PVD coating preparation device for cemented carbide cutting tool

Abstract

The present invention relates to the technical field of metal material coating, and in particular to a PVD coating preparation device for a cemented carbide cutting tool. The present invention comprises a frame and a chamber housing. A through channel horizontally passes through the middle of the bottom of the chamber housing, and a driving switching mechanism is mounted at the top of the frame corresponding to the through channel; the driving switching mechanism comprises a first screw rod rotatably mounted at the top of the frame and a support seat located at the top of the first screw rod; a sliding bar threadedly sleeved on the outer side of the first screw rod is fixedly arranged at the middle of the bottom of the support seat; T-shaped partition plates are fixedly arranged at the middle and both ends of the top end surface of the support seat, and slots are formed on both sides of the bottom end of each T-shaped partition plate; a workpiece carrying mechanism is arranged between every two adjacent T-shaped partition plates; and a sputtering coating mechanism is arranged inside the chamber housing, and a linkage mechanism configured to control the workpiece carrying mechanism and the sputtering coating mechanism to perform a linkage action is arranged on the chamber housing. The present invention allows for the synchronization of material replacement and repeated layer-by-layer sputtering coating, improving the efficiency of sputtering coating and the quality of film forming.

Description

A PVD coating preparation device for cemented carbide cutting tools Technical Field

[0001] This invention relates to the field of metal material coating technology, specifically a PVD coating preparation device for cemented carbide cutting tools. Background Technology

[0002] In the machinery manufacturing industry, cemented carbide cutting tools are widely used as tool materials due to their excellent properties such as high hardness, wear resistance, good strength and toughness, heat resistance, and corrosion resistance. Examples include turning tools, milling cutters, planing tools, drills, and boring tools. However, under the load of their specific working environments, the machined parts of the tools are prone to surface failure, leading to tool damage. Therefore, improving the surface properties of the machined parts is necessary. Currently, PVD (Physical Vapor Deposition) technology is often used to deposit a hard protective layer on the substrate surface to enhance the surface properties of the machined parts of the cutting tool. Technical issues

[0003] The prior art discloses a Chinese patent with publication number CN 219689817 U (IPC classification number C23C4 / 06): a plasma alloy powder cladding equipment, and discloses a negative pressure suction nozzle. The negative pressure suction nozzle controls the cladding equipment to move up and down to adapt to the powder adsorption of workpieces of different heights and reduce the range of powder splashing.

[0004] However, the existing technology still has certain defects. During use, the powder layer thickness adsorbed in the center of the adsorption force on the workpiece surface is significantly higher than that adsorbed in the edge of the adsorption force, resulting in uneven powder thickness on the workpiece surface, which affects the cladding quality and the subsequent performance of the workpiece. Technical solutions

[0005] The purpose of this invention is to provide a PVD coating preparation device for cemented carbide cutting tools to solve the problems mentioned in the background art.

[0006] The objective of this invention can be achieved through the following technical solutions:

[0007] A PVD coating preparation device for cemented carbide cutting tools includes a frame and a cavity. The top of the cavity is provided with a gas supply component and a vacuum component. A through-channel is horizontally provided in the middle of the bottom of the cavity. A drive switching mechanism for switching workstations is installed on the top of the frame at the position corresponding to the through-channel.

[0008] The drive shifting mechanism includes a screw rod rotatably mounted on the top of the frame and a support located on the top of the screw rod. A slide bar threaded onto the outside of the screw rod is fixedly provided in the middle of the bottom of the support. T-shaped partitions are fixedly provided in the middle and at both ends of the top surface of the support. Each T-shaped partition has a through groove on both sides of its bottom end.

[0009] Between each pair of adjacent T-shaped partitions, there is a workpiece carrying mechanism for mounting the cutting tool to be processed. Inside the cavity, there is a sputtering coating mechanism for coating the processing part of the cutting tool to be processed. On the cavity, there is a linkage mechanism for controlling the linkage action between the workpiece carrying mechanism and the sputtering coating mechanism.

[0010] In a preferred embodiment, the workpiece carrying mechanism includes a support plate fixed between two adjacent T-shaped partitions. The top of the support plate has multiple annular grooves evenly distributed in a ring. The top of the support plate is rotatably mounted with multiple cylinders concentrically arranged with the annular grooves through bearings. A gear is fixedly sleeved on the outer side of one end of each cylinder extending to the bottom of the support plate. A slot is opened at the top of each cylinder.

[0011] Each of the aforementioned annular grooves is movably equipped with a clamping assembly for holding and fixing the tool to be processed, and a steering assembly for driving the tool to be processed to rotate is movably installed at the bottom of the pallet.

[0012] In a preferred embodiment, the clamping assembly includes a first ring plate rotatably mounted inside the annular sink via bearings and a second ring plate suspended above the first ring plate. A U-shaped frame is fixedly provided on the top of the first ring plate, and the bottom ends of both ends of the U-shaped frame movably pass through the second ring plate. A spring telescopic rod is fixedly installed between the second ring plate and the first ring plate, and an elastic clamping member is installed on the inner side of the U-shaped frame.

[0013] In a preferred embodiment, the elastic clamping member includes two extrusion plates fixed to the top of the second ring plate and two clamping blocks located inside the U-shaped frame. Slide grooves are provided on both sides of the U-shaped frame, and a straight rod is fixedly provided inside each slide groove. A slider is fixedly connected to both sides of the clamping block and slidably installed inside the corresponding slide groove. The slider is slidably sleeved on the outside of the straight rod. A spring is movably sleeved on the outside of both ends of the straight rod and fixedly connected to the slider and the inner wall of the groove.

[0014] In a preferred embodiment, the steering assembly includes a cylindrical tube rotatably mounted on the bottom of the support plate via a bearing, a gear two meshing with a gear one fixedly sleeved on the outside of the cylindrical tube, a rod movably inserted inside the cylindrical tube, and a circular plate fixedly connected to one end of the rod extending to the outside of the cylindrical tube, with an annular groove formed on the outside of the circular plate.

[0015] The inner side of the column has two spiral grooves that are centrally symmetrical about the column rod. The outer side of the end of the column rod that extends into the column tube is fixed with a protruding post corresponding to the position of the two spiral grooves. The two protruding posts are slidably connected to the inside of the corresponding spiral grooves.

[0016] In a preferred embodiment, the linkage mechanism includes through slots and cross slots on both sides of the cavity shell. Ear plates are movably inserted through the inner sides of both through slots, and a ring support is fixedly connected between the two ear plates. Cross lifting plates are movably inserted through the inner sides of both cross slots. Horizontal plates are fixedly installed on both sides of the cavity shell at positions corresponding to the cross lifting plates. A cylinder is fixedly installed at the bottom of the horizontal plate, and the telescopic end of the cylinder is fixedly connected to the corresponding cross lifting plate.

[0017] The linkage mechanism also includes brackets fixed on both sides of the outer shell. Gear three is rotatably mounted on both brackets. Straight racks are fixedly connected to one end of the two ear plates extending to the outside of the shell. L-shaped racks are fixedly connected to one end of the two cross lifting plates extending to the outside of the shell. Both the straight racks and the L-shaped racks mesh with gear three at their respective positions.

[0018] In a preferred embodiment, the sputtering coating mechanism includes a disc suspended above a ring support, and a plurality of L-shaped cylinders evenly distributed in a ring are fixedly connected between the disc and the ring support. Each L-shaped cylinder is movably fitted with a mounting frame on its outer side, and a sputtering head can be detachably installed at the bottom end of each mounting frame. Each mounting frame is also provided with a protective component on its outer side.

[0019] A servo motor is fixedly installed on the top of the disk. A screw rod is fixedly connected to the end of the output shaft of the servo motor. A ring block is threaded onto the outer side of the screw rod. A swing arm is hinged between the top of each mounting bracket and the ring block.

[0020] In a preferred embodiment, the protective component includes connecting arms fixed on both sides of the mounting bracket, a frame plate fixedly connected between the two connecting arms, a frame sleeve movably fitted inside the frame plate, and a round hole vertically penetrating the top of the frame sleeve.

[0021] Both sides of the frame are fixedly provided with side plates, and the outer sides of the two connecting arms are fixedly provided with round rods that can move through the side plates at their respective positions. The outer sides of the round rods are movably fitted with springs that fix and connect the corresponding connecting arms to the side plates.

[0022] In a preferred embodiment, the workpiece carrying mechanism further includes an auxiliary control component disposed on the top of the pallet. The auxiliary control component includes a ring tube and a T-shaped column fixed on the top of the pallet in a concentric arrangement, with the T-shaped column disposed inside the ring tube and a stop member provided between the T-shaped column and the ring tube.

[0023] The auxiliary control component also includes a lifting plate located above the pallet. An arc-shaped card slot is provided on the outer side of the lifting plate corresponding to the position of each ring plate II. Each ring plate II is movably connected to the inside of the corresponding arc-shaped card slot.

[0024] In a preferred embodiment, the stop member includes a push ring movably sleeved on the outside of the T-shaped column and a T-shaped block movably penetrating the side of the ring tube. A spring is fixedly connected between one end of the T-shaped block located inside the ring tube and the inner wall of the ring tube. A trapezoidal groove is vertically penetrating the top of the end of the T-shaped block located inside the ring tube. A pressure strip is fixedly provided at the bottom of the push ring corresponding to the position of the trapezoidal groove, and the bottom end of the pressure strip extends into the inside of the trapezoidal groove. Beneficial effects

[0025] The beneficial effects of this invention are:

[0026] 1. This invention utilizes a cylinder to drive a cross-shaped lifting plate, causing a circular plate to reciprocate and rise. During this process, a protruding column sliding along the corresponding spiral groove on the outer side of the column rod drives the cylinder to rotate. The meshing between gear one and gear two drives the tool to rotate. Simultaneously, the L-shaped rack that reciprocates and rises with the cross-shaped lifting plate drives gear three at its location to rotate alternately in the forward and reverse directions, thereby driving the corresponding straight rack to reciprocate and rise. This, in turn, drives the ring support to reciprocate and rise, allowing the sputtering coating mechanism that reciprocates and rises with the ring support to coat the coating area on the rotating tool surface with a corresponding non-ferrous metal coating, such as titanium nitride coating or titanium carbide coating.

[0027] 2. This invention utilizes a drive-and-change mechanism to drive two sets of workpiece carrying mechanisms to alternately move between the material changing station and the sputtering coating station, thereby enabling material changing and sputtering coating to be carried out simultaneously and improving the efficiency of sputtering coating.

[0028] 3. By setting the mounting frame as an adjustable structure, the relative position between the sputtering head on the mounting frame and the target tool can be adjusted according to the actual coating requirements, thereby improving the applicability of the equipment. At the same time, the protective components set on the mounting frame can delineate the coating area and prevent the sputtered target material from depositing on the inner wall of the cavity shell and in the already formed or unformed areas outside the area where film is being deposited.

[0029] 4. By setting up auxiliary control components, the present invention can simultaneously control the status of tools at multiple clamping stations, facilitating quick tool changes. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0032] Figure 2 is a partial structural schematic diagram of the present invention;

[0033] Figure 3 is a schematic diagram of the cavity shell structure of the present invention;

[0034] Figure 4 is a schematic diagram of the drive-transfer mechanism of the present invention;

[0035] Figure 5 is a schematic diagram of the workpiece bearing mechanism of the present invention from a first perspective.

[0036] Figure 6 is a schematic diagram of the workpiece bearing mechanism of the present invention from a second perspective.

[0037] Figure 7 is an exploded view of the workpiece bearing mechanism of the present invention;

[0038] Figure 8 is a schematic diagram of the clamping component structure of the present invention;

[0039] Figure 9 is a partial structural diagram of the auxiliary control component of the present invention;

[0040] Figure 10 is a schematic cross-sectional view of the steering component of the present invention;

[0041] Figure 11 illustrates the cooperation between the linkage mechanism and the sputtering coating mechanism of the present invention.

[0042] Figure 12 is a schematic diagram of the protective component structure of the present invention.

[0043] The attached figures are labeled as follows: 1. Frame; 2. Cavity; 3. Through-slot; 4. Drive and shifting mechanism; 41. Screw 1; 42. Support; 43. Slide bar; 44. T-shaped partition; 45. Through slot; 5. Workpiece bearing mechanism; 51. Support plate; 52. Annular groove; 53. Clamping assembly; 531. Annular plate 1; 532. U-shaped frame; 533. Annular plate 2; 534. Spring telescopic rod; 535. Clamping block; 536. Slider; 537. Extrusion plate; 538. Straight rod; 539. Spring 1; 54. Cylinder; 55. Gear 1; 56. Steering assembly; 561. Column tube; 562. Gear 2; 563. Column rod; 564. Spiral groove; 565. Circular plate; 566. Annular groove; 57. Auxiliary control assembly; 571. Annular tube; 572. 573. T-shaped column; 574. Push ring; 575. Pressure strip; 576. T-shaped block; 577. Trapezoidal groove; 578. Spring II; 579. Lifting plate; 60. Linkage mechanism; 61. Horizontal plate; 62. Cylinder; 63. Cross lifting plate; 64. Ring support; 65. Ear plate; 66. Straight rack; 67. L-shaped rack; 68. Gear III; 69. Through groove; 610. Cross groove; 71. Sputtering coating mechanism; 72. Disc; 73. L-shaped cylinder; 74. Ring block; 75. Screw II; 76. Protective assembly; 77. Connecting arm; 78. Frame plate; 79. Frame sleeve; 70. Round hole; 75. Side plate; 75. Round rod; 76. Spring III; 77. Mounting bracket; 78. Swing arm; 79. Sputtering head; 80. Gas supply assembly; 91. Vacuum assembly. Embodiments of the present invention

[0044] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0045] The PVD coating of this invention is a type of high corrosion-resistant and wear-resistant protective coating in the new materials industry. The PVD coating of cemented carbide cutting tools belongs to a part of high corrosion-resistant and wear-resistant protective coatings in non-ferrous metal materials. It is used to improve the surface properties of cemented carbide cutting tools. Specifically, it includes titanium nitride coating, titanium carbonitride coating, aluminum titanium nitride, or aluminum titanium nitride coating.

[0046] The PVD coating preparation equipment for cemented carbide cutting tools of the present invention is mainly used for coating the drill bits in cemented carbide cutting tools. Example 1

[0047] Referring to Figures 1-4 in the specification, a PVD coating preparation device for cemented carbide cutting tools according to an embodiment of the present invention includes a frame 1 and a cavity 2. The top of the cavity 2 is provided with a gas supply component 8 for supplying argon gas to the cavity 2 under vacuum and a vacuum component 9 for evacuating and breaking the vacuum inside the cavity 2. A through channel 3 is horizontally provided through the middle of the bottom of the cavity 2. A drive switching mechanism 4 for switching work positions is installed on the top of the frame 1 at the position corresponding to the through channel 3.

[0048] The drive shifting mechanism 4 includes a screw 41 rotatably mounted on the top of the frame 1 and driven by a drive motor, and a support 42 located on the top of the screw 41. A slide bar 43 threadedly connected to the outside of the screw 41 is fixedly provided at the bottom center of the support 42. T-shaped partitions 44 are fixedly provided at the middle of the top surface and at both ends of the support 42. The support 42 can be divided into two working areas by the three T-shaped partitions 44. The screw 41 is driven to rotate by the drive motor, so that the tools to be processed in the two working areas above the support 42 alternately enter the cavity shell 2. Each T-shaped partition 44 has through slots 45 on both sides of its bottom end. The distance between the opposite sides of two adjacent T-shaped partitions 44 is equal to the length of the through slot 3. The two adjacent T-shaped partitions 44 can be used to block the two ends of the through slot 3.

[0049] Between each pair of adjacent T-shaped partitions 44, there is a workpiece carrying mechanism 5 for mounting the cutting tool to be processed. Inside the cavity shell 2, there is a sputtering coating mechanism 7 for coating the processing part of the cutting tool to be processed. The cavity shell 2 is equipped with a linkage mechanism 6 for controlling the linkage action between the workpiece carrying mechanism 5 and the sputtering coating mechanism 7.

[0050] It should be noted that the present invention uses a drive mechanism 4 to allow two sets of cutting tools to be processed to alternately enter the cavity shell 2, evacuate the cavity shell 2 to a vacuum working state, and introduce argon gas. Then, by applying a high voltage, a gas discharge is generated to form plasma. The argon ions in this plasma are accelerated under the action of an electric field and bombard the target surface on the sputtering coating mechanism 7. The atoms on the target surface are ejected under the bombardment of argon ions, forming a sputtering phenomenon. The sputtered target atoms or molecules fly to the surface of the cutting tool and deposit there to form a thin film.

[0051] Specifically, as shown in Figures 5-8, the workpiece carrying mechanism 5 includes a support plate 51 fixed between two adjacent T-shaped partitions 44. The width of the support plate 51 is equal to the width of the through channel 3. A sealing layer is applied to the contact area between the surface of the support plate 51 and the T-shaped partition 44 and the inner side of the cavity shell 2. This helps to ensure that the vacuum working state inside the cavity shell 2 is not disrupted during the subsequent sputtering coating process. The top of the support plate 51 has multiple annular grooves 52 evenly distributed in a ring. The top of the support plate 51 is rotatably mounted with multiple cylinders 54 concentrically arranged with the annular grooves 52 through bearings. A gear 55 is fixedly sleeved on the outer side of one end of each cylinder 54 extending to the bottom of the support plate 51. The top of each cylinder 54 has a slot for holding the tool to be processed.

[0052] Each annular groove 52 is movably installed with a clamping assembly 53 for clamping and fixing the tool to be processed. The clamping assembly 53 includes an annular plate 531 rotatably installed inside the annular groove 52 via bearings and an annular plate 533 suspended above the annular plate 531. A U-shaped frame 532 is fixedly provided on the top of the annular plate 531, and the bottom ends of the U-shaped frame 532 movably pass through the annular plate 533. A spring telescopic rod 534 is fixedly installed between the annular plate 533 and the annular plate 531. The spring telescopic rod 534 includes a sleeve fixedly connected to the annular plate 531 and a sleeve rod fixedly connected to the annular plate 533. The bottom end of the sleeve rod is movably inserted into the sleeve. The spring telescopic rod 534 also includes a connecting spring fixedly connected between the annular plate 531 and the annular plate 533. The connecting spring is sleeved on the outside of the sleeve. An elastic clamping member is installed on the inside of the U-shaped frame 532.

[0053] The elastic clamping component includes two extrusion plates 537 fixed to the top of the ring plate 533 and two clamping blocks 535 located inside the U-shaped frame 532. The top ends of the two extrusion plates 537 on opposite sides and the bottom ends of the two clamping blocks 535 on opposite sides are all set as flared bevels. The U-shaped frame 532 has grooves on both sides, and a straight rod 538 is fixedly installed inside each groove. The clamping blocks 535 are fixedly connected to both sides and slidably installed inside the corresponding grooves. The sliders 536 are slidably sleeved on the corresponding straight rods. On the outer side of 538, springs 539 are movably sleeved on both ends of the straight rod 538 and fixedly connected to the slider 536 and the inner wall of the groove. The elastic coefficient of the connecting spring is greater than that of the spring 539, so that when the connecting spring is in its natural state, the vertical surfaces of the opposite sides of the two clamping blocks 535 are in contact with the vertical surfaces of the opposite sides of the two extrusion plates 537. At this time, the two clamping blocks 535 are in the state of clamping the tool to be processed (as shown in Figure 8), while the spring 539 is in the state of being stretched.

[0054] It should be noted that during the clamping and fixing of the tool to be processed, the elastic clamping component is first adjusted to the initial state, that is, the connecting spring on the spring telescopic rod 534 is in a compressed state under the action of external force. The extrusion plate 537 and the second ring plate 533 move down along the two ends of the U-shaped frame 532 together with the compressed connecting spring, so that the two clamping blocks 535 move apart under the action of the restoring force of the corresponding spring 539. During this process, the inclined surface on the clamping block 535 remains in contact with the inclined surface on the corresponding extrusion plate 537, and the top of the extrusion plate 537 is always above the U-shaped frame 532.

[0055] When clamping and fixing the tool to be processed, the mounting end of the target tool is passed through the cavity between the two opposing clamping blocks 535 and inserted into the slot at the top of the corresponding cylinder 54. Then, the external force applied to the second ring plate 533 is removed, allowing the second ring plate 533 to move upward under the restoring force of the connecting spring on the spring extension rod 534. At the same time, it drives the two extrusion plates 537 to move upward synchronously. During this process, as the extrusion plates 537 gradually move upward, they gradually push the two opposing clamping blocks 535 to move towards each other and stretch the corresponding spring 539 until the compressed connecting spring returns to its natural state. At this time, the two opposing clamping blocks 535 have completed clamping the tool mounting end inside the slot at their respective positions, while the processing part of the tool is located above the horizontal plane at the top of the extrusion plate 537.

[0056] Specifically, as shown in Figures 6-7 and 10, a steering assembly 56 for driving the tool to be processed to rotate is movably installed at the bottom of the support plate 51. The steering assembly 56 includes a cylindrical tube 561 rotatably installed at the bottom of the support plate 51 via bearings. A gear 562 that meshes with gear 55 is fixedly sleeved on the outside of the cylindrical tube 561. A rod 563 is movably inserted into the inside of the cylindrical tube 561. A circular plate 565 is fixedly connected to one end of the rod 563 that extends to the outside of the cylindrical tube 561. An annular groove 566 is provided on the outside of the circular plate 565. The annular groove 566 can be used to insert a driving component installed on the linkage mechanism 6 to push the circular plate 565 to rise and fall without having to deliberately adjust the insertion direction.

[0057] Two spiral grooves 564 are provided on the inner side of the column tube 561, which are centrally symmetrical about the column rod 563. The bottom end of the spiral grooves 564 is sealed, so that after the driving member is completely separated from the annular groove 566 on the circular plate 565, the column rod 563 will not separate from the column tube 561. The position of the circular plate 565 in this state is the initial position of the driving member. The outer side of the end of the column rod 563 that extends into the column tube 561 is fixed with a protruding post corresponding to the position of the two spiral grooves 564. The two protruding posts are slidably connected to the inside of the corresponding spiral grooves 564.

[0058] It should be noted that during the synchronous self-rotation of the cutting tools at multiple stations in the sputtering coating process, after the workpiece carrying mechanism 5 carrying the cutting tool enters the sputtering coating station inside the cavity shell 2, one end of the driving component on the linkage mechanism 6 is inserted into the annular groove 566 on the circular plate 565. The power end connected to the driving component causes the driving component to reciprocate and lift, thereby driving the top of the column rod 563 to reciprocate and lift inside the column cylinder 561. Since the protrusion moves synchronously with the column rod 563, and the protrusion slides along the spiral groove 564 on the inner side of the column cylinder 561, the column rod 563 will use the protrusion to drive the column cylinder 561 to rotate during the lifting and lowering process. This will drive the gear 2 562 on the outer side of the column cylinder 561 to rotate, and use the rotating gear 2 562 to drive the gear 1 55 on each cylinder 54 to rotate, thereby driving the annular plate 1 531 at the cutting tool insertion station to rotate, thus driving the target cutting tool to rotate.

[0059] Furthermore, an anti-slip pad can be added to one end surface of the drive component, inside the ring groove 566, to limit the circular plate 565 after the drive component is inserted, so that the circular plate 565 will not rotate relative to the drive component during the rotation of the second gear 562 and the first gear 55, thereby ensuring the smooth operation of the lifting process.

[0060] Specifically, as shown in Figures 1-2 and 11, the linkage mechanism 6 includes through slots 69 and cross slots 610 on both sides of the cavity shell 2. Ear plates 65 are movably inserted through the inner sides of both through slots 69. A ring support 64 for supporting the sputtering coating mechanism 7 is fixedly connected between the two ear plates 65. Cross lifting plates 63 are movably inserted through the inner sides of both cross slots 610. The cross lifting plates 63 are the aforementioned driving components. The distance between the opposite ends of the two cross lifting plates 63 is equal to the inner diameter of the ring slot 566. Horizontal plates 61 are fixedly installed on both sides of the inner cavity of the cavity shell 2 at positions corresponding to the cross lifting plates 63. A cylinder 62 is fixedly installed at the bottom of the horizontal plate 61. The telescopic end of the cylinder 62 is fixedly connected to the corresponding cross lifting plate 63. When the cross lifting plate 63 is in the initial state (i.e., the horizontal height of the ring slot 566 when the circular plate 565 is at the lowest point), the through slot 45 on the T-shaped partition 44 is exactly aligned with the corresponding cross lifting plate 63.

[0061] The linkage mechanism 6 also includes brackets fixed on both sides of the outer side of the cavity shell 2. Gear 68 is rotatably mounted on both brackets. Straight racks 66 are fixedly connected to one end of the two ear plates 65 extending to the outside of the cavity shell 2. L-shaped racks 67 are fixedly connected to one end of the two cross lifting plates 63 extending to the outside of the cavity shell 2. Both the straight racks 66 and the L-shaped racks 67 mesh with the gear 68 at their respective positions. This allows the cross lifting plate 63 to drive the circular plate 565 to reciprocate and lift, while the ring support 64 also drives the sputtering coating mechanism 7 carried above it to reciprocate and lift.

[0062] It should be noted that during the process of using the linkage mechanism 6 to drive the workpiece carrying mechanism 5 and the sputtering coating mechanism 7 at the sputtering coating station to perform linkage actions, the workpiece carrying mechanism 5, which carries the tool to be processed, enters the cavity shell 2. After the cavity shell 2 is evacuated to a vacuum working state, argon gas is introduced into the vacuum cavity. Then, by applying a high voltage, gas discharge is generated to form plasma. At the same time, the control cylinder 62 drives the cross lifting plate 63 to perform reciprocating lifting motion, so that the tools at multiple stations rotate synchronously. Furthermore, during the reciprocating lifting of the cross lifting plate 63, the L-shaped rack 67, which reciprocates with the cross lifting plate 63, drives the gear 68 at its position to rotate alternately in the forward and reverse directions, thereby driving the corresponding straight rack 66 to perform reciprocating lifting motion, which in turn drives the ring support 64 to perform reciprocating lifting motion. This allows the sputtering coating mechanism 7, which reciprocates with the ring support 64, to repeatedly coat the coating area on the rotating tool surface layer by layer.

[0063] Specifically, as shown in Figures 11-12, the sputtering coating mechanism 7 includes a disk 71 suspended above a ring support 64. Multiple L-shaped cylinders 72, evenly distributed in a ring, are fixedly connected between the disk 71 and the ring support 64. Each L-shaped cylinder 72 has a mounting bracket 76 movably fitted onto its outer side. A sputtering head 78 can be detachably mounted at the bottom of each mounting bracket 76. The sputtering head 78, as the core component of thin film deposition, specifically includes an RF power supply, a sputtering target, and a magnetic field generator. The sputtering target generates particles under the influence of the power supply, and the magnetic field guides these ions to bombard the target, causing the target atoms to deposit onto the surface of the machining area of ​​the cutting tool (this sputtering film deposition utilizes existing mature technology and will not be described in detail here).

[0064] A servo motor is fixedly installed on the top of the disc 71. The output shaft of the servo motor is fixedly connected to a screw 74. A ring block 73 is threaded onto the outside of the screw 74. A swing arm 77 is hinged between the top of each mounting bracket 76 and the ring block 73.

[0065] It should be noted that during the sputtering coating process of the target tool's machining surface using the sputtering coating mechanism 7, the servo motor is first controlled to drive the screw 74 to rotate according to the actual coating requirements, causing the ring block 73 to move up and down along the screw 74. The angle between the swing arm 77 and the mounting bracket 76 is adjusted by the change in the height of the ring block 73, thereby adjusting the relative position of the mounting bracket 76 on the L-shaped cylinder 72, that is, adjusting the distance between the sputtering head 78 and the target tool. Then, the sputtering head 78 is started to work, and the coating work of the tool is completed with the reciprocating rise and fall of the ring support 64.

[0066] Furthermore, a limiting component can be added at the connection between the mounting bracket 76 and the L-shaped cylinder 72 or the screw 74 and the ring block 73 (such as adding a limiting strip on the mounting bracket 76 or the ring block 73, and opening a limiting groove on the surface of the L-shaped cylinder 72 or the screw 74 to cooperate with the limiting strip, which is not specifically shown in the attached drawings), so that the screw 74 can only drive the ring block 73 to move vertically during rotation, thereby ensuring that the mounting bracket 76 will not wobble during the sliding along the L-shaped cylinder 72. Example 2

[0067] Referring to Figures 11-12 in the specification, a PVD coating preparation device for cemented carbide cutting tools according to an embodiment of the present invention is provided with a protective component 75 on the outside of each mounting bracket 76. The protective component 75 includes connecting arms 751 fixed on both sides of the mounting bracket 76, and a frame plate 752 fixedly connected between the two connecting arms 751. A frame sleeve 753 is movably sleeved inside the frame plate 752. A circular hole 754 with the same outer diameter as the target cutting tool is vertically opened through the top of the frame sleeve 753. The frame sleeve 753 is designed to limit the sputtering area to the inner area of ​​the frame sleeve 753, which can prevent the sputtered target material from depositing outside the frame sleeve 753 and increasing the subsequent cleaning work. At the same time, it can also prevent the sputtered target material from depositing outside the film-forming area or the unformed area, which would affect the final film quality.

[0068] Both sides of the frame sleeve 753 are fixedly provided with side plates 755. The outer sides of the two connecting arms 751 are fixedly provided with round rods 756 that can move through the side plates 755 at their respective positions. The outer side of the round rods 756 is movably sleeved with springs 757 that fix and connect the corresponding connecting arms 751 and the side plates 755. When the springs 757 are in their natural state, the end of the round rod 756 near the side plate 755 still maintains the state of moving through the corresponding side plate 755 (this state is to be set as the farthest distance between the mounting bracket 76 and the target tool, while the closest distance is set as the side of the frame plate 752 away from the mounting bracket 76 being tangent to the closest point of the round hole 754 from the mounting bracket 76). In this state, the end of the frame sleeve 753 away from the mounting bracket 76 is in contact with the inner wall of the ring support 64, that is, the clamped and fixed tool is directly opposite the round hole 754 on the frame sleeve 753.

[0069] It should be noted that during the sputtering coating process on the machining part of the target tool, the distance between the sputtering head 78 and the target tool is first adjusted by controlling the rotation of the servo motor driven screw 74 according to the film formation requirements. Then, while the cross lifting plate 63 reciprocates, it drives the ring support 64 to reciprocate. During this process, the top of the target tool passes through the round hole 754 at the bottom of the frame sleeve 753 and enters the sputtering area inside the frame sleeve 753. Then, during the reciprocating motion of the ring support 64, the machining part of the target tool is coated in alternating forward and reverse circles. Example 3

[0070] Referring to Figures 7 and 9 in the specification, a PVD coating preparation device for a cemented carbide cutting tool according to an embodiment of the present invention includes an auxiliary control component 57 disposed on the top of a pallet 51. The auxiliary control component 57 includes a ring tube 571 and a T-shaped column 572 fixed on the top of the pallet 51 in a concentric arrangement, with the T-shaped column 572 disposed inside the ring tube 571 and a stop member provided between the T-shaped column 572 and the ring tube 571.

[0071] The auxiliary control component 57 also includes a lifting plate 578 located above the pallet 51. The outer side of the lifting plate 578 is provided with an arc-shaped card slot corresponding to the position of each ring plate 533. Each ring plate 533 is movably connected to the corresponding arc-shaped card slot, which can drive multiple ring plates 533 to move up and down synchronously during the lifting process of the lifting plate 578, so as to realize synchronous control of the clamping status of the clamping blocks 535 on multiple clamping stations.

[0072] The stop component includes a push ring 573 movably sleeved on the outside of the T-shaped post 572 and multiple T-shaped blocks 575 evenly distributed in a ring shape, movably penetrating the side of the ring tube 571. A spring 577 is fixedly connected between one end of the T-shaped block 575 located inside the ring tube 571 and the inner wall of the ring tube 571. A trapezoidal groove 576 is vertically penetrating the top of the end of the T-shaped block 575 located inside the ring tube 571. A pressure strip 574 is fixedly provided at the bottom of the push ring 573 corresponding to the position of the trapezoidal groove 576, with the bottom end of the pressure strip 574 extending into the trapezoidal groove 576. Among them, the top of the end of the T-block 575 extending to the outside of the ring tube 571 is set as an inclined surface, and when the second spring 577 is in the natural state, the diameter of the circle formed by the farthest point of the end of the multiple T-blocks 575 extending to the outside of the ring tube 571 is larger than the diameter of the inner ring of the center of the lifting plate 578, and the lower end of the inclined surface of the bottom of the pressure bar 574 is in contact with the upper end of the inclined surface on the trapezoidal groove 576. At the same time, when the clamping block 535 is in the state of clamping and fixing the corresponding tool, the height of the lifting plate 578 is above the T-block 575.

[0073] It should be noted that during the disassembly and assembly of the target tool, pressing down on the push ring 573 causes multiple pressure bars 574 to descend simultaneously, squeezing the inclined surface of the trapezoidal groove 576 on the T-block 575. This causes the corresponding T-block 575 to retract into the ring tube 571, while simultaneously stretching the corresponding spring 577. When the diameter of the circle formed by the multiple T-blocks 575 extending to the farthest point outside the ring tube 571 is smaller than the diameter of the inner central ring of the lifting plate 578, pressing down on the lifting plate 57... 8. This causes multiple ring plates 533 to press down on the corresponding spring telescopic rods 534 until the lifting plate 578 descends above the T-block 575. Then, the pressure on the lifting plate 578 is released, allowing the T-block 575 to reset under the restoring force of the corresponding spring 577. This makes the diameter of the circle formed by the furthest point of the multiple T-blocks 575 extending to the outside of the ring tube 571 larger than the diameter of the inner ring of the center of the lifting plate 578. The extended T-blocks 575 are used to lock the lifting plate 578 in place.

[0074] After the mounting end of the tool to be processed is passed through the cavity between the two opposing clamping blocks 535 and inserted into the slot on the cylinder 54, press the push ring 573 again to release the T-block 575 from the locking state of the end of the ring tube 571 against the lifting plate 578, allowing the lifting plate 578 to reset under the restoring force of the spring telescopic rod 534. The rising extrusion plate 537 can then press the corresponding clamping block 535 to clamp the target tool, making tool replacement convenient and quick.

[0075] In the above technical solution, the drive motor mentioned is a Teco servo driver with model number JSDL2-10A1; the cylinder 62 mentioned is a single-acting cylinder with model number DSA25N200; and the servo motor mentioned is a servo driver with model number JSMA-PUC02D.

[0076] 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 invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A PVD coating preparation device for cemented carbide cutting tools, comprising a frame (1) and a cavity (2), wherein the top of the cavity (2) is provided with a gas supply assembly (8) and a vacuum assembly (9), characterized in that: The cavity shell (2) has a horizontal through-channel (3) at the bottom center, and a drive shifting mechanism (4) for switching workstations is installed at the top of the frame (1) corresponding to the position of the through-channel (3). The drive shifting mechanism (4) includes a screw (41) rotatably mounted on the top of the frame (1) and a support (42) located on the top of the screw (41). A slide (43) threadedly connected to the outside of the screw (41) is fixedly provided at the bottom center of the support (42). T-shaped partitions (44) are fixedly provided at the top center and both ends of the support (42). A through groove (45) is provided on both sides of the bottom end of each T-shaped partition (44). Between each two adjacent T-shaped partitions (44), there is a workpiece carrying mechanism (5) for mounting the cutting tool to be processed. Inside the cavity (2), there is a sputtering coating mechanism (7) for coating the processing part of the cutting tool to be processed. On the cavity (2), there is a linkage mechanism (6) for controlling the workpiece carrying mechanism (5) and the sputtering coating mechanism (7) to perform linkage actions.

2. The PVD coating preparation equipment for cemented carbide cutting tools according to claim 1, characterized in that: The workpiece carrying mechanism (5) includes a support plate (51) fixed between two adjacent T-shaped partitions (44). The top of the support plate (51) is provided with a plurality of annular grooves (52) evenly distributed in a ring. The top of the support plate (51) is provided with a plurality of cylinders (54) arranged concentrically with the annular grooves (52) through a bearing. Each cylinder (54) is provided with a gear (55) fixedly sleeved on the outer side of one end extending to the bottom of the support plate (51). Each cylinder (54) is provided with a slot at the top. Each of the annular grooves (52) is movably fitted with a clamping assembly (53) for clamping and fixing the tool to be processed, and a steering assembly (56) for driving the tool to be processed to rotate is movably fitted at the bottom of the tray (51).

3. The PVD coating preparation equipment for cemented carbide cutting tools according to claim 2, characterized in that: The clamping assembly (53) includes a first ring plate (531) rotatably mounted inside the annular sink (52) via bearings and a second ring plate (533) suspended above the first ring plate (531). A U-shaped frame (532) is fixedly provided on the top of the first ring plate (531), and the bottom ends of both ends of the U-shaped frame (532) movably pass through the second ring plate (533). A spring telescopic rod (534) is fixedly installed between the second ring plate (533) and the first ring plate (531). An elastic clamping component is installed on the inner side of the U-shaped frame (532).

4. The PVD coating preparation equipment for cemented carbide cutting tools according to claim 3, characterized in that: The elastic clamping component includes two extrusion plates (537) fixed to the top of the ring plate (533) and two clamping blocks (535) located inside the U-shaped frame (532). The U-shaped frame (532) has grooves on both sides, and a straight rod (538) is fixedly installed inside each groove. The clamping blocks (535) are fixedly connected to sliders (536) that are slidably installed inside the corresponding grooves on both sides. The sliders (536) are slidably sleeved on the outside of the straight rod (538). Springs (539) are movably sleeved on the outside of both ends of the straight rod (538) and fixedly connected to the sliders (536) and the inner wall of the groove.

5. The PVD coating preparation equipment for cemented carbide cutting tools according to claim 2, characterized in that: The steering assembly (56) includes a cylinder (561) rotatably mounted on the bottom of the support plate (51) via a bearing. A gear (562) meshing with a gear (55) is fixedly sleeved on the outside of the cylinder (561). A rod (563) is movably inserted inside the cylinder (561). A circular plate (565) is fixedly connected to one end of the rod (563) extending to the outside of the cylinder (561). An annular groove (566) is provided on the outside of the circular plate (565). The inner side of the column tube (561) has two spiral grooves (564) arranged symmetrically about the column rod (563). The outer side of the end of the column rod (563) extending into the column tube (561) is provided with a protruding post corresponding to the position of the two spiral grooves (564). The two protruding posts are slidably connected to the inside of the corresponding spiral grooves (564).

6. The PVD coating preparation equipment for cemented carbide cutting tools according to claim 1, characterized in that: The linkage mechanism (6) includes through slots (69) and cross slots (610) on both sides of the cavity shell (2). Ear plates (65) are movably inserted through the inner side of both through slots (69). A ring support (64) is fixedly connected between the two ear plates (65). A cross lifting plate (63) is movably inserted through the inner side of both cross slots (610). A horizontal plate (61) is fixedly installed on both sides of the inner cavity of the cavity shell (2) at the position corresponding to the cross lifting plate (63). A cylinder (62) is fixedly installed at the bottom of the horizontal plate (61), and the telescopic end of the cylinder (62) is fixedly connected to the corresponding cross lifting plate (63). The linkage mechanism (6) also includes brackets fixed on both sides of the outer side of the cavity shell (2). Gear three (68) is rotatably mounted on both brackets. Straight racks (66) are fixedly connected to one end of the two ear plates (65) extending to the outside of the cavity shell (2). L-shaped racks (67) are fixedly connected to one end of the two cross lifting plates (63) extending to the outside of the cavity shell (2). Both the straight racks (66) and the L-shaped racks (67) mesh with gear three (68) at their respective positions.

7. The PVD coating preparation equipment for cemented carbide cutting tools according to claim 6, characterized in that: The sputtering coating mechanism (7) includes a disc (71) suspended above a ring support (64). A plurality of L-shaped cylinders (72) evenly distributed in a ring are fixedly connected between the disc (71) and the ring support (64). Each L-shaped cylinder (72) is movably fitted with a mounting bracket (76). A sputtering head (78) can be detachably installed at the bottom of each mounting bracket (76). A protective component (75) is provided on the outside of each mounting bracket (76). A servo motor is fixedly installed on the top of the disc (71). A screw (74) is fixedly connected to the end of the output shaft of the servo motor. A ring block (73) is threaded on the outside of the screw (74). A swing arm (77) is hinged between the top of each mounting bracket (76) and the ring block (73).

8. The PVD coating preparation equipment for cemented carbide cutting tools according to claim 7, characterized in that: The protective component (75) includes connecting arms (751) fixed on both sides of the mounting bracket (76), a frame plate (752) fixedly connected between the two connecting arms (751), a frame sleeve (753) movably fitted inside the frame plate (752), and a round hole (754) vertically penetrating the top of the frame sleeve (753). Both sides of the frame sleeve (753) are fixedly provided with side plates (755). The outer sides of the two connecting arms (751) are fixedly provided with round rods (756) that can move through the side plates (755) at the corresponding positions. The outer sides of the round rods (756) are movably sleeved with springs (757) that fix and connect the corresponding connecting arms (751) and the side plates (755).

9. The PVD coating preparation equipment for cemented carbide cutting tools according to claim 3, characterized in that: The workpiece carrying mechanism (5) also includes an auxiliary control component (57) set on the top of the pallet (51). The auxiliary control component (57) includes a ring tube (571) and a T-shaped column (572) fixed on the top of the pallet (51) in a concentric arrangement. The T-shaped column (572) is set inside the ring tube (571), and a stop is provided between the T-shaped column (572) and the ring tube (571). The auxiliary control component (57) also includes a lifting plate (578) located above the tray (51). An arc-shaped card slot is provided on the outer side of the lifting plate (578) corresponding to the position of each ring plate (533). Each ring plate (533) is movably connected to the corresponding arc-shaped card slot.

10. The PVD coating preparation equipment for cemented carbide cutting tools according to claim 9, characterized in that: The stop component includes a push ring (573) movably sleeved on the outside of the T-shaped column (572) and a T-shaped block (575) movably penetrating the side of the ring tube (571). One end of the T-shaped block (575) located inside the ring tube (571) is fixedly connected to the inner wall of the ring tube (571) with a spring (577). A trapezoidal groove (576) is vertically penetrating the top of the end of the T-shaped block (575) located inside the ring tube (571). A pressure strip (574) is fixedly provided at the bottom of the push ring (573) at the position corresponding to the trapezoidal groove (576). The bottom end of the pressure strip (574) extends into the trapezoidal groove (576).

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