CN111604409A - Method for processing variable cross-section automobile frame inner and outer longitudinal beam integrated piece - Google Patents
Method for processing variable cross-section automobile frame inner and outer longitudinal beam integrated piece Download PDFInfo
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- CN111604409A CN111604409A CN202010451939.5A CN202010451939A CN111604409A CN 111604409 A CN111604409 A CN 111604409A CN 202010451939 A CN202010451939 A CN 202010451939A CN 111604409 A CN111604409 A CN 111604409A
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- longitudinal beam
- beam sheet
- outer longitudinal
- sheet material
- sheet materials
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D28/00—Shaping by press-cutting; Perforating
- B21D28/24—Perforating, i.e. punching holes
- B21D28/26—Perforating, i.e. punching holes in sheets or flat parts
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/10—Die sets; Pillar guides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D43/00—Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
- B21D43/003—Positioning devices
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
The invention provides a method for processing an inner and outer longitudinal beam integrated piece of a variable cross-section automobile frame, which comprises the following steps: A. firstly, presetting various hole systems on an inner longitudinal beam sheet material and an outer longitudinal beam sheet material through plane numerical control punching; B. placing inner longitudinal beam sheet materials and outer longitudinal beam sheet materials with various hole systems according to the front and back sides, placing the inner longitudinal beam sheet materials on the outer longitudinal beam sheet materials, positioning through positioning reference holes by using bolts, and aligning all hole systems on the ventral surfaces of the inner longitudinal beam sheet materials and the outer longitudinal beam sheet materials; C. the inner longitudinal beam sheet material and the outer longitudinal beam sheet material are bonded and welded into an integral longitudinal beam assembly through the plug welding holes formed in the inner longitudinal beam sheet material; D. and the die is adopted for stamping, and the positioning datum holes in the sheet stock of the longitudinal beam assembly are positioned by the positioning pins arranged on the die, so that double-material laminating stamping forming is realized. The invention cancels the original process sleeve drilling process, improves the frame manufacturing efficiency and solves the bottleneck of the sleeve drilling process by positioning the inner and outer longitudinal beam sheet materials by holes, overlapping plug welding and bonding and stamping by a double-material die.
Description
Technical Field
The invention relates to the technical field of assembly of automobile frames, in particular to a method for machining an inner and outer longitudinal beam integrated piece of a variable cross-section automobile frame.
Background
At present, for small and medium-sized automobile part and frame assembly processing enterprises, the production process and the processing process of the frame longitudinal beam play a role in determining the whole beat control.
The inventor discovers that in the process of implementing the invention:
in the existing frame longitudinal beam processing process, the frame longitudinal beam sleeve drilling production operation is to insert the formed inner and outer longitudinal beams firstly, arrange holes on the inner beam for plug welding to fasten the attaching surface of the inserted beam, and then manually drill holes by adopting a radial drilling machine, and use the outer longitudinal beam hole as a reference to realize the generation of holes for assembling the upper and lower wing surfaces and the ventral surface of the longitudinal beam; and then the longitudinal beam after drilling is transferred to the next procedure, the burr after drilling is comprehensively polished or the workpiece is turned to the opening part upwards, and then the reaming, chamfering and deburring processes are respectively carried out on the drilled hole. Because the cover drilling process operation is long in this course of working, directly influence solebar's takt and machining efficiency.
Disclosure of Invention
In order to solve the problems, the invention provides a method for processing an inner and outer longitudinal beam integrated piece of a variable cross-section automobile frame.
The invention changes the existing processing sequence of forming the inner longitudinal beam and the outer longitudinal beam → combining the beams → trepanning and drilling holes → reaming, chamfering and deburring respectively, and avoids the problems caused by the existing processing sequence.
Therefore, the technical scheme of the invention is as follows: the processing method of the variable cross-section automobile frame inner and outer longitudinal beam integrated piece comprises an inner longitudinal beam sheet material and an outer longitudinal beam sheet material, and is characterized by comprising the following specific processing steps:
A. firstly, presetting various hole systems on an inner longitudinal beam sheet material and an outer longitudinal beam sheet material through plane numerical control punching;
B. placing inner longitudinal beam sheet materials and outer longitudinal beam sheet materials with various hole systems on the front and back sides, placing the inner longitudinal beam sheet materials on the surface of the outer longitudinal beam sheet materials, and positioning the inner longitudinal beam sheet materials and the outer longitudinal beam sheet materials by using bolts through preset positioning reference holes, so that all hole systems on the ventral surfaces of the inner longitudinal beam sheet materials and the outer longitudinal beam sheet materials can be aligned;
C. the inner longitudinal beam sheet material and the outer longitudinal beam sheet material are bonded and welded into an integral longitudinal beam assembly through the plug welding holes formed in the inner longitudinal beam sheet material;
D. and D, stamping by adopting a die, and positioning the positioning datum holes in the sheet stock of the longitudinal beam assembly by positioning pins arranged on the die to realize double-material laminating stamping forming of the longitudinal beam assembly in the step C.
Preferably, the die stamping adopts a large-tonnage large-table-board press, and is provided with a corresponding die.
Preferably, the process size of the upper die of the die is determined by opening the inner beam, the process size of the lower die is determined by opening the outer beam, and the positioning pin is arranged at the bottom of the upper die; the upper die is also provided with a forming fillet, the radius of the forming fillet is smaller than the thickness of the inner longitudinal beam sheet, the stamping process can be ensured, and the binding surface of the stamping bending part of the inner longitudinal beam and the outer longitudinal beam meets the process requirement, so that the holes on the inner longitudinal beam and the outer longitudinal beam are kept in a corresponding state.
Has the advantages that: according to the invention, the sheet materials of the inner and outer longitudinal beams after hole lamination (plug welding bonding) → die forming (hole positioning and double material laminating) → sequence conversion (direct frame assembly) are realized, the trepanning drilling process in the original process is cancelled, the sheet materials of the inner and outer longitudinal beams are laminated and plug welded into an integral part through hole positioning, and then the double material die stamping forming is carried out, so that the frame manufacturing efficiency is improved, the bottleneck of the trepanning drilling process is solved, and the problems of long time and low work efficiency of workshop centralized operation due to the process are alleviated.
The comparative effects before and after improvement are as follows:
1. and (3) efficiency comparison: after improvement, trepanning and polishing are cancelled (40 single-shift productivity of 8 original drillers and 15 single-shift productivity of 1 original polisher), the overlapping work efficiency of beam combination and sheet stock is equal, and the efficiency is improved by 2.5 times;
2. quality comparison: the surface of a part is scratched due to the original beam combination, trepanning, multiple working procedures of grinding and multi-link circulation, and manual grinding and polishing treatment are carried out, so that the surface of a product has large-area grinding traces and poor appearance; the improved process method reduces the logistics of multi-link workpieces, cancels trepanning and reduces the damage of appearance quality caused by human factors;
3. and (3) environmental improvement: the prior multiple working procedures are centralized to cause the crowding of an operation field, the 5S management of the production field does not reach the standard, and the working procedures are dispersed or moved forward through process improvement to facilitate the reasonable allocation organization of production.
Drawings
FIG. 1 is a top view of the inner and outer stringer webs of the present invention during an up-down lay-up process.
Fig. 2 is a left side view of fig. 1.
Figure 3 is a schematic illustration of the inner and outer stringer sheets of the present invention superimposed and positioned by the latches.
FIG. 4 is a schematic view of the stringer assembly of the present invention.
Shown in the figure: 1. inner longitudinal beam sheet stock; 2. outer stringer sheet stock; 3. positioning a reference hole; 4. a bolt; 5. plugging the welding hole; 6. a stringer assembly; 7. a work table; 8. and (7) sleeper.
Detailed Description
The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings, but the embodiment should not be construed as limiting the present invention.
It should be noted that: the variable cross section in the inner and outer longitudinal beams of the variable cross section automobile frame is characterized in that the opening sizes of the cross sections of the front part, the middle part, the rear part and the like of the longitudinal beams are different.
The invention is shown in figures 1 to 4:
the invention relates to a processing method of an inner and outer longitudinal beam integrated piece of a variable cross-section automobile frame, which comprises an inner longitudinal beam sheet material and an outer longitudinal beam sheet material, and comprises the following specific processing steps:
A. presetting various hole systems on an inner longitudinal beam sheet material 1 and an outer longitudinal beam sheet material 2 through plane numerical control punching;
B. placing an inner longitudinal beam sheet material 1 and an outer longitudinal beam sheet material 2 with various hole systems on a workbench 7 which is staggered in height according to the front and back surfaces (a plurality of sheets can be placed at one time as shown in figure 2), sliding the inner longitudinal beam sheet material to the surface of the outer longitudinal beam sheet material and attaching the inner longitudinal beam sheet material to the surface, and positioning the inner longitudinal beam sheet material and the outer longitudinal beam sheet material by using bolts 4 through three preset positioning reference holes 3, so that all hole systems on the ventral surfaces of the inner longitudinal beam sheet material and the outer longitudinal beam sheet material can be aligned;
C. the inner longitudinal beam sheet material and the outer longitudinal beam sheet material are bonded and welded into an integral longitudinal beam assembly 6 through a plug welding hole 5 arranged on the inner longitudinal beam sheet material, and the longitudinal beam assembly is placed on a sleeper 8 for subsequent processing;
D. and D, stamping by adopting a die, and positioning the positioning datum holes in the sheet stock of the longitudinal beam assembly by positioning pins arranged on the die to realize double-material laminating stamping forming of the longitudinal beam assembly in the step C.
Wherein: the die stamping adopts a large-tonnage large-table-board press, the process size of an upper die of the die is determined by opening the inner beam, the process size of a lower die is determined by opening the outer beam, and a positioning pin is arranged at the bottom of the upper die; the upper die is also provided with a forming fillet, the radius of the forming fillet is smaller than the thickness of the inner longitudinal beam sheet, and the forming fillet is double-material laminating, so that the outer fillet of the whole formed workpiece is large if the forming fillet of the upper die is too large, and the forming quality of the workpiece close to the forming edge and the small edge distance hole is poor (the hole is torn or deformed and the like may occur).
The comparative effects before and after improvement are as follows:
1. and (3) efficiency comparison: after improvement, trepanning and polishing are cancelled (40 single-shift productivity of 8 original drillers and 15 single-shift productivity of 1 original polisher), the overlapping work efficiency of beam combination and sheet stock is equal, and the efficiency is improved by 2.5 times;
2. quality comparison: the surface of a part is scratched due to the original beam combination, trepanning, multiple working procedures of grinding and multi-link circulation, and manual grinding and polishing treatment are carried out, so that the surface of a product has large-area grinding traces and poor appearance; the improved process method reduces the logistics of multi-link workpieces, cancels trepanning and reduces the damage of appearance quality caused by human factors;
3. and (3) environmental improvement: the prior multiple working procedures are centralized to cause the crowding of an operation field, the 5S management of the production field does not reach the standard, and the working procedures are dispersed or moved forward through process improvement to facilitate the reasonable allocation organization of production.
Those skilled in the art will appreciate that the details of the present invention are not described in detail herein.
It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings and all such modifications and variations are intended to be included within the scope of the invention as defined in the appended claims.
Claims (3)
1. The processing method of the variable cross-section automobile frame inner and outer longitudinal beam integrated piece comprises an inner longitudinal beam sheet material and an outer longitudinal beam sheet material, and is characterized by comprising the following specific processing steps:
A. firstly, presetting various hole systems on an inner longitudinal beam sheet material and an outer longitudinal beam sheet material through plane numerical control punching;
B. placing inner longitudinal beam sheet materials and outer longitudinal beam sheet materials with various hole systems on the front and back sides, placing the inner longitudinal beam sheet materials on the surface of the outer longitudinal beam sheet materials, and positioning the inner longitudinal beam sheet materials and the outer longitudinal beam sheet materials by using bolts through preset positioning reference holes, so that all hole systems on the ventral surfaces of the inner longitudinal beam sheet materials and the outer longitudinal beam sheet materials can be aligned;
C. the inner longitudinal beam sheet material and the outer longitudinal beam sheet material are bonded and welded into an integral longitudinal beam assembly through the plug welding holes formed in the inner longitudinal beam sheet material;
D. and D, stamping by adopting a die, and positioning the positioning datum holes in the sheet stock of the longitudinal beam assembly by positioning pins arranged on the die to realize the laminating, stamping and forming of the longitudinal beam assembly in the step C.
2. The method for processing the variable cross-section automobile frame inner and outer longitudinal beam integrated piece according to claim 1, is characterized in that: the die stamping adopts a large-tonnage large-table-board press, and is provided with a corresponding die.
3. The method for processing the variable cross-section automobile frame inner and outer longitudinal beam integrated piece according to claim 2, is characterized in that: the technical size of the upper die of the die is determined by opening the inner beam, the technical size of the lower die is determined by opening the outer beam, and the positioning pin is arranged at the bottom of the upper die; the upper die is also provided with a forming fillet, and the radius of the forming fillet is smaller than the thickness of the inner longitudinal beam sheet material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010451939.5A CN111604409A (en) | 2020-05-26 | 2020-05-26 | Method for processing variable cross-section automobile frame inner and outer longitudinal beam integrated piece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010451939.5A CN111604409A (en) | 2020-05-26 | 2020-05-26 | Method for processing variable cross-section automobile frame inner and outer longitudinal beam integrated piece |
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| CN111604409A true CN111604409A (en) | 2020-09-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010451939.5A Pending CN111604409A (en) | 2020-05-26 | 2020-05-26 | Method for processing variable cross-section automobile frame inner and outer longitudinal beam integrated piece |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112338055A (en) * | 2020-10-12 | 2021-02-09 | 湖北华越汽车零部件有限公司 | Double-beam pressing process for automobile crossbeam |
| CN112475001A (en) * | 2020-11-26 | 2021-03-12 | 东风柳州汽车有限公司 | Plate punching die for carframe longitudinal beam |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000289816A (en) * | 1999-03-31 | 2000-10-17 | Toyota Autom Loom Works Ltd | Connecting structure for strut and beam material in framework shelf |
| CN201023529Y (en) * | 2007-02-08 | 2008-02-20 | 武汉枭龙常福汽车设计研究院 | Double-flute case-fastening welding type automobile frame carling |
| CN101850496A (en) * | 2010-05-25 | 2010-10-06 | 江苏友邦精工实业有限公司 | Manufacturing process of automotive chassis longitudinal beam |
| CN102166705A (en) * | 2011-03-23 | 2011-08-31 | 胡旭 | Method for forming multi-layer frame longitudinal beam and multi-layer frame longitudinal beam |
| CN102615483A (en) * | 2012-04-25 | 2012-08-01 | 江铃汽车股份有限公司 | Process for forming inner automobile longeron plate and outer automobile longeron plate at the same time |
| CN203974945U (en) * | 2014-07-15 | 2014-12-03 | 上海汇众汽车制造有限公司 | Fore sub frame |
| CN205165576U (en) * | 2015-11-26 | 2016-04-20 | 一汽凌源汽车车架制造有限公司 | Vehicle longeron forming die |
-
2020
- 2020-05-26 CN CN202010451939.5A patent/CN111604409A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000289816A (en) * | 1999-03-31 | 2000-10-17 | Toyota Autom Loom Works Ltd | Connecting structure for strut and beam material in framework shelf |
| CN201023529Y (en) * | 2007-02-08 | 2008-02-20 | 武汉枭龙常福汽车设计研究院 | Double-flute case-fastening welding type automobile frame carling |
| CN101850496A (en) * | 2010-05-25 | 2010-10-06 | 江苏友邦精工实业有限公司 | Manufacturing process of automotive chassis longitudinal beam |
| CN102166705A (en) * | 2011-03-23 | 2011-08-31 | 胡旭 | Method for forming multi-layer frame longitudinal beam and multi-layer frame longitudinal beam |
| CN102615483A (en) * | 2012-04-25 | 2012-08-01 | 江铃汽车股份有限公司 | Process for forming inner automobile longeron plate and outer automobile longeron plate at the same time |
| CN203974945U (en) * | 2014-07-15 | 2014-12-03 | 上海汇众汽车制造有限公司 | Fore sub frame |
| CN205165576U (en) * | 2015-11-26 | 2016-04-20 | 一汽凌源汽车车架制造有限公司 | Vehicle longeron forming die |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112338055A (en) * | 2020-10-12 | 2021-02-09 | 湖北华越汽车零部件有限公司 | Double-beam pressing process for automobile crossbeam |
| CN112475001A (en) * | 2020-11-26 | 2021-03-12 | 东风柳州汽车有限公司 | Plate punching die for carframe longitudinal beam |
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Application publication date: 20200901 |