A carving machine

Abstract

The present invention provides an engraving machine, which belongs to the technical field of mechanical processing equipment. It solves the problem of reduced clamping and positioning accuracy of existing engraving machines. The engraving machine includes a frame and a crossbeam arranged in the transverse direction, a tool is arranged on the frame, at least one lower clamping member is arranged at the lower part of the frame, at least one upper clamping member that can be aligned with the lower clamping member is arranged on the crossbeam, columns are arranged on both sides of the frame, and lifting seats are arranged on the two columns along the vertical sliding direction. The crossbeam is slidably arranged on one of the lifting seats along the length direction, and a positioning structure that can position the crossbeam when the upper clamping member is aligned with the lower clamping member is arranged on the other lifting seat. The engraving machine is convenient for hoisting workpieces and has high clamping and positioning accuracy.

Description

Technical Field

[0001] The invention belongs to the technical field of mechanical processing equipment and relates to an engraving machine. Background Art

[0002] From the processing principle, engraving is a combination of drilling and milling processing. It has a wide range of applications, including woodworking engraving machines, laser engraving machines, advertising engraving machines, jade engraving machines, stone engraving machines, cylindrical engraving machines, etc. The application range of engraving machines is very wide, and it has even replaced manual engraving technology, laying the foundation for large-scale and rapid production of products.

[0003] Engraving machines are divided into vertical engraving machines and horizontal engraving machines. The vertical engraving machine is mainly used for engraving vertically arranged columnar workpieces. A transversely arranged crossbeam is provided on the engraving machine, and a downwardly facing upper clamp is provided on the crossbeam. A lower clamp is provided at the lower part of the frame, and the two ends of the columnar workpiece are clamped and positioned by the upper clamp and the lower clamp respectively. In the actual processing process, the overall size of the columnar workpiece is large and the weight is heavy. When the workpiece is loaded, a lifting equipment is required for lifting. Usually, the upper end of the workpiece is connected by two lifting ropes. The lifting equipment lifts the workpiece vertically through the lifting ropes, and then lowers it vertically from the upper part of the engraving machine until the lower end of the workpiece rests on the lower clamp. Since the upper clamp is set on the crossbeam, the crossbeam will block the vertical lowering of the workpiece.

[0004] In response to the above problems, a Chinese utility model patent application (application number: 201720309126.6) discloses a large vertical stereoscopic engraving machine, wherein an upper clamping member is arranged on a crossbeam, and the crossbeam is hinged on an upper and lower sliding mechanism, and the crossbeam can be one or two sections. When it is necessary to hoist the workpiece, the crossbeam is swung forward and opened to avoid interference with the workpiece. After the workpiece is lowered into place, the crossbeam is reset and swung above the workpiece, and then the crossbeam is lowered so that the upper clamping member is positioned at the upper end of the workpiece, that is, the patent discloses a swinging crossbeam structure, and a Chinese invention patent application (application number: 201810128785.9) also discloses an engraving machine, wherein the two ends of the crossbeam are respectively arranged on a lifting frame through a horizontal sliding mechanism, and the lifting frame is arranged on the columns on both sides through a lifting mechanism, and the upper clamping assembly is arranged on the crossbeam corresponding to the lower clamping device, and when the crossbeam slides horizontally back and forth, the upper clamping assembly can be The part is staggered or corresponding to the lower clamping device up and down, so that the crossbeam is moved to avoid it when lifting the workpiece, that is, the patent discloses a front-to-back translational crossbeam, however, the swinging crossbeam needs to swing and sweep a larger fan-shaped area, and the front-to-back translational crossbeam needs to move back and forth and sweep a larger rectangular area, and the workpiece is lifted by two ropes, one end of the rope is connected to the upper end of the workpiece, and the other end extends upward and is connected to the lifting equipment. Therefore, after the workpiece is lowered onto the lower clamping component, the swinging process of the swinging crossbeam and the translation process of the front-to-back translational crossbeam will interfere with the rope. Therefore, it is necessary to release the rope first after the workpiece is lowered onto the lower clamping component, and then pre-position the workpiece through other positioning equipment, and then swing the beam or the front-to-back translational beam for clamping, which makes the entire lifting process more troublesome, and after the rope is released, it is easy to cause the workpiece to shift, tilt, etc., resulting in reduced clamping and positioning accuracy. Of course, for the swinging beam, the beam is often under stress at the hinged end, the force is uneven, and then local excessive wear occurs. Both ends of the front and rear translational beam are driven by screws. There are also certain assembly errors between the two ends and the screws. After long-term use, it is easy to cause the two ends of the beam to move out of sync, which will also lead to reduced accuracy of clamping and positioning. Summary of the invention

[0005] The purpose of the present invention is to solve the above problems in the existing technology and to provide an engraving machine to solve the problem of ensuring the clamping and positioning accuracy on the basis of convenient workpiece hoisting.

[0006] The objective of the present invention can be achieved through the following technical scheme: an engraving machine, comprising a frame, a tool being arranged on the frame, columns being provided on both sides of the frame, lifting seats being provided on the two columns for vertical sliding, crossbeams being provided on the two lifting seats for transverse arrangement, at least one lower clamping piece being provided at the lower part of the frame, and an upper clamping piece being provided on at least one crossbeam for alignment with the lower clamping piece, characterized in that the crossbeams are slidably arranged on the lifting seats along the length direction, the ends of the two crossbeams are opposite, and a positioning structure is provided between the ends of the two crossbeams for positioning the two crossbeams when the upper clamping piece is aligned with the lower clamping piece.

[0007] The workpieces mainly include large columnar workpieces, which are vertically lifted to the top of the frame by two lifting ropes and aligned with the lower clamping piece. The two beams move outward along their length direction, that is, move outward along the horizontal direction of the frame to avoid interference with the descent of the workpiece. The workpiece descends and makes the lower end abut against the lower clamping piece. Then the two beams move inward laterally to align the upper clamping piece with the lower clamping piece. At the same time, the two beams are positioned by the positioning mechanism, and the lifting seat descends to make the upper clamping piece abut against the upper end of the workpiece. The beam moves along its length direction, which is different from the existing swinging beam that needs to swing and sweep a larger fan-shaped area. , the front-to-back translational crossbeam needs to move forward and backward and sweep across a larger rectangular area. Both have high requirements for the horizontal area range and are prone to interfere with the lifting ropes that connect the workpiece and extend upward to the lifting equipment, resulting in the need to release the lifting ropes and pre-position the workpiece before positioning. In comparison, the movement trajectory of this crossbeam is a straight line along the horizontal direction, which has small requirements for the horizontal area range, thereby reducing the possibility of interference with the lifting ropes. There is no need to release the lifting ropes and pre-position the workpiece. The workpiece is still moved and lowered by the crossbeam under the positioning of the lifting ropes, so that the upper clamp is clamped and positioned on the workpiece, so the entire lifting process is more convenient. The invention can also be used to fix the workpiece in a convenient manner, and the workpiece can be easily displaced, tilted, or otherwise misaligned in the conventional process of first releasing the sling and then pre-positioning. The invention does not require the sling to be released, but directly clamps the workpiece, which results in a higher positioning accuracy for the workpiece. Furthermore, compared with the conventional swing beam, which needs to ensure the lateral and front-to-back position accuracy of the upper clamping member when it is swung into position, and the front-to-back translation beam, which needs to ensure the lateral and front-to-back position accuracy due to synchronization issues at both ends, the beam of the invention only moves laterally along its own length, so there will be no deviation in the front-to-back direction, and the engraving machine has been assembled in the process. The position accuracy of the upper clamping member and the lower clamping member in the front-to-back direction is guaranteed, and the crossbeam only needs to ensure the position accuracy in the lateral direction. Therefore, the position accuracy of the upper clamping member is higher. At the same time, due to the lateral movement of the crossbeam, its own center of gravity deviates from the support of the lifting seat, which is easy to cause slight wear of the crossbeam, slight tilt up and down, and other phenomena that affect the position accuracy of the upper clamping member during long-term use. The two crossbeams of the present application are positioned relative to each other through the positioning structure during the clamping process of the workpiece, so that each other's ends are stably positioned, making the two beams more stable, thereby ensuring the clamping and positioning accuracy of the workpiece.

[0008] In the above-mentioned engraving machine, the positioning structure includes a positioning head located at the inner end of one beam and a positioning hole located on the inner end face of another beam, the positioning head is arranged opposite to the positioning hole, and when the upper clamping member is aligned with the lower clamping member, the positioning head can be inserted and positioned in the positioning hole, and the lifting seat is also provided with a locking member that can lock the beam horizontally. When the positioning head is inserted into the positioning hole, the ends of the two beams can support each other, so that the beam remains stable, and the entire lifting process is more convenient. The relative arrangement of the two beams can reduce the length of the beam, make the beam light, and reduce the deviation of the center of gravity, thereby making the beam more stable. The locking member can lock the beam horizontally to avoid displacement during the workpiece processing, and the stability is higher. Of course, the positioning structure can also be a plurality of positioning teeth provided on the inner end faces of the two beams, and the positioning teeth on the two beams are meshed when the upper clamping member is aligned with the lower clamping member.

[0009] In the above-mentioned engraving machine, the two beams are both in the shape of square tubes, and the positioning hole is the inner hole of one beam, the positioning head is in the shape of a table or cone, and the smaller end of the positioning head faces the positioning hole, and the positioning head is a solid structure. The positioning head can be in the shape of a truncated table, a multi-sided table, a cone or a multi-sided pyramid, etc. Even if the beam is slightly tilted in position during long-term use, when the table-shaped or cone-shaped positioning head is inserted into the positioning hole, the inclined surface on the positioning head can correct the tilt of the beam, that is, the two beams can relatively correct the posture, so that the beam maintains a precise posture and position, and during the correction process, the solid structure positioning head has a higher structural stability, avoiding deformation such as dents that affect stability.

[0010] In the above-mentioned engraving machine, the two lifting seats are fixedly connected with guide seats, and the guide seats are provided with guide channels with rectangular cross sections in the transverse direction. The two crossbeams are respectively slidably arranged in the guide channels of the two guide seats, and the outer side surfaces of the crossbeams are slidably matched with the inner side surfaces of the guide channels; the bottoms of the two guide seats are provided with avoidance gaps in the transverse direction, and the avoidance gaps penetrate the two ends of the guide seats, and the upper clamping member can pass through the avoidance gaps when the crossbeams move. The crossbeams are supported by the guide seats during the transverse movement, and the crossbeams with rectangular cross sections and the guide channels provide a larger matching area between the crossbeams and the guide channels. After the sliding matching of the two, the crossbeams have higher stability, thereby ensuring the moving position accuracy and clamping stability of the crossbeams, improving the clamping positioning accuracy, and allowing the upper clamping member to slide through the avoidance gaps during the movement of the crossbeams to avoid interference.

[0011] In the above-mentioned engraving machine, the locking member includes two pins, which are respectively inserted into the guide seat along the vertical sliding direction, and the upper side surfaces of the two beams are provided with a plug hole along the vertical direction. When the positioning head is inserted into the positioning hole, the two pins can be respectively inserted into the plug holes of the two beams. During the movement of the beam, the pin can be against the upper side surfaces of the two beams, and when the beam is moved into place, the pin is just opposite to the plug hole and falls into it, thereby locking the beam and ensuring the position accuracy of the two beams; of course, the locking member can also be two bolts, and the two guide seats are provided with screw holes along the vertical direction, and the two bolts are respectively screwed into the two screw holes, and the lower ends of the bolts can be pressed and locked on the upper side surfaces of the two beams; of course, the locking member can also be a clamping method such as a retaining spring, and two slots are provided circumferentially on the outer side surface of the beam, and the retaining springs are clamped in the two slots. When the upper clamping member is aligned with the lower clamping member, the two retaining springs are respectively located at the two ends of the guide seat and against the end surface of the guide seat. Of course, a tight-fitting locking method can also be included.

[0012] In the above-mentioned engraving machine, racks are fixedly connected to the outer sides of the two beams along the length direction, and the racks pass through the avoidance gap. Motors are fixedly connected to the two guide seats, and a transmission shaft is rotatably connected to the outer sides of the guide seats. A gear is fixedly connected to one end of the transmission shaft, and the gear is meshed with the rack. The motor shaft of the motor is connected to the other end of the transmission shaft. The matching position of the beam and the guide seat is relatively stable, so an avoidance gap is provided on the guide seat, so that the gear and the rack match at the guide seat, and the meshing stability of the two is higher, thereby improving the stroke accuracy of the beam. Of course, the beam can also be driven by a screw and a nut. Specifically, the screw is rotatably connected to the beam along the length direction of the beam, and the nut is rotatably connected to the guide seat, and the nut is screwed to the screw, and the motor is fixed to the beam and connected to the screw.

[0013] A carving machine comprises a frame and a crossbeam arranged in the transverse direction, the frame is provided with a tool, at least one lower clamping piece is provided at the lower part of the frame, the crossbeam is provided with at least one upper clamping piece that can be aligned with the lower clamping piece, both sides of the frame are provided with columns, and lifting seats are provided on the two columns for vertical sliding. It is characterized in that the crossbeam is slidably arranged on one of the lifting seats along the length direction, and a positioning structure is provided on the other lifting seat for positioning the crossbeam when the upper clamping piece is aligned with the lower clamping piece.

[0014] Similarly, the crossbeam moves along its length, and its moving trajectory is a straight line along the horizontal direction. It has a small requirement for the horizontal area range, thereby reducing the possibility of interference with the lifting rope. There is no need to release the lifting rope to pre-position the workpiece. The workpiece is still moved and lowered by the crossbeam under the positioning of the lifting rope, so that the upper clamping member is clamped and positioned on the workpiece, so the whole lifting process is more convenient. Of course, the existing process of pre-positioning after releasing the lifting rope is prone to cause large workpieces to shift, tilt and other deviations. The process of directly clamping without releasing the lifting rope makes the positioning accuracy of the workpiece higher. Furthermore, the crossbeam of the present application only moves along its own length in the horizontal direction, so it does not move in the front and rear directions. Deviations will occur. During the assembly process of the engraving machine, the position accuracy of the upper clamping part and the lower clamping part in the front-to-back direction has been guaranteed, and the crossbeam only needs to ensure the position accuracy in the lateral direction. Therefore, the position accuracy of the upper clamping part is higher. At the same time, in view of the lateral movement of the crossbeam, its own center of gravity deviates from the support of the lifting seat, which is easy to cause slight wear of the crossbeam, slight tilt up and down, and other phenomena that affect the position accuracy of the upper clamping part during long-term use. Therefore, the crossbeam of the present application can be positioned on another lifting seat through the positioning structure when moving and positioning, so that the longer end of the crossbeam is supported and positioned, so that the crossbeam has higher stability during the clamping process, thereby ensuring the clamping and positioning accuracy of the workpiece.

[0015] In the above-mentioned engraving machine, the positioning structure includes a positioning seat fixed on another lifting seat, and a through hole with a rectangular cross-section is opened horizontally on the positioning seat, and the crossbeam is in the shape of a square tube. When the upper clamping member is aligned with the lower clamping member, the end of the crossbeam is inserted and positioned in the through hole, and the outer side surface of the crossbeam is in contact with the inner side surface of the through hole. The end of the crossbeam opposite to the positioning seat has a plug connector, and the plug connector is in the shape of a table or a cone, and the smaller end of the plug connector faces the positioning seat. The plug connector is a solid structure, and the positioning seat is also provided with a locking member that can lock the crossbeam laterally. The crossbeam that matches the positioning seat is long and needs to cover the lateral size of the frame. When the upper clamping piece is moved and positioned so that the lower clamping piece is aligned with the upper clamping piece, the lateral end is located in the positioning hole, thereby obtaining the support positioning of the positioning hole, and at the same time, the inner side surface of the positioning hole is in contact with the outer side surface of the crossbeam, thereby maintaining the end of the crossbeam, so that the crossbeam remains stable. The locking piece can lock the crossbeam laterally to avoid displacement during the workpiece processing, and the stability is higher. The plug-in joint can be a truncated cone, a multi-faceted cone, a cone or a multi-faceted pyramid, etc. The plug-in joint can guide the end of the crossbeam, thereby correcting the posture of the crossbeam and allowing the crossbeam to be smoothly inserted into the through hole to ensure the positioning accuracy of the crossbeam. Similarly, the positioning head of the solid structure has a higher structural stability during the correction process, avoiding deformation such as depression that affects the stability. Of course, the positioning structure can also be fixed to the positioning block on the lifting seat, and a sliding groove is provided on the beam along the length direction. When the upper clamping piece is aligned with the lower clamping piece, the positioning block can slide into the sliding groove.

[0016] In the above-mentioned engraving machine, the locking member includes a locking pin, which is inserted into the positioning seat along the vertical sliding direction, and a locking hole is vertically opened on the upper side surface of the crossbeam. When the upper clamping member is aligned with the lower clamping member, the locking pin can be inserted into the locking hole of the crossbeam. During the movement of the crossbeam, the locking pin can be against the upper side surface of the crossbeam, and when it is moved into place, the locking pin is just opposite to the locking hole and falls into it, thereby locking the crossbeam and ensuring the position accuracy of both; of course, the locking member can also be a bolt, and the positioning seat is vertically opened with a screw hole, the bolt is screwed in the screw hole, and the lower end of the bolt can be pressed and locked on the upper side surface of the crossbeam; of course, the locking member can also be a retaining spring, and two clamping grooves are circumferentially opened on the outer side surface of the crossbeam, and the retaining springs are clamped in the two clamping grooves. When the upper clamping member is aligned with the lower clamping member, the two retaining springs are respectively located at the two ends of the positioning seat and against the end surface of the positioning seat.

[0017] In the above-mentioned engraving machine, a guide seat is fixedly connected to one of the lifting seats, and a guide channel with a rectangular cross section is opened horizontally on the guide seat. The crossbeam is slidably arranged in the guide channel of the guide seat, and the outer side surface of the crossbeam is slidably matched with the inner side surface of the guide channel. An avoidance gap is opened horizontally on the bottom of the guide seat, and the avoidance gap runs through both ends of the guide seat, and the upper clamping member can pass through the avoidance gap when the crossbeam moves. The crossbeam is supported by the guide seat during the lateral movement, and the crossbeam with a rectangular cross section and the guide channel make the crossbeam and the guide channel have a larger matching area. After the sliding match between the two, the crossbeam has a higher stability, thereby ensuring the moving position accuracy and clamping stability of the crossbeam, improving the clamping positioning accuracy, and allowing the upper clamping member to slide through the avoidance gap during the movement of the crossbeam to avoid interference.

[0018] Compared with the existing technology, this engraving machine has the following advantages:

[0019] 1. Since the moving trajectory of the beam is a straight line along the horizontal direction, the horizontal area requirement is small, thus reducing the possibility of interference with the lifting rope. There is no need to release the lifting rope to pre-position the workpiece. The workpiece still moves and descends under the positioning of the lifting rope, so that the upper clamp is clamped and positioned on the workpiece, making the entire lifting process more convenient.

[0020] 2. Since the movement of the beam will not interfere with the lifting rope, the beam can be directly moved and the workpiece can be clamped without releasing the lifting rope. This process makes the positioning accuracy of the workpiece higher.

[0021] 3. Since the crossbeam only moves along its own length in the horizontal direction, there will be no deviation in the front-to-back direction. The position accuracy of the upper and lower clamps in the front-to-back direction has been guaranteed during the assembly process of the engraving machine, and the crossbeam only needs to ensure the position accuracy in the horizontal direction, so the position accuracy of the upper clamp is higher.

[0022] 4. Since the positioning structure can position the end of the beam, the stability of the beam is higher during the clamping process, thereby ensuring the clamping positioning accuracy of the workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a three-dimensional structural diagram of the engraving machine.

[0024] Figure 2 It is the structural front view of the engraving machine.

[0025] Figure 3 yes Figure 2 Local structural cross-sectional view at AA in the middle.

[0026] Figure 4 yes Figure 1A magnified view of the structure at point B.

[0027] Figure 5 It is a cross-sectional view of the engraving machine at the crossbeam.

[0028] Figure 6 yes Figure 5 Enlarged view of the structure at C in the middle.

[0029] Figure 7 yes Figure 5 Enlarged view of the structure at D in the middle.

[0030] Figure 8 It is a three-dimensional structural schematic diagram of the engraving machine in the second embodiment.

[0031] Fig. 9 yes Figure 8 Enlarged view of the structure at E in the middle.

[0032] Fig.10 It is a partial structural sectional view of the engraving machine in the second embodiment.

[0033] Fig.11 It is a three-dimensional structural schematic diagram of the engraving machine in the third embodiment.

[0034] In the figure, 1, frame; 11, column; 111, slide rail; 112, screw; 12, tool; 121, cutting disk; 122, carving tool head; 13, lower clamping member; 14, rotating motor; 15, driving shaft; 16, lifting motor; 2, crossbeam; 21, upper clamping member; 22, positioning hole; 23, positioning head; 24, socket; 25, plug connector; 26, locking hole; 27, rack; 3, lifting seat; 31, slider; 32, screw sleeve; 4, positioning seat; 41, through hole; 42, locking pin; 5, guide seat; 51, guide block; 52, guide plate; 53, guide channel; 54, avoidance gap; 55, latch; 6, motor; 61, transmission shaft; 62, gear; 7, horizontal moving seat; 8, longitudinal moving seat; 9, knife seat; 10, vertical moving seat. DETAILED DESCRIPTION

[0035] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0036] Embodiment 1:

[0037] like Figure 1 As shown, an engraving machine includes a frame 1, a tool 12 is arranged on the frame 1, and columns 11 are arranged on both sides of the frame 1. Lifting seats 3 are arranged on the two columns 11 along the vertical sliding direction. The two lifting seats 3 are arranged opposite to each other. Figure 2 , Figure 3As shown, a slide rail 111 is vertically fixed on the column 11, a slider 31 is fixed on the lifting seat 3, the slider 31 is slidably connected to the slide rail 111, and a screw rod 112 is rotatably connected to the column 11, a screw sleeve 32 is fixed to the lifting seat 3, the screw sleeves 32 on the two lifting seats 3 are respectively screwed on the two screw rods 112, the lower ends of the two screw rods 112 are connected to a transversely arranged driving shaft 15, the driving shaft 15 is driven by a lifting motor 616, so as to drive the lifting seats 3 on the two columns 11 to rise and fall synchronously, and the two lifting seats 3 are provided with a crossbeam 2, that is, there are two crossbeams 2, and the two crossbeams 2 are connected to the lifting seat 3. The cross beams 2 are all arranged horizontally, and the ends of the two cross beams 2 are opposite to each other. The two cross beams 2 can slide along the length direction. A lower clamping member 13 is provided at the bottom of the frame 1, and an upper clamping member 21 is provided on the lower side surface of one of the cross beams 2. The lower clamping member 13 is a clamping head fixed on a rotating motor 614, and the upper clamping member 21 is a top point arranged downward. The alignment and staggering of the upper clamping member 21 and the lower clamping member 13 are achieved by the movement of the cross beam 2. A positioning structure is provided between the ends of the two cross beams 2. When the upper clamping member 21 is aligned with the lower clamping member 13, the positioning structure can position the ends of the two cross beams 2.

[0038] Specifically, combined Figure 4 As shown, the two lifting seats 3 are fixedly connected with guide seats 5, and the guide seats 5 are formed by two guide blocks 51 distributed up and down and a guide plate 52 fixed on the guide blocks 51, so that a guide channel 53 arranged horizontally along the frame 1 is formed between the two guide blocks 51, and the cross section of the guide channel 53 is rectangular, and the cross section of the cross beam 2 is rectangular, and the two cross beams 2 are respectively slidably arranged in the guide channels 53 of the two guide seats 5, and the outer side surface of the cross beam 2 is slidably matched with the inner side surface of the guide channel 53, and the outer side surface of the guide seat 5 has a long strip of avoidance notch 54, and the avoidance notch 54 is arranged along the frame 1. It is arranged horizontally, and the avoidance gap 54 is formed by the gap between the guide plate 52 and the lower guide block 51. When the beam 2 moves horizontally, the upper clamping piece 21 can pass through the avoidance gap 54. A rack 27 is fixedly connected to the outer surface of the beam 2 in the length direction, and the rack 27 passes through the avoidance gap 54. Motors 6 are fixed on the two guide seats 5, and transmission shafts 61 are rotatably connected to the outer surfaces of the guide seats 5. The transmission shaft 61 is arranged vertically, and a gear 62 is fixedly connected to the lower end of the transmission shaft 61, and the gear 62 is meshed with the rack 27. The motor shaft of the motor 6 is connected to the upper end of the transmission shaft 61.

[0039] Combination Figure 5 , Figure 6As shown, the positioning structure includes a positioning head 23 located at the inner end of one beam 2 and a positioning hole 22 located on the inner end face of the other beam 2. The positioning head 23 is arranged opposite to the positioning hole 22. Both beams 2 are in the shape of square tubes, and the positioning hole 22 is the inner hole of one beam 2. The positioning head 23 is in the shape of a quadrangular pyramid, and the smaller end of the positioning head 23 faces the positioning hole 22. The positioning head 23 is a solid structure. When the upper clamp 21 is aligned with the lower clamp 13, the positioning head 23 can be inserted and positioned in the positioning hole 22. Figure 7 As shown, the two guide seats 5 are both vertically slidably plugged with pins 55, and the upper side surfaces of the two beams 2 are vertically provided with plug holes 24. When the positioning heads 23 are plugged into the positioning holes 22, the two pins 55 can be respectively plugged into the plug holes 24 of the two beams 2.

[0040] Embodiment 2:

[0041] The structure of the engraving machine is basically the same as that of the first embodiment, except that Figure 8 As shown, the number of the cross beam 2 is one, the length of the cross beam 2 is relatively long, it is arranged horizontally and its two ends can extend to the two columns 11 respectively, and a guide seat 5 is fixed on one of the lifting seats 3, combined with Fig. 9 As shown, the guide seat 5 includes two guide blocks 51 distributed up and down, one of which is fixed with a guide plate 52, so that a guide channel 53 is formed between the two guide blocks 51, the crossbeam 2 is slidably inserted into the guide channel 53, and the outer side surface of the crossbeam 2 is slidably matched with the inner side surface of the guide channel 53, and an avoidance gap 54 arranged in the transverse direction is formed between the guide plate 52 and the lower guide block 51, and when the crossbeam 2 moves laterally, the upper clamping member 21 can pass through the avoidance gap 54, similarly, a rack 27 is fixedly connected to the outer side surface of the crossbeam 2 along the length direction, and the rack 27 passes through the avoidance gap 54, a motor 6 is fixed to the guide seat 5, and a transmission shaft 61 is rotatably connected to the outer side surface of the guide seat 5, the transmission shaft 61 is vertically arranged, a gear 62 is fixedly connected to the lower end of the transmission shaft 61, and the gear 62 is meshed with the rack 27, and the motor shaft of the motor 6 is connected to the upper end of the transmission shaft 61. A lower clamping member 13 is provided at the bottom of the frame 1, and an upper clamping member 21 is provided on the lower side of the beam 2. The upper clamping member 21 and the lower clamping member 13 are aligned and staggered by the movement of the beam 2. A positioning structure is provided on the other lifting seat 3. When the upper clamping member 21 is aligned with the lower clamping member 13, the positioning structure can position the end of the beam 2.

[0042] Specifically, combined Fig.10As shown, the positioning structure includes a positioning seat 4, which is fixed on another lifting seat 3. A through hole 41 with a rectangular cross section is opened horizontally on the upper edge of the positioning seat 4. The cross beam 2 is in the shape of a square tube. When the upper clamp 21 is aligned with the lower clamp 13, the end of the cross beam 2 is inserted and positioned in the through hole 41, and the outer side of the cross beam 2 is in contact with the inner side of the through hole 41. The end of the cross beam 2 opposite to the positioning seat 4 has a plug connector 25, which is in the shape of a quadrangular pyramid, and the smaller end of the plug connector 25 faces the positioning seat 4. The plug connector 25 is a solid structure. A locking pin 42 is inserted vertically and slidably on the upper edge of the positioning seat 4, and a locking hole 26 is opened vertically on the upper side of the cross beam 2. When the upper clamp 21 is aligned with the lower clamp 13, the locking pin 42 can be inserted into the locking hole 26 of the cross beam 2.

[0043] Embodiment three:

[0044] The structure of the engraving machine is basically the same as that of the second embodiment, except that Fig.11 As shown, the tool 12 includes a cutting disc 121 and an engraving tool head 122. A vertical movable seat 10 is connected to the frame 1 in a vertical sliding manner, a horizontal movable seat 7 is connected to the vertical movable seat 10 in a horizontal sliding manner, a longitudinal movable seat 8 is connected to the horizontal movable seat 7 in a front-to-back sliding manner, and a tool holder 9 is rotatably connected to the longitudinal movable seat 8. The engraving tool head 122 is installed at one end of the tool holder 9, and the cutting movable disc 121 is installed at the other end of the tool holder 9, that is, the engraving tool head 122 and the cutting movable disc 121 are in opposite directions. The switching of the cutting disc 121 and the engraving tool head 122 is achieved by rotating the tool holder 9, and the engraving of different positions of the workpiece is achieved by the vertical movable seat 10, the horizontal movable seat 7 and the longitudinal movable seat 8.

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

[0046] Although the terms such as rack 1, column 11, and slide rail 111 are used more frequently in this article, the possibility of using other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the present invention; interpreting them as any additional restrictions is contrary to the spirit of the present invention.

Claims

1. An engraving machine, comprising a frame (1) and a crossbeam (2) arranged in a transverse direction, wherein a tool (12) is arranged on the frame (1), at least one lower clamping member (13) is arranged at the lower part of the frame (1), and at least one upper clamping member (21) capable of being aligned with the lower clamping member (13) is arranged on the crossbeam (2), both sides of the frame (1) are provided with columns (11), and both of the columns (11) are provided with lifting seats (3) along the vertical sliding direction, characterized in that: The cross beam (2) is slidably arranged on one of the lifting seats (3) along the length direction, and the other lifting seat (3) is provided with a positioning structure capable of positioning the cross beam (2) when the upper clamping member (21) is aligned with the lower clamping member (13); a guide seat (5) is fixedly connected to one of the lifting seats (3), and a guide channel (53) is opened on the guide seat (5) in the transverse direction, and the cross beam (2) is slidably arranged in the guide channel (53) of the guide seat (5), and the bottom of the guide seat (5) is fixedly connected to the guide seat (5). An escape notch (54) is opened along the horizontal direction of the guide seat (5), and the escape notch (54) passes through the two ends of the guide seat (5), and when the cross beam (2) moves, the upper clamping member (21) can pass through the escape notch (54), and the positioning structure includes a positioning seat (4) fixed on another lifting seat (3), and a through hole (41) is opened along the horizontal direction of the positioning seat (4), and when the upper clamping member (21) is aligned with the lower clamping member (13), the end of the cross beam (2) is inserted and positioned in the through hole (41).

2. The engraving machine according to claim 1, characterized in that The cross section of the through hole (41) is rectangular, and the cross beam (2) is in the shape of a square tube. When the upper clamping member (21) is aligned with the lower clamping member (13), the outer side surface of the cross beam (2) fits with the inner side surface of the through hole (41), and the positioning seat (4) is also provided with a locking member capable of transversely locking the cross beam (2).

3. The engraving machine according to claim 2, characterized in that: The end of the cross beam (2) opposite to the positioning seat (4) has a plug connector (25), the plug connector (25) is in a table shape or a cone shape, and the smaller end of the plug connector (25) faces the positioning seat (4).

4. The engraving machine according to claim 2 or 3, characterized in that: The locking member comprises a locking pin (42) which is inserted into the positioning seat (4) in a vertical sliding manner. A locking hole (26) is vertically opened on the upper side surface of the cross beam (2). When the upper clamping member (21) is aligned with the lower clamping member (13), the locking pin (42) can be inserted into the locking hole (26) of the cross beam (2).

5. The engraving machine according to claim 2 or 3, characterized in that: The cross section of the guide channel (53) is rectangular, and the outer side surface of the crossbeam (2) is slidably matched with the inner side surface of the guide channel (53).

6. The engraving machine according to claim 5, characterized in that: A rack (27) is fixedly connected to the outer surface of the crossbeam (2) along the length direction, and the rack (27) passes through the avoidance gap (54); a motor (6) is fixedly connected to the guide seat (5); a transmission shaft (61) is rotatably connected to the outer surface of the guide seat (5); a gear (62) is fixedly connected to one end of the transmission shaft (61), and the gear (62) is meshed with the rack (27); and a motor shaft of the motor (6) is connected to the other end of the transmission shaft (61).

7. An engraving machine, comprising a frame (1), the frame (1) being provided with a tool (12), both sides of the frame (1) being provided with columns (11), both columns (11) being provided with lifting seats (3) sliding in a vertical direction, both lifting seats (3) being provided with crossbeams (2) arranged in a transverse direction, at least one lower clamping member (13) being provided at the lower part of the frame (1), at least one crossbeam (2) being provided with an upper clamping member (21) capable of being aligned with the lower clamping member (13), characterized in that: The cross beams (2) are both slidably arranged on the lifting seat (3) along the length direction, the ends of the two cross beams (2) are opposite to each other, and a positioning structure is provided between the ends of the two cross beams (2) for positioning the two cross beams (2) when the upper clamping member (21) is aligned with the lower clamping member (13); the two lifting seats (3) are both fixedly connected with a guide seat (5), and the guide seat (5) is provided with a guide channel (53) in the transverse direction, and the two cross beams (2) are respectively slidably arranged in the guide channels (53) of the two guide seats (5), and the bottoms of the two guide seats (5) are provided with an avoidance gap (54) in the transverse direction, and the avoidance gap (54) runs through the two ends of the guide seat (5), and when the cross beam (2) moves, the upper clamping member (21) can pass through the avoidance gap (54).

8. The engraving machine according to claim 7, characterized in that: The positioning structure comprises a positioning head (23) located at the inner end of one crossbeam (2) and a positioning hole (22) located on the inner end surface of the other crossbeam (2); the positioning head (23) and the positioning hole (22) are arranged opposite to each other, and when the upper clamping member (21) is aligned with the lower clamping member (13), the positioning head (23) can be inserted and positioned in the positioning hole (22); the two crossbeams (2) are both square tube-shaped, and the positioning hole (22) is the inner hole of one crossbeam (2); the positioning head (23) is table-shaped or cone-shaped, and the smaller end of the positioning head (23) faces the positioning hole (22); the positioning head (23) is a solid structure, and the lifting seat (3) is also provided with a locking member capable of transversely locking the crossbeam (2).

9. The engraving machine according to claim 7 or 8, characterized in that: The cross section of the guide channel (53) is rectangular, and the outer side surface of the crossbeam (2) is slidably matched with the inner side surface of the guide channel (53).

10. The engraving machine according to claim 8, characterized in that: The locking member comprises two latches (55) which are respectively slidably inserted into the two guide seats (5) in the vertical direction. The upper side surfaces of the two cross beams (2) are both provided with insertion holes (24) in the vertical direction. When the positioning head (23) is inserted into the positioning hole (22), the two latches (55) can be respectively inserted into the insertion holes (24) of the two cross beams (2).

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