CN114888084A - Variable-angle current loading device for electro-rolling composite plate and using method thereof - Google Patents
Variable-angle current loading device for electro-rolling composite plate and using method thereof Download PDFInfo
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- CN114888084A CN114888084A CN202210778080.8A CN202210778080A CN114888084A CN 114888084 A CN114888084 A CN 114888084A CN 202210778080 A CN202210778080 A CN 202210778080A CN 114888084 A CN114888084 A CN 114888084A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/38—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling sheets of limited length, e.g. folded sheets, superimposed sheets, pack rolling
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/004—Heating the product
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B47/00—Auxiliary arrangements, devices or methods in connection with rolling of multi-layer sheets of metal
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/38—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling sheets of limited length, e.g. folded sheets, superimposed sheets, pack rolling
- B21B2001/386—Plates
Abstract
The invention belongs to the technical field of current auxiliary rolling, in particular to a variable-angle current loading device for an electrorolling composite plate and a use method thereof, the variable-angle current loading device for the electrorolling composite plate comprises two first insulating plates, one ends of the two first insulating plates are hinged and connected through a hinge shaft, a current loading mechanism is respectively arranged on the outer end surface of each first insulating plate, each current loading mechanism comprises a guide base, the guide base is arranged on the first insulating plate, a guide end cover is arranged on the upper end surface of the guide base, the guide base and the guide end cover jointly form a guide cavity, a conductive plate is arranged in the guide cavity, the conductive plate is elastically connected with the guide end cover, the invention has simple and convenient structure and clear principle, and the design of the current loading mechanism ensures that the conductive plate and the plate are always kept in contact, the stability of the induced current in the electro-plastic rolling process is greatly enhanced.
Description
Technical Field
The invention belongs to the technical field of current-assisted rolling, and particularly relates to a variable-angle current loading device for an electrokinetic rolling composite plate and a using method thereof.
Background
The electro-plastic processing, namely the preparation of the composite plate is assisted by the Joule heat effect and the non-heat effect generated when current passes through metal, has obvious advantages in the aspects of improving the heating rate, reducing the manufacturing cost and forming load, improving the plasticity of the material and improving the surface quality and the structural state of the metal material, and particularly has application value in the aspect of double-layer composite metal materials which are difficult to be compounded.
At present, the mode of leading-in electric current in the rolling process of the electro-plastic property has through direction roll, direction platform, feeding clamp etc. and the current effect that different electric current contact modes led in the rolling plastic zone is different, wherein is comparatively common with feeding clamp's form, and this kind of device is usually with anchor clamps plane and panel contact, and area of contact is big, can leading-in electric current more effectively. When the device is applied to the preparation of double-layer composite boards, the common contact mode of the upper and lower boards at present is that the base board enters in parallel with the surface of the cover board, see patent No. CN11105474A, although the mode can also prepare the composite boards with certain performance, two problems can occur in the experimental process: firstly, the plate is easy to bend in the rolling process, so that the plane of the clamp and the plate cannot be always in good contact, and the forming stability is reduced; secondly, the substrate and the clad plate enter in parallel, so that the current distribution is realized on the whole contact surface, and the current cannot be concentrated in a rolling plastic contact area, thereby greatly reducing the effect of the current on the material.
Disclosure of Invention
The invention provides a variable-angle current loading device for an electro-rolling composite plate aiming at the problems. The method is mainly characterized in that the upper plate and the lower plate can be fed at a certain angle in the current-assisted rolling process, and the angle (10) within a certain range can be adjusted according to the plates with different thicknesses (1 mm-3 mm) o ~60 o ) Contact between the plate and the electrode is always ensured, and the 6061 Al/AZ31B Mg composite plate is successfully prepared by the device.
In order to achieve the purpose, the invention adopts the following technical scheme:
the variable-angle current loading device for the electro-rolling composite plate comprises two first insulating plates, one ends of the two first insulating plates are hinged through a hinge shaft, and a current loading mechanism is arranged on the end face of the outer side of each first insulating plate.
Further, the current loading mechanism comprises a guide base, the guide base is arranged on the first insulating plate, a guide end cover is arranged on the upper end face of the guide base, the guide base and the guide end cover jointly form a guide cavity, a conductive plate is arranged in the guide cavity, and the conductive plate is elastically connected with the guide end cover.
Still further, the conducting plate is connected with the guide end cover through a plurality of springs.
Furthermore, the current loading mechanism further comprises a plurality of guide rods, the lower ends of the guide rods are arranged on the current conducting plate, the upper ends of the guide rods penetrate through the guide end covers, and the first springs are sleeved on the guide rods.
Furthermore, the upper part of the guide rod is provided with a height adjusting structure for adjusting the length of the guide rod extending out of the guide end cover, and finally the purpose of adjusting the distance between the conductive plate and the guide base is achieved.
Furthermore, the height adjusting structure is an adjusting nut, the adjusting nut is located above the guide end cover, and the adjusting nut is in threaded connection with the guide rod.
Furthermore, two one side that the roll was kept away from to an insulation board all articulates there is the insulation board No. two, runs through on two insulation boards from top to bottom and is provided with a plurality of bolts No. two the cover is equipped with the spring No. two on the bolt No. two, and the spring is located between two insulation boards No. two from top to bottom, the head of bolt No. two and the nut of threaded connection above that are located the outside terminal surface of two insulation boards respectively, realize the adjustment of interval between two insulation boards No. two from top to bottom through the nut on the rotatory bolt No. two, and then drive the insulation board and remove, realize the adjustment of contained angle between two insulation boards.
Furthermore, the conducting plates and the corresponding first insulating plates are arranged in parallel, so that the plates are always parallel to the first insulating plates when being fed.
The use method of the variable-angle current loading device for the electro-rolling composite plate comprises the following steps:
a, installing, namely installing the hinge shaft between the racks on the left side and the right side of the rolling mill, wherein the hinge shaft is positioned on the inlet side of the rolling mill, and movably connecting an insulation plate I with the racks, specifically: a sliding groove is formed in the end face of the inlet side of the rack, a fastening sliding block is arranged in the sliding groove, and a fastening bolt penetrates through the first insulating plate to be in threaded connection with the fastening sliding block;
b, adjusting the distance between the two second insulating plates by adjusting the height of a nut on the second bolt, so as to realize the adjustment of the angle between the two first insulating plates, and then screwing the fastening bolt to realize the relative fixation of the first insulating plate and the rack;
and C, connecting the positive electrode and the negative electrode of the power supply with the upper conductive terminal and the lower conductive terminal respectively to realize the application of current, and then starting to roll the composite board.
Further, the included angle between the two insulation plates I is 10 o ~60 o 。
Compared with the prior art, the invention has the following advantages:
the invention has simple structure and clear principle, the design of the current loading mechanism ensures that the current conducting plate and the plate are always kept in contact, and the stability of the induced current in the electro-plastic rolling process is greatly enhanced; the plates enter the roller through a certain angle, so that the current is concentrated in a rolling plastic deformation area, the current action is more effectively utilized, and the uniformity of the composite plates on the length of the poker is further ensured; the connection mode of the two first insulation plates in a hinged mode ensures the reliability and the angle variability of feeding operation.
Drawings
FIG. 1 is a side view of the present invention;
FIG. 2 is a schematic structural diagram of a current loading mechanism according to the present invention;
FIG. 3 is a schematic view of the installation of the present invention;
FIG. 4 is a schematic view of the connection between the sliding slot, the fastening sliding block and the fastening bolt of the present invention;
FIG. 5 is a micro-topography of a composite plate interface;
FIG. 6 is a graph of tensile shear performance at the composite plate interface;
in the figure, a hinged shaft-1, an insulation plate-2, a frame-3, a current loading mechanism-4, a chute-5, a fastening slide block-6, a fastening bolt-7, an insulation plate-8, a bolt-9, a spring-10, a guide base-401, a guide end cover-402, a conductive plate-403, a spring-404, a guide rod-405 and a conductive terminal-406.
Detailed Description
In order to further illustrate the technical solution of the present invention, the present invention is further illustrated by the following examples.
As shown in fig. 1 to 4, the variable-angle current loading device for the electrorolling composite plate comprises two first insulating plates 2, one ends of the two first insulating plates 2 are hinged through a hinge shaft 1, a second insulating plate 8 is hinged on one side of each first insulating plate 2 away from a roller, a plurality of second bolts 9 are arranged on the upper and lower second insulating plates 8 in a penetrating manner, second springs 10 are sleeved on the second bolts 9, the second springs 10 are positioned between the upper and lower second insulating plates 8, the heads of the second bolts 9 and nuts screwed thereon are respectively positioned on the outer end faces of the two second insulating plates 8, the adjustment of the distance between the upper and lower second insulating plates 8 is realized by rotating the nuts on the second bolts 9, the first insulating plates 2 are driven to move, and the adjustment of the included angle between the two first insulating plates 2 is realized, and a current loading mechanism 4 is respectively arranged on the outer end face of each first insulating plate 2.
The current loading mechanism 4 comprises a guide base 401 and a plurality of guide rods 405, the guide base 401 is arranged on a first insulating plate 2, a guide end cover 402 is arranged on the upper end face of the guide base 401, the guide base 401 and the guide end cover 402 jointly form a guide cavity, a conductive plate 403 is arranged in the guide cavity, the conductive plate 403 is arranged in parallel with the corresponding first insulating plate 2 so as to ensure that a plate is always parallel to the first insulating plate 2 when being fed, the lower ends of the guide rods 405 are arranged on the conductive plate 403, the upper ends of the guide rods pass through the guide end cover 402, a first spring 404 is sleeved on the guide rods 405, the first spring 404 is positioned between the conductive plate 403 and the guide end cover 402, adjusting nuts are connected to the upper portions of the guide rods 405 through threads, the adjusting nuts are positioned above the guide end cover 402 and used for adjusting the length of the guide rods 405 extending out of the guide end cover 402, finally, the purpose of adjusting the distance between the conductive plate 403 and the guide base 401 is achieved.
The use method of the variable-angle current loading device for the electro-rolling composite plate comprises the following steps:
a, the installation, will articulated shaft 1 installs between the frame 3 of the rolling mill left and right sides, and articulated shaft 1 is located the rolling mill entrance side, with insulation board 2 and frame 3 swing joint, specifically do: a sliding groove 5 is arranged on the end surface of the inlet side of the rack 3, a fastening sliding block 6 is arranged in the sliding groove 5, and a fastening bolt 7 penetrates through the first insulating plate 2 to be in threaded connection with the fastening sliding block 6;
b, adjusting the height of a nut on the second bolt 9 to adjust the distance between the two second insulating plates 8, so that the angle between the two first insulating plates 2 can be adjusted, and the included angle between the two first insulating plates 2 is 10 o . Then, the first insulating plate 2 and the rack 3 are relatively fixed by screwing the fastening bolt 7;
and C, connecting the positive electrode and the negative electrode of the power supply with the upper conductive terminal 406 and the lower conductive terminal 406 respectively to realize the application of current, and then rolling the composite board.
In the above embodiment, the number of the guide rods 405 and the number one springs 404 is the same, and are even, and are distributed on the first insulating plate 2 in bilateral symmetry, the number of the second bolts 9 is even, and are distributed on the second insulating plate 8 in bilateral symmetry, and the included angle between the two first insulating plates 2 can also be 40 o Or 60 o 。
The device for preparing the aluminum-magnesium composite board specifically comprises the following steps:
step 1, adjusting an included angle between two first insulating plates 2 to be 30 degrees;
Electrifying parameters of the composite board: firstly, knowing the temperature to be heated according to an aluminum-magnesium binary phase diagram, and determining the parameter range of the high-frequency current as follows: the current is 300-600A, the frequency is 20-80 kHz, and the duty ratio is 50%. Because different materials have different parameters such as electrical conductivity, thermal conductivity, dielectric constant, magnetic conductivity and the like, the optimal parameters of current, frequency and duty ratio are obtained through calculation and quantitative analysis of a pre-experiment;
and (3) comparing experimental data: in FIG. 5, a and b are microscopic interface morphology diagrams of aluminum/magnesium composite plates prepared by pulse current assisted rolling, the composite plates enter the rollers in a parallel mode, and the angle between the plates is 0 o . The pulse current parameters are respectively as follows: under a group a test, the current is 300A, the loading frequency is 20 kHz, and the duty ratio is 50 percent; under the test of the group b, the current is 300A, the loading frequency is 40 kHz, and the duty ratio is 50%. The microscopic binding interfaces in both experiments were flat with diffusion layer thicknesses of 5. + -.2 μm, as shown in FIGS. 5-a, b. And the tensile strength and the shear strength of the two groups of samples are within 35 +/-5 MPa in macroscopic view, and the difference is not great, as shown in figure 6. This shows that when the plate is parallel electrified and rolled, the pulse current parameters do not affect the microscopic interface morphology and strength of the composite plate, and at the moment, the current only has the joule heating effect.
In FIG. 5, c and d are micro-interface morphology diagrams of the aluminum/magnesium composite plate prepared by the pulse current auxiliary rolling, and the composite plate enters the roller in a mode of a certain angle, and the plateThe angle between the timber is 15 o . The pulse current parameters are respectively as follows: under the test of the group c, the current is 300A, the loading frequency is 20 kHz, and the duty ratio is 50 percent; under the test of the group d, the current is 300A, the loading frequency is 40 kHz, and the duty ratio is 50%. The microscopic interface of the samples of group c appeared substantially flat with a diffusion layer thickness of 8. + -. 2 μm, as shown in FIG. 5-c. The microscopic interface of the samples of group d was substantially corrugated with a diffusion layer thickness of 15. + -.2 μm, as shown in FIG. 5-d. And the tensile shear strength of the c group of samples is 48 +/-5 MPa and the tensile shear strength of the d group of samples is 73 +/-5 MPa macroscopically, and compared with the samples obtained at 20 kHz, the tensile shear strength of the composite plate obtained at 40 kHz is improved by about 50 percent, as shown in FIG. 6. This shows that when the plate is electrified and rolled at a certain angle, the pulse current parameters not only affect the microscopic interface morphology of the composite plate but also improve the interface strength, and 15 g at the same frequency o Angular energization rolling ratio of 0 o When the angle is electrified and rolled, the tensile shear strength of the interface is improved by 50 percent.
While there have been shown and described what are at present considered to be the essential features and advantages of the invention, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing exemplary embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (10)
1. A variable angle current loading device for electrofolling composite plates is characterized in that: the insulating plate comprises two first insulating plates (2), one ends of the two first insulating plates (2) are hinged through hinge shafts (1), and a current loading mechanism (4) is arranged on the end face of the outer side of each first insulating plate (2).
2. The variable angle current application device for electrolessly rolling composite panels according to claim 1, wherein: the current loading mechanism (4) comprises a guide base (401), the guide base (401) is arranged on a first insulating plate (2), a guide end cover (402) is arranged on the upper end face of the guide base (401), the guide base (401) and the guide end cover (402) jointly form a guide cavity, a conductive plate (403) is arranged in the guide cavity, and the conductive plate (403) is elastically connected with the guide end cover (402).
3. The variable angle current application device for electrolessly rolling composite panels according to claim 2, wherein: the conductive plate (403) is connected with the guide end cover (402) through a plurality of first springs (404).
4. The variable angle current application device for electrolessly rolling composite panels according to claim 3, wherein: the current loading mechanism (4) further comprises a plurality of guide rods (405), the lower ends of the guide rods (405) are arranged on the conductive plate (403), the upper ends of the guide rods (405) penetrate through the guide end covers (402), and the first springs (404) are sleeved on the guide rods (405).
5. The variable angle current application device for electrolessly rolling composite panels according to claim 4, wherein: and a height adjusting structure is arranged at the upper part of the guide rod (405) and used for adjusting the length of the guide rod (405) extending out of the guide end cover (402), and finally the purpose of adjusting the distance between the conductive plate (403) and the guide base (401) is achieved.
6. The variable angle current application device for electrolessly rolling composite panels according to claim 5, wherein: the height adjusting structure is an adjusting nut, the adjusting nut is located above the guide end cover (402), and the adjusting nut is in threaded connection with the guide rod (405).
7. The variable angle current application device for electrolessly rolling composite panels according to claim 6, wherein: two one side that the roll was kept away from in insulation board (2) all articulates there is insulation board (8) No. two, runs through on two insulation boards (8) from top to bottom and is provided with a plurality of bolts No. two (9) No. two bolts (9) go up the cover and are equipped with spring (10) No. two, and spring (10) No. two are located between two insulation board (8) from top to bottom, the head of bolt (9) and the nut of threaded connection on it are located the outside terminal surface of two insulation boards (8) respectively, realize the adjustment of interval between two insulation boards No. two (8) from top to bottom through the nut on the rotatory bolt (9) No. two, and then drive insulation board (2) and remove, realize the adjustment of contained angle between two insulation boards (2).
8. The variable angle current application device for electrolessly rolling composite panels according to claim 7, wherein: the conducting plate (403) and the corresponding first insulating plate (2) are arranged in parallel, so that the plates are always parallel to the first insulating plate (2) when being fed.
9. The method of using a variable angle current application device for electrolessly rolling composite panels according to claim 7, wherein: the method comprises the following steps:
a, mounting, namely mounting the hinge shaft (1) between the racks (3) at the left side and the right side of the rolling mill, positioning the hinge shaft (1) at the inlet side of the rolling mill, and movably connecting a first insulating plate (2) with the racks (3), specifically: a sliding groove (5) is formed in the end face of the inlet side of the rack (3), a fastening sliding block (6) is arranged in the sliding groove (5), and a fastening bolt (7) penetrates through the first insulating plate (2) to be in threaded connection with the fastening sliding block (6);
b, adjusting the height of a nut on the second bolt (9) and the distance between the two second insulating plates (8) so as to adjust the angle between the two first insulating plates (2), and then screwing the fastening bolt (7) to relatively fix the first insulating plates (2) and the rack (3);
and C, connecting the positive electrode and the negative electrode of the power supply with the upper conductive terminal (406) and the lower conductive terminal (406) respectively to realize the application of current, and then rolling the composite board.
10. The method of using a variable angle current application device for electrolessly rolling composite panels according to claim 9, wherein: the included angle between the two first insulating plates (2) is 10 o ~60 o 。
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