CN217781208U - Current-assisted local softening device - Google Patents
Current-assisted local softening device Download PDFInfo
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- CN217781208U CN217781208U CN202221791492.7U CN202221791492U CN217781208U CN 217781208 U CN217781208 U CN 217781208U CN 202221791492 U CN202221791492 U CN 202221791492U CN 217781208 U CN217781208 U CN 217781208U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Abstract
The utility model relates to a local softening installation is assisted to electric current for carry out local softening to self-plugging rivet's nail cover, the local softening installation is assisted to electric current includes two sets of brush blocks, direct current pulse power supply and clamping device, and the nail cover can be placed between two sets of brush blocks. The direct current pulse power supply, the two groups of electric brush blocks and the nail sleeve form a closed loop, and the clamping device is connected with the two groups of electric brush blocks and can drive the two groups of electric brush blocks to move in opposite directions or to be far away. The utility model discloses can effectively solve self-plugging rivet's the not accurate problem of nail cover local heating region.
Description
Technical Field
The utility model relates to a local softening technology of rivet cover of loosing core especially relates to a local softening installation is assisted to electric current.
Background
The titanium alloy blind rivet is a fastener for single-side connection commonly used in the field of aerospace, a rivet sleeve of the titanium alloy blind rivet is subjected to local plastic deformation in the rivet pulling process, bulges are formed in a non-open space, the local deformation of the rivet sleeve needs to ensure that different areas of the rivet sleeve have different yield strengths, namely, the rivet sleeve needs to be subjected to local strengthening or local softening treatment, and the local softening of a plastic deformation area is the first choice for realizing the difference of the strength of the rivet sleeve because the proportion of the plastic deformation area to the rivet sleeve is smaller. The main local annealing's of current titanium alloy rivet cover of loosing core heating mode is high frequency coil induction heating, however, because of induction heating is non-contact heating, the width of heating region compares the error great with the design value, and the coil of same specification can only correspond fixed heating width, and heating region width controllability is relatively poor.
Accordingly, the present inventors have developed an electric current assisted topical softening device that overcomes the shortcomings of the prior art based on experience and practice in the related art.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a local softening installation is assisted to electric current, the not accurate problem of the nail cover local heating region that can effectively solve self-plugging rivet.
The utility model aims at realizing like this, a local softening installation is assisted to electric current for carry out local softening to self-plugging rivet's nail cover, local softening installation is assisted to electric current includes:
the nail sleeve can be placed between the two groups of electric brush blocks, and the two groups of electric brush blocks can move oppositely to clamp the nail sleeve;
the positive electrode and the negative electrode of the direct current pulse power supply are respectively connected with the two groups of electric brush blocks through corresponding leads, and the direct current pulse power supply, the two groups of electric brush blocks and the nail sleeve can form a closed loop;
and the clamping device is connected with the two groups of electric brush blocks and can drive the two groups of electric brush blocks to move in opposite directions or to be far away.
The utility model discloses an in a preferred embodiment, every group brush piece all includes a plurality of brush pieces that stack in proper order along the symmetry axis direction of two sets of brush pieces, can adjust the gross thickness of every group brush piece through the total amount of adjustment brush piece and/or the thickness of each brush piece.
In a preferred embodiment of the present invention, the two sets of brush blocks are provided with arc-shaped grooves on their sides, and the corresponding side walls of the nail cover can be attached to the wall of the arc-shaped grooves.
In a preferred embodiment of the present invention, the brush block is a copper brush.
In a preferred embodiment of the present invention, the clamping device comprises two sets of clamping assemblies symmetrically arranged, each set of clamping assembly comprises a base, a brush fixing slider, a driving rod and a driving mechanism, and the brush block can be fixed on the brush fixing slider; a driving guide rail is arranged on the base, and the electric brush fixing sliding block can be connected with the driving guide rail in a sliding manner; the driving mechanism is connected with the electric brush fixing slide block through the driving rod and can drive the electric brush fixing slide block to move.
In a preferred embodiment of the present invention, the brush fixing block has a mounting groove formed therein, and a part of the brush block can be inserted into the mounting groove and fastened by a jackscrew at a side of the brush fixing block.
In a preferred embodiment of the present invention, the maximum output power of the dc pulse power supply is not lower than 10kW, and the maximum output frequency of the dc pulse power supply is not lower than 1kHz.
The utility model discloses an in a preferred embodiment, the supplementary local softening installation of electric current still includes the arm, and the arm can be placed the nail cover of treating local softening between two sets of brush blocks.
The utility model discloses an among the preferred embodiment, the supplementary local softening installation of electric current still includes the water-cooling tank, and the arm can also accomplish the local back of softening at the nail cover and put into the water-cooling tank with the nail cover.
The utility model discloses an in a preferred embodiment, the supplementary local softening installation of electric current still includes inert gas atmosphere guard box, and clamping device, two sets of brush pieces, arm and water-cooling case are all established in inert gas atmosphere guard box.
From top, the utility model provides a local softening installation is connected to be a closed loop through the nail cover with direct current pulse power supply, brush piece and self plugging rivet, utilizes direct current pulse power supply to provide direct current pulse, realizes the local heating to the circular telegram region of nail cover through the joule fuel factor, and then realizes that the local of nail cover is softened, and not only rate of heating is fast, and heating efficiency is high, has realized contact heating mode moreover, and heating region position is more accurate, and the repetition accuracy is high.
Drawings
The drawings are only intended to illustrate and explain the present invention and do not limit the scope of the invention. Wherein:
FIG. 1: do the utility model provides a current assists local softening installation's schematic structure diagram.
FIG. 2: does the utility model provides a wherein a set of centre gripping subassembly's among the clamping device structural schematic.
The reference numbers illustrate:
1. a direct current pulse power supply;
2. a clamping device; 21. a base; 211. a drive rail; 22. the electric brush fixes the slide block; 221. carrying out top thread; 23. a drive rod;
3. an electric brush block; 31. an electric brush sheet; 32. an arc-shaped slot; 33. a bolt;
4. a mechanical arm;
5. a water cooling tank;
6. an inert gas atmosphere protection box;
7. and (4) a nail sleeve.
Detailed Description
In order to clearly understand the technical features, objects and effects of the present invention, the embodiments of the present invention will be described with reference to the accompanying drawings.
As shown in fig. 1 and 2, the present embodiment provides a current-assisted local softening device for locally softening a jacket 7 of a blind rivet, the current-assisted local softening device including:
the nail sleeve 7 can be placed between the two groups of electric brush blocks 3, and the two groups of electric brush blocks 3 can move oppositely to clamp the nail sleeve 7;
the positive pole and the negative pole of the direct current pulse power supply 1 are respectively connected with the two groups of electric brush blocks 3 through corresponding leads, and the direct current pulse power supply 1, the two groups of electric brush blocks 3 and the nail sleeve 7 can form a closed loop;
and the clamping device 2 is connected with the two groups of electric brush blocks 3 and can drive the two groups of electric brush blocks 3 to move towards or away from each other.
Wherein, the interval between two sets of brush pieces 3 can be adjusted to conveniently to 7 centre grippings of nail cover or conveniently take out nail cover 7, need just to two sets of brush pieces 3 with the area of treating of nail cover 7 of treating softening when placing nail cover 7. The local softening device of the embodiment can be suitable for any nail sleeve 7 (such as a nail sleeve 7 made of a titanium alloy material) made of a metal material needing local softening, so that when the nail sleeve 7 is used, the nail sleeve 7, the electric brush block 3, the direct-current pulse power supply 1 and a corresponding lead form a closed loop to generate joule heat, a pulse current output by the direct-current pulse power supply 1 is utilized to locally heat a to-be-softened area of the nail sleeve 7, and the nail sleeve 7 can be locally softened.
From this, local softening installation in this embodiment connects into a closed loop through the nail cover 7 with DC pulse power supply 1, brush piece 3 and self-plugging rivet, utilizes DC pulse power supply 1 to provide direct current pulse, realizes the local heating to the circular telegram region of nail cover 7 through the joule heat effect, and then realizes the local softening of nail cover 7, and not only rate of heating is fast, and heating efficiency is high, has realized the contact heating mode moreover, and heating region position is more accurate, and the repetition precision is high.
Further preferably, each set of brush blocks 3 includes a plurality of brush segments 31 stacked in sequence along the direction of the symmetry axis of the two sets of brush blocks 3, and the total thickness of each set of brush blocks 3 can be adjusted by adjusting the total number of brush segments 31 and/or the thickness of each brush segment 31.
The thickness direction of each brush piece 31 is parallel to the symmetry axis direction of the two groups of brush blocks 3, the thickness of each brush piece 31 can be the same or different, and the total number of the brush pieces 31 can be changed and/or the thickness of the single brush piece 31 can be adjusted when the electric brush is used. Through the brush piece 31 of the different quantity of combination and/or the brush piece 31 of different thickness, adjust the gross thickness of brush piece 3, can reach the purpose of adjusting the heating region width of nail cover 7 to can realize the quick adjustment of heating width, and simple and convenient, it is accurate to adjust, and then can match the demand of the local softening range of different nail covers 7 better.
The arc-shaped grooves 32 are formed in the side faces, facing each other, of the two groups of electric brush blocks 3 generally, the shape of each arc-shaped groove 32 is matched with the side wall of the nail sleeve 7 to be softened, and the corresponding side wall of the nail sleeve 7 can be attached to the wall of the arc-shaped groove 32, so that the electric brush blocks 3 can be in close contact with the side wall face of the area to be softened in the nail sleeve 7 better.
The material to brush piece 3 can be decided as required, and preferred adoption electric conductive property is better, and the relatively softer material of material is convenient for realize the flexible centre gripping to nail cover 7 to reduce the damage to nail cover 7 surface when doing benefit to brush piece 3 and the contact laminating of nail cover 7. For example, in the present embodiment, the brush block 3 is preferably a copper brush, and more preferably made of copper.
Further, in order to facilitate driving the two groups of brush blocks 3 to move, the clamping device 2 comprises two groups of clamping assemblies which are symmetrically arranged, each group of clamping assemblies comprises a base 21, a brush fixing sliding block 22, a driving rod 23 and a driving mechanism, and the brush blocks 3 can be fixedly arranged on the brush fixing sliding blocks 22; a driving guide rail 211 is arranged on the base 21, and the brush fixing slide block 22 can be connected with the driving guide rail 211 in a sliding manner; the driving mechanism is connected with the brush fixing slider 22 through a driving rod 23 and can drive the brush fixing slider 22 to move.
The two groups of clamping components are located at the outer sides of the two groups of brush blocks 3, the driving guide rail 211 can adopt any mode, for example, referring to fig. 2 in the embodiment, a T-shaped groove is arranged on the top surface of the base 21, the base 21 at two sides of the T-shaped groove forms the driving guide rail 211, and the brush fixing slide block 22 is embedded in the T-shaped groove and can slide in a reciprocating linear manner along the length direction of the T-shaped groove. The driving rod 23 is located in the T-shaped groove, the axial direction of the driving rod is parallel to the length direction of the T-shaped groove and perpendicular to the symmetry axis direction of the two groups of brush blocks 3, and the driving rod 23 is driven by the driving mechanism to move, so that the brush blocks 3 can be driven to move. The driving mechanism preferably adopts a high-precision servo motor or a precise hydraulic element, the clamping force of the two groups of electric brush blocks 3 on the nail sleeve 7 is accurately controlled through real-time detection of a force sensor, and the clamping force is relatively slowly loaded (for example, the force value is loaded linearly instead of instantly) so as to realize flexible clamping on the nail sleeve 7 and avoid surface damage of the nail sleeve 7 caused by too large clamping force for closing the two groups of electric brush blocks 3.
In order to fix the brush block 3, a mounting groove is formed in the brush fixing slide block 22, and a part of the brush block 3 can be inserted into the mounting groove and fastened to the side surface of the brush fixing slide block 22 by a jackscrew 221.
The mounting groove may be shaped, for example, as a T-shaped groove as shown in fig. 2, or may be shaped in other ways as needed. A mounting hole is formed in the side wall of the brush fixing slide block 22, and after the brush block 3 is inserted into the mounting hole, the jackscrew 221 penetrates into the mounting hole and is tightly pressed against the side surface of the brush block 3; the shape of the mounting groove is matched with that of the electric brush block 3 for positioning, and the jackscrew 221 is tightly propped, so that the electric brush block 3 can be fixed, and the electric brush block fixing device is simple and convenient. The plurality of brush segments 31 included in the brush block 3 may be fastened together by bolts 33.
Of course, the above-mentioned clamping device 2 may also be in other structural forms as long as it is convenient to drive the two brush blocks 3 to move, and this embodiment is only for example.
Further, the direct current pulse power supply 1 should adopt high power to ensure that the nail sleeve 7 can be heated to the required temperature, so as to realize rapid softening. The specific output power value is determined according to the requirement, and in the embodiment, the maximum output power is preferably not lower than 10kW, and generally the maximum output power is about 20 kW.
Because the pulse frequency and the pulse width are both process parameters to be referred to for the local softening of the nail sleeve 7, the higher the frequency is under the condition of the same pulse width, or the larger the pulse width is under the same frequency, the stronger the generated thermal effect is, and the specific adjustment is needed according to different products. For example, the maximum output frequency of the dc pulse power supply 1 in this embodiment is preferably not lower than 1kHz, so as to ensure the softening effect on the nail sleeve 7 in the whole softening process and ensure the performance of the nail sleeve 7.
Further, the current-assisted local softening device also comprises a mechanical arm 4, wherein the mechanical arm 4 can place a nail sleeve 7 to be locally softened between the two groups of brush blocks 3. Arm 4 can adopt any current structure, as long as conveniently snatch nail cover 7 and with it remove to the assigned position can, the utility model discloses not injecing this.
In order to facilitate the realization of rapid cooling after the nail sleeve 7 is locally heated, the current auxiliary local softening device further comprises a water cooling tank 5, and the mechanical arm 4 can also put the nail sleeve 7 into the water cooling tank 5 after the nail sleeve 7 is locally softened.
Further, the current-assisted local softening device further comprises an inert gas atmosphere protection box 6, and the clamping device 2, the two groups of electric brush blocks 3, the mechanical arm 4 and the water cooling box 5 are all arranged in the inert gas atmosphere protection box 6. The inert gas atmosphere protection box 6 is used for providing an inert gas atmosphere (Ar can be used as the inert gas for example) so that the nail sleeve 7 is not oxidized when being heated, and the surface quality of the nail sleeve 7 is ensured.
Further, the working process of the whole local softening device is as follows:
taking out the nail sleeve 7 to be locally softened from the feeding device by using the mechanical arm 4, and placing the nail sleeve 7 between the two groups of electric brush blocks 3; then the clamping device 2 starts to act to provide clamping force for the two groups of brush blocks 3 and ensure that no damage occurs on the surface of the nail sleeve 7, and a closed loop is formed at the moment; then the direct current pulse power supply 1 starts to output pulse current, the electrified part of the nail sleeve 7 is rapidly heated and heated through the joule heat effect so as to be softened, then the clamping device 2 is loosened, the mechanical arm 4 throws the nail sleeve 7 into the water cooling tank 5 for rapid cooling, the local softening process of the single nail sleeve 7 is finished, and the whole process is carried out in the inert gas atmosphere.
To sum up, in the local softening device in this embodiment, the high-power and high-frequency direct-current pulse power supply 1 is used to cooperate with the total thickness-adjustable electric brush block 3, and the joule heat effect is used to locally heat the nail sleeve 7, which has the advantages of high heating speed, accurate heating region, adjustable heating width (the heating width can be realized by adjusting the total thickness of the combined electric brush block 3), and high repetition precision; corresponding controllers can be arranged according to requirements, so that large-batch and automatic local softening of the nail sleeve 7 can be realized through automatic control, and technical guarantee can be provided for the batch production of high-end fasteners. The problem of current self-plugging rivet's nail cover 7 local annealing heating region not accurate, the heating region width is difficult for adjusting is effectively solved.
The above are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention. Any person skilled in the art should also realize that such equivalent changes and modifications can be made without departing from the spirit and principles of the present invention.
Claims (10)
1. A current-assisted local softening device for locally softening a sleeve of a blind rivet, comprising:
the nail sleeve can be placed between the two groups of electric brush blocks, and the two groups of electric brush blocks can move oppositely to clamp the nail sleeve;
the positive electrode and the negative electrode of the direct current pulse power supply are respectively connected with the two groups of electric brush blocks through corresponding leads, and the direct current pulse power supply, the two groups of electric brush blocks and the nail sleeve can form a closed loop;
and the clamping device is connected with the two groups of electric brush blocks and can drive the two groups of electric brush blocks to move towards or away from each other.
2. Current-assisted local softening installation according to claim 1,
every group the electric brush piece all includes along two sets of a plurality of electric brush pieces that stack in proper order in the symmetry axis direction of electric brush piece, through the adjustment the total quantity of electric brush piece and/or each the thickness of electric brush piece can be adjusted every group the gross thickness of electric brush piece.
3. Current-assisted local softening installation according to claim 1,
arc-shaped grooves are formed in the side faces, facing each other, of the two groups of electric brush blocks, and the corresponding side walls of the nail sleeve can be attached to the wall of each arc-shaped groove.
4. Current-assisted local softening installation according to claim 1,
the electric brush block is a copper electric brush.
5. Current-assisted local softening installation according to claim 1,
the clamping device comprises two groups of clamping components which are symmetrically arranged, each group of clamping components comprises a base, an electric brush fixing sliding block, a driving rod and a driving mechanism, and the electric brush block can be fixedly arranged on the electric brush fixing sliding block; the base is provided with a driving guide rail, and the electric brush fixing sliding block can be connected with the driving guide rail in a sliding manner; the driving mechanism is connected with the electric brush fixing sliding block through the driving rod and can drive the electric brush fixing sliding block to move.
6. Current-assisted local softening installation according to claim 5,
the electric brush fixing sliding block is internally provided with a mounting groove, and one part of the electric brush block can be inserted into the mounting groove and is fastened on the side surface of the electric brush fixing sliding block through jackscrews.
7. Current-assisted local softening installation according to claim 1,
the maximum output power of the direct current pulse power supply is not lower than 10kW, and the maximum output frequency of the direct current pulse power supply is not lower than 1kHz.
8. Current-assisted local softening device according to claim 1,
the current-assisted local softening device further comprises a mechanical arm, and the mechanical arm can place the nail sleeve to be locally softened between the two groups of electric brush blocks.
9. Current-assisted local softening device according to claim 8,
the current-assisted local softening device further comprises a water cooling box, and the mechanical arm can also put the nail sleeve into the water cooling box after the nail sleeve is locally softened.
10. Current-assisted local softening device according to claim 9,
the current-assisted local softening device further comprises an inert gas atmosphere protection box, and the clamping device is two sets of the electric brush blocks, the mechanical arm and the water cooling box are all arranged in the inert gas atmosphere protection box.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221791492.7U CN217781208U (en) | 2022-07-12 | 2022-07-12 | Current-assisted local softening device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221791492.7U CN217781208U (en) | 2022-07-12 | 2022-07-12 | Current-assisted local softening device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217781208U true CN217781208U (en) | 2022-11-11 |
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ID=83939261
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221791492.7U Active CN217781208U (en) | 2022-07-12 | 2022-07-12 | Current-assisted local softening device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217781208U (en) |
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2022
- 2022-07-12 CN CN202221791492.7U patent/CN217781208U/en active Active
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