CN101817138A - Press mounting equipment for pre-assembled workpiece and press mounting mould and method using same - Google Patents
Press mounting equipment for pre-assembled workpiece and press mounting mould and method using same Download PDFInfo
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- CN101817138A CN101817138A CN200910236297A CN200910236297A CN101817138A CN 101817138 A CN101817138 A CN 101817138A CN 200910236297 A CN200910236297 A CN 200910236297A CN 200910236297 A CN200910236297 A CN 200910236297A CN 101817138 A CN101817138 A CN 101817138A
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- core rod
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- coaxial
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- assembled workpiece
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Abstract
The invention discloses a press mounting equipment for a pre-assembled workpiece and a press mounting mould and a press mounting method using the same. The pre-assembled workpiece (such as an oxygen sensor component) applicable to the invention comprises a shell and a coaxial member arranged in the shell, wherein the coaxial member extends coaxially with the shell and is exposed out of the shell. The press mounting equipment for the pre-assembled workpiece of the invention comprises a mould core guide sleeve, a mould core, a buffer device and a positioning sleeve, wherein the mould core is arranged in the mould core guide sleeve in a sliding way and provided with a formed surface which is matched with the profile of a part of the coaxial member exposed out of the shell; the buffer device is arranged between the mould core guide sleeve and the mould core and used for buffering the axial mechanical collision between the mould core and the mould core guide sleeve; and the positioning sleeve is integrally and coaxially formed with the mould core and arranged outside the mould core and used for jointing and positioning the shell of the pre-assembled workpiece. The press mounting equipment can ensure the centering accuracy during the press mounting and therefore solve the problem of fracture of the part in the process.
Description
Technical field
The present invention relates to press-fiting of pre-assembled workpiece, particularly for example press-fiting of oxygen sensor component of automobile profiled piece.
Background technology
The difficult point that press-fits of profiled piece is to be difficult to reach axiality requirement between each parts.A kind of profiled piece that the oxygen sensor in use for car assembly comes to this.The oxygen sensor in use for car assembly is made of housing 2, upper insulator 1, talc lump 5, zirconium element 3 and lower insulator 4 usually, as shown in Figure 2.The gaining the name of profiled piece is derived from it and comprises as upper insulator 1 this parts, and the profile of upper insulator 1 is made up of two sections cylinders and one section cone, is difficult to guarantee the axiality requirement between it and the housing 2 in technical process.Zirconium element 3 is thin-wall parts, along the effect that is subjected to radial load in the press-loading process process of the above-below direction of Fig. 2, can produce transverse movement, therefore is very easy to fracture and causes product rejection.Talc lump 5 is the pulverize powder after press-fiting, and zirconium element 3 is played the effect of location and sealing.The tradition press mounting die is very high to the axiality requirement of upper and lower mould, and axiality reaches 0.03 millimeter, and the processing cost of mould, maintenance cost are all very high, but still can't reduce the number of rejects and seconds rate, and production efficiency is low, and the consumption of core rod is big.
The inventor finds that the reason of zirconium element fracture mainly is to be caused by the fit clearance that reaches between housing 2 and the upper insulator 1 between housing 2 and the counterdie installing hole.Assemble, pick and place workpiece for the ease of the operator, these gaps are again necessary.Because the existence of workpiece fit clearance, although the quality of fit of mould upper and lower mould is very high, in press-fiting process, after contacting, core rod and insulator tapered understand the radial motion of promotion insulator, cause it to depart from the center of housing.Can produce radial thrust like this, thereby cause the fracture of zirconium element the zirconium element.
Therefore, the breakage problem of thin-wall part is not best solution by the accuracy of alignment that improves upper and lower mould only in the press-loading process process.
Summary of the invention
Therefore the purpose of this invention is to provide the equipment that is used to press-fit pre-assembled workpiece, it can guarantee to press-fit the centering accuracy in the process, and avoids the part breaking problem that causes in this process.
The pre-assembled workpiece that the present invention is suitable for comprises housing and is arranged in the housing coaxial, and wherein coaxial with the coaxial extension of housing and expose housing.The equipment that is used to press-fit pre-assembled workpiece of the present invention comprises: the core rod guide pin bushing; Can be slidingly arranged in the core rod in the core rod guide pin bushing, have the forming surface that the external form with coaxial an of part of exposing housing is complementary; Be arranged on the buffer unit between core rod guide pin bushing and the core rod, be used to cushion the axial mechanical collision between core rod and the core rod guide pin bushing; With with the coaxial formation of core rod one and be arranged on the positioning sleeve in the core rod outside, be used to engage and locate the housing of pre-assembled workpiece.
Buffer unit is preferably spring.
The core rod guide pin bushing can be provided with the compressed air inlet, and core rod is provided with the compressed air channel that leads to forming surface, and the compressed air inlet is communicated with compressed air channel by spring.Spring can also be arranged so that core rod fully can directly axially contact with the core rod guide pin bushing behind the compression spring.
The core rod guide pin bushing can also be provided with spacing ring, can engage with core rod and adjust or limit the position of core rod in the core rod guide pin bushing.
The present invention also provides the press mounting die that uses the said equipment, and comprising: first half module is equipped with above-mentioned equipment; With second half module, be used for fixing pre-assembled workpiece.First half module can cooperatively interact with upper and lower relation with second half module.
The present invention also provides the method that press-fits pre-assembled workpiece of using the said equipment, comprising: pre-assembled workpiece is provided, and pre-assembled workpiece comprises housing and is arranged in the housing coaxial, and wherein coaxial with the coaxial extension of housing and expose housing; Pre-assembled workpiece is fixed in the lower mould, makes coaxial an of part of exposing housing towards the top; The said equipment is installed in the upper die, and the forming surface that makes core rod is towards the below; Upper die is aimed at lower mould, and make positioning sleeve engage and locate the housing of pre-assembled workpiece; Make the corresponding coupling external form of the forming surface engages in coaxial part of core rod; Upper die is moved, until reaching predetermined resistance towards lower mould; And make and press-fit workpiece and break away from upper die and lower mould respectively.
Can press-fit for example oxygen sensor component disengaging upper die of workpiece by providing compressed air to make.
The present invention has adopted flexible press-loading process to come fit clearance is compensated, thereby eliminates the influence of this gap to workpiece centering.Concrete advantage is as follows:
(1) reduces maintenance, adjustment, the replacing time of mould, prolonged the running time of production line, improved production efficiency.
(2) percent defective of thin-wall part drops to 200PPM from 1500PPM, has reduced material cost.
(3) 3 times have been increased the service life of core rod.
(4) centering of mould does not need to adjust, and operates easier.
(5) reduced requirement, reduced die manufacturing cost the Mould Machining precision.
Description of drawings
Fig. 1 is the cutaway view that is used to press-fit the equipment of pre-assembled workpiece according to of the present invention.
Fig. 2 is the structural representation of pre-assembled workpiece.
Fig. 3 is the structural representation of lower mould, has wherein fixed the pre-assembled workpiece of Fig. 2.
The specific embodiment
Be that example illustrates the present invention to press-fit oxygen sensor component shown in Figure 2 below.
Parts among Fig. 2 are fitted together in advance form the oxygen sensor in use for car assembly.Oxygen sensor component is made of housing 2, upper insulator (or claiming coaxial) 1, talc lump (or claiming seal) 5, zirconium element (or claiming thin-wall part) 3 and lower insulator (or claiming keeper) 4 usually.Upper insulator 1 is with housing 2 coaxial extensions and expose housing 2.Upper insulator 1, talc lump 5 and lower insulator 4 longitudinally or axially (i.e. vertical direction among the figure) are successively set in the housing 2.Zirconium element 3 longitudinally passes upper insulator 1, talc lump 5 and lower insulator 4.Profile coaxial 1 shown in this is made up of two sections cylinders and one section cone 7.
As shown in Figure 1, the equipment that is used to press-fit pre-assembled workpiece of the present invention comprises core rod guide pin bushing 12.Core rod 10 is slidably disposed in the core rod guide pin bushing 12, has the forming surface (taper surface of lower end promptly) that the external form (being cone 7) with coaxial 1 of a part of exposing housing 2 is complementary.Buffer unit for example spring 8 is arranged between core rod guide pin bushing 12 and the core rod 10, is used to cushion the axial mechanical collision between core rod 10 and the core rod guide pin bushing 12.Spring 8 is arranged so that preferably core rod 10 fully can directly axially contact with core rod guide pin bushing 12 behind the compression spring 8.Positioning sleeve 11 is with the coaxial formation of core rod 10 one and be arranged on core rod 10 outsides, is used to engage and locate the housing 2 of pre-assembled workpiece, for example can engage with the excircle part 6 of housing 2.
Core rod guide pin bushing 12 is provided with compressed air inlet 13, is connected with external compression air source (not shown).Core rod 10 is provided with the compressed air channel 14 that leads to forming surface.Compressed air inlet 13 is communicated with compressed air channel 14 by spring 8.Press-fit finish after, compressed air ejects workpiece by passage 14 from core rod 10.
Core rod guide pin bushing 12 also is provided with spacing ring 9, can engage with core rod 10 or positioning sleeve 11 and adjust or limit the position of core rod 10 in core rod guide pin bushing 12.
Operation principle of the present invention below is described.
The above-mentioned equipment (or title " workpiece press-loading device ") that is used for press-fiting pre-assembled workpiece is fixedly mounted on the patrix (not shown).Workpiece after assembling in advance is fixed in the counterdie 15.Upper die and lower die 15 are realized relative motion by driving mechanism (conventional mechanism known in the art, not shown) and detent mechanism (conventional mechanism known in the art, not shown) and are accurately located.
After finishing the location between the upper and lower mould, patrix drives the workpiece press-loading device to be continued to move downward, and positioning sleeve 11 at first contacts with the excircle part 6 of housing 2, has realized the Primary Location of workpiece.Patrix continues to move downward subsequently, and core rod 10 contacts with upper insulator 1.Because the forming surface (taper seat) of core rod 10 lower ends is consistent with the external form (taper seat) of the cone 7 of upper insulator 1, thereby can dynamically adjust the radial position of upper insulator 1 with respect to housing 2, realize the radially precision positioning between upper insulator 1 and the housing 2.This positioning accuracy is guaranteed by the machining accuracy (axiality) of core rod 10 with positioning sleeve 11.Core rod 10 upwards slides and compression spring 8 in core rod guide pin bushing 12 when adjusting upper insulator 1 position.Between core rod 10 and the upper insulator 1 is not hard the contact, thereby the flexibility that realizes upper insulator 1 moves radially.Patrix continues to move downward, and finishes radial alignment (being housing 2 and upper insulator 1 coaxial alignment).Core rod 10 contacts with the bottom of core rod guide pin bushing 12 in compression spring 8 backs, does not recompress spring 8.Core rod 10 changes hard contact into contacting from the flexibility contact of upper insulator 1 like this.Upper insulator 1 is delivered to pressure (for example 2100KG) on the talc lump 5, it is crushed to Powdered, thereby realize the location and the sealing of zirconium element 3.Patrix reaches predetermined value at pressure and for example upwards returns during 2100KG.Counterdie 15 separates thus with patrix, therefrom takes out to press-fit the workpiece of finishing.
The present invention has increased positioning sleeve 11 on core rod 10, its effect is that housing 2 is carried out preliminary radial location.Core rod 10 is a slidingtype, can in core rod guide pin bushing 12, slide up and down, and compression spring 8, realize contacting with the flexibility of upper insulator 1.This structure can be eliminated the fit-up gap between the workpiece, and upper insulator 1 is carried out automatic capturing, has realized the precision positioning between upper insulator 1 and the housing 2.In addition, the present invention changes existing discharging device into contactless pneumatic liftout attachment by mechanical knock-pin, thereby has eliminated knock-pin to location influence.
Though above embodiment with reference to oxygen sensor component describe the present invention, it will be appreciated by those skilled in the art that the present invention is not so limited.On the contrary, the present invention is applicable to any pre-assembled workpiece with shell and coaxial is press-fited.
Claims (10)
1. equipment that is used to press-fit pre-assembled workpiece, pre-assembled workpiece comprise housing and are arranged in the housing coaxial, and wherein coaxial with the coaxial extension of housing and expose housing, and described equipment comprises:
The core rod guide pin bushing,
Can be slidingly arranged in the core rod in the core rod guide pin bushing, have the forming surface that the external form with coaxial an of part of exposing housing is complementary,
Be arranged on the buffer unit between core rod guide pin bushing and the core rod, be used to cushion between core rod and the core rod guide pin bushing axial mechanical collision and
With the coaxial formation of core rod one and be arranged on the positioning sleeve in the core rod outside, be used to engage and locate the housing of pre-assembled workpiece.
2. the equipment of claim 1, wherein buffer unit is a spring.
3. the equipment of claim 2, wherein the core rod guide pin bushing is provided with the compressed air inlet, and core rod is provided with the compressed air channel that leads to forming surface, and the compressed air inlet is communicated with compressed air channel by spring.
4. the equipment of claim 3, its medi-spring are arranged so that core rod fully can directly axially contact with the core rod guide pin bushing behind the compression spring.
5. the equipment of claim 1, wherein the core rod guide pin bushing also is provided with spacing ring, can engage with core rod and adjust or limit the position of core rod in the core rod guide pin bushing.
6. press mounting die comprises:
First half module is equipped with the equipment of one of aforesaid right requirement; With
Second half module is used for fixing pre-assembled workpiece.
7. the press mounting die of claim 6, wherein first half module and second half module cooperatively interact with upper and lower relation.
8. method that press-fits pre-assembled workpiece comprises:
Pre-assembled workpiece is provided, and pre-assembled workpiece comprises housing and is arranged in the housing coaxial, and wherein coaxial with the coaxial extension of housing and expose housing;
Pre-assembled workpiece is fixed in the lower mould, makes coaxial an of part of exposing housing towards the top;
The equipment of one of claim 1-5 is installed in the upper die, and the forming surface that makes core rod is towards the below;
Upper die is aimed at lower mould, and make positioning sleeve engage and locate the housing of pre-assembled workpiece;
Make the corresponding coupling external form of the forming surface engages in coaxial part of core rod;
Upper die is moved, until reaching predetermined resistance towards lower mould; And
Make and press-fit workpiece and break away from upper die and lower mould respectively.
9. the method for claim 8, wherein the equipment with claim 3 or 4 is installed in the upper die, breaks away from upper die by providing compressed air to make to the compressed air inlet to press-fit workpiece.
10. the method for claim 8, wherein workpiece is an oxygen sensor component.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102362970A CN101817138B (en) | 2009-11-02 | 2009-11-02 | Method of press mounting equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102362970A CN101817138B (en) | 2009-11-02 | 2009-11-02 | Method of press mounting equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101817138A true CN101817138A (en) | 2010-09-01 |
| CN101817138B CN101817138B (en) | 2011-12-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009102362970A Expired - Fee Related CN101817138B (en) | 2009-11-02 | 2009-11-02 | Method of press mounting equipment |
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| Country | Link |
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| CN (1) | CN101817138B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103949891A (en) * | 2014-04-23 | 2014-07-30 | 温州大学 | Automatic production line device for packaging oxygen sensor |
| CN104589028A (en) * | 2014-11-27 | 2015-05-06 | 北京博曼迪汽车科技有限公司 | Riveting device of sensor wire harness outer cover |
| CN106141672A (en) * | 2016-08-24 | 2016-11-23 | 浙江朗德电子科技有限公司 | A kind of chip oxygen sensor probe installation equipment |
| CN110000539A (en) * | 2018-07-25 | 2019-07-12 | 宁波优微智能科技有限公司 | A kind of positioning riveting tooling |
-
2009
- 2009-11-02 CN CN2009102362970A patent/CN101817138B/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103949891A (en) * | 2014-04-23 | 2014-07-30 | 温州大学 | Automatic production line device for packaging oxygen sensor |
| CN104589028A (en) * | 2014-11-27 | 2015-05-06 | 北京博曼迪汽车科技有限公司 | Riveting device of sensor wire harness outer cover |
| CN106141672A (en) * | 2016-08-24 | 2016-11-23 | 浙江朗德电子科技有限公司 | A kind of chip oxygen sensor probe installation equipment |
| CN106141672B (en) * | 2016-08-24 | 2018-01-26 | 浙江朗德电子科技有限公司 | A kind of chip oxygen sensor probe installation equipment |
| CN110000539A (en) * | 2018-07-25 | 2019-07-12 | 宁波优微智能科技有限公司 | A kind of positioning riveting tooling |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101817138B (en) | 2011-12-14 |
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Granted publication date: 20111214 Termination date: 20191102 |
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| CF01 | Termination of patent right due to non-payment of annual fee |