Cutter mounting clamp for PVD (Physical Vapor Deposition) coating

Abstract

The utility model discloses a tool fixture for PVD (Physical Vapor Deposition) coating, which comprises a fixture structure, the fixture structure comprises a plug bush main body, a groove body is arranged in the plug bush main body corresponding to the edge and corner of an edge groove, a piston rod is arranged in the groove in a sliding manner, the piston rod is connected with the end wall of the groove body through a hydraulic spring, and the groove body where the hydraulic spring is located is communicated with a near-ring-shaped circulating liquid channel. The circulating liquid channel surrounds the wide head at the upper end of the tool slot, a plurality of stepped liquid-pushing liquid channels are formed in the axis direction of the tool slot at equal intervals in a penetrating mode, fixed pushing pistons are arranged in the liquid-pushing liquid channels in a sliding and sealing mode, and one ends of the fixed pushing pistons penetrate out of the liquid-pushing liquid channels to be fixed to a positioning annular belt in the upper wide head above the tool slot; according to the cutter mounting clamp, a cutter can be clamped from the periphery when a rotary table edge rod frame is arranged in a sleeving mode, shaking or shaking of the cutter during coating is avoided, the coating quality is improved, the positioning ring belt and the expansion skirt edge can prevent coating materials from entering the cutter inserting groove, the coating effect is guaranteed, and the service life of the clamp is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of PVD technology, specifically a tool holder for PVD coating. Background Technology

[0002] In modern manufacturing, the performance of cutting tools is crucial to machining efficiency and product quality, and PVD coating technology, as one of the key technologies for improving tool performance, has been widely used. PVD coating can form a thin film with special properties such as high strength, wear resistance, and heat dissipation on the tool surface, thereby improving the tool's hardness, cutting speed, and service life. During the PVD coating process, tool holders play an indispensable role in ensuring the uniformity and neatness of the coating and improving production efficiency. They are mainly used to clamp the tool and prevent it from shaking, rotating, or vibrating during the coating preparation process due to external forces such as turntable rotation and sandblasting, which could affect the coating effect.

[0003] However, current tool holders typically use positioning slots, holes, or pins to position the tool shank, thus restricting its movement in the horizontal and vertical directions. But after prolonged use, gaps can easily form between the tool and the positioning slots, holes, or pins. In this case, the tool is prone to shaking or vibrating during the coating process, and the coating material can easily spread along the gaps towards the tool shank, affecting the coating effect.

[0004] To address these issues, this invention provides a tool holder for PVD coating. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a tool holder for PVD coating, which solves the aforementioned problems.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a PVD coating tool holder, comprising a fixture structure, the fixture structure including a sleeve body, a groove, and a tool slot. The sleeve body has a convex groove corresponding to the corner of the groove, and a piston rod is slidably disposed inside the groove. A hydraulic spring is piston-pressed inside the groove, with the end of the hydraulic spring away from the piston pressing against the end wall of the groove. The grooves containing the hydraulic springs are interconnected with near-annular circulating fluid channels on the centrifugal side of the sleeve body corresponding to the piston rod. Several stepped hydraulic push channels are equidistantly arranged around the axial direction of the tool slot, and a fixed-push piston is slidably and sealed inside the hydraulic push channels. One end of the fixed-push piston extends through the hydraulic push channels into the tool slot and is fixed to a positioning ring inside the upper wide head of the tool slot.

[0007] Preferably, the insert body has upper and lower layers, and the upper and lower layers are connected as one unit by a number of support rods distributed in a ring along the axis on the centrifugal side.

[0008] Preferably, the circulating fluid channel is formed around the wide end of the upper end of the tool slot.

[0009] Preferably, a prismatic groove is formed through the center of the insert body, and a prismatic tool slot is formed through the support rod of the insert body.

[0010] Preferably, the fixed-thrust piston has a cross-shaped piston structure, and an annular plate is integrally provided on the rod body. A positioning spring is sleeved on the annular surface of the annular plate near the tool slot on the rod body of the fixed-thrust piston. The end of the positioning spring near the tool slot is fixed to the inner wall of the hydraulic propulsion channel.

[0011] Preferably, the positioning ring belt is composed of a high-temperature resistant ring plate and a high-temperature resistant stretchable connecting belt, wherein the ring plate is fixed to the through end of the fixed-push piston.

[0012] Preferably, the lower ring edge of the positioning ring is fixedly provided with a stretchable extended skirt, and the extended skirt slides in contact with the inner wall of the wide end of the tool slot, and the positioning ring is tightly attached to the connection position between the tool holder and the tool after it is contracted. Beneficial effects

[0013] This invention provides a tool holder for PVD coating. Compared with the prior art, it has the following advantages:

[0014] (1) The tool holder for PVD coating, through the setting of hydraulic spring, piston rod, circulating fluid channel, hydraulic push fluid channel and fixed push piston, when the fixture structure is fitted on the turntable prism frame for PVD coating, the turntable prism frame presses the piston rod, causing the hydraulic spring to be compressed. The safety fluid in the tank flows into the hydraulic push fluid channel through the circulating fluid channel to push the fixed push piston to move inward, clamping the tool inserted into the tool slot from all sides. Compared with the traditional positioning method that only relies on positioning groove, positioning hole or positioning pin, this hydraulically driven clamping method can fix the tool more tightly and stably, effectively avoiding the tool shaking or trembling during the coating process, significantly improving the uniformity and neatness of the tool coating, and thus improving the coating quality.

[0015] (2) The PVD coating tool holder, through the setting of the positioning ring belt and its extended skirt, when the fixed piston moves centripetally to stabilize the tool, the positioning ring belt that was originally stretched open relaxes and contracts, and is tightly attached to the connection position between the tool holder and the tool. Its extended skirt fits against the inner wall of the wide end of the tool slot, sealing and isolating the upper end of the slot. This setting effectively prevents the coating material from entering the tool slot during the PVD coating process, avoids the coating material accumulating in the slot and affecting the next use of the holder, and also prevents the coating area from extending along the gap to the tool holder position, ensuring the coating effect of the tool while extending the service life of the holder. Attached Figure Description

[0016] Figure 1 This is a perspective view of the external structure of this utility model;

[0017] Figure 2 This is a cross-sectional view of the structure of this utility model;

[0018] Figure 3 This is a structural disassembly diagram of this utility model;

[0019] Figure 4 This is a top view of the structure of this utility model.

[0020] In the figure: 1. Fixture structure; 11. Sleeve body; 12. Rib groove; 121. Piston rod; 122. Hydraulic spring; 123. Circulating fluid passage; 124. Hydraulic thrust fluid passage; 13. Tool slot; 131. Positioning ring; 132. Fixed thrust piston; 133. Positioning spring. Detailed Implementation

[0021] 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 embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figures 1-4A tool holder for PVD coating includes a fixture structure 1, which includes a sleeve body 11. The sleeve body 11 has upper and lower layers, and the upper and lower layers are connected by a plurality of support rods distributed in a ring along the axis on the centrifugal side. The center of the sleeve body 11 has a through groove 12 for fitting onto the prism frame of the PVD coating turntable. The support rods of the sleeve body 11 each have an upwardly through prism-shaped tool slot 13. The upper structure of the sleeve body 11 has a slot near the lower layer. The port is located at the corner of the ridge groove 12, and a convex groove is formed therein. A piston rod 121 is slidably arranged inside the groove. A hydraulic spring 122 is installed inside the groove to press against the piston rod 121. The end of the hydraulic spring 122 away from the piston presses against the end wall of the groove. The grooves where the hydraulic spring 122 is located are all interconnected with the near-annular circulating fluid channel 123 opened on the centrifugal side of the insert body 11 corresponding to the piston rod 121. The circulating fluid channel 123 is opened around the wide end of the upper end of the tool slot 13. A series of stepped hydraulic channels 124 are equidistantly spaced around the axial direction of the tool slot 13. A fixed-push piston 132 is slidably sealed inside each hydraulic channel 124. The fixed-push piston 132 has a cross-shaped piston structure, and an annular plate is integrally formed on its rod. A positioning spring 133 is fitted onto the rod of the fixed-push piston 132 on the annular surface of the annular plate near the tool slot 13. One end of the positioning spring 133 near the tool slot 13 is fixed to the inner wall of the hydraulic channel 124. One end of the device extends through the hydraulic propulsion channel 124 into the interior of the tool slot 13 and is fixed to the positioning ring 131 inside the upper wide head of the tool slot 13. The positioning ring 131 is composed of a high-temperature resistant ring plate and a high-temperature resistant stretchable connecting strip. The ring plate is fixed to the through end of the fixed-push piston 132. A stretchable extended skirt is fixedly provided on the lower ring edge of the positioning ring 131, and the extended skirt slides in contact with the inner wall of the upper wide head of the tool slot 13. After the positioning ring 131 is contracted, it is tightly attached to the connection position between the tool holder and the tool.

[0023] During operation, the tool to be coated is first inserted into the tool slot 13, and then the fixture structure 1 is fitted onto the PVD coating turntable frame through the rib groove 12. When the fixture is pressed down, the turntable frame presses the piston rod 121, causing it to push the hydraulic spring 122. The safety liquid in the slot flows into the hydraulic push channel 124 through the circulating liquid channel 123, pushing the fixed piston 132 to move inward and clamp the tool from all sides to stabilize its position. At the same time, the positioning ring 131, which was originally stretched open, relaxes and contracts, closely adhering to the connection position between the tool holder and the tool. Its extended skirt also fits against the inner wall of the wide end of the tool slot 13, sealing and isolating the upper end of the slot to prevent the coating material from entering and affecting the coating effect of the fixture and the tool.

[0024] In summary, through the arrangement of hydraulic spring 122, piston rod 121, circulating fluid channel 123, hydraulic thrust channel 124, and fixed-push piston 132, during the process of mounting the clamping structure 1 on the PVD coating turntable frame, the turntable frame presses down on the piston rod 121, causing the hydraulic spring 122 to be compressed. The safety fluid in the tank flows into the hydraulic thrust channel 124 through the circulating fluid channel 123, pushing the fixed-push piston 132 to move centripetally, clamping the tool inserted into the tool slot 13 from all sides. Compared to traditional positioning methods that rely solely on positioning slots, positioning holes, or positioning pins, this hydraulically driven clamping method can more tightly and stably fix the tool, effectively preventing the tool from shaking or vibrating during the coating process. The uniformity and neatness of the tool coating are significantly improved, thereby enhancing the coating quality. Through the positioning ring 131 and its extended skirt, when the fixed piston 132 moves centripetally to stabilize the tool, the originally stretched positioning ring 131 relaxes and contracts, tightly adhering to the connection point between the tool holder and the tool. Its extended skirt fits against the wide inner wall of the tool slot 13, sealing and isolating the upper end of the slot. This effectively prevents coating material from entering the tool slot 13 during the PVD coating process, avoiding coating material accumulation in the slot and affecting the next use of the fixture. It also prevents the coating area from extending along the gap towards the tool holder, ensuring the tool coating effect while extending the service life of the fixture.

[0025] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0026] Working principle: During operation, the tool to be coated is first inserted into the tool slot 13. Then, the clamping structure 1 is fitted onto the PVD coating turntable frame via the rib groove 12. During the fitting and pressing process, the turntable frame presses the piston rod 121, causing it to move downwards and push the hydraulic spring 122. At this time, the hydraulic spring 122 is compressed, and the safety fluid in the tank, pushed by the piston rod 121, flows into the hydraulic push channel 124 through the near-annular circulation channel 123. The fluid flowing into the hydraulic push channel 124 generates pressure, pushing the fixed-push piston 132 inside the hydraulic push channel 124 to move centripetally. When the fixed-push piston 132 moves centripetally, it clamps the tool inside the tool slot 13, applying inward pressure to the tool from all sides. The pressure stabilizes the tool position. Simultaneously, as the fixed piston 132 moves centripetally, the positioning ring 131, which was originally stretched outward by the fixed piston 132, relaxes. The positioning ring 131 consists of a high-temperature resistant ring plate and a high-temperature resistant stretchable connecting strip. After relaxation, the stretchable connecting strip contracts, causing the positioning ring 131 to contract as a whole and tightly adhere to the connection position between the tool holder and the tool. The stretchable extension skirt fixedly provided on the lower ring edge of the positioning ring 131 also contracts with the positioning ring 131 and tightly adheres to the inner wall of the wide end of the tool slot 13, performing a sealing and isolation of the upper end of the tool slot 13. This prevents the coating material from entering the tool slot 13 during the PVD coating process, which would affect the normal use of the fixture and the coating effect of the tool.

[0027] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0028] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A tool holder for PVD coating, comprising a clamping structure (1), said clamping structure (1) including a sleeve body (11), a groove (12), and a tool slot (13), characterized in that: The insert body (11) has a convex groove at the corner of the corresponding ridge groove (12) inside, and a piston rod (121) is slidably arranged inside the groove. A hydraulic spring (122) is installed on the piston rod (121) inside the groove. The end of the hydraulic spring (122) away from the piston presses against the end wall of the groove. The grooves where the hydraulic spring (122) is located are all in close annular shape with the piston rod (121) on the centrifugal side inside the insert body (11). The circulating fluid channels (123) are interconnected. The circulating fluid channels (123) are provided with several stepped fluid channels (124) that are equidistantly connected around the axis of the tool slot (13). The fluid channel (124) is provided with a sliding seal and a fixed piston (132). One end of the fixed piston (132) extends out of the fluid channel (124) into the tool slot (13) and is fixed to the positioning ring (131) inside the upper wide head of the tool slot (13).

2. The tool holder for PVD coating according to claim 1, characterized in that: The main body of the socket (11) has two layers, and the two layers are connected as one unit by a number of support rods distributed in a ring along the axis on the centrifugal side.

3. The tool holder for PVD coating according to claim 1, characterized in that: The circulating fluid channel (123) is opened around the wide end of the upper end of the tool slot (13).

4. The tool holder for PVD coating according to claim 1, characterized in that: The center of the insert body (11) is provided with a prismatic groove (12) running vertically through it, and the support rod of the insert body (11) is provided with an upwardly open prismatic tool slot (13).

5. A tool holder for PVD coating according to claim 1, characterized in that: The fixed-thrust piston (132) has a cross-shaped piston structure, and an annular plate is integrally provided on the rod body. The annular surface of the annular plate near the tool slot (13) is fitted with a positioning spring (133) on the rod body of the fixed-thrust piston (132). The end of the positioning spring (133) near the tool slot (13) is fixed on the inner wall of the hydraulic propulsion channel (124).

6. A tool holder for PVD coating according to claim 1, characterized in that: The positioning ring (131) is composed of a high-temperature resistant ring plate and a high-temperature resistant stretchable connecting belt, wherein the ring plate is fixed to the through end of the fixed thrust piston (132).

7. A tool holder for PVD coating according to claim 1, characterized in that: The lower ring edge of the positioning ring (131) is fixedly provided with a stretchable extended skirt, and the extended skirt slides in contact with the inner wall of the wide end of the tool slot (13). After the positioning ring (131) is contracted, it is tightly attached to the connection position between the tool holder and the tool.

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