CN115971698A - Split type lower tool rest of laser welding machine and machining method thereof - Google Patents
Split type lower tool rest of laser welding machine and machining method thereof Download PDFInfo
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- CN115971698A CN115971698A CN202211724880.8A CN202211724880A CN115971698A CN 115971698 A CN115971698 A CN 115971698A CN 202211724880 A CN202211724880 A CN 202211724880A CN 115971698 A CN115971698 A CN 115971698A
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Abstract
The invention relates to a split type lower tool rest of a laser welder and a processing method thereof, wherein the split type lower tool rest of the laser welder comprises the following components: the lower surface of the upper part comprises an upper plane positioned in the middle and two upper inclined planes positioned on two sides of the upper plane, the upper surface of the lower part comprises a lower plane positioned in the middle and two lower inclined planes positioned on two sides of the lower plane, and the connecting piece is detachably connected with the upper part and the lower part and is used for fixing the upper part and the lower part in a connecting state; when the upper part and the lower part are in a connected state, the two upper inclined planes and the two lower inclined planes are correspondingly attached, and a yielding gap is formed between the upper plane and the lower plane. Compared with the prior art, the split type lower tool rest of the laser welding machine provided by the invention adopts a split type structure, and utilizes the yielding gap formed between the upper part and the lower part to offset the downward shearing force and the lateral force, so that the outward bending effect of the lateral force on the upper part is weakened, and the service life of the lower tool rest is prolonged.
Description
Technical Field
The invention relates to the technical field of laser welding machines, in particular to a split type lower tool rest of a laser welding machine and a machining method thereof.
Background
The lower tool rest belongs to a part of lower shearing of a double-edge shearing device in a laser welding machine, the double-edge shearing device is used for shearing the tail part of one strip steel and the head part of the next strip steel on a unit together, the quality and the straightness of the shearing section of the head part and the tail part of the strip steel are ensured, and then preparation is made for subsequent strip steel splicing and laser welding. Therefore, the use effect of the lower tool rest directly influences the shearing precision of the double-edged shearing device in the laser welding machine.
The conventional double-edged shear device comprises an upper shear and a lower shear, wherein the upper shear comprises an upper tool rest 1A and two upper blades 2A, and the lower shear comprises a lower tool rest 3A and two lower blades 4A, as shown in figure 1. The upper tool rest 1A is driven by an external actuating element to move downwards, so that two outer side cutting edges of the upper blade 2A and two inner side cutting edges of the lower blade 4A are mutually occluded, and the purpose of simultaneously shearing the tail 5A of the previous strip steel and the head 6A of the next strip steel is achieved.
The force analysis of the existing lower tool rest 3A during the strip steel shearing is shown in fig. 2, and the lower blade 4A is subjected to a downward shearing force F1 and an outward lateral force F2 at the same time, and transmits the forces F1 and F2 to the lower tool rest 3A. The lower tool rest can be impacted by one-side shearing every time the strip steel is sheared. The lateral force F2 will cause the two side surfaces of the lower blade carrier 3A to gradually bend outward and deform, and after shearing for a certain number of times, the lower blade carrier 3A needs to be maintained, for example, by replacing the lower blade 4A, the gasket, and the like, to restore the shearing accuracy. However, this method is not a permanent cure, and as the bending degree of the lower tool rest 3A gradually increases, the lower tool rest 3A needs to be detached, the machine tool machining reference surface and the blade mounting surface need to be reused, and then the lower tool rest is mounted on a welding machine for fine adjustment, so as to recover the initial mounting accuracy of the lower tool rest. The process is not only complicated and extremely difficult, but also consumes a great deal of working hours.
Disclosure of Invention
In view of this, it is necessary to provide a split type lower tool rest of a laser welder and a processing method thereof, so as to solve the technical problem that the lower tool rest of the welder in the prior art is impacted by a lateral force when shearing strip steel, and is bent to both sides, which consumes the service life of the lower tool rest.
The invention provides a split type lower tool rest of a laser welding machine and a processing method thereof, and the split type lower tool rest of the laser welding machine comprises: the lower surface of the upper part comprises an upper plane positioned in the middle and two upper inclined planes positioned on two sides of the upper plane, the upper surface of the lower part comprises a lower plane positioned in the middle and two lower inclined planes positioned on two sides of the lower plane, and the connecting piece is detachably connected with the upper part and the lower part and is used for fixing the upper part and the lower part in a connecting state; when the upper part and the lower part are in a connected state, the two upper inclined planes and the two lower inclined planes are correspondingly attached, and a yielding gap is formed between the upper plane and the lower plane.
Furthermore, a plurality of first counter bores penetrating through the upper portion are formed in the upper portion, a plurality of screw holes are formed in the lower portion, when the upper portion and the lower portion are in a connected state, the first counter bores are communicated with the screw holes in a one-to-one correspondence mode, and the connecting piece is connected with the upper portion and the lower portion through the first counter bores and the screw holes.
Further, upper portion is formed with a plurality of second counter bores that run through upper portion, and the lower part is formed with a plurality of through-holes that run through the lower part, and when upper portion and lower part were in connected state, second counter bore and through-hole one-to-one intercommunication, the split type lower knife rest of laser welder still included the installed part, and the installed part passes through second counter bore and through-hole with upper portion and lower part integral erection on the laser welder.
Furthermore, the first counter bore and the second counter bore penetrate through the upper inclined plane, and the screw hole and the through hole penetrate through the lower inclined plane.
Further, the first counter bores are symmetrically arranged about the central axis of the upper portion, and the distance between two symmetrically arranged first counter bores is alternately different from a first distance and a second distance along the length direction of the upper portion.
Furthermore, two upper grooves extending along the length direction of the upper part are formed on the two sides of the first counter bore by the upper inclined plane.
Furthermore, two lower grooves extending along the length direction of the lower part are formed on two sides of the screw hole on the lower inclined plane.
Furthermore, the upper grooves correspond to the lower grooves one to one.
Furthermore, a processing groove is formed on the upper surface of the upper part along the length direction of the upper surface, and lower blade grooves for mounting lower blades are formed on two sides of a notch of the processing groove.
The processing method of the split type lower tool rest of the laser welding machine comprises the following steps: s1, producing upper and lower blank pieces; s2, finely machining an upper inclined surface and an upper plane of the upper part and finely machining a lower inclined surface and a lower plane of the lower part so that the upper inclined surface and the lower inclined surface can be correspondingly attached and a yielding gap can be formed between the upper plane and the lower plane; and S3, fixing the upper part and the lower part in a connected state by using the connecting piece, and processing other parts of the upper part and the lower part.
Compared with the prior art, the split type lower tool rest of the laser welding machine provided by the invention adopts a split type structure, and a yielding gap is formed between the upper part and the lower part, when strip steel is sheared, the downward shearing force F1 can enable the upper part to form an inward bending moment which is offset with an outward bending moment formed by the lateral force F2, the outward bending effect of the lateral force F2 on the upper part is weakened, the service life of the lower tool rest is prolonged, the maintenance frequency of the lower tool rest is reduced, and the working efficiency of the laser welding machine is improved;
the processing method of the split type lower tool rest of the laser welding machine provided by the invention has the advantages that the upper inclined plane, the lower inclined plane, the upper plane and the lower plane are firstly processed in a finish machining mode, the upper part and the lower part are assembled together, and then other parts of the upper part and the lower part are processed, so that the processing precision of the upper inclined plane, the lower inclined plane, the upper plane and the lower plane is ensured, and the shearing quality of a steel belt is further ensured.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood and to be implemented according to the content of the description, the following detailed description is given with reference to the accompanying drawings. The detailed description of the present invention is given in detail by the following examples and the accompanying drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
FIG. 1 is a schematic structural diagram of a double-edged shear device of a conventional laser welder;
FIG. 2 is a force analysis diagram of a lower tool rest of a conventional double-edged shearing device during shearing;
FIG. 3 is a schematic structural view of an embodiment of a split type lower tool holder of the laser welder provided by the invention;
FIG. 4 is a cross-sectional view of the upper portion of FIG. 1;
FIG. 5 is a cross-sectional view of the lower portion of FIG. 1;
FIG. 6 is a force analysis diagram of the lower tool rest of the double-edged shearing device provided by the invention during shearing;
FIG. 7 is a top view of the split lower tool post of the laser welder provided by the present invention;
FIG. 8 is a flow chart of the processing method of the split type lower tool rest of the laser welder provided by the invention.
Detailed Description
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate preferred embodiments of the invention and together with the description, serve to explain the principles of the invention and not to limit the scope of the invention.
Referring to fig. 3 to 5, the present invention provides a split type lower tool rest for a laser welder, which comprises an upper portion 1, a lower portion 2 and a connecting member (not shown), wherein the lower surface of the upper portion 1 comprises an upper plane 11 located in the middle and two upper inclined planes 12 located at two sides of the upper plane 11. The upper surface of the lower part 2 includes a lower plane 21 in the middle and two lower slopes 22 on both sides of the lower plane 21, and the connecting member is detachably connected to the upper part 1 and the lower part 2 to fix the upper part 1 and the lower part 2 in a connected state. When the upper part 1 and the lower part 2 are in a connected state, the two upper inclined surfaces 12 and the two lower inclined surfaces 22 are correspondingly attached, and a yielding gap is formed between the upper plane 11 and the lower plane 21.
Referring to fig. 6, the upper portion 1 is subjected to a downward shearing force F1 and a lateral force F2 when shearing a strip. Due to the clearance gap formed between the upper part 1 and the lower part 2, the downward shear force F1 will cause the upper part 1 to form an inwardly bending moment M1, which counteracts the outwardly bending moment M2 formed by the lateral force F2. The effect of lateral force F2 on outward bending of the upper portion 1 is weakened, the service life of the lower tool rest is prolonged, the maintenance frequency of the lower tool rest is reduced, and the working efficiency of the laser welding machine is improved.
In this embodiment, the upper portion 1 is formed with a plurality of first counter bores 13 penetrating through the upper portion 1, the lower portion 2 is formed with a plurality of screw holes 23, when the upper portion 1 and the lower portion 2 are in a connected state, the first counter bores 13 and the screw holes 23 are in one-to-one correspondence, and the connecting member connects the upper portion 1 and the lower portion 2 through the first counter bores 13 and the screw holes 23. The connector may be a suitable type of bolt that is capable of engaging the first counterbore 13 and the threaded bore 23.
The upper portion 1 is further provided with a plurality of second counter bores 14 penetrating through the upper portion 1, the lower portion 2 is provided with a plurality of through holes 24 penetrating through the lower portion 2, when the upper portion 1 and the lower portion 2 are in a connection state, the second counter bores 14 and the through holes 24 are communicated in a one-to-one correspondence mode, the split type lower tool rest of the laser welding machine further comprises a mounting piece (not shown), and the mounting piece integrally mounts the upper portion 1 and the lower portion 2 on the laser welding machine through the second counter bores 14 and the through holes 24. The mounting member may be a suitable type of bolt that is capable of engaging the second counterbore 14 and the through bore 24.
In the preferred embodiment, the first counterbore 13 and the second counterbore 14 are disposed through the upper chamfer 12, and the threaded bore 23 and the through bore 24 are disposed through the lower chamfer 22. Referring to fig. 7, the upper portion 1 and the lower portion 2 are both in a strip structure, the first counter bores 13 are symmetrically arranged on both sides of the upper portion about a central axis of the upper portion 1, and along a length direction of the upper portion, a distance between two symmetrically arranged first counter bores 13 is alternately a first distance L1 and a second distance L2 which are different. The design of making the first counter bore 13 of one side in a continuous W shape facilitates a more secure connection of the upper part 1 and the lower part 2, making it a solid whole.
In this embodiment, a machining groove 15 is further formed on the upper surface of the upper portion 1 along the length direction thereof, and lower insert grooves 16 for mounting lower inserts are formed on both sides of the notch of the machining groove 15.
In the preferred embodiment, upper ramp 12 is formed with two upper grooves 121 on either side of first counterbore 13 that extend along the length of upper portion 1. The method is used for reducing the attaching area between the upper inclined plane 12 and the lower inclined plane 22, thereby reducing the area of the upper inclined plane 12 needing to be finished and shortening the finishing time of the upper inclined plane 12.
Similarly, the lower inclined surface 22 is formed with two lower grooves 221 extending in the longitudinal direction of the lower portion 2 on both sides of the wire hole 23. The method is used for reducing the joint area between the lower inclined plane 22 and the upper inclined plane 12, thereby reducing the area of the lower inclined plane 22 needing to be subjected to finish machining and shortening the finish machining time of the lower inclined plane 22.
When the upper and lower inclined planes 12 and 22 have both the upper and lower grooves 121 and 221, the upper and lower grooves 121 and 221 need to correspond one to one, and have the same length and width.
Referring to fig. 8, the method for processing the split lower tool rest of the laser welder comprises the following steps: s1, producing upper and lower blank pieces. Specifically, a forging piece with a proper shape is adopted, and a blank piece is obtained through forging, normalizing, roughing, tempering and other processing means, and connecting structures such as counter bores, screw holes, through holes and the like are processed on the blank piece.
S2, finishing the upper plane 11 and the upper inclined plane 12 of the upper part 1, and finishing the lower plane 21 and the lower inclined plane 22 of the lower part 2, so that the upper inclined plane 12 and the lower inclined plane 22 can be correspondingly attached, and a yielding gap can be formed between the upper plane 11 and the lower plane 21. During specific processing, arc transition is adopted between the inclined plane and the plane, and the specific size of the inclined plane can be finely adjusted by adopting manual scraping. The upper bevel 12 and the lower bevel 22 serve as machining bases, the precision must be guaranteed, and the dimensions of the other surfaces are left with a certain margin to prepare for subsequent machining.
And S3, fixing the upper part 1 and the lower part 2 in a connected state by using a connecting piece, and reprocessing other parts of the upper part 1 and the lower part 2.
The invention also provides finite element stress analysis of the traditional integrated lower tool rest and the split lower tool rest. When the existing integrated lower tool rest is subjected to 80t of downward shearing force and 25t of lateral force on one side, the top of the existing integrated lower tool rest deforms by 0.0087mm outwards. And when the split type lower tool rest provided by the invention is subjected to 80t of downward shearing force and 25t of lateral force on one side, the top deforms by 0.0077mm outwards.
The models analyzed above are all consistent in overall dimension, and the difference is whether the lower tool rest is designed in an integrated mode or in a split mode. The analysis and comparison show that the deformation of the top of the split lower tool rest is smaller under the same stress condition, which indicates that the integral structure of the split lower tool rest is better than that of the traditional integrated lower tool rest. The structure of split type lower tool rest can shift traditional lower tool rest top large deformation volume region to split type lower tool rest middle part, reduces the deformation volume at split type lower tool rest top, has protected split type lower tool rest top the precision of blade installation face promptly, can prolong the life of lower tool rest greatly.
Compared with the prior art, the split type lower tool rest of the laser welding machine provided by the invention adopts a split type structure, and the upper part and the lower part form a yielding gap, when strip steel is sheared, the downward shearing force F1 can enable the upper part to form an inward bending moment, and the inward bending moment formed by the downward shearing force F1 and the outward bending moment formed by the lateral force F2 are offset, so that the effect of the lateral force F2 on the outward bending of the upper part is weakened, the service life of the lower tool rest is prolonged, the maintenance frequency of the lower tool rest is reduced, and the working efficiency of the laser welding machine is improved.
The processing method of the split type lower tool rest of the laser welder preferentially finishes the upper inclined plane, the lower inclined plane, the upper plane and the lower plane, processes other parts of the upper part and the lower part after assembling the upper part and the lower part together, ensures the processing precision of the upper inclined plane, the lower inclined plane, the upper plane and the lower plane, and further ensures the shearing quality of a steel strip.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention.
Claims (10)
1. The utility model provides a split type lower knife rest of laser welding machine which characterized in that, it includes: the lower surface of the upper part comprises an upper plane positioned in the middle and two upper inclined planes positioned on two sides of the upper plane, the upper surface of the lower part comprises a lower plane positioned in the middle and two lower inclined planes positioned on two sides of the lower plane, and the connecting piece is detachably connected with the upper part and the lower part and is used for fixing the upper part and the lower part in a connecting state; when the upper part and the lower part are in the connection state, the two upper inclined planes and the two lower inclined planes are correspondingly attached, and a yielding gap is formed between the upper plane and the lower plane.
2. The split lower tool rest of the laser welder as claimed in claim 1, wherein the upper portion is formed with a plurality of first counter bores penetrating the upper portion, the lower portion is formed with a plurality of screw holes, when the upper portion and the lower portion are in the connection state, the first counter bores and the screw holes are in one-to-one correspondence communication, and the connecting member connects the upper portion and the lower portion through the first counter bores and the screw holes.
3. The split type lower tool rest for the laser welder as claimed in claim 2, wherein the upper portion is formed with a plurality of second counter bores penetrating through the upper portion, the lower portion is formed with a plurality of through holes penetrating through the lower portion, when the upper portion and the lower portion are in the connection state, the second counter bores and the through holes are in one-to-one correspondence communication, the split type lower tool rest for the laser welder further comprises a mounting member, and the mounting member integrally mounts the upper portion and the lower portion on the laser welder through the second counter bores and the through holes.
4. The split lower tool rest of the laser welder according to claim 3, wherein the first counterbore and the second counterbore extend through the upper bevel, and the screw hole and the through hole extend through the lower bevel.
5. The split lower tool rest of the laser welder according to claim 4, wherein the first counter bores are symmetrically arranged about the central axis of the upper portion, and the distance between two symmetrically arranged first counter bores is alternately different from a first distance and a second distance along the length direction of the upper portion.
6. The split lower tool rest of the laser welder as claimed in claim 4, wherein the upper inclined plane is formed with two upper grooves extending along the length direction of the upper portion at both sides of the first counter bore.
7. The split lower tool holder of the laser welder as claimed in claim 6, wherein the lower inclined plane is formed with two lower grooves extending along the length direction of the lower portion at both sides of the screw hole.
8. The split lower tool holder of laser welder according to claim 7, wherein the upper grooves correspond to the lower grooves one to one.
9. The split type lower cutter frame of the laser welder according to claim 1, wherein the upper surface of the upper part is further formed with a processing groove along the length direction thereof, and lower blade grooves for mounting the lower blade are formed on both sides of the notch of the processing groove.
10. The method for processing the split type lower tool rest of the laser welder as claimed in any one of claims 1 to 9, characterized by comprising the following steps:
s1, producing blank pieces of the upper part and the lower part;
s2, finishing an upper inclined plane and an upper plane of the upper part, and finishing a lower inclined plane and a lower plane of the lower part, so that the upper inclined plane and the lower inclined plane can be correspondingly attached, and the yielding gap can be formed between the upper plane and the lower plane;
and S3, fixing the upper part and the lower part in the connection state by using a connecting piece, and reprocessing other parts of the upper part and the lower part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211724880.8A CN115971698A (en) | 2022-12-30 | 2022-12-30 | Split type lower tool rest of laser welding machine and machining method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211724880.8A CN115971698A (en) | 2022-12-30 | 2022-12-30 | Split type lower tool rest of laser welding machine and machining method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115971698A true CN115971698A (en) | 2023-04-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211724880.8A Pending CN115971698A (en) | 2022-12-30 | 2022-12-30 | Split type lower tool rest of laser welding machine and machining method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115971698A (en) |
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2022
- 2022-12-30 CN CN202211724880.8A patent/CN115971698A/en active Pending
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