CN110586757A - Double-layer rolled bush and processing technology thereof - Google Patents
Double-layer rolled bush and processing technology thereof Download PDFInfo
- Publication number
- CN110586757A CN110586757A CN201910890990.3A CN201910890990A CN110586757A CN 110586757 A CN110586757 A CN 110586757A CN 201910890990 A CN201910890990 A CN 201910890990A CN 110586757 A CN110586757 A CN 110586757A
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- sheet
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- riveting
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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
- B21D35/00—Combined processes according to or processes combined with methods covered by groups B21D1/00 - B21D31/00
- B21D35/002—Processes combined with methods covered by groups B21D1/00 - B21D31/00
- B21D35/005—Processes combined with methods covered by groups B21D1/00 - B21D31/00 characterized by the material of the blank or the workpiece
- B21D35/007—Layered blanks
-
- 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
- B21D53/00—Making other particular articles
- B21D53/10—Making other particular articles parts of bearings; sleeves; valve seats or the like
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Insertion Pins And Rivets (AREA)
Abstract
The invention discloses a double-layer rolling bush which comprises an inner layer and an outer layer which are nested and riveted with each other, wherein the inner layer is formed by rolling a first sheet, one end of the inner layer is provided with a first buckle, the other end of the inner layer is correspondingly provided with a first lap groove, a plurality of riveting holes are formed in the vertical central line of the first sheet at intervals, the outer layer is formed by rolling a second sheet, one end of the outer layer is provided with a second buckle, the other end of the outer layer is correspondingly provided with a second lap groove, and the first sheet is riveted with the vertical central line of the second sheet through the riveting holes. According to the double-layer rolling bush disclosed by the invention, the inner and outer double-layer mechanisms are adopted to replace a single-layer thick structure, so that the processing difficulty is reduced and the processing cost is reduced on the premise of ensuring the product performance.
Description
Technical Field
The invention relates to the field of rolled bushings, in particular to a double-layer rolled bushing and a processing technology thereof.
Background
In the production and assembly of automobile parts, a shell is one of important parts, a bushing product is one of important shell forms, the bushing is large in production quantity and diversified in structural form, the machining process of the bushing has various forms, and the existing main machining processes mainly include three types, including metal cutting machining, drawing stamping and rolling stamping. The metal cutting process mainly uses seamless steel tube as raw material, and has the advantages of high precision, low production efficiency and high cost. The stretching and stamping technology uses a multi-station progressive die or a conveying die, and has the advantages of higher production efficiency, high die development cost and lower precision requirement due to more process steps. And the final rolling and stamping are generally carried out by the processes of feeding, cutting appearance, stamping forming, rounding and discharging, so that the production efficiency is high, the precision is ensured, and the stability is good.
The rolling stamping is the most common processing method in the processing of the bush by combining the advantages and the disadvantages of the processing technology, however, the thickness requirement of the bush is gradually increased along with the increase of the variety of the bush, but because the technical parameters and the processing capability of the rolling stamping equipment are different for the processing thickness of the product, the blanking force of the existing production equipment is generally about 40t, only the product with the thickness of 1.5mm to 2mm can be processed, and for some thicker bushes (the thickness reaches more than 3.5 mm), the processing of the technology cannot be realized, and only the former two processing modes with lower efficiency or higher cost can be adopted.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a double-layer rolled bushing and a processing technology thereof.
In order to achieve the purpose, the invention provides the following technical scheme:
the utility model provides a double-deck system bush of rolling up, is including the inlayer and the skin of mutual nested riveting, the inlayer is formed by first sheet material curling, and its one end is equipped with first hasp, and the other end correspondence is equipped with first groove of taking, and the interval is equipped with a plurality of riveting holes on the vertical central line of first sheet material, the skin is formed by the second sheet material curling, and its one end is equipped with the second hasp, and the other end correspondence is equipped with the second and takes the groove, first sheet material is through riveting hole and the vertical central line department riveting of second sheet material.
Preferably, the upper and lower both ends of inlayer stretch out the skin and form the structural limit.
Preferably, a plurality of notches are formed in the structure edge at intervals, and the upper end notch and the lower end notch are arranged in a staggered mode.
The processing technology of the double-layer rolled bush specifically comprises the following steps:
a. the material selection is that a cold-rolled steel strip with the thickness of 1.9 +/-0.02 mm is selected as a first sheet material and a second sheet material, the thermal expansion coefficient of the first sheet material and the second sheet material is 20 ~ 100 ℃, and the temperature change range is 11.59 x 106mm/℃；
b. Feeding: respectively feeding the first sheet and the second sheet into a numerical control lathe;
c. blanking, namely blanking the size of the sheet, the size of the position of the hasp, the position and the size of the open slot according to a design size diagram to form independent sheets, reserving a riveting hole on a vertical central axis of the first sheet, and controlling blanking force P = f L t σ b during blanking, wherein f is an empirical coefficient, the value is 0.6 ~ 0.9.9, L is the length of a trimming line, t is the thickness of the sheet, and σ b is the shearing strength of the sheet;
d. riveting: stacking a second sheet material above the first sheet material, punching the second sheet material above the riveting hole through a punch, and punching the material of the second sheet material corresponding to the position of the riveting hole into the riveting hole to realize the riveting of the first sheet material and the second sheet material;
e. shaping: d, conveying the double-layer sheet riveted in the step d into a bending device, and punching by matching a multi-directional punch with a core rod to obtain a quasi-circular semi-finished product;
f. and e, rounding, namely feeding the quasi-circular semi-finished product processed in the step e into a rounding device, synchronously extruding the quasi-circular semi-finished product by utilizing four rounding blocks distributed in a cross way to match with the core rod to form a circular rolled shell, and blanking.
Preferably, in the step c, the length of the second sheet is greater than the length of the first sheet during blanking.
Compared with the prior art, the double-layer rolled bushing disclosed by the invention has the advantages that a thick bushing is formed by replacing a single-layer structure with double layers, the fastening connection between the double-layer structures is ensured by using a riveting mode, the sheet is punched and cut by using a conventional low-process-capacity punch press during the processing of the double-layer structure, the processing precision is ensured, and the equipment investment cost is not additionally increased.
Bilayer structure's bush has improved technology, utilizes the edge rolling of mutually supporting realization material of diversified drift, then carries out synchronous full circle at the full circle piece that utilizes the cross, and processing degree of automation is high, and the precision of processing is high moreover, and machining efficiency obtains effectively improving.
Drawings
FIG. 1 is a block diagram of an embodiment of the present invention.
Detailed Description
The technical solution of the embodiment of the present invention will be clearly and completely described below with reference to the accompanying drawings.
As shown in figure 1, the double-layer rolling bush disclosed by the invention comprises an inner layer 1 and an outer layer 2 which are nested and riveted with each other, two ends of the inner layer 1 and the outer layer 2 are mutually overlapped, the other sides opposite to the overlapping seams are mutually overlapped, and the inner layer and the outer layer are mutually riveted.
Specifically speaking, the inner layer is formed by first sheet material curling, one end of the inner layer is provided with a first hasp 3, the other end of the inner layer is correspondingly provided with a first lapping groove 4, a plurality of riveting holes 5 are formed in the vertical center line of the first sheet material at intervals, the outer layer is formed by second sheet material curling, one end of the outer layer is provided with a second hasp 6, the other end of the outer layer is correspondingly provided with a second lapping groove 7, the first hasp and the second hasp are in a water drop shape, the first lapping groove and the second lapping groove are also in a water drop shape, when the outer layer is curled, the first hasp is clamped into the first lapping groove and are mutually lapped, the water drop-shaped structures enable certain pulling force to be formed between the first hasp and the second lapping groove, the lapping positions can be guaranteed not to be separated, the same reason is that the second hasp is clamped into the second.
The riveting of inlayer through the riveting hole realization with outer vertical axis department, and the upper and lower both ends of inlayer stretch out outer formation structure limit 8, the structure edge is spaced apart to be equipped with a plurality of notches 9, and upper end notch and lower extreme notch dislocation set.
The processing technology of the double-layer rolled bush specifically comprises the following steps:
a. the material selection is that a cold-rolled steel strip with the thickness of 1.9 +/-0.02 mm is selected as a first sheet and a second sheet, the thermal expansion coefficient of the first sheet is 20 ~ 100 ℃, and the temperature variation range is11.59*106mm/℃；
b. Feeding: respectively feeding the first sheet and the second sheet into a conventional numerical control lathe;
c. blanking, namely blanking the size of the sheet, the size of the position of the hasp, the position and the size of the open slot according to a design size diagram to form independent sheets, reserving a riveting hole on a vertical central axis of the first sheet, and controlling blanking force P = f L t σ b during blanking, wherein f is an empirical coefficient, the value is 0.6 ~ 0.9.9, L is the length of a trimming line (unit mm), t is the thickness of the sheet (unit mm), and σ b is the shearing strength of the sheet (unit MPa);
when punching, attention needs to be paid to the fact that the length of the second sheet is larger than that of the first sheet, so that the second sheet is smoothly wrapped outside the first sheet after being rolled;
d. riveting: stacking a second sheet material above the first sheet material, punching the second sheet material above the riveting hole through a punch, and punching the material of the second sheet material corresponding to the position of the riveting hole into the riveting hole to realize the riveting of the first sheet material and the second sheet material;
e. shaping: d, conveying the double-layer sheet riveted in the step d into a bending device, and punching by matching a multi-directional punch with a core rod to obtain a quasi-circular semi-finished product;
f. and e, rounding, namely feeding the quasi-circular semi-finished product processed in the step e into a rounding device, synchronously extruding the quasi-circular semi-finished product by utilizing four rounding blocks distributed in a cross way to match with the core rod to form a circular rolled shell, and blanking.
Therefore, the scope of the present invention should not be limited to the disclosure of the embodiments, but includes various alternatives and modifications without departing from the scope of the present invention, which is defined by the claims of the present patent application.
Claims (5)
1. The utility model provides a double-deck book system bush which characterized in that: including nested riveted inlayer and skin each other, the inlayer is formed by first sheet material curling, and its one end is equipped with first hasp, and the other end correspondence is equipped with first groove of taking, and the interval is equipped with a plurality of riveting holes on the vertical center line of first sheet material, the skin is curled by the second sheet material and is formed, and its one end is equipped with the second hasp, and the other end correspondence is equipped with the second and takes the groove, first sheet material is through riveting hole and the riveting of the vertical center line department of second sheet material.
2. The double-rolled liner of claim 1, wherein: the upper end and the lower end of the inner layer extend out of the outer layer to form a structural edge.
3. A double-rolled liner as claimed in claim 2, wherein: a plurality of notches are formed in the structure edge at intervals, and the upper end notches and the lower end notches are arranged in a staggered mode.
4. A process for manufacturing a double-layer rolled bush, which comprises the steps of: the method specifically comprises the following steps:
a. the material selection is that a cold-rolled steel strip with the thickness of 1.9 +/-0.02 mm is selected as a first sheet material and a second sheet material, the thermal expansion coefficient of the first sheet material and the second sheet material is 20 ~ 100 ℃, and the temperature change range is 11.59 x 106mm/℃；
b. Feeding: respectively feeding the first sheet and the second sheet into a numerical control lathe;
c. blanking, namely blanking the size of the sheet, the size of the position of the hasp, the position and the size of the open slot according to a design size diagram to form independent sheets, reserving a riveting hole on a vertical central axis of the first sheet, and controlling blanking force P = f L t σ b during blanking, wherein f is an empirical coefficient, the value is 0.6 ~ 0.9.9, L is the length of a trimming line, t is the thickness of the sheet, and σ b is the shearing strength of the sheet;
d. riveting: stacking a second sheet material above the first sheet material, punching the second sheet material above the riveting hole through a punch, and punching the material of the second sheet material corresponding to the position of the riveting hole into the riveting hole to realize the riveting of the first sheet material and the second sheet material;
e. shaping: d, conveying the double-layer sheet riveted in the step d into a bending device, and punching by matching a multi-directional punch with a core rod to obtain a quasi-circular semi-finished product;
f. and e, rounding, namely feeding the quasi-circular semi-finished product processed in the step e into a rounding device, synchronously extruding the quasi-circular semi-finished product by utilizing four rounding blocks distributed in a cross way to match with the core rod to form a circular rolled shell, and blanking.
5. The processing technology of the double-layer rolled bush according to claim 4, characterized in that: in the step c, the length of the second sheet is larger than that of the first sheet during blanking.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910890990.3A CN110586757A (en) | 2019-09-20 | 2019-09-20 | Double-layer rolled bush and processing technology thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910890990.3A CN110586757A (en) | 2019-09-20 | 2019-09-20 | Double-layer rolled bush and processing technology thereof |
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| CN110586757A true CN110586757A (en) | 2019-12-20 |
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| CN201910890990.3A Pending CN110586757A (en) | 2019-09-20 | 2019-09-20 | Double-layer rolled bush and processing technology thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111804810A (en) * | 2020-07-09 | 2020-10-23 | 哈尔滨工业大学 | Forming method of NiAl alloy complex thin-wall hollow component |
| WO2022242625A1 (en) * | 2021-05-19 | 2022-11-24 | 深圳市美大行科技有限公司 | Bicycle rim manufacturing method |
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| CN105882342A (en) * | 2016-05-09 | 2016-08-24 | 徐�明 | Stamped automobile liner tube and preparation technique thereof |
| CN106130209A (en) * | 2016-08-25 | 2016-11-16 | 宁波菲仕电机技术有限公司 | The internal tooth outer stator structure of a kind of motor and manufacture method thereof |
| CN109968680A (en) * | 2019-04-12 | 2019-07-05 | 吉林大学 | A kind of carbon fibre composite and aluminium alloy based on pulse current is without rivet riveting device and method |
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2019
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| JP2000292107A (en) * | 1999-03-31 | 2000-10-20 | Kawaguchiko Seimitsu Co Ltd | Automatic-sizing head |
| CN102056687A (en) * | 2008-06-06 | 2011-05-11 | 艾森鲍.克莱默有限责任公司 | Method for producing a large steel tube |
| CN201521631U (en) * | 2009-11-03 | 2010-07-07 | 三门峡化工机械有限公司 | Cylinder body of pressure vessel |
| CN202867567U (en) * | 2012-09-28 | 2013-04-10 | 东风康明斯发动机有限公司 | Connecting rod sleeve with two-direction-arrowed lubricating oil channel |
| WO2014195500A2 (en) * | 2013-06-06 | 2014-12-11 | Mauser-Werke Oberndorf Maschinenbau Gmbh | Bearing assembly and method for producing a bearing assembly |
| CN103447828A (en) * | 2013-08-14 | 2013-12-18 | 佛山市顺德区三合工业自动化设备有限公司 | Straight iron core rounding mechanism and rounding method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111804810A (en) * | 2020-07-09 | 2020-10-23 | 哈尔滨工业大学 | Forming method of NiAl alloy complex thin-wall hollow component |
| CN111804810B (en) * | 2020-07-09 | 2022-02-15 | 哈尔滨工业大学 | Forming method of NiAl alloy complex thin-wall hollow component |
| WO2022242625A1 (en) * | 2021-05-19 | 2022-11-24 | 深圳市美大行科技有限公司 | Bicycle rim manufacturing method |
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Application publication date: 20191220 |
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