A hand-operated three-axis displacement pneumatic marking device

Abstract

The application discloses a kind of manual three-axis variable position pneumatic marking device, it is related to engine assembly assembly line technical field, the manual three-axis variable position pneumatic marking device includes: assembly line body, built-in tray, three-axis variable position base, engine cylinder, pneumatic marking machine, marking positioning tool, trapezoidal screw rod, marking Z-axis variable position guide rail, handle type guide rail holder, marking Y-axis variable position guide rail and marking X-axis variable position guide rail;The built-in tray is slidably assembled on the assembly line body, for carrying the engine cylinder along the assembly line conveying, three-axis variable position mechanism overall carries pneumatic marking machine dead weight and marking counter shock force, without artificial continuous holding heavy object, greatly reduce worker labor intensity, not easy to fatigue, improve emergency marking efficiency, guarantee the capacity of whole production line, marking vibration is absorbed by rigid base, without artificial holding shaking, clear and complete, marking quality is stable.

Description

Technical Field

[0001] This invention relates to the field of engine assembly line technology, specifically to a manual three-axis displacement pneumatic marking device. Background Technology

[0002] Under normal operating conditions, the engine assembly line uses fully automated pneumatic marking equipment to mark the assembly line number on the exhaust side of the engine block. When the fully automated marking equipment malfunctions and stops, the production line needs to switch to a manual emergency marking solution. The existing emergency solution involves an operator holding a pneumatic marking machine and manually marking the designated position on the cylinder block. However, this solution has several drawbacks: Pneumatic engraving machines are heavy, and long-term handheld operation greatly increases the labor load of workers, making them prone to fatigue, resulting in low engraving efficiency and slowing down the production capacity of the entire assembly line. When a pneumatic engraving machine is engraving, it generates a continuous reverse vibration force. The vibration cannot be countered by manual holding, resulting in blurry and incomplete engraved characters and substandard engraving quality. The process is entirely manual with no standardized positioning reference. The marking position of each engine cylinder block relies entirely on the worker's feel, resulting in poor consistency in marking positions and low standardization of product appearance. Without a dedicated load-bearing and positioning mechanism, it cannot be operated in batches or in a standardized manner, resulting in poor stability in emergency production.

[0003] The existing technical solutions have obvious limitations in practice: the existing solutions require employees to hand-hold the pneumatic engraving machine. Because the pneumatic engraving machine is heavy, it is difficult for employees to operate, resulting in low efficiency, affecting the overall production line capacity. Moreover, long-term operation puts a heavy burden on employees and easily causes fatigue. In addition, during the pneumatic engraving process, the engraving machine will generate a recoil force, which will cause the employee to be unstable in holding it, ultimately resulting in unclear engraved production line numbers. Furthermore, because it is hand-held by employees, it is difficult to ensure the consistency of the engraving position. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a manual three-axis displacement pneumatic engraving device, solving the problem mentioned in the background section that requires employees to hand-hold the pneumatic engraving machine. Because the pneumatic engraving machine is heavy, it is difficult for employees to operate, resulting in low efficiency and impacting overall production line capacity. Furthermore, prolonged operation places a heavy burden on employees, easily leading to fatigue. Moreover, during pneumatic engraving, the machine generates a recoil force, causing instability in the employee's hand, ultimately resulting in unclear engraved production line numbers. Additionally, because it is hand-held by the employee, it is difficult to ensure the consistency of the engraving position.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a manual three-axis displacement pneumatic engraving device, comprising: an assembly line, an internal tray, a three-axis displacement base, an engine block, a pneumatic engraving machine, an engraving positioning fixture, a trapezoidal lead screw, an engraving Z-axis displacement guide rail, a handle-type guide rail holder, an engraving Y-axis displacement guide rail, and an engraving X-axis displacement guide rail; the internal tray is slidably mounted on the assembly line for carrying the engine block along the assembly line; the three-axis displacement base is fixedly disposed on the side of the assembly line, and the engraving X-axis displacement guide rail and the engraving Z-axis displacement guide rail are orthogonally mounted on the three-axis displacement base, with the trapezoidal lead screw internally mounted. Inside the Z-axis positioning guide rail, the trapezoidal lead screw is equipped with a self-locking thread structure to lock the Z-axis lifting height to counteract the downward fall of the pneumatic engraving machine due to its own weight; the Y-axis positioning guide rail is slidably mounted on the bracket formed by the X-axis and Z-axis positioning guide rails; the pneumatic engraving machine is rigidly fixed to the front end of the Y-axis positioning guide rail by the engraving positioning fixture; the three-axis positioning base as a whole bears the reverse vibration force generated by the operation of the pneumatic engraving machine and isolates the vibration from being transmitted to the operator; the X-axis, Y-axis, and Z-axis positioning guide rails are all equipped with handle-type guide rail holders, which lock the sliding displacement of each axis by rotating the handle.

[0006] In the above embodiments, the engraving action is performed by a pneumatic engraving machine. During operation, the internal impact pin impacts the surface of the engine cylinder block at high frequency to engrave the production line number. In the traditional handheld solution, the impact and shock force is directly transmitted to the worker's hand. In this device, the vibration force is transmitted and dissipated layer by layer through the engraving positioning fixture → engraving Y-axis displacement guide rail → X / Z-axis displacement guide rail → three-axis displacement base. There is no hand-buffered vibration, the impact trajectory of the impact pin is stable, and the engraved characters are uniform in depth and have clear edges.

[0007] According to the above technical solution, the engraving positioning fixture is provided with mounting holes for matching the pneumatic engraving machine. The pneumatic engraving machine is completely locked in the engraving positioning fixture by bolts, realizing a rigid integrated connection between the engraving machine and the three-axis mechanism. The lead of the trapezoidal lead screw self-locking thread is less than the thread pitch diameter. It relies on thread friction to self-lock, and can maintain the Z-axis height unchanged for a long time without the need for continuous clamping.

[0008] In the above embodiment, due to gravity, the Z-axis displacement is adjusted by a trapezoidal lead screw. The trapezoidal lead screw has a self-locking characteristic and will not fall due to its own weight after rotation.

[0009] The guide sliders of the Z-axis, Y-axis, and X-axis engraving guide rails are all equipped with independent handle-type guide rail holders, and the handle-type guide rail holders have a clamping structure inside.

[0010] In the above embodiment, the engine block is moved along the production line on the internal tray to the failure marking station. The employee has in advance fixed the pneumatic marking machine onto the three-axis positioner using the marking positioning fixture. According to the model of the engine block, the X-axis marking guide rail and the Z-axis marking guide rail are manually adjusted. The marking position is confirmed by the pointer and indicator scale in each adjustment direction. Then the handle-type guide rail holder is tightened to fix the marking position.

[0011] According to the above technical solution, the manual three-axis displacement pneumatic engraving device further includes: a pointer and an indicator scale; the pointer and the indicator scale are both fixedly installed on the engraving X-axis displacement guide rail and the engraving Z-axis displacement guide rail, and millimeter-level coordinate positioning is achieved by the cooperation of the pointer and the indicator scale.

[0012] According to the above technical solution, the scale division value of the pointer and the indicator scale is ≤1mm, which realizes millimeter-level precise calibration of the X and Z axis marking coordinates.

[0013] In the above embodiments, the marking position is confirmed by the pointer and the indicator scale in each adjustment direction. When adjusting the X / Z axis position, the pointer moves with the slider and can be directly read by aligning with the corresponding scale on the indicator scale.

[0014] According to the above technical solution, the manual three-axis displacement pneumatic engraving device further includes: an engraving limit rod; the engraving limit rod is detachably installed on the three-axis displacement base, and the engraving limit rod is arranged along the feed direction of the engraving Y-axis displacement guide rail to limit the forward limit stroke of the pneumatic engraving machine and avoid overtravel impact on the engine cylinder.

[0015] According to the above technical solution, the marking limit rod can be adjusted laterally along the three-axis displacement base to adapt to the Y-axis marking feed stroke of engine cylinder blocks with different external dimensions.

[0016] In the above embodiments, when the Y-axis displacement guide rail is pushed forward, the end face of the slider will abut against the limiting rod, forcibly limiting the maximum forward distance of the Y-axis.

[0017] According to the above technical solution, the engine block assembly station is independently equipped with a three-axis displacement base, a Z-axis displacement guide rail for engraving, a handle-type guide rail holder, a pointer, a Y-axis displacement guide rail for engraving, an X-axis displacement guide rail for engraving, an indicator scale, and an engraving limit rod; so that a single pneumatic engraving machine can be disassembled and switched to engraving positioning fixtures for different stations to achieve multi-station sharing.

[0018] In the above embodiments, since the same type of engine cylinder block is continuously produced and assembled during production, when the next engine cylinder block is stamped with the serial number, it is only necessary to push / pull the pneumatic stamping machine back and forth, then lock / release the handle-type guide rail holder, and press the start button to achieve high-efficiency and high-quality stamping of the engine serial number.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. In this invention, the three-axis displacement mechanism as a whole bears the weight of the pneumatic engraving machine and the engraving counter-vibration force, eliminating the need for manual continuous holding of heavy objects, greatly reducing the labor intensity of workers, reducing fatigue, improving emergency engraving efficiency, and ensuring the production capacity of the entire production line.

[0020] 2. In this invention, the engraving vibration is absorbed by the rigid base, eliminating the shaking caused by manual handling, resulting in clear and complete engraved characters and stable engraving quality.

[0021] 3. In this invention, millimeter-level precise positioning is achieved through pointers and scales, positioning parameters of cylinders of the same model can be locked at once, the stamping position height is uniform, and the consistency of product appearance is greatly improved.

[0022] 4. In this invention, the structure consists only of guide rail, lead screw, clamp and base. The structure is simple and the manufacturing cost is far lower than that of fully automatic engraving equipment. Multiple workstations share a single pneumatic engraving host, which further reduces equipment procurement costs.

[0023] 5. In this invention, the pure manual push-pull adjustment is simple and convenient to operate, requires no electrical automation control, has a low failure rate, and is highly reliable as an emergency backup tool. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the planar portion of the present invention; Figure 3 This is a schematic diagram of the structure at the position of the trapezoidal lead screw and the engraved Z-axis displacement guide rail of the present invention; Figure 4 For the present invention Figure 3 Enlarged schematic diagram of part A of the structure; Figure 5 This is a schematic diagram of the structure at the position of the engine block and the internal tray of the present invention; Figure 6 This is a schematic diagram of the handle-type guide rail holder and the position of the indicator scale of the present invention.

[0025] The meanings of the labels in the diagram are as follows: 1. Assembly line body; 2. Internal tray; 3. Three-axis positioner base; 4. Engine cylinder block; 5. Pneumatic engraving machine; 6. Engraving positioning fixture; 7. Trapezoidal lead screw; 8. Engraving Z-axis positioner guide rail; 9. Handle-type guide rail holder; 10. Pointer; 11. Engraving Y-axis positioner guide rail; 12. Engraving X-axis positioner guide rail; 13. Indicating scale; 14. Engraving limit rod. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] Example 1: Please see Figures 1-6 One embodiment of the present invention is: a manual three-axis displacement pneumatic engraving device, comprising: a production line body 1, an internal tray 2, a three-axis displacement base 3, an engine cylinder block 4, a pneumatic engraving machine 5, an engraving positioning fixture 6, a trapezoidal lead screw 7, an engraving Z-axis displacement guide rail 8, a handle-type guide rail holder 9, an engraving Y-axis displacement guide rail 11, and an engraving X-axis displacement guide rail 12; the internal tray 2 is slidably mounted on the production line body 1 for carrying the engine cylinder block 4 along the production line; the three-axis displacement base 3 is fixedly disposed on the side of the production line body 1, and the engraving X-axis displacement guide rail 12 and the engraving Z-axis displacement guide rail 8 are orthogonally mounted on the three-axis displacement base 3, and the trapezoidal lead screw 7 is internally mounted. The trapezoidal lead screw 7, fitted inside the Z-axis positioning guide rail 8, has a self-locking thread structure to lock the Z-axis lifting height to counteract the downward fall of the pneumatic engraving machine 5 due to its own weight. The Y-axis positioning guide rail 11 is slidably mounted on the bracket formed by the X-axis positioning guide rail 12 and the Z-axis positioning guide rail 8. The pneumatic engraving machine 5 is rigidly fixed to the front end of the Y-axis positioning guide rail 11 by the engraving positioning fixture 6. The three-axis positioning base 3 as a whole bears the reverse vibration force generated by the operation of the pneumatic engraving machine 5 and isolates the vibration from being transmitted to the operator. The X-axis positioning guide rail 12, the Y-axis positioning guide rail 11, and the Z-axis positioning guide rail 8 are all equipped with handle-type guide rail clamps 9, which lock the sliding displacement of each axis by rotating the handle.

[0028] In the above embodiments, the three-axis displacement mechanism bears the weight of the pneumatic engraving machine 5 and the engraving counter-vibration force, eliminating the need for manual continuous holding of heavy objects, greatly reducing the labor intensity of workers, reducing fatigue, improving emergency engraving efficiency, and ensuring the production capacity of the entire production line.

[0029] The marking and positioning fixture 6 has mounting holes for matching the pneumatic marking machine 5. The pneumatic marking machine 5 is completely locked in the marking and positioning fixture 6 by bolts, realizing a rigid integrated connection between the marking machine and the three-axis mechanism. The lead of the trapezoidal lead screw 7 is smaller than the thread pitch diameter. It relies on thread friction to self-lock, and can maintain the Z-axis height unchanged for a long time without the need to continuously tighten the clamp.

[0030] The guide sliders of the Z-axis displacement guide rail 8, the Y-axis displacement guide rail 11, and the X-axis displacement guide rail 12 are all equipped with independent handle-type guide rail holders 9, and the handle-type guide rail holders 9 have a clamping structure inside.

[0031] In the above embodiments, the gripper has a clamping structure inside; rotating the handle clockwise: the clamping clamps the guide rail profile, locking the current position of the slider, and all three axes are locked, so the position will not shift during the engraving process; releasing the handle counterclockwise: the clamping clamps are released, and the slider can slide freely to adjust the coordinates; independent locking logic for each axis: the X and Z axes are locked after adjustment, maintaining the calibrated coordinates throughout the process; only the Y axis is released, pushed, pulled, and then locked before and after a single engraving, greatly reducing the amount of repetitive adjustment work.

[0032] The manual three-axis displacement pneumatic engraving device also includes: pointer 10 and indicator scale 13; pointer 10 and indicator scale 13 are both fixedly installed on the engraving X-axis displacement guide rail 12 and the engraving Z-axis displacement guide rail 8, and millimeter-level coordinate positioning is achieved by the cooperation of pointer 10 and indicator scale 13.

[0033] The scale division of pointer 10 and indicator scale 13 is ≤1mm, enabling millimeter-level precise calibration of X and Z axis marking coordinates.

[0034] In the above embodiments, millimeter-level precise positioning is achieved through pointer 10 and scale 13, positioning parameters of cylinders of the same model can be locked at one time, the stamping position height is uniform, and the product appearance consistency is greatly improved.

[0035] The manual three-axis displacement pneumatic engraving device also includes: an engraving limit rod 14; the engraving limit rod 14 is detachably installed on the three-axis displacement base 3, and the engraving limit rod 14 is arranged along the feed direction of the engraving Y-axis displacement guide rail 11 to limit the forward limit stroke of the pneumatic engraving machine 5 and avoid overtravel impact on the engine cylinder 4.

[0036] The marking limit rod 14 can be adjusted laterally along the three-axis displacement base 3 to finely adjust its installation position, adapting to the Y-axis marking feed stroke of engine cylinder blocks 4 with different external dimensions.

[0037] In the above embodiments, the distance between the stamping machine's striker and the cylinder surface can be kept constant, avoiding excessive manual pushing force that could cause the stamping machine to overtravel and impact the cylinder. At the same time, the feed depth of each stamping is standardized, further improving the consistency of the stamping. The limit rod can be finely adjusted on the base to adapt to different cylinder thicknesses.

[0038] The engine block 4 assembly station is independently equipped with a three-axis displacement base 3, a Z-axis engraving displacement guide rail 8, a handle-type guide rail holder 9, a pointer 10, a Y-axis engraving displacement guide rail 11, an X-axis engraving displacement guide rail 12, an indicator scale 13, and an engraving limit rod 14; so that a single pneumatic engraving machine 5 can be disassembled and switched to engraving positioning fixtures 6 at different stations to achieve multi-station sharing.

[0039] In the above embodiments, each production line station can be individually equipped with a three-axis displacement base, guide rail, scale, clamp, and limit rod consisting of a displacement bracket; the pneumatic engraving machine can be detached and installed through the engraving positioning fixture, and can be disassembled from one station bracket and assembled to another station bracket. A single engraving machine head can be used with multiple displacement mechanisms, eliminating the need for each station to be equipped with a separate pneumatic engraving machine. The equipment can be reused by relying on the split and detachable structure, reducing the cost of purchasing spare equipment.

[0040] In this embodiment, when the automatic pneumatic marking equipment fails during engine assembly, manual marking is required.

[0041] The three-axis positioning base 3 is the rigid mounting base for the entire positioning mechanism. It is fixed to the ground beside the production line 1 and is formed by welding thick steel plates. It has high rigidity and mass, providing strong vibration damping. After high-frequency impact vibration is transmitted to the base, the base's own weight and the deformation of the steel plate structure buffer the vibration energy, converting it into heat dissipation, preventing overall resonance and slight displacement. All guide rails are integrated on the three-axis positioning base 3. The impact vibration generated during engraving is ultimately transmitted to the three-axis positioning base 3 and absorbed by the ground, replacing manual support. The engine block 4, on the internal tray 2, is moved along the production line 1 to the failed engraving station. Employees pre-install the pneumatic engraving machine 5 onto the three-axis positioning base using the engraving positioning fixture 6. On the positioning device, according to the model of engine block 4, the X-axis and Z-axis positioning guide rails 12 and 8 are manually adjusted for marking. The marking position is confirmed by the pointer 10 and the indicator scale 13 in each adjustment direction. When adjusting the X / Z axis position, the pointer 10 moves with the slider. By aligning with the corresponding scale on the indicator scale 13, the current three-dimensional coordinates can be read intuitively. Different models of engine block 4 correspond to fixed scale values. The scale is recorded when the new machine is first adjusted, and subsequent production of the same model is directly adjusted to this scale to achieve standardized millimeter-level precise positioning. This eliminates the error problem of manual positioning without scale and by feel, ensuring that the marking points of all cylinder blocks are completely consistent. Then, the handle-type guide rail holder 9 is tightened to fix the marking position, and the Z-axis positioning guide rail 8 is marked. Both the Y-axis and X-axis positioning guide rails 11 and 12 are equipped with independent handle-type guide rail clamps 9, which have a clamping structure inside. Rotating the handle clockwise clamps the guide rail profile, locking the slider's current position and locking all three axes, preventing position shift during engraving. Rotating the handle counterclockwise releases the clamp, allowing the slider to slide freely and adjust its coordinates. The independent locking logic for each axis ensures that the X and Z axes are locked after adjustment, maintaining the calibrated coordinates throughout the process. Only the Y-axis requires loosening, pushing, pulling, and re-locking before and after a single engraving operation, significantly reducing repetitive adjustment work. Due to gravity, the Z-axis positioning is adjusted via a trapezoidal screw 7. The trapezoidal thread of the screw 7 has a large friction angle, allowing for height adjustment only when the screw is manually rotated. Rotation stops when the screw is stopped. Afterwards, the friction force of the threaded contact surface is greater than the downward weight of the pneumatic engraving machine 5. When there is no external force clamping, the Z-axis slider will not fall downward due to the weight of the equipment. There is no need to continuously lock the clamp to maintain the height, which solves the defect of the pure guide rail slider sliding down due to its own weight. After the position adjustment is completed, the employee holds the handle and pushes the pneumatic engraving machine 5 forward, so that the pneumatic engraving machine 5 moves in the direction of the engraving Y-axis displacement guide rail 11. Different engine cylinders 4 use corresponding engraving limit rods 14 to limit the pneumatic engraving machine 5 in the Y-axis direction, ensuring that the distance between the impact pin of the pneumatic engraving machine 5 and the surface of the engine cylinder 4 is constant, avoiding excessive manual pushing force that causes the engraving machine to overtravel and hit the engine cylinder 4. At the same time, the feed depth of each engraving is uniform, further improving the engraving consistency.The limit rod 14 can be finely adjusted on the base to adapt to different cylinder block thicknesses. After the pneumatic engraving machine 5 is in place, the handle-type guide rail holder 9 is manually rotated to fix and clamp it. Finally, the start button is manually pressed to engrave the engine serial number. After engraving is completed, the holder on the engraving Y-axis displacement guide rail 11 is released, and the engraving Y-axis displacement guide rail 11 is pulled backward away from the engine cylinder block 4 to complete the reset and wait for the next engine cylinder block 4 to be delivered. In this case, the X and Z axes always maintain their original calibrated positions and do not need to be repeatedly adjusted. Because the same type of engine cylinder block 4 will be produced and assembled continuously during production, the next engine cylinder block 4 will be delivered. When engraving the production line number, simply push / pull the pneumatic engraving machine 5 back and forth, then lock / release the handle-type guide rail clamp 9, and press the start button to achieve high-efficiency and high-quality engraving of the engine production line number. Furthermore, each production line station can be individually equipped with a three-axis displacement base, guide rail, scale, clamp, and limit rod, forming a displacement bracket. The pneumatic engraving machine 5 is detachable and installable via the engraving positioning fixture 6, allowing it to be disassembled from one station bracket and assembled to another. A single engraving head can be used with multiple displacement mechanisms, eliminating the need for a separate engraving machine at each station. The modular, detachable structure enables equipment reuse, reducing the cost of purchasing spare equipment.

[0042] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0043] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A manual three-axis displacement pneumatic engraving device, characterized in that, The manual three-axis displacement pneumatic engraving device includes: a production line body (1), an internal tray (2), a three-axis displacement base (3), an engine cylinder (4), a pneumatic engraving machine (5), an engraving positioning fixture (6), a trapezoidal lead screw (7), an engraving Z-axis displacement guide rail (8), a handle-type guide rail holder (9), an engraving Y-axis displacement guide rail (11), and an engraving X-axis displacement guide rail (12). The inner tray (2) is slidably mounted on the assembly line body (1) to carry the engine cylinder block (4) along the assembly line for transport. The three-axis displacement base (3) is fixedly installed on the side of the production line body (1). The X-axis displacement guide rail (12) and the Z-axis displacement guide rail (8) are orthogonally installed on the three-axis displacement base (3). The trapezoidal lead screw (7) is internally assembled inside the Z-axis displacement guide rail (8). The engraving Y-axis displacement guide rail (11) is slidably mounted on the bracket formed by the engraving X-axis displacement guide rail (12) and the engraving Z-axis displacement guide rail (8); The pneumatic engraving machine (5) is rigidly fixed to the engraving Y-axis displacement guide rail (11) by the engraving positioning fixture (6); The three-axis displacement base (3) as a whole bears the reverse vibration force generated by the pneumatic engraving machine (5) during operation, and isolates the vibration from being transmitted to the operator; The X-axis displacement guide rail (12), the Y-axis displacement guide rail (11), and the Z-axis displacement guide rail (8) are all equipped with handle-type guide rail clamps (9), which lock the sliding displacement of each axis by rotating the handle.

2. The manual three-axis displacement pneumatic engraving device according to claim 1, characterized in that: The engraving positioning fixture (6) is provided with mounting holes for matching the pneumatic engraving machine (5). The pneumatic engraving machine (5) is completely locked in the engraving positioning fixture (6) by bolts, so as to realize the rigid integrated connection between the engraving machine and the three-axis mechanism. The lead of the self-locking thread of the trapezoidal lead screw (7) is smaller than the thread pitch diameter. It relies on thread friction to self-lock and can maintain the Z-axis height unchanged for a long time without the need for continuous clamping.

3. The manual three-axis displacement pneumatic engraving device according to claim 2, characterized in that: The guide sliders of the Z-axis displacement guide rail (8), the Y-axis displacement guide rail (11), and the X-axis displacement guide rail (12) are all equipped with independent handle-type guide rail clamps (9), and the handle-type guide rail clamps (9) have a clamping structure inside.

4. The manual three-axis displacement pneumatic engraving device according to claim 3, characterized in that: The manual three-axis displacement pneumatic engraving device also includes: a pointer (10) and an indicator scale (13); The pointer (10) and the indicator scale (13) are both fixedly installed on the X-axis displacement guide rail (12) and the Z-axis displacement guide rail (8). Millimeter-level coordinate positioning is achieved by the cooperation of the pointer (10) and the indicator scale (13).

5. The manual three-axis displacement pneumatic engraving device according to claim 4, characterized in that: The scale division of the pointer (10) and the indicator scale (13) is ≤1mm, so as to achieve millimeter-level accurate calibration of the X and Z axis marking coordinates.

6. The manual three-axis displacement pneumatic engraving device according to claim 5, characterized in that: The manual three-axis displacement pneumatic engraving device also includes: an engraving limit rod (14). The engraving limit rod (14) is detachably installed on the three-axis displacement base (3). The engraving limit rod (14) is arranged along the feed direction of the engraving Y-axis displacement guide rail (11) to limit the forward limit of the pneumatic engraving machine (5) and avoid overtravel impact on the engine cylinder (4).

7. The manual three-axis displacement pneumatic engraving device according to claim 6, characterized in that: The engraving limit rod (14) can be adjusted laterally along the three-axis displacement base (3) to adapt to the Y-axis engraving feed stroke of engine cylinder blocks (4) with different external dimensions.

8. The manual three-axis displacement pneumatic engraving device according to claim 7, characterized in that: The engine block (4) assembly station is independently equipped with a three-axis displacement base (3), a Z-axis displacement guide rail (8), a handle-type guide rail holder (9), a pointer (10), a Y-axis displacement guide rail (11), an X-axis displacement guide rail (12), an indicator scale (13), and a displacement limit rod (14). This allows a single pneumatic engraving machine (5) to be disassembled and switched to engraving positioning fixtures (6) at different workstations, enabling multi-workstation sharing.

Images