CN102029502B - Hot pressing process of connecting rod piston pin hole - Google Patents
Hot pressing process of connecting rod piston pin hole Download PDFInfo
- Publication number
- CN102029502B CN102029502B CN 201110003803 CN201110003803A CN102029502B CN 102029502 B CN102029502 B CN 102029502B CN 201110003803 CN201110003803 CN 201110003803 CN 201110003803 A CN201110003803 A CN 201110003803A CN 102029502 B CN102029502 B CN 102029502B
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- connecting rod
- piston pin
- pin hole
- press mounting
- mounting system
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Abstract
The invention discloses a hot pressing bush device and a hot pressing process of a connecting rod piston pin hole, which are applied to a hot pressing bush of the connecting rod piston pin hole. A press mounting system and an infrared sensing thermodetector are arranged in a high-frequency heating furnace; the high-frequency heating furnace and the press mounting system are controlled by an electric control system respectively; both sides of the press mounting system are provided with high-frequency induction coils; a connecting rod is positioned on a press mounting system panel; a guide sleeve is fixed in the press mounting system; a bush is sleeved on a press-in shaft; axial motion of the press-in shaft and a positioning mandrel is controlled by the electric control system respectively; and a protective cap is arranged at the periphery of the high-frequency heating furnace. During press mounting, a connecting rod piston pin hole end is put into the high-frequency heating furnace and the high-frequency induction coil and the infrared sensing thermodetector are used for heating and monitoring quickly. When a set temperature is reached, heating is stopped and press mounting is performed on the connecting rod piston pin hole by the press mounting system. The host pressing bush is adopted and the jointing degree between the bush and the piston pin hole is close to 100 percent, so that the press-in force of the bush is lowered, an outer wall is prevented from being broken by press-in of the bush and safe operation of an engine is ensured.
Description
Technical field
The present invention relates to the Manufacturing Technology for Automotive Parts field, particularly a kind of hot-pressing bushing device for piston pin hole of connecting rod and heat pressing process thereof.
Background technology
About press-fiting of piston pin hole of connecting rod lining, present common way all is to adopt to utilize at normal temperatures press-loading device directly lining to be pressed in the piston pin hole.Press-fit approach can satisfy function although cold pressing, and has following drawback:
1, sleeve surface is pulled easily, causes lining to come off.Because be interference fit between lining and the piston pin hole, the external diameter of lining is larger than piston pin hole, if there are any burr or projection in the piston pin hole porch, must cause so the lining outer wall to pull, and causes lining to come off in engine operation.
2, the applying degree is lower between lining and piston pin hole.Be the insurmountable problem of colding pressing as the applying degree that press-fits most important performance assessment criteria, normal index is to guarantee that the applying rate of supporting region is more than 85% always.But adopt the interference fit outside to be pressed into owing to cold pressing, the magnitude of interference is 0.1mm, monolateral magnitude of interference 0.05mm, when being pressed into, gap between lining guide pin bushing and the lining and positioning core axle are with the gap between the piston pin hole, can't guarantee that all lining is pressed into from the center of piston pin hole, thereby cause overall applying rate lower.
Required pressure was larger when 3, lining was pressed into.Owing to adopt the interference fit of colding pressing, thereby whole process of press in needs larger pressing-in force.
Summary of the invention
For overcoming the deficiencies in the prior art, goal of the invention of the present invention is to provide a kind of hot-pressing bushing device for piston pin hole of connecting rod and heat pressing process thereof, by adopt the hot pressing dress between lining and piston pin hole, to reach the reduction pressing-in force, improve lining applying rate, and prevent the purpose that sleeve surface is pulled.
For achieving the above object, technical program of the present invention lies in: press mounting system is housed in the dielectric heating oven, and dielectric heating oven and press mounting system are controlled by electric control system respectively; The temperature inductor of infrared sensing temperature measurer is housed in the dielectric heating oven, and the display of infrared sensing temperature measurer is outside at dielectric heating oven; Radio-frequency induction coil is equipped with in the both sides of press mounting system, and connecting rod is positioned on the workbench of press mounting system, and guide pin bushing is fixed in the press mounting system, and lining is enclosed within and is pressed on the axle, and the axially-movable that is pressed into axle and apotting spindle is controlled by electric control system respectively; Protective cover is housed around the dielectric heating oven.
Hot pressing is undertaken by following technology mode:
The piston pin nose end of heating connecting rod: the piston pin nose end of connecting rod is put into dielectric heating oven, start high-frequency heating apparatus, be controlled at heat time heating time between the 10-20s; In heating process, utilize the infrared sensing temperature measurer to carry out dynamic temperature control; When temperature arrives 200 ± 10 ℃, stop to continue to heat up, keep 200 ± 10 ℃ of temperature between 10-20s, guarantee the temperature uniformity of whole piston pin hole of connecting rod end.
Press-fit lining: lining is enclosed within is pressed on the axle, utilize the groove of both sides to position; Connecting rod is put on the workbench of press mounting system, detected the temperature of the piston pin end of connecting rod by the infrared sensing temperature measurer, if temperature drop surpasses 7 ℃, then electric control system is reported to the police, if within scope, then the bottom positioning core axle at first rises, and connecting rod is located; The bottom of the guide pin bushing on top is imitative type structure, keeps angle consistent with the side of the piston pin hole of connecting rod; After the positioning core axle location, the axle that is pressed into that puts lining is pressed into lining in the piston pin hole of connecting rod along guide pin bushing fast, and the time is controlled in the 200ms.
The present invention has following advantage compared with the prior art:
1, adopt the hot pressing lining can improve lining applying degree: when piston pin hole of connecting rod is heated to 200 ± 10 ℃, the aperture has the expansion of 0.12-0.17mm, and Outer Diameter of lining is than the large 0.08-0.12mm of piston pin bottom outlet before not heating, therefore after the heating, lining at the in advance lower and piston pin hole applying degree that is not affected by other factors near 100%.
2, can reduce pressing-in force: because after the heating, the piston pin hole aperture can become large 0.12-0.17mm, and Outer Diameter of lining is than the large 0.08-0.12mm of piston pin bottom outlet before not heating, overall calculation comes, the aperture ratio Outer Diameter of lining of piston pin hole is large after the heating, but between lining guide pin bushing and the lining, there is the gap in alignment pin with piston pin hole, pressing-in force can not be zero.
3, can avoid the lining outer wall to pull, effectively guarantee the safe operation of engine: because after heating, the piston pin hole aperture can become large 0.12-0.17mm, and Outer Diameter of lining is than the large 0.08-0.12mm of piston pin bottom outlet before not heating, when being pressed into, the outer wall of lining can freely pass through basically with piston pin hole, and to draw also be very little cut even draw.
Description of drawings
The present invention is described in further detail below in conjunction with accompanying drawing.
Fig. 1 is structural representation sketch of the present invention;
Fig. 2 is Fig. 1
Side view.
The specific embodiment
As shown in Figure 1 and Figure 2, wherein Fig. 2 has only drawn Fig. 1's
axially press-fit the part side view.There are crankshaft hole 2 and piston pin hole 3 in the two ends of connecting rod 1, and press mounting system 9 is housed in the dielectric heating oven 4; The temperature inductor of infrared sensing temperature measurer 11 partly is contained in the dielectric heating oven 4, be used for the actual heating-up temperature in the induction of high frequency heating furnace 4, the display of infrared sensing temperature measurer 11 is located at dielectric heating oven 4 outsides, with temperature in the demonstration stove directly perceived, dielectric heating oven 4 is controlled automatically by electric control system 10; Radio-frequency induction coil 12 is equipped with in the both sides of press mounting system 9, connecting rod 1 is positioned on the workbench of press mounting system 9, guide pin bushing 8 is fixed in the press mounting system 9, be used for being pressed into the motion guide of axle 6, lining 5 is enclosed within and is pressed on the axle 6, utilize the groove of both sides to position, be pressed into axle 6 and automatically controlled by electric control system 10 respectively with the axially-movable of positioning core axle 7; Protective cover 13 is housed around the dielectric heating oven 4, is used for the security protection of operating process.
Piston pin hole 3 ends of heating connecting rod 1: piston pin hole 3 ends of connecting rod 1 are put into dielectric heating oven 4, start high-frequency heating apparatus, be controlled at heat time heating time between the 10-20s; In heating process, utilize infrared sensing temperature measurer 11 to carry out dynamic temperature control; When temperature arrives 200 ± 10 ℃, stop to continue to heat up, keep 200 ± 10 ℃ of temperature between 10-20s, guarantee the temperature uniformity of whole piston pin hole of connecting rod end.
Press-fit lining 5: lining 5 is enclosed within is pressed on the axle 6, utilize the groove of both sides to position; Connecting rod 1 is put on the workbench of press mounting system 9, detected the temperature of the piston pin end of connecting rods 1 by infrared sensing temperature measurer 11, if temperature drop is above 7 ℃, then electric control system 10 is reported to the police, if within scope, then bottom positioning core axle 7 at first rises, to connecting rod 1 location; The bottom of the guide pin bushing 8 on top is imitative type structure, keeps angle consistent with the side of the piston pin hole 3 of connecting rod 1; After positioning core axle 7 location, the axle 6 that is pressed into that puts lining 5 is pressed into lining 5 in the piston pin hole of connecting rod 3 along guide pin bushing 8 fast, and the time is controlled in the 200ms.
Claims (1)
1. the heat pressing process of a piston pin hole of connecting rod hot pressing lining, it is characterized in that: hot pressing is undertaken by following technology mode in hot-pressing bushing device for piston pin hole of connecting rod:
Piston pin hole (3) end of heating connecting rod (1): piston pin hole (3) end of connecting rod (1) is put into dielectric heating oven (4), start high-frequency heating apparatus, be controlled at heat time heating time between the 10-20s; In heating process, utilize infrared sensing temperature measurer (11) to carry out dynamic temperature control; When temperature arrives 200 ± 10 ℃, stop to continue to heat up, keep 200 ± 10 ℃ of temperature between 10-20s, guarantee the temperature uniformity of whole connecting rod (1) piston pin nose end;
Press-fit lining (5): lining (5) is enclosed within is pressed on the axle (6), utilize the groove of both sides to position; Connecting rod (1) is put on the workbench of press mounting system (9), detect the temperature of the piston pin end of connecting rod (1) by infrared sensing temperature measurer (11), if temperature drop is above 7 ℃, then electric control system (10) is reported to the police, if within scope, then bottom positioning core axle (7) at first rises, and connecting rod (1) is located; The bottom of the guide pin bushing on top (8) keeps angle consistent for imitative type structure, the side of the piston pin hole (3) of same connecting rod (1); After positioning core axle (7) location, the axle (6) that is pressed into that puts lining (5) is pressed into lining (5) in the piston pin hole of connecting rod (3) along guide pin bushing (8) fast, and the time is controlled in the 200ms;
Press mounting system (9) is housed in the dielectric heating oven of described hot-pressing bushing device for piston pin hole of connecting rod (4), and dielectric heating oven (4) is controlled by electric control system (10) respectively with press mounting system (9);
The temperature inductor of infrared sensing temperature measurer (11) is housed in the described dielectric heating oven (4), and the display of infrared sensing temperature measurer (11) is in dielectric heating oven (4) outside;
Radio-frequency induction coil (12) is equipped with in the both sides of described press mounting system (9), connecting rod (1) is positioned on the workbench of press mounting system (9), guide pin bushing (8) is fixed in the press mounting system (9), lining (5) is enclosed within and is pressed on the axle (6), is pressed into axle (6) and is controlled by electric control system (10) respectively with the axially-movable of positioning core axle (7);
Described dielectric heating oven (4) is equipped with protective cover (13) on every side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110003803 CN102029502B (en) | 2011-01-10 | 2011-01-10 | Hot pressing process of connecting rod piston pin hole |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110003803 CN102029502B (en) | 2011-01-10 | 2011-01-10 | Hot pressing process of connecting rod piston pin hole |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102029502A CN102029502A (en) | 2011-04-27 |
| CN102029502B true CN102029502B (en) | 2013-01-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110003803 Expired - Fee Related CN102029502B (en) | 2011-01-10 | 2011-01-10 | Hot pressing process of connecting rod piston pin hole |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103894779B (en) * | 2012-12-28 | 2016-09-28 | 北京奇朔科贸有限公司 | Bush press-mounting machine |
| CN104117846B (en) * | 2014-07-23 | 2017-02-15 | 中国船舶重工集团公司第七一一研究所 | Installation tool of connecting rod small end lining and using method of installation tool |
| CN106956122B (en) * | 2017-04-27 | 2023-03-24 | 苏州工业职业技术学院 | Automatic piston pin assembling machine |
| CN109617346B (en) * | 2019-01-30 | 2023-10-13 | 浙江联宜电机有限公司 | Bushing hot press device on motor output shaft |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1958319A (en) * | 2006-11-24 | 2007-05-09 | 株洲时代新材料科技股份有限公司 | Subassembly of buttonhead of car distance rod and sheath, and assembling technique |
| CN101347886A (en) * | 2008-08-27 | 2009-01-21 | 国营江峡船舶柴油机厂 | Nonuniform heating enclosed method in large-sized high-pressure bottle heat sleeve stove |
| CN101462222A (en) * | 2009-01-15 | 2009-06-24 | 上海交通大学 | Shrinkage fit connecting method of worm-gear and leadscrew nut for electric cylinder |
| CN201931251U (en) * | 2011-01-10 | 2011-08-17 | 襄樊市长源东谷实业有限公司 | Hot-pressing bushing device for piston pin hole of connecting rod |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10102710B4 (en) * | 2001-01-22 | 2011-04-28 | Franz Haimer Maschinenbau Kg | Device for inductive heating of a tool holder |
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2011
- 2011-01-10 CN CN 201110003803 patent/CN102029502B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1958319A (en) * | 2006-11-24 | 2007-05-09 | 株洲时代新材料科技股份有限公司 | Subassembly of buttonhead of car distance rod and sheath, and assembling technique |
| CN101347886A (en) * | 2008-08-27 | 2009-01-21 | 国营江峡船舶柴油机厂 | Nonuniform heating enclosed method in large-sized high-pressure bottle heat sleeve stove |
| CN101462222A (en) * | 2009-01-15 | 2009-06-24 | 上海交通大学 | Shrinkage fit connecting method of worm-gear and leadscrew nut for electric cylinder |
| CN201931251U (en) * | 2011-01-10 | 2011-08-17 | 襄樊市长源东谷实业有限公司 | Hot-pressing bushing device for piston pin hole of connecting rod |
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| CN102029502A (en) | 2011-04-27 |
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| C14 | Grant of patent or utility model | ||
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| EE01 | Entry into force of recordation of patent licensing contract |
Application publication date: 20110427 Assignee: Xiangfan Changyuan Donggu Industry & Trade Co., Ltd. Assignor: Beijing Changyuan Long Hong Technology Co., Ltd.|Xiangfan City Changyuan East Valley Industrial Co., Ltd. Contract record no.: 2014420000084 Denomination of invention: Hot pressing process of connecting rod piston pin hole Granted publication date: 20130109 License type: Exclusive License Record date: 20140529 |
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Address after: 441004 east side of Renmin Road, Xiangzhou District, Hubei, Xiangfan Patentee after: Xiangfan Changyuan Donggu Industry & Trade Co., Ltd. Patentee after: Beijing Changyuan Hero City Technology Co., Ltd. Address before: 441004 east side of Renmin Road, Xiangzhou District, Hubei, Xiangfan Patentee before: Xiangfan Changyuan Donggu Industrial Co., Ltd. Patentee before: Beijing Changyuan Hero City Technology Co., Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130109 Termination date: 20170110 |
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| CF01 | Termination of patent right due to non-payment of annual fee |