning cylinders 7 through pipelines 92, and the gas cylinders 9 can be connected with an external air source through the pipelines 92. A check valve 93 is connected to the pipeline 92 for the gas cylinder 9 to be connected with the external air source. An electromagnetic valve 91 capable of controlling the on-off of the pipeline is provided on the pipeline 92 connecting the gas cylinder 9 and the positioning cylinder 7. An installation hole is formed in the turntable 2, and the end of the pipeline 92 for connecting the air source is inserted into the installation hole. A sealing ring 29 is also fixed at the orifice of the installation hole. A pushing cylinder 20 is fixed on the installation frame 1. The piston rod of the pushing cylinder 20 passes through the installation frame 1 and faces the turntable 2, and the turntable 2 can rotate to make the installation hole face the front end of the piston rod of the pushing cylinder 20. The piston rod of the pushing cylinder 20 is tubular, and the air pipe of the air source is connected to the rear end of the piston rod. When positioning is required, the turntable 2 is rotated to make the piston rod of the pushing cylinder 20 face the installation hole. The piston rod extends out and abuts against the sealing ring 29 to form a seal. Then the air source fills the gas cylinder 9 with gas. When rotating, the gas cylinder 9 can rotate together with the turntable 2. When the workpiece is positioned, the electromagnetic valve 91 controls the pipeline 92 to be communicated, and the gas cylinder 9 can provide gas for the positioning cylinder 7, so as to maintain the internal air pressure of the positioning cylinder 7 during the processing.

[0045] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Those skilled in the art of the present invention can make various modifications or supplements to the described specific embodiments or use similar ways to replace them, but will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0046] Although terms such as installation frame 1, power motor 11, gear 111, etc. are used more in this article, the possibility of using other terms is not excluded. Using these terms is only to more conveniently describe and explain the essence of the present invention; interpreting them as any additional limitation is contrary to the spirit of the present invention.

Claims

1. Positioning component of a carving and milling machine. The carving and milling machine includes a frame (101) and a gantry (102). A processing component (106) is provided on the gantry (102), and a processing platform (108) is provided on the frame (101). A three-dimensional translation is formed between the processing component (106) and the processing platform (108). The positioning component includes a mounting bracket (1) provided on the processing platform (108). A rotatable turntable (2) is connected to the mounting bracket (1). Two movable clamping blocks (3) are provided on the turntable (2). A driving member capable of driving the movable clamping blocks (3) to move is also provided on the turntable (2). The moving directions of the two movable clamping blocks (3) are perpendicular to each other. It is characterized in that, Two fixed clamping blocks (4) are also fixed on the turntable (2). The two fixed clamping blocks (4) are respectively opposite to the two movable clamping blocks (3), and a clamping opening (5) is formed between the two movable clamping blocks (3) and the two fixed clamping blocks (4); the driving member includes two positioning cylinders (7), and both of the two positioning cylinders (7) are fixed on the side surface of the turntable (2). Two air tanks (9) are also fixed on the turntable (2), and the two air tanks (9) are respectively connected to the two positioning cylinders (7) through pipelines (92); an installation hole is formed in the turntable (2) for the end of the pipeline (92) connecting to the air source to be inserted into the installation hole. A sealing ring (29) is also fixed at the orifice of the installation hole. A pushing cylinder (20) is fixed on the installation frame (1). The piston rod of the pushing cylinder (20) passes through the installation frame (1) and faces the turntable (2). The piston rod of the pushing cylinder (20) is tubular. When the turntable (2) rotates to make the piston rod of the pushing cylinder (20) opposite to the installation hole, the piston rod can extend out and abut against the sealing ring (29) to form a seal.

2. The positioning assembly of the engraving and milling machine according to claim 1, wherein, The fixed clamping block (4) is locked and fixed on the turntable (2) through a fastener, and the position of the fixed clamping block (4) can be adjusted when the fastener is loosened.

3. The positioning assembly of the engraving and milling machine according to claim 2, characterized in that, Two sliding grooves (22) are formed on the side surface of the turntable (2). The length directions of the two sliding grooves (22) are respectively the same as the sliding directions of the two movable clamping blocks (3). The two fixed clamping blocks (4) are respectively arranged in the two sliding grooves (22) and are locked and fixed through their respective fasteners.

4. The positioning component of the engraving and milling machine according to claim 3, characterized in that The fastener includes a locking bolt (6). A threaded hole is formed on the bottom surface of the sliding groove (22). A through hole (41) with a long-strip-shaped cross-section is formed on the fixed clamping block (4), and the length direction of the cross-section of the through hole (41) is the same as the sliding direction of the opposite movable clamping block (3). Limiting convex edges (42) are provided on the opposite two hole walls of the through hole (41). The locking bolt (6) passes through between the two limiting convex edges (42) and is screwed into the threaded hole, and the head of the locking bolt (6) presses against the two limiting convex edges (42).

5. The positioning component of the engraving and milling machine according to claim 2 or 3 or 4, characterized in that, A screw rod (43) is screwed at one end of the fixed clamping block (4) away from the movable clamping block (3). The axial direction of the screw rod (43) is the same as the moving direction of the opposite movable clamping block (3). A bearing (23) is installed on the turntable (2), and the outer end of the screw rod (43) is connected to the bearing (23).

6. The positioning component of the engraving and milling machine according to claim 1 or 2 or 3 or 4, characterized in that, The turntable (2) is a disc with a central hole (21). The moving directions of the above-mentioned movable clamping blocks (3) are arranged along the radial direction of the turntable (2). The two movable clamping blocks (3) and the two fixed clamping blocks (4) are distributed along the circumferential direction of the turntable (2).

7. The positioning component of the engraving and milling machine according to claim 6, characterized in that, And the piston rods of the two positioning cylinders (7) both extend towards the central hole (21) of the turntable (2). The two movable clamping blocks (3) are respectively fixed at the ends of the piston rods of the two positioning cylinders (7).

8. The positioning component of the engraving and milling machine according to claim 7, characterized in that, The positioning cylinder (7) is a double-rod positioning cylinder. The two piston rods of the double-rod positioning cylinder are arranged along the center line direction of the turntable (2). The above-mentioned movable clamping blocks (3) are fixed at the ends of the two piston rods of the double-rod positioning cylinder. The height of the fixed clamping block (4) along the center line direction of the turntable (2) is the same as the height of the cylinder body of the double-rod positioning cylinder along the center line direction of the turntable (2).

9. The positioning component of the engraving and milling machine according to claim 6, characterized in that, There are two of the turntables (2), and the two turntables (2) are parallel and fixed. One of the turntables (2) is rotatably connected to the mounting frame (1). The central holes (21) of the two turntables (2) are opposite to each other. On the disk surface of each turntable (2), there are two fixed clamping blocks (4), two movable clamping blocks (3), and a driving member for driving the movable clamping blocks (3) to move.

10. The positioning component of the engraving and milling machine according to claim 6, characterized in that, The turntable (2) is rotatably connected to the mounting frame (1) through a supporting slewing bearing. A gear ring (27) is circumferentially fixed on the outer ring of the supporting slewing bearing. A power motor (11) is fixed on the mounting frame (1), and a gear (111) is fixed on the motor shaft of the power motor (11). The gear (111) meshes with the gear ring (27).

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