A three-dimensional engraving machine

Abstract

The present invention provides a three-dimensional engraving machine, which belongs to the field of mechanical technology. It solves the problem of how to improve the processing efficiency of existing three-dimensional engraving machines. The present invention includes a base and a gantry beam connected to the base and capable of horizontal and longitudinal movement. A support platform is provided on the base below the gantry beam, and a tool holder in a long strip shape with a plurality of tool heads is provided on the gantry beam. A translation structure is provided between the tool holder and the gantry beam to enable the tool holder to form a three-dimensional translation relative to the support platform. The tool holder can swing with the strip direction of the tool holder as the axis. A long strip workbench is provided on the support platform. The workbench is arranged parallel to the tool holder and can swing with the strip direction of the workbench as the axis. A plurality of positioning mechanisms for positioning the workpiece are provided on the upper side of the workbench. The three-dimensional engraving machine forms a double swing structure, which improves the processing efficiency.

Description

Technical Field

[0001] The invention belongs to the field of mechanical technology and relates to a three-dimensional engraving machine capable of processing multiple cutter heads simultaneously, in particular to a three-dimensional engraving machine with multiple cutter heads and six axes. Background Art

[0002] There are many types of three-dimensional engraving machines, such as engraving machines, engraving and milling machines, etc. However, as the workpieces become more and more complex, various suitable three-dimensional engraving machines have also appeared one after another for the engraving processing of some complex-shaped workpieces.

[0003] For example, the Chinese patent application No. 201610157664.8 discloses a multi-head five-axis plane swing head engraving machine, which includes a base, columns respectively arranged on both sides of the base, a plane workbench and a tool mechanism, the tool mechanism includes a tool holder, a tool spindle, a tool drive mechanism, a tool holder drive mechanism, a left side plate, a right side plate, a tool holder crossbeam and a middle crossbeam, the middle crossbeam is fixed to the columns on both sides, a tool holder sliding mechanism is provided on the middle crossbeam, the left side plate and the right side plate are respectively fixed to the slider of the tool holder sliding mechanism through hanging plates, one end of the tool holder crossbeam is fixed to the upper inner side of the left side plate, and the other end is fixed to the upper inner side of the right side plate; one or more sets of tool spindles and tool drive mechanisms can be arranged in the tool holder. The tool spindles and tool drive mechanisms are the same in number and correspond one to one. Each tool drive mechanism drives the corresponding tool spindle. The tool spindle is installed in the tool holder through a reducer I. The motor I is placed horizontally and longitudinally in the tool holder. The reducer I and the motor I are connected by a first synchronous belt. The tool spindle can swing left and right in the tool holder, with a maximum swing angle of 45° to the left and a maximum swing angle of 45° to the right. The tool holder drive mechanism includes a reducer II and a motor II. The motor II and the reducer II are connected by a second synchronous belt. The motor II drives the entire tool holder to swing forward and backward, with a maximum swing angle of 90° forward and a maximum swing angle of 90° backward.

[0004] When this type of engraving machine processes workpieces of complex shapes, although there are multiple tool spindles on the tool holder, in the actual processing process, one tool head is still processing one workpiece, which makes the processing very difficult. Secondly, the spatial swing angle formed by the forward and backward swing of the tool holder and the left and right swing of the tool spindle set on the tool holder is limited. It can only move to a certain point in the space and cannot form arc processing during processing. It cannot adapt well to workpieces of complex shapes.

[0005] The common approach to solving this problem is to process complex-shaped workpieces in steps on different machine models using multiple different tool heads, but this will result in low processing efficiency. Alternatively, the swing angle of the tool holder and the swing angle of the tool spindle are increased to increase the applicable range, but this approach only expands the spatial range reached by the tool head, making it difficult to perform arc processing. Summary of the invention

[0006] In view of the above problems existing in the prior art, the present invention proposes a three-dimensional engraving machine. The technical problem to be solved by the present invention is how to improve the processing efficiency of the three-dimensional engraving machine.

[0007] The present invention is realized through the following technical scheme: a three-dimensional engraving machine, comprising a base and a gantry beam connected to the base and capable of horizontal and longitudinal movement, a support platform is provided on the base below the gantry beam, and is characterized in that a tool holder in the shape of an elongated strip and having a plurality of tool heads is provided on the gantry beam, a translation structure is provided between the tool holder and the gantry beam so that the tool holder forms a three-dimensional translation relative to the support platform, the tool holder can swing with the strip direction of the tool holder as the axis, a workbench in the shape of an elongated strip is provided on the support platform, the workbench is arranged parallel to the tool holder and the workbench can swing with the strip direction of the workbench as the axis, and a plurality of positioning mechanisms for positioning the workpiece are provided on the upper side of the workbench.

[0008] The tool holder in this three-dimensional engraving machine can form a three-dimensional translation relative to the support table. Since the tool holder is set on the horizontal longitudinally movable gantry beam, the tool holder can translate vertically up and down relative to the gantry beam, and the support table translates horizontally left and right. On the basis of three axes, the tool holder is made to be able to swing back and forth with the strip direction as the axis, so that the cutter head can swing back and forth with the tool holder, and the workbench is also made to swing back and forth with the strip direction of the workbench as the axis, and the positioning mechanism is also rotated and connected to the workbench, so that the workpiece can swing back and forth after being positioned on the positioning mechanism. Through this structure, the swing of the tool holder and the swing of the workbench form a double swing structure. This double swing structure is divided into upper and lower parts, and the tool holder and the workbench form a relative swing, so that the cutter head can have a larger processing angle and swing precision for the workpiece, eliminating the problem of processing dead angles, and can be applied to workpieces of various complex shapes, improving processing efficiency, overcoming the conventional practice that different engraving machines are required for processing when processing a general single swinging tool head, and can be applied to the processing of wood, stone, metal, plastic, etc.

[0009] The swing here means that it can rotate in both directions, and the rotation is usually performed once in one direction at an angle less than 360 degrees. The tool holder can rotate 360 ​​degrees, but in actual use it can be rotated in a swinging manner.

[0010] In the above-mentioned three-dimensional engraving machine, several of the tool heads are arranged at intervals on the tool holder, and adjacent tool heads have at least two different orientations. Tool heads with different orientations form a tool head group, which is used to engrave the same workpiece. There are several groups of these engraving tool groups and they are arranged in sequence on the tool holder. The number of engraving tool groups is generally determined according to the number of positioning mechanisms. Tool heads with different orientations can select the required tool heads by swinging the tool holder, and tool change and engraving can be performed, which improves efficiency. And tool heads with different orientations can be selected in four directions: up, down, front and back. In this way, only one tool head can be used for engraving, and the other three will not interfere with the movement and swing of the workpiece. In conjunction with the swing of the workbench, the swing angle of the workpiece can be increased, thereby increasing the scope of application of a single tool head and improving processing efficiency.

[0011] In the above-mentioned three-dimensional engraving machine, the positioning mechanism can rotate relative to the workbench, and there are two ways: one is to provide a plurality of rotatable turntables on the workbench, and the positioning mechanism is arranged on the turntables; the other is to provide a plurality of rotatable output shafts on the workbench, and the positioning mechanism is arranged on the output shaft, and the output shaft can be a rotating shaft rotatably connected to the workbench, or an output shaft of a motor or an output shaft of a reducer. The positioning mechanism here can be in a variety of ways, such as clamping, pressing, air adsorption, or glue bonding.

[0012] The positioning mechanism can rotate to make the three-dimensional engraving machine a six-axis engraving machine with multiple tool heads, and arranging the positioning mechanism to rotate on the basis of the double swing structure can better achieve the stability and processing accuracy of the six-axis engraving machine.

[0013] In the above-mentioned three-dimensional engraving machine, the support table is provided with two support seats, the workbench is arranged between the two support seats and the two ends of the workbench are swingably connected to the support seats, and a motor 1 for driving the workbench to swing is arranged on the outer side of one of the support seats. The workbench is raised by the support seats to increase the swing range of the large workbench. The motor 1 is externally arranged to avoid swing interference with the workbench.

[0014] In the above-mentioned three-dimensional engraving machine, the workbench includes a long flat plate and connecting plates connected to both ends of the flat plate, the upper end of the connecting plate is connected to the support seat, and a power source for driving the positioning mechanism to rotate is provided on the lower side of the workbench. The distance between the workbench and the tool holder is enlarged by the connecting plate, so that the applicable range of the workpiece is increased, and the connecting plate can also increase the swing range.

[0015] In the above-mentioned three-dimensional engraving machine, the power source includes a motor 2 and a reducer arranged under each positioning mechanism, each reducer includes a horizontally arranged transmission shaft and an output shaft perpendicular to the transmission shaft, the output shaft is used to drive the positioning mechanism to rotate, the transmission shafts of two adjacent reducers are coaxially connected in series, and the above-mentioned motor 2 is connected to the transmission shaft of the reducer located at the end.

[0016] In the above-mentioned three-dimensional engraving machine, the power source includes a motor 3 arranged under each positioning mechanism, and each motor 3 is used to drive the positioning mechanism to rotate. The output shaft of the motor 3 can directly drive the positioning mechanism to rotate, or the motor 3 can drive the positioning mechanism to rotate through the output shaft of the reducer.

[0017] Placing the power source at the bottom of the workbench can avoid interference with the workpiece and ensure that the swing range between the tool holder and the workbench will not be reduced. This structure can maintain the center of gravity balance when the workpiece is positioned in the positioning mechanism.

[0018] As a moving mode in three-dimensional space, in the above-mentioned three-dimensional engraving machine, the gantry crossbeam is fixedly connected to a vertical guide rail, a vertical carriage is slidably connected to the vertical guide rail, the tool holder is swingably connected to the vertical carriage, and the support platform is connected to the base through a horizontal cross-guide rail so that the support platform can move horizontally. Or the gantry crossbeam is fixedly connected to a horizontal cross-guide rail, a cross carriage is slidably connected to the horizontal cross-guide rail, the vertical guide rail is arranged on the cross carriage, the vertical carriage is slidably connected to the vertical guide rail, and the tool holder is swingably connected to the vertical carriage. Or the gantry crossbeam is fixedly connected to a vertical guide rail, a vertical carriage is slidably connected to the vertical guide rail, the horizontal cross-guide rail is arranged on the vertical carriage, a cross carriage is slidably connected to the horizontal cross-guide rail, and the tool holder is swingably connected to the cross carriage.

[0019] The second type of three-dimensional engraving machine is similar to the above-mentioned three-dimensional engraving machine, which includes a base and a gantry set on the base and capable of horizontal longitudinal movement, the gantry includes two columns slidably connected to the base, and is characterized in that a vertical carriage capable of vertically moving up and down is provided on the two columns, a support platform is fixed on the base, a tool holder in the form of an elongated strip and having a plurality of tool heads is provided on the vertical carriage, the tool holder is connected to the vertical carriage through a horizontal cross guide rail so that the tool holder can move horizontally, and the tool holder can swing with the strip direction of the tool holder as the axis, a workbench in the form of an elongated strip is provided on the support platform, the workbench can swing with the strip direction of the workbench as the axis, and a plurality of positioning mechanisms for positioning the workpiece are provided on the upper side of the workbench.

[0020] This three-dimensional engraving machine adopts a U-shaped gantry, and the tool holder is set on the horizontal longitudinal moving gantry and can move vertically up and down and horizontally relative to the gantry, so that the tool holder forms a three-dimensional translation relative to the support table, while the support table is fixed. On the basis of three axes, the tool holder is made to be able to swing back and forth with the strip direction as the axis, so that the tool head can swing back and forth with the tool holder, and the workbench is also made to swing back and forth with the strip direction of the workbench as the axis, and the positioning mechanism is also rotatably connected to the workbench, so that the workpiece can swing back and forth after being positioned on the positioning mechanism. Through this structure, the swing of the tool holder and the swing of the workbench form a double swing structure. This double swing structure is divided into upper and lower parts, and the tool holder and the workbench form a relative swing, which can enable the tool head to have a larger processing angle and swing precision for the workpiece, eliminate the problem of processing dead angles, can be applied to workpieces of various complex shapes, improve processing efficiency, and overcome the conventional practice that different engraving machines are required for processing when processing a general single swinging tool head.

[0021] In the above-mentioned three-dimensional engraving machine, several of the tool heads are arranged at intervals on the tool holder, and adjacent tool heads have at least two different orientations. Tool heads with different orientations form a tool head group, which is used to engrave the same workpiece. There are several groups of these engraving tool groups and they are arranged in sequence on the tool holder. The number of engraving tool groups is generally determined according to the number of positioning mechanisms. Tool heads with different orientations can select the required tool heads by swinging the tool holder, and the tool change and engraving can be performed, which improves efficiency. And tool heads with different orientations can be selected in four directions: up, down, front and back. In this way, only one tool head can be used for engraving, and the other three will not interfere with the movement and swing of the workpiece. The swinging workbench can increase the swing angle of the workpiece, thereby increasing the scope of application of a single tool head and improving processing efficiency.

[0022] In the above-mentioned three-dimensional engraving machine, the support table is provided with two support seats, the workbench is arranged between the two support seats and the two ends of the workbench are swingably connected to the support seats, and a motor 1 for driving the workbench to swing is arranged on the outer side of one of the support seats. The workbench is raised by the support seats to increase the swing range of the large workbench. The motor 1 is externally arranged to avoid swing interference with the workbench.

[0023] In the above-mentioned three-dimensional engraving machine, the workbench includes a long flat plate and connecting plates connected to both ends of the flat plate, the upper end of the connecting plate is connected to the support seat, and a power source for driving the positioning mechanism to rotate is provided on the lower side of the workbench. The distance between the workbench and the tool holder is enlarged by the connecting plate, so that the applicable range of the workpiece is increased, and the connecting plate can also increase the swing range.

[0024] In the above-mentioned three-dimensional engraving machine, the power source includes a second motor and a reducer arranged under each positioning mechanism, each reducer includes a horizontally arranged transmission shaft and an output shaft perpendicular to the transmission shaft, the output shaft is used to drive the positioning mechanism to rotate, the transmission shafts of two adjacent reducers are coaxially connected, and the above-mentioned second motor is connected to the transmission shaft of the reducer located at the end.

[0025] In the above-mentioned three-dimensional engraving machine, the power source includes a motor 3 arranged under each positioning mechanism, and each motor 3 drives the positioning mechanism to rotate. The output shaft of the motor 3 can directly drive the positioning mechanism to rotate, or the motor 3 drives the positioning mechanism to rotate through the output shaft of the reducer.

[0026] Placing the power source at the bottom of the workbench can avoid interference with the workpiece and ensure that the swing range between the tool holder and the workbench will not be reduced. This structure can maintain the center of gravity balance when the workpiece is positioned in the positioning mechanism.

[0027] The third type of three-dimensional engraving machine is similar to the above-mentioned three-dimensional engraving machine, which includes a base and a gantry set on the base and capable of horizontal longitudinal movement, the gantry includes two columns slidably connected to the base, and is characterized in that a vertical drag frame capable of vertically moving up and down is provided on the two columns, a support platform capable of horizontally moving laterally is provided on the base below the gantry, a tool holder in the shape of an elongated strip and having a plurality of tool heads is swingably connected to the vertical drag frame, the tool holder can swing with the strip direction of the tool holder as the axis, a workbench in the shape of an elongated strip is provided on the support platform, the workbench can swing with the strip direction of the workbench as the axis, and a plurality of positioning mechanisms for positioning the workpiece are provided on the upper side of the workbench.

[0028] This three-dimensional engraving machine adopts a U-shaped gantry, and the tool holder is set on the horizontal longitudinal moving gantry and can be vertically translated up and down relative to the gantry, so that the tool, and the support table moves horizontally and horizontally, so that the tool holder can form a three-dimensional translation relative to the support table. On the basis of three axes, the tool holder is made to be able to swing back and forth with the strip direction as the axis, so that the tool head can swing back and forth with the tool holder, and the workbench is also made to swing back and forth with the strip direction of the workbench as the axis, and the positioning mechanism is also rotatably connected to the workbench, so that the workpiece can rotate and swing back and forth after being positioned on the positioning mechanism. Through this structure, the swing of the tool holder and the swing of the workbench form a double swing structure. This double swing structure is divided into upper and lower parts, and the tool holder and the workbench form a relative swing, which can enable the tool head to have a larger processing angle and swing precision for the workpiece, eliminate the problem of processing dead angles, can be applied to workpieces of various complex shapes, improve processing efficiency, and overcome the conventional practice that different engraving machines are required for processing when processing a general single swinging tool head.

[0029] Compared with the existing technology, this three-dimensional engraving machine has the following advantages:

[0030] 1. This three-dimensional engraving machine integrates the three axes of tool holder swinging forward and backward, worktable swinging forward and backward, and positioning mechanism rotation on the basis of three axes of three-dimensional space translation, becoming a six-axis three-dimensional engraving machine. The swing of the tool holder and the swing of the worktable form a double swing structure. This double swing structure is divided into upper and lower parts, and the tool holder and the worktable swing relative to each other, which can enable the tool head to have a larger processing angle and swing precision for the workpiece, eliminate the problem of processing dead angles, and can be applied to workpieces of various complex shapes to improve processing efficiency.

[0031] 2. The tool heads with different directions on the tool holder can be selected by swinging the tool holder to change the tool for engraving, which improves efficiency. The tool heads with different directions can be selected in four directions: up, down, front and back. In this way, only one tool head can be used for engraving, and the other three will not interfere with the movement and swing of the workpiece, so that the swing angle of the workpiece can be increased, thereby increasing the application range of a single tool head and improving processing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the three-dimensional structure of the three-dimensional engraving machine of the first embodiment.

[0033] Figure 2 yes Figure 1 Top view of .

[0034] Figure 3 yes Figure 2 Schematic diagram of the cross-sectional structure of AA.

[0035] Figure 4 It is a schematic diagram of the three-dimensional structure of the three-dimensional engraving machine of the second embodiment.

[0036] Figure 5 It is a schematic diagram of the three-dimensional structure of the three-dimensional engraving machine of the third embodiment.

[0037] Figure 6 It is a three-dimensional structural schematic diagram of the three-dimensional engraving machine of the fourth embodiment.

[0038] Figure 7 It is a schematic diagram of the three-dimensional structure of the three-dimensional engraving machine of the fifth embodiment.

[0039] Figure 8-10 It is a structural diagram of the positioning mechanism.

[0040] In the figure, 1, base; 1a, support frame; 2, support table; 2a, support seat; 2b, bracket seat; 2c, motor one; 2d, reducer; 3, tool holder; 3a, tool head; 3b, carving knife group; 3c, motor; 3d, reducer; 4, workbench; 4a, flat plate; 4b, connecting plate; 5, turntable; 5a, positioning mechanism; 6a, horizontal longitudinal guide rail; 6b, horizontal transverse guide rail; 6c, vertical guide rail; 7, longitudinal drag frame; 8, vertical drag frame; 8a, mounting seat; 8b, gear set; 8c, motor; 8d, reducer; 81, drag plate; 82, drag frame beam; 9, power source; 9a, motor two; 9b, reducer; 9b1, transmission shaft; 9b2, output shaft; 10, transverse drag frame; 10a, bearing seat; 11, gantry beam; 12, gantry; 12a, column; 12b, connecting beam. DETAILED DESCRIPTION

[0041] The following are specific embodiments of the present invention, and the technical solutions of the present invention are further described in conjunction with the accompanying drawings, but the present invention is not limited to these embodiments.

[0042] Embodiment 1:

[0043] like Figure 1 Combined with Figure 2 , Figure 3 As shown, the three-dimensional engraving machine is a multi-tool six-axis three-dimensional engraving machine, including a base 1 and a gantry beam 11, support frames 1a on both sides of the base 1 are higher than the middle part, and a horizontal longitudinal guide rail 6a is fixed on each support frame 1a, and a longitudinal drag frame 7 is slidably connected to the horizontal longitudinal guide rail 6a, and the gantry beam 11 is a straight strip, and its two ends are fixed on the longitudinal drag frame 7 so that the gantry beam 11 can move horizontally and longitudinally, and a support table 2 is connected to the base 1 below the gantry beam 11, and a tool holder 3 in the shape of an elongated strip and having a plurality of tool heads 3a is provided on the gantry beam 11, and the tool holder 3 can form a three-dimensional translation relative to the support table 2, and the tool holder 3 can swing with the strip direction of the tool holder 3 as the axis, and a long strip workbench 4 for clamping a workpiece is provided on the support table 2, and the workbench 4 is arranged parallel to the tool holder 3 and the workbench 4 can swing with the strip direction of the workbench 4 as the axis, and a plurality of positioning mechanisms 5 that can rotate and are used to position the workpiece are provided on the upper side of the workbench 4.

[0044] Specifically, the support platform 2 is fixedly connected to the base 1, the horizontal transverse guide rail 6b is fixed to the gantry beam 11 and a transverse carriage 10 is slidably connected on the horizontal transverse guide rail 6b. The transverse carriage 10 can be a flat plate or an H-shaped bracket. The vertical guide rail 6c is arranged on the transverse carriage 10, and a vertical carriage 8 is slidably connected on the vertical guide rail 6c. The middle part of the tool holder 3 is rotatably connected to the vertical carriage 8, that is, the tool holder 3 is connected to the gantry beam 11 through the vertical guide rail 6c so that the tool holder 3 can move up and down. A mounting seat 8a is arranged on the outer side of the vertical carriage 8, and the middle part of the tool holder 3 is connected to the vertical carriage 8 through a bearing. A gear set 8b for driving the tool holder 3 to swing is arranged on the vertical carriage 8, and the gear set 8b is driven by the motor 8c through the reducer 8d. As an alternative, a transmission mechanism such as a belt or a chain can also drive the tool holder 3 to rotate. The driving mechanism for driving the vertical carriage 8 and the transverse carriage 10 to move can be a screw drive mechanism, a gear rack mechanism or a cylinder. As a simple replacement, the two ends of the tool holder 3 may be rotatably connected to the vertical carriage 8. The tool holder 3 of this structure is driven to swing by the motor 3c through the reducer 3d.

[0045] The tool holder 3 is in the shape of a long strip, and can be made into a square cross section or a circular cross section. In this example, a square cross section is adopted. A plurality of tool heads 3a are arranged at intervals on the tool holder 3, and adjacent tool heads 3a have at least two different orientations. Figure 1 In the four different directions shown, a tool spindle passes through the tool holder 3 so that two tool heads 3a are formed at both ends of the tool spindle. The adjacent tool spindle is perpendicular to the tool spindle and also passes through the tool holder 3 to form two tool heads 3a. The two tool spindles together form a group of engraving tool groups 3b, which are used to process the same workpiece. In this way, there are four tool heads 3a that can process the workpiece. There are several groups of engraving tool groups 3b and they are arranged in sequence on the tool holder 3. The number of engraving tool groups 3b is generally determined according to the number of positioning mechanisms 5a. The tool heads 3a in different directions can select the required tool heads 3a by swinging the tool holder 3, and the tool change engraving is improved, which improves the efficiency. The engraving tool group 3b can also be simplified, for example, four tool heads 3a can be simplified to three or two.

[0046] The workbench 4 includes a long flat plate 4a and connecting plates 4b connected to both ends of the flat plate 4a. The connecting plates 4b and the flat plate 4a can be an integrated structure or a split welded structure. The turntable 5 is rotatably connected to the flat plate 4a. The positioning mechanism 5a is located on the turntable 5. The positioning mechanism here is a clamping member, a top pressure member, an air adsorption member, or directly uses glue to bond the workpiece to the turntable 5. The specific positioning mechanism 5a is as follows Figure 8 The air adsorbing member shown in the figure has an air suction hole 5a1 and an air channel 5a2 arranged on the upper surface of the turntable 5, or as shown in the figure Fig. 9 The clamping member shown in the figure has a plurality of claws 5a3 disposed on the turntable 5, and the workpiece is positioned by the clamping of the claws 5a3, or as shown in the figure Fig.10 The top pressure piece shown in the figure has a T-slot on the turntable 5, a clamping bolt is connected in the T-slot, and a clamping plate is connected to the clamping bolt by a thread. A power source 9 for driving the positioning mechanism 5a to rotate is provided on the lower side of the flat plate 4a of the workbench 4. The power source 9 includes a motor 2 9a and a reducer 9b arranged below each positioning mechanism 5a, each reducer 9b includes a horizontally arranged transmission shaft 9b1 and an output shaft 9b2 perpendicular to the transmission shaft 9b1, the output shaft 9b2 is connected to the positioning mechanism 5a, the transmission shafts 9b1 of two adjacent reducers 9b are coaxially connected, and the motor 2 9a is connected to the transmission shaft 9b1 of the reducer 9b located at the end. As a simple replacement, the power source 9 can also be a motor 3 arranged below each positioning mechanism 5a, and the output shaft 9b2 of each motor 3 is connected to the positioning mechanism 5a.

[0047] Two support seats 2a are provided on the support table 2, and the workbench 4 is arranged between the two support seats 2a. The upper end of the connecting plate 4b is provided on the outer side of the connecting sleeve or the rotating shaft. The connecting plates 4b at both ends of the workbench 4 are swingably connected to the support seats 2a through bearings 2e, and a motor 1 2c is provided on the outer side of one of the support seats 2a for driving the workbench 4 to swing. The motor 1 2c is fixed on the bracket seat 2b, and the reducer 2d of the motor 1 2c is connected to the connecting plate 4b.

[0048] After the workpiece is positioned on the positioning mechanism 5a of the turntable 5, during engraving and milling, according to the program settings, the tool holder 3 swings to select a tool head 3a facing the workpiece, and controls the tool holder 3, the workbench 4 and the turntable 5 to swing in coordination with each other, so that the tool head 3a can make any spatial arc and reach any angle when engraving the workpiece.

[0049] Embodiment 2

[0050] The second embodiment is basically the same as the first embodiment, except that: Figure 4 As shown, the middle part of the gantry beam 11 is fixedly connected with a vertical guide rail 6c through a mounting plate, and a vertical carriage 8 is slidably connected to the vertical guide rail 6c. The vertical carriage 8 is a flat plate or H-shaped bracket, and the middle part of the tool holder 3 is rotatably connected to the vertical carriage 8; the support platform 2 is connected to the base 1a through a horizontal transverse guide rail 6b so that the support platform 2 can move horizontally.

[0051] Embodiment 3

[0052] The third embodiment is basically the same as the first embodiment, except that: Figure 5As shown, the gantry 12 arranged on the base 1 includes two columns 12a slidably connected to the base 1, and the two columns 12a are connected and fixed by a connecting beam 12b to form a U-shaped gantry 12. The two columns 12a are fixedly connected to the longitudinal carriage 7 so that the gantry 12 can move horizontally and longitudinally. The two columns 12a are respectively fixedly connected to the vertical guide rails 6c, and the vertical carriage 8 is slidably connected to each set of vertical guide rails 6c so that the vertical carriage 8 can move vertically up and down. The vertical carriage 8 is provided with a mounting seat 8a, and the two ends of the tool holder 3 are rotatably connected to the mounting seat 8a. The support platform 2 is connected to the base 1a through the horizontal cross rail 6b so that the support platform 2 can move horizontally and laterally.

[0053] Embodiment 4

[0054] The fourth embodiment is basically the same as the first embodiment, except that: Figure 6 As shown, the gantry 12 disposed on the base 1 includes two columns 12a slidably connected to the base 1, and the two columns 12a are connected and fixed by a connecting beam 12b to form a U-shaped gantry 12. The two columns 12a are fixedly connected to the longitudinal carriage 7 so that the gantry 12 can move horizontally and longitudinally, and the two columns 12a are respectively fixedly connected to the vertical guide rails 6c, and a vertical carriage 8 is slidably connected to each set of vertical guide rails 6c so that the vertical carriage 8 can move vertically up and down, and the vertical carriage 8 includes a carriage plate 81 and a carriage beam 82 connected between the two carriage plates 81, and a horizontal transverse guide rail 6b is fixedly connected to the carriage beam 82 in the horizontal and transverse direction, and a flat transverse carriage 10 is slidably connected to the horizontal transverse guide rail 6b, and the middle part of the tool holder 3 is rotatably connected to the transverse carriage 10.

[0055] Embodiment 5

[0056] The fifth embodiment is basically the same as the fourth embodiment, except that: Figure 7 As shown, a long horizontal carriage 10 is slidably connected to the horizontal horizontal guide rail 6b, and two outer bearing seats 10a are provided on the horizontal carriage 10. The two ends of the tool holder 3 are rotatably connected to the bearing seats 10a of the horizontal carriage 10 and the tool holder 3 is driven to swing by a motor 3c through a reducer 3d.

[0057] 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.

Claims

1. A three-dimensional engraving machine, comprising a base (1) and a gantry beam (11) connected to the base (1) and capable of horizontal and longitudinal movement, a support platform (2) is provided on the base (1) below the gantry beam (11), characterized in that: A tool holder (3) having a long strip shape and a plurality of tool heads (3a) is provided on a gantry crossbeam (11); a translation structure is provided between the tool holder (3) and the gantry crossbeam (11) so that the tool holder (3) can perform three-dimensional translation relative to a support platform (2); the tool holder (3) can swing with the strip direction of the tool holder (3) as an axis; a workbench (4) having a long strip shape is provided on the support platform (2); the workbench (4) is arranged parallel to the tool holder (3) and can swing with the strip direction of the workbench (4) as an axis; a plurality of positioning mechanisms (5a) for positioning workpieces are provided on the upper side of the workbench (4); the positioning mechanisms (5a) can swing relative to the workbench (2); The tool head (3a) is arranged at intervals on the tool holder (3), and adjacent tool heads (3a) have at least two different orientations, and adjacent tool heads (3a) with different orientations form a tool head group for engraving the same workpiece; the support table (2) is provided with two support seats (2a), the work table (4) is arranged between the two support seats (2a), and the two ends of the work table (4) are swingably connected to the support seats (2a), the work table (4) comprises a long flat plate (4a) and a connecting plate (4b) connected to the two ends of the flat plate (4a), the upper end of the connecting plate (4b) is swingably connected to the support seat (2a), and the lower end of the connecting plate (4b) is fixedly connected to the flat plate (4a).

2. The three-dimensional engraving machine according to claim 1, characterized in that: A plurality of rotatable turntables (5) are provided on the workbench (4), and the positioning mechanism (5a) is arranged on the turntables (5).

3. The three-dimensional engraving machine according to claim 1, characterized in that: A plurality of rotatable output shafts are provided on the workbench (4), and the positioning mechanism (5a) is arranged on the output shafts.

4. The three-dimensional engraving machine according to claim 1, characterized in that: A motor (2c) for driving the workbench (4) to swing is provided on the outside of one of the support seats (2a).

5. The three-dimensional engraving machine according to claim 1, characterized in that: A power source (9) for driving the workpiece positioning mechanism (5a) to rotate is provided on the lower side of the workbench (4).

6. The three-dimensional engraving machine according to claim 1, characterized in that: The gantry crossbeam (11) is fixedly connected to a horizontal cross guide rail (6b), a cross carriage (10) is slidably connected to the horizontal cross guide rail (6b), a vertical guide rail (6c) is arranged on the cross carriage (10), a vertical carriage (8) is slidably connected to the vertical guide rail (6c), and the tool holder (3) is swingably connected to the vertical carriage (8).

7. The three-dimensional engraving machine according to claim 1, characterized in that: The gantry crossbeam (11) is fixedly connected to the vertical guide rail (6c), and a vertical carriage (8) is slidably connected to the vertical guide rail (6c). The horizontal cross guide rail (6b) is arranged on the vertical carriage (8), and a cross carriage (10) is slidably connected to the horizontal cross guide rail (6b). The tool holder (3) is swingably connected to the cross carriage (10).

8. A three-dimensional engraving machine, comprising a base (1) and a gantry (12) arranged on the base (1) and capable of horizontal and longitudinal movement, wherein the gantry (12) comprises two columns (12a) slidably connected to the base (1), characterized in that: A vertical carriage (8) capable of moving vertically up and down is provided on the two upright columns (12a), a support platform (2) is fixed on the base (1), a tool holder (3) in the form of an elongated strip and having a plurality of tool heads (3a) is provided on the vertical carriage (8), the tool holder (3) being connected to the vertical carriage (8) via a horizontal transverse guide rail (6b) so that the tool holder (3) can move horizontally, and the tool holder (3) can swing with the strip direction of the tool holder (3) as the axis, a workbench (4) in the form of an elongated strip is provided on the support platform (2), the workbench (4) is arranged parallel to the tool holder (3) and the workbench (4) can swing with the strip direction of the workbench (4) as the axis, and a plurality of positioning mechanisms for positioning workpieces are provided on the upper side of the workbench (4). The positioning mechanism (5a) is rotatable relative to the workbench (4); a plurality of the tool heads (3a) are arranged at intervals on the tool holder (3), and adjacent tool heads (3a) have at least two different orientations, and adjacent tool heads (3a) with different orientations form a tool head group for engraving the same workpiece; the support table (2) is provided with two support seats (2a), the workbench (4) is arranged between the two support seats (2a), and the two ends of the workbench (4) are swingably connected to the support seats (2a), and the workbench (4) comprises a long flat plate (4a) and a connecting plate (4b) connected to the two ends of the flat plate (4a), the upper end of the connecting plate (4b) is swingably connected to the support seat (2a), and the lower end of the connecting plate (4b) is fixedly connected to the flat plate (4a).

9. The three-dimensional engraving machine according to claim 8, characterized in that: A motor (2c) for driving the workbench (4) to swing is provided on the outside of one of the support seats (2a).

10. The three-dimensional engraving machine according to claim 8, characterized in that: A power source (9) for driving the workpiece positioning mechanism (5a) to rotate is provided on the lower side of the workbench (4).

11. The three-dimensional engraving machine according to claim 8, characterized in that: The vertical carriage (8) is fixedly connected to a horizontal transverse guide rail (6b), a transverse carriage (10) is slidably connected to the horizontal transverse guide rail (6b), and the middle part or both ends of the tool holder (3) are swingably connected to the transverse carriage (10).

12. A three-dimensional engraving machine, comprising a base (1) and a gantry (12) arranged on the base (1) and capable of horizontal and longitudinal movement, wherein the gantry (12) comprises two columns (12a) slidably connected to the base (1), characterized in that: A vertical carriage (8) capable of moving vertically up and down is provided on the two upright columns (12a); a support platform (2) capable of moving horizontally is provided on the base (1) below the gantry (12); a tool holder (3) in the shape of an elongated strip and having a plurality of tool heads (3a) is swingably connected to the vertical carriage (8); the tool holder (3) can swing with the strip direction of the tool holder (3) as the axis; a workbench (4) in the shape of an elongated strip is provided on the support platform (2); the workbench (4) is arranged parallel to the tool holder (3) and can swing with the strip direction of the workbench (4) as the axis; and a plurality of positioning mechanisms (5a) for positioning workpieces are provided on the upper side of the workbench (4); the positioning mechanisms (5a) is rotatable relative to the workbench (4); a plurality of the tool heads (3a) are arranged at intervals on the tool holder (3), and adjacent tool heads (3a) have at least two different orientations, and adjacent tool heads (3a) with different orientations form a tool head group for engraving the same workpiece; two support seats (2a) are provided on the support table (2), the workbench (4) is arranged between the two support seats (2a), and the two ends of the workbench (4) are swingably connected to the support seats (2a), the workbench (4) comprises a long strip-shaped flat plate (4a) and a connecting plate (4b) connected to the two ends of the flat plate (4a), the upper end of the connecting plate (4b) is swingably connected to the support seat (2a), and the lower end of the connecting plate (4b) is fixedly connected to the flat plate (4a).

13. The three-dimensional engraving machine according to claim 12, characterized in that: A motor (2c) for driving the workbench (4) to swing is provided on the outside of one of the support seats (2a).

14. The three-dimensional engraving machine according to claim 12, characterized in that: A power source (9) for driving the workpiece positioning mechanism (5a) to rotate is provided on the lower side of the workbench (4).

15. A three-dimensional engraving machine, comprising a base (1) and a gantry beam (11) connected to the base (1) and capable of horizontal and longitudinal movement, a support platform (2) is provided on the base (1) below the gantry beam (11), characterized in that: A tool holder (3) having a long strip shape and a plurality of tool heads (3a) is provided on the gantry crossbeam (11); a vertical guide rail (6c) is fixedly connected to the gantry crossbeam (11); a vertical carriage (8) is slidably connected to the vertical guide rail (6c); the tool holder (3) is swingably connected to the vertical carriage (8); the support platform (2) is connected to the base (1) via a horizontal cross guide rail (6b) so that the support platform (2) can move horizontally; the tool holder (3) can swing with the strip direction of the tool holder (3) as the axis; a workbench (4) having a long strip shape is provided on the support platform (2); the workbench (4) is arranged parallel to the tool holder (3) and can swing with the strip direction of the workbench (4) as the axis; a plurality of tools for use are provided on the upper side of the workbench (4). A positioning mechanism (5a) for positioning a workpiece; the positioning mechanism (5a) can rotate relative to the workbench (4); a plurality of the tool heads (3a) are arranged at intervals on the tool holder (3), and adjacent tool heads (3a) have at least two different orientations, and adjacent tool heads (3a) with different orientations form a tool head group for engraving the same workpiece; two support seats (2a) are provided on the support table (2), the workbench (4) is arranged between the two support seats (2a), and the two ends of the workbench (4) are swingably connected to the support seats (2a), and the workbench (4) includes a long flat plate (4a) and a connecting plate (4b) connected to the two ends of the flat plate (4a), the upper end of the connecting plate (4b) is swingably connected to the support seat (2a), and the lower end of the connecting plate (4b) is fixedly connected to the flat plate (4a).

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