CN115070464B - Novel high-efficient cnc engraving and milling machine - Google Patents

Abstract

The application relates to a novel efficient engraving and milling machine, which comprises a machine tool main body, wherein the machine tool main body is provided with a workbench for placing a workpiece to be processed; the workbench is provided with a sliding groove along the length direction of the workbench, and the workbench is provided with a sliding groove along the width direction of the workbench; the inner side wall of the sliding groove and the inner side wall of the sliding groove are connected with two clamping plates in a sliding way, wherein the clamping plates are used for clamping a workpiece to be processed; connecting components are connected between the two clamping plates positioned in the sliding groove and between the two clamping plates positioned in the sliding groove, and the connecting components are used for driving the corresponding two clamping plates to synchronously approach each other or synchronously separate from each other; a fixing piece for fixing the clamping plate is arranged between the clamping plate and the workbench. All the clamping plates are matched with each other, so that the workpieces can be automatically centered, the centers of the corresponding workpieces and the center of the workpiece processed last time are automatically aligned, the operation of resetting X, Y coordinates of the origin of a workpiece coordinate system is reduced, and the debugging efficiency of a machine tool is improved.

Description

Novel high-efficient cnc engraving and milling machine

Technical Field

The application relates to the technical field of cutting processing equipment, in particular to a novel efficient engraving and milling machine.

Background

As a numerical control cutting machining device, the engraving and milling machine has the characteristics of high machining precision and wide application range.

Referring to fig. 1, the engraving and milling machine comprises a machine tool body 1, wherein the machine tool body 1 is provided with a main shaft 11 and a workbench 2; the axial direction of the main shaft 11 is arranged in the up-down direction; the main shaft 11 can move up and down, and the main shaft 11 can rotate around the axis of the main shaft; the table 2 is located below the spindle 11, and the table 2 is movable in the longitudinal direction and the width direction of the machine tool body 1. When a cnc engraving machine is used for processing a workpiece, a cutter is arranged at the lower end of the main shaft 11, and the workpiece to be processed is clamped on the workbench 2; then, the table 2 is manually slowly manipulated to move the center of the workpiece to a position directly below the spindle 11; at this time, the coordinates displayed by the engraving and milling machine are X, Y coordinates which are set as the origin of the workpiece coordinate system; setting the Z coordinate of the origin of the workpiece coordinate system according to the thickness of the workpiece; and finally, starting the engraving and milling machine so that the engraving and milling machine processes the workpiece according to a preset program.

For the above related art, the inventor believes that when the origin coordinates of the workpiece coordinate system are set, the workbench needs to be manually controlled slowly, and the operation is complicated, so that the debugging efficiency of the engraving and milling machine is low, which needs to be improved.

Disclosure of Invention

The application aims to provide a novel efficient engraving and milling machine so as to solve the problem of low debugging efficiency of the engraving and milling machine.

The application provides a novel efficient engraving and milling machine which adopts the following technical scheme:

the novel efficient engraving and milling machine comprises a machine tool main body, wherein the machine tool main body is provided with a workbench for placing a workpiece to be processed; the workbench is provided with a sliding groove along the length direction of the workbench, and the workbench is provided with a sliding groove along the width direction of the workbench; the inner side wall of the sliding groove and the inner side wall of the sliding groove are connected with two clamping plates in a sliding manner, wherein the clamping plates are used for clamping a workpiece to be processed; the connecting components are connected between the two clamping plates positioned in the sliding groove and used for driving the corresponding two clamping plates to synchronously approach each other or synchronously separate from each other; a fixing piece for fixing the clamping plate is arranged between the clamping plate and the workbench.

By adopting the technical scheme, after the workpiece to be processed is placed on the workbench, the clamping plate is slid so that the clamping plate is abutted with the side wall of the workpiece; the two clamping plates in the sliding groove synchronously approach to the workpiece so that the workpiece moves to the center position between the two corresponding clamping plates along the length direction of the workbench; the two clamping plates in the sliding groove synchronously approach the workpiece, so that the workpiece moves to the center position between the two corresponding clamping plates along the width direction of the workbench, and the center of the workpiece coincides with the center of the area surrounded by the four clamping plates. When workpieces with different sizes are processed, all clamping plates are matched with each other, so that the workpieces can be automatically centered, the center of the corresponding workpiece is automatically aligned with the center of the workpiece processed last time, a machine tool is not required to be debugged again, the X, Y coordinate of the origin of the workpiece coordinate system is not required to be reset, and only the Z coordinate of the origin of the workpiece coordinate system is required to be adjusted according to the thickness of the workpiece; the operation of resetting the X, Y coordinates of the origin of the workpiece coordinate system is reduced, the operation is simpler and more labor-saving, and the debugging time of the machine tool is shortened, so that the debugging efficiency of the machine tool is improved, and the machining efficiency of the machine tool is improved. After the clamping plate clamps the workpiece, the fixing piece is used for fixing the clamping plate, so that the workpiece to be processed can be fixed, and the workpiece clamping device is simple in structure and convenient to operate.

Optionally, the connecting assembly comprises a connecting gear rotationally connected with the workbench and connecting racks positioned on two sides of the connecting gear; the connecting racks are in one-to-one correspondence with the clamping plates, and each connecting rack is fixedly connected with the clamping plate; and the two connecting racks are meshed with the connecting gear.

Through adopting above-mentioned technical scheme, when one of them grip block removes, the grip block can drive the connection rack that corresponds and remove to drive the connection gear and rotate, thereby can drive another connection rack and grip block and remove, thereby realize that two grip blocks are synchronous to be close to each other or are kept away from each other in step.

Optionally, the two connecting gears are connected with a rotating shaft, and the rotating shaft is rotationally connected with the workbench; the rotating shaft is connected with a fixed sleeve in a sliding manner along the axial direction of the rotating shaft, and the peripheral wall of the fixed sleeve is in threaded connection with the workbench.

By adopting the technical scheme, the connecting gear can be driven to rotate by rotating the rotating shaft so as to drive the corresponding two clamping plates to be close to or far away from each other; the fixed sleeve is in threaded fit with the workbench, so that the contact area between the rotating shaft and the workbench can be increased, and the friction between the rotating shaft and the workbench can be increased; when the clamping plate is contacted with a workpiece to be processed, the rotation shaft stops rotating, and the rotation shaft can keep static through friction force between the rotation shaft and the workbench, so that the possibility that the clamping plate is separated from the workpiece is reduced, and the clamping plate is conveniently locked by the fixing piece, so that the workpiece is clamped by the clamping plate.

Optionally, the workbench is rotationally connected with a driving shaft, the driving shaft is connected with two transmission shafts, and the two transmission shafts are rotationally connected with the workbench; the driving shaft can drive the two transmission shafts to synchronously rotate; the transmission shafts are in one-to-one correspondence with the rotating shafts, and a transmission assembly is connected between each transmission shaft and the corresponding rotating shaft; when the rotation shaft is blocked and stops rotating, the transmission shaft can continue rotating.

By adopting the technical scheme, when the workpiece is clamped, the driving shafts can be directly rotated to drive the two transmission shafts to rotate, so that the two rotation shafts are driven to rotate to drive all the clamping plates to move towards the workpiece; when one of the clamping plates is abutted against the workpiece, the corresponding rotating shaft stops rotating; at this moment, the drive shaft continues to rotate to drive another axis of rotation and rotate, until all grip blocks all with work piece butt can, the operation is simpler, convenient.

Optionally, the transmission assembly comprises a fixed plate fixedly connected with the rotating shaft and a sliding plate slidingly connected with the transmission shaft along the axial direction of the transmission shaft; the sliding plate is provided with a transmission bulge extending towards the direction of the fixed plate, and the fixed plate is provided with a fixed groove which is in plug-in fit with the transmission bulge; the transmission bulge is obliquely provided with guide surfaces along two sides of the circumferential direction of the transmission shaft; an elastic connecting piece for driving the sliding plate to move towards the direction of the fixed plate is connected between the sliding plate and the transmission shaft.

Through adopting above-mentioned technical scheme, when the axis of rotation is blocked and stop rotating the back, drive shaft continues the application of force to the inside wall of fixed slot when the drive shaft, the protruding effort that produces of transmission, the inside wall of fixed slot has reverse effort to the direction face to the drive sliding plate moves to the direction of keeping away from the fixed plate, in order to make the protruding and fixed slot of transmission break away from, for the transmission shaft continues to rotate.

Optionally, the two connecting gears are sequentially arranged along the up-down direction; the connecting gear positioned above is coaxially connected with an upper fixed shaft, the connecting gear positioned below is coaxially connected with a lower fixed shaft, and the lower fixed shaft is rotationally connected with the workbench; the upper end wall of the lower fixed shaft is downwards penetrated and provided with a rotating hole, the upper fixed shaft is inserted into the rotating hole, and the upper fixed shaft is rotationally connected with the inner side wall of the rotating hole.

Through adopting above-mentioned technical scheme, two connecting gear sets gradually along upper and lower direction, is favorable to making two sets of grip blocks all centre gripping in the central point that corresponds of work piece to be favorable to improving the homogeneity of the atress of each side of work piece, be favorable to increasing the size scope of waiting to process the work piece simultaneously, improve the suitability.

Optionally, the clamping plate is slidingly connected with an abutting block for abutting against the side wall of the workpiece to be processed along the sliding direction of the clamping plate; the clamping plate is connected with a connecting block in a sliding manner along the up-down direction, and the connecting block is provided with a plug hole for inserting one end of the abutting block; the connecting block is provided with a limiting block which is used for being abutted with the upper surface of a workpiece to be processed; the abutting block is obliquely provided with a driving surface for abutting against the inner side wall of the lower side of the plug hole; the abutting block is connected with an elastic abutting piece for driving the abutting block to move in a direction away from the plug hole.

Through adopting above-mentioned technical scheme, the grip block is to the in-process that the work piece is close to, and the butt piece is at first with the lateral wall butt of work piece to make the inside wall of the downside of driving surface butt push away the spliced eye, with the drive connecting block downwardly moving, thereby drive the stopper downwardly moving with the upper surface of support tight work piece. When the clamping plate moves in the direction away from the workpiece, the abutting block is separated from the inserting hole, so that the interaction force between the limiting block and the workpiece is reduced, and the limiting block and the workpiece are separated from each other, so that the clamping plate can move conveniently.

Optionally, the inside wall of spliced eye is provided with the laminating face that is used for laminating with the driving surface.

Through adopting above-mentioned technical scheme, the laminating face mutually supports with the driving surface, can increase the area of contact between butt piece and the connecting block, reduces the interact power between butt piece and the connecting block to be convenient for relative movement between butt piece and the connecting block, in order to butt piece drive connecting block removal.

Optionally, be provided with the elasticity that is used for driving the connecting block to upwards remove between connecting block and the grip block and support the pushing away the piece.

By adopting the technical scheme, after the abutting block is separated from the inserting hole, the elastic abutting piece moves on the workpiece.

Optionally, the connecting block is slidingly connected with a butt joint rod along the up-down direction, and the connecting block is provided with a locking piece for fixing the butt joint rod; the limiting block is fixedly connected with the butt joint rod.

Through adopting above-mentioned technical scheme, the butt joint pole can be adjusted from top to bottom for the connecting block to adjust the distance between stopper and the upper surface of workstation, in order to be suitable for the clamping to the work piece of different thickness.

In summary, the present application includes at least one of the following beneficial technical effects:

1. when workpieces with different sizes are processed, all the clamping plates are matched with each other, so that the workpieces can be automatically centered, the center of the corresponding workpiece is automatically aligned with the center of the workpiece processed last time, X, Y coordinates of the origin of a workpiece coordinate system are not required to be reset, the operation is simpler and more labor-saving, and the debugging efficiency of a machine tool is improved;

2. the driving shaft, the transmission shaft and the transmission assembly are mutually matched to drive all the clamping plates to move, so that the structure is simple, and the operation is convenient;

3. in the process that the clamping plate approaches to the workpiece, the abutting block is firstly abutted with the side wall of the workpiece, so that the driving surface abuts against the inner side wall of the lower side of the plug hole to drive the connecting block to move downwards, and the limiting block is driven to move downwards to abut against the upper surface of the workpiece, so that the workpiece is further fixed.

Drawings

Fig. 1 is a schematic view of the overall structure of a cnc engraving and milling machine according to the related art.

Fig. 2 is a schematic diagram of the overall structure of a novel efficient engraving and milling machine according to an embodiment of the present application.

Fig. 3 is a schematic view for showing the structure of the work bench.

Fig. 4 is an enlarged view of a portion a in fig. 3.

Fig. 5 is a schematic cross-sectional view taken along line B-B in fig. 4.

Fig. 6 is a schematic cross-sectional view taken along line C-C in fig. 3.

Fig. 7 is an exploded view for showing a connection structure between the clamping plate and the table.

Fig. 8 is an enlarged view of a portion D in fig. 6.

Fig. 9 is an exploded schematic view for showing the structure of the transmission assembly.

In the figure, 1, a machine tool main body; 11. a main shaft; 2. a work table; 21. a slip groove; 22. a sliding groove; 23. a receiving groove; 24. a receiving groove; 241. a mounting groove; 2411. a mounting plate; 25. a relief groove; 26. a mounting block; 261. a transmission screw hole; 27. a drive shaft; 28. a transmission shaft; 281. a limiting ring; 282. an elastic connection member; 3. a clamping plate; 31. a fixed block; 311. a fixing member; 312. a threaded hole; 32. a limit bar; 321. a limit groove; 33. a connecting block; 331. a plug hole; 3311. a bonding surface; 332. a guide hole; 34. a receiving plate; 341. an elastic pushing piece; 35. a slip hole; 351. an abutment block; 3511. a driving surface; 3512. an extension block; 352. an extension groove; 3521. an elastic abutment; 36. a locking member; 4. a limiting block; 41. a butt joint rod; 5. a connection assembly; 51. a connecting gear; 511. an upper fixed shaft; 512. a lower fixed shaft; 5121. a rotation hole; 52. the connecting rack; 6. a drive turbine; 61. a drive worm; 611. a rotating shaft; 6111. a transmission key; 612. a fixed sleeve; 6121. a transmission groove; 7. a transmission assembly; 71. a fixing plate; 711. a fixing groove; 72. a sliding plate; 721. a transmission protrusion; 7211. a guide surface.

Detailed Description

The present application will be described in further detail with reference to fig. 2 to 9.

Referring to fig. 2, the novel efficient engraving and milling machine comprises a machine tool body 1, wherein the machine tool body 1 is provided with a main shaft 11 and a workbench 2. The workbench 2 is used for clamping a workpiece to be processed; the spindle 11 is used for mounting a tool for machining a workpiece to be machined.

Referring to fig. 3, a sliding groove 21 is formed in the upper surface of the table 2 along the longitudinal direction of the table 2 itself; in this embodiment, each end of the sliding groove 21 is communicated with the end wall of the corresponding end of the working table 2, and a filling block is integrally formed at the middle position of the working table 2 in the length direction of the sliding groove 21, and divides the sliding groove 21 into two sections. The upper surface of the workbench 2 is provided with a sliding groove 22 along the width direction of the workbench 2; in this embodiment, each end of the sliding groove 22 is communicated with a side wall of a corresponding side of the table 2, and the middle position of the table 2 in the sliding groove 22 is integrally formed and filled with filling blocks, and the filling blocks divide the sliding groove 22 into two sections.

Referring to fig. 3, the slide groove 21 is located at a center position of the table 2 in the width direction thereof, and the slide groove 22 is located at a center position of the table 2 in the length direction thereof. The inner side walls of each section of sliding groove 21 and each section of sliding groove 22 are slidably connected with a clamping plate 3; when clamping a workpiece, placing the workpiece to be processed in an area surrounded by four clamping plates 3; the two clamping plates 3 located in the sliding groove 21 can clamp both ends of the workpiece in the length direction of the workpiece itself, and the two clamping plates 3 located in the sliding groove 22 can clamp both sides of the workpiece in the width direction of the workpiece itself to clamp the workpiece to be processed. In another embodiment, two sliding grooves 21 are communicated with each other in a penetrating way, and two sliding grooves 22 are communicated with each other in a penetrating way.

Referring to fig. 3 and 4, a fixing block 31 is welded and fixed to a side wall of each clamping plate 3 in a direction away from the opposite other clamping plate 3, and the fixing block 31 is provided with a fixing piece 311. In this embodiment, the fixing member 311 includes a screw; the upper surface of the fixed block 31 is provided with a threaded hole 312 in a downward penetrating manner, and the fixing piece 311 is in threaded connection with the inner side wall of the threaded hole 312. When the clamping plate 3 moves to be abutted against the workpiece, the fixing piece 311 is rotated, so that the lower end of the fixing piece 311 is abutted against the upper surface of the workbench 2 to fix the clamping plate 3, and thus the workpiece to be processed is fixed.

Referring to fig. 4, the clamping plate 3 is welded and fixed with a limit bar 32, and the limit bar 32 and the fixing block 31 are located at the same side of the clamping plate 3. The side walls of the two limit strips 32 facing each other are provided with limit grooves 321 along the up-down direction, and the inner side walls of the two limit grooves 321 are connected with a connecting block 33 in a sliding manner. A receiving plate 34 is welded and fixed at a position of the clamping plate 3 below the connecting block 33, and an elastic pushing piece 341 is arranged on the upper surface of the receiving plate 34. In this embodiment, the elastic pushing member 341 includes a rubber pad, the lower surface of the rubber pad is adhered and fixed to the upper surface of the receiving plate 34, and the upper surface of the rubber pad abuts against the lower end wall of the connecting block 33 to support the connecting block 33. In another embodiment, the elastic pushing member 341 may also be a spring.

Referring to fig. 4 and 5, a sliding hole 35 is formed in the side wall of the side of the clamping plate 3 facing away from the fixed block 31 in a penetrating manner along the sliding direction of the clamping plate 3, the inner side wall of the sliding hole 35 is connected with the abutting block 351 in a sliding manner, and both ends of the abutting block 351 are located outside the sliding hole 35. The side wall of the connecting block 33 facing the abutting block 351 is provided with a plug hole 331 along the length direction of the sliding hole 35, and the inner side wall of the lower side of the opening of the plug hole 331 is obliquely provided with an abutting surface 3311; a driving surface 3511 is obliquely provided on the lower side of the end wall of the contact block 351 near the insertion hole 331. The driving surface 3511 is attached to the attaching surface 3311; when the clamping plate 3 moves to the abutting block 351 to abut against the workpiece, the workpiece can drive the abutting block 351 to move towards the plugging hole 331 so as to drive the connecting block 33 to move downwards, and at the same time, the elastic abutting piece 341 is compressed. The upper end of the connecting block 33 is connected with a limiting block 4, and the limiting block 4 can move downwards along with the connecting block 33 to compress the workpiece, so that the workpiece is further fixed.

Referring to fig. 4, a docking rod 41 is disposed between the stopper 4 and the connection block 33, one end of the docking rod 41 is welded to the lower surface of the stopper 4, and the other end extends downward. The upper end wall of the connecting block 33 is provided with a guide hole 332 downwards; the lower end of the opposite straw is inserted into the guide hole 332, and the outer peripheral wall of the opposite connecting rod 41 is slidably connected with the inner side wall of the guide hole 332, so that the distance between the limiting block 4 and the upper surface of the workbench 2 can be conveniently adjusted. The clamping plate 3 is provided with a locking member 36; in this embodiment, the locking member 36 includes a screw, the locking member 36 is screwed with the clamping plate 3, and one end of the locking member 36 extends into the guide hole 332 to abut against the docking rod 41, so as to fix the docking rod 41 and the limiting block 4.

Referring to fig. 5, an extension block 3512 is welded and fixed to a side wall of the abutment block 351; the inner side wall of the sliding hole 35 is provided with an extension groove 352 along the length direction of the sliding hole 35, and an extension block 3512 is positioned in the extension groove 352. An elastic abutment 3521 is disposed in the extension groove 352; in this embodiment, the elastic abutment 3521 is a spring; in another embodiment, the resilient abutment 3521 may also be a rubber pad. One end of the elastic abutting piece 3521 abuts against the limiting block 4, and the other end abuts against the inner side wall of one end, close to the plug hole 331, of the extension groove 352; when the clamping plate 3 moves away from the workpiece, the elastic abutting piece 3521 can push the abutting block 351 away from the insertion hole 331, so that the elastic abutting piece 341 pushes the connecting block 33 upwards, so that the limiting block 4 is separated from the workpiece, and the movement of the clamping plate 3 is facilitated.

Referring to fig. 6 and 7, a connection assembly 5 is connected between two clamping plates 3 located in the sliding groove 21 and between two clamping plates 3 located in the sliding groove 22. The connecting assembly 5 comprises a connecting gear 51 and connecting racks 52 positioned at both sides of the connecting gear 51; the connecting racks 52 are in one-to-one correspondence with the clamping plates 3, the length direction of each connecting rack 52 is set along the sliding direction of the corresponding clamping plate 3, and one end, far away from the connecting gear 51, of each connecting rack 52 is welded and fixed with the corresponding clamping plate 3. The position of the workbench 2, which is positioned at each connecting rack 52, is provided with a containing groove 23 for embedding the corresponding connecting rack 52. The two connecting racks 52 are engaged with the connecting gear 51, and when the connecting gear 51 rotates, the connecting racks 52 can drive the corresponding two clamping plates 3 to synchronously approach each other or synchronously separate from each other.

Referring to fig. 6 and 7, the table 2 is provided with a receiving groove 24 downwardly on the upper surface thereof at the intersection of the slide groove 21 and the slide groove 22. The two connecting gears 51 are sequentially arranged in the accommodating groove 24 along the up-down direction; the two connecting gears 51 have the same number of teeth and the two connecting gears 51 are coaxially arranged. An upper fixed shaft 511 is coaxially keyed to the upper connection gear 51, and a lower fixed shaft 512 is coaxially keyed to the lower connection gear 51. The lower end of the lower fixing shaft 512 extends downward and penetrates the table 2, and the lower fixing shaft 512 is rotatably connected with the table 2 through a bearing. The upper end wall of the lower fixed shaft 512 is provided with a rotation hole 5121 penetrating downwards; the lower end of the upper fixing shaft 511 is inserted into the lower rotation hole 5121, and the upper fixing shaft 511 is rotatably connected to the inner sidewall of the rotation hole 5121 through a bearing. The inner side wall of the upper end of the accommodating groove 24 is provided with a mounting groove 241 along the circumferential direction thereof, a mounting plate 2411 is placed in the mounting groove 241, and the mounting plate 2411 is fixed with the workbench 2 by a screw to seal the accommodating groove 24.

Referring to fig. 6 and 8, the lower surface of the table 2 is provided with a relief groove 25 penetrating in the width direction thereof, and the lower ends of the upper and lower fixing shafts 511 and 512 are both positioned in the relief groove 25. The lower fixed shaft 512 and the lower end of the upper fixed shaft 511 are both connected with transmission turbines 6 through coaxial keys, the position of the workbench 2 at each transmission turbine 6 is connected with a transmission worm 61 through bearings in a rotating way, the axial direction of the transmission worm 61 is arranged along the width direction of the workbench 2, and the transmission worm 61 is meshed with the transmission turbine 6 for drinking. Each of the driving worms 61 is coaxially keyed to a rotation shaft 611, and the rotation shaft 611 is rotatably coupled to the table 2 through a bearing. The bottom wall of the relief groove 25 at the position of the rotation shaft 611 is fixedly provided with a mounting block 26 by a screw, and the mounting block 26 is provided with two transmission screw holes 261 penetrating in the width direction of the table 2. The transmission screw holes 261 are in one-to-one correspondence with the rotation shafts 611, and one end of each rotation shaft 611 far away from the transmission worm 61 is inserted into the corresponding transmission screw hole 261 and extends to the same side of the workbench 2.

Referring to fig. 6 and 8, the rotation shaft 611 is provided with a fixing sleeve 612, and an outer side wall of the fixing sleeve 612 is screw-coupled with an inner side wall of the driving screw hole 261. A transmission key 6111 is fixedly installed on the peripheral wall of the rotation shaft 611, and the length direction of the transmission key 6111 is set along the axial direction of the rotation shaft 611. The inner side wall of the fixed sleeve 612 is provided with a transmission groove 6121 along the axial direction of the inner side wall; the transmission key 6111 is positioned in the transmission groove 6121, and the transmission key 6111 is in sliding connection with the inner side wall of the transmission groove 6121. Rotating the rotating shaft 611 can drive the corresponding connecting gear 51 to rotate, and meanwhile, the rotating shaft 611 can drive the corresponding fixing sleeve 612 to rotate; when rotation of the rotation shaft 611 is stopped, the fixing sleeve 612 is screw-engaged with the driving screw hole 261 to reduce the possibility of rotation of the rotation shaft 611.

Referring to fig. 6 and 9, the table 2 is provided with a driving shaft 27 at a position of the rotating shaft 611 at an end thereof remote from the driving worm 61, and the driving shaft 27 is rotatably coupled to the table 2 through a bearing. The workbench 2 is rotatably provided with two transmission shafts 28 at the position of the driving shaft 27; the driving shaft 27 is connected with the driving shaft 28 through gear transmission; when the drive shaft 27 is rotated, the two drive shafts 28 are rotated in synchronization.

Referring to fig. 6 and 9, the driving shafts 28 are in one-to-one correspondence with the rotation shafts 611, and a driving assembly 7 is connected between each driving shaft 28 and the corresponding rotation shaft 611, and the driving assembly 7 includes a fixed plate 71 and a sliding plate 72. The fixed plate 71 is welded and fixed with the end wall of the rotating shaft 611; the sliding plate 72 is sleeved outside the transmission shaft 28, and the sliding plate 72 is connected with the transmission shaft 28 in a key manner, and the sliding plate 72 can slide along the axial direction of the transmission shaft 28. The sliding plate 72 is provided with a driving protrusion 721, and in this embodiment, the driving protrusion 721 is provided in plurality in order along the circumferential direction of the driving shaft 28. One end of the transmission protrusion 721 is welded to a side wall of the sliding plate 72 facing the direction of the fixed plate 71, and the other end extends toward the direction of the fixed plate 71; the side wall of the fixing plate 71 at the position of each driving protrusion 721 is provided with a fixing groove 711 for inserting the corresponding driving protrusion 721. When the transmission shaft 28 rotates, the transmission protrusion 721 can push against the inner sidewall of the fixing groove 711 to drive the corresponding fixing plate 71 and the rotation shaft 611 to rotate. The side walls of the drive boss 721 on both sides in the circumferential direction of the drive shaft 28 are each provided with a guide surface 7211 in an inclined manner.

Referring to fig. 9, a limit ring 281 is welded and fixed to the peripheral wall of the drive shaft 28 on the side of the slide plate 72 remote from the fixed plate 71. An elastic connection 282 is provided between the sliding plate 72 and the drive shaft 28. In this embodiment, the elastic connection member 282 includes a spring, which is sleeved on the peripheral wall of the transmission shaft 28. One end of the elastic connection piece 282 is abutted against a side wall of the sliding plate 72, which is away from the fixed plate 71, and the other end is abutted against the limiting ring 281 to push the sliding plate 72, so that the risk that the transmission protrusion 721 is separated from the fixed groove 711 is reduced. When the rotation shaft 611 is blocked to stop the rotation during the rotation of the transmission shaft 28, the reverse acting force of the inner side wall of the fixing groove 711 to the transmission boss 721 increases; under the action of the guide surface 7211, the sliding plate 72 automatically moves toward the limit ring 281, so that the transmission shaft 28 continues to rotate.

The implementation principle of the embodiment of the application is as follows:

when clamping a workpiece, placing the workpiece in an area surrounded by four clamping plates 3, and attaching the lower surface of the workpiece to the upper surface of a workbench 2; then, the driving shaft 27 is rotated to drive the driving shaft 28 and the rotation shaft 611 to rotate, thereby driving the connection gear 51 to rotate to drive the chucking plate 3 toward the workpiece to chuck the workpiece.

When workpieces of different sizes are processed, the two opposite clamping plates 3 can synchronously approach the workpiece, so that the workpiece automatically moves to the center position between the two clamping plates 3, the center of the corresponding workpiece and the center of the upward-moving workpiece can automatically coincide, X, Y coordinates of the origin of the workpiece coordinate system are not required to be reset, X, Y coordinates of the origin of the workpiece coordinate system are reduced, and therefore the debugging efficiency of a machine tool is improved, and the efficiency of a technician of the machine tool is improved.

The embodiments of the present application are all preferred embodiments of the present application, and are not intended to limit the scope of the present application, wherein like reference numerals are used to refer to like elements throughout. Therefore: all equivalent changes in structure, shape and principle of the application should be covered in the scope of protection of the application.

Claims (5)

1. The novel efficient engraving and milling machine comprises a machine tool main body (1), wherein the machine tool main body (1) is provided with a workbench (2) for placing a workpiece to be processed; the method is characterized in that: the workbench (2) is provided with a sliding groove (21) along the length direction of the workbench, and the workbench (2) is provided with a sliding groove (22) along the width direction of the workbench; the inner side wall of the sliding groove (21) and the inner side wall of the sliding groove (22) are connected with two clamping plates (3) in a sliding manner, wherein the two clamping plates are used for clamping a workpiece to be processed; a connecting component (5) is connected between the two clamping plates (3) positioned in the sliding groove (21) and between the two clamping plates (3) positioned in the sliding groove (22), and the connecting component (5) is used for driving the corresponding two clamping plates (3) to synchronously approach each other or synchronously separate from each other; a fixing piece (311) for fixing the clamping plate (3) is arranged between the clamping plate (3) and the workbench (2);

the connecting assembly (5) comprises a connecting gear (51) which is rotationally connected with the workbench (2) and connecting racks (52) which are positioned at two sides of the connecting gear (51); the connecting racks (52) are in one-to-one correspondence with the clamping plates (3), and each connecting rack (52) is fixedly connected with the clamping plate (3); both connecting racks (52) are meshed with the connecting gear (51);

the two connecting gears (51) are connected with a rotating shaft (611), and the rotating shaft (611) is rotationally connected with the workbench (2); the rotating shaft (611) is connected with a fixed sleeve (612) in a sliding way along the axial direction of the rotating shaft, and the peripheral wall of the fixed sleeve (612) is in threaded connection with the workbench (2);

the workbench (2) is rotationally connected with a driving shaft (27), the driving shaft (27) is connected with two transmission shafts (28), and the two transmission shafts (28) are rotationally connected with the workbench (2); the driving shaft (27) can drive the two driving shafts (28) to synchronously rotate; the transmission shafts (28) are in one-to-one correspondence with the rotating shafts (611), and a transmission assembly (7) is connected between each transmission shaft (28) and the corresponding rotating shaft (611); when the rotation shaft (611) is blocked and stops rotating, the transmission shaft (28) can continue rotating;

the transmission assembly (7) comprises a fixed plate (71) fixedly connected with the rotating shaft (611) and a sliding plate (72) slidingly connected with the transmission shaft (28) along the axial direction of the transmission shaft (28); the sliding plate (72) is provided with a transmission protrusion (721) extending towards the direction of the fixed plate (71), and the fixed plate (71) is provided with a fixed groove (711) in plug-in fit with the transmission protrusion (721); the transmission bulge (721) is obliquely provided with guide surfaces (7211) along two sides of the circumferential direction of the transmission shaft (28); an elastic connecting piece (282) for driving the sliding plate (72) to move towards the fixed plate (71) is connected between the sliding plate (72) and the transmission shaft (28);

the two connecting gears (51) are sequentially arranged along the up-down direction; the connecting gear (51) positioned above is coaxially connected with an upper fixed shaft (511), the connecting gear (51) positioned below is coaxially connected with a lower fixed shaft (512), and the lower fixed shaft (512) is rotationally connected with the workbench (2); the upper end wall of the lower fixed shaft (512) is downwards penetrated and provided with a rotating hole (5121), the upper fixed shaft (511) is inserted into the rotating hole (5121), and the upper fixed shaft (511) is rotationally connected with the inner side wall of the rotating hole (5121).

2. The novel efficient cnc engraving and milling machine according to claim 1, wherein: the clamping plate (3) is connected with an abutting block (351) in a sliding manner along the sliding direction of the clamping plate and is used for abutting against the side wall of a workpiece to be processed; the clamping plate (3) is connected with a connecting block (33) in a sliding manner along the up-down direction, and the connecting block (33) is provided with a plug hole (331) for inserting one end of the abutting block (351); the connecting block (33) is provided with a limiting block (4) for abutting against the upper surface of a workpiece to be processed; the abutting block (351) is obliquely provided with a driving surface (3511) for abutting against the inner side wall of the lower side of the plug hole (331); the abutting block (351) is connected with an elastic abutting piece (3521) for driving the abutting block (351) to move in a direction away from the plug hole (331).

3. The novel efficient cnc engraving and milling machine according to claim 2, wherein: the inner side wall of the plug hole (331) is provided with a joint surface (3311) for joint with the driving surface (3511).

4. The novel efficient cnc engraving and milling machine according to claim 2, wherein: an elastic pushing piece (341) for driving the connecting block (33) to move upwards is arranged between the connecting block (33) and the clamping plate (3).

5. The novel efficient cnc engraving and milling machine according to claim 2, wherein: the connecting block (33) is connected with a butt joint rod (41) in a sliding manner along the up-down direction, and the connecting block (33) is provided with a locking piece (36) for fixing the butt joint rod (41); the limiting block (4) is fixedly connected with the butt joint rod (41).