Engraving and milling machine with multi-tool-bit machining error compensation function

Abstract

The utility model discloses a multi-tool-bit machining error compensation engraving and milling machine which comprises an integrated support, the integrated support comprises a base, a Y-direction sliding table and a plurality of workpiece clamps arranged on the Y-direction sliding table are fixed to the top of the base, and a portal frame is fixed to one side of the top of the base; an X-direction sliding table is fixed to one side of the portal frame, and a fixing plate is fixed to the movable end of the X-direction sliding table. By integrating the workpiece error compensation mechanism, the tool bit error compensation mechanism and the tool bit coordinate detection function, the machining precision is remarkably improved. The workpiece error compensation mechanism drives a moving block through symmetrically-distributed linear motors, the position of a workpiece is dynamically adjusted, and workpiece deformation or installation errors are compensated. The tool bit error compensation mechanism achieves tool bit fine adjustment through a gear-rack mechanism to cope with tool abrasion or thermal deformation. A coordinate detection function of each tool bit monitors position deviation in real time, and a linkage control system carries out accurate adjustment. The comprehensive compensation mechanism effectively reduces accumulative errors in multi-tool-bit machining.

Description

Technical Field

[0001] This utility model relates to the field of engraving machine technology, and in particular to an engraving machine with multi-head machining error compensation. Background Technology

[0002] As a high-precision CNC machining equipment, engraving machines are widely used in mold manufacturing, precision engraving, and batch parts processing. In existing technologies, to improve production efficiency, engraving machines often employ a multi-head parallel processing design, using multiple cutters to process the workpiece simultaneously, combined with X, Y, and Z-axis slides and gantry structures to achieve complex motion trajectories. Some machines are equipped with rotary table fixtures for workpiece positioning and rotation to support multi-station processing. Furthermore, existing engraving machines calibrate the cutter and workpiece positions through mechanical adjustments or CNC programming to reduce assembly and machining errors. These technological advancements enable engraving machines to meet the demands of batch, high-precision processing, and are widely used in fields such as electronic components and medical devices.

[0003] However, existing CNC engraving machines still have significant drawbacks in multi-head machining. Due to unavoidable assembly errors during multi-head installation and positional coordinate errors caused by the rotation of the turntable fixture, it is difficult for each head to maintain consistent machining accuracy, leading to accumulated machining errors. This results in a higher defect rate and a lower yield rate, severely impacting production efficiency and product quality. Traditional error compensation methods, such as manual adjustment or simple programming, are insufficient to dynamically address issues like tool wear and workpiece deformation, and their compensation accuracy is limited. Furthermore, insufficient synchronization among multiple heads further exacerbates errors, increasing production costs and the burden of waste disposal. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a precision engraving machine with multi-head machining error compensation.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A precision engraving machine with multi-head machining error compensation includes an integrated support frame, comprising: a base, on the top of which is fixed an X-axis slide and a plurality of workpiece fixtures disposed on the X-axis slide; a gantry frame is fixed to one side of the top of the base; a Y-axis slide is fixed to one side of the gantry frame, and a fixed plate is fixed to the moving end of the Y-axis slide; a plurality of Z-axis slides and machining heads vertically disposed on each Z-axis slide and corresponding one-to-one with each workpiece fixture are fixed on the fixed plate; wherein guide rails are preferably fixed on both sides of the Z-axis slides to guide the movement of the Z-axis slides to ensure positional accuracy.

[0007] A workpiece error compensation mechanism, mounted on an integrated bracket, is used to adjust the workpiece position to compensate for machining errors. It includes: a precision carving adjustment unit, located at the moving end of the Z-axis slide, comprising a first plate with a cutter head fixed to one side and several first grooves on one side of the first plate cooperating with guide rails; and a workpiece compensation unit, located at the moving end of the X-axis slide and connected to the workpiece fixture, comprising a housing, several linear motors (symmetrically arranged within the housing), several moving blocks, and fixed blocks. A workpiece fixture is fixed to the top of each moving block and also to the top of each fixed block. Preferably, the workpiece compensation unit further includes a first rail arranged within the housing in the same direction as the linear motor travel, a second groove located below the moving blocks and matching the first rail, and a first nut located below the moving blocks and matching the output shaft of the linear motors. The moving blocks are symmetrically arranged on both sides of the fixed blocks, ensuring accurate positioning and convenient linkage adjustment between the workpiece fixtures.

[0008] A tool head error compensation mechanism, mounted on an integrated bracket, is used to adjust the tool head position to compensate for machining errors. It includes: an adjustment component, located at the moving end of the X-axis slide table, used for coarse adjustment of the tool head; the component includes a base plate and a mounting plate; the mounting plate is fixed to the top of the base plate, and a workpiece fixture is fixed to its top to achieve equidistant installation of each workpiece fixture; a tool head compensation unit, used for fine adjustment of the tool head, including: a second plate, one side of which is fixed with a rack and a second slide rail, and preferably one side of the second plate has a third slide groove matching the guide slide rail; a third plate, one side of which is fixed with a fourth slide groove and the other side of which is fixed with the tool head, the fourth slide groove slidingly engaging with the second slide rail; a gear, located in the opening of the third plate and meshing with the rack; and a drive motor, fixed to the third plate, whose output shaft is connected to the gear transmission.

[0009] Several cutting heads and several workpiece fixtures are respectively set on the workpiece error compensation mechanism and the cutting head error compensation mechanism, with one-to-one correspondence between the cutting heads and the workpiece fixtures.

[0010] The integrated bracket provides a fixed foundation for all slides and compensation mechanisms. The slides (X-axis, Y-axis, Z-axis) cooperate with each other through fixed plates and gantry frames to ensure accurate positioning.

[0011] One of the workpiece error compensation mechanism and the tool head error compensation mechanism is selected and set on the integrated bracket, and is respectively connected to the X-axis slide table or the Z-axis slide table to achieve dynamic fine adjustment;

[0012] The linear motor and the drive motor are connected to the workpiece compensation unit and the tool head compensation unit respectively to drive the moving block and the tool head.

[0013] In addition, the cutting head has a coordinate detection function, which monitors the spatial position of the cutting head in real time through a built-in detection system. When a workpiece error compensation mechanism is used, the workpiece fixture on the middle fixed block is used as a reference. A linear motor drives the moving blocks on both sides to move the workpiece fixtures on both sides accordingly, thereby compensating for the workpiece position error. When a cutting head error compensation mechanism is used, the middle cutting head is used as a reference. If other cutting heads are found to deviate from their corresponding workpiece fixtures, the corresponding cutting head is fine-tuned by a drive motor to achieve dynamic compensation of the cutting head position.

[0014] This utility model has the following beneficial effects:

[0015] 1. This utility model significantly improves machining accuracy by integrating a workpiece error compensation mechanism, a tool head error compensation mechanism, and a tool head coordinate detection function. The workpiece error compensation mechanism utilizes symmetrically distributed linear motors to drive moving blocks, dynamically adjusting the workpiece position to compensate for workpiece deformation or installation errors. The tool head error compensation mechanism uses a gear-rack mechanism to achieve fine-tuning of the tool head, addressing tool wear or thermal deformation. Each tool head is equipped with a coordinate detection function to monitor position deviations in real time, and the linkage control system performs precise adjustments. This comprehensive compensation mechanism effectively reduces cumulative errors in multi-tool head machining, reduces the defect rate, and achieves sub-micron level machining accuracy. It is particularly suitable for high-precision mold manufacturing and micro-part machining, significantly improving product quality and production consistency.

[0016] 2. This utility model significantly improves production efficiency through multi-head parallel processing and a one-to-one corresponding workpiece fixture design. Multiple Z-axis slides support synchronous operation of multiple heads, and in conjunction with the X, Y, and Z-axis three-axis linkage system, enable rapid processing of complex workpieces. The head coordinate detection function provides real-time feedback of position data, and combined with the workpiece and head error compensation mechanism, reduces rework or scrap caused by errors. The one-to-one correspondence between the workpiece fixture and the head ensures the coordination of multi-station processing, avoiding the efficiency loss caused by insufficient synchronization in traditional multi-head equipment. This design enables the equipment to significantly shorten the production cycle, increase output per unit time, and reduce production costs in mass production scenarios.

[0017] 3. The modular design and stable mechanical structure of this invention enhance the adaptability and reliability of the equipment. The integrated bracket supports flexible configuration of workpiece or tool head error compensation mechanisms to meet different processing needs, such as precision engraving or mold processing. The guide rail, rail-groove structure, and symmetrical linear motor layout ensure smooth movement and positioning accuracy, reducing the impact of mechanical vibration on processing quality. The tool head coordinate detection function further enhances the equipment's adaptability to complex workpieces, dynamically compensating for various error sources. The stable mechanical structure and intelligent error compensation mechanism extend the equipment's service life, reduce maintenance frequency, and enable it to perform excellently in high-intensity, long-term industrial environments, making it particularly suitable for large-scale production line applications. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the integrated support structure;

[0019] Figure 2 This is one of the structural schematic diagrams of the engraving machine in Example 1;

[0020] Figure 3 This is the second schematic diagram of the engraving machine structure in Example 1;

[0021] Figure 4 This is a schematic diagram of the precision-carved adjustment unit structure;

[0022] Figure 5 This is a schematic diagram of the workpiece compensation unit structure;

[0023] Figure 6 This is one of the exploded structural diagrams of the workpiece compensation unit;

[0024] Figure 7 This is the second exploded structural diagram of the workpiece compensation unit;

[0025] Figure 8 This is one of the schematic diagrams of the engraving machine structure in Example 2;

[0026] Figure 9 This is the second schematic diagram of the engraving machine structure in Example 2;

[0027] Figure 10 A schematic diagram of the adjustment component structure;

[0028] Figure 11 This is a schematic diagram of the cutter head compensation unit structure;

[0029] Figure 12 This is a schematic diagram of the exploded structure of the cutter head compensation unit.

[0030] In the diagram: 1. Integrated bracket; 101. Base; 102. X-axis slide table; 103. Gantry frame; 104. Y-axis slide table; 105. Fixing plate; 106. Z-axis slide table; 107. Guide slide rail; 2. Workpiece error compensation mechanism; 201. Precision carving adjustment unit; 201a. First plate; 201b. First slide rail; 202. Workpiece compensation unit; 202a. Box; 202b. Linear motor; 202c. First slide rail; 202d. Moving block; 202e. Second... 3. Slide groove; 202f, first nut; 202g, fixing block; 3. Tool head error compensation mechanism; 301, adjusting assembly; 301a, base plate; 301b, mounting plate; 302, tool head compensation unit; 302a, second plate; 302b, third slide groove; 302c, rack; 302d, second slide rail; 302e, fourth slide groove; 302f, third plate; 302g, opening; 302h, drive motor; 302i, gear; 4. Tool head; 5. Workpiece fixture. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0032] Example 1:

[0033] Reference Figures 1-7 In this utility model, the engraving machine with multi-head machining error compensation includes: an integrated support 1, including a base 101, an X-axis slide 102 fixed on the top of the base 101 and a plurality of workpiece clamps 5 disposed on the X-axis slide 102, a gantry frame 103 fixed on one side of the top of the base 101, a Y-axis slide 104 fixed on one side of the gantry frame 103, a fixed plate 105 fixed at the moving end of the Y-axis slide 104, a plurality of Z-axis slides 106 and cutters 4 vertically disposed on the Z-axis slides 106 and corresponding one-to-one with the workpiece clamps 5 are fixed on the fixed plate 105; a workpiece error compensation mechanism 2 is disposed on the integrated support 1 and connected to the workpiece clamps 5; a plurality of cutters 4 are disposed on the workpiece error compensation mechanism 2; and a plurality of workpiece clamps 5 are disposed on the workpiece error compensation mechanism 2.

[0034] In this embodiment, the integrated support 1 consists of a base 101, an X-axis slide 102, a gantry frame 103, a Y-axis slide 104, a fixing plate 105, and a Z-axis slide 106. The base 101 provides stable support; the X-axis slide 102 is mounted on top of the base 101 for lateral movement; the gantry frame 103 is fixed to one side of the top of the base 101, providing support for the Y-axis slide 104; the moving end of the Y-axis slide 104 is fixed to the fixing plate 105 as a positioning reference; several Z-axis slides 106 are equidistantly arranged on the fixing plate 105 for precise vertical adjustment. Simultaneously, the coordinate detection function equipped on the cutter head 4 can monitor the cutter head position in real time, ensuring overall machining accuracy and stability.

[0035] In this utility model, guide rails 107 are fixed on both sides of the Z-axis slide table 106.

[0036] In this embodiment, guide rails 107 are fixed on both sides of the Z-axis slide table 106 to limit and guide the vertical movement path of the Z-axis slide table 106, thereby improving its movement stability and accuracy.

[0037] In this utility model, the workpiece error compensation mechanism 2 includes: a precision carving adjustment unit 201, which is disposed at the moving end of the Z-axis slide table 106; and a workpiece compensation unit 202, which is disposed at the moving end of the X-axis slide table 102.

[0038] In this embodiment, the workpiece error compensation mechanism 2 includes a precision carving adjustment unit 201 and a workpiece compensation unit 202. The precision carving adjustment unit 201 is located at the moving end of the Z-axis slide 106 and is used to make precise height adjustments to the tool head to improve machining accuracy. The workpiece compensation unit 202 is located at the moving end of the X-axis slide 102 and can dynamically drive the workpiece fixture to achieve error compensation between multiple workstations, ensuring the consistency and stability of the machining position.

[0039] In this utility model, the precision carving adjustment unit 201 includes: a first plate 201a, with a cutter head 4 fixed on one side; a plurality of first slide grooves 201b, disposed on one side of the first plate 201a and cooperating with the guide slide rail 107; the workpiece compensation unit 202 includes: a box 202a; a plurality of linear motors 202b, symmetrically disposed in the box 202a; a plurality of moving blocks 202d, connected to the linear motors 202b in a transmission manner, with a workpiece clamp 5 fixed on the top for supporting the workpiece clamp 5; and a fixing block 202g, fixedly connected to the box 202a, with the workpiece clamp 5 fixed on the top of the fixing block 202g.

[0040] In this embodiment, the precision carving adjustment unit 201 fixes the cutter head 4 to the first plate 201a, and uses several first slide grooves 201b set on one side of it to cooperate with the guide slide rail 107 to realize the smooth guidance and fine adjustment function of the cutter head in the Z direction; the workpiece compensation unit 202 includes a box body 202a as an overall load-bearing structure, with several linear motors 202b symmetrically arranged inside, driving and connecting several moving blocks 202d, which are used to adjust and fix the workpiece clamp 5 on its top. The workpiece clamp 5 is also installed on the fixed block 202g set in the middle, which serves as a reference benchmark for error compensation and realizes dynamic correction of the workpiece position.

[0041] In this utility model, the workpiece compensation unit 202 further includes: a first slide rail 202c, which is disposed inside the housing 202a and whose direction is consistent with the stroke direction of the linear motor 202b; a second slide groove 202e, which is disposed below the moving block 202d and matches the first slide rail 202c; and a first nut 202f, which is disposed below the moving block 202d and matches the output shaft of the linear motor 202b.

[0042] In this embodiment, the workpiece compensation unit 202 provides guiding support for the linear movement of the moving block 202d by setting a first slide rail 202c inside the housing 202a. The second slide groove 202e is set below the moving block 202d and slides in cooperation with the first slide rail 202c to ensure that the workpiece fixture 5 moves smoothly and accurately. At the same time, the first nut 202f is set below the moving block 202d and connected to the output shaft of the linear motor 202b to realize the drive control of the moving block 202d, thereby performing efficient and accurate error compensation for the workpiece position.

[0043] In this invention, several movable blocks 202d are symmetrically arranged on both sides of the fixed block 202g.

[0044] In this embodiment, several moving blocks 202d are symmetrically arranged on both sides of the fixed block 202g. By connecting with the linear motor 202b, the workpiece clamps 5 on both sides can be independently driven and adjusted. With the workpiece clamps 5 on the fixed block 202g as the reference, the workpiece clamps 5 on the left and right sides can be synchronously or differentially compensated during the processing, which effectively improves the overall processing accuracy and consistency.

[0045] In this utility model, there is a one-to-one correspondence between several cutting heads 4 and several workpiece fixtures 5.

[0046] In this embodiment, there is a one-to-one correspondence between several cutting heads 4 and several workpiece fixtures 5. By fixing them in the corresponding positions, a precise processing pairing relationship is achieved. Each cutting head 4 is matched with an independent workpiece fixture 5, which helps to maintain the consistency between the processing trajectory and the workpiece position when processing at multiple stations simultaneously, and further improves processing efficiency and finished product accuracy.

[0047] During use, the cutter head 4 has a coordinate detection function, which can identify the positional deviation of the workpiece at each station. Taking the intermediate workpiece fixture 5 installed on the fixed block 202g as a reference, when the system detects that the workpiece fixture 5 at other positions is offset, the control system drives the linear motor 202b to drive the corresponding moving block 202d to slide along the first slide rail 202c in the box 202a. The second slide groove 202e cooperates with the first slide rail 202c to achieve smooth guidance, thereby accurately adjusting the position of the deviated workpiece and realizing error compensation. This ensures that all cutter heads 4 and the corresponding workpiece fixture 5 maintain a consistent relative processing position, improving the accuracy and consistency of the engraving process.

[0048] Example 2:

[0049] Reference Figures 8-12 In this utility model, unlike Embodiment 1, a tool head error compensation mechanism 3 is provided on the integrated bracket 1; a plurality of tool heads 4 are provided on the tool head error compensation mechanism 3; and a plurality of workpiece clamps 5 are provided on the tool head error compensation mechanism 3.

[0050] In this embodiment, the integrated bracket 1 is equipped with a tool head error compensation mechanism 3, which is used to fine-tune the position of multiple tool heads 4 during processing, thereby compensating for deviations generated during installation or operation of each tool head and improving processing consistency and accuracy. Several tool heads 4 are mounted on the tool head error compensation mechanism 3 and have coordinate detection capabilities, enabling real-time monitoring of deviations from the reference tool head. Several workpiece fixtures 5 are set on the tool head error compensation mechanism 3, corresponding to the workpieces and ensuring a one-to-one match with the tool heads 4. Thus, when processing deviations are detected, precise compensation is achieved by driving the position of the tool heads, ensuring the processing accuracy of each station.

[0051] In this utility model, the tool head error compensation mechanism 3 includes: an adjustment component 301, which is set at the moving end of the X-axis slide table 102 and is used for coarse adjustment of the tool head; and a tool head compensation unit 302.

[0052] In this embodiment, the tool head error compensation mechanism 3 includes an adjustment component 301 and a tool head compensation unit 302, which together constitute a structure system for multi-level adjustment of the position of the tool head 4. The adjustment component 301 is located at the moving end of the X-axis slide 102 and undertakes the function of overall coarse positioning of the tool head 4 to ensure that each tool head is roughly in place. The tool head compensation unit 302 realizes fine-tuning, and can compare the position of the reference tool head with the aid of coordinate detection, and accurately compensate for the small deviations of other tool heads, thereby ensuring the positioning consistency and cutting accuracy when multiple tool heads are processed simultaneously.

[0053] In this utility model, the adjustment component 301 includes: a base plate 301a, disposed at the movable end of the X-axis slide table 102; a mounting plate 301b, fixed to the top of the base plate 301a, with a workpiece clamp 5 fixed to the top of the mounting plate 301b for equidistantly mounting several workpiece clamps 5; the cutter head compensation unit 302 includes: a second plate 302a, with a rack 302c and a second slide rail 302d fixed on one side; a third plate 302f, with a fourth slide groove 302e fixed on one side and a cutter head 4 fixed on the other side, the fourth slide groove 302e slidingly engaging with the second slide rail 302d; a gear 302i, rotatably disposed within the opening 302g of the third plate 302f, meshing with the rack 302c; and a drive motor 302h, fixed on the third plate 302f, with its output shaft drivingly connected to the gear 302i.

[0054] In this embodiment, the adjustment component 301 is installed on the moving end of the X-axis slide table 102 via the base plate 301a, serving as the basic structure for coarse adjustment of the cutter head 4 and fixation of the workpiece fixture 5. The mounting plate 301b is located on its top and fixes multiple workpiece fixtures 5 at equal intervals to ensure that the workpieces are arranged neatly and consistently. The cutter head compensation unit 302 cooperates with the rack 302c on the second plate 302a and the second slide rail 302d with the fourth slide groove 302e on the third plate 302f to achieve sliding adjustment of the cutter head 4 within a small error range. The gear 302i meshes with the rack 302c and is driven to rotate by the drive motor 302h, causing the third plate 302f to drive the cutter head 4 to perform fine adjustment, thereby improving the positioning consistency and machining accuracy among multiple cutters.

[0055] In this utility model, a third slide groove 302b matching the guide slide rail 107 is provided on one side of the second plate 302a.

[0056] In this embodiment, a third groove 302b matching the guide rail 107 is provided on one side of the second plate 302a. This design enables the second plate 302a to slide stably under the guidance of the guide rail 107, ensuring that the cutter head 4 maintains stable operation during fine adjustment, avoiding errors or vibrations caused by unstable sliding, and improving processing accuracy and stability.

[0057] In operation, when the tool head error compensation mechanism 3 is used, the tool head 4 serves as a reference. By real-time monitoring of the relative positions of other tool heads and the workpiece fixture 5, if a deviation is detected, the system will activate the drive motor 302h. The drive motor 302h drives the rack 302c via the gear 302i, allowing the tool head 4 to be finely adjusted on a precise track, thereby eliminating errors and restoring consistency between the tool heads. This adjustment process is completed by the tool head compensation unit 302, ensuring precise alignment of the tool head and the workpiece fixture 5 during machining, achieving high-precision machining results.

[0058] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A precision engraving machine with multi-head machining error compensation, characterized in that, include: An integrated support (1) includes a base (101), an X-axis slide (102) and several workpiece fixtures (5) fixed on the top of the base (101), a gantry frame (103) fixed on one side of the top of the base (101), a Y-axis slide (104) fixed on one side of the gantry frame (103), a fixed plate (105) fixed at the moving end of the Y-axis slide (104), and several Z-axis slides (106) and cutter heads (4) vertically arranged on each Z-axis slide (106) and corresponding to each workpiece fixture (5). The workpiece error compensation mechanism (2) is set on the integrated bracket (1) and connected to the workpiece fixture (5) to adjust the position of the workpiece fixture (5) to compensate for the processing error; The tool head error compensation mechanism (3) is set on the integrated bracket (1) and connected to the tool head (4) for adjusting the tool head position to compensate for machining errors; The integrated bracket (1) is provided with either the workpiece error compensation mechanism (2) or the tool head error compensation mechanism (3).

2. The multi-tool head machining error compensation precise engraving machine according to claim 1, characterized in that, Guide rails (107) are fixed on both sides of the Z-axis slide (106) to guide the movement of the Z-axis slide (106).

3. The multi-tool head machining error compensation precise engraving machine according to claim 1, characterized in that, The workpiece error compensation mechanism (2) includes: The precision carving adjustment unit (201) is set at the moving end of the Z-axis slide (106) and is used to adjust the position of the cutter head (4) in the Z-axis direction; The workpiece compensation unit (202) is disposed at the moving end of the X-axis slide (102) and is used to dynamically adjust the workpiece position.

4. The multi-tool head machining error compensation precise engraving machine according to claim 3, characterized in that, The precision carving adjustment unit (201) includes: The first plate (201a) has the cutter head (4) fixed on one side. Several first grooves (201b) are disposed on one side of the first plate (201a) and cooperate with the guide rail (107); The workpiece compensation unit (202) includes: Box body (202a); Several linear motors (202b) are symmetrically arranged inside the housing (202a); Several moving blocks (202d) are connected to the linear motor (202b) for transmission, and a workpiece clamp (5) is fixed on the top for connecting the workpiece clamp (5); A fixing block (202g) is fixedly connected to the box body (202a), and a workpiece clamp (5) is fixed on the top of the fixing block (202g) for fixing the workpiece clamp (5).

5. The multi-tool head machining error compensation precise engraving machine according to claim 4, characterized in that, The workpiece compensation unit (202) further includes: The first slide rail (202c) is disposed inside the housing (202a) and its direction is consistent with the travel direction of the linear motor (202b); The second slide rail (202e) is disposed below the moving block (202d) and matches the first slide rail (202c); The first nut (202f) is located below the moving block (202d) and matches the output shaft of the linear motor (202b).

6. The multi-tool head machining error compensation precise engraving machine according to claim 4, characterized in that, Several of the movable blocks (202d) are symmetrically arranged on both sides of the fixed block (202g).

7. The multi-tool head machining error compensation precise engraving machine according to claim 2, characterized in that, The tool error compensation mechanism (3) includes: An adjustment component (301) is provided at the movable end of the X-axis slide (102) for coarse adjustment of the cutter head; The cutter head compensation unit (302) is used for fine-tuning of the cutter head.

8. The multi-tool head machining error compensation precise engraving machine according to claim 7, characterized in that, The adjustment component (301) includes: The base plate (301a) is located at the moving end of the X-axis slide (102) and is used for transmission; Mounting plate (301b) is fixed to the top of base plate (301a). A workpiece clamp (5) is fixed to the top of mounting plate (301b) for equidistant mounting of a number of workpiece clamps (5). The cutter head compensation unit (302) includes: The second plate (302a) has a rack (302c) and a second slide rail (302d) fixed on one side. The third plate (302f) has a fourth slide groove (302e) fixed on one side and a cutter head (4) fixed on the other side. The fourth slide groove (302e) is slidably engaged with the second slide rail (302d). The gear (302i) is rotatably disposed in the opening (302g) of the third plate (302f) and meshes with the rack (302c); The drive motor (302h) is fixed on the third plate (302f), and its output shaft is connected to the gear (302i).

9. The multi-tool head machining error compensation precise engraving machine according to claim 8, characterized in that, The second plate (302a) has a third groove (302b) on one side that matches the guide rail (107).

10. The multi-tool head machining error compensation precise engraving machine according to claim 1, characterized in that, There is a one-to-one correspondence between the plurality of cutting heads (4) and the plurality of workpiece fixtures (5).

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