CN216151376U - Device and lathe for repairing inner surface of hollow revolving body - Google Patents
Device and lathe for repairing inner surface of hollow revolving body Download PDFInfo
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- CN216151376U CN216151376U CN202121663385.1U CN202121663385U CN216151376U CN 216151376 U CN216151376 U CN 216151376U CN 202121663385 U CN202121663385 U CN 202121663385U CN 216151376 U CN216151376 U CN 216151376U
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Abstract
The utility model discloses a device for repairing the inner surface of a hollow revolving body, which comprises a mounting shaft, wherein a mounting disc is sleeved outside the mounting shaft, three concave cavities are uniformly arranged on the mounting disc in the circumferential direction, and an electrode assembly and an electromagnet are sequentially arranged in each concave cavity from inside to outside; the electrode assembly comprises a T-shaped chuck, the T-shaped chuck comprises an anti-falling tail plate and a mounting column, an electrode is mounted at the head of the mounting column, a compression spring is sleeved outside the mounting column, and an armature is arranged on one surface, close to the electromagnet, of the anti-falling tail plate; the electromagnet comprises an iron core and a coil wound outside the iron core, and two end parts of the coil are respectively connected with a zero line and a live line of an alternating current power supply; the positive pole of the pulse power supply is connected with the electrode, and the negative pole of the pulse power supply is connected with the hollow revolving body. Compared with the prior art, the technical scheme of the utility model has the advantages of high automation degree, low labor intensity, good surface treatment uniformity, high efficiency and the like.
Description
Technical Field
The utility model relates to the field of surface treatment of metal materials, in particular to a device for repairing the inner surface of a hollow revolving body and a lathe.
Background
With the progress and development of science and technology, mechanical equipment has higher and higher requirements on parts working under severe working conditions, such as parts working under the environments of high temperature, high pressure, corrosion, alternating load and the like for a long time. Therefore, the surface modification treatment of the parts and the repair technology research after the parts are damaged are carried out, and the service life of the parts is very important. The electric spark surface strengthening repair technology is approved by excellent coating performance, and particularly has wide application in the aspects of strengthening and repairing the surfaces of easily worn parts such as moulds, cutters, guide rails, rollers and the like.
At present, the problems of low automation degree, high labor intensity, poor uniformity of the treated surface, low efficiency and the like of the electric spark equipment are important bottlenecks for restricting the popularization and the application of the electric spark strengthening repair technology, so that the research on the high-efficiency and automatic electric spark strengthening equipment is very meaningful. In the prior art, the surface treatment equipment for the inner surface of the revolving body is few, the efficiency is low, and the automation degree is low.
Therefore, how to improve the efficiency and automation degree of the repairing process of the inner surface of the rotator is a technical problem to be solved by those skilled in the art.
Disclosure of Invention
In order to solve the above technical problems, the present invention provides a device and a lathe for repairing an inner surface of a hollow revolving body.
In order to achieve the above object, the present invention adopts the following technical solutions.
In a first aspect, the device for repairing the inner surface of the hollow revolving body comprises a mounting shaft, wherein a mounting disc is sleeved outside the mounting shaft, three concave cavities are uniformly arranged on the mounting disc in the circumferential direction, and an electrode assembly and an electromagnet are sequentially arranged in each concave cavity from inside to outside; the electrode assembly comprises a T-shaped chuck, the T-shaped chuck comprises an anti-falling tail plate and a mounting column, an electrode is mounted at the head of the mounting column, a compression spring is sleeved outside the mounting column, and an armature is arranged on one surface, close to the electromagnet, of the anti-falling tail plate; the electromagnet comprises an iron core and a coil wound outside the iron core, two end parts of the coil are respectively connected with a zero line and a live line of an alternating current power supply, and an extension line of the iron core radially penetrates through the axis of the mounting shaft; a radial first through hole is formed in the middle of each iron core, and the mounting column penetrates out of the first through hole; the pulse generator further comprises a pulse power supply, wherein the positive electrode of the pulse power supply is connected with the electrode, and the negative electrode of the pulse power supply is connected with the hollow revolving body.
Furthermore, a second through hole is axially formed in the mounting column, and the electrode is fixed in the second through hole of the electrode through a locking screw 8.
Further, the electrodes have multiple length specifications.
Furthermore, an insulating layer is arranged outside the electromagnet; an armature is arranged on one side, close to the electromagnet, of the anti-falling tail plate, and an insulating layer is arranged between the armature and the anti-falling tail plate.
Furthermore, the pulse power supply comprises a RC charging loop consisting of a direct current power supply, a resistor, a capacitor and a lead.
Further, the resistor is a variable resistor, and the capacitor is a variable capacitor.
In a second aspect, a lathe for repairing the inner surface of the hollow revolving body comprises a chuck, a tool rest and a tailstock, wherein the hollow revolving body to be repaired is fixed on the chuck, and the tool rest or the tailstock is connected with a device for repairing the inner surface of the hollow revolving body.
Compared with the prior art, the device for repairing the inner surface of the hollow revolving body has the advantages of high automation degree, low labor intensity, good surface treatment uniformity, high efficiency and the like.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic view of an apparatus for repairing an inner surface of a hollow rotary body according to the present invention;
FIG. 2 is a schematic view of an electrode assembly;
FIG. 3 is a schematic diagram of the operation of the electrode;
FIG. 4 is a schematic diagram of an electrode discharge process;
in the above figures:
1, mounting a shaft; 2, mounting a disc; 3 an electrode assembly; 301 anti-drop tail plate; 302 mounting a post; 303 an electrode; 4, an electromagnet; 5 compressing the spring; 6 an armature; 7 a hollow rotator.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
In the following description, specific details are set forth in order to provide a thorough understanding of the present invention. The utility model can be implemented in a number of ways different from those described herein and similar generalizations can be made by those skilled in the art without departing from the spirit of the utility model. Therefore, the present invention is not limited to the specific embodiments disclosed below.
In a first aspect, referring to fig. 1 and 2, a device for repairing an inner surface of a hollow revolving body includes a mounting shaft 1, a mounting disc 2 is sleeved outside the mounting shaft 1, three cavities are uniformly arranged on the mounting disc 2 in the circumferential direction, and an electrode assembly 3 and an electromagnet 4 are sequentially arranged in each cavity from inside to outside; the electrode assembly 3 comprises a T-shaped chuck, the T-shaped chuck comprises an anti-falling tail plate 301 and a mounting column 302, an electrode 303 is mounted at the head of the mounting column 302, a compression spring 5 is sleeved outside the mounting column 302, and an armature 6 is arranged on one surface, close to the electromagnet 4, of the anti-falling tail plate 301; the electromagnet 4 comprises an iron core and a coil wound outside the iron core, two end parts of the coil are respectively connected with a zero line and a live line of an alternating current power supply, and an extension line of the iron core radially penetrates through the axis of the mounting shaft 1; a radial first through hole is formed in the middle of each iron core, and the mounting column 302 penetrates out of the first through hole; the device further comprises a pulse power supply, wherein the positive electrode of the pulse power supply is connected with the electrode 303, and the negative electrode of the pulse power supply is connected with the hollow revolving body 7.
In the above embodiment, when the electromagnet 4 attracts the armature 6, the armature 6 moves the electrode 303 chuck, and when the electromagnet 4 does not attract the armature 6, the armature 6 returns to the initial position by the restoring force of the compression spring 5, thereby realizing the periodic vibration.
Further, a second through hole is axially formed in the mounting column 302, and the electrode 303 is fixed in the second through hole of the electrode 303 through a locking screw 8. The length of the electrode 303 exposed from the mounting post 302 can be adjusted by using the locking screw 8.
Further, in order to enable the device to process a hollow rotator 7 workpiece with a larger inner diameter range, the electrode 303 has a plurality of length specifications.
Furthermore, an insulating layer is arranged outside the electromagnet 4; an insulating layer is arranged between the armature 6 and the anti-drop tail plate 301. An insulating layer is arranged outside the electromagnet 4, and an insulating layer is arranged between the armature 6 and the anti-falling tail plate 301, so that the safety of an operator can be ensured without electric shock.
When the electromagnet 4 attracts the armature 6, the armature 6 drives the electrode 303 to move the chuck, and when the electromagnet 4 does not attract the armature 6, the armature 6 returns to the initial position under the restoring force of the compression spring 5, thereby realizing periodic vibration.
Furthermore, the pulse power supply comprises an RC charging loop consisting of a direct current power supply, a resistor, a capacitor and a lead. In the above embodiment, in a specific use, the electrode is connected to the positive electrode of the dc power supply, and the hollow rotary workpiece is connected to the negative electrode of the dc power supply.
Further, the resistor is a variable resistor, and the capacitor is a variable capacitor.
In the above embodiment, the coil of the electromagnet 4 is connected to the ac power supply, and the electromagnet 4 attracts the armature 6 to vibrate at high frequency, so that the electrode 303 is driven to vibrate at high frequency. Each electrode 303 is connected with the positive pole of a direct current power supply, the hollow revolving body 7 to be processed is connected with the negative pole of the direct current power supply, and the device for repairing the inner surface of the hollow revolving body is arranged in the hollow revolving body 7 which continuously rotates, so that the inner surface of the hollow revolving body 7 can be processed.
In a second aspect, a lathe for repairing the inner surface of the hollow revolving body comprises a chuck, a tool rest and a tailstock, wherein the hollow revolving body 7 to be repaired is fixed on the chuck, and the tool rest or the tailstock is connected with a device for repairing the inner surface of the hollow revolving body.
In the embodiment, the existing lathe is used for fixing the hollow revolving body 7 to be processed on the chuck, and the main shaft of the lathe provides power and controls the rotating speed; if the device for repairing the inner surface of the hollow revolving body is mounted on a tailstock of a lathe, a tailstock handle needs to be shaken to enable the electrode 303 to move along the axial direction of the workpiece.
The working principle of the device for strengthening and repairing the inner surface of the hollow revolving body by the electric spark is as follows:
referring to fig. 3 and 4, the device for electric spark strengthening repair of the inner surface of the hollow revolving body is as follows: the method is characterized in that instantaneous spark discharge is generated by utilizing an electrode and an air medium in a micro gap between hollow revolving body workpieces, electric energy is converted into heat energy, and substance transfer, physical, chemical and metallurgical reactions are generated on the surfaces of the electrode and the workpieces, so that a reinforced repairing layer is formed on the surfaces of the workpieces.
The key components of the device are a vibrator of an electrode and a pulse power supply, wherein the vibrator drives the electrode to periodically contact a workpiece, and the pulse power supply provides spark discharge energy. The working principle of each individual electrode is shown in fig. 3.
The electrode is connected with the anode of the direct current power supply, and the workpiece is connected with the cathode of the direct current power supply. The electrode assembly is fixedly connected with an armature of an electromagnet, the electromagnet is connected with 220V alternating current, and the vibration frequency is 50HZ at power frequency. When the electromagnetic field generating device works, the alternating electromagnetic field drives the armature to vibrate, and the armature drives the electrode to vibrate up and down.
As shown in fig. 3 a, the arrow indicates the moving direction of the electrode, and when the electrode is not yet in contact with the workpiece, the dc power supply charges the variable capacitor C through the variable resistor R.
When the electrode moves towards the workpiece and approaches the workpiece infinitely, as shown in b in fig. 3, the discharge circuit forms a path which passes instantaneously up to 105-106A in the spark discharge path/cm2High density current, the tiny area generates 5000-15000 deg.C high temperature, so that the melted small drop in the area is sputtered to the surrounding medium.
As shown in c in fig. 3, the electrode continues to approach the workpiece and is pressed together with the workpiece, the current density is sharply reduced due to the steep increase of the contact area in the discharge channel, the electrode and the workpiece are in short circuit, the spark discharge is finished, the electric energy does not heat the contact part any more, and in addition, the cooling system with huge surrounding environment causes the earlier-stage molten material to be condensed and adhered to the workpiece to form a strengthening point.
After the discharge is completed, the electrode is separated from the workpiece by the vibrator, the discharge circuit is disconnected, the dc power supply recharges the capacitor, and the next cycle is started, as shown by d in fig. 3. Thus, the charging and discharging processes are repeated, and the discharging position is uniformly changed every time, so that the strengthening points are uniformly overlapped and fused to cover the surface of the workpiece, and thus the strengthening repairing layer is generated.
In the device of fig. 1, 3 independent electrodes can work independently according to the process, so that the processing speed is higher, and the integrity and uniformity of the reinforced repairing layer are further improved.
For this device, the discharge energy (Q) can be changed by adjusting the size of the variable resistor and the capacitor (1/2 CU)2) So as to control the size of the high-temperature molten small liquid drop in the discharge channel and finally achieve the purpose of controlling the surface roughness of the repair layer. The large capacitance and the small resistance have large discharge energy and large strengthening points, and are suitable for large-area treatment in the early stage; the small capacitor and the large resistor have small discharge energy and are suitable for later-stage fine trimming.
Although the present invention has been described in detail in this specification with reference to specific embodiments and illustrative embodiments, it will be apparent to those skilled in the art that modifications and improvements can be made thereto based on the present invention. Accordingly, such modifications and improvements are intended to be within the scope of this invention as claimed.
Claims (7)
1. The device for repairing the inner surface of the hollow revolving body is characterized by comprising a mounting shaft (1), wherein a mounting disc (2) is sleeved outside the mounting shaft (1), three cavities are uniformly arranged on the mounting disc (2) in the circumferential direction, and an electrode assembly (3) and an electromagnet (4) are sequentially arranged in each cavity from inside to outside; the electrode assembly (3) comprises a T-shaped chuck, the T-shaped chuck comprises an anti-falling tail plate (301) and a mounting column (302), an electrode (303) is mounted at the head of the mounting column (302), a compression spring (5) is sleeved outside the mounting column (302), and an armature (6) is arranged on one surface, close to the electromagnet (4), of the anti-falling tail plate (301); the electromagnet (4) comprises an iron core and a coil wound outside the iron core, two end parts of the coil are respectively connected with a zero line and a live line of an alternating current power supply, and an extension line of the iron core radially penetrates through the axis of the mounting shaft (1); a radial first through hole is formed in the middle of each iron core, and the mounting column (302) penetrates out of the first through hole; the pulse generator further comprises a pulse power supply, wherein the positive electrode of the pulse power supply is connected with the electrode (303), and the negative electrode of the pulse power supply is connected with the hollow revolving body (7).
2. The device for repairing the inner surface of the hollow solid of revolution as claimed in claim 1, wherein said mounting post (302) is provided with a second through hole along the axial direction, and said electrode (303) is fixed in the second through hole of said electrode (303) by a locking screw (8).
3. The apparatus for repairing an inner surface of a hollow solid of revolution according to claim 1, wherein said electrode (303) has a plurality of length specifications.
4. The apparatus for repairing an inner surface of a hollow rotary body according to claim 1, wherein an insulating layer is provided outside the electromagnet (4); an insulating layer is arranged between the armature (6) and the anti-drop tail plate (301).
5. The apparatus for repairing an inner surface of a hollow rotary body according to claim 1, wherein said pulse power source is composed of a dc power source, a resistor, a capacitor and a wire to form an RC charging circuit.
6. The apparatus for repairing an inner surface of a hollow rotary body according to claim 5, wherein said resistor is a variable resistor and said capacitor is a variable capacitor.
7. A lathe for repairing an inner surface of a hollow rotary body, comprising a chuck to which a hollow rotary body (7) to be repaired is fixed, a tool rest and a tailstock to which the device for repairing an inner surface of a hollow rotary body according to any one of claims 1 to 6 is attached.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121663385.1U CN216151376U (en) | 2021-07-21 | 2021-07-21 | Device and lathe for repairing inner surface of hollow revolving body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121663385.1U CN216151376U (en) | 2021-07-21 | 2021-07-21 | Device and lathe for repairing inner surface of hollow revolving body |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216151376U true CN216151376U (en) | 2022-04-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121663385.1U Active CN216151376U (en) | 2021-07-21 | 2021-07-21 | Device and lathe for repairing inner surface of hollow revolving body |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216151376U (en) |
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2021
- 2021-07-21 CN CN202121663385.1U patent/CN216151376U/en active Active
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