Laser positioning cutting device for automobile lamp lens

Abstract

The laser positioning cutting device for the automobile lamp lens comprises a base, and two transverse sliding rails are oppositely and fixedly connected to the two sides of the base; a longitudinal guide rail is connected between the two transverse slide rails in a sliding manner; the top of the longitudinal guide rail is slidably connected with a laser cutting machine, and the longitudinal guide rail and the laser cutting machine are both driven by a linear module. A negative-pressure channel is formed in the base, and one end of the negative-pressure channel extends out of the base; limiting mechanisms are inserted into the positioning insertion holes, each limiting mechanism comprises a bottom block, the positioning insertion holes are formed in the base at equal intervals, and after the limiting mechanisms are inserted, horizontal displacement of the lens is limited through physical constraint of the positioning insertion holes; meanwhile, the vacuum suction cup is matched with the sealing ring, uniform adsorption force is formed on the bottom of the lens, shaking caused by vibration and uneven weight during cutting is prevented through double effects, and it is ensured that the cutting track is consistent with the design contour of the lens; the limiting mechanism is installed in an insertion mode, and when lenses of different specifications are replaced, insertion hole combinations can be rapidly adjusted and positioned, and universality and efficiency are both considered.

Description

Technical Field

[0001] This invention belongs to the technical field of cutting and positioning equipment, and specifically relates to a laser positioning and cutting device for automotive headlight lenses. Background Technology

[0002] With the development of automotive lighting technology, headlight lenses, as core optical components for focusing and transmitting light, face increasingly stringent requirements regarding cutting precision, such as contour dimensions, surface flatness, and optical performance. Laser cutting, due to its advantages of being non-contact and having a small heat-affected zone, has become the mainstream process for manufacturing headlight lenses. However, in existing technologies, the platform of laser cutting equipment often adopts a honeycomb platform, a porous support structure composed of dense small holes or a grid. Its initial design intention was to reduce thermal deformation during cutting by dispersing the support points.

[0003] However, the cellular platform only provides bottom support and cannot position the lens circumferentially or radially. During the cutting process, the lens is prone to horizontal swaying or displacement due to equipment vibration and weight imbalance between the cut and uncut areas, such as local cutting and falling off. Lens shaking can cause the cutting trajectory to deviate, the edge to crack or the surface to scratch, directly affecting the accuracy of its focusing point, such as light spot distortion and light transmittance, and in severe cases, causing the product to be scrapped. Furthermore, the support position needs to be adjusted frequently for lenses of different specifications, which is cumbersome and makes it difficult to ensure consistent positioning.

[0004] Therefore, there is an urgent need for a laser positioning and cutting device that combines precise positioning, stable clamping, and anti-vibration interference functions to solve the problem of insufficient positioning of traditional honeycomb platforms and ensure the cutting quality and optical performance of automotive headlight lenses. Summary of the Invention

[0005] The purpose of this invention is to provide a laser positioning and cutting device for automotive headlight lenses in order to solve the above-mentioned problems. The base has equidistant positioning holes. After the limiting mechanism is inserted, the horizontal displacement of the lens is restricted by the physical constraint of the positioning holes. At the same time, the vacuum suction cup and the sealing ring cooperate to form a uniform adsorption force on the bottom of the lens. The dual function prevents shaking caused by vibration and uneven weight during cutting, and ensures that the cutting trajectory is consistent with the design contour of the lens.

[0006] The design of the flexible bellows, movable sealing ring, and connecting pipe allows the equipment to adapt to lenses of different thicknesses, maintaining a tight fit between the sealing ring and the bottom surface of the lens. The piston-type one-way valve only opens to connect the negative pressure channel during lifting and is normally closed to prevent air leakage, ensuring a continuous and stable negative pressure adsorption force and avoiding lens loosening due to pressure fluctuations during cutting.

[0007] The synergistic effect of limiting and adsorption reduces displacement error and surface damage during lens cutting, avoids reduced light focusing effect and light transmittance due to edge chipping and scratches, and significantly improves the optical quality and yield of automotive headlight lenses.

[0008] The limiting mechanism is installed via a plug-in connection, allowing for quick adjustment of the positioning socket combination when replacing lenses of different specifications, thus balancing versatility and efficiency.

[0009] To address the above problems, the present invention provides a technical solution: A laser positioning and cutting device for automotive headlight lenses includes a base with two transverse slide rails fixedly connected to its two sides. A longitudinal guide rail is slidably connected between the two transverse slide rails; A laser cutting machine is slidably connected to the top of the longitudinal guide rail, and both the longitudinal guide rail and the laser cutting machine are driven by a linear module. The base has a negative pressure channel inside, one end of which extends to the outside of the base. The base is provided with several positioning holes at equal intervals on one side of the negative pressure channel; A limiting mechanism is inserted into the positioning socket, and the limiting mechanism includes a bottom block.

[0010] As a preferred embodiment of the present invention, the positioning hole penetrates through the base, and a connecting channel is provided in the middle of the base; The connecting channel connects the positioning socket and the negative pressure channel.

[0011] As a preferred embodiment of the present invention, each of the connecting channels is fixedly connected to a support bucket at its bottom; A sealing plug is fixedly connected to the bottom of the base block, and the sealing plug is inserted into the support bucket for sealing.

[0012] As a preferred embodiment of the present invention, each of the connecting channels is fixedly connected with a piston-type check valve of model YCVS8-33GSHC-1, with its actuating rod facing the positioning socket.

[0013] As a preferred embodiment of the present invention, an elastic corrugated pipe is fixedly connected to the top of the bottom block; A sealing ring that can move up and down is connected above the elastic bellows; A vacuum suction cup is fixedly connected to the top of the sealing ring.

[0014] As a preferred embodiment of the present invention, a ventilation channel is provided between the middle sidewall and the top of the bottom block; A connecting pipe is fixedly connected to the top of the elastic corrugated pipe, and the connecting pipe moves up and down as the elastic corrugated pipe expands and contracts. The sealing ring has a sealing ring at the bottom and a through pipe fixedly connected to its middle part; The top of the tube passes through a vacuum suction cup, and the bottom passes through a sealing ring and is connected to a connecting tube.

[0015] The beneficial effects of this invention are as follows: the base has equidistant positioning holes, and after the limiting mechanism is inserted, the horizontal displacement of the lens is restricted by the physical constraint of the positioning holes; at the same time, the vacuum suction cup and the sealing ring cooperate to form a uniform adsorption force on the bottom of the lens, which has a dual effect to prevent shaking caused by vibration and uneven weight during cutting, and ensures that the cutting trajectory is consistent with the design contour of the lens.

[0016] The design of the flexible bellows, movable sealing ring, and connecting pipe allows the equipment to adapt to lenses of different thicknesses, maintaining a tight fit between the sealing ring and the bottom surface of the lens. The piston-type one-way valve only opens to connect the negative pressure channel during lifting and is normally closed to prevent air leakage, ensuring a continuous and stable negative pressure adsorption force and avoiding lens loosening due to pressure fluctuations during cutting.

[0017] The synergistic effect of limiting and adsorption reduces displacement error and surface damage during lens cutting, avoids reduced light focusing effect and light transmittance due to edge chipping and scratches, and significantly improves the optical quality and yield of automotive headlight lenses.

[0018] The limiting mechanism is installed via a plug-in connection, allowing for quick adjustment of the positioning socket combination when replacing lenses of different specifications, thus balancing versatility and efficiency. Attached Figure Description

[0019] For ease of explanation, the present invention will be described in detail below with reference to specific embodiments and accompanying drawings.

[0020] Figure 1 This is a three-dimensional structural diagram of a preferred embodiment of the present invention; Figure 2 This is a schematic diagram of the base according to a preferred embodiment of the present invention; Figure 3 This is a cross-sectional structural diagram of the base according to a preferred embodiment of the present invention; Figure 4 This is an enlarged structural diagram of point A in a preferred embodiment of the present invention; Figure 5 This is a cross-sectional structural diagram of a limiting mechanism according to a preferred embodiment of the present invention.

[0021] In the diagram: 1. Base; 2. Horizontal slide rail; 3. Vertical guide rail; 4. Laser cutting machine; 5. Positioning socket; 6. Limiting mechanism; 7. Negative pressure channel; 8. Connecting channel; 9. Piston-type one-way valve; 10. Sealing plug; 11. Base block; 12. Vent; 13. Elastic bellows; 14. Connecting pipe; 15. Sealing ring; 16. Through pipe; 17. Vacuum suction cup; 18. Support bucket. Detailed Implementation

[0022] like Figure 1-5 As shown, this specific embodiment adopts the following technical solution: a laser positioning and cutting device for automotive headlight lenses, including a base and a guide rail system: The base 1 is integrally formed from cast iron or aluminum alloy, serving as the basic frame of the equipment. A negative pressure channel 7 is formed along its length inside the base 1. The cross-section of the negative pressure channel 7 is S-shaped, allowing for the connection of more positioning holes 5 within the base 1. One end of the channel is connected to an external vacuum pump via a flange, while the other end is sealed. Two transverse slide rails 2 are welded opposite each other along the width direction on the upper surface of the base 1. Dovetail grooves are machined on the inner sides of the two transverse slide rails 2.

[0023] The longitudinal guide rail 3 is a long strip guide rail with an "I" shaped cross section. It is slidably connected to the dovetail groove of the transverse slide rail 2 through the sliders at both ends to achieve longitudinal movement. The longitudinal guide rail 3 is driven by an independent linear module and can slide left and right along the transverse slide rail 2.

[0024] The laser cutting machine 4 is fixed on the slider at the top of the longitudinal guide rail 3. It is also driven by the linear module and can move back and forth along the longitudinal guide rail 3. The cutting head is facing the upper surface of the base 1.

[0025] Positioning insertion hole 5 is located on the upper surface of base 1. Several through holes are equally spaced along one side of negative pressure channel 7, and the axis of the through holes is perpendicular to the upper surface of base.

[0026] The connecting channel 8 has a radial through hole in the middle side wall of each positioning hole 5, connecting the positioning hole 5 with the negative pressure channel 7 inside the base, forming an airflow path of "positioning hole-connecting channel-negative pressure channel".

[0027] The support hopper 18 has a funnel-shaped metal hopper welded to the bottom of each connecting channel 8. The upper diameter matches the connecting channel, and the lower diameter is slightly smaller than the connecting channel. This hopper is used to receive the sealing plug of the limiting mechanism.

[0028] The piston-type check valve 9 is a YCVS8-33GSHC-1 piston-type check valve, which is fixed inside the connecting channel 8 by bolts, with its actuating rod facing the positioning socket 5.

[0029] Limiting mechanism 6 and adsorption component The limiting mechanism 6 consists of a base block 11, a sealing plug 10, an elastic bellows 13, a sealing ring 15, a vacuum suction cup 17, etc.

[0030] A sealing plug 10 is welded to the center of the bottom of the bottom block 11 to achieve a seal when the support bucket 18 is inserted; a ventilation channel 12 is opened between the middle side wall and the top of the bottom block 11 to connect the internal cavity of the bottom block with the upper surface.

[0031] The expandable corrugated pipe 13 made of fluororubber is connected to the top of the base block 11 by a flange seal at its lower end and welded to the connecting pipe 14 at its upper end.

[0032] The sealing ring 15 has an O-ring embedded at the bottom and a vertically fixed through pipe 16 in the middle; the sealing ring 15 is connected to the upper end of the elastic bellows 13 through the connecting pipe 14 and can move up and down with the expansion and contraction of the elastic bellows.

[0033] The vacuum suction cup 17 is fixed to the top of the sealing ring 15 by bolts, and its central hole is connected to the top of the through pipe 16.

[0034] Specifically: A laser positioning and cutting device for automotive headlight lenses. In use, firstly, according to the lens model, the limiting mechanism 6 is inserted at equal intervals into the positioning holes 5 of the base 1; the bottom block 11 is inserted vertically along the upper opening of the positioning hole 5, so that the bottom block 11 moves downward until the sealing plug 10 is inserted into the support bucket 18 at the bottom of the connecting channel 8 and is tightly connected; the bottom of the bottom block 11 directly contacts and squeezes the starting rod of the piston-type one-way valve 9, overcoming the built-in spring force of the one-way valve, and fully opening the valve port. At this time, the negative pressure channel 7 is connected to the connecting channel 8.

[0035] Lens Placement and Adsorption Formation: Place the headlight lens to be cut on the upper surface of the vacuum suction cup 17, ensuring that the bottom surface is completely in contact with the suction cup. Since the one-way valve is open, the negative pressure passes sequentially through: negative pressure channel 7 → connecting channel 8 → support bucket 18 → positioning insertion hole 5 → vent 12 of bottom block 11 → elastic bellows 13 → connecting pipe 14 → through pipe 16 → vacuum suction cup 17, and finally acts on the bottom surface of the lens to form a uniform adsorption force. The adsorption force is adjusted by the vacuum pump.

[0036] Adaptive sealing: The elastic bellows 13 naturally expands and contracts with the insertion depth of the bottom block 11, causing the sealing ring 15 and the vacuum suction cup 17 to move up and down until the bottom sealing ring of the sealing ring 15 is in close contact with the edge of the lens, ensuring that there is no leakage during adsorption.

[0037] The lens cutting contour is input into the control system, and the XY axis movement trajectory of the laser cutting machine 4 is set, which is driven by the linear module of the transverse slide rail 2 and the longitudinal guide rail 3.

[0038] Limiting and anti-shaking: The limiting mechanism 6 restricts the horizontal displacement of the lens by connecting the bottom block 11 to the positioning hole 5; the suction force of the vacuum suction cup 17 counteracts the cutting vibration and uneven weight of local cutting and falling off, ensuring that the lens does not shake.

[0039] Small waste materials generated during cutting, such as scraps, fall directly out through the bottom of the through-hole 5 due to gravity, avoiding accumulation that could affect subsequent cutting.

[0040] After the limit mechanism is inserted, the piston-type one-way valve 9 remains open, and the negative pressure continues to act on the suction cup through the air passage 12, the elastic bellows 13 and other paths to maintain a stable adsorption force.

[0041] After cutting, pull the limiting mechanism 6 out of the positioning hole 5: When the check valve is closed, the bottom block 11 is released from the pressure on the starter rod, and the check valve 9 is reset under the action of the spring force, closing the valve port and cutting off the connection between the negative pressure channel 7 and the connecting channel 8.

[0042] As the bottom block 11 is pulled out, the sealing plug 10 is removed from the support bucket 18, and the channel 8 and the positioning hole 5 are temporarily sealed through the support bucket 18; the elastic bellows 13 contracts, and the sealing ring 15 and the suction cup 17 separate from the lens.

[0043] Remove the cut lens directly from the suction cup 17; clean the remaining waste through the lower opening of the positioning hole 5, replace with a new lens and repeat the above process.

[0044] The positioning socket (5) and the limiting mechanism (6) restrict horizontal swaying, and the vacuum suction cup (17) adsorbs and cancels the vibration, thereby improving the cutting accuracy and meeting the optical performance requirements of the car lamp lens. The combination of the flexible bellows (13) and the piston-type one-way valve (9) ensures the sealing and adsorption stability of lenses of different thicknesses, and improves the yield rate.

[0045] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the present invention. Various changes and modifications can be made to the present invention without departing from its spirit and scope. All such changes and modifications fall within the scope of the present invention as claimed, which is defined by the appended claims and their equivalents.

Claims

1. A laser positioning and cutting device for automotive headlight lenses, characterized in that, Includes a base (1), on which two transverse slide rails (2) are fixedly connected to each other on both sides; A longitudinal guide rail (3) is slidably connected between the two transverse slide rails (2); A laser cutting machine (4) is slidably connected to the top of the longitudinal guide rail (3), and both the longitudinal guide rail (3) and the laser cutting machine (4) are driven by a linear module. The base (1) has a negative pressure channel (7) inside, one end of which extends to the outside of the base (1); The base (1) is provided with several positioning holes (5) at equal intervals on one side of the negative pressure channel (7); A limiting mechanism (6) is inserted into the positioning hole (5), and the limiting mechanism (6) includes a bottom block (11).

2. The laser positioning and cutting device for automotive headlight lenses according to claim 1, characterized in that: The positioning hole (5) penetrates the base (1), and a connecting channel (8) is provided in the middle of the base. The connecting channel (8) connects the positioning socket (5) and the negative pressure channel (7).

3. The laser positioning and cutting device for automotive headlight lenses according to claim 2, characterized in that: Each of the connecting channels (8) is fixedly connected to a support bucket (18) at its bottom; The bottom of the base block (11) is fixedly connected to a sealing plug (10), and the sealing plug (10) is inserted into the support bucket (18) for sealing.

4. The laser positioning and cutting device for automotive headlight lenses according to claim 2, characterized in that: Each of the connecting channels (8) is fixedly connected to a piston-type check valve (9) of model YCVS8-33GSHC-1, with its actuating rod facing the positioning socket (5).

5. The laser positioning and cutting device for automotive headlight lenses according to claim 1, characterized in that: The bottom block (11) is fixedly connected to the top of the elastic bellows (13). A sealing ring (15) that can move up and down is connected above the elastic bellows (13). A vacuum suction cup (17) is fixedly connected to the top of the sealing ring (15).

6. The laser positioning and cutting device for automotive headlight lenses according to claim 5, characterized in that: A ventilation channel (12) is provided between the middle side wall and the top of the bottom block (11). The top of the elastic corrugated pipe (13) is fixedly connected to a connecting pipe (14), and the connecting pipe (14) moves up and down as the elastic corrugated pipe (13) expands and contracts. The sealing ring (15) has a sealing ring at the bottom and a through pipe (16) fixedly connected in the middle. The top of the tube (16) passes through the vacuum suction cup (17), the bottom passes through the sealing ring (15), and is connected to the connecting tube (14).

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