A quick lettering device for a watch dial

Abstract

This invention discloses a rapid engraving device for watch dials, relating to the technical field of watch dial engraving equipment. It includes a support cabinet, with a rotary indexing transmission component fixedly installed at the center of the upper surface of the cabinet for continuously conveying and removing watch dials. A workpiece surface cleaning component for cleaning and drying the watch dial surface is located to the left rear of the upper surface of the rotary indexing transmission component. This invention uses a flexible cleaning sponge brush to perform non-destructive cleaning of the watch dial surface, combined with a hot air drying machine for directional dehumidification and drying, thoroughly removing dust, oil, and ambient moisture from the watch dial surface. This avoids defects such as rough edges, blackening from burning, peeling plating, and uneven engraving depth caused by direct engraving in traditional equipment. The cleaning and drying processes are synchronized with the rotary station, without additional processing time, significantly improving the clarity, uniformity, and overall integrity of the laser engraving while ensuring processing efficiency.

Description

Technical Field

[0001] This invention relates to the technical field of dial engraving equipment, specifically a device for rapid engraving of watch dials. Background Technology

[0002] During the production and processing of watch dials, laser engraving of characters, scales, logos, and other markings is required on their surface. Existing traditional engraving equipment mostly adopts a single-station fixed processing mode, which can only achieve fixed-point engraving on dials of a single specification. The tooling adaptability is poor, and changing to different dial models requires complete disassembly and adjustment of the tooling, which is time-consuming and labor-intensive. At the same time, traditional equipment lacks a dedicated pre-treatment station before engraving. Dust, fine impurities, and ambient moisture easily adhere to the dial surface, and direct laser engraving can easily result in defects such as rough edges on the characters, blackening from burning, and peeling of the plating, leading to a low yield rate.

[0003] In addition, conventional engraving equipment often relies on manual loading and unloading or the addition of multiple sets of rotary motors and tilting cylinders to unload the dials. The overall electrical and pneumatic structure is complex, with high energy consumption and a high failure rate. The workstations are not smoothly connected, and it is impossible to realize the integrated production line operation of continuous automated loading, surface cleaning, drying and dehumidification, laser engraving, and mechanical automatic unloading of dials of various specifications. It is difficult to meet the needs of large-scale production of watch dials with high precision and high efficiency. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a device for rapid engraving on watch dials.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: This invention provides a device for rapid engraving on a watch dial, comprising: The equipment support cabinet has a rotary indexing transmission assembly for continuously conveying and removing dials fixedly installed at the center of its upper surface. A workpiece surface cleaning assembly for cleaning and drying the dial surface is located to the left rear of the upper surface of the rotary indexing transmission assembly. A main machine mounting frame is fixedly connected to the upper surface of the left end of the equipment support cabinet. A lifting drive cylinder for controlling Z-axis movement is fixedly installed on the right side of the upper surface of the main machine mounting frame. A laser engraving device, consisting of a laser generator and a laser galvanometer, is fixedly mounted on the piston rod at the lower end of the lifting drive cylinder via a mounting plate.

[0006] As a preferred embodiment of the present invention, the rotary indexing transmission assembly includes an intermediate mounting shaft. The upper end of the intermediate mounting shaft is embedded in a seat groove provided on the top of the equipment support cabinet through a bearing with a built-in protrusion. A bottom support frame is fixedly installed at the middle position of the bottom surface of the inner cavity of the equipment support cabinet. A cam intermittent divider is fixedly installed on the upper surface of the bottom support frame by several bolts. A servo drive motor is fixedly installed on the right side of the front end of the cam intermittent divider by several bolts. The output shaft at the left end of the servo drive motor is fixedly connected to the output shaft in front of the cam intermittent divider through a coupling. A rotary indexing turntable is movably engaged at the protrusion position at the upper end of the intermediate mounting shaft. An inner limiting lock hole is opened on the front of the upper end of the intermediate mounting shaft, and an outer limiting slot is opened at the center position of the front of the rotary indexing turntable. Locking and positioning handles are threadedly connected to the inner cavities of the inner limiting lock hole and the outer limiting slot.

[0007] As a preferred embodiment of the present invention, a hexagonal intermediate mounting bracket is fixedly connected to the center of the upper surface of the rotary indexing turntable. A guide mounting groove corresponding to its vertical surface position is arranged in a circular array around the outer periphery of the upper surface of the rotary indexing turntable. A transmission mounting base is movably engaged within each guide mounting groove. A telescopic electric push rod is fixedly mounted on each vertical inner wall of the intermediate mounting bracket. The ends of each telescopic electric push rod that are away from each other are rotatably connected to the surface of each transmission mounting base near the intermediate mounting bracket via bearings. A workpiece positioning mounting plate is fixedly connected to the surface of each telescopic electric push rod near the transmission mounting base. An elastic return spring is fixedly connected to the side of each workpiece positioning mounting plate away from the telescopic electric push rod. A limiting fixing post is fixedly connected directly above each elastic return spring and on the surface of the workpiece positioning mounting plate. A return movable post that overlaps with the surface of the limiting fixing post is fixedly connected to the surface of each transmission mounting base near the intermediate mounting bracket.

[0008] As a preferred embodiment of the present invention, each of the transmission mounting bases has a workpiece positioning mounting groove on its upper surface, and a dial limiting bracket is movably engaged in the groove of each workpiece positioning mounting groove. Each dial limiting bracket has an adjusting thread groove on the surface of its end away from the intermediate mounting bracket, and each of the transmission mounting bases has an alignment mounting screw hole corresponding to the position of the adjusting thread groove on the surface of its end away from the intermediate mounting bracket. Each alignment mounting screw hole and the inner cavity of the adjusting thread groove are threadedly connected to a first positioning adjustment knob.

[0009] As a preferred embodiment of the present invention, each of the transmission mounting bases has a wide-spacing adjustment screw groove at the center of the surface away from the intermediate mounting bracket. An annular collection groove is fixedly connected to the outer wall of the intermediate mounting shaft and the upper surface of the equipment support cabinet. An adjustment support frame is fixedly connected to the left front of the upper end face of the annular collection groove. A wide-spacing adjustment stud is engaged in the groove at the rear end of the adjustment support frame. An operating handle is threadedly connected to the inner wall of the front end of the wide-spacing adjustment stud. An auxiliary limit contact is fixedly connected to the rear end of the wide-spacing adjustment stud.

[0010] As a preferred embodiment of the present invention, a stepped mounting hole communicating with the inner cavity of the width-spacing adjusting screw groove is provided at the center of the upper end surface of each of the transmission mounting bases, and an alignment and disassembly hole communicating with the inner cavity of the stepped mounting hole is provided at the center of the upper surface of each of the dial limiting card seats. A workpiece unloading top post is inserted into the inner cavity of each of the stepped mounting holes and the alignment and disassembly holes. An annular positioning mounting ring is fixedly connected to the lower end surface of each of the workpiece unloading top posts, and a buffer support spring disposed in the inner cavity of the stepped mounting hole is fixedly connected to the upper end surface of each of the annular positioning mounting rings.

[0011] As a preferred embodiment of the present invention, a transmission connection frame that penetrates the outer surface of the annular collection trough is fixedly connected to the upper surface of both ends of the equipment support cabinet. An annular transmission belt is movably sleeved on the surface of the roller shaft of the transmission connection frame. A stepper drive motor is fixedly installed on the front of the left end of the transmission connection frame, and the output shaft of the rear end of the stepper drive motor is fixedly connected to the extended end of the roller shaft on the left side of the transmission connection frame through a coupling.

[0012] As a preferred embodiment of the present invention, the workpiece surface cleaning assembly includes an eccentric mounting frame. The lower end of the eccentric mounting frame is fixedly connected to the left rear of the upper surface of the annular collection groove. A sensor mounting bracket with a built-in mounting hole is fixedly connected to the front of the lower end of the eccentric mounting frame. A proximity switch is fixedly installed in the mounting hole at the front end of the sensor mounting bracket.

[0013] As a preferred embodiment of the present invention, a height adjustment cylinder is fixedly installed on the upper surface of the front end of the eccentric mounting frame. A rotary drive motor is fixedly installed on the lower end of the height adjustment cylinder via a mounting plate. The output shaft of the rotary drive motor is fixedly connected to a cleaning liquid storage tank via the mounting plate. A liquid transfer cylinder is fixedly connected to the middle of the lower surface of the cleaning liquid storage tank. A cleaning sponge brush is movably inserted into the inner cavity of the lower end of the liquid transfer cylinder. Two positioning holes with corresponding positions are opened on the left side of the lower end of the liquid transfer cylinder and the left side of the cleaning sponge brush. A second positioning adjustment knob is threaded into each of the front and rear positioning holes.

[0014] As a preferred embodiment of the present invention, an upper lifting electric push rod is fixedly installed on the rear end face of the cleaning liquid storage tank, and a sealing block is fixedly connected to the front end of the upper lifting electric push rod. An inner limiting block is fixedly connected to the bottom surface of the inner cavity of the cleaning liquid storage tank directly behind the sealing block. A guide groove is opened at the center of the lower back of the sealing block. A liquid conveying hole extending downward to the center of the bottom surface of the front inner cavity of the cleaning liquid storage tank is opened. V-shaped flow equalization and dispersing plates are fixedly connected to the inner walls of both sides of the upper end of the liquid transfer cylinder. A hot air drying heater is fixedly installed at the middle of both sides of the liquid transfer cylinder through a mounting plate.

[0015] The beneficial effects of this invention are: 1. This watch dial rapid engraving device enables quick adaptation to multiple dial specifications, significantly improving equipment versatility and changeover efficiency: This device utilizes a quick-release structure with a dial limiting holder and a first positioning adjustment knob. It allows for rapid replacement of the corresponding cavity dial limiting holder for watch dials of different sizes and shapes, without disassembling the entire machine's transmission structure or performing complex adjustments. The dial limiting holder features a dedicated contoured cavity, enabling precise automatic positioning after the dial is inserted, eliminating the need for repeated manual calibration. This completely solves the problems of fixed tooling, poor adaptability, and time-consuming and labor-intensive changeovers in traditional engraving equipment. One device can meet the engraving needs of all types of watch dials, effectively reducing equipment procurement and debugging costs for enterprises and adapting to flexible production models with multiple varieties and small batches.

[0016] 2. This watch dial rapid engraving device, with its dedicated pre-processing step, significantly improves engraving quality and yield rate: The device integrates a workpiece surface cleaning component, using a flexible cleaning sponge brush to clean the dial surface without damage. Combined with a hot air drying unit, it performs targeted dehumidification and drying, thoroughly removing dust, oil, and ambient moisture from the dial surface. This avoids defects such as rough edges, blackening from burning, peeling plating, and uneven engraving depth caused by direct engraving in traditional equipment. The cleaning and drying processes are synchronized with the turntable station, without additional processing time. While ensuring processing efficiency, it significantly improves the clarity and uniformity of laser engraving and the integrity of the dial appearance, effectively reducing the scrap rate and meeting the precision processing requirements of high-end watch dials.

[0017] 3. This watch dial rapid engraving device features a unique, purely mechanical dual-force coordinated unloading structure, completely eliminating material jamming issues and simplifying the equipment structure: Driven by a single telescopic electric push rod, and through the threaded engagement of the wide-pitch adjusting stud and the wide-pitch adjusting groove, the transmission mounting base is simultaneously rotated 180° for gravity unloading, and the auxiliary limit contact pushes the workpiece unloading column for unloading. The synergistic effect of the two forces completely solves the problems of dial jamming and failure to drop material that are prone to occur with single unloading methods. The entire unloading process does not require additional independent power components such as rotary motors and tilting cylinders, eliminating the need for complex electrical and pneumatic connections and control programs, greatly simplifying the overall structure of the machine, reducing equipment failure points, reducing the difficulty of later maintenance, and effectively reducing equipment power consumption, achieving energy-saving and efficient operation.

[0018] 4. This watch dial rapid engraving device features multi-station intermittent cyclic operation, achieving fully automated continuous operation and improving processing efficiency. The system employs a cam-driven intermittent divider in conjunction with a servo-driven motor to drive a rotary indexing turntable, enabling precise indexing and stopping at multiple stations for loading, cleaning, engraving, and unloading. The actions of each station are seamlessly connected, eliminating the need for manual loading / unloading, manual cleaning, or separate unloading. The turntable's circumferential array of multiple processing stations allows for simultaneous operation of different processes, eliminating the waiting period for single-station equipment. This enables continuous and automated batch processing of watch dials, significantly improving overall processing efficiency compared to traditional single-station fixed engraving equipment, thus meeting the large-scale production needs of the watch industry.

[0019] 5. This watch dial rapid engraving device features a flexible transmission and protective structure design, ensuring the integrity of the dial processing and the stability of equipment operation. The device incorporates multiple elastic buffer structures. Elastic return springs enable flexible reset of the transmission mounting base, while buffer support springs provide flexible pushing force for the workpiece unloading top column. The cleaning sponge brush features a soft, rounded corner design, preventing scratches, deformation, and indentations on the dial during clamping, rotation, cleaning, and unloading. Simultaneously, the rotary indexing turntable ensures precise indexing, and the laser engraving device is vertically adjustable. Combined with the radial guidance limit of the guide mounting groove, this ensures stable operation and accurate positioning of each mechanism, preventing precision drift over long-term use. This extends the equipment's lifespan and further guarantees the accuracy of the dial engraving position and processing stability. Attached Figure Description

[0020] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the structure of a rapid engraving device for watch dials according to the present invention; Figure 2 This is a schematic diagram of the structure of a watch dial rapid engraving device according to the present invention from the right side view; Figure 3This is a front sectional view of a watch dial rapid engraving device according to the present invention; Figure 4 This invention relates to a device for rapid engraving of clock dials. Figure 3 A structural diagram from below; Figure 5 This is an overall structural diagram of the equipment support cabinet for the watch dial rapid engraving device of the present invention; Figure 6 This is a cross-sectional view of the workpiece surface cleaning assembly and unloading structure of the watch dial rapid engraving device of the present invention; Figure 7 This invention relates to a device for rapid engraving of clock dials. Figure 6 A structural diagram from a rear view; Figure 8 This is a separate diagram of the components of the workpiece surface cleaning assembly of the watch dial rapid engraving device of the present invention; Figure 9 This invention relates to a device for rapid engraving of clock dials. Figure 8 A structural diagram from a rear view; Figure 10 This invention relates to a device for rapid engraving of clock dials. Figure 8 A structural diagram from below; Figure 11 This is a separate diagram of the components of the return indexing transmission assembly of the watch dial rapid engraving device of the present invention; Figure 12 This invention relates to a device for rapid engraving of clock dials. Figure 11 A structural diagram from below; Figure 13 This invention relates to a device for rapid engraving of clock dials. Figure 11 A structural diagram from a rear view; Figure 14 This invention relates to a device for rapid engraving of clock dials. Figure 3 Enlarged view of point A in the middle; Figure 15 This invention relates to a device for rapid engraving of clock dials. Figure 4 Enlarged view of point B in the middle; Figure 16 This invention relates to a device for rapid engraving of clock dials. Figure 6 Enlarged view of point C in the middle; Figure 17 This invention relates to a device for rapid engraving of clock dials. Figure 7 Enlarged view at point D; Figure 18 This invention relates to a device for rapid engraving of clock dials. Figure 11 Enlarged view at point E in the middle; Figure 19 This invention relates to a device for rapid engraving of clock dials. Figure 13 Enlarged view at point F; Figure 20 This invention relates to a device for rapid engraving of clock dials. Figure 13 A magnified view of point G in the middle.

[0021] In the diagram: 1. Equipment support cabinet; 2. Rotary indexing transmission assembly; 201. Intermediate mounting shaft; 202. Bottom support frame; 203. Cam intermittent divider; 204. Servo drive motor; 205. Rotary indexing turntable; 206. Inner limit locking hole; 207. Outer limit slot; 208. Locking and positioning handle; 209. Intermediate mounting bracket; 210. Guide mounting groove; 211. Transmission mounting base; 212. Telescopic electric push rod; 21 3. Workpiece positioning mounting plate; 214. Elastic return spring; 215. Limiting fixed post; 216. Return movable post; 217. Workpiece positioning mounting slot; 218. Dial limit holder; 219. Adjusting threaded groove; 220. Alignment mounting screw hole; 221. First positioning adjustment knob; 222. Width adjustment screw groove; 223. Annular collection groove; 224. Adjusting support frame; 225. Width adjustment stud; 226. Operating handle; 227. Auxiliary limit... 228. Positioning contact; 229. Stepped mounting hole; 230. Alignment and disassembly hole; 231. Workpiece unloading top column; 232. Annular positioning mounting ring; 233. Buffer support spring; 234. Transmission connection frame; 235. Annular transmission belt; 236. Stepper drive motor; 37. Workpiece surface cleaning assembly; 301. Eccentric mounting frame; 302. Sensing element mounting bracket; 303. Proximity switch; 304. Height adjustment cylinder; 305. Rotary drive motor. 306. Cleaning storage tank; 307. Liquid transfer cylinder; 308. Cleaning sponge brush; 309. Positioning insertion hole; 310. Second positioning adjustment knob; 311. Upper lifting electric push rod; 312. Sealing block; 313. Inner limit stop block; 314. Guide channel; 315. Liquid conveying hole; 316. Flow equalization plate; 317. Hot air drying heater; 4. Main frame for mounting the whole machine; 5. Lifting drive cylinder; 6. Laser engraving device. Detailed Implementation

[0022] 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.

[0023] Example: Figures 1-20As shown, the present invention discloses a rapid engraving device for watch dials, comprising: an equipment support cabinet 1; a rotary indexing transmission component 2 for continuously conveying and removing watch dials is fixedly installed at the middle position of the upper surface of the equipment support cabinet 1; a workpiece surface cleaning component 3 for cleaning and drying the watch dial surface is provided at the left rear of the upper end face of the rotary indexing transmission component 2; a main machine mounting frame 4 is fixedly connected to the upper surface of the left end of the equipment support cabinet 1; a lifting drive cylinder 5 for controlling the movement in the Z-axis direction is fixedly installed on the right side of the upper end face of the main machine mounting frame 4; a laser engraving device 6 is fixedly installed on the piston rod at the lower end of the lifting drive cylinder 5 through a mounting plate, and the laser engraving device 6 is composed of a laser generator and a laser galvanometer.

[0024] The rotary indexing transmission assembly 2 includes an intermediate mounting shaft 201. The upper end of the intermediate mounting shaft 201 is embedded in a seat groove provided on the top of the equipment support cabinet 1 via a bearing with a built-in protrusion. A bottom support frame 202 is fixedly installed at the middle position of the bottom surface of the inner cavity of the equipment support cabinet 1. A cam intermittent divider 203 is fixedly installed on the upper surface of the bottom support frame 202 by several bolts. A servo drive motor 204 is fixedly installed on the right side of the front end of the cam intermittent divider 203 by several bolts. The output shaft at the left end of the servo drive motor 204 is fixedly connected to the output shaft in front of the cam intermittent divider 203 via a coupling. The upper part of the middle mounting shaft 201 is movably engaged with the rotary indexing turntable 205. The upper part of the middle mounting shaft 201 has an inner limit locking hole 206 on the front, and the center of the front of the rotary indexing turntable 205 has an outer limit slot 207. The inner cavity of the inner limit locking hole 206 and the inner cavity of the outer limit slot 207 are both threadedly connected to a locking and positioning handle 208.

[0025] A hexagonal intermediate mounting bracket 209 is fixedly connected to the center of the upper surface of the rotary indexing turntable 205. A guide mounting groove 210, corresponding to its vertical surface position, is arranged in a circular array around the outer periphery of the upper surface of the rotary indexing turntable 205. A transmission mounting base 211 is movably engaged within each guide mounting groove 210. A telescopic electric push rod 212 is fixedly mounted on each vertical inner wall of the intermediate mounting bracket 209. The ends of each telescopic electric push rod 212 that are furthest from each other are rotatably connected to the surface of each transmission mounting base 211 near the intermediate mounting bracket 209 via bearings. Each telescopic electric push rod 212 has a workpiece positioning mounting plate 213 fixedly connected to the surface of the end near the transmission mounting base 211. Each workpiece positioning mounting plate 213 has an elastic return spring 214 fixedly connected to the side away from the telescopic electric push rod 212. Each elastic return spring 214 is directly above the surface of the workpiece positioning mounting plate 213 and is fixedly connected to a limiting fixing post 215. Each transmission mounting base 211 has a return movable post 216 fixedly connected to the surface of the limiting fixing post 215, which overlaps with the surface of the limiting fixing post 215.

[0026] The system utilizes a cam intermittent divider 203, a servo drive motor 204, an intermediate mounting shaft 201, a rotary indexing turntable 205, a guide mounting groove 210, and an elastic return spring 214 in a coordinated manner. The servo drive motor 204 drives the cam intermittent divider 203 to perform intermittent indexing rotation. The intermediate mounting shaft 201 drives the rotary indexing turntable 205 to start, stop, and change positions at fixed points. After the transmission mounting base 211 slides along the guide mounting groove 210, it is automatically reset by the elastic return spring 214. The workstation switching is precise and stable, realizing continuous automated operation of the dial's cyclical flow.

[0027] Each transmission mounting base 211 has a workpiece positioning mounting groove 217 on its upper surface. Each workpiece positioning mounting groove 217 has a dial limit holder 218 that is movably engaged in the groove. Each dial limit holder 218 has an adjusting thread groove 219 on the surface of the end away from the intermediate mounting bracket 209. Each transmission mounting base 211 has an alignment mounting screw hole 220 on the surface of the end away from the intermediate mounting bracket 209 that corresponds to the position of the adjusting thread groove 219. Each alignment mounting screw hole 220 and the inner cavity of the adjusting thread groove 219 are threadedly connected to a first positioning adjustment knob 221.

[0028] The transmission mounting base 211, workpiece positioning mounting groove 217, dial limit holder 218, adjusting thread groove 219, alignment mounting screw hole 220, and first positioning adjustment knob 221 work together to first lock or loosen the dial by turning the first positioning adjustment knob 221. The dial limit holder 218 can be quickly inserted and removed from the workpiece positioning mounting groove 217. Then, the dial limit holder 218 automatically positions and limits the dial by its own contour cavity, without the need for manual recalibration, and can be adapted to the rapid changeover processing of dials of various specifications.

[0029] Each transmission mounting base 211 has a wide-spacing adjustment screw groove 222 at the center of the surface away from the intermediate mounting bracket 209. An annular collection groove 223 is fixedly connected to the outer wall of the intermediate mounting shaft 201 and the upper surface of the equipment support cabinet 1. An adjustment support frame 224 is fixedly connected to the left front of the upper end face of the annular collection groove 223. A wide-spacing adjustment stud 225 is engaged in the groove at the rear end of the adjustment support frame 224. An operating handle 226 is threadedly connected to the inner wall at the front end of the wide-spacing adjustment stud 225. An auxiliary limit contact 227 is fixedly connected to the rear end of the wide-spacing adjustment stud 225.

[0030] Each transmission mounting base 211 has a stepped mounting hole 228 at the center of its upper surface, which communicates with the inner cavity of the wide-spacing adjusting screw groove 222. Each dial limit holder 218 has an alignment and disassembly hole 229 at the center of its upper surface, which communicates with the inner cavity of the stepped mounting hole 228. Each stepped mounting hole 228 and alignment and disassembly hole 229 has a workpiece unloading top post 230 inserted into its inner cavity. Each workpiece unloading top post 230 has an annular positioning mounting ring 231 fixedly connected to its lower surface. Each annular positioning mounting ring 231 has a buffer support spring 232 fixedly connected to its upper surface, which is located in the inner cavity of the stepped mounting hole 228.

[0031] The workpiece unloading top column 230, stepped mounting hole 228, alignment and disassembly hole 229, annular positioning mounting ring 231, and buffer support spring 232 work together. When the lower hemispherical arc surface of the workpiece unloading top column 230 is laterally abutted, it performs a vertical extension and retraction pushing action along the stepped mounting hole 228 and alignment and disassembly hole 229. The buffer support spring 232 simultaneously and elastically buffers and dissipates the force, resulting in smooth overall movement without jamming. This avoids damage to the dial from rigid hard tops and effectively protects the integrity of the precision dial's appearance.

[0032] The upper surfaces of both ends of the equipment support cabinet 1 are fixedly connected to a transmission connection frame 233 that penetrates the outer surface of the annular collection trough 223. An annular transmission belt 234 is movably sleeved on the surface of the transmission connection frame 233 and its roller. A stepper drive motor 235 is fixedly installed on the front of the left end of the transmission connection frame 233, and the output shaft of the rear end of the stepper drive motor 235 is fixedly connected to the extended end of the roller on the left side of the transmission connection frame 233 through a coupling.

[0033] The system utilizes a telescopic electric push rod 212, a transmission mounting base 211, a width-pitch adjustment screw groove 222, a width-pitch adjustment stud 225, an auxiliary limit contact 227, a workpiece unloading top column 230, and a buffer support spring 232 in coordination. First, the telescopic electric push rod 212 performs a radial telescopic pushing action, causing the transmission mounting base 211 to slide along the guide groove. The width-pitch adjustment screw groove 222 and the width-pitch adjustment stud 225 then complete a 180° rotation through threaded transmission. Simultaneously, the auxiliary limit contact 227 abuts against the lower spherical surface of the workpiece unloading top column 230, driving the workpiece unloading top column 230 to perform a vertical extension action. The rotation and unloading are synchronized, eliminating dial jamming, eliminating the need for additional rotary drive components, resulting in a simplified structure, energy saving, and stable operation.

[0034] The workpiece surface cleaning assembly 3 includes an eccentric mounting frame 301. The lower end of the eccentric mounting frame 301 is fixedly connected to the left rear of the upper end face of the annular collection groove 223. A sensor element mounting bracket 302 with its own mounting hole is fixedly connected to the front of the lower end of the eccentric mounting frame 301. A proximity switch 303 is fixedly installed in the mounting hole at the front end of the sensor element mounting bracket 302.

[0035] A height adjustment cylinder 304 is fixedly installed on the upper surface of the front end of the eccentric mounting frame 301. A rotary drive motor 305 is fixedly installed on the lower end of the height adjustment cylinder 304 via a mounting plate. A cleaning liquid storage tank 306 is fixedly connected to the lower end of the rotary drive motor 305 via a mounting plate. A liquid transfer cylinder 307 is fixedly connected to the middle of the lower surface of the cleaning liquid storage tank 306. A cleaning sponge brush 308 is movably inserted into the inner cavity of the lower end of the liquid transfer cylinder 307. Two positioning holes 309 with corresponding positions are opened on the left side of the lower end of the liquid transfer cylinder 307 and the left side of the cleaning sponge brush 308. A second positioning adjustment knob 310 is threaded into the positioning holes 309 at both the front and rear.

[0036] The system utilizes a liquid transfer cylinder 307, an inverted V-shaped uniform flow distribution plate 316, an array of strip-shaped holes, a liquid delivery hole 315, and a cleaning sponge brush 308 in a coordinated manner. First, the cleaning liquid drips down through the liquid delivery hole 315, then flows to both sides on the inverted V-shaped uniform flow distribution plate 316, and then seeps down layer by layer through the array of strip-shaped holes at a uniform speed, ensuring that the cleaning sponge brush 308 is evenly wetted. Then, the cleaning sponge brush 308 performs a flexible and uniform wiping of the dial surface as it rotates, ensuring stable liquid volume and no excess water residue, thus improving the pre-treatment cleaning quality of the dial.

[0037] An upper lifting electric push rod 311 is fixedly installed on the rear end face of the cleaning liquid storage tank 306. A sealing block 312 is fixedly connected to the front end of the upper lifting electric push rod 311. An inner limiting block 313 is fixedly connected to the bottom surface of the inner cavity of the cleaning liquid storage tank 306 directly behind the sealing block 312. A guide groove 314 is opened at the center of the back of the lower end of the sealing block 312. A liquid conveying hole 315 extending downward to the center of the bottom surface is opened on the bottom surface of the front inner cavity of the cleaning liquid storage tank 306. V-shaped flow equalization and dispersing plates 316 are fixedly connected to the inner walls of both sides of the upper end of the liquid transfer cylinder 307. A hot air drying heater 317 is fixedly installed in the middle of both sides of the liquid transfer cylinder 307 through a mounting plate.

[0038] The system integrates an eccentric mounting frame 301, a proximity switch 303, a height adjustment cylinder 304, a rotary drive motor 305, a cleaning liquid storage tank 306, a cleaning sponge brush 308, and a hot air drying heater 317. When the proximity switch 303 detects the position, the height adjustment cylinder 304 drives the cleaning sponge brush 308 to move up and down to meet the surface. The rotary drive motor 305 drives the cleaning sponge brush 308 to rotate and clean. After cleaning, the hot air drying heater 317 delivers directional airflow for dehumidification. This integrated system completes the cleaning, dust removal, and drying pretreatment of the dial, avoiding defects such as burrs, burnt edges, and peeling of the plating caused by laser engraving.

[0039] During operation, the equipment support cabinet 1 provides a stable load-bearing foundation for the entire machine. The rotary indexing transmission component 2 is installed in the middle of the upper surface of the equipment support cabinet 1, serving as the core component for the dial's cyclic conveying. The servo drive motor 204 starts and drives the cam intermittent divider 203 to operate through the coupling. The cam intermittent divider 203 drives the intermediate mounting shaft 201 to perform precise intermittent indexing rotation, which in turn drives the rotary indexing turntable 205 to synchronously achieve fixed-point stopping and rotation, completing the precise alignment and switching of each workstation and ensuring the timing matching of subsequent processes. A regular hexagonal central mounting bracket 209 is fixed on the upper surface of the rotary indexing turntable 205. Guide mounting grooves 210 are formed in a circular array around its periphery. The transmission mounting base 211 is movably engaged in the guide mounting groove 210 and can slide radially back and forth along the groove to achieve radial movement guidance and limit. Each vertical inner wall of the central mounting bracket 209 is fixed with a telescopic electric push rod 212. The end of the telescopic electric push rod 212 away from the central mounting bracket 209 is rotatably connected to the end of the transmission mounting base 211. When the telescopic electric push rod 212 is telescopic, it can drive the transmission mounting base 211 to slide radially along the guide mounting groove 210. The workpiece positioning mounting plate 213 is fixed to the end of the telescopic electric push rod 212. The limiting fixing column 215 is vertically set on the surface of the workpiece positioning mounting plate 213. The return movable column 216 is fixed to the end of the transmission mounting base 211. The elastic return spring 214 is sleeved between the limiting fixing column 215 and the return movable column 216. After the transmission mounting base 211 slides, the elastic return spring 214 provides a rebound force to realize its automatic and accurate reset, ensuring the stability of the station cycle action. The upper surface of the transmission mounting base 211 is provided with a workpiece positioning mounting groove 217. The dial limit holder 218 is movably engaged inside the workpiece positioning mounting groove 217. The dial limit holder 218 has a cavity inside that perfectly matches the shape of the dial to be processed. The dial can be directly inserted into the cavity to achieve automatic contouring and precise fixing without additional adjustment and positioning. When it is necessary to change the specifications of the dial, turn the first positioning adjustment knob 221 so that its deep end disengages from the adjustment threaded groove 219 on the dial limit holder 218 and retracts completely into the alignment mounting screw hole 220 on the transmission mounting base 211. This releases the locking state of the dial limit holder 218, allowing the worker to quickly remove the dial limit holder 218 from the workpiece positioning mounting slot 217 and replace it with a dial limit holder 218 for the corresponding cavity. After replacement, turn the first positioning adjustment knob 221 in the opposite direction so that it re-screws into the adjustment threaded groove 219, thus completing the locking and fixing of the dial limit holder 218 and quickly completing the processing adaptation of dials of different specifications. When the rotary indexing turntable 205 drives the dial limit holder 218, which holds the dial, to the position below the workpiece surface cleaning component 3, the proximity switch 303 senses that the dial is in position and sends a signal to trigger the workpiece surface cleaning component 3 to start. The height adjustment cylinder 304 descends, driving the rotary drive motor 305 and the cleaning liquid tank 306 to descend synchronously, so that the cleaning sponge brush 308 fits against the upper surface of the dial; the rotary drive motor 305 starts, driving the cleaning liquid tank 306 and the liquid transfer cylinder 307 to rotate at low speed, thereby driving the cleaning sponge brush 308 to perform flexible rotary cleaning of the dial surface, removing surface dust, oil and other impurities; The cleaning fluid is stored inside the liquid storage tank 306. The upper lifting electric push rod 311 moves the sealing block 312 back and forth, controlling the opening and closing of the liquid delivery hole 315. The cleaning fluid flows into the liquid transfer cylinder 307 through the liquid delivery hole 315 and is evenly distributed to the cleaning sponge brush 308 by the V-shaped distribution plate 316, keeping the brush moist to improve cleaning effect. The positioning insertion hole 309 cooperates with the second positioning adjustment knob 310 to achieve quick disassembly and replacement of the cleaning sponge brush 308, ensuring long-term cleaning effectiveness. After cleaning, the height adjustment cylinder 304 lifts and resets the cleaning mechanism, and the hot air drying heater 317 starts, directionally drying the dial surface with warm air to remove residual moisture and complete the pre-treatment before engraving. After preprocessing, the rotary indexing turntable 205 continues to rotate, moving the dial to the work position directly below the laser engraving device 6. The main frame 4 of the whole machine provides installation support for the lifting drive cylinder 5. The lifting drive cylinder 5 drives the laser engraving device 6 to make Z-axis vertical height adjustment to adapt to the engraving focal length of dials of different thicknesses. The laser engraving device 6 completes the laser engraving operation of the specified content on the dial surface that is precisely stopped through the cooperation of the laser generator and the laser galvanometer. After engraving is completed, the rotary indexing turntable 205 transfers the dial to the unloading station. The unloading process is achieved simultaneously by the driving force of a single telescopic electric push rod 212, realizing a dual-force unloading action. The telescopic electric push rod 212 extends outward, pushing the transmission mounting base 211 to slide outward along the guide mounting groove 210. The width adjustment screw groove 222 on the side of the transmission mounting base 211 gradually approaches the fixed width adjustment stud 225 and the auxiliary limit contact 227. The width adjustment stud 225 and the width adjustment screw groove 222 are engaged by a large-pitch thread. Under the action of radial thrust, the transmission mounting base 211 is driven to rotate 180 degrees around the connecting end, so that the dial limit holder 218 and the internal dial are simultaneously rotated to the opening-facing state, completing the first step of rotation unloading. Gravity is then used to make the dial initially fall. An extension chamber is provided inside the wide-pitch adjusting screw groove 222, which corresponds to the position directly below the stepped mounting hole 228. The auxiliary limiting contact 227 has a cylindrical structure. As the transmission mounting base 211 slides, the auxiliary limiting contact 227 gradually extends into the extension chamber of the wide-pitch adjusting screw groove 222. The lower end of the workpiece unloading top column 230 is a hemispherical arc surface, which extends into the extension chamber of the wide-pitch adjusting screw groove 222. After the auxiliary limiting contact 227 extends into the chamber, it contacts the hemispherical arc surface at the lower end of the workpiece unloading top column 230 and generates a pushing force. The hemispherical arc surface design ensures smooth sliding and push, and avoids jamming. Under the pushing action of the auxiliary limiting contact 227, the workpiece unloading top column 230 extends and retracts upward along the stepped mounting hole 228 and the alignment and disassembly hole 229. Its upper end pushes upward and directly pushes the bottom of the dial, applying a pushing force to the dial that is stuck in the cavity of the dial limiting seat 218 due to friction, thus completing the second step of unloading. This process relies solely on the driving force of a single telescopic electric push rod 212 to simultaneously achieve 180-degree rotation gravity unloading and workpiece unloading top column 230 pushing unloading. The dual forces work together to ensure that the dial is completely discharged, eliminating the problem of jamming. At the same time, no additional power components are required, reducing power consumption and simplifying the equipment structure. During the unloading process, the buffer support spring 232, in conjunction with the annular positioning mounting ring 231, provides flexible buffering for the workpiece unloading top column 230, preventing excessive pushing force from damaging the dial. After unloading is completed, the telescopic electric push rod 212 retracts, the elastic return spring 214 drives the transmission mounting base 211 to reset, the width adjustment stud 225 disengages from the width adjustment screw groove 222, the transmission mounting base 211 rotates to reset, and the workpiece unloading top column 230 retracts downwards to reset under the action of the buffer support spring 232, waiting for the next unloading cycle. The transmission connection frame 233 and the annular transmission belt 234 at both ends of the equipment support cabinet 1 are linked and operated under the drive of the stepper drive motor 235, which automatically conveys the finished dials that fall into the annular collection trough 223. The equipment cycles back and forth, continuously completing the fully automated continuous feeding, cleaning and dehumidification, laser engraving, dual-force unloading, and finished product conveying of the dials.

[0040] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention 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 the present invention should be included within the protection scope of the present invention.

Claims

1. A device for rapid engraving on a watch dial, characterized in that, include: The equipment support cabinet (1) has a rotary indexing transmission assembly (2) for continuously conveying and removing the dial at the middle position of the upper surface of the equipment support cabinet (1). A workpiece surface cleaning assembly (3) for cleaning and drying the dial surface is provided on the left rear side of the upper end of the rotary indexing transmission assembly (2). A whole machine mounting frame (4) is fixedly connected to the upper surface of the left end of the equipment support cabinet (1). A lifting drive cylinder (5) for controlling the movement in the Z-axis direction is fixedly installed on the right side of the upper end of the whole machine mounting frame (4). A laser engraving device (6) is fixedly installed on the piston rod at the lower end of the lifting drive cylinder (5) through a mounting plate. The laser engraving device (6) is composed of a laser generator and a laser galvanometer.

2. The watch dial rapid engraving device according to claim 1, characterized in that, The rotary indexing transmission assembly (2) includes an intermediate mounting shaft (201). The upper end of the intermediate mounting shaft (201) is embedded in a seat groove set on the top of the equipment support cabinet (1) through a bearing with a built-in protrusion. A bottom support frame (202) is fixedly installed at the middle position of the bottom surface of the inner cavity of the equipment support cabinet (1). A cam intermittent divider (203) is fixedly installed on the upper surface of the bottom support frame (202) by several bolts. A servo drive motor (204) is fixedly installed on the right side of the front end of the cam intermittent divider (203) by several bolts. The output shaft at the left end of the servo drive motor (204) is fixedly connected to the output shaft in front of the cam intermittent divider (203) via a coupling. The upper end of the intermediate mounting shaft (201) is movably engaged with the rotary indexing turntable (205). The upper end of the intermediate mounting shaft (201) has an inner limit locking hole (206) on its front side, and the center of the front side of the rotary indexing turntable (205) has an outer limit slot (207). The inner cavity of the inner limit locking hole (206) and the outer limit slot (207) are both threadedly connected with locking and positioning handles (208).

3. The watch dial rapid engraving device according to claim 2, characterized in that, A hexagonal intermediate mounting bracket (209) is fixedly connected to the center of the upper surface of the rotary indexing turntable (205). A guide mounting groove (210) corresponding to the vertical surface position is arranged in a circular array around the outer periphery of the upper surface of the rotary indexing turntable (205). A transmission mounting base (211) is movably engaged within each guide mounting groove (210). A telescopic electric push rod (212) is fixedly mounted on each vertical inner wall of the intermediate mounting bracket (209). The ends of each telescopic electric push rod (212) that are furthest from each other are rotatably connected to the surface of each transmission mounting base (211) near the intermediate mounting bracket (209) via bearings. Each telescopic electric push rod (212) has a workpiece positioning mounting plate (213) fixedly connected to the surface of the end near the transmission mounting base (211). Each workpiece positioning mounting plate (213) has an elastic return spring (214) fixedly connected to the side away from the telescopic electric push rod (212). Each elastic return spring (214) is fixedly connected to a limiting fixing post (215) directly above the surface of the workpiece positioning mounting plate (213). Each transmission mounting base (211) has a return movable post (216) fixedly connected to the surface of the limiting fixing post (215) on the surface of the end near the middle mounting bracket (209).

4. The watch dial rapid engraving device according to claim 3, characterized in that, Each of the transmission mounting bases (211) has a workpiece positioning mounting groove (217) on its upper surface. Each of the workpiece positioning mounting grooves (217) has a dial limit holder (218) that is movably engaged in the groove. Each of the dial limit holders (218) has an adjustment thread groove (219) on the surface of the end away from the intermediate mounting bracket (209). Each of the transmission mounting bases (211) has an alignment mounting screw hole (220) on the surface of the end away from the intermediate mounting bracket (209) that corresponds to the position of the adjustment thread groove (219). Each alignment mounting screw hole (220) and the inner cavity of the adjustment thread groove (219) are threadedly connected to a first positioning adjustment knob (221).

5. The watch dial rapid engraving device according to claim 4, characterized in that, Each of the transmission mounting bases (211) has a wide-spacing adjustment screw groove (222) at the center of the side surface away from the intermediate mounting bracket (209). The outer wall of the intermediate mounting shaft (201) and the upper surface of the equipment support cabinet (1) are fixedly connected to an annular collection groove (223). An adjustment support frame (224) is fixedly connected to the left front of the upper end face of the annular collection groove (223). A wide-spacing adjustment stud (225) is snapped into the groove at the rear end of the adjustment support frame (224). An operating handle rod (226) is threadedly connected to the inner wall of the front end of the wide-spacing adjustment stud (225). An auxiliary limit contact (227) is fixedly connected to the rear end of the wide-spacing adjustment stud (225).

6. The watch dial rapid engraving device according to claim 5, characterized in that, Each of the transmission mounting bases (211) has a stepped mounting hole (228) at the center of its upper end face that communicates with the inner cavity of the wide-spacing adjusting screw groove (222). Each of the dial limit holders (218) has an alignment and disassembly hole (229) at the center of its upper surface that communicates with the inner cavity of the stepped mounting hole (228). Each of the stepped mounting holes (228) and the inner cavity of the alignment and disassembly hole (229) has a workpiece unloading top post (230) inserted into it. Each of the workpiece unloading top posts (230) has an annular positioning mounting ring (231) fixedly connected to the lower end surface of it. Each of the annular positioning mounting rings (231) has a buffer support spring (232) fixedly connected to the upper end face of it, which is located in the inner cavity of the stepped mounting hole (228).

7. The watch dial rapid engraving device according to claim 6, characterized in that, The upper surfaces of both ends of the equipment support cabinet (1) are fixedly connected to a transmission connection frame (233) that penetrates the outer surface of the annular collection groove (223). The transmission connection frame (233) is movably sleeved with an annular transmission belt (234) on the surface of its roller shaft. A stepper drive motor (235) is fixedly installed on the front of the left end of the transmission connection frame (233), and the output shaft of the rear end of the stepper drive motor (235) is fixedly connected to the roller shaft extension end on the left side of the transmission connection frame (233) through a coupling.

8. The watch dial rapid engraving device according to claim 7, characterized in that, The workpiece surface cleaning assembly (3) includes an eccentric mounting frame (301), the lower end of which is fixedly connected to the left rear of the upper end face of the annular collection groove (223), and a sensor element mounting bracket (302) with a mounting hole is fixedly connected to the front of the lower end of the eccentric mounting frame (301). A proximity switch (303) is fixedly installed in the mounting hole at the front end of the sensor element mounting bracket (302).

9. A rapid engraving device for a watch dial according to claim 8, characterized in that, A height adjustment cylinder (304) is fixedly installed on the upper surface of the front end of the eccentric mounting frame (301). A rotary drive motor (305) is fixedly installed on the lower end of the height adjustment cylinder (304) through a mounting plate. A cleaning liquid storage tank (306) is fixedly connected to the lower end of the rotary drive motor (305) through a mounting plate. A liquid transfer cylinder (307) is fixedly connected to the middle position of the lower surface of the cleaning liquid storage tank (306). A cleaning sponge brush (308) is movably inserted into the inner cavity of the lower end of the liquid transfer cylinder (307). Two positioning holes (309) with corresponding positions are opened on the left side of the lower end of the liquid transfer cylinder (307) and the left side of the cleaning sponge brush (308). A second positioning adjustment knob (310) is threaded into the positioning holes (309) at both the front and rear.

10. A rapid engraving device for a watch dial according to claim 9, characterized in that, The rear end face of the cleaning liquid storage tank (306) is fixedly installed with an upper lifting electric push rod (311). The front end of the upper lifting electric push rod (311) is fixedly connected with a sealing block (312). The sealing block (312) is provided with an inner limiting block (313) fixedly connected to the bottom surface of the inner cavity of the cleaning liquid storage tank (306) directly behind it. A guide groove (314) is provided at the center of the back of the lower end of the sealing block (312). The bottom surface of the inner cavity at the front end of the cleaning liquid storage tank (306) is provided with a liquid conveying hole (315) extending downward to the center of its bottom surface. The inner walls of the upper two sides of the liquid transfer cylinder (307) are fixedly connected with V-shaped flow equalization and distribution plates (316). A hot air drying heater (317) is fixedly installed at the middle of both sides of the liquid transfer cylinder (307) by a mounting plate.

Images