CN220427066U - Fixed cathode deep hole electrolytic machining device capable of reducing cone difference - Google Patents
Fixed cathode deep hole electrolytic machining device capable of reducing cone difference Download PDFInfo
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- CN220427066U CN220427066U CN202322365744.0U CN202322365744U CN220427066U CN 220427066 U CN220427066 U CN 220427066U CN 202322365744 U CN202322365744 U CN 202322365744U CN 220427066 U CN220427066 U CN 220427066U
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- 238000003754 machining Methods 0.000 title claims abstract description 44
- 239000007788 liquid Substances 0.000 claims abstract description 70
- 230000000149 penetrating effect Effects 0.000 claims abstract description 3
- 239000003792 electrolyte Substances 0.000 claims description 24
- 238000000034 method Methods 0.000 abstract description 17
- 230000008901 benefit Effects 0.000 abstract description 4
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 5
- 230000003746 surface roughness Effects 0.000 description 5
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 4
- 229910052804 chromium Inorganic materials 0.000 description 3
- 239000011651 chromium Substances 0.000 description 3
- 238000005868 electrolysis reaction Methods 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 2
- 238000005530 etching Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000007747 plating Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 239000011780 sodium chloride Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002848 electrochemical method Methods 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000010297 mechanical methods and process Methods 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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Abstract
The utility model discloses a fixed cathode deep hole electrolytic machining device capable of reducing cone difference, which comprises a direct current main power supply, a cathode penetrating through the inside of a deep hole pipe, and a liquid inlet end cap and a liquid outlet end cap which are respectively arranged at two ends of the cathode; the liquid inlet end cap and the liquid outlet end cap are connected with the cathode of the direct current main power supply, and the deep hole pipe is connected with the anode of the direct current main power supply; in addition, the fixed cathode deep hole electrolytic machining device also comprises a compensation direct current power supply; and the anode of the compensation direct current power supply is connected with the deep hole pipe, and the cathode of the compensation direct current power supply is connected with the liquid outlet end cap. According to the utility model, the compensation direct current power supply is added to the liquid outlet end of the deep hole pipe, and electrolytic machining is carried out on the liquid outlet end through the current provided by the compensation direct current power supply, so that the problem that the diameter tolerance of inner holes at two ends of the deep hole pipe is out of range after electrolytic machining is solved; compared with the traditional mode, the method has the advantages of simplifying operation, having good process reproducibility and improving processing efficiency.
Description
Technical Field
The utility model relates to the technical field of deep hole electrolytic machining, and particularly discloses a fixed cathode deep hole electrolytic machining device capable of reducing cone difference.
Background
In deep hole machining, the surface roughness, the dimensional accuracy and the dimensional tolerance of the inner holes at two ends of the pipe are main factors of the quality of the inner surface of the deep hole pipe. Due to machining reasons, the size of the inner hole is not easy to control in a certain set range due to the influence of factors such as deep hole drilling, rough reaming and finish reaming, and the consistency of the size of the inner hole of the deep hole pipe in the same batch is often ensured through machining.
The electrolytic machining is essentially different from the mechanical machining, and the electrolytic machining is to optimally remove the protruding part of the surface of the inner hole by an electrochemical method so as to achieve the purpose of improving the surface roughness. The mechanical method is to increase the surface roughness by cutting, plastic deformation and other forms. These two different methods of enhancing surface roughness distinguish between subsequent processes, such as the quality of electroplated hard chrome. When hard chromium is electroplated, the quality of the inner hole surface formed by back etching is essentially different, and the plastic deformation surface is machined, so that the poor rough surface is exposed due to corrosion of the plastic deformation layer during back etching, and the binding force of chromium plating and the stress of the chromium layer are negatively influenced. In high quality electroplating processes, it is therefore often necessary to add an electrolytic process prior to hard chrome plating.
In the electrolytic machining, a deep hole pipe is used as an anode, a cathode is arranged in the deep hole pipe, and the purpose of cutting and polishing an inner hole is achieved under the action of high current density through electrolyte flowing at high speed in the deep hole pipe. Electrolytic processing is divided into a fixed cathode and a movable cathode. The fixed cathode has high processing efficiency and needs to be arranged on a high-power direct-current power supply; the movable cathode has the advantages of small power supply power and low processing efficiency due to short cathode.
The working principle of the existing electrolytic machining machine tool is shown in figure 1, wherein end caps are respectively arranged at two ends of a deep hole pipe to be subjected to electrolytic machining, the deep hole pipe is arranged on the electrolytic machining machine tool after a cathode rod is screwed, an electrolyte pump is started, after the constant voltage is stabilized, the power supply current is regulated to a required value, the power-on time is set, after the electrolysis is completed, the high-pressure pump is closed, and a workpiece is taken out to complete electrolytic machining once.
For steel material parts, the electrolytic processing liquid is sodium chloride aqueous solution, the concentration of sodium chloride is generally 14-17%, and the temperature of the electrolyte is controlled at 60 ℃. The electrolyte temperature is too high and the surface roughness is poor. The electrolytic machining current density is large and can reach 1000A/dm < 2 >, so that a large amount of heat is generated when the deep hole pipe is electrolyzed, the temperature of electrolyte in the workpiece is increased, the longer the deep hole pipe is, the more obvious the temperature rise phenomenon in the pipe is, and the resistance is changed, which is the main reason for the size difference of the two ends in the deep hole pipe.
As shown in figure 1, the outer diameters of deep hole pipes to be electrolyzed are consistent, a jointing clamp is positioned in the center of the deep hole pipe to be electrolyzed, a direct current power supply is used for supplying power, the jointing clamp is connected with a power anode, end caps at two ends are connected with a power cathode, after the electrolytic machining, the phenomenon that the inner hole size of a liquid inlet end is larger and the inner hole size of a liquid outlet end is smaller often exists, the taper difference of the inner hole sizes at two ends is larger than 0.03mm, and the tolerance range specified by the process is exceeded.
In order to ensure that the sizes of inner holes at two ends of a deep hole pipe after electrolytic machining are within a specified tolerance range, the current practice is to take down a workpiece after half of electrolytic machining is performed, and measure the sizes, wherein the sizes of liquid outlet ends of the workpiece are often smaller; and then, the direction of the workpiece is changed, and the liquid outlet end is used as the liquid inlet end, so that the flow direction of electrolyte is changed, the electrolysis time is supplemented, and the effect of reducing the dimensional tolerance of the two ends is achieved. However, the method has the disadvantages of poor reproducibility of parts in the same batch, complex operation and low working efficiency.
Disclosure of Invention
The utility model aims to solve the problems and provide a fixed cathode deep hole electrolytic machining device capable of reducing cone difference, which is simple to operate and can greatly improve working efficiency.
The aim of the utility model is achieved by the following technical scheme: a fixed cathode deep hole electrolytic machining device capable of reducing cone difference is used for carrying out electrolytic machining on a deep hole pipe and comprises a direct current main power supply, a cathode penetrating through the deep hole pipe, and a liquid inlet end cap and a liquid outlet end cap which are respectively arranged at two ends of the cathode; the liquid inlet end cap and the liquid outlet end cap are connected with the cathode of the direct current main power supply, and the deep hole pipe is connected with the anode of the direct current main power supply.
In addition, the fixed cathode deep hole electrolytic machining device capable of reducing the cone difference further comprises a compensation direct current power supply; and the anode of the compensation direct current power supply is connected with the deep hole pipe, and the cathode of the compensation direct current power supply is connected with the liquid outlet end cap.
Further, the anode of the direct current main power supply and the anode of the compensation direct current power supply are connected with the middle part of the deep hole pipe.
The middle part clamping of deep hole pipe has the binding clip, direct current main power supply's positive pole with compensation direct current power supply's positive pole all pass through the binding clip with deep hole pipe connection.
Clamping holes are formed in the liquid inlet end cap and the liquid outlet end cap, and two ends of the cathode are respectively and fixedly clamped in the clamping holes in the liquid inlet end cap and the liquid outlet end cap.
Clamping concave cavities are formed in the liquid inlet end cap and the liquid outlet end cap respectively, an insulating sleeve is arranged on the inner wall of the clamping concave cavity, and two ends of the deep hole pipe are clamped in the clamping concave cavities of the liquid inlet end cap and the liquid outlet end cap respectively; the electrolyte inlet hole communicated with the deep hole pipe is formed in the electrolyte inlet end cap, and the electrolyte outlet hole communicated with the deep hole pipe is formed in the electrolyte outlet end cap.
Compared with the prior art, the application has the following beneficial effects: according to the utility model, the compensation direct current power supply is added to the liquid outlet end of the deep hole pipe, and electrolytic machining is carried out on the liquid outlet end through the current provided by the compensation direct current power supply, so that the problem that the diameter tolerance of inner holes at two ends of the deep hole pipe is out of range after electrolytic machining is solved; compared with the traditional mode, the method has the advantages of simplifying operation, having good process reproducibility and improving processing efficiency.
Additional features of the present application will be set forth in part in the description which follows. Additional features will be set forth in part in the description which follows and in the accompanying drawings, or in part will be apparent to those skilled in the art from the description, or may be learned by the production or operation of the embodiments. The features disclosed in this application may be implemented and realized in the practice or use of the various methods, instrumentalities and combinations of the specific embodiments described below.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the application and do not limit the application. Like reference symbols in the various drawings indicate like elements. Wherein,
fig. 1 is a sectional view of a conventional stationary cathode deep hole electrochemical machining apparatus.
Fig. 2 is a cross-sectional view of the present utility model.
The reference numerals in the above figures are: 1-direct current main power supply, 2-liquid inlet end cap, 3-deep hole pipe, 4-cathode, 5-jointing clamp, 6-electrolyte inlet, 7-liquid outlet end cap, 8-electrolyte outlet, 9-compensation direct current power supply and 10-insulating sleeve.
Detailed Description
In order to make the present application solution better understood by those skilled in the art, the following description will be made in detail and with reference to the accompanying drawings in the embodiments of the present application, it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, shall fall within the scope of the present application.
It should be noted that if the terms "first," "second," and the like are referred to in the specification, claims, and drawings of the present application, they are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate in order to describe the embodiments of the present application described herein. Furthermore, if the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
In the present application, if the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like are referred to, the indicated azimuth or positional relationship is based on that shown in the drawings. These terms are used primarily to better describe the present application and its embodiments and are not intended to limit the indicated device, element or component to a particular orientation or to be constructed and operated in a particular orientation.
Also, some of the terms described above may be used to indicate other meanings in addition to orientation or positional relationships, for example, the term "upper" may also be used to indicate some sort of attachment or connection in some cases. The specific meaning of these terms in this application will be understood by those of ordinary skill in the art as appropriate.
Further, in this application, the terms "mounted," "configured," "provided," "connected," "sleeved," and the like are to be construed broadly if they refer to. For example, it may be a fixed connection, a removable connection, or a unitary construction; may be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements, or components. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.
It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The present application will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
Examples
As shown in fig. 2, the present embodiment discloses a fixed cathode deep hole electrolytic machining device capable of reducing the taper difference, which is used for electrolytic machining of the deep hole pipe 3.
Specifically, the fixed cathode deep hole electrolytic machining device comprises five parts, namely a direct current main power supply 1, a cathode 4, a liquid inlet end cap 2, a liquid outlet end cap 7 and a compensation direct current power supply 9.
When installed, the cathode 4 penetrates the deep hole tube 3 along the longitudinal direction of the deep hole tube 3. The liquid inlet end cap 2 and the liquid outlet end cap 7 are respectively provided with a clamping concave cavity, and the inner wall of the clamping concave cavity is provided with an insulating sleeve 10. The two ends of the deep hole pipe 3 are respectively clamped in the clamping concave cavity of the liquid inlet end cap 2 and the clamping concave cavity of the liquid outlet end cap 7. The deep hole pipe 3 can be isolated from the liquid inlet end cap 2 and the liquid outlet end cap 7 by the insulating sleeve 10.
In addition, an electrolyte inlet hole 6 communicated with the deep hole pipe 3 is arranged on the liquid inlet end cap 2, and an electrolyte outlet hole 8 communicated with the deep hole pipe 3 is arranged on the liquid outlet end cap 7. When the device is arranged, corresponding perforations are required to be formed in the insulating sleeve 10, so that the electrolyte inlet holes 6 and the electrolyte outlet holes 8 can be communicated with the deep hole pipe 3. Electrolyte enters the deep hole pipe 3 from the electrolyte inlet hole 6 and flows out from the electrolyte outlet hole 8 after the electrolyte is subjected to electrolytic operation.
The center of the liquid inlet end cap 2 and the center of the liquid outlet end cap 7 are respectively provided with clamping holes, and two ends of the cathode 4 are respectively and fixedly clamped in the clamping holes on the liquid inlet end cap 2 and the liquid outlet end cap 7. Thus, the cathode 4 is fixed, and the cathode 4 is coaxial with the deep hole tube 3. The liquid inlet end cap 2 and the liquid outlet end cap 7 are capable of tightening the cathode 4, and the deep hole tube 3 can be mounted on the electrolytic machine tool through the liquid inlet end cap 2 and the liquid outlet end cap 7.
In addition, the middle part clamping of deep hole pipe 3 has binding clip 5, and the positive pole of direct current main power supply 1 and the positive pole of compensation direct current power supply 9 are all connected with deep hole pipe 3 through binding clip 5. Meanwhile, the cathode of the direct current main power supply 1 is respectively connected with a liquid inlet end cap 2 and a liquid outlet end cap 7; the cathode of the compensation DC power supply 9 is connected with the liquid outlet end cap 7.
In the implementation, the utility model is arranged on an electrolytic machine tool through the liquid inlet end cap 2 and the liquid outlet end cap 7, an electrolyte pump is started, after the constant voltage is stabilized, the power supply current is regulated to a required value, the power-on time is set, and the deep hole pipe 3 is subjected to electrolytic machining.
According to the embodiment, the compensation direct current power supply is additionally added to the liquid outlet end of the deep hole pipe, and electrolytic machining is carried out on the liquid outlet end through current provided by the compensation direct current power supply, so that the electrolytic machining size of the two ends of the deep hole pipe is controlled within a tolerance of 0.03mm, the flow direction of electrolyte of the deep hole pipe is not required to be changed in the machining process, and the operation is simple; the tolerance of the inner diameters of deep holes at the two ends after electrolysis can be controlled, the reproducibility is good, and the electrolytic machining efficiency is improved. In the specific implementation, the magnitude of the compensation current is related to the alloy content of the deep hole pipe material, and the compensation current can be calculated initially according to law of law and then corrected by actual measurement.
It should be noted that all of the features disclosed in this specification, or all of the steps in a method or process disclosed, may be combined in any combination, except mutually exclusive features and/or steps.
In addition, the foregoing detailed description is exemplary, and those skilled in the art, having the benefit of this disclosure, may devise various arrangements that, although not explicitly described herein, are within the scope of the present disclosure. It should be understood by those skilled in the art that the present description and drawings are illustrative and not limiting to the claims. The scope of the utility model is defined by the claims and their equivalents.
Claims (5)
1. A fixed cathode deep hole electrolytic machining device capable of reducing cone difference is used for carrying out electrolytic machining on a deep hole pipe (3), and comprises a direct current main power supply (1), a cathode (4) penetrating through the deep hole pipe (3), and a liquid inlet end cap (2) and a liquid outlet end cap (7) which are respectively arranged at two ends of the cathode (4); the liquid inlet end cap (2) and the liquid outlet end cap (7) are connected with the cathode of the direct current main power supply (1), and the deep hole pipe (3) is connected with the anode of the direct current main power supply (1); the device is characterized by also comprising a compensation direct current power supply (9); the anode of the compensation direct current power supply (9) is connected with the deep hole pipe (3), and the cathode of the compensation direct current power supply is connected with the liquid outlet end cap (7).
2. The fixed cathode deep hole electrolytic machining device capable of reducing cone difference according to claim 1, wherein an anode of the direct current main power supply (1) and an anode of the compensation direct current power supply (9) are connected with the middle part of the deep hole pipe (3).
3. The fixed cathode deep hole electrolytic machining device capable of reducing cone difference according to claim 2, wherein a jointing clamp (5) is clamped at the middle part of the deep hole pipe (3), and the anode of the direct current main power supply (1) and the anode of the compensation direct current power supply (9) are connected with the deep hole pipe (3) through the jointing clamp (5).
4. The fixed cathode deep hole electrolytic machining device capable of reducing cone difference according to claim 1, wherein clamping holes are formed in the liquid inlet end cap (2) and the liquid outlet end cap (7), and two ends of the cathode (4) are fixedly clamped in the clamping holes in the liquid inlet end cap (2) and the liquid outlet end cap (7) respectively.
5. The fixed cathode deep hole electrolytic machining device capable of reducing cone difference according to claim 4, wherein clamping concave cavities are formed in the liquid inlet end cap (2) and the liquid outlet end cap (7), an insulating sleeve (10) is arranged on the inner wall of each clamping concave cavity, and two ends of the deep hole pipe (3) are respectively clamped in the clamping concave cavities of the liquid inlet end cap (2) and the liquid outlet end cap (7); electrolyte inlet holes (6) communicated with the deep hole pipes (3) are formed in the liquid inlet end caps (2), and electrolyte outlet holes (8) communicated with the deep hole pipes (3) are formed in the liquid outlet end caps (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322365744.0U CN220427066U (en) | 2023-08-31 | 2023-08-31 | Fixed cathode deep hole electrolytic machining device capable of reducing cone difference |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322365744.0U CN220427066U (en) | 2023-08-31 | 2023-08-31 | Fixed cathode deep hole electrolytic machining device capable of reducing cone difference |
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| Publication Number | Publication Date |
|---|---|
| CN220427066U true CN220427066U (en) | 2024-02-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322365744.0U Active CN220427066U (en) | 2023-08-31 | 2023-08-31 | Fixed cathode deep hole electrolytic machining device capable of reducing cone difference |
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| Country | Link |
|---|---|
| CN (1) | CN220427066U (en) |
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2023
- 2023-08-31 CN CN202322365744.0U patent/CN220427066U/en active Active
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