A reusable clamping type code machine rapid positioning fixture

Abstract

This utility model discloses a reusable, quick-positioning fixture for a character coder, including a worktable and a marking mechanism, a material loading mechanism, a detection mechanism, a dust blowing mechanism, and a dust collection mechanism mounted on it. The marking mechanism achieves high-precision laser marking via a servo-driven X / Z-axis slide; the material loading mechanism employs a pneumatic clamping design with conical ventilation holes, combined with a dust collection system to collect dust; the detection mechanism monitors the workpiece position in real time using a photoelectric sensor; and the dust blowing mechanism automatically cleans the workpiece surface using a universal nozzle. All mechanisms are connected to a central control system, forming a closed-loop control system, enabling efficient and high-precision marking on the mold surface, with a repeatability accuracy ≤0.02mm and a dust collection rate ≥95%, suitable for batch marking of precision molds.

Description

Technical Field

[0001] This utility model relates to the field of laser marking technology, and in particular to a quick positioning fixture for a reusable character marking machine. Background Technology

[0002] In the mold manufacturing industry, it is often necessary to permanently mark the mold surface (such as serial numbers, production dates, model numbers, etc.) for product traceability and quality control. Traditional marking methods include mechanical engraving, chemical etching, or inkjet printing, but these methods have the following drawbacks: 1. Insufficient precision: Mechanical engraving is easily affected by tool wear, resulting in inconsistent marking depth and affecting readability; 2. Low efficiency: Traditional methods require multiple clamping and positioning, affecting batch processing efficiency; 3. Surface damage risk: Mechanical contact marking may scratch the mold surface, affecting subsequent use; 4. Dust pollution: Metal dust generated during engraving or marking can easily adhere to the workpiece surface, affecting marking quality and equipment lifespan.

[0003] Currently, laser marking technology is gradually being applied to mold marking due to its advantages such as non-contact and high precision. However, existing laser marking equipment still has the following problems: 1. Positioning accuracy depends on manual adjustment, and deviations are easily generated when repeatedly clamped; 2. There is a lack of integrated dust removal system, and dust accumulation affects the life of the laser head and the clarity of the marking; 3. The degree of automation is low, making it difficult to adapt to the needs of large-scale continuous production.

[0004] Therefore, there is an urgent need for a laser character marking machine fixture with high-precision positioning, automatic dust removal and quick clamping functions to improve the efficiency and quality of mold marking. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the defects of the prior art and provide a quick positioning fixture for a character code machine that can be repeatedly clamped.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0007] This utility model discloses a reusable, quick-positioning fixture for a character coder, comprising a worktable, and mounted on the worktable are: a marking mechanism configured to perform laser marking on workpieces; a loading mechanism including a loading platform with ventilation holes and a positioning clamping assembly, the bottom of which has a ventilation interface communicating with a dust collection mechanism; a detection mechanism fixed to the worktable by a bracket and located directly above the loading mechanism, configured to detect workpiece position deviation and output feedback signals; a dust blowing mechanism fixed to the side of the worktable by a gantry bracket, with its universal nozzle facing the center of the loading mechanism; and a dust collection mechanism fixed to the bottom of the worktable by a U-shaped bracket and sealed to the ventilation interface of the loading mechanism via a ventilation duct; wherein the marking mechanism, detection mechanism, dust blowing mechanism, and dust collection mechanism are all communicatively connected to a central control system, forming a closed-loop control system.

[0008] As a preferred technical solution of this utility model, the marking mechanism includes: an X-axis slide table that moves along the X-axis and is driven by an X-axis servo motor; a Z-axis slide table that moves along the Z-axis, fixed on the X-axis slide table and driven by a Z-axis servo motor; a laser marking head and a distance sensor that are coaxially mounted on the Z-axis slide table; wherein the output end of the distance sensor is connected to the controller signal of the X-axis servo motor and the Z-axis servo motor to form a position feedback closed loop.

[0009] As a preferred embodiment of this utility model, the material loading mechanism includes: a horizontal guide rail and a drive slide rail arranged in parallel, driven by a stepper motor via a synchronous belt; a loading platform, which is slidably connected to the horizontal guide rail and the drive slide rail via a linear slider, and the surface of the loading platform is provided with conical ventilation holes arranged in a matrix; an X-axis positioning block and a Y-axis positioning block, which are respectively vertically fixed to the adjacent two sides of the loading platform; an X-axis clamping cylinder, which is fixed to the loading platform and is arranged opposite to the X-axis positioning block; and two sets of Y-axis clamping cylinders, which are symmetrically arranged below the worktable and whose piston rod movement direction is parallel to the Y-axis positioning block.

[0010] As a preferred technical solution of this utility model, the piston rod end of the Y-axis clamping cylinder is provided with a silicone gripper, and the clamping surface of the silicone gripper is provided with a diamond-shaped anti-slip texture with a depth of 0.5-1mm; the upper end diameter of the tapered ventilation hole is 3-5mm, the lower end diameter is 2-3mm, and the taper is 15°-30°.

[0011] As a preferred embodiment of this utility model, the detection mechanism includes: a pair of vertically arranged sensor fixing brackets, symmetrically fixed on both sides of the material loading mechanism; a through-beam photoelectric sensor, fixed to the top of the sensor fixing brackets by a height-adjustable mounting base; wherein the signal output end of the through-beam photoelectric sensor is electrically connected to the emergency stop module of the central control system.

[0012] As a preferred technical solution of this utility model, the dust blowing mechanism includes: a gantry support spanning above the material loading mechanism; an adjustable blowing pipe, which is installed on the gantry support via a rotating support, and its outlet end is provided with a universal nozzle; a proximity switch, which is fixed to the side wall of the gantry support and has an adjustable detection distance; and a solenoid valve, which is connected to the air source input end of the adjustable blowing pipe and is electrically connected to the proximity switch.

[0013] As a preferred embodiment of this utility model, the dust collection mechanism includes: a U-shaped bracket bolted to the top of the workbench; a lifting cylinder vertically fixed inside the U-shaped bracket; and a dust collection bracket, the bottom of which is fixed to the piston rod of the lifting cylinder, and the top of which is connected to the ventilation duct via a quick-release flange.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] 1. The X / Z axis slide table driven by a servo and the range sensor are used to achieve micron-level positioning accuracy of the laser marking head; the universal nozzle of the dust blowing mechanism is linked with the dust collection mechanism to automatically remove dust from the workpiece surface before marking, so as to avoid dust interference with laser focusing; the conical ventilation hole design of the stage enhances the negative pressure adsorption effect, the dust collection efficiency is ≥95%, and the service life of the equipment is extended.

[0016] 2. The anti-slip texture design of the silicone grippers protects the mold surface while ensuring a single clamping time of ≤3 seconds; the through-beam photoelectric sensor of the detection mechanism monitors the workpiece position in real time and triggers an emergency stop in case of abnormality, reducing the scrap rate;

[0017] 3. The marking, dust removal, and inspection functions work collaboratively through the central control system, supporting unmanned production mode; the quick-release dust collection pipes and adjustable nozzles facilitate maintenance and adapt to the processing needs of molds of different sizes. Attached Figure Description

[0018] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is the front view of this utility model;

[0021] Figure 3 This is a top view of the present invention;

[0022] Figure 4 This is a side view of the present invention;

[0023] Figure 5 This is a schematic diagram of the Y-axis clamping cylinder in this utility model;

[0024] In the diagram: 1. Workbench; 2. Marking mechanism; 3. Material loading mechanism; 4. Detection mechanism; 5. Dust blowing mechanism; 6. Dust suction mechanism; 7. Ventilation duct; 21. X-axis slide table; 22. Z-axis slide table; 23. Laser marking head; 24. X-axis servo motor; 25. Z-axis servo motor; 26. Distance sensor; 31. Horizontal guide rail; 32. Drive slide rail; 33. Stage; 34. X-axis positioning block; 35. Y-axis positioning block 36. X-axis clamping cylinder; 37. Y-axis clamping cylinder; 38. Stepper motor; 39. Ventilation hole; 41. Sensor mounting bracket; 42. Photoelectric sensor; 51. Gantry bracket; 52. Adjustable blower; 53. Proximity switch; 54. Solenoid valve; 55. Universal nozzle; 56. Rotary support; 61. U-shaped bracket; 62. Lifting cylinder; 63. Vacuum suction bracket; 371. Silicone gripper; 372. Anti-slip texture. Detailed Implementation

[0025] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0026] In the attached diagram, all identical reference numerals refer to the same components.

[0027] Example 1: Implementation method for high-precision mold marking

[0028] like Figure 1-5 As shown, this embodiment is used for laser marking of serial numbers on the surface of automotive molds, and the specific structure is as follows:

[0029] Workbench 1 is made of cast iron platform with a ground surface and a flatness of ≤0.01mm / m.

[0030] Please see Figure 3 The loading platform 33 of the loading mechanism 3 is connected to the worktable 1 through the horizontal guide rail 31 and the drive slide rail 32. The stepper motor 38 drives the loading platform 33 to move along the X-axis through the synchronous belt, with a repeatability of ±0.005mm.

[0031] The platform 33 has 16 conical ventilation holes 39 in the middle, with an upper diameter of 4mm, a lower diameter of 2.5mm, and a taper of 20°, which are connected to the ventilation duct 7 of the dust collection mechanism 6.

[0032] X-axis positioning block 34 and Y-axis positioning block 35 are fixed to adjacent sides of the stage 33 by bolts. They work together with X-axis clamping cylinder 36 and two sets of Y-axis clamping cylinders 37 to clamp the mold. The clamping force is adjustable from 50 to 200 N. X-axis clamping cylinder 36 is fixed above the stage by mounting base.

[0033] The X-axis slide 21 and Z-axis slide 22 of the marking mechanism 2 are driven by the X-axis servo motor 24 and the Z-axis servo motor 25, respectively. The focal length of the laser marking head 23 is 100mm and the spot diameter is 0.02mm.

[0034] The distance sensor 26 is installed on the side of the Z-axis slide table 22 to detect the distance between the laser head and the mold surface in real time, and feeds back to the servo motor to achieve closed-loop control, ensuring that the marking depth is consistent with ±0.01mm.

[0035] Please see Figure 2 The through-beam photoelectric sensor 42 of the detection mechanism 4 is fixed to the top of the sensor fixing bracket 41 by a height-adjustable mounting base. It detects the position deviation of the mold edge and triggers an emergency stop when the deviation exceeds 0.1mm.

[0036] Please see Figure 4 The universal nozzle 55 of the dust blowing mechanism 5 adjusts its angle through the rotating support 56, and the blowing pressure is 0.3-0.5MPa to remove dust from the mold surface.

[0037] The lifting cylinder 62 of the dust collection mechanism 6 pushes the dust collection bracket 63 to rise, so that the ventilation duct 7 is sealed and connected to the bottom of the platform 33, with a wind speed ≥5m / s and a dust collection rate ≥95%.

[0038] The method of using this utility model is as follows:

[0039] 1. The mold is placed on the stage 33 and clamped by the X / Y clamping cylinder;

[0040] 2. The photoelectric sensor 42 detects the position, and the dust blowing mechanism 5 removes surface dust;

[0041] 3. The laser marking head 23 completes the marking, and the dust collection mechanism 6 collects the residual dust.

[0042] Example 2: Implementation Method for Batch Marking of Small Precision Parts

[0043] This embodiment is suitable for batch marking of small parts of electronic connectors, and the structure is optimized as follows:

[0044] Improvements to the material handling mechanism: The stage 33 is reduced in size to 300mm × 200mm, the number of ventilation holes 39 is increased to 72, and the hole diameter is reduced to 3mm (top) / 2mm (bottom), improving the adsorption stability of small parts. The silicone grippers 371 of the Y-axis clamping cylinder 37 have been given a diamond-shaped anti-slip texture 372 with a texture depth of 0.8mm to prevent damage to the part surface. Please refer to [link / reference]. Figure 5 .

[0045] The marking mechanism has been adjusted: the laser marking head 23 has been replaced with an ultraviolet laser source with a wavelength of 355nm, which is suitable for marking plastic parts, and the marking speed has been increased to 200mm / s. The X-axis slide 21 has a stroke shortened to 150mm and an acceleration of 1.5m / s², which can meet the needs of high-frequency marking.

[0046] Dust removal system coordinated control: After the proximity switch 53 of the dust blowing mechanism 5 detects that the platform 33 is in place, the solenoid valve 54 automatically opens and blows air for 0.2 seconds, and the blowing time is adjustable. The wind speed of the dust suction mechanism 6 is increased to 10m / s to ensure effective collection of fine dust.

[0047] Workflow: Workers place parts in batches → Platform 33 automatically moves to the marking station → Dust blowing / marking / dust suction are performed simultaneously → Processing cycle for each part is ≤1.5 seconds.

[0048] The test results are as follows: In Example 1, the position repeatability error of the car mold was ≤ ±0.008mm after 100 markings (actual data); In Example 2, the batch marking efficiency was improved by 60% compared with the traditional single-piece processing; The tapered design of the ventilation hole 39 reduced the dust residue to 0.5mg / m².

[0049] This invention is a reusable clamping quick positioning fixture for a character coder, which significantly improves the accuracy (up to ±0.01mm) and efficiency of mold marking (single-piece processing cycle shortened by more than 40%). At the same time, it reduces equipment failure rate through active dust removal, and is suitable for batch marking scenarios of precision molds in industries such as automobiles and electronics.

[0050] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A reusable clamping type code machine rapid positioning fixture, comprising a worktable (1), characterized in that: It also includes the following installed on the workbench (1): a marking mechanism (2), configured to perform laser marking on the workpiece; a loading mechanism (3), including a loading platform (33) with ventilation holes (39) and a positioning clamping assembly, wherein the bottom of the loading platform (33) is provided with a ventilation interface communicating with the dust collection mechanism (6); a detection mechanism (4), which is fixed to the workbench (1) by a bracket and located directly above the loading mechanism (3), configured to detect the workpiece position deviation and output a feedback signal; a dust blowing mechanism (5), which is fixed to the side of the workbench (1) by a gantry bracket (51), with its universal nozzle (55) facing the center of the loading mechanism (3); and a dust collection mechanism (6), which is fixed to the bottom of the workbench (1) by a U-shaped bracket (61) and is sealed to the ventilation interface of the loading mechanism (3) by a ventilation duct (7); wherein the marking mechanism (2), the detection mechanism (4), the dust blowing mechanism (5) and the dust collection mechanism (6) are all connected to the central control system to form a closed-loop control system.

2. The reusable clamping quick positioning fixture for a character code machine according to claim 1, characterized in that, The marking mechanism (2) includes: an X-axis slide (21) that moves along the X-axis and is driven by an X-axis servo motor (24); a Z-axis slide (22) that moves along the Z-axis, fixed on the X-axis slide (21) and driven by a Z-axis servo motor (25); a laser marking head (23) and a distance sensor (26) that are mounted on the Z-axis slide (22); wherein the output end of the distance sensor (26) is connected to the controller signal of the X-axis servo motor (24) and the Z-axis servo motor (25) to form a position feedback closed loop.

3. The reusable clamping quick positioning fixture for a character code machine according to claim 1, characterized in that, The material loading mechanism (3) includes: a horizontal guide rail (31) and a drive slide rail (32) arranged in parallel, driven by a stepper motor (38) via a synchronous belt; a loading platform (33) which is slidably connected to the horizontal guide rail (31) and the drive slide rail (32) via a linear slider, and the surface of the loading platform (33) is provided with conical ventilation holes (39) arranged in a matrix; an X-axis positioning block (34) and a Y-axis positioning block (35) which are respectively vertically fixed to the adjacent two sides of the loading platform (33); an X-axis clamping cylinder (36) which is fixed to the loading platform (33) via a mounting base and is arranged opposite to the X-axis positioning block (34); and two sets of Y-axis clamping cylinders (37) which are symmetrically arranged below the worktable (1) and whose piston rod movement direction is parallel to the Y-axis positioning block (35).

4. The reusable clamping quick positioning fixture for a character code machine according to claim 3, characterized in that, The piston rod end of the Y-axis clamping cylinder (37) is equipped with a silicone gripper (371), and the clamping surface of the silicone gripper (371) is provided with a diamond-shaped anti-slip texture (372); the upper end diameter of the tapered ventilation hole (39) is 3-5mm, the lower end diameter is 2-3mm, and the taper is 15°-30°.

5. The reusable clamping quick positioning fixture for a character code machine according to claim 1, characterized in that, The detection mechanism (4) includes: a pair of vertically arranged sensor fixing brackets (41), which are symmetrically fixed on the worktables (1) on both sides of the material loading mechanism (3); a through-beam photoelectric sensor (42), which is fixed to the top of the sensor fixing brackets (41) by a height-adjustable mounting seat; wherein the signal output end of the through-beam photoelectric sensor (42) is electrically connected to the emergency stop module of the central control system.

6. The reusable clamping quick positioning fixture for a character code machine according to claim 1, characterized in that, The dust blowing mechanism (5) includes: a gantry support (51) spanning above the material loading mechanism (3); an adjustable air blowing pipe (52) installed on the gantry support (51) via a rotating support (56), with a universal nozzle (55) at its outlet end; a proximity switch (53) fixed to the side wall of the gantry support (51) and with an adjustable detection distance; and a solenoid valve (54) connected to the air source input end of the adjustable air blowing pipe (52) and electrically connected to the proximity switch (53).

7. The reusable clamping quick positioning fixture for a character code machine according to claim 1, characterized in that, The dust collection mechanism (6) includes: a U-shaped bracket (61), the top of which is fixedly connected to the bottom of the workbench (1); a lifting cylinder (62), which is fixed above the U-shaped bracket (61); and a dust collection bracket (63), the bottom of which is fixed to the piston rod of the lifting cylinder (62), and the top of which is connected to the ventilation duct (7) through a quick-release flange.

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