engraving and milling machines

Abstract

The present invention provides an engraving and milling machine, belonging to the technical field of engraving equipment. It solves the problem in the prior art that engraving and milling machines have difficulty performing high-precision processing on irregularly shaped workpieces. The engraving and milling machine comprises a frame and a work platform mounted on the frame for placing the workpiece. The frame is also provided with an engraving assembly capable of three-dimensional translation relative to the work platform. The work platform is provided with three or more clamps, each of which is located on one side of the workpiece and can move independently relative to the work platform. Each clamp can be moved away from the workpiece to enable the engraving assembly to process the contact portion of the clamp on the workpiece. The present invention has the advantage of high processing precision for irregularly shaped workpieces.

Description

Technical Field

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

[0002] The engraving and milling machine is a kind of equipment for combined drilling and milling processing. Compared with manual engraving, it has higher processing efficiency and processing accuracy. Therefore, it has been widely used and has even replaced manual engraving technology. The emergence of engraving and milling machines has laid the foundation for the large-scale and rapid production of products.

[0003] When a milling machine processes a workpiece, it involves clamping and positioning the workpiece. The accuracy and stability of the clamping directly affect the accuracy of the processing. At present, for clamping the workpiece, the conventional method is to clamp the workpiece from both ends through a center and a turntable. For example, a Chinese patent document discloses an adjustable eight-head five-axis three-dimensional engraving machine (application number: 201811401521.2; publication number: CN109159595A). The workpiece fixing mechanism of the engraving machine includes a working center and a working clamping part. The working clamping part is provided with a workpiece fixing disk. The center includes movable centers. The number of movable centers is equal to the number of workpiece fixing disks and corresponds one to one on the longitudinal straight line. The engraving machine clamps the workpiece from both ends through a movable center and a workpiece fixing plate. This clamping method can achieve stable clamping for some straight-shaped workpieces with relatively regular shapes. However, for some special-shaped workpieces, the workpiece is in a suspended state due to the lack of support at the bottom. When the special-shaped workpiece is clamped by the movable center and the workpiece fixing plate at both ends, the gravity of the special-shaped workpiece is uneven on both sides of the axis of the movable center and the workpiece fixing plate, and the workpiece is prone to spinning during the processing. Therefore, this clamping method is difficult to stably clamp the special-shaped workpiece, which can easily affect the processing accuracy. At present, when using this clamping method to clamp special-shaped workpieces, in order to ensure the stability of the workpiece clamping, it is usually necessary to set a component to support the workpiece under the workpiece to avoid the phenomenon of the workpiece spinning during the processing. In addition, there is also a way to improve the stability of the clamping of special-shaped workpieces by increasing the clamping area and the clamping force. Summary of the Invention

[0004] The purpose of the present invention is to solve the above problems in the existing technology and propose a milling machine. The present invention solves the problem that the existing milling machine is difficult to perform high-precision processing on special-shaped workpieces.

[0005] The objectives of the present invention can be achieved through the following technical solutions: a carving and milling machine, comprising a frame and a working platform arranged on the frame for placing a workpiece, the frame is also provided with an engraving component that can perform three-dimensional translation relative to the working platform, and is characterized in that three or more clamps are provided on the working platform, any of the clamps are located on one side of the workpiece and can move independently relative to the working platform, and any of the clamps can move in a direction away from the workpiece so that the engraving component can process the contact part of the clamp on the workpiece.

[0006] In this milling machine, each clamp is located on one side of the workpiece. By moving the clamp, it can clamp the workpiece from the side. Compared to the traditional method of clamping the workpiece at both ends with a center and a turntable, this method can prevent the spinning of special-shaped workpieces due to the uneven gravity on both sides of the axial line connecting the center and the turntable. Furthermore, by using three or more clamps, each of which can move independently relative to the work platform, not only can multi-point clamping be achieved for special-shaped workpieces, but the clamping position of each clamp can be adjusted to the specific shape of the workpiece, thereby improving the stability and clamping accuracy of the special-shaped workpiece clamping and ensuring processing accuracy.

[0007] Although the side clamping method ensures the stability of the clamping of special-shaped workpieces, it involves the problem of how to process the contact part of the clamping part on the workpiece. For this reason, this engraving and milling machine adopts a design in which the clamping part can move in the direction away from the workpiece, which can make the contact part of the clamping part on the workpiece leak out, so that the engraving component can process this part. And because any clamping part can independently move in the direction away from the workpiece, the clamping state of different clamping parts can be switched to meet the processing needs of different parts of the workpiece. At the same time, because there are three or more clamping parts, when a clamping part moves away from the workpiece and retreats, relying on the remaining part or all of the clamping parts can also ensure the stable clamping and positioning of the special-shaped workpiece, thereby ensuring the accuracy of the processing of the special-shaped workpiece.

[0008] In the above-mentioned engraving and milling machine, the work platform is provided with two rows of clamps spaced laterally apart, each row containing at least two clamps spaced longitudinally along the work platform. Each clamp is independently movable horizontally and vertically relative to the work platform. With this design, a workpiece can be placed at a predetermined position between the two rows of clamps on the work platform. The workpiece is then clamped initially by the clamps in one row while the clamps in the other row remain in a standby state. Because each clamp is independently movable horizontally and vertically relative to the work platform, when clamping a shaped workpiece, if the bottom surface of the shaped workpiece is uneven, the height of each clamp can be adjusted by the vertical movement of each clamp, thereby adapting to the uneven bottom surface of the shaped workpiece and clamping at different heights, ensuring that each clamp contacts the bottom surface of the workpiece. Furthermore, if the shaped workpiece also has uneven sides, the horizontal position of each clamp can be adjusted by the horizontal movement of each clamp, thereby adapting to the uneven side surface and clamping at different lateral positions. Therefore, this engraving and milling machine can achieve stable clamping of special-shaped workpieces and ensure processing accuracy through the lateral horizontal movement and up and down movement of each clamping piece. When this engraving and milling machine adopts the design of double-row clamping pieces, it is mainly used for processing the two end faces and left and right sides of the workpiece. During the first clamping process, the two ends of the workpiece and the sides facing the other row of clamping pieces can be processed; after processing, the workpiece can be transferred to another row of clamping pieces by relying on the horizontal lateral movement of each clamping piece, and the workpiece can be clamped for the second time using the other row of clamping pieces. The clamping pieces of the first clamping are loosened and returned. At this time, the contact part of the clamping piece that could not be processed during the first clamping of the workpiece leaks out, thereby achieving processing of the other side of the workpiece. During the second clamping process, since each clamping piece can also move horizontally and up and down independently relative to the work platform, it can also stably clamp the workpiece and ensure processing accuracy. The above-mentioned transfer processing method can avoid the problem of the clamping state being affected by the need to loosen the clamping pieces in turn during the processing process, thereby making the processing more accurate. Of course, for some workpieces with a certain width that also need to be processed on the top surface, since the double clamping process can also reveal the top surfaces of the left and right sides of the workpiece, this can also be achieved when necessary. If the workpiece bottom surface needs to be processed, in actual operation, the workpiece can be transported to the next process by the feed roller, and then turned over by the turning mechanism, or manually turned over, to achieve the processing of the workpiece bottom surface.

[0009] In the above-mentioned engraving and milling machine, there are three clamps on the work platform, and the three clamps are arranged in sequence along the longitudinal direction of the work platform. Each clamp can independently move horizontally and up and down relative to the work platform. This structure adopts a single-sided clamping method to position the workpiece, which is mainly used for processing special-shaped workpieces with smaller widths. During processing, the workpiece is placed at a preset position on the work platform, and then the workpiece is clamped first by relying on the movement of the three clamps. Similarly, since each clamp can independently move horizontally and up and down relative to the work platform, the stability of the clamping of the special-shaped workpiece can be met, thereby ensuring the processing accuracy. During the processing process, by retracting one clamp away from the workpiece each time, and then relying on the other two clamps to clamp the workpiece after retraction, the contact parts of the clamps acting on the workpiece can be leaked in sequence, thereby realizing the processing of different parts of the workpiece.

[0010] In the aforementioned engraving and milling machine, the clamping member includes a driving source (1), a pressing member, and a supporting member. The supporting member is connected to a vertically arranged connecting arm. The pressing member is fixedly connected to the connecting arm and is arranged vertically opposite to the supporting member. The driving source (1) can drive the connecting arm to move up and down relative to the supporting member. Through this design, the vertical movement stroke of the connecting arm can be controlled by controlling the driving source (1). In this way, the distance between the pressing member and the supporting member when clamping the workpiece can be adjusted to accommodate the varying thicknesses of the workpiece at different locations. This ensures more stable workpiece clamping and reduces the risk of over-loosening or over-tightening, thereby ensuring the machining accuracy of the engraving and milling machine.

[0011] In the above-mentioned engraving and milling machine, the pressing member and the supporting member are both block-shaped, with the bottom surface of the pressing member and the top surface of the supporting member facing each other vertically and both being horizontal planes. After the workpiece is clamped by the clamping member, the workpiece is supported by the supporting member of the clamping member. Therefore, setting the top surface of the supporting member as a plane facilitates stable support of the workpiece, while the bottom surface of the pressing member is a plane, which also facilitates stable pressing of the workpiece against the supporting member, thereby improving the stability of the clamping, thereby ensuring the clamping accuracy and achieving high processing precision of the engraving and milling machine.

[0012] In the above-mentioned engraving and milling machine, a plurality of feed rollers are arranged in a longitudinal order on the work platform. The length direction of each feed roller is arranged horizontally along the work platform and the feed rollers are arranged at the same height. The clamping member is arranged in the gap between the two adjacent feed rollers. After the clamping member moves downward, the top surface of its supporting component can be lower than or flush with the upper edge of the feed roller. The two ends of the feed roller are respectively connected to the frame so that the feed roller can rotate circumferentially. Among the feed rollers, some of the feed rollers can be actively rotated to drive the workpiece forward. Of course, all feed rollers can also be actively rotated. By setting the feed rollers, automatic feeding is achieved, the degree of automation of the processing is improved, and manual labor is reduced. The clamping member is arranged in the gap between the two adjacent feed rollers to avoid interference and ensure that the clamping member can smoothly translate laterally and move up and down. When the clamp moves downward, the top surface of its supporting component can be lower than or flush with the upper edge of the feed roller, so that when the workpiece is supported by the feed roller, the supporting component of the clamp can extend to the bottom of the workpiece, thereby smoothly clamping the workpiece.

[0013] In the aforementioned engraving and milling machine, a front backrest is provided on the front side of the work platform to limit the travel of the workpiece on the feed rollers. A support frame is provided on one longitudinal side of the work platform. The support frame is provided with a plurality of side backrests arranged longitudinally along the work platform, with adjacent side backrests forming a gap to avoid the clamping member. Each side backrest is connected to a second drive source for driving its lateral horizontal movement. As the workpiece is conveyed forward on the feed rollers, when the workpiece abuts the front backrest, the longitudinal position of the workpiece is limited. The lateral movement of the side backrests pushes the workpiece against the connecting arm of the clamping member on the other side, thereby limiting the lateral position of the workpiece. The travel of each side backrest driven by the second drive source can be pre-set based on the shape of the workpiece, and the initial position of each clamping member can be pre-set. In this way, each workpiece conveyed by the feed rollers can be accurately positioned at a preset clamping position, thereby facilitating the clamping member to stably clamp the workpiece at the preset clamping position.

[0014] In the aforementioned engraving and milling machine, a front backrest is provided on the front side of the work platform to limit the travel of the workpiece on the feed rollers. Support frames are provided on both longitudinal sides of the work platform, each of which is equipped with a plurality of side backrests arranged longitudinally along the work platform, with adjacent side backrests forming a gap to avoid clamping parts. Each side backrest is connected to a second drive source for driving its lateral horizontal movement. As the workpiece is conveyed forward on the feed rollers, when it abuts the front backrest, the longitudinal position of the workpiece is limited. The lateral movement of the side backrests on one of the support frames pushes the workpiece against the side backrests on the other support frame, thereby limiting the lateral position of the workpiece. The travel of each side backrest driven by the second drive source can be preset based on the shape of the workpiece, and the initial position of the side backrests against which the workpiece abuts can also be preset. Typically, to simplify program setup, the side backrests against which the workpiece abuts are preferably arranged in a straight line. Through the above method, each workpiece delivered by the feed roller can be accurately positioned at the preset clamping position, making it easier for the clamp to stably clamp the workpiece at the set clamping position. In addition, for special-shaped workpieces with curved sides, this structure can increase the lateral positioning accuracy of the special-shaped workpiece and improve processing accuracy because the side support has more support points than the connecting arm of the clamp.

[0015] In the aforementioned engraving and milling machine, the work platform is further provided with a third drive source capable of driving the front backrest up and down, and the front backrest can be raised or lowered by the raising and lowering of the front backrest. The third drive source is preferably a pneumatic cylinder, but a hydraulic cylinder, a motor-screw mechanism, a rack-and-pinion mechanism, a belt drive, or the like can also be used to drive the front backrest up and down. When the front backrest is raised, it can abut against the workpiece, thereby defining its longitudinal position. When the front backrest is lowered, the workpiece can continue to be moved forward.

[0016] In the above-mentioned engraving and milling machine, the work platform includes a plurality of clamping member mounting seats arranged in a longitudinal direction and spaced apart, and each clamping member mounting seat is located below the feed roller. Each clamping member mounting seat is slidably provided with two transverse slides, each of which is connected to a drive source 4 for driving its transverse horizontal movement. Each transverse slide is provided with a vertical slide and a drive source 5 capable of driving the vertical slide up and down, and each vertical slide is connected to one of the above-mentioned clamping members. The drive source 4 is preferably a motor, which drives the transverse slide to move via a screw-nut mechanism, thereby achieving transverse horizontal movement of the clamping member. By controlling the number of rotations of the motor, the distance of the transverse horizontal movement of the clamping member can be controlled. Of course, the transverse slide can also be driven by a cylinder, a hydraulic cylinder, a gear rack mechanism, a belt drive, etc. When a cylinder or a hydraulic cylinder is used, the piston rod of the cylinder or hydraulic cylinder is connected to the transverse slide and drives the transverse slide to move. The stroke of the cylinder or hydraulic cylinder can be pre-set according to the shape of the different workpieces, thereby controlling the distance of the transverse horizontal movement of the clamping member. When the driving source five drives the vertical slide to move up and down, the clamping height of the clamped piece can be adjusted. The driving source five is preferably a motor. Similarly, the vertical slide can also be driven to move by a cylinder, a hydraulic cylinder, a gear rack mechanism, a belt drive, etc.

[0017] In the aforementioned engraving and milling machine, the connecting arm of the clamping member is a vertically mounted slide rail. The clamping member's support component is fixedly connected to a vertical slide. A guide block is also fixedly attached to the vertical slide, which slidably engages the connecting arm. This design allows the slide rail to move up and down guided by the guide block, resulting in high precision and stability in the rail's movement, and thus high precision and stable clamping of the clamping member.

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

[0019] 1. Each clamping part in this engraving and milling machine can move horizontally and vertically independently relative to the work platform. In this way, when processing special-shaped workpieces, not only can multi-point clamping of special-shaped workpieces be achieved, but the clamping position of each clamping part can also be adjusted according to the specific shape of the workpiece, thereby improving the stability and clamping accuracy of the clamping positioning of the special-shaped workpiece, making this engraving and milling machine have the advantage of high processing accuracy when processing special-shaped workpieces.

[0020] 2. This engraving and milling machine is equipped with two rows of clamps, and each row of clamps can achieve stable clamping of the workpiece. The workpiece can be transferred and processed between the two rows of clamps. This method can avoid the problem of the clamping state being affected by the need to loosen the clamps in turn and leak out of the clamping surface in turn during the processing process, thereby achieving higher processing precision.

[0021] 3. This engraving and milling machine is equipped with a front backrest and a side backrest that can be moved laterally on the working platform, so that each workpiece delivered by the feed roller can be accurately positioned at the preset clamping position, making it convenient for the clamp to stably clamp the workpiece at the set clamping position. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0023] Figure 2 It is a schematic diagram of the three-dimensional structure of the engraving and milling machine in Example 1 without the frame.

[0024] Figure 3 yes Figure 2 Schematic diagram of the three-dimensional structure after hiding the support frame, driving source 2 and side support.

[0025] Figure 4 yes Figure 3 Schematic diagram of the three-dimensional structure after hiding the feed roller.

[0026] Figure 5 This is a schematic diagram of the material clamping parts and their installation structure in the first embodiment of the engraving and milling machine.

[0027] Figure 6 yes Figure 5 Top view of .

[0028] Figure 7 yes Figure 4 Schematic diagram of the three-dimensional structure behind the hidden clamping parts and vertical slide.

[0029] Figure 8 This is a schematic diagram of the connection between the drive source 4 and the clamping piece mounting seat in the first embodiment of the engraving and milling machine.

[0030] Figure 9 This is a brief description of the working principle of the first embodiment of the engraving and milling machine. Figure 1 .

[0031] Figure 10 This is a brief description of the working principle of the first embodiment of the engraving and milling machine. Figure 2 .

[0032] Figure 11 This is a brief description of the working principle of the first embodiment of the engraving and milling machine. Figure 3 .

[0033] Figure 12 This is a brief description of the working principle of the first embodiment of the engraving and milling machine. Figure 4 .

[0034] Figure 13 It is a schematic diagram of the three-dimensional structure of the engraving and milling machine in the fifth embodiment without the frame.

[0035] Figure 14This is a schematic diagram of the clamping parts and their installation structure in the sixth embodiment of the engraving and milling machine.

[0036] Figure 15 It is a schematic diagram of the three-dimensional structure of the engraving and milling machine in the second embodiment without the frame.

[0037] In the figure, 1. frame; 1a. gantry; 1b. base; 2. working platform; 21. clamping part mounting seat; 3. engraving assembly; 4. clamping part; 41. driving source one; 42. pressing part; 43. supporting part; 44. connecting arm; 5. front backrest; 6. supporting frame; 7. side backrest; 8. driving source two; 10. feeding roller; 11. horizontal slide; 12. vertical slide; 13. driving source four; 14. driving source five; 15. guide block; 16. screw rod; 17. nut; 18. connecting block. DETAILED DESCRIPTION

[0038] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solutions of the present invention, but the present invention is not limited to these embodiments.

[0039] Example 1

[0040] like Figure 1 As shown, the engraving and milling machine comprises a frame 1 including a base 1b, on which is disposed a work platform 2 for placing a workpiece. The base 1b is also provided with a longitudinally sliding gantry 1a, on which is disposed an engraving assembly 3. The engraving assembly 3 can also move laterally and vertically relative to the gantry 1a, allowing the engraving assembly 3 to perform three-dimensional translation relative to the work platform 2. Alternatively, the gantry 1a can be fixed relative to the base 1b, while the work platform 2 can move longitudinally on the base 1b.

[0041] like Figure 2As shown, two rows of clamps 4 are arranged laterally on the work platform 2, capable of clamping the workpiece from the side. Each row contains three clamps 4, which are spaced apart longitudinally along the work platform 2. The clamps 4 in the two rows are arranged opposite each other transversely along the work platform 2, forming a passage for the workpiece to be placed between the two rows of clamps 4. During machining, each clamp 4 is located on one side of the workpiece, and each clamp 4 can independently move horizontally and vertically relative to the work platform 2. Furthermore, each clamp 4 can be moved away from the workpiece to allow the engraving assembly 3 to process the contact portion of the clamp 4 on the workpiece. With this design, when clamping a special-shaped workpiece, if the bottom surface of the special-shaped workpiece is uneven, the height of each clamping member 4 can be adjusted by moving each clamping member 4 up and down, thereby adapting to the uneven bottom surface of the special-shaped workpiece and clamping at different heights, so that each clamping member 4 can contact the bottom surface of the workpiece; at the same time, if the special-shaped workpiece also has uneven sides, the horizontal and lateral positions of each clamping member 4 can be adjusted by moving each clamping member 4 horizontally, thereby adapting to the uneven side of the workpiece and clamping at different lateral positions. Therefore, through the horizontal and vertical movement of each clamping member 4, this engraving and milling machine can achieve stable clamping of special-shaped workpieces and ensure processing accuracy.

[0042] like Figure 3 As shown, a plurality of feed rollers 10 are arranged in a longitudinal order and spaced apart on the working platform 2. The working platform 2 includes three clamping member mounting seats 21 arranged in a longitudinal order and spaced apart, and each clamping member mounting seat 21 is located below the feed roller 10. The two ends of the feed roller 10 are respectively connected to the frame 1 so that the feed roller 10 can rotate in the circumferential direction. The length direction of each feed roller 10 is arranged horizontally along the working platform 2 and the feed rollers 10 are arranged at the same height. The clamping member 4 is arranged in the interval between two adjacent feed rollers 10. After the clamping member 4 moves downward, the top surface of its supporting member 43 can be lower than or flush with the upper edge of the feed roller 10. In this way, when the workpiece is supported by the feed roller 10, the supporting member 43 of the clamping member 4 can extend to the lower part of the workpiece, thereby achieving the workpiece clamping. Among the feed rollers 10, some of the feed rollers 10 can be able to actively rotate to drive the workpiece forward, and of course, all the feed rollers 10 can also be able to actively rotate. After the feeding roller 10 is provided, automatic feeding is realized, the degree of automation of processing is improved, and manual labor is reduced.

[0043] like Figure 2As shown, the front side of the work platform 2 is provided with a front backrest 5 that can limit the conveying stroke of the workpiece on the feed roller 10. The work platform 2 is also provided with a driving source 3 that can drive the front backrest 5 to move up and down. The driving source 3 is not shown in the figure, and the front backrest 5 can be raised or lowered above or below the upper edge of the feed roller 10 by raising and lowering the front backrest 5. The driving source 3 is preferably a cylinder. Of course, a hydraulic cylinder, a motor screw mechanism, a gear rack mechanism, a belt drive, etc. can also be used to drive the front backrest to move up and down. Support frames 6 are provided on both longitudinal sides of the work platform 2. Each support frame 6 is provided with a number of side backrests 7 arranged longitudinally along the work platform 2. A gap is formed between the adjacent side backrests 7 to avoid the clamping piece 4. Each side backrest 7 is connected to a driving source 2 8 that drives it to move horizontally. The workpiece is conveyed forward on the feed roller 10. When the workpiece abuts against the front backrest 5, the longitudinal position of the workpiece can be limited. By the lateral horizontal movement of the side backrest 7 on one of the support frames 6, the workpiece can be pushed to abut against the side backrest 7 on the other support frame 6, thereby achieving the limitation of the lateral position of the workpiece.

[0044] like Figure 4 and Figure 5 As shown, the material clamping member 4 includes a driving source 1 41, a pressing member 42, and a supporting member 43. The pressing member 42 and the supporting member 43 are both block-shaped. A vertically arranged connecting arm 44 is connected to the supporting member 43. The pressing member 42 is fixedly connected to the connecting arm 44 and is arranged vertically opposite to the supporting member 43. The bottom surface of the pressing member 42 and the top surface of the supporting member 43 are vertically opposite and both are horizontal planes. The driving source 1 41 can drive the connecting arm 44 to move up and down relative to the supporting member 43. Specifically, the connecting arm 44 of the material clamping member 4 is a vertically arranged slide rail. The supporting member 43 of the material clamping member 4 is fixedly connected to the vertical slide 12. The vertical slide 12 is also fixedly connected to a guide block 15 that slides with the slide rail. After the workpiece is clamped by the clamping member 4, the workpiece is supported by the support member 43. Therefore, setting the top surface of the support member 43 as a plane is conducive to stably supporting the workpiece, and the bottom surface of the pressing member 42 is a plane, which is also conducive to stably pressing the workpiece on the support member 43, that is, improving the stability of the clamping, thereby ensuring the accuracy of the clamping, and making the engraving and milling machine have high processing accuracy. Moreover, by controlling the driving source 41 to control the up and down movement of the connecting arm 44, it is also possible to adjust the distance between the pressing member 42 and the support member 43 when clamping the workpiece in response to different thicknesses at different positions of the special-shaped workpiece, so that the workpiece clamping is more stable and less likely to be clamped too loosely or too tightly. Figure 5 As shown, the driving source 1 41 adopts a cylinder, and the piston rod of the cylinder extends upward to connect with the connecting arm 44. Of course, the connecting arm 44 can also be driven to move by a hydraulic cylinder, a motor screw mechanism, a gear rack mechanism, a belt drive, etc.

[0045] Combine Figure 6 、 Figure 7 and Figure 8 As shown, two transverse slides 11 are slidably provided on each clamping member mounting seat 21, and each transverse slide 11 is respectively connected to a driving source 13 for driving its transverse horizontal movement. Specifically, as shown in FIG. Figure 8 As shown, the drive source 4 13 is a motor, the output shaft of which is connected to a screw 16, and a nut 17 is connected to the horizontal slide 11. When the drive source 4 13 rotates, it can drive the nut 17 and the horizontal slide 11 to move back and forth horizontally along the work platform 2. Each horizontal slide 11 is respectively provided with a vertical slide 12 and a drive source 5 14 that can drive the vertical slide 12 to move up and down. Each vertical slide 12 is respectively connected to a clamp 4. Figure 7 As shown, the driving source 5 14 is a motor, and a connecting block 18 is fixedly connected to the vertical slide 12. The output shaft of the motor is threadedly connected to the connecting block 18 through a screw.

[0046] Combined with the following Figures 9 to 12 Briefly explain the working principle of this engraving and milling machine, including Figure 9 and Figure 10 This is one of the ways to use this engraving and milling machine. Figure 11 and Figure 12 This is another way to use this engraving and milling machine. Figures 9 to 12 Among them, the representative workpiece has an arc-shaped notch on the middle edge.

[0047] use Figure 9 and Figure 10 When using the method shown, the engraving and milling machine is mainly used to process the left and right sides and two end faces of the workpiece. Of course, it can also process the top surface of the workpiece. Figure 1 The engraving assembly for processing the top surface of the workpiece is mainly shown in FIG. The engraving assembly for processing the side surface is a prior art and is not specifically shown. Figure 2 、 Figure 9 and Figure 10 When the engraving and milling machine is working, the workpiece is transported forward by the action of the feed roller 10. When the workpiece abuts against the front backrest 5, the workpiece cannot move forward any further and its longitudinal position is limited. At this time, the side backrest 7 on one of the support frames 6 is controlled to move horizontally, and the workpiece is pushed to abut against the side backrest 7 on the other support frame 6, so that the lateral position of the workpiece is limited. At this time, the workpiece is accurately positioned at the preset clamping position.

[0048] Afterwards, if Figure 9 As shown, the clamping members 4 in one row close to the workpiece start working to clamp and position the workpiece, while the clamping members 4 in the other row are in a standby state. After the clamping is stable, the engraving assembly 3 starts to process the two end faces and one of the side faces of the workpiece. At this time, since one of the side faces of the workpiece is Figure 9The three clamping parts 4 on the left are blocked, and the blocked parts have not been processed yet. Figure 10 As shown, the workpiece is transferred to the right clamping piece 4 by relying on the horizontal lateral movement of each clamping piece 4 on the left, and the workpiece is clamped for the second time by using the clamping piece 4 on the right, while the clamping pieces 4 for the first time are loosened and returned. At this time, the side of the workpiece cannot be processed during the first clamping, and leaks out, thereby completing the processing of the two side surfaces and two end faces of the workpiece. In addition, for some workpieces with a certain width and the top surface also needing to be processed, since the two clamping processes can also leak out the top surfaces of the left and right sides of the workpiece respectively, the processing of the top surface of the workpiece can also be achieved when necessary. If the bottom surface of the workpiece needs to be processed, in the actual operation process, the workpiece can be transported to the next process by relying on the turning mechanism to turn the workpiece, or it can be turned over manually to achieve the processing of the bottom surface of the workpiece.

[0049] In addition, this engraving and milling machine can also adopt another processing method by changing the control program: Figure 11 As shown, among the six clamping members 4, the two groups of clamping members 4 at the front end first clamp the workpiece, and at this time the group of clamping members 4 at the rear end does not block the top surface of the workpiece, so that the top surface can be processed. Figure 12 As shown, the rear set of clamping members 4 is switched to the clamping state, while the middle set of clamping members 4 is retracted, so that the unprocessed top surface of the middle part of the workpiece can be exposed. Similarly, the frontmost set of clamping members 4 is finally selected to be retracted, and the processing of the entire top surface of the workpiece can be completed. Figure 11 and Figure 12 The number of the clamping pieces 4 returned each time is two. However, in actual processing, the number of the clamping pieces 4 returned each time may also be variable, such as one or three. Figure 11 and Figure 12 The processing method shown is mainly used for processing the top surface of the workpiece. If the bottom surface of the workpiece is also required to be processed, in actual operation, the workpiece can be transported to the next process by the feed roller 10 and turned over by the turning mechanism, or manually turned over to achieve the processing of the bottom surface of the workpiece.

[0050] Example 2

[0051] The structure and principle of this embodiment are basically the same as those of the first embodiment, except that the number and arrangement of the clamping members 4 are different. Figure 15As shown, there are three clamps 4 on the work platform 2. The three clamps 4 are spaced apart in sequence along the longitudinal direction of the work platform, and each clamp 4 can independently move horizontally and up and down relative to the work platform 2. This structure is mainly used for processing special-shaped workpieces with smaller widths. During processing, the workpiece is positioned at a preset position on the work platform 2 by relying on the side backrest 7 and the front backrest 5, and then the workpiece is clamped first by relying on the movement of the three clamps 4. During the processing, by retracting one clamp 4 away from the workpiece each time, and then relying on the other two clamps 4 to clamp the workpiece after retraction, the top surface of the contact portion of the clamp 4 acting on the workpiece can be leaked out in sequence, thereby realizing the processing of the entire top surface of the workpiece. At the same time, the clamping process also facilitates the processing of one of the side faces and two end faces of the workpiece, and has a higher processing accuracy for special-shaped workpieces.

[0052] Example 3

[0053] The structure and principle of this embodiment are basically the same as those of the first embodiment, except that four clamping members 4 are provided on the engraving platform, and the four clamping members 4 are arranged in two rows along the horizontal direction of the working platform 2 .

[0054] Example 4

[0055] The structure and principle of this embodiment are basically the same as those of the first embodiment, except that seven clamping members 4 are provided on the engraving platform. The seven clamping members 4 are arranged in two rows horizontally along the working platform 2, with four in one row and three in the other row. Of course, the number of clamping members 4 can be increased or decreased as needed, and this article will not provide a cumbersome example.

[0056] Example 5

[0057] The structure and principle of this embodiment are basically the same as those of the first embodiment, except that: Figure 13 As shown, the work platform 2 is provided with a support frame 6 at only one longitudinal side. The support frame 6 is provided with a number of side supports 7 arranged longitudinally along the work platform 2. Adjacent side supports 7 form a gap between each other to avoid the material clamping member 4. Each side support 7 is connected to a drive source 8 for its lateral horizontal movement. The workpiece is conveyed forward on feed rollers 10. When the workpiece abuts the front support 5, the longitudinal position of the workpiece is defined. The lateral movement of the side supports 7 pushes the workpiece against the connecting arm 44 of the material clamping member 4 on the other side, thereby defining the lateral position of the workpiece.

[0058] Example 6

[0059] The structure and principle of this embodiment are basically the same as those of the first embodiment, except that: Figure 14As shown, the driving source 13 is a cylinder or a hydraulic cylinder, and the piston rod of the cylinder or the hydraulic cylinder is horizontally arranged and fixedly connected to the transverse slide 11.

[0060] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope of the appended claims.

[0061] Although this article frequently uses terms such as 1, frame; 1a, gantry; 1b, base; 2, working platform; 21, clamping member mounting seat; 3, engraving assembly; 4, clamping member; 41, driving source 1; 42, pressing member; 43, supporting member; 44, connecting arm; 5, front backrest; 6, supporting frame; 7, side backrest; 8, driving source 2; 10, feeding roller; 11, horizontal slide; 12, vertical slide; 13, driving source 4; 14, driving source 5; 15, guide block; 16, screw rod; 17, nut, etc., it does not exclude the possibility of using other terms. These terms are used only to more conveniently describe and explain the essence of the present invention; interpreting them as any additional limitations is contrary to the spirit of the present invention.

Claims

1. A milling machine, comprising a frame (1) and a working platform (2) arranged on the frame (1) for placing a workpiece, wherein the frame (1) is further provided with an engraving component (3) capable of three-dimensional translation relative to the working platform (2), characterized in that: The working platform (2) is provided with three or more clamping members (4), any of which is located on one side of the workpiece and can be moved independently relative to the working platform (2), and any of which can be moved in a direction away from the workpiece so that the engraving assembly (3) can process the contact portion of the clamping member (4) on the workpiece; a support frame (6) is provided at one or both longitudinal sides of the working platform (2), and the support frame (6) is provided with a plurality of side supports (7) arranged longitudinally along the working platform (2), and a gap is formed between adjacent side supports (7) to avoid the clamping members (4), and each side support (7) is connected to a driving source (8) for driving its horizontal movement.

2. The engraving and milling machine according to claim 1, characterized in that: Two rows of the clamping members (4) are arranged at intervals along the horizontal direction on the working platform (2), and the number of the clamping members (4) in each row is at least two and they are arranged at intervals along the longitudinal direction of the working platform (2). Each clamping member (4) can independently move horizontally and vertically relative to the working platform (2).

3. The engraving and milling machine according to claim 1, characterized in that: There are three clamping pieces (4) on the working platform (2), and the three clamping pieces (4) are arranged in sequence and spaced apart along the longitudinal direction of the working platform. Each clamping piece (4) can independently move horizontally and vertically relative to the working platform (2).

4. The engraving and milling machine according to claim 1 or 2, characterized in that: The clamping member (4) comprises a driving source (41), a pressing member (42) and a supporting member (43); the supporting member (43) is connected to a vertically arranged connecting arm (44); the pressing member (42) is fixedly connected to the connecting arm (44) and is located above the supporting member (43); the driving source (41) can drive the connecting arm (44) to move up and down relative to the supporting member (43).

5. The engraving and milling machine according to claim 4, characterized in that: The pressing component (42) and the supporting component (43) are both block-shaped, and the bottom surface of the pressing component (42) and the top surface of the supporting component (43) are opposite to each other and are both horizontal planes.

6. The engraving and milling machine according to claim 4, characterized in that: A plurality of feed rollers (10) are arranged in a longitudinally spaced order on the working platform (2), the length direction of each feed roller (10) is arranged transversely along the working platform (2), and the feed rollers (10) are arranged at the same height. The clamping member (4) is arranged in the interval between two adjacent feed rollers (10), and when the clamping member (4) moves downward, the top surface of its supporting part (43) can be lower than or flush with the upper edge of the feed roller (10).

7. The engraving and milling machine according to claim 6, characterized in that: The front side of the working platform (2) is provided with a front backrest (5) capable of limiting the conveying stroke of the workpiece on the feeding roller (10).

8. The engraving and milling machine according to claim 7, characterized in that: The working platform (2) is also provided with a driving source 3 capable of driving the front backrest (5) to move up and down, and the front backrest (5) can be moved above or below the upper edge of the feeding roller (10) by the lifting of the front backrest (5).

9. The engraving and milling machine according to claim 2, characterized in that: The working platform (2) includes a plurality of clamping piece mounting seats (21) arranged in sequence along the longitudinal direction and each clamping piece mounting seat (21) is located below the feeding roller (10), and two transverse slides (11) are slidably provided on each clamping piece mounting seat (21), and each transverse slide (11) is respectively connected to a driving source four (13) for driving its transverse horizontal movement, and each transverse slide (11) is respectively provided with a vertical slide (12) and a driving source five (14) capable of driving the vertical slide (12) to move up and down, and each vertical slide (12) is respectively connected to one of the clamping pieces (4).

10. The engraving and milling machine according to claim 9, characterized in that: The connecting arm (44) of the clamping member (4) is a vertically arranged slide rail, the supporting component (43) of the clamping member (4) is fixedly connected to the vertical slide seat (12), and the vertical slide seat (12) is also fixedly connected to a guide block (15) that slides with the connecting arm (44).

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