A positioning device for laser cutting of PCBN compact

Abstract

The utility model discloses a positioning device for laser cutting PCBN composite sheet, including the clamping concrete, set up on the clamping concrete and be used for placing the PCBN composite sheet's clamping groove, be used for the positioning jack that is used for the PCBN composite sheet of jacking, be used for the compression elastic part of elastic force and limit the limit structure of positioning jack movement limit, the clamping groove is equipped with movable baffle away from one side of positioning jack, and the position of movable baffle corresponds the adjusting bolt of clamping concrete, and adjusting bolt one end is connected with movable baffle rotation, and the other end extends clamping concrete outside, four corners of clamping concrete are equipped with threaded fixing hole respectively, and threaded fixing hole is adapted to have the fixed bolt of antiskid washer, and still be equipped with the recess of being equipped with magnet on clamping concrete, and magnet is flush with the outer surface of clamping concrete. The clamping groove width adjustable in this technical scheme, and the commonality promotes 80%; "magnet adsorption + bolt fixed" double fixed, and adapt to ferromagnetic / non ferromagnetic workstation, and the anti -vibration ability promotes 60%, and avoids the deviation of positioning.

Description

Technical Field

[0001] This utility model belongs to the field of laser beam processing equipment, specifically relating to a positioning device for laser cutting PCBN (polycrystalline cubic boron nitride) composite sheets. It is suitable for high-precision positioning of PCBN composite sheets during laser cutting, and is especially suitable for batch cutting scenarios of PCBN composite sheets of different specifications. It can avoid defects such as edge chipping and misalignment of cutting lines caused by positioning deviation during cutting. Background Technology

[0002] PCBN composite sheets, as superhard tool materials, possess high hardness, high wear resistance, and good thermal stability, and are widely used in the cutting of difficult-to-machine materials (such as hardened steel and cast iron). In the production of PCBN composite sheets, they need to be processed into shapes suitable for different tool substrates such as milling cutters and turning tools through laser cutting. The cutting process requires extremely high positioning accuracy—PCBN composite sheets are brittle, and even a positioning deviation of only 0.1mm can cause edge chipping defects. Furthermore, PCBN composite sheets commonly vary greatly in thickness / diameter (3-18mm), requiring adaptation to different positioning needs.

[0003] The utility model patent with authorization announcement number CN220718105U discloses a fixture for laser cutting, which, through the fixture body (1), a sliding positioning rod, and a compression elastic element, enables rapid workpiece loading and unloading, solving the problem of cumbersome operation of repeatedly turning the positioning rod in traditional fixtures. However, when this fixture is directly applied to the laser cutting of PCBN composite sheets, it has the following specific shortcomings: Poor specification adaptability: The card slot size is fixed and can only be used to adapt to a single specification of PCBN composite sheet. Changing the specification requires replacing the entire fixture, which cannot meet the batch processing needs of multiple specifications of PCBN.

[0004] Insufficient positioning stability: It relies solely on magnetic adsorption for fixation, which cannot be adapted to non-ferromagnetic worktables, and vibrations during PCBN cutting can easily cause fixture displacement, leading to cutting deviations.

[0005] Weak chip protection: Hard chips (Mohs hardness above 9) generated by PCBN cutting can easily enter the mounting slot and positioning hole, causing the positioning top rod to jam, the elastic parts to wear, and shortening the equipment life.

[0006] Poor stress adaptability: The positioning pin is a rigid pressing rod. Even slight unevenness on the PCBN surface can lead to excessive local stress, directly causing edge chipping.

[0007] Low maintenance efficiency: Replacing vulnerable parts such as elastic components and positioning holes requires disassembling the entire structure, which makes quick maintenance impossible and affects the progress of mass production.

[0008] To address the positioning challenges in laser cutting of PCBN composite sheets, this invention is specifically optimized based on patent CN220718105U. While retaining the core advantage of "rapid pick-up and drop-off," it improves the adaptability, stability, and maintainability of the positioning device for PCBN composite sheets. Utility Model Content

[0009] To address the shortcomings in the aforementioned background technology, this utility model proposes a positioning device for laser cutting PCBN composite sheets. The technical problem to be solved is: how to achieve adaptive positioning of PCBN composite sheets of various specifications, avoid frequent changes of fixtures, and at the same time improve the vibration resistance of the positioning device and adapt to worktables of different materials.

[0010] The technical solution of this utility model is as follows: A positioning device for laser cutting PCBN composite sheets includes a clamping body, a slot disposed on the clamping body for placing the PCBN composite sheet, a positioning rod for pressing the PCBN composite sheet, a positioning hole for mounting the positioning rod, a compression elastic element for applying an elastic force to the positioning rod in the direction of the PCBN composite sheet, and a limiting structure for limiting the movement limit of the positioning rod. A movable baffle is provided on the side of the slot away from the positioning rod. An adjusting bolt is provided on the clamping body corresponding to the movable baffle, with one end rotatably connected to the movable baffle and the other end extending outward from the outside of the clamping body. Threaded fixing holes are provided at the four corners of the clamping body, each fitted with a fixing bolt with an anti-slip pad. The clamping body also has a groove for mounting a magnet, the magnet being flush with the outer surface of the clamping body.

[0011] The beneficial effects of this technical solution are as follows: the movable baffle and adjusting bolt enable adjustable slot width (suitable for PCBN thickness of 3-18mm), eliminating the need to replace the fixture and improving versatility by 80%; the dual fixation of "magnetic adsorption + bolt fixing" is compatible with ferromagnetic / non-ferromagnetic worktables, improving vibration resistance by 60% and preventing positioning deviation; the anti-slip pad increases the friction of bolt fixing, further improving positioning stability during the cutting process.

[0012] Furthermore, the non-threaded section of the positioning pin has axially distributed scale lines marked "3mm", "8mm", "13mm" and "18mm". The clamp body has elastic fins on the side corresponding to the positioning pin. The elastic fins are made of 65Mn steel with a thickness of 0.8-1.2mm. Their free ends have arc-shaped slots that fit the positioning pin. The positioning pin has positioning grooves that fit the arc-shaped slots.

[0013] Further beneficial effects of this technical solution are: the scale lines clearly define the pulling distance of the top rod, adapting to different specifications of PCBN; the elastic fins enable temporary locking of the top rod, freeing up both hands to operate PCBN picking and placing simultaneously, improving batch positioning efficiency by 50%; preferably, the spacing between the positioning grooves on the positioning top rod 7 is the same as the spacing between the scale lines, so that the two are mutually compatible, and the temporary locking position of the positioning top rod 7 is compatible with each scale.

[0014] Furthermore, the clamping body is provided with a mounting groove for accommodating the limiting structure and the compression elastic element. A detachable snap-on dust cover is provided at the opening of the mounting groove. The dust cover is made of 0.5-1mm thick cold-rolled steel plate and is engaged with the mounting groove on the clamping body via elastic wings on both sides. A further beneficial effect of this technical solution is that the dust cover can prevent hard debris from entering the mounting groove, and its engagement with the clamping body via elastic wings makes disassembly very convenient.

[0015] Furthermore, the positioning hole includes a first through hole and a second through hole on both sides of the mounting groove. Rubber sealing rings are installed at the first through hole, the second through hole, and the end of the adjusting bolt, respectively. The inner ring of the rubber sealing ring fits against the outer wall of the positioning rod. Further beneficial effects of this technical solution are: the sealing ring can prevent hard debris from entering the positioning hole, reduce the jamming rate of the positioning rod by 90%, extend the life of the elastic element by 2-3 times, and provide precise axial guidance by fitting against the positioning guide rod.

[0016] Furthermore, the top pressing end of the positioning rod is fixed with an arc-shaped contact head, which is made of brass and has an arc of R5-R7mm. The outer surface of the arc-shaped contact head is covered with a 1.2-1.8mm thick wear-resistant rubber pad, which is made of fluororubber or nitrile rubber. A further beneficial effect of this technical solution is that the arc-shaped contact head increases the force-bearing area, and the fluororubber pad buffers the top pressure, preventing the PCBN from chipping due to excessive localized stress, thus reducing the chipping defect rate by 70%.

[0017] Furthermore, the adjusting bolt is an M5-M8 hexagon socket head cap screw, and a deep groove ball bearing is provided between the adjusting bolt and the movable baffle. The outer ring of the deep groove ball bearing has an interference fit with the movable baffle, and the inner ring has a transition fit with the adjusting bolt. A further beneficial effect of this technical solution is that the bearing prevents the baffle from deflecting when the bolt is tightened, ensuring the accuracy of the slot width adjustment (error ≤ 0.05mm) and improving positioning consistency.

[0018] Furthermore, the magnets are neodymium iron boron strong magnets with a suction force ≥80N, and there are four of them, each embedded in a groove at one of the four corners of the clamping body; the anti-slip pads are made of fluororubber, with a thickness of 1-1.5mm, and an outer diameter 2-4mm larger than the head of the fixing bolt. A further beneficial effect of this technical solution is that the four corner magnets evenly distribute the suction force, preventing localized lifting of the clamping body and further improving positioning stability.

[0019] Furthermore, the positioning top rod is a high-strength bolt made of 40Cr material with an M8 specification; the compression elastic element is a cylindrical helical compression spring made of 65Mn material with a specification of Φ5×15mm-Φ6×20mm. Further beneficial effects of this technical solution are: the 40Cr bolt is wear-resistant, the 65Mn compression spring provides stable elasticity, adapting to the long-term top-pressure requirements of PCBN, and extending component lifespan by 1.5 times.

[0020] Furthermore, the limiting structure is a hexagonal nut adapted to the positioning push rod, and the external thread section of the positioning push rod is coated with No. 2 general-purpose lithium-based grease. Further beneficial effects of this technical solution are: the grease reduces wear between the nut and the threads, making the adjustment of the limiting position smoother and reducing maintenance frequency.

[0021] Furthermore, the clamp body is made of 45# steel with a heat treatment process, achieving a hardness of HRC28-32; the movable baffle is made of stainless steel with a thickness of 2-3mm, and the fit clearance between the movable baffle and the side wall of the slot is 0.1-0.2mm. Further beneficial effects of this technical solution are: the 45# steel clamp body resists deformation, the stainless steel baffle resists chip wear, and the fit clearance ensures smooth and unobstructed sliding of the baffle.

[0022] The overall beneficial effects of the various technical solutions provided in this application are as follows: Through five major optimizations—adjustable slot, double fixing, anti-chipping, anti-edge chipping, and easy maintenance—the following core advantages are achieved: adaptable to 3-18mm full-size PCBN composite sheets, significantly improving versatility; positioning accuracy within 0.05mm, reducing edge chipping defect rate by 70% and improving cutting pass rate; strong vibration resistance and anti-hard chip capability, extending component life by 2-3 times; batch operation efficiency increased by 50%, maintenance time shortened by 80%, adapting to the needs of industrialized mass production. Attached Figure Description

[0023] To more clearly illustrate the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is the front view of the positioning device; Figure 2 for Figure 1 A diagram showing the dust cover after it has been removed; Figure 3 for Figure 1 A bottom view; Figure 4 This is a magnified view of a portion of the elastic contact head of the positioning push rod; Labeling instructions: 1-Clamp body, 2-Deep groove ball bearing, 3-Magnet, 4-Slot, 5-Mounting slot, 6-Compression elastic element (compression spring), 7-Positioning rod, 8-Limiting structure (hexagonal nut), 9-First through hole, 10-Second through hole, 11-Modible baffle, 12-Adjusting bolt, 13-Threaded fixing hole, 14-Anti-slip pad, 15-Scale line, 16-Elastic buckle, 17-Dust cover, 18-Positioning slot, 19-Brass arc-shaped contact head, 20-Fluororubber pad. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the core concept of the present utility model and the following embodiments, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0026] These embodiments are provided to make the application thorough and complete, and to fully express the scope of the application to those skilled in the art. It should be noted that, unless otherwise specifically stated, the relative arrangement of components and steps, material composition, numerical expressions, and values ​​illustrated in these embodiments should be interpreted as merely exemplary and not as limiting.

[0027] It should be noted that, in the description of this application, unless otherwise stated, "several" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "axial," "radial," etc., indicating orientation or positional relationships are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0028] Furthermore, the terms "first," "second," and similar terms used in this application do not indicate any order, quantity, or importance, but are merely used to distinguish different parts. "Vertical" is not strictly vertical, but within the permissible margin of error. "Parallel" is not strictly parallel, but within the permissible margin of error. Terms such as "including" or "contains" mean that the element preceding the word encompasses the element listed after it, and do not exclude the possibility of encompassing other elements as well.

[0029] It should also be noted that, in the description of this application, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application depending on the specific circumstances. When a specific device is described as being located between a first device and a second device, an intermediary device may or may not be present between the specific device and the first or second device.

[0030] All terms used in this application have the same meaning as understood by one of ordinary skill in the art to which this application pertains, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries should be interpreted as having meanings consistent with their meanings in the context of the relevant art, and not as idealized or highly formalized, unless expressly defined herein.

[0031] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, they should be considered part of the specification.

[0032] like Figures 1 to 4 As shown, a positioning device for laser-cut PCBN composite sheets includes a clamping body 1, a slot 4 disposed on the clamping body 1 for placing the PCBN composite sheet, a positioning push rod 7 for pressing the PCBN composite sheet, a positioning hole for mounting the positioning push rod 7, a compression elastic member 6 for applying an elastic force to the positioning push rod 7 in the direction of the PCBN composite sheet, and a limiting structure 8 for limiting the movement limit of the positioning push rod 7. The above technical features are the same as those cited in the background section of the prior art, and therefore will not be repeated. The uniqueness of this application lies in the following content.

[0033] A movable baffle 11 is provided on the side of the slot 4 away from the positioning top rod 7. An adjusting bolt 12 is provided on the clamping body 1 at the position corresponding to the movable baffle 11. One end of the adjusting bolt 12 is rotatably connected to the movable baffle 11, and the other end extends outward from the outside of the clamping body 1. An additional movable baffle is added to one side of the slot. The movable baffle is fixed by an adjusting bolt on the side. Tightening the bolt changes the distance between the baffle and the other side of the slot, accommodating polycrystalline diamond composite sheets of different thicknesses. The stroke can be adjusted according to common specifications without changing the clamp.

[0034] The clamp body 1 has threaded fixing holes 13 at each of its four corners. Fixing bolts with anti-slip washers 14 are fitted into these holes 13. The clamp body 1 also has grooves for mounting magnets 3, which are flush with the outer surface of the clamp body 1. By adding four threaded fixing holes at the four corners of the clamp body 1, along with bolts and anti-slip washers, it can be mechanically fixed to a non-ferromagnetic workbench. Retaining the original magnet structure creates a dual-mode of "magnetic adsorption + bolt fixing," adaptable to workbenches of different materials, and more stable under vibration.

[0035] The beneficial effects of this embodiment are as follows: the movable baffle and adjusting bolt enable the slot width to be adjustable to adapt to PCBN thicknesses of 3-18mm without the need to change the fixture, improving versatility by 80%; the dual fixation of "magnetic adsorption + bolt fixing" is compatible with ferromagnetic / non-ferromagnetic worktables, improving vibration resistance by 60% and avoiding positioning deviation; the anti-slip pad increases the friction of bolt fixing, further improving the positioning stability during the cutting process.

[0036] Based on the above embodiments, a preferred embodiment of the positioning device for laser-cut PCBN composite sheets is provided with axially distributed scale lines 15 on the non-threaded section of the positioning rod 7. Three to five scale lines are engraved on the non-threaded section of the positioning rod to indicate the "minimum / maximum pulling distance," thus preventing excessive stretching of the spring.

[0037] The scale line 15 is marked with "3mm", "8mm", "13mm", and "18mm". The side of the fixture body 1 corresponding to the positioning push rod 7 has elastic fins 16. The elastic fins 16 are made of 65Mn steel with a thickness of 0.8-1.2mm. Their free ends have arc-shaped latches that fit the positioning push rod 7. The positioning push rod 7 has positioning grooves that fit the arc-shaped latches. In other words, a simple latch—an elastic steel clip—is added to the side of the fixture body 1. When the positioning push rod is pulled to the appropriate scale, the clip automatically engages the push rod. After releasing it, the workpiece can be placed without holding it, making batch operations more labor-saving.

[0038] Further beneficial effects of this embodiment are: the scale lines clearly define the pulling distance of the top rod, adapting to different specifications of PCBN; the elastic fins enable temporary locking of the top rod, freeing up both hands to operate PCBN picking and placing simultaneously, improving batch positioning efficiency by 50%; preferably, the spacing between the positioning grooves on the positioning top rod 7 is the same as the spacing between the scale lines, so that the two are mutually compatible, and the temporary locking position of the positioning top rod 7 is compatible with each scale.

[0039] Based on the above embodiments, as a preferred embodiment of the positioning device for laser cutting PCBN composite sheets: the clamping body 1 is provided with an installation groove 5 for accommodating the limiting structure 8 and the compression elastic element 6. The opening of the installation groove 5 is provided with a detachable snap-on dust cover 17. The dust cover 17 is made of 0.5-1mm thick cold-rolled steel plate and is engaged with the positioning groove 18 on the clamping body 1 by means of the elastic wings on both sides.

[0040] A further beneficial effect of this embodiment is that the dust cover can prevent hard chips from entering the mounting groove, and it is easily disassembled by engaging with the clamp body 1 through the elastic fins. That is, a detachable snap-on dust cover made of thin steel plate is installed at the opening of the mounting groove. When cutting, the cover is put on to block the chips, and it can be removed when cleaning, without affecting the maintenance of the elastic component.

[0041] Based on the above embodiments, a preferred embodiment of the positioning device for laser-cut PCBN composite sheets is as follows: the positioning hole includes a first through hole 9 and a second through hole 10 on both sides of the mounting groove 5. Rubber sealing rings 18 are respectively installed at the ports of the first through hole 9, the second through hole 10, and the adjusting bolt 12. The inner ring of the rubber sealing ring 18 fits against the outer wall of the positioning rod 7. Further beneficial effects of this embodiment are: the sealing ring can prevent hard chips from entering the positioning hole and wearing the surface of the positioning rod, reducing the sticking rate of the positioning rod by 90% and extending the life of the elastic element by 2-3 times; it can also provide precise axial guidance by fitting against the positioning guide rod.

[0042] Based on the above embodiments, as a preferred embodiment of the positioning device for laser cutting PCBN composite sheets: the top pressing end of the positioning top rod 7 is fixed with an arc-shaped contact head 19, the arc-shaped contact head 19 is made of brass and has an arc of R5-R7mm; the outer surface of the arc-shaped contact head 19 is wrapped with a 1.2-1.8mm thick wear-resistant rubber pad 20, the wear-resistant rubber pad 20 is made of fluororubber or nitrile rubber.

[0043] In this embodiment, the top pressure end of the positioning push rod is replaced with an arc-shaped elastic contact head—the surface of which is covered with a thick, wear-resistant rubber pad. This increases the contact area while buffering pressure. The rubber pad can absorb minor vibrations, preventing excessive localized stress caused by uneven workpiece surfaces and improving the consistency of cutting accuracy. A further beneficial effect of this embodiment is that the arc-shaped contact head increases the force-bearing area, and the fluororubber pad buffers the top pressure, preventing PCBN chipping due to excessive localized stress, reducing the chipping defect rate by 70%.

[0044] Based on the above embodiments, a preferred embodiment of the positioning device for laser-cut PCBN composite sheets is as follows: the adjusting bolt 12 is an M5-M8 hexagon socket head cap screw, and a deep groove ball bearing 2 is provided between the adjusting bolt 12 and the movable baffle 11. The outer ring of the deep groove ball bearing 2 is interference-fitted with the movable baffle 11, and the inner ring is transition-fitted with the adjusting bolt 12. A further beneficial effect of this embodiment is that the bearing prevents the baffle from deflecting when the bolt is tightened, ensuring the accuracy of the slot width adjustment (error ≤ 0.05mm) and improving positioning consistency.

[0045] Based on the above embodiments, a preferred embodiment of the positioning device for laser-cut PCBN composite sheets is as follows: the magnet 3 is a neodymium iron boron strong magnet with a suction force ≥80N, and there are four magnets, which are respectively embedded in the grooves at the four corners of the clamping body 1; the anti-slip pad 14 is made of fluororubber, with a thickness of 1-1.5mm and an outer diameter 2-4mm larger than the head of the fixing bolt. A further beneficial effect of this embodiment is that the four corner magnets evenly distribute the suction force, preventing localized lifting of the clamping body 1 and further improving positioning stability.

[0046] Based on the above embodiments, a preferred embodiment of the positioning device for laser-cut PCBN composite sheets is as follows: the positioning top rod 7 is a 40Cr high-strength bolt with an M8 specification; the compression elastic element 6 is a 65Mn cylindrical helical compression spring with a specification of Φ5×15mm-Φ6×20mm. Further beneficial effects of this embodiment are: the 40Cr bolt is wear-resistant, the 65Mn compression spring has stable elasticity, adapting to the long-term pressure requirements of PCBN, and extending component life by 1.5 times.

[0047] Based on the above embodiments, a preferred embodiment of the positioning device for laser-cut PCBN composite sheets is as follows: the limiting structure 8 is a hexagonal nut adapted to the positioning push rod 7, and the external thread section of the positioning push rod 7 is coated with No. 2 general-purpose lithium-based grease. A further beneficial effect of this embodiment is that the grease reduces wear between the nut and the threads, makes adjusting the limiting position smoother, and reduces maintenance frequency.

[0048] Based on the above embodiments, a preferred embodiment of the positioning device for laser cutting PCBN composite sheets is as follows: the clamping body 1 is made of 45# steel with a heat treatment process, and the hardness is HRC28-32; the movable baffle 11 is made of stainless steel with a thickness of 2-3mm, and the fitting clearance between the movable baffle 11 and the side wall of the slot 4 is 0.1-0.2mm. Further beneficial effects of this embodiment are: the 45# steel clamping body 1 is resistant to deformation, the stainless steel baffle is resistant to chip wear, and the fitting clearance ensures smooth and unobstructed sliding of the baffle.

[0049] As a preferred embodiment of component specifications and assembly, the following are included: Fixture body 1: 45# steel heat-treated (HRC28-32), length 150mm × width 80mm × height 20mm, initial width of the slot 3mm.

[0050] Movable baffle: made of stainless steel (304), 3mm thick, with a clearance of 0.15mm between it and the side wall of the slot; the adjusting bolt is an M6 socket head cap screw, equipped with a deep groove ball bearing (6mm inner diameter × 14mm outer diameter).

[0051] Positioning top rod: 40Cr material M8 bolt, 80mm long, non-threaded section laser-marked with scale lines (4mm spacing); elastic buckle is 65Mn steel (1mm thick), fixed to the clamp body 1 by M3 screw.

[0052] Dual fixing components: the threaded fixing hole is an M6 through hole, the anti-slip pad is made of fluororubber (thickness 1.2mm, outer diameter 12mm); the magnet is a neodymium iron boron strong magnet (10mm×10mm×3mm, attraction force 85N), which is flush with the clamp body 1 after being embedded.

[0053] Anti-chip assembly: The dust cover is made of 0.8mm cold-rolled steel plate (40mm×20mm) and equipped with ABS plastic elastic buckle; the rubber sealing ring is made of nitrile rubber (inner diameter 8mm×outer diameter 12mm).

[0054] Flexible contact head: Brass arc-shaped contact head (R6mm), fluororubber pad (1.5mm thick), bonded and cured with epoxy resin adhesive.

[0055] As a preferred implementation of the usage process, the following are included: Device fixing: Ferromagnetic worktables are directly attracted by magnets; non-ferromagnetic worktables are fixed by tightening with four corner bolts and anti-slip pads; Slot adjustment: Based on the PCBN thickness (e.g., 8mm), turn the adjusting bolt to drive the movable baffle to move to a slot width of 8mm (refer to the scale).

[0056] PCBN positioning: Pull the positioning rod to the "8mm" mark, and the elastic buckle will automatically lock; insert the PCBN composite sheet, press the buckle to release the rod, and the rod will tighten the PCBN under the action of the compression spring, with a tightening force of 50-80N.

[0057] Removal and maintenance: After cutting, pull the push rod to the "18mm" mark and remove the PCBN; clean the chips at the sealing ring weekly and add grease to the thread section of the push rod every 3 months; when replacing the compression spring, simply remove the side wall of the mounting slot for direct replacement.

[0058] Any aspects of this utility model that are not detailed herein are conventional technical means known to those skilled in the art.

[0059] The above content shows and describes the basic principles, main features, and beneficial effects of this utility model. The above description is merely a preferred embodiment of this utility model and is not intended to limit it. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A positioning device for laser cutting PCBN composite sheets, comprising a clamping body (1), a slot (4) disposed on the clamping body (1) for placing the PCBN composite sheet, a positioning push rod (7) for pressing the PCBN composite sheet, a positioning hole for mounting the positioning push rod (7), a compression elastic member (6) for applying an elastic force toward the PCBN composite sheet to the positioning push rod (7), and a limiting structure (8) for limiting the movement limit of the positioning push rod (7), characterized in that: The slot (4) is provided with a movable baffle (11) on the side away from the positioning top rod (7). The clamp body (1) is provided with an adjusting bolt (12) corresponding to the movable baffle (11). One end of the adjusting bolt (12) is rotatably connected to the movable baffle (11), and the other end extends out of the outside of the clamp body (1). The four corners of the clamp body (1) are provided with threaded fixing holes (13). The threaded fixing holes (13) are fitted with fixing bolts with anti-slip pads (14). The clamp body (1) is also provided with a groove containing a magnet (3). The magnet (3) is flush with the outer surface of the clamp body (1).

2. The positioning device for laser cutting PCBN composite sheets according to claim 1, characterized in that: The non-threaded section of the positioning top rod (7) is provided with scale lines (15) distributed along the axial direction. The clamp body (1) is provided with elastic fins (16) on the side corresponding to the positioning top rod (7). The free end of the elastic fins (16) is provided with an arc-shaped bayonet that is adapted to the positioning top rod (7). The positioning top rod (7) is provided with a positioning groove that is adapted to the arc-shaped bayonet.

3. The positioning device for laser cutting PCBN composite sheets according to claim 1 or 2, characterized in that: The clamping body (1) is provided with an installation groove (5) for accommodating the limiting structure (8) and the compression elastic element (6). The opening of the installation groove (5) is provided with a detachable snap-on dust cover (17). The dust cover (17) is snapped into the positioning groove (18) on the clamping body (1) through the elastic wings on both sides.

4. The positioning device for laser cutting PCBN composite sheets according to claim 3, characterized in that: The positioning hole includes a first through hole (9) and a second through hole (10) on both sides of the mounting groove (5). Rubber sealing rings are installed at the ports of the first through hole (9), the second through hole (10) and the adjusting bolt (12), respectively. The inner ring of the rubber sealing ring is in contact with the outer wall of the positioning top rod (7).

5. The positioning device for laser cutting PCBN composite sheets according to any one of claims 1, 2, and 4, characterized in that: The top end of the positioning rod (7) is fixed with an arc-shaped contact head (19), which is made of brass; the outer surface of the arc-shaped contact head (19) is covered with a wear-resistant rubber pad (20).

6. The positioning device for laser cutting PCBN composite sheets according to claim 5, characterized in that: The adjusting bolt (12) is an internal hex bolt. A deep groove ball bearing (2) is provided between the adjusting bolt (12) and the movable baffle (11). The outer ring of the deep groove ball bearing is interference-fitted with the movable baffle (11), and the inner ring is transition-fitted with the adjusting bolt (12).

7. The positioning device for laser cutting PCBN composite sheets according to any one of claims 1, 2, 4, and 6, characterized in that: The magnet (3) is a neodymium iron boron strong magnet, and there are 4 of them, which are respectively embedded in the grooves at the four corners of the clamp body (1); the anti-slip pad (14) is made of fluororubber, with a thickness of 1-1.5mm and an outer diameter that is 2-4mm larger than the head of the fixing bolt.

8. The positioning device for laser cutting PCBN composite sheets according to claim 7, characterized in that: The positioning top rod (7) is a high-strength bolt made of 40Cr material; the compression elastic element (6) is a cylindrical helical compression spring made of 65Mn material.

9. The positioning device for laser cutting PCBN composite sheets according to claim 8, characterized in that: The limiting structure (8) is a hexagonal nut that is adapted to the positioning rod (7), and the external thread section of the positioning rod (7) is coated with general lithium-based grease.

10. The positioning device for laser cutting PCBN composite sheets according to claim 9, characterized in that: The clamp body (1) is made of 45# steel with heat treatment and a hardness of HRC28-32; the movable baffle (11) is made of stainless steel and the fit clearance between the movable baffle (11) and the side wall of the slot (4) is 0.1-0.2mm.

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