An angular positioning device and method for a gear component

Abstract

This invention relates to the field of laser marking auxiliary equipment, and provides an angular positioning device and method for gear components. The device includes: a mounting base connected to the worktable of a marking machine; an adjusting seat mounted on the mounting base and equipped with a linear guide structure; a circumferential limiting member slidably connected to the linear guide structure and configured to move to a preset position so that the working surface fits against the outer contour of the gear component to form an angular constraint; and a radial positioning member mounted on the mounting base and capable of being inserted into the weight-reducing hole of the gear component to achieve radial positioning. This invention achieves rapid and accurate angular positioning by utilizing the weight-reducing hole and outer contour of the gear itself through the synergistic action of the radial positioning member and the circumferential limiting member, and is adaptable to various specifications of gear components.

Description

Technical Field

[0001] This invention belongs to the field of laser marking auxiliary equipment, and provides an angular positioning device and angular positioning method for gear parts. Background Technology

[0002] During gear manufacturing, laser marking is typically performed on the gear surface to indicate information such as model and specifications. For gears with a ring of evenly distributed weight-reducing holes, the marking position usually needs to be precisely positioned on the surface between two adjacent weight-reducing holes, which places high demands on the angular positioning accuracy of the marking.

[0003] Existing technologies mainly include two types: one is fixed-structure marking fixtures, which are rigid integrated designs that can only be used with a single gear specification. When changing different workpieces, the entire fixture needs to be replaced, resulting in high costs and low efficiency. The other is manually assisted adjustable fixtures, which have certain adjustment functions, but angular positioning relies on the operator's visual judgment and repeated adjustments with external measuring tools. This results in problems such as poor positioning accuracy, low consistency, and cumbersome operation, and can easily lead to misalignment or skewness in marking. Summary of the Invention

[0004] To solve the above-mentioned technical problems, the present invention provides an angular positioning device and an angular positioning method for gear components, which can utilize the gear's own weight reduction hole and outer contour for coordinated positioning, and combine a multi-dimensional adjustment structure to adapt to the rapid and accurate angular positioning of gear components of various specifications.

[0005] The technical solution of the present invention includes a mounting base connected to the worktable of a marking machine. The mounting base is provided with a positioning assembly, which includes: an adjusting seat mounted on the mounting base, the adjusting seat having a linear guide structure whose guiding direction is parallel to the mounting base; a circumferential limiting member slidably connected to the linear guide structure, the circumferential limiting member being configured to move along the linear guide structure to a preset position so that the working surface of the circumferential limiting member fits against the outer contour of the gear component, forming an angular constraint on the gear component; and a radial positioning member mounted on the mounting base, the radial positioning member being able to insert into the weight-reducing hole of the gear component to achieve radial positioning of the gear component. The circumferential limiting member and the radial positioning member work together, using the radial limiting of the radial positioning member as a reference and the outer circle of the circumferential limiting member fitting to form a circumferential constraint, so that the surface between two adjacent weight-reducing holes on the gear component is aligned with the marking area.

[0006] The above scheme establishes a radial reference by inserting a radial positioning component into a weight reduction hole, while using a circumferential limiting component to conform to the outer contour to form an angular constraint. The synergistic effect of the two eliminates the residual degree of freedom of single-dimensional positioning, thereby achieving rapid and accurate angular positioning of the gear component.

[0007] Optionally, the linear guide structure is a long strip-shaped positioning and adjusting groove extending along the adjusting direction of the slider on the adjusting seat, and the circumferential limiting member is a slider, one end of which is slidably connected to the positioning and adjusting groove.

[0008] Optionally, a fastening screw is also included to secure the slider to the adjusting seat, thereby limiting the slider's movement.

[0009] Optionally, it also includes a first positioning pin. The slider has a first opening, and the adjusting seat has a plurality of grooves along the adjusting direction of the slider. The first positioning pin passes through the first opening and is inserted into the grooves to restrict the slider from sliding.

[0010] Optionally, the linear guide structure is a lead screw assembly, the circumferential limiting member is a long strip-shaped connecting block, and the connecting block is connected to the nut of the lead screw assembly.

[0011] Optionally, the mounting base has a plurality of sockets arrayed on it, and the bottom of the adjustment seat is provided with at least two pins, which match the sockets to mount the adjustment seat on the mounting base.

[0012] Optionally, the radial positioning element is a second positioning pin, which includes a insertion section and a positioning section. The outer diameter of the insertion section matches the inner diameter of the insertion hole, and the outer diameter of the positioning section matches the inner diameter of the weight reduction hole.

[0013] Optionally, the second locating pin may be available in several sizes to accommodate various sizes of weight-reducing holes.

[0014] Furthermore, the present invention also provides a method for angular positioning of a gear component, using the angular positioning device for a gear component as described above, comprising: mounting the adjusting seat and the radial positioning component on a mounting base plate; aligning the weight reduction hole of the gear component with the radial positioning component to radially position the gear component; adjusting the position of the gear component so that the gear surface between two adjacent weight reduction holes is located in the marking area; sliding the circumferential limiting component along the linear guide structure so that the working surface of the circumferential limiting component fits against the outer contour of the gear component, forming an angular constraint on the gear component, thereby completing the angular positioning of the gear component.

[0015] The technical solution provided by this invention has the following advantages compared with the prior art: This invention, by incorporating an adjusting seat, a linear guide structure, and a slidingly connected circumferential limiting component, in conjunction with a radial positioning component and a weight-reducing hole, solves the problem of fixed fixtures in the prior art only being compatible with a single specification. The circumferential limiting component can move along the linear guide structure to different preset positions to accommodate gears of different outer diameters, addressing the issue of poor accuracy in manual positioning. The synergistic action of the radial positioning component and the circumferential limiting component, with radial reference and outer circle contact forming a double constraint, ensures precise alignment of the surfaces between adjacent weight-reducing holes with the marking area. Thus, without replacing the entire fixture, rapid and accurate angular positioning of gears of multiple specifications is achieved, significantly improving positioning accuracy and operational efficiency. Other advantages, objectives and features of the present invention will become apparent in part from the following description, and in part from those skilled in the art through study and practice of the invention. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the gear angular positioning device according to one embodiment of the present invention. Figure 1 .

[0018] Figure 2 This is a schematic diagram of the gear angular positioning device according to one embodiment of the present invention. Figure 2 .

[0019] Figure 3 This is a schematic diagram of the circumferential limiting member structure according to one embodiment of the present invention.

[0020] Figure label: 10. Mounting base plate; 20. Adjustment seat; 30. Circumferential limiting component; 40. Radial positioning component; 50. Gear component. Detailed Implementation

[0021] The following detailed description of a specific embodiment of the present invention is provided in conjunction with the accompanying drawings. However, it should be understood that the scope of protection of the present invention is not limited to the specific embodiment.

[0022] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the technical solution of this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0023] In the description of the embodiments of the present invention, unless otherwise stated, "a plurality of" means two or more.

[0024] Example 1 like Figures 1 to 3 As shown, this embodiment provides an angular positioning device for a gear component, including a mounting base 10 connected to the worktable of a marking machine. The mounting base 10 serves as the supporting foundation for the entire positioning device. It is not limited to a rectangular plate; it can be designed as a circle, irregular shape, or other adaptable form according to the actual interface shape of the worktable, as long as a stable mounting surface can be provided. The mounting base 10 is provided with positioning components, including an adjusting seat 20, a circumferential limiting member 30, and a radial positioning member 40.

[0025] An adjusting seat 20 is mounted on the mounting base 10, and the adjusting seat 20 is provided with a linear guide structure. Specifically, the linear guide structure is used to limit the movement trajectory of the circumferential limiting member 30, so that its position can only be adjusted along a preset straight path. In this embodiment, the linear guide structure is a functional overarching concept, and its specific implementation can be a variety of mechanical structures that can constrain linear motion, such as a slide, guide rail, lead screw pair, or cylinder guide rod, and is not limited to a specific guiding method. This overarching generalization ensures that no matter what specific linear motion mechanism is used, as long as it achieves the function of guiding the circumferential limiting member 30 to move along a straight line to a preset position, it falls within the protection scope of this invention.

[0026] The circumferential limiting member 30 is slidably connected to the linear guide structure. The circumferential limiting member 30 is configured to move along the linear guide structure to a preset position so that its working surface fits against the outer contour of the gear component 50, forming an angular constraint on the gear component 50. Specifically, the working surface of the circumferential limiting member 30 is the interface that directly contacts and constrains the surface of the gear component 50. When the circumferential limiting member 30 moves along the linear guide structure and abuts against the outer contour of the gear component 50, this working surface restricts the rotational freedom of the gear component 50 about its own axis. It should be understood that although the figure shows the circumferential limiting member 30 located on one side of the gear component 50, in other embodiments, the circumferential limiting member 30 can also be located in other positions on the gear component 50, or multiple circumferential limiting members 30 can be provided to fit simultaneously from different directions, as long as the rotational freedom of the gear component 50 can be restricted through linear movement.

[0027] A radial positioning element 40 is mounted on the mounting base plate 10. The radial positioning element 40 can be inserted into the weight-reducing hole of the gear component 50 to achieve radial positioning of the gear component 50. Specifically, the radial positioning element 40 utilizes the inherent weight-reducing hole of the gear component 50 as a positioning reference, and determines the rotation center of the gear component 50 in the plane of the mounting base plate 10 through a shaft-hole fit. This design cleverly utilizes the structural features of the workpiece itself, avoiding the increased cost of designing additional special fixtures, while also ensuring the consistency between the positioning reference and the design reference, thereby improving positioning accuracy.

[0028] The circumferential limiting component 30 and the radial positioning component 40 work together. Using the radial limiting of the radial positioning component 40 as a reference and the outer circle of the circumferential limiting component 30 as a contact point, a circumferential constraint is formed, ensuring that the surface between two adjacent weight-reducing holes on the gear component 50 is aligned with the marking area. The physical essence of this synergistic effect lies in the complete constraint of degrees of freedom: the radial positioning component 40 first eliminates the translational degrees of freedom of the gear component 50 in the X and Y axes, establishing a unique center of rotation; subsequently, the circumferential limiting component 30, through linear movement and contact with the outer contour, eliminates the rotational degree of freedom of the gear component 50 around the Z axis. Both are indispensable. If there is only radial positioning without circumferential limiting, the gear component 50 can still rotate arbitrarily around the center, failing to guarantee the angular accuracy of the marking position; if there is only circumferential limiting without radial positioning, although the gear component 50 cannot rotate, its overall position may shift, causing the marking area to deviate from the target surface. Therefore, this embodiment transforms the abstract "angular positioning" into a repeatable mechanical action through the above-mentioned collaborative mechanism, which can achieve rapid and accurate positioning of gear component 50 without repeated manual alignment. Moreover, this positioning principle does not depend on specific guiding or locking methods, and has wide applicability and defensive capabilities.

[0029] Example 2 In this embodiment, the cooperation relationship between the linear guide structure and the circumferential limiting member is described in detail. The linear guide structure is an elongated positioning and adjusting groove extending along the adjusting direction of the circumferential limiting member 30 on the adjusting seat 20. The circumferential limiting member 30 is a slider, one end of which is slidably connected to the positioning and adjusting groove. Specifically, as follows... Figure 1 As shown, the positioning adjustment groove is a through or semi-through groove machined on the horizontal extension of the adjustment seat 20. Its length direction is the adjustment direction of the circumferential limiting member 30 towards or away from the gear member 50. One end of the slider is embedded in the positioning adjustment groove to form a sliding pair. The sidewall of the groove restricts the slider's translational freedom perpendicular to the adjustment direction and its rotational freedom about the vertical axis, retaining only the linear freedom of movement along the length of the groove. It should be understood that although the positioning adjustment groove shown in the figure is a rectangular cross-section straight groove, in other embodiments, the groove can also adopt irregular cross-sections such as dovetail grooves, T-grooves, or V-grooves, as long as it can constrain the slider to slide smoothly along a predetermined trajectory. Similarly, "long strip" is not limited to a strictly straight segment. When adapting to workpieces with special shapes, it can also be designed as an arc-shaped long groove with a certain curvature, all of which fall within the protection scope of this invention.

[0030] To achieve the fixation of the circumferential limiting component 30 at a preset position, this embodiment provides two specific locking methods. The first method is friction locking. The device also includes a fastening screw, which fastens the slider to the adjusting seat 20 to restrict the slider's movement. Specifically, the slider has a threaded through hole, and the bottom or side of the positioning adjustment groove of the adjusting seat 20 has a corresponding threaded hole or smooth hole. The fastening screw passes through the slider and screws into the adjusting seat 20, applying axial pressure to the slider through the screw head or washer, and using the static friction between the contact surfaces to achieve position locking. The advantage of this method is that it can achieve stepless adjustment. The operator can precisely push the slider to any fitting position and then lock it according to the actual outer contour size of the gear component 50, making it highly adaptable. The fastening screw can be an internal hexagonal head screw, an external hexagonal bolt, or a wing screw, etc. Wing screws are preferred for easy manual quick assembly and disassembly, improving efficiency during model changeover without the need for tools.

[0031] The second method is discrete gear locking. The device also includes a first positioning pin. The slider has a first opening, and the adjusting seat 20 has several grooves along the adjustment direction of the slider. The first positioning pin passes through the first opening and inserts into the groove to restrict the slider's movement. Specifically, multiple grooves are arranged at intervals along the length of the positioning adjustment groove to form a series of preset positioning positions. When the slider moves to the target position, the first opening aligns with the corresponding groove, and the first positioning pin is inserted to form mechanical interference, thereby rigidly restricting the slider's displacement. The advantage of this method is that it has a certain repeatability of positioning accuracy, which is particularly suitable for mass production of gear parts 50 of the same specification. Operators do not need to re-align the mating position each time; they only need to insert the pin into the corresponding gear to reproduce the previous adjustment state, significantly reducing human error. The spacing of the grooves can be equal, such as one every 5mm or 10mm, or it can be an unequal sequence set according to common gear specifications. The first positioning pin can be a spring plunger, a ball-head positioning pin, or a common cylindrical pin, preferably a spring plunger to achieve self-locking and anti-disengagement.

[0032] It should be noted that the two locking methods described above can be implemented independently or used in combination on the same device. For example, when initially debugging the new specification gear 50, the fastening screws are first loosened for stepless fine-tuning to the optimal fit position, and then the screws are tightened to fix it. In subsequent mass production, if the screws are found to have shifted position due to vibration, a first locating pin can be added as an auxiliary safety measure, or a groove can be machined at the corresponding position to use a pin for positioning. Regardless of the specific locking method used, the core purpose is to ensure that the circumferential limiting component 30 can reliably remain stationary after moving to the preset position, thereby ensuring the stability and consistency of the angular constraint on the gear 50.

[0033] Example 3 In one parallel implementation, the linear guide structure is a lead screw assembly, and the circumferential limiting member 30 is an elongated connecting block connected to the nut of the lead screw assembly. Specifically, the lead screw assembly typically includes a lead screw rotatably supported on the adjusting seat 20 and a nut threadedly engaged with the lead screw. The connecting block is fixedly connected to the nut and moves linearly along the axis of the lead screw with the nut. In this structure, the connecting block acts as the circumferential limiting member 30, and its working surface is also used to conform to the outer contour of the gear component 50 to form an angular constraint. It should be understood that although this embodiment specifies the circumferential limiting member 30 as an elongated connecting block, this is only a preferred form to adapt to the lead screw drive layout. In other variations, the connecting block can also be designed as an L-shaped, T-shaped, or other geometric shape that can stably bear load and reliably connect with the nut, as long as it has a working surface that mates with the outer contour of the gear component 50.

[0034] Unlike the sliding groove guide friction locking or pin locking method used in Embodiment 2, this embodiment utilizes the mechanical characteristics of the lead screw drive to achieve a differentiated technical effect. The lead screw assembly converts rotational motion into linear motion through a helical pair. When the helix angle of the lead screw is less than the friction angle, the mechanism naturally possesses a self-locking function. That is, after stopping the rotation of the lead screw, the connecting block can remain stationary under axial load without reverse sliding. This means that when angularly positioning the gear 50, the operator does not need to tighten the fastening screw or insert the positioning pin to lock the position after adjustment, as in Embodiment 2. This simplifies the operation process and eliminates the risk of slight displacement caused by uneven locking force. At the same time, the lead screw drive has a large reduction ratio. A large angle of rotation of the handwheel or knob corresponds only to a small linear displacement of the connecting block. This makes the fine adjustment of the position of the circumferential limiting component 30 more precise and controllable, especially suitable for precision machining scenarios with extremely high requirements for angular positioning accuracy or small dimensional tolerances of the gear 50.

[0035] To further support the generalization of the linear guide structure in this invention, it should be noted that the specific selection of the lead screw assembly is not limited to a common trapezoidal lead screw. For example, in applications requiring higher transmission efficiency and lower frictional resistance, a ball screw pair can be selected. Although self-locking may be lost, position holding can be achieved by adding a brake or using a servo motor with self-locking function. In applications requiring greater load or higher rigidity, a planetary roller lead screw can be selected. Furthermore, the lead screw can be driven by a manually operated handle or handwheel, an electrically driven stepper motor or servo motor, or even a pneumatic motor. Regardless of the specific lead screw type or driving method used, the core essence is to use the helical transmission principle to guide the circumferential limiting member 30 to move precisely to a preset position along a predetermined straight path. This is functionally equivalent to the groove guide in Embodiment 2, jointly demonstrating the rationality and necessity of protecting the "linear guide structure" as a general concept, effectively preventing competitors from circumventing the scope of protection of this invention by simply replacing precision transmission components.

[0036] Example 4 In this embodiment, the multi-specification rapid adaptation structure of the device is described in detail. The mounting base 10 has a plurality of sockets arrayed on it, and the bottom of the adjustment seat 20 is provided with at least two pins that mate with the sockets to mount the adjustment seat 20 onto the mounting base 10. Specifically, as... Figure 1As shown, the insertion holes on the surface of the mounting base 10 are arranged in a matrix and uniformly, forming a standardized grid interface system. The number of pins at the bottom of the adjusting seat 20 is preferably two or more to ensure torsional rigidity during installation. When it is necessary to adapt to gear parts 50 of different diameters, the operator can select a suitable insertion hole on the mounting base 10 as the installation point according to the size range of the target workpiece, and then move the adjusting seat 20 to the new work position and insert it for fixation. This array-like layout constitutes the "coarse adjustment" dimension of the positioning device, allowing the adjusting seat 20 and its circumferential limiting member 30 to quickly switch positions within a large range, thereby adapting to the processing requirements of gear parts 50 of different diameters. It should be understood that although the insertion holes shown in the figure are circular threaded holes, in other embodiments, they can also be in the form of smooth holes with nuts, T-slots with slider nuts, or magnetic quick-change interfaces, as long as discrete, repeatable installation points can be provided. The spacing of the insertion holes can be equidistant, such as 20mm, or it can be an unequal sequence set according to commonly used gear specification series, all of which fall within the scope of protection of this invention.

[0037] To further improve the accuracy and changeover efficiency of radial positioning, the radial positioning component 40 is a second positioning pin, which includes an insertion section and a positioning section. The outer diameter of the insertion section matches the inner diameter of the insertion hole, and the outer diameter of the positioning section matches the inner diameter of the weight-reducing hole. Specifically, the second positioning pin adopts a segmented functional decoupling design. The lower insertion section serves as the mounting reference, and its cooperation with the arrayed insertion holes on the mounting base 10 ensures the positional accuracy and perpendicularity of the positioning pin itself within the plane of the mounting base. The upper positioning section serves as the workpiece reference, and its cooperation with the weight-reducing hole of the gear component 50 directly determines the radial positioning accuracy of the workpiece. The advantage of this dual-segment structure is that it physically isolates the "tooling installation error" from the "workpiece positioning error": even if the insertion holes on the mounting base 10 experience slight wear due to long-term use, the positioning accuracy can be restored simply by replacing the extremely low-cost second positioning pin, without needing to repair or replace the entire mounting base 10. At the same time, the coaxiality of the insertion section and the positioning section is guaranteed during manufacturing, ensuring the consistency between the mounting reference and the workpiece reference. In practice, a clearance fit is typically used between the positioning section and the weight reduction hole of the gear component 50. The clearance can be controlled between 0.02mm and 0.05mm, ensuring smooth insertion of the workpiece while limiting radial runout within acceptable limits. The insertion section can be fixed to the insertion hole of the mounting base plate 10 by means of interference fit, threaded connection, or elastic snap-fit, with threaded connection being preferred for easy disassembly and replacement.

[0038] Based on this, the second locating pins include several specifications to accommodate various sizes of weight-reducing holes. Specifically, for different weight-reducing hole diameters commonly used in production (e.g., 8mm, 10mm, 12mm, etc.), a series of second locating pin kits with the same insertion section size but different locating section diameters can be pre-prepared. When the production task changes from one specification of gear component 50 to another, the operator only needs to remove the current second locating pin and replace it with a new locating pin of the corresponding hole diameter to complete the change of radial positioning reference. The entire process does not require recalibrating the position of the mounting base 10 or the adjusting seat 20. This modular design, combined with the aforementioned array-type insertion holes, constructs a dual flexible mechanism of "coarse adjustment + precise positioning": the array-type insertion holes solve the problem of circumferential limit component 30 stroke adaptation caused by different sizes, and the multi-specification second locating pins solve the problem of radial reference adaptation caused by different weight-reducing hole sizes. The synergistic effect of the two allows the same positioning device to complete rapid changeover of cross-specification products within minutes, significantly reducing tooling investment costs and production preparation time, reflecting the core value of flexible manufacturing. It should be understood that the specifications of the second locating pin are not limited to changing only the diameter of the locating section. In some special scenarios, it can also be designed as a variant with adjustable locating section length or interchangeable locating section shape (such as cylindrical, rhomboid, or conical) to adapt to the positioning requirements of non-circular weight-reducing holes or other irregularly shaped holes.

[0039] Example 5 This embodiment describes the usage process of the aforementioned gear angular positioning device from a methodological perspective, aiming to protect a standardized angular positioning execution logic. Even if a specific mechanical structure different from the aforementioned embodiment is used, the same technical effect can still be achieved as long as the positioning timing and coordination principle disclosed in this embodiment are followed. Specifically, the angular positioning method of this gear first includes installing both the adjusting seat 20 and the radial positioning member 40 on the mounting base 10. In this preparation stage, the operator needs to pre-select and roughly adjust the components according to the specific specifications of the gear 50 to be processed. For example, based on the diameter of the weight reduction hole of the gear 50, a second positioning pin with a matching outer diameter is selected from the multi-specification kit as the radial positioning member 40 and inserted into the corresponding array of sockets on the mounting base 10; at the same time, based on the outer diameter range of the gear 50, the adjusting seat 20 is installed on the appropriate socket group on the mounting base 10, so that the linear guide structure on the adjusting seat 20 roughly points to the expected installation area of ​​the gear 50. This pre-installed installation process based on specifications essentially completes the "coarse adjustment" of the positioning system, laying a physical benchmark for subsequent precise positioning and avoiding extensive location searches or repeated trial and error during the positioning process.

[0040] After completing the installation of the basic components, align the weight-reducing holes of gear 50 with the radial positioning component 40 to radially position gear 50. Adjust the position of gear 50 so that the gear surface between two adjacent weight-reducing holes is located in the marking area. Specifically, the operator holds gear 50 and vertically inserts the weight-reducing hole at its bottom into the positioning section of the fixed radial positioning component 40. Due to the precise clearance fit (e.g., 0.02mm to 0.05mm) between the outer diameter of the radial positioning component 40 and the inner diameter of the weight-reducing hole, when they are in place, the geometric center of gear 50 is forcibly constrained to a position coaxial with the radial positioning component 40, thereby eliminating the translational freedom of gear 50 in the horizontal plane. At this time, although gear 50 can still rotate freely around the axis of the radial positioning component 40, its rotation center has been uniquely determined. The operator can manually rotate gear 50 and, by visual inspection or auxiliary alignment tools, initially adjust the target marking surface between two adjacent weight-reducing holes to face the marking machine's working head. This step establishes the radial reference for angular positioning, which is a necessary prerequisite for subsequent implementation of circumferential constraints.

[0041] Subsequently, the circumferential limiting member 30 is slid along the linear guide structure so that the working surface of the circumferential limiting member 30 fits against the outer contour of the gear 50, forming an angular constraint on the gear 50, thereby completing the angular positioning of the gear 50. Specifically, while keeping the gear 50 fitted onto the radial positioning member 40, the operator pushes the circumferential limiting member 30 along the linear guide structure on the adjusting seat 20 toward the gear 50 until its working surface is tightly fitted against the surface of the gear 50. Since the rotation center of the gear 50 has been determined by the radial positioning member 40, the linear feed motion of the circumferential limiting member 30 at this time is actually a tangential approximation in a polar coordinate system with that center as the origin. At the instant the working surface fits against the outer contour, the rotational freedom of the gear 50 around its axis is completely restricted, and its angular position is uniquely locked. It should be particularly emphasized that the above-mentioned "radial positioning first, then circumferential constraint" operation sequence has strict causal dependence and irreversibility. If one attempts to fix the circumferential limiting component 30 before inserting the gear component 50, it is not only difficult to ensure that the gear component 50 can be installed smoothly, but it is also impossible to establish a precise rotation center using the feature holes of the workpiece itself, which can easily lead to positioning deviations or even workpiece jamming. Only through the standardized timing sequence described in this embodiment can the complex angular alignment problem be decoupled into two simple independent mechanical actions of "centering" and "stopping rotation," thereby achieving efficient and accurate positioning without relying on human experience.

[0042] Example 6 This embodiment takes laser marking as an example and verifies the actual application effect of the above-mentioned gear angular positioning device by combining specific process parameters and operation procedures. In this application scenario, the mounting base 10, the adjusting seat 20, and the circumferential limiting component 30 are all made of hard nylon material. This material has sufficient rigidity to ensure positioning stability and can effectively avoid collisions and scratches when in contact with the surface of the gear component 50. The thickness of the mounting base 10 is set to 15mm, and the sockets distributed on its surface are specifically M6 threaded holes with a center-to-center distance of 20mm between adjacent sockets. This standardized grid interface provides flexible coarse adjustment mounting positions for the adjusting seat 20 and the radial positioning component 40.

[0043] During the tooling and debugging phase, the operator first configures the components according to the specifications of the gear part 50 to be processed. Taking a gear part 50 with an inner diameter of 8mm and an outer diameter of 100mm as an example, a second locating pin with an outer diameter of 8mm is selected as the radial locating component 40, and its insertion section is screwed into the M6 ​​threaded hole at a predetermined position on the mounting base plate 10. At this time, a clearance fit of 0.02mm to 0.05mm is formed between the locating section of the radial locating component 40 and the weight reduction hole of the gear part 50. This clearance fit ensures that the gear part 50 can be smoothly fitted in while limiting the radial runout to the micron level, laying the physical foundation for high-precision angular positioning. Subsequently, the adjusting seat 20 is fixed to the insertion hole group at a suitable position on the mounting base plate 10 by the bottom pin, so that the long strip positioning adjustment groove on the adjusting seat 20 roughly points to the expected installation area of ​​the gear part 50. Loosen the fastening screws on the circumferential limiting member 30, slide the circumferential limiting member 30 along the positioning adjustment groove, fit the gear member 50 onto the radial positioning member 40 and rotate it until the target marking surface faces the marking head, then push the circumferential limiting member 30 so that its working surface fits tightly against the outer contour of the gear member 50, and finally tighten the fastening screws to complete the locking. This process, through a combination of "coarse adjustment and fine adjustment of fit," completes the establishment of the positioning reference and the setting of the constraint state in one go.

[0044] After debugging, mass production can begin. During workpiece positioning, the operator only needs to align the weight-reducing hole of the gear component 50 and fit it into the radial positioning component 40. Utilizing the aforementioned precision clearance fit, automatic centering is achieved. Then, the gear component 50 is gently pushed so that its surface aligns with the fixed circumferential limiting component 30's working surface, instantly completing the angular constraint without any manual alignment or measuring tools. This standardized operating mode, combining mechanical self-centering and unidirectional alignment, significantly reduces the time required for a single positioning operation. Furthermore, the positioning consistency is entirely guaranteed by the device's manufacturing precision, eliminating error fluctuations caused by human factors. Actual measurements show that when using this device for angular positioning, the angular error can be controlled within 0.1°, and the marking position deviation is less than or equal to 0.05mm. Compared to traditional manual alignment methods, positioning efficiency is improved by more than 80%, significantly reducing the scrap rate caused by inaccurate positioning.

[0045] When production tasks change and a new gear part 50 with a weight-reduction hole inner diameter of 10mm and an outer diameter of 120mm is required, the rapid adaptation advantage of this device is fully demonstrated. Operators do not need to replace the entire tooling set; they only need to perform the following changeover operations: First, remove the current 8mm second locating pin and replace it with a new second locating pin with an outer diameter of 10mm. Second, due to the increased outer diameter of the new gear part 50, remove the adjusting seat 20 from the current insertion hole group, move it to a set of insertion holes on the outer side of the mounting base 10, and reinsert it to accommodate the larger workpiece radius. Finally, loosen the fastening screws, fine-tune the position of the circumferential limiting member 30 in the positioning adjustment groove until it fits the outer contour of the new gear part 50, and then tighten it again. The entire changeover process involves only the replacement of one locating pin and one coarse adjustment of the adjusting seat position and one fine adjustment of the slider. No special tools or recalibration of the reference are required throughout, and the actual time taken is no more than 5 minutes. This flexible adaptability based on modular interfaces and multi-dimensional adjustment structures enables the same set of equipment to cover the processing needs of various specifications of gear parts 50, greatly reducing tooling investment costs and production preparation time, and effectively solving the technical problems of cumbersome changeover and poor adaptability in existing technologies.

[0046] It should be noted that any parts not disclosed or specifically described in this invention are existing technology or conventional configurations, and their specific structures and working principles will not be elaborated further. In this document, 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 a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0047] Although embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. It can be applied to various fields suitable for the present invention. Other modifications can be readily implemented by those skilled in the art. Therefore, without departing from the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details and examples shown and described herein.

Claims

1. An angular positioning device for a gear component, characterized in that, The system includes a mounting base plate connected to the worktable of a marking machine. The mounting base plate is equipped with a positioning component, which includes: An adjustment seat is mounted on the mounting base plate, and the adjustment seat is provided with a linear guide structure, the guiding direction of which is parallel to the mounting base plate. A circumferential limiting member is slidably connected to the linear guide structure. The circumferential limiting member is configured to move along the linear guide structure to a preset position so that the working surface of the circumferential limiting member fits against the outer contour of the gear component, thereby forming an angular constraint on the gear component. A radial positioning element is mounted on a mounting base plate, and the radial positioning element can be inserted into the weight reduction hole of the gear to radially position the gear; The circumferential limiting component and the radial positioning component work together, with the radial limiting of the radial positioning component as the reference and the outer circle of the circumferential limiting component fitting together to form a circumferential constraint, so that the surface between two adjacent weight reduction holes on the gear component is aligned with the marking area.

2. The angular positioning device for a gear component according to claim 1, characterized in that, The linear guide structure is a long strip-shaped positioning and adjusting groove that extends along the adjusting direction of the slider on the adjusting seat. The circumferential limiting member is a slider, and one end of the slider is slidably connected to the positioning and adjusting groove.

3. The angular positioning device for a gear component according to claim 2, characterized in that, It also includes a fastening screw that secures the slider to the adjusting seat to limit slider movement.

4. The angular positioning device for a gear component according to claim 2, characterized in that, It also includes a first positioning pin, the slider has a first opening, and the adjusting seat has a plurality of grooves along the adjusting direction of the slider. The first positioning pin passes through the first opening and is inserted into the groove to restrict the slider from sliding.

5. The angular positioning device for a gear component according to claim 1, characterized in that, The linear guide structure is a lead screw assembly, and the circumferential limiting member is a long strip-shaped connecting block, which is connected to the nut of the lead screw assembly.

6. The angular positioning device for a gear component according to claim 1, characterized in that, The mounting base has a plurality of sockets arrayed on it, and the bottom of the adjustment seat is provided with at least two pins, which match the sockets to install the adjustment seat on the mounting base.

7. The angular positioning device for a gear component according to claim 6, characterized in that, The radial positioning element is a second positioning pin, which includes a insertion section and a positioning section. The outer diameter of the insertion section matches the inner diameter of the insertion hole, and the outer diameter of the positioning section matches the inner diameter of the weight reduction hole.

8. The angular positioning device for a gear component according to claim 7, characterized in that, The second locating pin is available in several sizes to accommodate various sizes of weight-reducing holes.

9. A method for angular positioning of a gear component, using the angular positioning device for a gear component according to any one of claims 1 to 8, characterized in that, include: Both the adjusting seat and the radial positioning component are mounted on the mounting base plate; Align the weight reduction holes of the gear with the radial positioning parts to radially position the gear and adjust the position of the gear so that the gear surface between two adjacent weight reduction holes is in the marking area. The circumferential limiting component slides along the linear guide structure so that the working surface of the circumferential limiting component fits against the outer contour of the gear component, forming an angular constraint on the gear component, thereby completing the angular positioning of the gear component.

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