Metal plate chamfering device

Abstract

The utility model relates to the technical field of metal plate machining and chamfering equipment, in particular to a metal plate chamfering device, and aims to improve the chamfering machining quality of metal plates and reduce material damage. The device comprises a cutter assembly and a mounting frame assembly. The cutter assembly comprises an inner-layer cutter head and an outer-layer blade which form a low-temperature plasma injection cavity. The inner-layer cutterhead is provided with an annular cavity groove forming a low-temperature plasma injection cavity; the outer-layer blade is provided with a wear-resistant processing layer and a jet hole. The mounting assembly is connected with the cooling airflow source and the plasma airflow source through the stepped rotating shaft body, and rotating ventilation is achieved through the rotating connector. According to the device, the low-temperature plasma technology is utilized, material surface modification, microcrack inhibition and residual stress regulation are completed while chamfering is conducted, the device is suitable for efficient precision machining of heat-sensitive materials such as aluminum alloy and titanium alloy, and high-temperature damage and follow-up treatment requirements caused by traditional cutting are avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to metal plate processing and chamfering equipment technical field, concretely relates to a metal plate chamfering device. BACKGROUND

[0002] The information disclosed in the background of the utility model is only intended to increase the understanding of the overall background of the utility model, and is not necessarily regarded as acknowledging or implicitly suggesting that the information constitutes prior art known to those skilled in the art.

[0003] Metal plate chamfering is one of the key processes in the field of mechanical manufacturing, which directly affects the assembly accuracy, fatigue life and surface quality of the workpiece. The traditional chamfering device mainly realizes chamfering forming through mechanical cutting or grinding, but there are material damage problems in actual application.

[0004] The high temperature (local temperature can reach 300-500 DEG C) generated in the cutting process of the conventional chamfering tool easily leads to material surface oxidation, phase change or micro-crack initiation, especially for heat-sensitive materials such as aluminum alloy and titanium alloy, the mechanical properties of the chamfering edge are significantly reduced; at the same time, the residual tensile stress (usually > +200MPa) caused by cutting heat will accelerate the fatigue failure of the workpiece, and additional post-processing procedures such as shot peening strengthening are required, which is high in cost and low in efficiency.

[0005] Therefore, it is necessary to study a metal plate chamfering device which can significantly improve the chamfering processing quality without changing the existing chamfering device main frame. UTILITY MODEL CONTENT

[0006] In order to solve the above technical problems, the utility model provides a metal plate chamfering device, which can complete material surface modification, inhibit micro-cracks and control residual stress at the same time of chamfering processing.

[0007] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0008] A metal plate chamfering device, comprising a cutter assembly and a mounting rack assembly, the cutter assembly comprising a blade assembly and a mounting assembly;

[0009] The blade assembly comprises an inner layer cutter head and an outer layer blade, and the inner layer cutter head and the outer layer blade are respectively provided with a first center hole and a second center hole with coinciding center lines;

[0010] The inner layer cutter head is provided with an annular cavity groove, and the annular cavity groove is provided with a plurality of first channel holes communicating with the first center hole;

[0011] The inner end face of the outer blade is sealed with the annular cavity groove to form a low-temperature plasma jetting chamber. The outer end face is provided with multiple jetting holes communicating with the low-temperature plasma jetting chamber, and a wear-resistant processing layer for chamfering is provided.

[0012] The mounting assembly includes a stepped rotating shaft body, which includes a mounting section. A drive disk is provided above the mounting section, and the upper end of the drive disk is connected to a rotary joint that communicates with a cooling airflow source and a plasma airflow source.

[0013] Below the mounting section is a functional section adapted to the first central hole. The functional section has multiple second channel holes. The upper end of the second channel hole communicates with the rotary joint, and the lower end communicates with the low-temperature plasma jet chamber through the first channel hole.

[0014] Below the functional section is a lower end shaft head that is adapted to the second central hole;

[0015] The mounting bracket assembly includes a mounting plate and a drive bracket. The mounting plate has mounting holes adapted to the mounting section, and the drive bracket is equipped with a drive device whose output end is connected to the drive disk.

[0016] Preferably, the functional segment is provided with one or more guide mounting blocks, and the first central hole is also provided with a guide mounting groove adapted to the guide mounting block. The guide mounting block and the guide mounting groove cooperate to guide and limit the inner layer cutter head, and cooperate with the lower step end face of the mounting segment to position the first channel hole and the second channel hole to communicate.

[0017] Preferably, the lower step end face or the lower shaft end face of the functional segment is provided with a matching fixing hole on the outer blade.

[0018] Preferably, the mating end faces of the inner blade disc and the outer blade are respectively provided with one or more limiting posts or limiting blind holes adapted to the limiting posts.

[0019] Preferably, the mating end face of the inner blade disc or the outer blade is provided with sealing grooves arranged on both sides of the low-temperature plasma jet chamber, and a suitable sealing ring is installed in the sealing groove.

[0020] Preferably, a bearing is fitted between the mounting section and the mounting hole.

[0021] Preferably, a limiting plate is provided between the mounting section and the drive plate, located above the mounting plate.

[0022] This utility model has at least the following beneficial effects:

[0023] This invention utilizes low-temperature plasma jetting technology to modify the material surface while performing chamfering. This method effectively suppresses the formation of microcracks and regulates residual stress, thereby significantly improving the mechanical properties and fatigue life of the workpiece.

[0024] Compared with traditional mechanical cutting or grinding methods, this invention uses low-temperature plasma jetting, which does not generate high temperatures and avoids problems such as oxidation, phase transformation or microcracks on the material surface. It is particularly suitable for processing temperature-sensitive materials such as aluminum alloys and titanium alloys.

[0025] This invention reduces subsequent processing steps (such as shot peening), thereby lowering costs and improving overall production efficiency.

[0026] This invention directly embeds plasma release into the tool body, ensuring that energy is precisely applied to the cutting zone, thereby achieving a more precise machining process. Attached Figure Description

[0027] Fig. 1 This is a schematic diagram of the overall structure of this utility model;

[0028] Fig. 2 This is a structural diagram of the installed components;

[0029] Fig. 3 This is a schematic diagram of the inner layer cutter head;

[0030] Fig. 4 This is a schematic diagram of the outer blade structure.

[0031] The reference numerals in the attached drawings are as follows: 100, mounting bracket assembly; 110, drive bracket; 200, mounting component; 210, upper shaft head; 220, drive disc; 230, lower shaft head; 240, limiting disc; 250, functional section; 251, guide mounting block; 252, second channel hole; 253, fixing hole; 260, mounting section; 270, bearing; 300, blade assembly; 310, inner blade disc; 311, low-temperature plasma jet chamber; 312, first channel hole; 313, guide mounting groove; 314, limiting post; 315, inner sealing groove; 316, outer sealing groove; 320, outer blade; 321, second center hole; 322, jet hole. Detailed Implementation

[0032] To enable those skilled in the art to better understand this utility model, the technical solution of this utility model will be further described below in conjunction with the accompanying drawings and embodiments.

[0033] Figs. 1 to 4A metal sheet beveling device is presented, including a tool assembly and a mounting bracket assembly 100, wherein the tool assembly includes a blade assembly 300 and a mounting assembly 200;

[0034] The blade assembly 300 includes an inner blade disc 310 and an outer blade 320, wherein the inner blade disc 310 and the outer blade 320 are respectively provided with a first center hole and a second center hole 321 whose center lines coincide.

[0035] The inner blade disc 310 is provided with an annular cavity groove, and the annular cavity groove has a plurality of first channel holes 312 communicating with the first central hole;

[0036] The inner end face of the outer blade 320 is sealed with the annular cavity groove to form a low-temperature plasma jetting chamber. The outer end face is provided with a plurality of jetting holes 322 communicating with the low-temperature plasma jetting chamber, and a wear-resistant processing layer is provided for chamfering, which is used for grinding and chamfering.

[0037] The mounting assembly 200 includes a stepped rotating shaft body, which includes a mounting section 260. A drive disk 220 is disposed above the mounting section 260. The upper end shaft head 210 above the drive disk 220 is connected to a rotary joint communicating with a cooling airflow source and a plasma airflow source through a threaded fastener. The rotary joint is provided with at least two pipes, which are respectively connected to the cooling airflow source and the plasma airflow source. Regarding the rotary joint, existing technology can be used. Its function is to enable one side to rotate while the other side does not rotate when air (or other fluid) is supplied. Existing technology has been used very maturely, and those skilled in the art should understand this. It will not be elaborated further here.

[0038] Below the mounting section 260, there is a functional section 250 adapted to the first central hole. The functional section 250 has multiple second channel holes 252. The upper end of the second channel hole 252 is connected to the rotary joint, and the lower end is connected to the first channel hole 312. It is also connected to the low-temperature plasma jet chamber through the first channel hole 312.

[0039] The functional section 250 is provided with a lower end shaft head 230 that is adapted to the second center hole 321. The outer blade 320 is fixed to the lower end shaft head 230 by a threaded fastener and plays a limiting role on the inner blade disc 310 to prevent the inner blade disc 310 from sliding out of the functional section 250. While fixing the outer blade 320, the inner blade disc 310 is limited and installed.

[0040] The mounting bracket assembly 100 includes a mounting plate and a drive frame 110. The mounting plate has mounting holes adapted to the mounting section 260, mainly used for positioning and mounting the mounting component 200 and the blade assembly 300 thereon. The drive frame 110 is equipped with a drive device whose output end is connected to the drive disk 220. The drive disk 220 can be a gear disk or pulley, etc., and the drive device can be a motor or electric motor, etc. The output end can be connected to the drive disk 220 through a sprocket or belt drive, so that the mounting component 200 and the blade assembly 300 can rotate on the mounting plate, thereby enabling the outer blade 320 to perform chamfering on the metal plate.

[0041] The functional segment 250 is provided with one or more guide mounting blocks 251. The first central hole is also provided with a guide mounting groove 313 adapted to the guide mounting block 251. The guide mounting block 251 and the guide mounting groove 313 cooperate to guide and limit the inner layer cutter head 310, so that the inner layer cutter head 310 rotates with the functional segment 250 and the outer layer blade 320, reducing wear and preventing the seal from being damaged. Then, the lower step end face of the mounting segment 260 is used to position the first channel hole 312 and the second channel hole 252 to communicate with each other, so that the first channel hole 312 and the second channel hole 252 are first aligned collinearly, and then stopped by the lower step end face of the mounting segment 260. Finally, the outer pressure cover of the outer layer blade 320 is used to realize the stable installation of the inner layer cutter head 310.

[0042] To ensure the secure installation of the outer blade 320, the lower step end face of the functional segment 250 or the end face of the lower shaft head 230 is provided with three or more matching fixing holes 253 on the outer blade 320. The outer blade 320 is pressed onto the lower step end face of the functional segment 250 or the end face of the lower shaft head 230 by means of threaded fasteners. In this way, the installation assembly 200 and the blade assembly 300 are integrated and installed as a whole.

[0043] To ensure a more stable fit between the inner cutter head 310 and the outer blade 320, one or more limiting posts 314 or limiting blind holes adapted to the limiting posts 314 are respectively provided on the mating end faces of the inner cutter head 310 and the outer blade 320, so that the two no longer rotate relative to each other. At the same time, the limiting posts 314 also serve as guides, making the fit between the inner cutter head 310 and the outer blade 320 more precise.

[0044] The specific sealing method of the inner cutter head 310 and the outer blade 320 can be as follows: the mating end face of the inner cutter head 310 or the outer blade 320 is provided with sealing grooves arranged on both sides of the low temperature plasma jet chamber, namely the inner sealing groove 315 and the outer sealing groove 316, and the sealing grooves are respectively equipped with matching sealing rings.

[0045] To make the rotation of the mounting assembly 200 and the blade assembly 300 more stable, thereby making the chamfering of the metal sheet more precise and stable, a bearing 270 is installed between the mounting section 260 and the mounting hole.

[0046] To further improve the installation stability of the mounting assembly 200 and the blade assembly 300, a limiting measure is added. Specifically, a limiting plate 240 is provided above the mounting plate between the mounting section 260 and the drive plate 220. The limiting plate 240 also serves to separate the drive plate 220, thereby strengthening and protecting it and preventing the transmission assembly from adversely affecting the mounting section 260, thus ensuring the smooth progress of the chamfering process.

[0047] This device utilizes low-temperature plasma technology to modify the material surface simultaneously with chamfering, suppressing microcracks and controlling residual stress. It is suitable for efficient and precision machining of heat-sensitive materials such as aluminum alloys and titanium alloys, avoiding the high-temperature damage and subsequent processing requirements of traditional cutting methods. This design significantly improves machining quality and efficiency without altering the existing device framework.

[0048] In this embodiment, the plasma is ejected along with an inert gas, specifically argon, which hardly reacts chemically with the material. This allows it to avoid surface oxidation or other chemical damage when processing precision devices (such as semiconductors and optical components). Other inert gases may be used as the cooling gas.

[0049] The terms "upper," "lower," "outer," "inner," etc., used in the specification, claims, and accompanying drawings of this utility model, are used to distinguish relative positional relationships and are not necessarily qualitative. It should be understood that such data can be interchanged where appropriate so that embodiments of the utility model described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0050] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1.A metal plate chamfering device comprising a cutter assembly and a mounting assembly, characterized in that: the cutter assembly comprises a blade assembly and a mounting assembly; the blade assembly comprises an inner layer cutter and an outer layer blade, and the inner layer cutter and the outer layer blade are respectively provided with a first center hole and a second center hole with coinciding center lines; the inner layer cutter is provided with an annular cavity groove, and the annular cavity groove is provided with a plurality of first passage holes communicating with the first center hole; the inner end surface of the outer layer blade is sealingly matched with the annular cavity groove to form a low-temperature plasma jet cavity, the outer end surface is provided with a plurality of jet holes communicating with the low-temperature plasma jet cavity, and is provided with a wear-resistant processing layer for chamfering; the mounting assembly comprises a stepped rotating shaft main body, the stepped rotating shaft main body comprises a mounting section, the mounting section is provided with a driving disc above, and the upper end shaft head above the driving disc is connected with a rotating joint communicating with a cooling gas flow source and a plasma gas flow source; the mounting section is provided with a functional section below adapted to the first center hole, a plurality of second passage holes are formed in the functional section, the upper end of the second passage hole communicates with the rotating joint, and the lower end communicates with the low-temperature plasma jet cavity through the first passage hole; the functional section is provided with a lower end shaft head below adapted to the second center hole; the mounting assembly comprises a mounting plate and a driving frame, the mounting plate is provided with a mounting hole above adapted to the mounting section, and the driving frame is provided with a driving device with an output end transmissionally connected with the driving disc. 2.The metal plate chamfering device according to claim 1, characterized in that: the functional section is provided with one or more guide mounting blocks, the first center hole is further provided with a guide mounting groove adapted to the guide mounting block, and the guide mounting block and the guide mounting groove are matched to guide and limit the inner layer cutter, and are matched with the lower step end surface of the mounting section to position the first passage hole and the second passage hole. 3.The metal plate chamfering device according to claim 2, characterized in that: the lower step end surface of the functional section or the end surface of the lower end shaft head is provided with a fixed hole above adapted to the outer layer blade. 4.The metal plate chamfering device according to claim 2, characterized in that: the matched end surfaces of the inner layer cutter and the outer layer blade are respectively provided with one or more limiting columns or limiting blind holes adapted to the limiting columns. 5.The metal plate chamfering device according to claim 2, characterized in that: the matched end surfaces of the inner layer cutter or the outer layer blade are provided with sealing grooves arranged on both sides of the low-temperature plasma jet cavity, and the sealing grooves are provided with sealing rings adapted thereto. 6.The metal plate chamfering device according to claim 2, characterized in that: a bearing is matched and installed between the mounting section and the mounting hole. 7.The metal plate chamfering device according to any one of claims 1 to 6, characterized in that: a limiting disc is arranged above the mounting plate between the mounting section and the driving disc. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​

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