阅读说明：本技术 Cbn刀片断屑器的制造方法 (Manufacturing method of CBN (cubic boron nitride) blade chip breaker ) 是由 曾敏 王若愚 胡建平 于 2018-08-03 设计创作，主要内容包括：本发明提供了一种CBN刀片断屑器的制造方法,包括以下步骤：步骤一：把整块CBN原材料放置在线切割机床工作台上,用专用夹具装夹稳定CBN原材料,保证切割时没有任何移动,用线切割机床把CBN材料切成所需的尺寸,形成CBN刀头；步骤二：准备硬质合金材质的焊接本体；步骤三：先把硬质合金本体放置在高频焊接机的工作台上。本发明无需再进行修磨,既减少了工人的劳动,同时又可以实现稳定的产品加工效果,可以精确定位,加工精度更高。(The invention provides a manufacturing method of a CBN blade chip breaker, which comprises the following steps: the method comprises the following steps: placing the whole CBN raw material on a workbench of a linear cutting machine, clamping and stabilizing the CBN raw material by using a special clamp, ensuring that the CBN raw material does not move during cutting, and cutting the CBN raw material into required sizes by using the linear cutting machine to form a CBN cutter head; step two: preparing a welding body made of hard alloy materials; step three: the hard alloy body is firstly placed on a workbench of a high-frequency welding machine. The invention does not need to be ground, thereby reducing the labor of workers, realizing stable product processing effect, realizing accurate positioning and higher processing precision.)

1. A manufacturing method of a CBN blade chip breaker is characterized by comprising the following steps:

the method comprises the following steps: placing the whole CBN raw material on a workbench of a linear cutting machine, clamping and stabilizing the CBN raw material by using a special clamp, ensuring that the CBN raw material does not move during cutting, and cutting the CBN raw material into required sizes by using the linear cutting machine to form a CBN cutter head;

step two: preparing a welding body made of a hard alloy material, wherein the manufacturing process of the hard alloy body follows the manufacturing process of a hard alloy blade in a conventional process, hard alloy powder, water and ethanol are mixed in special equipment, then pressing is carried out on a tablet press by using pressure not higher than thirty tons, both an upper die and a lower die are formed by electric spark machining, a blade blank formed by pressing is sintered at high temperature of 1400 ℃ in a sintering furnace, the ethanol and the water in the blade blank are removed, then the sintered blade grinds a lower end positioning surface on a special grinding machine, and then a blade edge of the blade is ground on a special numerical control five-axis grinding machine;

step three: firstly, placing a hard alloy body on a workbench of a high-frequency welding machine, after a special clamp is fixed, placing a CBN tool bit on a placing area of the hard alloy body through a special movable clamp, and setting a high-frequency current of 50 KHz-400 KHz to weld the CBN tool bit on the hard alloy body;

step four: the method comprises the following steps that a CBN blade is clamped and welded by a special manipulator, a diamond grinding wheel is used for grinding on a special five-axis blade grinding machine to carry out cutting edge treatment and chamfer dimension grinding on the CBN blade, the conventional process route is followed, and the blade is cleaned in a special cleaning agent and then dried after grinding;

step five: the cleaned welding CBN blade is moved by special moving equipment and is placed on a special welding table;

step six: preparing a chip breaking plate with a required size by laser or linear cutting or grinding machine cutting and grinding, wherein the size and the shape of the chip breaking plate are designed and shaped according to the characteristics of a part to be processed;

step seven: a magnet is used for adsorbing a chip breaking plate on a replaceable pressure head, the replaceable pressure head is rigidly connected with an upper pressure plate, the upper pressure plate slides up and down on a guide column, a blade is placed and positioned on a base, and the upper pressure plate slides down to drive the chip breaking plate to press on the blade;

step eight: soldering or vacuum laser welding is carried out, then a specified area is precisely welded by a special welding gun, the upper pressure plate slides upwards to separate from the chip breaking plate, and the welded blade is taken out to complete chip breaking welding of the blade;

step nine: and (5) finishing welding, and cooling the blade by standing.

2. A method of manufacturing a CBN blade chip breaker as claimed in claim 1, in which the eighth step ensures that the chip breaker plate is accurately positioned and is joined to the blade by welding techniques, the chip breaker plate being able to create a robust chip breaker on the CBN blade.

Technical Field

The invention relates to a manufacturing method, in particular to a manufacturing method of a CBN blade chip breaker.

Background

At present, in the machining industry, Cubic Boron Nitride (CBN) is a novel material, can process quenched alloy steel with the hardness as high as HRC65 degrees, and can efficiently process cast iron parts at the linear velocity of 2000 m/min (the linear velocity of a conventional hard alloy blade is only 500 m/min). Because of its high price, all manufacturers at present adopt to cut the big block of expensive CBN material into small blocks (the small blocks of CBN cut are called CBN tool bit), then weld the small blocks of CBN to the body of the carbide (the placing and welding area of the CBN tool bit ground on the carbide blade is called carbide body), after welding, carry on the precision grinding process again, make the welding CBN blade reach the required precision and final dimensional requirement. At present, machining of a front cutter face of a welded Cubic Boron Nitride (CBN) blade is grinding machining of a grinding wheel, the machining of the front cutter face of the CBN blade can only be conducted on simple planes and plane combinations, all the machining of the front cutter face is a 0-degree front angle or a negative front angle in a grinding mode, the cutting of partial materials and the flow direction of cutting (particularly heat-treated alloy steel materials) cannot be controlled by the blade, the service life of the blade can be shortened due to disordered cutting forms and flow directions, the machining stability is influenced, a cutter can be damaged, parts are scrapped, and even a machine tool is. In addition, in an automatic production line and intelligent manufacturing, cutting scraps must be controllable, otherwise, manual intervention is needed for removal, automation and intelligent manufacturing cannot be realized, and a manipulator cannot be used.

Disclosure of Invention

The technical problem to be solved by the invention is to provide a manufacturing method of a CBN blade chip breaker, which is characterized in that an external chip breaker plate (the chip breaker plate is welded on a welded CBN blade and is called as a chip breaker) is precisely welded, the blade can control the chip breaking of materials and the flow direction of chips, so that the chips do not influence the processing, the stability of the process is greatly improved, the method can be used in an automatic production line and intelligent manufacturing, has extremely important significance for batch production and manufacturing, does not need to be ground, reduces the labor of workers, can realize stable product processing effect, can be precisely positioned, and has higher processing precision.

According to one aspect of the invention, a manufacturing method of a CBN blade chip breaker is provided, which is characterized by comprising the following steps:

the method comprises the following steps: placing the whole CBN raw material on a workbench of a linear cutting machine, clamping and stabilizing the CBN raw material by using a special clamp, ensuring that the CBN raw material does not move during cutting, and cutting the CBN raw material into required sizes by using the linear cutting machine to form a CBN cutter head;

step two: preparing a welding body made of a hard alloy material, wherein the manufacturing process of the hard alloy body follows the manufacturing process of a hard alloy blade in a conventional process, hard alloy powder, water and ethanol are mixed in special equipment, then pressing is carried out on a tablet press by using pressure not higher than thirty tons, both an upper die and a lower die are formed by electric spark machining, a blade blank formed by pressing is sintered at high temperature of 1400 ℃ in a sintering furnace, the ethanol and the water in the blade blank are removed, then the sintered blade grinds a lower end positioning surface on a special grinding machine, and then a blade edge of the blade is ground on a special numerical control five-axis grinding machine;

step three: firstly, placing a hard alloy body on a workbench of a high-frequency welding machine, after a special clamp is fixed, placing a CBN tool bit on a placing area of the hard alloy body through a special movable clamp, and setting a high-frequency current of 50 KHz-400 KHz to weld the CBN tool bit on the hard alloy body;

step four: the method comprises the following steps that a CBN blade is clamped and welded by a special manipulator, a diamond grinding wheel is used for grinding on a special five-axis blade grinding machine to carry out cutting edge treatment and chamfer dimension grinding on the CBN blade, the conventional process route is followed, and the blade is cleaned in a special cleaning agent and then dried after grinding;

step five: the cleaned welding CBN blade is moved by special moving equipment and is placed on a special welding table;

step six: preparing a chip breaking plate with a required size by laser or linear cutting or grinding machine cutting and grinding, wherein the size and the shape of the chip breaking plate are designed and shaped according to the characteristics of a part to be processed;

step seven: a magnet is used for adsorbing a chip breaking plate on a replaceable pressure head, the replaceable pressure head is rigidly connected with an upper pressure plate, the upper pressure plate slides up and down on a guide column, a blade is placed and positioned on a base, and the upper pressure plate slides down to drive the chip breaking plate to press on the blade;

step eight: soldering or vacuum laser welding is carried out, then a specified area is precisely welded by a special welding gun, the upper pressure plate slides upwards to separate from the chip breaking plate, and the welded blade is taken out to complete chip breaking welding of the blade;

step nine: and (5) finishing welding, and cooling the blade by standing.

Preferably, the eighth step ensures that the chip breaker plate is accurately positioned, and the chip breaker plate is combined with the cutter blade through a welding technology, so that the chip breaker plate can generate a firm chip breaker on the CBN cutter blade.

Compared with the prior art, the invention has the following beneficial effects: the invention changes the current situation that the processing of the front cutter face of the prior welding CBN blade is simple plane and plane combination of grinding wheel grinding processing, and can only realize a 0-degree front angle or a negative front angle. Through the external chip-breaking plate of accurate welding, the chip breaking of material and the flow direction of smear metal can be controlled to this type of blade, makes the smear metal not influence processing, very big promotion the stability of technology. And can be used in the automation line and intelligent manufacturing, has extremely important meaning to batch production manufacturing. The high-speed steel blade can also be provided with the chip breaker in the mode, and the chip breaker does not need to be polished, so that the labor of workers is reduced, and meanwhile, the stable product processing effect can be realized. By using the process, only a plurality of chip breaking plates (single value is very cheap relative to the blades) need to be manufactured and stocked, so that the problems of stockpiling, management and model selection of different welding CBN blades by manufacturers can be greatly reduced, and a large amount of funds of enterprises can be saved. The method for arranging the chip breaker by mechanically pressing the front cutter face of the blade in the prior art is changed, the chip breaker can be accurately positioned, the chip breaker is applied to all working conditions, the application range is enlarged, and the machining precision is higher.

Drawings

Other features, objects and advantages of the present invention will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, with reference to the accompanying drawings.

Fig. 1 is a schematic structural diagram of the special tool of the present invention.

FIG. 2 is a schematic structural view of a chip breaker and a blade in the special tool of the present invention.

Fig. 3 is a schematic structural diagram of a replaceable pressure head and a magnet in the special tool of the invention.

Detailed Description

The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that variations and modifications can be made by persons skilled in the art without departing from the spirit of the invention. All falling within the scope of the present invention.

As shown in fig. 1 to 3, the method for manufacturing the CBN blade chip breaker of the present invention comprises the steps of:

the method comprises the following steps: the method comprises the following steps of placing a whole CBN raw material on a workbench of a wire cutting machine tool, clamping and stabilizing the CBN raw material by using a special clamp, ensuring that the CBN raw material does not move during cutting, cutting the CBN material into required sizes by using the wire cutting machine tool (a slow-moving wire machine tool, the diameter of a copper wire is 0.05-0.25 mm), wherein the cut CBN material is called a CBN tool bit, and the thickness, the size and the CBN material of the CBN tool bit are designed and selected according to different actually-processed parts;

step two: preparing a welding body made of a hard alloy material, wherein the manufacturing process of the hard alloy body follows the manufacturing process of a hard alloy blade in a conventional process, the common process route is that WC (tungsten carbide), cobalt powder, ethanol and water are mixed in special equipment, then pressing is carried out on a tablet press by using pressure not higher than thirty tons, an upper die and a lower die are all formed by electric spark machining, a blade blank formed by pressing is sintered at high temperature of 1400 ℃ in a sintering furnace, the ethanol and the water in the blade blank are removed, then the sintered blade grinds the lower end positioning surface on a special grinding machine, then the blade edge is ground on a special numerical control five-axis grinding machine, and after the process is finished, a placing and welding area of a CBN tool bit is ground on the hard alloy blade, and the placing and welding area is called as the hard alloy body;

step three: firstly, placing a hard alloy body on a workbench of a high-frequency welding machine, after a special clamp is fixed, placing a CBN tool bit on a placing area (needing to be coated with special welding flux) on the hard alloy body through a special movable clamp, and setting high-frequency current of 50 KHz-400 KHz to weld the CBN tool bit on the hard alloy body;

step four: the method comprises the following steps that a CBN blade is clamped and welded by a special manipulator, a diamond grinding wheel is used for grinding on a special five-axis blade grinding machine to carry out cutting edge treatment and chamfer dimension grinding on the CBN blade, the conventional process route is followed, and the blade is cleaned in a special cleaning agent and then dried after grinding;

step five: the cleaned welding CBN blade is moved by special moving equipment and is placed on a special welding table, and a special tool is shown in figure 1;

step six: preparing a chip breaking plate with required size by laser or linear cutting or grinding machine cutting and grinding, wherein the size and shape of the chip breaking plate and the material are designed and shaped according to the characteristics of the part to be processed, the shape of the chip breaking plate can be diamond, square, rectangle, circle and the like, all the shapes of ISO blades can be made, and the shape and the size precision of the ISO blades are within +/-0.02 mm;

step seven: a magnet 7 is used for adsorbing a chip breaking plate 6 on a replaceable pressure head 4, the replaceable pressure head 4 is rigidly connected with an upper pressure plate 3, the upper pressure plate 3 can slide up and down on a guide post 2, a blade 5 is placed and positioned on a base 1, the upper pressure plate 3 slides down to drive the chip breaking plate 6 to press on the blade 5, and the relative position precision of the chip breaking plate and the blade is +/-0.005 mm;

step eight: soldering (the materials are copper (800-1100 degrees), tin (250-320 degrees) and silver (600-700 degrees) or vacuum laser welding (1100-1200 degrees), then precisely welding a specified area by using a special welding gun, sliding the upper pressure plate 3 to separate from the chip breaking plate 6, taking out the welded blade (figure 2), and finishing the chip breaking 6 welding of the blade. The process method ensures the accurate positioning of the chip breaker, combines the chip breaker 6 with the blade 5 through a welding technology, and the chip breaker 6 can generate a firm chip breaker on the CBN blade (the chip breaker is called as a chip breaker after the chip breaker is welded on the original welded CBN blade). The chip breaking plate is welded on the blade, and the key point of the process is that the welding position cannot influence a welded CBN area so as to prevent a CBN cutter head from falling or loosening to influence the processing quality;

step nine: and (5) completing welding, and cooling the blade by standing to complete the process. The chip-breaking plate 6 can be made into various required shapes due to simple processing technology, and can meet various processing requirements of customers from rough processing to finish processing after being welded with blades of different shapes.

In conclusion, the external chip breaker is welded accurately, the blade can control chip breaking of materials and the flow direction of chips, the chips do not affect processing, the stability of the process is greatly improved, the external chip breaker can be used in an automatic production line and intelligent manufacturing, the external chip breaker is of great significance to batch production and manufacturing, grinding is not needed, labor of workers is reduced, meanwhile, a stable product processing effect can be achieved, accurate positioning can be achieved, and the processing precision is higher. The invention uses tooling to position the blade, connects the blade by welding the chip breaking plate, attaches the chip breaking plate which is independently manufactured on the blade, has no requirement on the appearance of the blade by the processing mode, can be used, and has the positioning precision of +/-0.005 mm.

The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes and modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention.