CN115502433A - Machining forming cutter for micro spacing slip ring assembly and preparation method thereof - Google Patents

Machining forming cutter for micro spacing slip ring assembly and preparation method thereof Download PDF

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Publication number
CN115502433A
CN115502433A CN202211224720.7A CN202211224720A CN115502433A CN 115502433 A CN115502433 A CN 115502433A CN 202211224720 A CN202211224720 A CN 202211224720A CN 115502433 A CN115502433 A CN 115502433A
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CN
China
Prior art keywords
tool bit
diamond
slip ring
diamond tool
welding
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Pending
Application number
CN202211224720.7A
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Chinese (zh)
Inventor
吴志亮
徐星星
周平涛
卢景
周策
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China Shipping Jiujiang Jingda Technology Co ltd
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China Shipping Jiujiang Jingda Technology Co ltd
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Priority to CN202211224720.7A priority Critical patent/CN115502433A/en
Publication of CN115502433A publication Critical patent/CN115502433A/en
Pending legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B27/00—Tools for turning or boring machines; Tools of a similar kind in general; Accessories therefor
    • B23B27/14—Cutting tools of which the bits or tips or cutting inserts are of special material
    • B23B27/18—Cutting tools of which the bits or tips or cutting inserts are of special material with cutting bits or tips or cutting inserts rigidly mounted, e.g. by brazing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
    • B23P15/28—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass cutting tools

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)

Abstract

The invention discloses a micro spacing slip ring component machining and forming tool and a manufacturing method thereof. The design of the forming cutter is based on improving the processing efficiency and the processing quality on the basis of not changing the original process flow, the slip ring component formed by combining a metal material (H62 brass) and a non-metal material (epoxy glue) is processed and formed, the relative problems of burr-free flanging among loops of the slip ring body, surface smoothness improvement, cutter service life improvement and the like are ensured, and meanwhile, the relative performance indexes of the slip ring component such as insulation resistance, electric strength resistance, environmental adaptability and the like can be improved.

Description

Machining forming cutter for micro spacing slip ring assembly and preparation method thereof
Technical Field
The invention relates to a cutter, in particular to a machining and forming cutter for a micro spacing slip ring assembly and a preparation method thereof.
Background
The conductive slip ring is also called a rotary connector, and is a device for realizing power and signal transmission between two relative rotating systems. In recent years, equipment systems are developed towards miniaturization and integration, so that the size space of the conductive slip ring is smaller and smaller on the premise of ensuring multiple loops and high performance. Although several domestic units produce the miniature conductive slip rings, the technical difficulty of the miniature conductive slip rings is high, and the stability of the miniature conductive slip rings is not high, so that the miniature conductive slip rings can not meet the wide requirements of the domestic military industry at present. The core technology for producing the high-quality conductive slip ring lies in the manufacturing of the slip ring component, and the precision machining of the slip ring component is a key procedure in the production process, and directly influences the comprehensive performance indexes of the product, mainly comprising insulation resistance, electric resistance, friction torque, working life and the like. Referring to fig. 1, because two different materials (metal material: H62 brass and non-metal material: epoxy glue) are inlaid together in precision machining of the slip ring assembly, the slip ring assembly has a compact structure size and a fine product, the width of the brass ring is only 0.25mm, and the width of the epoxy glue is only 0.1mm, due to the difference of the performance and hardness of the two materials, diamond particles added in the epoxy glue aggravate the abrasion of the cutter, so that the metal material is easy to generate defects of incapability of removing burr and flanging, poor surface smoothness, short cutter service life and the like in the precision machining process, and the performance and functional indexes of the slip ring assembly, such as insulation resistance, electric resistance, friction torque, working life, appearance and the like, are seriously influenced.
Disclosure of Invention
The invention aims to provide a micro spacing slip ring assembly machining and forming tool which is low in cost, long in service life, stable in performance, standard in operating equipment and capable of meeting the requirement of batch production.
The second purpose of the invention is to provide a preparation method of the micro spacing slip ring assembly machining forming cutter, which is simple to operate.
The first object of the present invention is achieved by:
the utility model provides a miniature interval slip ring subassembly machine-shaping cutter, includes handle of a knife 2 of being made by quenching steel, the characteristic is: a diamond tool bit (PCD) 1 is arranged at the front end of the tool shank 2, an included angle between a first side 3 of the PCD tool bit 1 and a bottom perpendicular 8 of the tool shank 2 is alpha 1= 8-9 degrees, an included angle between a second side 4 of the front end of the tool shank 2 and the bottom perpendicular 8 of the tool shank 2 is alpha 2= 38-40 degrees, an included angle between a third side 5 of the front end of the tool shank 2 and a overlooking side horizontal line 9 of the tool shank 2 is alpha 3= 8-9 degrees, an included angle between a first side 6 of a horizontal side end of the diamond tool bit 1 and a horizontal side horizontal line 10 of the tool shank 2 is alpha 4= 4-5 degrees, an included angle between a second side 7 of the horizontal side end of the diamond tool bit 1 and a bottom perpendicular 11 of the horizontal side of the tool shank 2 is alpha 5= 7-8 degrees, and gamma is not more than R0.03.
The second object of the present invention is achieved by:
a preparation method of a micro spacing slip ring component machining forming cutter comprises the following specific steps:
A. the cutting method of the diamond tool bit comprises the following steps:
the diamond tool bit has high hardness and wear resistance, the diamond tool bit is machined by adopting an electric spark wire for cutting, and the metal in the diamond material is melted by the highly concentrated pulse discharge energy and the strong discharge explosive force of the electric spark machining, so that a required triangular tool bit blank is formed;
B. the welding method comprises the following steps:
before welding, gasoline and a brush are adopted to thoroughly clean an oxide layer and oil stains on the surface of a triangular tool bit blank, a diamond tool bit and a tool holder are clamped and fixed in a combined mode by adopting a special mechanical tool, the diamond tool bit is pressed at the front end of the tool holder formed by a hard alloy substrate in a vacuum brazing mode, and a high-frequency induction heating brazing material BNi-2 is arranged on the diamond tool bit;
C. the sharpening method comprises the following steps:
grinding between the grinding wheel abrasive and the diamond tool bit is interaction between two materials with similar hardness, the diamond grinding wheel is ground by adopting the Switzerland eagle RS15 according to a grinding machine and a ceramic bond, the rotating speed of the machine tool is controlled to be 4000-6000r/min, and water-soluble cooling liquid is added to improve the grinding efficiency and the grinding precision of the diamond tool bit, so that the formed cutter is obtained.
In the step B, in the welding process of the diamond tool bit, the selection of the welding temperature, the welding flux and the welding alloy directly influences the performance of the welded cutter; in the welding process, the welding temperature is controlled to be 660-690 ℃, and if the welding temperature is too low, the welding strength is insufficient; if the welding temperature is too high, the diamond tool bit is easy to graphitize and may cause over-burning, which affects the combination of the diamond tool bit and the hard alloy matrix.
According to the processing characteristics of the product, the forming cutter is designed to a specially-made angle, the diamond tool bit is made of fine-particle diamond, and the manufacturing precision of the forming cutter can be measured on line through a high-precision micro-grinding machine (Switzerland Aveger RS15 in-view grinding machine) so as to achieve the purpose that the manufacturing precision of the final forming cutter meets the design requirement. The design of the forming cutter is based on that the original process flow is not changed, the processing efficiency and the processing quality are improved, the forming cutter can machine and form the slip ring assembly formed by combining a metal material (H62 brass) and a non-metal material (epoxy glue), burr-free flanging among loops of the slip ring assembly is ensured, the surface finish of a product is improved, the service life of the cutter is prolonged, and meanwhile, the related performance indexes of the slip ring assembly, such as insulation resistance, electric strength resistance, environmental adaptability and the like, can be improved.
By the design of the special angle of the forming cutter and the optimized selection of materials, the service life of the cutter can be prolonged by 10 times, the surface smoothness of a product is increased to 0.2 mu M, the insulating property of a processed slip ring component is increased to 250 MOmega, the electric strength is increased to 300V, the friction coefficient is reduced by 0.2, the service life is prolonged by 10 times, and the quality problem of burr-free flanging is solved.
The cutter has the advantages of low cost, long service life and stable performance, and operating equipment is of a standard model and can meet the requirement of batch production.
Drawings
Fig. 1 is a schematic structural view of a processed slip ring assembly, in which: 101 is brass, 102 is epoxy glue;
FIG. 2 is a schematic view of the forming tool of the present invention;
FIG. 3 is a top view of FIG. 2;
FIG. 4 is a perspective view of the forming tool;
FIG. 5 is an enlarged schematic view of a diamond tip of the profiling tool;
fig. 6 is a schematic view of a diamond tip.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the following examples are only for illustrating the invention and are not to be construed as limiting the invention.
A micro-spacing slip ring assembly machining and forming cutter comprises a cutter handle 2 made of quenched steel, wherein a diamond cutter head (PCD) 1 is arranged at the front end of the cutter handle 2, an included angle between a first side 3 of the PCD cutter head 1 and a bottom perpendicular 8 of the cutter handle 2 is alpha 1= 8-9 degrees, an included angle between a second side 4 of the front end of the cutter handle 2 and the bottom perpendicular 8 of the cutter handle 2 is alpha 2= 38-40 degrees, an included angle between a third side 5 of the front end of the cutter handle 2 and a overlooking side horizontal line 9 of the cutter handle 2 is alpha 3= 8-9 degrees, an included angle between a first side 6 of a horizontal side end of the PCD cutter head 1 and a horizontal side horizontal line 10 of the cutter handle 2 is alpha 4= 4-5 degrees, an included angle between a second side 7 of the horizontal side of the diamond cutter head 1 and a bottom perpendicular 11 of the horizontal side of the cutter handle 2 is alpha 5-7 degrees, and gamma is not more than R0.03 degrees. A preparation method of a micro spacing slip ring component machining forming cutter comprises the following specific steps:
A. the cutting method of the diamond tool bit comprises the following steps:
the diamond tool bit has high hardness and wear resistance, the diamond tool bit is machined by adopting an electric spark wire for cutting, and the metal in the diamond material is melted by the highly concentrated pulse discharge energy and the strong discharge explosive force of the electric spark machining, so that a required triangular tool bit blank is formed;
B. the welding method comprises the following steps:
before welding, gasoline and a brush are adopted to thoroughly clean an oxide layer and oil stains on the surface of a triangular tool bit blank, a diamond tool bit and a tool shank are combined in a clamping mode by adopting a special mechanical tool, the diamond tool bit is pressed at the front end of the tool shank formed by a hard alloy matrix in a vacuum brazing mode, and a high-frequency induction heating brazing material BNi-2 is arranged on the diamond tool bit;
C. the sharpening method comprises the following steps:
grinding between the grinding wheel abrasive and the diamond tool bit is interaction between two materials with similar hardness, the diamond grinding wheel is ground by adopting the Switzerland eagle RS15 according to a grinding machine and a ceramic bond, the rotating speed of the machine tool is controlled to be 4000-6000r/min, and water-soluble cooling liquid is added to improve the grinding efficiency and the grinding precision of the diamond tool bit, so that the formed cutter is obtained.
In the step B, in the welding process of the diamond tool bit, the selection of the welding temperature, the welding flux and the welding alloy directly influences the performance of the welded cutter; in the welding process, the welding temperature is controlled to be 660-690 ℃, and if the welding temperature is too low, the welding strength is insufficient; if the welding temperature is too high, the diamond tool bit is easy to graphitize and may cause over-burning, which affects the combination of the diamond tool bit and the hard alloy matrix.
The PCD forming cutter has the following main properties:
(1) PCD hardness is 8000HV;
(2) the thermal conductivity of PCD is 700W/mK;
(3) the friction coefficient of PCD is generally only 0.1-0.3;
(4) the thermal expansion coefficient of PCD is only 0.9 to 1.18 multiplied by 10^ -6;
(5) PCD with high strength, good toughness, good impact resistance and fine grains is selected;
(6) knife handle: after the hard alloy matrix (tungsten steel) is quenched, the structure is martensite, and the hardness is higher than HRC 50.

Claims (3)

1. The utility model provides a miniature interval slip ring subassembly machine-shaping cutter, includes handle of a knife 2 of being made by quenching steel, its characterized in that: the diamond tool bit (1) is arranged at the front end of the tool shank (2), an included angle between a first edge (3) of the diamond tool bit (1) and a bottom perpendicular (8) of the tool shank (2) is alpha 1= 8-9 degrees, an included angle between a second edge (4) of the front end of the tool shank (2) and the bottom perpendicular (8) of the tool shank (2) is alpha 2= 38-40 degrees, an included angle between a third edge (5) of the front end of the tool shank (2) and a overlooking side horizontal line (9) of the tool shank (2) is alpha 3= 8-9 degrees, an included angle between a first edge (6) of a horizontal side end of the diamond tool bit (1) and a horizontal side horizontal line (10) of the tool shank (2) is alpha 4= 4-5 degrees, an included angle between a second edge (7) of the horizontal side end of the diamond tool bit (1) and a bottom perpendicular (11) of the horizontal side of the tool shank (2) is alpha 5-7-8 degrees, and gamma is not more than R0.03.
2. A preparation method of a micro spacing slip ring component machining forming cutter is characterized by comprising the following steps: the method comprises the following specific steps:
A. the cutting method of the diamond tool bit comprises the following steps:
the diamond tool bit has high hardness and wear resistance, the diamond tool bit is machined by adopting an electric spark wire for cutting, and the metal in the diamond material is melted by the highly concentrated pulse discharge energy and the strong discharge explosive force of the electric spark machining, so that a required triangular tool bit blank is formed;
B. the welding method comprises the following steps:
before welding, gasoline and a brush are adopted to thoroughly clean an oxide layer and oil stains on the surface of a triangular tool bit blank, a diamond tool bit and a tool holder are clamped and fixed in a combined mode by adopting a special mechanical tool, the diamond tool bit is pressed at the front end of the tool holder formed by a hard alloy substrate in a vacuum brazing mode, and a high-frequency induction heating brazing material BNi-2 is arranged on the diamond tool bit;
C. the sharpening method comprises the following steps:
grinding between the grinding wheel abrasive and the diamond tool bit is interaction between two materials with similar hardness, the diamond grinding wheel is ground by adopting a Swiss Evig RS15 depending grinding machine and ceramic bond, the rotating speed of the machine tool is controlled to be 4000-6000r/min, and water-soluble cooling liquid is added to improve the grinding efficiency and the grinding precision of the diamond tool bit, so that the formed cutter is obtained.
3. The method for preparing a micro spacing slip ring assembly machine-shaping tool according to claim 1, wherein: in the step B, in the welding process of the diamond tool bit, the selection of the welding temperature, the welding flux and the welding alloy directly influences the performance of the welded cutter; in the welding process, the welding temperature is controlled to be 660-690 ℃, and if the welding temperature is too low, the welding strength is insufficient; if the welding temperature is too high, the diamond tool bit is easy to graphitize and can cause overburning, and the combination of the diamond tool bit and the hard alloy matrix is influenced.
CN202211224720.7A 2022-10-09 2022-10-09 Machining forming cutter for micro spacing slip ring assembly and preparation method thereof Pending CN115502433A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202211224720.7A CN115502433A (en) 2022-10-09 2022-10-09 Machining forming cutter for micro spacing slip ring assembly and preparation method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202211224720.7A CN115502433A (en) 2022-10-09 2022-10-09 Machining forming cutter for micro spacing slip ring assembly and preparation method thereof

Publications (1)

Publication Number Publication Date
CN115502433A true CN115502433A (en) 2022-12-23

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ID=84508724

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202211224720.7A Pending CN115502433A (en) 2022-10-09 2022-10-09 Machining forming cutter for micro spacing slip ring assembly and preparation method thereof

Country Status (1)

Country Link
CN (1) CN115502433A (en)

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