CN111085829A - Production method of auxiliary frame - Google Patents
Production method of auxiliary frame Download PDFInfo
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- CN111085829A CN111085829A CN201911405329.5A CN201911405329A CN111085829A CN 111085829 A CN111085829 A CN 111085829A CN 201911405329 A CN201911405329 A CN 201911405329A CN 111085829 A CN111085829 A CN 111085829A
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- casting
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- positioning table
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- subframe
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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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D21/00—Understructures, i.e. chassis frame on which a vehicle body may be mounted
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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
- B23P2700/00—Indexing scheme relating to the articles being treated, e.g. manufactured, repaired, assembled, connected or other operations covered in the subgroups
- B23P2700/50—Other automobile vehicle parts, i.e. manufactured in assembly lines
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Body Structure For Vehicles (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
The invention provides a production method of an auxiliary frame, which solves the transmission and conversion of positioning reference and effectively reduces the influence of welding deformation on a workpiece by reasonably setting a casting positioning table.
Description
Technical Field
The invention relates to the technical field of manufacturing of auxiliary frames, in particular to a light auxiliary frame production method.
Background
With the development of light weight of automobiles, most automobile parts are made of aluminum materials instead of steel materials, a subframe is one of important parts on an automobile, a traditional subframe is generally formed by stamping and welding steel plates and has a large weight, and nowadays, a subframe formed by welding and mixing section castings is more popular in the market, the section casting mixed subframe mainly comprises a left casting, a right casting, a front section and a rear section, and connecting parts are connected through a welding process, wherein A1, A2, A3 and A4 are installation surface references of the subframe, B holes and C holes are installation hole references, E holes and F holes are other two automobile body installation holes, and the subframe is connected with an automobile body through four installation holes in total. The patent provides a production method of a section casting mixed type auxiliary frame.
Disclosure of Invention
The invention aims to provide a production method of a profile casting hybrid auxiliary frame, and provides a detailed production process, and the profile casting tailor-welded auxiliary frame can be obtained through the method.
In order to achieve the purpose, the production method of the section casting hybrid auxiliary frame comprises the following steps:
and (I), casting a left casting and a right casting. When a left casting is cast, the front surface of the left casting is provided with a front positioning table, the diameter of the front positioning table is 10mm, the height of the front positioning table is 3mm, the horizontal distance from the front positioning table to a weld crater is 10-12mm, when a right casting is cast, the back surface of the right casting is provided with a back positioning table, the diameter of the back positioning table is 10mm, the height of the back positioning table is 3mm, and the horizontal distance from the back positioning table to the weld crater is 10-12.
And (II) pre-machining the left casting and the right casting. The left casting and the right casting are pre-machined, positioning surfaces A1, A2, A3, A4, a1, a2, A3 and a4, positioning holes B, C, E, F and welding openings are machined, a vehicle body mounting hole B, E and upper and lower surfaces A1, a1, A3 and A3 are machined in the left casting, compared with a finished product, machining allowance of 2mm is set on one side of the diameters of holes B and E, and machining allowance of 2mm is set on each of the upper and lower surfaces A1, a1, A3 and A3 of the holes B and E. And the front positioning table is not machined during machining in advance, and a casting surface is reserved. A vehicle body mounting hole C, F and upper and lower surfaces A2, a2, A4 and a4 are machined in the right casting, compared with a finished product, machining allowance of 2mm is set on one side of the diameters of C and F holes, and machining allowance of 2mm is set on the upper and lower surfaces A2, a2, A4 and a4 of the C and F holes respectively. And milling a plane on the back positioning table during pre-machining.
(III) pre-machining the front section and the rear section. And processing the front section and the rear section into welded junctions, cleaning, removing impurities such as oil stains and the like, and welding for later use.
And (IV) assembling and welding. The left casting, the right casting, the front section and the rear section are assembled on a welding fixture, the left casting is subjected to surface positioning through a1 hole and a3 hole and is subjected to angular positioning through a hole B and a hole E, the right casting is subjected to surface positioning through a2 hole and a4 hole and is subjected to angular positioning through a hole C and a hole F. And after the assembly is finished, welding the welding line through the welding displacement tool and the welding robot.
And (V) machining after welding. The method is characterized in that a five-axis machining center is adopted for two-step machining, the first-step machining milling is carried out to carry out surface positioning by using an E hole lower surface A3, an F hole lower surface a4 and a back positioning table, angular positioning is carried out by using the E hole and the F hole, a one-surface two-pin positioning mode is formed, and the first-step machining milling is carried out to machine the characteristics of the auxiliary frame, such as a reference A1 surface, an a1 surface, an A2 surface, an a2 surface, a hole B, a hole C, a front positioning table and a front surface, which can be. And performing surface positioning by using a hole B upper surface A1 surface, a hole C upper surface A2 surface and a front positioning table and performing angular positioning by using a hole B and a hole C to form a one-surface two-pin positioning mode, and performing machining by using a second-step milling to machine the characteristics of the subframe, such as A3 surface, A3 surface, A4 surface, a4 surface, E holes, F holes and the back surface.
And (VI), deburring and cleaning. Deburring each machined part, and cleaning impurities such as residual emulsion, aluminum scraps and the like.
And (VII) pressing and assembling the bushing in the vehicle body mounting hole.
The invention has the advantages that: (1) the reserved positioning point position of the casting is given, and a machining scheme is performed before welding, so that high-precision positioning of welding is realized, welding deformation is reduced, and welding quality is improved; (2) reasonable process allowance and positioning reference conversion are adopted, so that the manufacturing cost is greatly reduced while the accuracy is ensured by post-welding machining. (3) The method obtains practical inspection and demonstration, and solves the problems of serious deformation and low precision of the tailor-welded auxiliary frame.
The invention provides a production method and key parameters of a sectional material casting tailor-welded auxiliary frame, solves the transmission and conversion of positioning reference and effectively reduces the influence of welding deformation on a workpiece by reasonably setting a casting positioning table, can obtain a high-precision high-quality lightweight sectional material and a casting tailor-welded auxiliary frame, has been demonstrated in actual production, successfully manufactures the high-precision auxiliary frame, and is a correct and effective technological method.
Drawings
FIG. 1 is a schematic front view of a section cast hybrid subframe production method of the present invention.
FIG. 2 is a schematic view of the back side of the subframe of the method for producing a section casting hybrid subframe of the present invention.
In the figure, 1-left casting, 2-right casting, 3-front section, 4-rear section, 5-welding seam, 6-back positioning table and 7-front positioning table.
Detailed Description
The invention will now be described in more detail with reference to the following description and examples, taken in conjunction with the accompanying drawings.
The section casting hybrid auxiliary frame mainly comprises a left casting 1, a right casting 2, a front section 3 and a rear section 4, and connecting parts are connected through a welding process, wherein A1, A2, A3 and A4 are installation surface references of the auxiliary frame, holes B and C are installation hole references, holes E and F are other two vehicle body installation holes, and the auxiliary frame is connected with a vehicle body through four installation holes in total.
The invention relates to a production method of a profile casting mixed type auxiliary frame, which comprises the following steps:
and (I), casting a left casting and a right casting. A front positioning table 7 is reserved on the front side of the left casting 1 during casting, the diameter of the front positioning table is 10mm, the height of the front positioning table is 3mm, the horizontal distance from the front positioning table 7 to a weld crater is 10-12mm, a back positioning table 6 is reserved on the back side of the right casting 2 during casting, the diameter of the back positioning table is 10mm, the height of the back positioning table is 3mm, and the horizontal distance from the back positioning table 6 to the weld crater is 10-12 mm.
And (II) pre-machining the left casting and the right casting. The method comprises the steps of performing pre-machining on a left casting 1 and a right casting 2, and machining positioning surfaces A1, A2, A3, A4, a1, a2, A3 and a4, positioning holes B, C, E, F and welding openings, wherein a vehicle body mounting hole B, E and upper and lower surfaces A1, a1, A3 and A3 are machined in the left casting 1, compared with a finished product, 2mm machining allowance is set on one side of diameters of holes B and E, and 2mm machining allowance is set on the upper and lower surfaces A1, a1, A3 and A3 of the holes B and E. When the pre-machining is performed, the front positioning table 7 is not machined, and a casting surface is reserved. A vehicle body mounting hole C, F and upper and lower surfaces A2, a2, A4 and a4 are machined in the right casting 2, compared with a finished product, machining allowance of 2mm is set for one side of the diameter of a hole C and the diameter of a hole F, and machining allowance of 2mm is set for the upper and lower surfaces A2, a2, A4 and a4 of the hole C and the hole F respectively. When in pre-machining, the back positioning table 6 is milled to be a plane.
(III) pre-machining the front section and the rear section. And processing the front section bar 3 and the rear section bar 4 into welded junctions, cleaning, removing impurities such as oil stains and the like, and welding for later use.
And (IV) assembling and welding. Assembling the left casting 1, the right casting 2, the front section bar 3 and the rear section bar 4 on a welding fixture, performing surface positioning on the left casting 1 through a1 and a3, performing angular positioning through a hole B and a hole E, performing surface positioning on the right casting 2 through a2 and a4, and performing angular positioning through a hole C and a hole F. And after the assembly is finished, welding the welding line through the welding displacement tool and the welding robot.
And (V) machining after welding. The method is characterized in that a five-axis machining center is adopted for two-step machining, the first-step machining milling is carried out to carry out surface positioning on the lower surface A3 of an E hole, the lower surface a4 of an F hole and the back positioning table 6, the E hole and the F hole are used for angular positioning, a one-surface two-pin positioning mode is formed, and the first-step machining milling is carried out to machine the characteristics of the reference A1 surface, the a1 surface, the A2 surface, the a2 surface, the B hole, the C hole, the front positioning table 7 and the front surface of the auxiliary frame, which can be machined. And performing two-step machining milling to perform surface positioning by using a hole B upper surface A1 surface, a hole C upper surface A2 surface and a front positioning table 7, performing angular positioning by using a hole B and a hole C to form a one-surface two-pin positioning mode, and performing two-step machining milling to process the characteristics that the A3 surface, the A3 surface, the A4 surface, the a4 surface, the hole E, the hole F and the back surface of the subframe can be processed.
And (VI), deburring and cleaning. Deburring each machined part, and cleaning impurities such as residual emulsion, aluminum scraps and the like.
And (VII) pressing and assembling the bushing in the vehicle body mounting hole.
The invention has the advantages that: (1) the reserved positioning point position of the casting is given, and a machining scheme is performed before welding, so that high-precision positioning of welding is realized, welding deformation is reduced, and welding quality is improved; (2) reasonable process allowance and positioning reference conversion are adopted, so that the manufacturing cost is greatly reduced while the accuracy is ensured by post-welding machining. (3) The method obtains practical inspection and demonstration, and solves the problems of serious deformation and low precision of the tailor-welded auxiliary frame.
The invention provides a production method and key parameters of a sectional material casting tailor-welded auxiliary frame, solves the transmission and conversion of positioning reference and effectively reduces the influence of welding deformation on a workpiece by reasonably setting a casting positioning table, can obtain a high-precision high-quality lightweight sectional material and a casting tailor-welded auxiliary frame, has been demonstrated in actual production, successfully manufactures the high-precision auxiliary frame, and is a correct and effective technological method.
Claims (8)
1. A method for producing a subframe, said method comprising the steps of: casting a left casting and a right casting; (II) pre-machining a left casting and a right casting; (III) pre-machining a front section and a rear section; (IV) assembling and welding; (V) post-weld machining; (VI) deburring and cleaning; and (VII) press-fitting the bushing in the vehicle body mounting hole.
2. The subframe production method according to claim 1, wherein in step (I), a front positioning table (7) is reserved on the front surface of the left casting (1) during casting, and a back positioning table (6) is reserved on the back surface of the right casting (2) during casting.
3. The subframe production method as claimed in claim 2, wherein the front positioning table (7) has a diameter of 10mm and a height of 3mm, and the front positioning table (7) is horizontally spaced from the craters by 10-12 mm.
4. The method for producing a subframe according to claim 2, wherein the diameter of the back positioning table (6) is 10mm, the height thereof is 3mm, and the horizontal distance from the back positioning table (6) to the crater is 10-12 mm.
5. The subframe producing method as claimed in claim 1, wherein in the step (ii), the left casting (1) and the right casting (2) are pre-machined to form positioning surfaces a1, a2, A3, a4, a1, a2, A3, a4, positioning holes B, C, E, F, and welding openings.
6. The subframe production method of claim 5, wherein the left casting (1) is provided with a vehicle body mounting hole B, E and upper and lower surfaces A1, a1, A3 and A3, compared with a finished product, the diameter of a hole B and a hole E is provided with a machining allowance of 2mm on one side, and the upper and lower surfaces A1, a1, A3 and A3 of the hole B and the hole E are provided with a machining allowance of 2mm respectively; when the pre-machining is performed, the front positioning table (7) is not machined, and the casting surface is reserved.
7. The subframe production method of claim 5, wherein the right casting (2) is provided with a body mounting hole C, F and upper and lower surfaces A2, a2, A4 and a4, compared with a finished product, the diameters of C and F holes are unilateral to leave 2mm machining allowance, and the upper and lower surfaces A2, a2, A4 and a4 of the C and F holes respectively leave 2mm machining allowance; when in pre-machining, the back positioning table (6) is milled to form a plane.
8. The method for manufacturing a subframe according to claim 1, wherein in the step (v), the OP10 processes the datum a1 surface, a1 surface, a2 surface, a2 surface, B holes, C holes, and the front positioning table (7) of the subframe; the OP20 machined the subframe had A3, A3, a4, a4, E and F holes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911405329.5A CN111085829A (en) | 2019-12-31 | 2019-12-31 | Production method of auxiliary frame |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911405329.5A CN111085829A (en) | 2019-12-31 | 2019-12-31 | Production method of auxiliary frame |
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| Publication Number | Publication Date |
|---|---|
| CN111085829A true CN111085829A (en) | 2020-05-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911405329.5A Pending CN111085829A (en) | 2019-12-31 | 2019-12-31 | Production method of auxiliary frame |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113878314A (en) * | 2021-11-03 | 2022-01-04 | 安徽明豪汽车科技有限公司 | Automatic production process for welding reinforcing plate auxiliary frame assembly based on intelligent positioning |
| CN114800056A (en) * | 2022-04-30 | 2022-07-29 | 徐德富 | Method for machining and mounting high-form-position precision part |
-
2019
- 2019-12-31 CN CN201911405329.5A patent/CN111085829A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113878314A (en) * | 2021-11-03 | 2022-01-04 | 安徽明豪汽车科技有限公司 | Automatic production process for welding reinforcing plate auxiliary frame assembly based on intelligent positioning |
| CN114800056A (en) * | 2022-04-30 | 2022-07-29 | 徐德富 | Method for machining and mounting high-form-position precision part |
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