CN110561155A - Positioning assembly of engraving and milling machine - Google Patents

Abstract

The invention provides a positioning assembly of a carving and milling machine, and belongs to the technical field of machining equipment. It has solved the lower problem of current carving mills the positioning accuracy of machine to timber. This carving mills locating component of machine, the carving mills the machine and includes frame and longmen, be equipped with the processing subassembly on the longmen, be equipped with processing platform in the frame, form three-dimensional translation between processing subassembly and the processing platform, locating component is including setting up the mounting bracket on processing platform, be connected with on the mounting bracket and can pivoted carousel, be equipped with two movable clamp splices that can remove on the carousel, still be equipped with on the carousel and drive the driving piece that moves the clamp splice and remove, the moving direction of two movable clamp splices is mutually perpendicular, still be fixed with two on the carousel and decide the clamp splice, two decide the clamp splice respectively with two movable clamp splice just right, and two move and enclose into the clamp opening between clamp splice and two fixed clamp splices. This carving mills locating component of machine can improve the positioning accuracy to timber.

Description

Positioning assembly of engraving and milling machine

Technical Field

The invention belongs to the technical field of machining equipment, and relates to a positioning assembly of an engraving and milling machine.

Background

As one kind of positioning assembly, a chuck is a common mechanical device used for clamping cylindrical workpieces in the mechanical field, and generally comprises a chuck body, movable clamping jaws and a clamping jaw driving mechanism, wherein the clamping jaw driving mechanism drives the movable clamping jaws uniformly distributed on the chuck body to move in the radial direction to clamp and position the workpieces, for example, the clamping chuck disclosed in the patent document (application number: 201821038076.3) comprises the chuck body, a clamping jaw driving assembly and a plurality of movable clamping jaws, the movable clamping jaws are uniformly distributed around a central axis, the sliding clamping jaws are arranged in a slide way in a sliding manner in the radial direction, the bottoms of the sliding clamping jaws are 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 clamping jaws to move synchronously, so that the. The movable clamping jaws are arranged into split type base jaws and replacement jaw blocks, and the reference is calibrated by replacing or adjusting the replacement jaw blocks, but obviously, frequent adjustment or replacement is complicated, and the precision of the reference is difficult to guarantee by artificial calibration.

Since the above-mentioned defects are mainly caused by excessive transmission components, such as assembly gaps and transmission wear, so that a person skilled in the art can easily think of reducing the transmission components, for example, patent document (201720206503.3) discloses a pneumatic flange fixture, which comprises a base, a placing plate arranged on the base, and a plurality of positioning mechanisms arranged on the circumference of the placing plate, wherein each positioning mechanism comprises a positioning and positioning cylinder, a chute and a top block arranged in the chute, the top block is connected with a piston of the positioning and positioning cylinder, and the top block is pushed by the positioning and positioning cylinder, so as to realize the positioning of a workpiece, but when the workpiece is positioned by the top block, especially when the workpiece is applied to a four-jaw chuck, the acting forces of the positioning and positioning cylinders are opposite to each other, and when the workpiece is clamped for a long time, the gas in the positioning and positioning cylinder has the possibility of leakage, and when the gas pressure of one positioning and positioning, the acting force of the opposite positioning cylinder is larger than that of the positioning cylinder, so that the positioning cylinder with larger acting force pushes the workpiece, the workpiece is shifted, and the positioning precision is influenced.

Disclosure of Invention

The invention aims to solve the problems in the prior art, and provides a positioning assembly of a carving and milling machine, which is used for solving the problems of low positioning precision and poor stability of the conventional positioning assembly.

The purpose of the invention can be realized by the following technical scheme: the positioning assembly of the engraving and milling machine comprises a rack and a gantry, wherein a processing assembly is arranged on the gantry, a processing platform is arranged on the rack, three-dimensional translation is formed between the processing assembly and the processing platform, the positioning assembly comprises a mounting frame arranged on the processing platform, a rotatable turntable is connected onto the mounting frame, two movable clamping blocks capable of moving are arranged on the turntable, a driving piece capable of driving the movable clamping blocks to move is further arranged on the turntable, the moving direction of the movable clamping blocks is perpendicular to the moving direction of the movable clamping blocks, and the positioning assembly is characterized in that two fixed clamping blocks are further fixed on the turntable, are respectively opposite to the two movable clamping blocks, and form a clamping opening between the two movable clamping blocks and the two fixed clamping blocks.

The positioning component positions a workpiece on the processing platform, the processing component and the processing platform realize three-dimensional translation, so that the processing component carries out three-dimensional processing on the workpiece, the moving directions of the two movable clamping blocks are vertical, the directions of the two fixed clamping blocks are also vertical, the fixed clamping blocks are fixed at proper positions in advance according to the size of the workpiece, the center of the workpiece is superposed with the rotating axis of the turntable when the workpiece is respectively abutted against the two fixed clamping blocks in two different directions, the workpiece is inserted into the clamping opening during positioning, then the two movable clamping blocks are driven to approach the respectively corresponding fixed clamping blocks through the driving piece until the two fixed clamping blocks respectively press the workpiece on the two fixed clamping blocks from two different directions, the positioning of the workpiece is realized, and the clamping component not only needs to play a role of clamping force application but also needs to play a role of positioning reference relative to a clamping jaw in the existing positioning component, the movable clamping block is fixed, and the movable clamping block only needs to move and compress tightly, namely the movable clamping block providing clamping acting force and the fixed clamping block used for the reference do not influence each other, so that the positioning accuracy is improved, meanwhile, the fixed clamping block is fixed, even if the driving force of the driving piece on the movable clamping block changes in the clamping process, the driving piece only influences the clamping force, but the workpiece cannot shift, and therefore the clamping stability is higher.

In the positioning assembly of the engraving and milling machine, the fixed clamping block is locked and fixed on the rotary table through the fastening piece, and the position of the fixed clamping block can be adjusted when the fastening piece is loosened. Under the locking action of the fastener, the fixed clamping block is in a fixed state in the continuous clamping and positioning process of the workpiece, the positioning stability of the workpiece is ensured, the fastener can be loosened before clamping and positioning, the position of the fixed clamping block is adjusted according to the size of the workpiece, and the workpiece is locked and fixed again through the fastener after being adjusted in place, so that the center of the workpiece is coincided with the rotating axis of the turntable when the workpiece is pressed against the fixed clamping block, the positioning precision is ensured, and the workpiece clamping device is suitable for workpieces with different sizes.

in the positioning assembly of the engraving and milling machine, two sliding grooves are formed in the side face of the rotary table, the length directions of the two sliding grooves are respectively the same as the sliding directions of the two movable clamping blocks, and the two fixed clamping blocks are respectively arranged in the two sliding grooves and are locked and fixed through respective fasteners. When the fastening piece is loosened, the fixed clamping block can slide along the sliding groove to adjust the position of the fixed clamping block in the moving direction of the movable clamping block, and after the fixed clamping block is adjusted in place, the fixed clamping block is locked and fixed again through the fastening piece, so that the reference position in the direction is determined, and the positioning accuracy of workpieces with different sizes is ensured.

In foretell carving mills positioning element of machine, the fastener includes locking bolt, has seted up the screw on the spout bottom surface, has seted up the transversal rectangular form through-hole that personally submits on deciding the clamp splice, and the length direction of through-hole cross section is unanimous with the relative slip direction who moves the clamp splice, all have spacing protruding edge on the relative two pore walls of through-hole, locking bolt passes and the spiro union is in the screw from between two spacing protruding edges, and locking bolt's head compresses tightly on two spacing protruding edges. When the locking bolt loosens, decide the clamp splice and can remove along the spout, locking bolt along the length direction of through-hole cross section with decide clamp splice relative movement promptly, locking bolt is locked in the adjustment back that targets in place, locking bolt compresses tightly on spacing protruding edge, thereby will decide the clamp splice and fix, certainly as another mode, also can be set up the through-hole on the carousel, set up the screw on deciding the clamp splice, the spiro union is in deciding the screw hole of clamp splice behind the through-hole of carousel is passed to locking bolt, also can realize fixing to deciding the clamp splice.

In the positioning assembly of the engraving and milling machine, a screw is screwed at one end of the fixed clamping block, which is far away from the movable clamping block, the axial direction of the screw is consistent with the moving direction of the opposite movable clamping block, a bearing is installed on the turntable, and the outer end of the screw is connected with the bearing. Through the connection of bearing, decide the clamp splice and can not break away from the carousel or shift relative carousel after loosening the fastener, can keep original position to can fix the adjustment of clamp splice position according to the dimensional change of work piece, and realize deciding the removal of clamp splice through rotating the screw rod, the stroke control accuracy of regulation is higher, improves positioning accuracy.

In the positioning assembly of the 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, and the two movable clamping blocks and the two fixed clamping blocks are distributed along the circumferential direction of the turntable. The work piece is the column, can pass the centre bore of pressing from both sides mouth and carousel, and moves the clamp splice and decide the circumference distribution of clamp splice to stability when guaranteeing the carousel rotation.

In the positioning assembly of the engraving and milling machine, the driving part comprises two positioning cylinders, the two positioning cylinders are fixed on the side face of the turntable, piston rods of the two positioning cylinders extend out of a central hole of the turntable, and the two movable clamping blocks are respectively fixed at the end parts of the piston rods of the two positioning cylinders. The movable clamping block is driven by the positioning cylinder, and the positioning cylinder can provide continuous clamping force after the movable clamping block clamps a workpiece, so that the stability of workpiece positioning is ensured.

in the positioning assembly of the engraving and milling machine, the turntable is further fixed with two gas tanks which are respectively communicated with the two positioning cylinders through pipelines, and the pipelines are respectively provided with electromagnetic valves capable of controlling the on-off of the pipelines. Because the carousel needs to rotate behind the tight work piece of location cylinder clamp through moving the clamp splice, therefore the location cylinder needs to break off with outside air supply, and the inside gas of location cylinder can appear leaking in long-time course of working, lead to the clamp force to descend, for this application sets up independent gas pitcher on the carousel, this gas pitcher can rotate along with the carousel, solenoid valve control pipeline intercommunication after the work piece location is good, the gas pitcher can provide gas for the location cylinder, thereby maintain the inside atmospheric pressure of location cylinder in the course of working, and then guarantee the clamp force stable to the work piece, improve positioning stability.

In foretell carving mills positioning assembly of machine, the driving piece includes two driving motor, be fixed with two mount pads on the carousel, all slide in the mount pad and wear to be equipped with the telescopic link, the one end of these two telescopic links all stretches out to the centre bore of carousel, and the clamp splice is fixed respectively at the tip of two telescopic links to the two above-mentioned moving, the screw has been seted up to the other end of telescopic link, still rotates the lead screw that is connected with one end spiro union in the screw of telescopic link on the mount pad, and the other end of two lead screws passes through belt pulley transmission cooperation with two driving motor respectively. The driving motor drives the screw rod to rotate through belt pulley transmission, the screw rod drives the telescopic rod to stretch out and draw back, so that clamping and releasing of the workpiece are achieved, self-locking of the screw rod and the telescopic rod is achieved through threaded fit when the workpiece is clamped, and continuous clamping and positioning of the workpiece are achieved.

in the positioning assembly of the engraving and milling machine, the positioning cylinder is a double-rod positioning cylinder, two piston rods of the double-rod positioning cylinder are arranged along the central line direction of the turntable, the movable clamping block is fixed at the end parts of the two piston rods of the double-rod positioning cylinder, and the height of the fixed clamping block along the central line direction of the turntable is consistent with the height of a cylinder body of the double-rod positioning cylinder along the central line direction of the turntable. Two piston rods of the double-rod positioning cylinder are arranged along the central line direction of the rotary table, so that the movable clamping block has a larger size in the central line direction of the rotary table, and after a workpiece passes through a central hole of the rotary table, the movable clamping block and the fixed clamping block can have a larger clamping area with the workpiece, and the positioning stability is improved.

In the positioning assembly of the engraving and milling machine, the number of the turntables is two, the two turntables are parallel and fixed, one of the turntables is rotatably connected with the mounting frame, the central holes of the two turntables are opposite, and the surface of each turntable is provided with two fixed clamping blocks, two movable clamping blocks and a driving piece for driving the movable clamping blocks to move. In addition, the structural design can increase the clamping area of the workpiece and improve the positioning stability.

In the positioning assembly of the engraving and milling machine, the turntable is rotatably connected to the mounting frame through the support rotary bearing, the gear ring is circumferentially fixed on the outer ring of the support rotary bearing, the power motor is fixed on the mounting frame, the gear is fixed on the motor shaft of the power motor, and the gear is meshed with the gear ring. The power motor drives the turntable to rotate through the matching of the gear and the gear ring, and the structure is compact and stable.

Compared with the prior art, this carving mills locating component of machine has following advantage:

1. Because the fixed clamping blocks are fixed in advance and play a role in backing a mountain, a workpiece can be positioned by taking the fixed clamping blocks in two different directions as references, and the movable clamping block only needs to be moved and pressed, namely the movable clamping block providing clamping acting force and the fixed clamping block used for the references do not influence each other, so that the positioning accuracy is improved.

2. Because the fixed clamping block is fixed, even if the driving force of the driving piece on the movable clamping block changes in the clamping process, the clamping force is only influenced, but the workpiece cannot shift, so that the clamping stability is higher.

3. The fixed clamping block is fixed on the rotary table through the locking bolt, so that the fastening piece can be loosened before clamping and positioning, the position of the fixed clamping block is adjusted according to the size of a workpiece, and the fixed clamping block is locked and fixed again through the fastening piece after being adjusted in place, so that the center of the workpiece is superposed with the rotating axis of the rotary table when the workpiece is pressed against the fixed clamping block, the positioning precision is ensured, and the rotary table is suitable for workpieces with different sizes.

Drawings

Fig. 1 is a schematic perspective view of an engraving and milling machine.

Fig. 2 is a perspective view of the positioning assembly.

Fig. 3 is a structural elevation view of the positioning assembly.

3 fig. 3 4 3 is 3 a 3 sectional 3 view 3 of 3 the 3 structure 3 at 3 a 3- 3 a 3 in 3 fig. 3 3 3. 3

Fig. 5 is a schematic perspective view of a positioning assembly according to a second embodiment.

Fig. 6 is a schematic perspective view of a positioning assembly according to a third embodiment.

fig. 7 is a schematic perspective view of a positioning assembly according to a fourth embodiment.

Fig. 8 is a schematic perspective view of a positioning assembly according to a fifth embodiment.

FIG. 9 is a perspective view of another perspective of the positioning assembly according to the fifth embodiment.

In the figure, 1, a mounting frame; 11. a power motor; 111. a gear; 2. a turntable; 21. a central bore; 22. a chute; 23. a bearing; 24. a mounting seat; 25. a telescopic rod; 26. a screw rod; 27. a ring gear; 28. an electrical connection post; 29. a seal ring; 20. a thrust cylinder; 3. a movable clamping block; 4. fixing the clamping block; 41. a through hole; 42. a limiting convex edge; 43. a screw; 5. clamping the opening; 6. locking the bolt; 7. positioning the air cylinder; 8. a drive motor; 9. a gas tank; 91. an electromagnetic valve; 92. a pipeline; 93. a check valve; 101. a frame; 102. a gantry; 103. a vertical planker; 104. a support; 105. a tool holder; 106. processing the assembly; 107. a longitudinal towing bracket; 108. and (7) processing the platform.

Detailed Description

The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.

The first embodiment is as follows:

As shown in fig. 1, the positioning component of the engraving and milling machine, the engraving machine comprises a frame 101 and a gantry 102 fixed on the frame, vertical plankers 103 are connected on two vertical columns of the gantry 102 in a sliding manner along the vertical direction, brackets 104 are fixed on the two vertical plankers 103, a strip-shaped tool holder 105 is rotatably connected between the two brackets 104, the cutter frame 105 is arranged along the transverse direction, the processing assemblies 106 are provided with a plurality of groups, each group of processing assemblies 106 comprises a processing motor and a cutter head, the processing motor is fixed on the cutter frame 105, the cutter head is arranged on the processing motor, the processing motor can be a double-rod motor, the cutter head can be rotated or changed by rotating the cutter frame 105, a longitudinal towing bracket 107 is connected to the rack 101 in a longitudinal sliding mode, a machining platform 108 is connected to the longitudinal towing bracket 107 in a transverse sliding mode, and the vertical towing plate 103, the longitudinal towing bracket 107 and the machining platform 108 are all driven by a servo motor and a screw nut assembly. Certainly, in the actual design process, the machining platform 108 may be fixed on the rack 101, the gantry 102 is longitudinally slidably connected to the rack 101 along the rack 101, meanwhile, the vertical carriage 103 is transversely slidably connected to the transverse carriage, and the tool holder 105 is connected to the transverse carriage, so that three-dimensional translation between the machining assembly 106 and the machining platform 108 can also be realized; or the machining platform 108 can be connected to the frame 101 in a sliding manner along the longitudinal direction, the gantry 102 is fixedly arranged, meanwhile, the vertical carriage 103 is connected to the transverse carriage in a sliding manner along the transverse direction, and the tool rest 105 is connected to the transverse carriage, so that three-dimensional translation between the machining assembly 106 and the machining platform 108 can also be realized.

Referring to fig. 2, fig. 3 and fig. 4, the positioning assembly includes a plate-shaped mounting frame 1 and a disk-shaped turntable 2, the mounting frame 1 is fixed on the processing platform, a center hole 21 is formed in the center of the turntable 2, the turntable 2 is rotatably connected to one side of the mounting frame 1 by supporting a rotary bearing, the turntable 2 is parallel to the mounting frame 1, a gear ring 27 is sleeved on an outer ring of the supporting rotary bearing, a power motor 11 is fixed to the other side of the mounting frame 1, a motor shaft of the power motor 11 penetrates through the mounting frame 1, a gear 111 is fixed to the end of the motor shaft, and the gear 111 is meshed 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 double-rod positioning cylinders, the planes of two piston rods of the positioning cylinders 7 are parallel to the side surface of the turntable 2, the piston rods of the two positioning cylinders 7 extend out towards the central hole 21, the end parts of the piston rods of the two positioning cylinders 7 are fixed with movable clamping blocks 3, the two movable clamping blocks 3 can be driven to move along the radial direction of the turntable 2 by the extension and retraction of the piston rod of the positioning cylinder 7, the moving directions of the two movable clamping blocks 3 are vertical, two fixed clamping blocks 4 are fixed on the side surface of the turntable 2, the two fixed clamping blocks 4 are both strip-shaped, one end of each fixed clamping block 4 extends out of the central hole 21 along the radial direction of the turntable 2, the end surfaces of one ends of the two fixed clamping blocks 4 extending into the central hole 21 are respectively opposite to the end surfaces of the two movable clamping blocks 3, namely, the two movable clamping blocks 3 and the two fixed clamping blocks 4 are distributed along the circumferential direction of the turntable 2, and a clamping opening 5 is enclosed between the two movable clamping blocks 3 and the two fixed clamping blocks 4.

The fixed clamping block 4 is fixed on the rotary table 2 through a locking bolt 6, specifically, two sliding grooves 22 arranged along the radial direction are arranged on the side surface of the rotary table 2, the length direction of the two sliding grooves 22 is respectively the same as the sliding direction of the two movable clamping blocks 3, a screw hole is arranged on the bottom surface of the sliding groove 22, a through hole 41 with a long strip-shaped cross section is arranged on the fixed clamping block 4, the length direction of the cross section of the through hole 41 is consistent with the sliding direction of the opposite movable clamping block 3, two opposite hole walls of the through hole 41 are respectively provided with a limiting convex edge 42, the fixed clamping block 4 is propped against the sliding groove 22, namely, the bottom surface of the fixed clamping block 4 is jointed on the bottom surface of the sliding groove 22, two side surfaces of the fixed clamping block 4 are jointed with two groove walls of the sliding groove 22, the locking bolt 6 passes through between the two limiting convex edges 42 and is screwed in the screw hole, the head of the locking bolt 6 is tightly pressed on the two limiting convex, the position is adjusted, and the fixed clamping block 4 can be fixed on the rotary table 2 when the locking bolt 6 is locked. The end of the fixed clamping block 4 far away from the movable clamping block 3 is in threaded connection with a screw 43, the axial direction of the screw 43 is consistent with the moving direction of the movable clamping block 3, the bearing 23 is installed on the turntable 2, the outer end of the screw 43 is connected with the bearing 23, and when the locking bolt 6 is loosened, the fixed clamping block 4 can be moved by rotating the screw 43.

Example two:

The positioning assembly is substantially the same as the first embodiment, and is different from the first embodiment in that, as shown in fig. 5, two driving motors 8 and two mounting seats 24 are fixed on a turntable 2, telescopic rods 25 are slidably inserted into the mounting seats 24, the two telescopic rods 25 are radially arranged along the turntable 2, the two telescopic rods 25 are perpendicular to each other, one ends of the two telescopic rods 25 extend out of a central hole 21 of the turntable 2, two movable clamping blocks 3 are respectively fixed at the ends of the two telescopic rods 25, screw holes are formed at the other ends of the telescopic rods 25, a screw rod 26 is rotatably connected to the mounting seats 24, one ends of the two screw rods 26 are respectively screwed into the screw holes of the two telescopic rods 25, the other ends of the two screw rods 26 are respectively in transmission fit with the two driving motors 8 through belt pulleys, an electric connecting column 28 is further fixed on the turntable 2, the electric connecting column 28 is electrically connected with the driving motors 8, when the turntable 2 rotates to a, thereby supplying power to the drive motor 8.

Example three:

The positioning assembly is basically the same as the first embodiment, and the difference is that as shown in fig. 6, two piston rods of a positioning cylinder 7 are arranged along the central line direction of a turntable 2, a movable clamping block 3 is fixed at the end parts of the two piston rods of a double-rod positioning cylinder, the movable clamping block 3 is long-strip-shaped, the length direction of the movable clamping block 3 is arranged along the central line direction of the turntable 2, and the height of a fixed clamping block 4 along the central line direction of the turntable 2 is consistent with the height of a cylinder body of the double-rod positioning cylinder along the central line direction of the turntable 2.

Example four:

The positioning assembly is basically the same as the first embodiment, but different from the first embodiment, as shown in fig. 7, there are two rotating discs 2, the two rotating discs 2 are parallel and fixed, one of the rotating discs 2 is rotatably connected to the mounting frame 1, the central holes 21 of the two rotating discs 2 are opposite, and two fixed clamping blocks 4, two movable clamping blocks 3 and a driving member for driving the movable clamping blocks 3 to move are disposed on the disc surface of each rotating disc 2.

example five:

The positioning assembly is basically the same as the first embodiment, and is different from the first embodiment in that, as shown in fig. 8 and 9, two gas tanks 9 are further fixed on the turntable 2, the two gas tanks 9 are respectively communicated with the two positioning cylinders 7 through pipelines 92, the gas tanks 9 can be connected with an external gas source through the pipelines 92, check valves 93 are connected on the pipelines 92 of the gas tanks 9 for connecting with the external gas source, electromagnetic valves 91 capable of controlling the on-off of the pipelines are arranged on the pipelines 92 of the gas tanks 9 connected with the positioning cylinders 7, mounting holes are arranged on the turntable 2, the end parts of the pipelines 92 for connecting with the gas source are inserted in the mounting holes, sealing rings 29 are further fixed at the orifices of the mounting holes, thrust cylinders 20 are fixed on the mounting frame 1, piston rods of the thrust cylinders 20 penetrate through the mounting frame 1 and are opposite to the turntable 2, and the turntable 2 can rotate until the mounting holes are opposite to, thrust cylinder 20's piston rod is the tubulose, and the trachea of air supply is continuous with the piston rod rear end, and it is relative with carousel 2 rotation to thrust cylinder 20's piston rod and mounting hole when needing the location, and the piston rod stretches out and supports and form sealedly on leaning on sealing washer 29, then the air supply aerifys gas pitcher 9, and gas pitcher 9 can rotate along with carousel 2 when rotating, and solenoid valve 91 control line 92 intercommunication after the work piece location is good, and gas pitcher 9 can provide gas for positioning cylinder 7 to maintain positioning cylinder 7 the inside atmospheric pressure in the course of working.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.

Although the terms mounting 1, power motor 11, gear 111, etc. are used more herein, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed as being without limitation to any additional limitations that may be imposed by the spirit of the present invention.

Claims (12)

1. The positioning assembly of the engraving and milling machine comprises a rack (101) and a gantry (102), wherein a processing assembly (106) is arranged on the gantry (102), a processing platform (108) is arranged on the rack (101), three-dimensional translation is formed between the processing assembly (106) and the processing platform (108), the positioning assembly comprises an installation frame (1) arranged on the processing platform (108), the installation frame (1) is connected with a rotatable turntable (2), the turntable (2) is provided with two movable clamping blocks (3) capable of moving, the turntable (2) is further provided with a driving part capable of driving the movable clamping blocks (3) to move, the moving directions of the two movable clamping blocks (3) are vertical to each other, the positioning assembly is characterized in that the turntable (2) is further fixedly provided with two fixed clamping blocks (4), and the two fixed clamping blocks (4) are respectively opposite to the two movable clamping blocks (3), and a clamping opening (5) is enclosed between the two movable clamping blocks (3) and the two fixed clamping blocks (4).

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

3. the engraving and milling machine positioning assembly according to claim 2, wherein the side surface of the rotary table (2) is provided with two sliding grooves (22), the length directions of the two sliding grooves (22) are respectively the same as the sliding directions of the two movable clamping blocks (3), and the two fixed clamping blocks (4) are respectively arranged in the two sliding grooves (22) and are locked and fixed through respective fasteners.

4. The engraving and milling machine positioning assembly according to claim 3, wherein the fastening member comprises a locking bolt (6), a screw hole is formed in the bottom surface of the sliding groove (22), a through hole (41) with an elongated cross section is formed in the fixed clamping block (4), the length direction of the cross section of the through hole (41) is consistent with the sliding direction of the opposite movable clamping block (3), two opposite hole walls of the through hole (41) are respectively provided with a limiting convex edge (42), the locking bolt (6) penetrates between the two limiting convex edges (42) and is in threaded connection with the screw hole, and the head of the locking bolt (6) is pressed against the two limiting convex edges (42).

5. The engraving and milling machine positioning assembly according to claim 2, 3 or 4, characterized in that a screw rod (43) is screwed at one end of the fixed clamping block (4) far away from the movable clamping block (3), the axial direction of the screw rod (43) is consistent with the moving direction of the opposite movable clamping block (3), a bearing (23) is installed on the rotary table (2), and the outer end of the screw rod (43) is connected with the bearing (23).

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

7. The engraving and milling machine positioning assembly according to claim 6, wherein the driving member comprises two positioning cylinders (7), the two positioning cylinders (7) are fixed on the side surface of the turntable (2), piston rods of the two positioning cylinders (7) extend out of a central hole (21) of the turntable (2), and the two movable clamping blocks (3) are respectively fixed at the end parts of the piston rods of the two positioning cylinders (7).

8. The engraving and milling machine positioning assembly according to claim 7, characterized in that two air tanks (9) are further fixed on the turntable (2), the two air tanks (9) are respectively communicated with the two positioning air cylinders (7) through pipelines (92), and electromagnetic valves (91) capable of controlling the pipelines (92) to be switched on and off are respectively arranged on the pipelines (92).

9. The engraving and milling machine positioning assembly according to claim 6, wherein the driving member comprises two driving motors (8), two mounting seats (24) are fixed on the turntable (2), telescopic rods (25) are slidably arranged in the mounting seats (24), one ends of the two telescopic rods (25) extend out of a central hole (21) of the turntable (2), the two movable clamping blocks (3) are respectively fixed at the ends of the two telescopic rods (25), a screw hole is formed in the other end of each telescopic rod (25), a screw rod (26) with one end screwed in the screw hole of each telescopic rod (25) is rotatably connected to the mounting seat (24), and the other ends of the two screw rods (26) are respectively in transmission fit with the two driving motors (8) through belt pulleys.

10. The engraving and milling machine positioning assembly according to claim 7, wherein the positioning cylinder (7) is a double-rod positioning cylinder, two piston rods of the double-rod positioning cylinder are arranged along the central line direction of the turntable (2), the movable clamping block (3) is fixed at the end parts of the two piston rods of the double-rod positioning cylinder, and the height of the fixed clamping block (4) along the central line direction of the turntable (2) is consistent with the height of a cylinder body of the double-rod positioning cylinder along the central line direction of the turntable (2).

11. The engraving and milling machine positioning assembly according to claim 6, characterized in that the number of the rotary tables (2) is two, the two rotary tables (2) are parallel and fixed, one rotary table (2) is rotatably connected with the mounting frame (1), the central holes (21) of the two rotary tables (2) are opposite, and two fixed clamping blocks (4), two movable clamping blocks (3) and a driving member for driving the movable clamping blocks (3) to move are arranged on the surface of each rotary table (2).

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