CN109420806A - Hard metal cutting process and equipment - Google Patents
Hard metal cutting process and equipment Download PDFInfo
- Publication number
- CN109420806A CN109420806A CN201710783745.3A CN201710783745A CN109420806A CN 109420806 A CN109420806 A CN 109420806A CN 201710783745 A CN201710783745 A CN 201710783745A CN 109420806 A CN109420806 A CN 109420806A
- Authority
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- China
- Prior art keywords
- workpiece
- cathode taps
- cut
- hard metal
- bevel
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
- B23H3/00—Electrochemical machining, i.e. removing metal by passing current between an electrode and a workpiece in the presence of an electrolyte
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
- B23H11/00—Auxiliary apparatus or details, not otherwise provided for
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
- B23H11/00—Auxiliary apparatus or details, not otherwise provided for
- B23H11/003—Mounting of workpieces, e.g. working-tables
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
Abstract
A kind of hard metal cutting process, cathode taps and workpiece are provided, hole for water spraying is offered in the cathode taps, the cathode taps are placed at workpiece position to be cut at the position 0.1-0.3mm of top, the cathode taps connect DC power cathode, the workpiece connects DC power anode, from the hole for water spraying spray treatment liquid to the bevel to be cut of the workpiece, the workpiece opposite with cathode taps bevel to be cut generates chemical reaction, the swiftly flowing treatment fluid takes away reactant, with the reaction speed of workpiece bevel to be cut, adjust the position of the cathode taps or/and workpiece, the cathode taps are made to keep 0.1-0.3mm at a distance from workpiece bevel to be cut until the bevel to be cut reaches scheduled working depth.The application technique is high to hard metal stock-removing efficiency, processing cost is low.
Description
Technical field
This application involves the field of metal processing, espespecially a kind of hard metal cutting process and equipment.
Background technique
Currently, the mobile terminal cases such as mobile phone, generally using light metal alloys such as magnesium or aluminium as shell, this waits magnesium or aluminium
Alloy rigidity is lower, in process, can generally be finished using forging or die casting, then by CNC cutting.With mobile phone
The development in market, the requirement to the texture, hardness of shell are all increasing.Currently, starting in the market using superhard materials such as stainless steels
Material is used as handset shell, but the difficulty of processing of the superhard materials such as stainless steel is very big, needs more cutters, longer time
It goes to be processed.
And it is processed into mobile phone battery cover or center from one block of cuboid blank, need to remove embryo material middle section, and use CNC
Processing method, processing cost growth compared to general soft metal at double high to the loss of cutter, time, machine.
Summary of the invention
In consideration of it, it is necessary to provide a kind of hard metal cutting process and equipment high-efficient, at low cost.
In order to solve the above technical problems, providing cathode taps and workpiece, institute this application provides a kind of hard metal cutting process
It states and offers hole for water spraying in cathode taps, the cathode taps are placed in the top position 0.1-0.3mm at workpiece position to be cut
Place, the cathode taps connect DC power cathode, and the workpiece connects DC power anode, from the hole for water spraying spray treatment liquid
To the bevel to be cut of the workpiece, the workpiece opposite with cathode taps bevel to be cut generates chemical reaction, the flow at high speed
Treatment fluid take away reactant, with the reaction speed of workpiece bevel to be cut, adjust the position of the cathode taps or/and workpiece
It sets, so that the cathode taps is kept 0.1-0.3mm at a distance from workpiece bevel to be cut until the bevel to be cut reaches predetermined
Working depth.
Preferably, the hard metal workpiece is stainless steel.
Preferably, the treatment fluid include: again in mass ratio the sodium nitrate of 5-15%, 5-15% sodium chloride, be greater than
70% water.
Preferably, the treatment fluid include: again in mass ratio the sodium nitrate of 8-12%, 8-12% sodium chloride, be greater than
70% water.
Preferably, the treatment fluid includes: 10% sodium nitrate, 10% sodium chloride, greater than 70% again in mass ratio
Water.
Preferably, the treatment fluid and the workpiece position with pores generate following chemical reaction:
Mn-3e=Mn3+；
Mn-2e=Mn2+；
Cr-2e=Cr2+；
Si+2H2O-4e=SiO2(s)↓+4H+；
Fe2++ e=Fe3+；
Cr-3e=Cr3+；
Fe-2e=Fe2+；
Cr2+- e=Cr3+；
Ni-2e=Ni2+；
Fe-3e=Fe3+；
4OH-- 4e=2H2O+O2(g)↑；
Mn2++2H2O-2e=MnO2(s)↓+4H+；
2Cl-- 2e=Cl2(g)↑；
Preferably, the flow velocity degree of the treatment fluid is 10-30m/s, and the pressure of the treatment fluid is 0.5-2MPa.
Preferably, the cathode taps include conductive bodies and the insulating protective layer for being covered in the conductive bodies lateral surface,
The hole for water spraying is opened in the bottom surface in the conductive bodies and running through the conductive bodies.
Preferably, the lateral surface of the conductive bodies is equipped with the exposed portion of 0.2-0.5mm length close to bottom surface side ora terminalis,
The exposed portion is not covered by the insulating protective layer.
Preferably, the small 0.1-0.2mm of outer dimension of the outer dimension of cathode taps bevel more to be cut than the workpiece.
Preferably, the bevel to be cut of the workpiece is irregular shape, the shape of the cathode taps and the bevel to be cut
Shape it is consistent.
Preferably, the combination of multiple cathode taps constitutes the outer shape of the bevel to be cut.
Preferably, with the reaction speed of workpiece bevel to be cut, the position of the cathode taps or/and workpiece is adjusted, is wrapped
It includes:
Extrapolate the processing variable in the unit time according to the chemical reaction velocity at workpiece bevel to be cut, then according to
According to the relative position of cathode taps described in the processing variable adjust automatically in the unit time or/and the workpiece make the cathode taps with
Relative distance between the workpiece bevel to be cut is stablized between 0.1-0.3mm.
Preferably, the reaction speed of the workpiece position with pores adjusts the position of the cathode taps or/and workpiece, packet
It includes:
The cathode taps be equipped with inductor, the inductor sense in real time between cathode taps and the workpiece surface away from
From, and by control system real-time control distance between the two until workpiece bevel to be cut is cut to predetermined depth.
Preferably, the inductor is set on the bottom surface of the cathode taps, and the inductor directly detects the cathode taps
The distance between described bevel to be cut.
Preferably, in process, the cathode taps can be extended into the aperture of the workpiece, and the treatment fluid can be from holding
It is sprayed at hole and the gap of the cathode taps.
Preferably, the DC power supply is the high frequency switch power that frequency is 30KHz-100KHz, operating voltage 6-
12V。
Unresolved above-mentioned technical problem, present invention also provides a kind of equipment using above-mentioned hard metal cutting process, packets
Board, the work holder on the board are included, the cathode taps are set to the top of the work holder.
Preferably, the board includes pedestal, upwardly extends from the pedestal support arm to be formed and from the support arm
Extension is extended to form towards work holder, the extending part is above the work holder, the cathode taps
The extension is installed on towards the work holder side, the work holder is for clamping the workpiece, institute
Stating cathode taps can move in vertical direction.
The application completes the hole opening technology of entire workpiece compared to using CNC cutter, by the way of electrochemical corrosion come
Aperture, process velocity is fast, high-efficient, at low cost it is not necessary that cutter is lost, and after processing is completed, then is aided with the finishing of CNC cutter
Reach the precision of the pure CNC processing of tradition.
Detailed description of the invention
The drawings described herein are used to provide a further understanding of the present application, constitutes part of this application, this Shen
Illustrative embodiments and their description please are not constituted an undue limitation on the present application for explaining the application.
Fig. 1 is the first schematic diagram of the application hard metal cutting process；
Fig. 2 is the second schematic diagram of the application hard metal cutting process；
Fig. 3 is the third schematic diagram of the application hard metal cutting process；
Fig. 4 is the perspective view of the application hard metal tapping equipment.
Specific embodiment
To keep the purposes, technical schemes and advantages of the application clearer, below in conjunction with the application specific embodiment and
Technical scheme is clearly and completely described in corresponding attached drawing.Obviously, described embodiment is only the application one
Section Example, instead of all the embodiments.Based on the embodiment in the application, those of ordinary skill in the art are not doing
Every other embodiment obtained under the premise of creative work out, shall fall in the protection scope of this application.
Three machining state figures for showing the application hard metal cutting process are please referred to Fig.1 to Fig.3, hard metal is with stainless
For steel workpiece 40, the workpiece crude green body is rectangular parallelepiped structure, is needed the middle section of the cuboid workpiece 40 on demand
Certain thickness is cut off, the shape of excision is irregular shape, is included the following steps:
S1, cathode taps 30, workpiece 40 are provided, the cathode taps 30 is placed in the 40 top position 0.1-0.3mm of workpiece
Place；
The shape of the cathode taps 30 is consistent with the shape that the workpiece needs to cut, the outer dimension of the cathode taps 30
The small 0.1-0.2mm of size that the workpiece 40 needs to cut shape, that is, leave the surplus of 0.1-0.2mm；The cathode taps 30
The combination for needing can be several cathode taps 30 according to cutting shape.
The cathode taps 30 include conductive bodies 31 and the hole for water spraying 35 being opened in the conductive bodies 31, described to lead
Electric main body 31 includes towards the bottom surface 33 and side 34 of 40 side of workpiece, and the side surface upper part point 34 is by insulating protective layer 32
Covering, but the side 34 is equipped with the exposed portion 36 of 0.2-0.5mm length close to 33 side of bottom surface.The hole for water spraying 35
Water outlet is located on the bottom surface 33.The conductive bodies 31 of the cathode taps 50 are made of red metal material.
In one embodiment, it is equipped with inductor (not shown) in the cathode taps 30, the inductor for examining in real time
Survey the distance between the cathode taps 30 and workpiece bevel to be cut.
S2, the cathode taps 30 connect DC power cathode, and the workpiece 40 connects DC power anode；
The DC power supply is the high frequency switch power that frequency is 30KHz-100KHz, operating voltage 6-12V.
S3, from the 35 spray treatment liquid of hole for water spraying to the bevel to be cut of the workpiece 40 in the cathode taps 30；
The flow velocity of the treatment fluid is 10-30m/s, and the injection pressure of the treatment fluid is 0.5-2Mpa；
The treatment fluid includes: the sodium nitrate of 5-15%, the sodium chloride of 5-15%, the water greater than 70% again in mass ratio；
Preferably, the treatment fluid include: again in mass ratio the sodium nitrate of 8-12%, 8-12% sodium chloride, be greater than
70% water；
Preferably, the treatment fluid is heavy as follows in mass ratio: 10% sodium nitrate, 10% sodium chloride, greater than 70%
Water.
In this step, it is anti-to generate following chemistry for the position with pores of relatively described 30 bottom surface of cathode taps of stainless steel work-piece 40
It answers:
Mn-3e=Mn3+
Mn-2e=Mn2+
Cr-2e=Cr2+
Si+2H2O-4e=SiO2(s)↓+4H+
Fe2++ e=Fe3+
Cr-3e=Cr3+
Fe-2e=Fe2+
Cr2+- e=Cr3+
Ni-2e=Ni2+
Fe-3e=Fe3+
4OH-- 4e=2H2O+O2(g)↑
Mn2++2H2O-2e=MnO2(s)↓+4H+
2Cl-- 2e=Cl2(g)↑
Part conductor exposed because of the side of the cathode taps 30 simultaneously, i.e., the presence in exposed portion 36 are understood because of discharge effect,
The region that the workpiece generates chemical reaction can be slightly larger than the outer dimension of the cathode taps 30, i.e., the shape of the described cathode taps 30
Size can be less than the size in cutting face, leave the surplus of 0.1-0.2mm.
The swiftly flowing treatment fluid can take away the product of the chemical reaction, keep the bevel to be cut of the workpiece continuous
" recess " is at groove until being recessed to scheduled thickness.
S4, with the removal amount of electrochemical reaction at the workpiece 40 bevel to be cut, mobile cathode taps 30 or/and described
Workpiece 40 in the distance of vertical direction, make the cathode taps 30 be maintained at a distance from the bevel to be cut of workpiece 0.1-0.3mm it
Between；
This step is as shown in Figure 1, Figure 2, Figure 3 shows, and the cutting of part workpiece 40 does not need to need to leave through workpiece certain
Thickness, referring momentarily to shown in Fig. 1, Fig. 2；The cutting of part workpiece 40 is needed through workpiece, referring momentarily to shown in Fig. 1 to Fig. 3.
This step can go out the processing variable in the unit time, the cathode taps 30 according to the speed calculation of chemical reaction
Or/and the workpiece 40 is relatively moved according to the processing variable in the unit time so that the cathode taps 30 and the workpiece 40
The relative distance in face to be processed is stablized between 0.1-0.3mm；
In another embodiment, the inductor in the cathode taps 30 senses cathode taps 30 and the workpiece 40 in real time
The distance between face to be processed, and by control system real-time control distance between the two until the face to be processed of workpiece is cut
Until predetermined thickness.The inductor is set on the bottom surface of the cathode taps 30, and the inductor directly detects the cathode
The distance between first 30 and the face to be processed, and control system is notified to be adjusted.
At this point, the cathode taps 30 can extend into the dented space in face to be processed of the workpiece, and it is described to be processed
The outer dimension of the dented space in face can be slightly larger than the outer dimension of the cathode taps 30 because of electric discharge factor, and the treatment fluid can be from
Dented space at the face to be processed and ejection at the gap of the cathode taps 30.The cathode taps 30 and the workpiece 40 it
Between change in location until scheduled moving distance complete processing until.
S5, it is finished using to be processed face edge of the CNC cutter to the workpiece.
The application completes the Cutting Process of entire workpiece compared to using CNC cutter, by the way of electrochemical corrosion come
Machining, process velocity is fast, high-efficient, at low cost it is not necessary that cutter is lost, and after processing is completed, then is aided with the finishing of CNC cutter
It can reach the precision of the pure CNC processing of tradition.
Please refer to shown in Fig. 4, be the application hard metal cutting apparatus diagram, including board 10, be set to the board 10
On work holder 20 and the cathode taps 30 above the work holder 20.
The board 10 includes pedestal 11, upwardly extends from the pedestal 11 support arm 12 to be formed and from the support
Arm 12 extends to form extension 13 towards work holder 20.The extension 13 is located on the work holder 20
Side, the cathode taps 30 are installed on the extension 13 towards 20 side of work holder.The work holder
20 for clamping the workpiece 40, and the cathode taps 30 can move in vertical direction, and the specific structure of the cathode taps 30 is such as
Aforementioned, details are not described herein again.
The operation principles of the application hard metal cutting apparatus have been described in detail in process introduction part, herein no longer
It repeats.
It should also be noted that, the terms "include", "comprise" or its any other variant are intended to nonexcludability
It include so that the process, method, commodity or the equipment that include a series of elements not only include those elements, but also to wrap
Include other elements that are not explicitly listed, or further include for this process, method, commodity or equipment intrinsic want
Element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that including described want
There is also other identical elements in the process, method of element, commodity or equipment.
The above description is only an example of the present application, is not intended to limit this application.For those skilled in the art
For, various changes and changes are possible in this application.All any modifications made within the spirit and principles of the present application are equal
Replacement, improvement etc., should be included within the scope of the claims of this application.
Claims (19)
1. a kind of hard metal cutting process, which is characterized in that provide cathode taps and workpiece, offer water spray in the cathode taps
The cathode taps are placed at workpiece position to be cut at the position 0.1-0.3mm of top by hole, and the cathode taps connect direct current
Power cathode, the workpiece connect DC power anode, from the hole for water spraying spray treatment liquid to the bevel to be cut of the workpiece,
The workpiece opposite with cathode taps bevel to be cut generates chemical reaction, and the swiftly flowing treatment fluid takes away reactant, with
The reaction speed of the workpiece bevel to be cut, adjusts the position of the cathode taps or/and workpiece, makes the cathode taps and the work
The distance of part bevel to be cut keeps 0.1-0.3mm until the bevel to be cut reaches scheduled working depth.
2. hard metal cutting process as described in claim 1, which is characterized in that the hard metal workpiece is stainless steel.
3. hard metal cutting process as claimed in claim 2, which is characterized in that the treatment fluid includes: 5- again in mass ratio
Sodium chloride, the water greater than 70% of 15% sodium nitrate, 5-15%.
4. hard metal cutting process as claimed in claim 3, which is characterized in that the treatment fluid includes: 8- again in mass ratio
Sodium chloride, the water greater than 70% of 12% sodium nitrate, 8-12%.
5. hard metal cutting process as claimed in claim 4, which is characterized in that the treatment fluid includes: again in mass ratio
10% sodium nitrate, 10% sodium chloride, the water greater than 70%.
6. hard metal cutting process as claimed in claim 5, which is characterized in that the treatment fluid and the workpiece position of opening
Place generates following chemical reaction:
Mn-3e=Mn3+；
Mn-2e=Mn2+；
Cr-2e=Cr2+；
Si+2H2O-4e=SiO2(s)↓+4H+；
Fe2++ e=Fe3+；
Cr-3e=Cr3+；
Fe-2e=Fe2+；
Cr2+- e=Cr3+；
Ni-2e=Ni2+；
Fe-3e=Fe3+；
4OH-- 4e=2H2O+O2(g)↑；
Mn2++2H2O-2e=MnO2(s)↓+4H+；
2Cl-- 2e=Cl2(g)↑；
7. hard metal cutting process as claimed in any one of claims 1 to 6, which is characterized in that the flow velocity degree of the treatment fluid is
10-30m/s, the pressure of the treatment fluid are 0.5-2MPa.
8. hard metal cutting process as claimed in any one of claims 1 to 6, which is characterized in that the cathode taps include conductive main
Body and the insulating protective layer for being covered in the conductive bodies lateral surface, the hole for water spraying are opened in the conductive bodies and run through
The bottom surface of the conductive bodies.
9. hard metal cutting process as claimed in claim 8, which is characterized in that the lateral surface of the conductive bodies is close to bottom surface
Side ora terminalis is equipped with the exposed portion of 0.2-0.5mm length, and the exposed portion is not covered by the insulating protective layer.
10. hard metal cutting process as claimed in claim 9, which is characterized in that described in the outer dimension ratio of the cathode taps
The small 0.1-0.2mm of outer dimension of workpiece bevel to be cut.
11. hard metal cutting process as claimed in claim 10, which is characterized in that the bevel to be cut of the workpiece is irregular
Shape, the shape of the cathode taps are consistent with the shape of the bevel to be cut.
12. hard metal cutting process as claimed in claim 11, which is characterized in that the combinations of multiple cathode taps constitute it is described to
The outer shape in cutting face.
13. hard metal cutting process as claimed in any one of claims 1 to 6, which is characterized in that with workpiece bevel to be cut
Reaction speed, adjust the position of the cathode taps or/and workpiece, comprising:
The processing variable in the unit time is extrapolated according to the chemical reaction velocity at workpiece bevel to be cut, then according to single
The relative position of cathode taps or/and the workpiece described in processing variable adjust automatically in the time of position make the cathode taps with it is described
Relative distance between workpiece bevel to be cut is stablized between 0.1-0.3mm.
14. hard metal cutting process as claimed in any one of claims 1 to 6, which is characterized in that the workpiece position with pores
Reaction speed, adjust the position of the cathode taps or/and workpiece, comprising:
The cathode taps are equipped with inductor, and the inductor senses the distance between cathode taps and the workpiece surface in real time,
And by control system real-time control distance between the two until workpiece bevel to be cut is cut to predetermined depth.
15. hard metal cutting process as claimed in claim 14, which is characterized in that the inductor is set to the cathode taps
On bottom surface, the inductor directly detects the distance between the cathode taps and the bevel to be cut.
16. hard metal cutting process as claimed in any one of claims 1 to 6, which is characterized in that in process, the cathode
Head can extend into the aperture of the workpiece, and the treatment fluid can spray from the gap of aperture and the cathode taps.
17. hard metal cutting process as claimed in any one of claims 1 to 6, which is characterized in that the DC power supply is frequency
For the high frequency switch power of 30KHz-100KHz, operating voltage 6-12V.
18. a kind of equipment using the hard metal cutting process as described in claim any one of 1-6, which is characterized in that including machine
Platform, the work holder on the board, the cathode taps are set to the top of the work holder.
19. hard metal tapping equipment as claimed in claim 18, which is characterized in that the board includes pedestal, from the pedestal
It upwardly extends the support arm to be formed and extends to form extension, the extension from the support arm towards work holder
Above the work holder, the cathode taps are installed on the extension towards the work holder side,
For clamping the workpiece, the cathode taps can move the work holder in vertical direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710783745.3A CN109420806A (en) | 2017-08-31 | 2017-08-31 | Hard metal cutting process and equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710783745.3A CN109420806A (en) | 2017-08-31 | 2017-08-31 | Hard metal cutting process and equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109420806A true CN109420806A (en) | 2019-03-05 |
Family
ID=65513179
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710783745.3A Pending CN109420806A (en) | 2017-08-31 | 2017-08-31 | Hard metal cutting process and equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109420806A (en) |
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| CN105142838A (en) * | 2013-05-16 | 2015-12-09 | 三菱重工业株式会社 | Electrochemical machining tool, electrochemical machining system, and method of manufacturing perforated member |
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2017
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5759362A (en) * | 1994-11-28 | 1998-06-02 | U.S. Philips Corporation | Electrode for electrochemical machining |
| CN1565786A (en) * | 2003-07-07 | 2005-01-19 | 涂肇嘉 | Combined material electrode for electrodischarge machining and is manufacturing method |
| CN102107304A (en) * | 2009-12-25 | 2011-06-29 | 财团法人金属工业研究发展中心 | Electrochemical processing equipment and processing method and electrode unit thereof |
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| CN103962662A (en) * | 2014-05-15 | 2014-08-06 | 章华 | Method for forming valve mark |
| CN103990872A (en) * | 2014-05-26 | 2014-08-20 | 南京航空航天大学 | Electrolytic machining machine tool and working method thereof |
| CN106695036A (en) * | 2017-03-17 | 2017-05-24 | 广东工业大学 | Self-repairing tool electrode turning type discharging processing device and method |
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Application publication date: 20190305 |