CN110900108B - Production method of positioning connecting bracket - Google Patents
Production method of positioning connecting bracket Download PDFInfo
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- CN110900108B CN110900108B CN201811072920.9A CN201811072920A CN110900108B CN 110900108 B CN110900108 B CN 110900108B CN 201811072920 A CN201811072920 A CN 201811072920A CN 110900108 B CN110900108 B CN 110900108B
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- mounting hole
- mounting holes
- machining
- bracket
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 12
- 238000003801 milling Methods 0.000 claims abstract description 41
- 238000003754 machining Methods 0.000 claims abstract description 25
- 238000000034 method Methods 0.000 claims abstract description 7
- 238000004140 cleaning Methods 0.000 claims abstract description 4
- 238000005452 bending Methods 0.000 claims description 36
- 238000003825 pressing Methods 0.000 claims description 11
- 238000005056 compaction Methods 0.000 claims description 7
- 238000004513 sizing Methods 0.000 claims description 2
- 239000000463 material Substances 0.000 description 4
- 238000005336 cracking Methods 0.000 description 3
- 238000007493 shaping process Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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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)
- Jigs For Machine Tools (AREA)
Abstract
The invention discloses a production method of a positioning connecting bracket, which is characterized by comprising the following steps: 1) the bracket body is formed by continuous fine blanking and deburring; 2) the bracket body is bent, so that the side surface with the connecting rod mounting hole is vertical to the bottom surface with the bearing mounting hole and the boss; 3) and (4) machining three mounting holes by adopting a CNC (computer numerical control) machining milling machine, and cleaning by adopting ultrasonic waves. The invention adopts reasonable and efficient processing procedures, combines the processing of a high-precision machine tool, a high-precision clamp and a high-precision cutter, realizes the high-precision positioning and connecting of the bracket, solves the processing problem in the prior art and has breakthrough significance.
Description
Technical Field
The invention relates to a production method of a positioning connecting bracket, in particular to a production method of a positioning connecting bracket used on a linear exhaust gas circulating valve.
Background
A linear exhaust gas recirculation valve, i.e., an EGR valve, is a mechatronic product mounted on an engine for controlling the amount of exhaust gas recirculation fed back to an intake system. The machining precision requirement of the positioning connecting support on the EGR valve is extremely high, so the machining difficulty is large, and the main machining difficulty is as follows: 1. the product is made of a high-strength steel plate material, such as an SUS 3014/1 HA material, the high-hardness material HAs large bending resilience, so that the bending precision is difficult to achieve, and the bending part is easy to crack; 2. the aperture of the mounting hole between the positioning connecting supports and the distance between the mounting holes are not provided with the maximum entity, and the compensation standard can not be obtained, so that the precision requirement is extremely high, the traditional process is adopted, the processing precision is difficult to reach, the bending part can crack, and the rejection rate is extremely high.
Disclosure of Invention
In view of the technical problems in the background art, the invention aims to provide a production method of a positioning connecting bracket with high machining precision and high qualification rate.
In order to solve the technical problems, the invention is realized by adopting the following technical scheme: the production method of the positioning connecting bracket is characterized by comprising the following steps of:
1) the bracket body is formed by continuous fine blanking and deburring, three mounting holes and two bosses are arranged on the bracket body, the bosses are arranged at two ends of the bracket body, the three mounting holes are respectively two bearing mounting holes and one connecting rod mounting hole, the central points of the three mounting holes are on the same straight line, and machining allowance is reserved in the three mounting holes;
2) the support body is bent, so that the side face with the connecting rod mounting hole is perpendicular to the bottom face with the bearing mounting hole and the boss, and the bending operation is sequentially carried out according to the following steps: A. processing chamfers at two side edges of the bending part; B. bending in three steps, namely sequentially bending by 30 degrees, 60 degrees and 90 degrees by adopting a punch; C. stamping the bent bracket body by adopting a V-shaped sizing die;
3) machining three mounting holes by adopting a CNC (computer numerical control) machining milling machine, and cleaning by adopting ultrasonic waves; CNC processing milling machine is including five milling cutters, and adopts milling cutter to process No. one to No. five in proper order, and milling cutter processing bearing mounting hole and connecting rod mounting hole No. one, and No. two milling cutter processing bearing mounting holes, No. three milling cutter processing connecting rod mounting holes, the plane of two bosss of milling cutter processing No. four, the chamfer at No. five milling cutter processing bearing mounting holes and connecting rod mounting hole both ends.
And 2) machining the chamfer angle in the step 2) by adopting a CNC machining milling machine, wherein the radius of the chamfer angle is 0.6 mm.
CNC processing milling machine is including the graduated disk and install the anchor clamps on the graduated disk, anchor clamps are including the base, install the mould on the base and the clamp plate that can go up and down, the mould has the die cavity with the bottom surface tight fit of support body, set up the handle hole that supplies the compaction piece to pass on the clamp plate, when the operating mode, the clamp plate is with the support body compaction, just handle hole on the clamp plate corresponds the setting with the bearing mounting hole.
The pressing plate is connected with an air cylinder which drives the pressing plate to lift, guide holes for guide pillars to penetrate are formed in the base and the die, the number of the guide pillars is two, the guide pillars are connected with two ends of the pressing plate, a piston rod of the air cylinder is connected with the guide pillars, and the air cylinder is installed on the rack.
After the support body is formed by blanking, bending is firstly carried out, then finish machining of the mounting hole is carried out, and the bending machining is carried out step by step, so that bending cracking is prevented, the bending angle of the support body is stable, the precision is high, and the finish machining of the mounting hole reaches a high-precision standard by adopting special finish machining equipment and a special clamp.
Drawings
FIG. 1 is a schematic view of a positioning attachment bracket of the present invention.
FIG. 2 is a schematic view of the bracket body of the present invention during blanking.
FIG. 3 is a schematic view of the structure of the clamp of the present invention.
Detailed Description
The details of the present invention are further described below with reference to the accompanying drawings.
The production method of the positioning connecting bracket comprises the following steps:
1) support body 6 is by the shaping of continuous essence towards blanking and deburring, three mounting hole and two bosss 1 have on the support body 6, boss 1 sets up at the both ends of support body 6, and three mounting hole is two bearing mounting holes 2 and a connecting rod mounting hole 3 respectively, and the central point of three mounting hole is on same straight line, and the three mounting hole all leaves the processing allowance, and the allowance reservation has 0.5mm, and the allowance that leaves is processed by subsequent milling machine.
2) The support body 6 is bent to enable the side surface 5 with the connecting rod mounting hole to be perpendicular to the bottom surface 4 with the bearing mounting hole and the boss, and the bending operation is sequentially carried out according to the following steps: A. processing chamfers on two side edges of a bending position, wherein the chamfers are processed by a CNC (computer numerical control) processing milling machine, the radius of each chamfer is 0.6mm, and the chamfer processing is used for subsequent bending to prevent the bending position from cracking; B. bending is carried out after chamfering processing is finished, the bending is divided into three steps, 30-degree bending, 60-degree bending and 90-degree bending are carried out in sequence by adopting a punch press, namely the bending is not carried out by directly punching 90 degrees by the punch press, namely the bending is carried out by 30 degrees firstly, then the bending is carried out by 30 degrees continuously to form a 60-degree angle, and finally the bending is carried out by 30 degrees, so that the 90-degree bending is finished, the side surface is perpendicular to the bottom surface, and the problems of low elongation and difficult bending of raw materials are solved by using a neutral layer of the material to bend the product step by step; C. after the bending is finished, in order to keep the angle of the support body stable and avoid rebounding, the bent support body is stamped by a V-shaped shaping die after the bending is finished, and the stability of the angle is ensured. In order to prevent the change of the shape and the aperture of the mounting hole caused by bending, the invention adopts the steps of bending and then finish machining of the mounting hole, and the invention avoids the cracking of the bracket body, keeps the bending angle stable and ensures the completion of the subsequent high-precision machining of the mounting hole.
3) Machining three mounting holes by adopting a CNC (computer numerical control) machining milling machine, and cleaning by adopting ultrasonic waves; the CNC machining milling machine comprises five milling cutters, an index plate and a clamp arranged on the index plate, wherein the clamp comprises a base 13, dies 12 arranged on the base and a pressing plate 11 capable of lifting, six dies 12 are arranged on the base 13 and are arranged in two rows, the pressing plate 11 is connected with a cylinder 14 driving the pressing plate to lift, guide holes for guide pillars 15 to penetrate through are formed in the base and the dies, two guide pillars 15 are arranged on the base and the dies, the guide pillars 15 are connected with two ends of the pressing plate 11, a piston rod of the cylinder 14 is connected with the guide pillars 15, and the cylinder 14 is arranged on a rack, namely the cylinder 14 drives the guide pillars 15 and the pressing plate 11 connected with the guide pillars to lift; the mould 12 has the die cavity of 4 tight fittings with the bottom surface of support body, and the support body just can reach the requirement of high accuracy with the die cavity tight fitting, set up the operation hole that supplies the compaction piece to pass on the clamp plate 11, when the operating mode, cylinder 14 drives clamp plate 11 and moves down and compacts support body 6, just operation hole on the clamp plate 11 corresponds the setting with bearing mounting hole 2, and operating personnel carries out manual compaction to the support body through the compaction piece, ensures that the bottom surface of support body impresses in the die cavity of mould, and when the hole milling, milling cutter passes the operation hole and processes the bearing mounting hole. The bracket body is sequentially processed by using first to fifth milling cutters, the aperture of the bearing mounting hole 2 is smaller than that of the connecting rod mounting hole 3, the hole milling is not completed once, but different milling cutters are used for milling holes step by step, so that the precision of the milling cutters is higher, the precision of the processed mounting holes is also higher, and the hole milling steps are as follows: no. one milling cutter processing bearing mounting hole 2 and connecting rod mounting hole 3, No. two milling cutter processing bearing mounting holes 2, No. three milling cutter processing connecting rod mounting hole 3, No. four milling cutter processing two planes of boss 1, No. five milling cutter processing bearing mounting hole and the chamfer at connecting rod mounting hole both ends.
4) And finally, carrying out full inspection by adopting a Chua' CMM three-coordinate device to ensure that products delivered from a factory meet the high-precision requirement.
The invention adopts reasonable and efficient processing procedures, combines the processing of a high-precision machine tool, a high-precision clamp and a high-precision cutter, realizes the high-precision positioning and connecting of the bracket, solves the processing problem in the prior art and has breakthrough significance.
Claims (4)
1. A production method of a positioning connecting bracket is characterized in that: the method comprises the following steps:
1) the bracket body is formed by continuous fine blanking and deburring, three mounting holes and two bosses are arranged on the bracket body, the bosses are arranged at two ends of the bracket body, the three mounting holes are respectively two bearing mounting holes and one connecting rod mounting hole, the central points of the three mounting holes are on the same straight line, and machining allowance is reserved in the three mounting holes;
2) the support body is bent, so that the side face with the connecting rod mounting hole is perpendicular to the bottom face with the bearing mounting hole and the boss, and the bending operation is sequentially carried out according to the following steps: A. processing chamfers at two side edges of the bending part; B. bending in three steps, namely sequentially bending by 30 degrees, 60 degrees and 90 degrees by adopting a punch; C. stamping the bent bracket body by adopting a V-shaped sizing die;
3) machining three mounting holes by adopting a CNC (computer numerical control) machining milling machine, and cleaning by adopting ultrasonic waves; CNC processing milling machine is including five milling cutters, and adopts milling cutter to process No. one to No. five in proper order, and milling cutter processing bearing mounting hole and connecting rod mounting hole No. one, and No. two milling cutter processing bearing mounting holes, No. three milling cutter processing connecting rod mounting holes, the plane of two bosss of milling cutter processing No. four, the chamfer at No. five milling cutter processing bearing mounting holes and connecting rod mounting hole both ends.
2. The method for producing a positioning-connection bracket as set forth in claim 1, wherein: and 2) machining the chamfer angle in the step 2) by adopting a CNC machining milling machine, wherein the radius of the chamfer angle is 0.6 mm.
3. The method for producing a positioning-connection bracket as set forth in claim 1, wherein: CNC processing milling machine is including the graduated disk and install the anchor clamps on the graduated disk, anchor clamps are including the base, install the mould on the base and the clamp plate that can go up and down, the mould has the die cavity with the bottom surface tight fit of support body, set up the handle hole that supplies the compaction piece to pass on the clamp plate, when the operating mode, the clamp plate is with the support body compaction, just handle hole on the clamp plate corresponds the setting with the bearing mounting hole.
4. The method for producing a positioning-connection bracket as set forth in claim 3, wherein: the pressing plate is connected with an air cylinder which drives the pressing plate to lift, guide holes for guide pillars to penetrate are formed in the base and the die, the number of the guide pillars is two, the guide pillars are connected with two ends of the pressing plate, a piston rod of the air cylinder is connected with the guide pillars, and the air cylinder is installed on the rack.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811072920.9A CN110900108B (en) | 2018-09-14 | 2018-09-14 | Production method of positioning connecting bracket |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811072920.9A CN110900108B (en) | 2018-09-14 | 2018-09-14 | Production method of positioning connecting bracket |
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| Publication Number | Publication Date |
|---|---|
| CN110900108A CN110900108A (en) | 2020-03-24 |
| CN110900108B true CN110900108B (en) | 2021-05-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811072920.9A Active CN110900108B (en) | 2018-09-14 | 2018-09-14 | Production method of positioning connecting bracket |
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| CN (1) | CN110900108B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115338289A (en) * | 2022-08-17 | 2022-11-15 | 武汉华夏精冲技术有限公司 | Bent brake disc and machining method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9593702B2 (en) * | 2013-09-20 | 2017-03-14 | Arconic Inc. | Manufacture and method for forming structures and the structures resulting therefrom |
| CN204921195U (en) * | 2015-07-27 | 2015-12-30 | 广西玉柴机器股份有限公司 | Novel EGR cooler support |
| CN205013156U (en) * | 2015-09-01 | 2016-02-03 | 东风朝阳朝柴动力有限公司 | EGR cooler fixed bolster |
| CN107350345A (en) * | 2017-05-31 | 2017-11-17 | 苏州天吴电梯装璜有限公司 | Hoistway support bending part manufacturing process |
| CN107088611A (en) * | 2017-06-20 | 2017-08-25 | 江苏华灿电讯股份有限公司 | One kind installs board mount and its processing method |
| CN107414431A (en) * | 2017-09-03 | 2017-12-01 | 安徽天裕汽车零部件制造有限公司 | A kind of production technology of automobile support |
| CN108246942B (en) * | 2018-01-16 | 2023-08-04 | 江苏华东正大空调设备有限公司 | Forming structure and forming method of valve blade |
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Denomination of invention: A production method of positioning connecting support Effective date of registration: 20220119 Granted publication date: 20210525 Pledgee: Wenzhou Financing Guarantee Co.,Ltd. Pledgor: ZHONGJING GROUP Co.,Ltd. Registration number: Y2022990000041 |
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Date of cancellation: 20240102 Granted publication date: 20210525 Pledgee: Wenzhou Financing Guarantee Co.,Ltd. Pledgor: ZHONGJING GROUP Co.,Ltd. Registration number: Y2022990000041 |