CN102873633A - Method for extruding and polishing inner hole of shaft workpiece - Google Patents

Method for extruding and polishing inner hole of shaft workpiece Download PDF

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Publication number
CN102873633A
CN102873633A CN2012103403132A CN201210340313A CN102873633A CN 102873633 A CN102873633 A CN 102873633A CN 2012103403132 A CN2012103403132 A CN 2012103403132A CN 201210340313 A CN201210340313 A CN 201210340313A CN 102873633 A CN102873633 A CN 102873633A
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China
Prior art keywords
workpiece
inner hole
placenta
diameter
polishing
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Pending
Application number
CN2012103403132A
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Chinese (zh)
Inventor
单宝楠
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
DALIAN LIANDE MAISHI PRECISION SHAFT Co Ltd
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DALIAN LIANDE MAISHI PRECISION SHAFT Co Ltd
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Application filed by DALIAN LIANDE MAISHI PRECISION SHAFT Co Ltd filed Critical DALIAN LIANDE MAISHI PRECISION SHAFT Co Ltd
Priority to CN2012103403132A priority Critical patent/CN102873633A/en
Publication of CN102873633A publication Critical patent/CN102873633A/en
Pending legal-status Critical Current

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Abstract

The invention relates to a method for extruding and polishing an inner hole of a shaft workpiece. The method comprises the following steps of: inserting the workpiece into a slot I of a workpiece seat, and allowing the workpiece to be coaxial with a pressing rod; clamping the workpiece seat, turning on a power supply of a press, and placing a steel ball at an opening at the upper end of the inner hole of the workpiece, wherein the diameter of the steel ball is 0.02 to 0.03mm more than that of the inner hole of the workpiece; and pressing by using an upper pressing block of the press, driving the pressing rod to press the steel ball in the inner hole of the workpiece by using the upper pressing block, allowing the steel ball to pass through the inner hole of the workpiece and fall from the lower end of a slot II of the workpiece seat, and taking the workpiece out, so that the inner hole of the workpiece is polished. Compared with the prior art, the method has the advantages that production cost is reduced, the finish of a product is ensured, the dimensional requirement is met, the method is convenient to operate, a device has a simple structure and is convenient to maintain, and the like.

Description

A kind of processing method of shaft-like workpiece inner hole extruding polishing
Technical fieldThe present invention relates to a kind of method of endoporus polishing, relate in particular to a kind of processing method of shaft-like workpiece inner hole extruding polishing.
Background technologyAs everyone knows, the main parts size of plant equipment during shaft-like workpiece, development along with science and technology, shaft-like workpiece with endoporus is increasing, the automobile engine oil pump shaft is exactly a kind of of this class axle, this class axle is had relatively high expectations to fineness in the hole and aperture size, and especially work in-process guarantees aobvious extremely important of endoporus fineness.
At present, for this shaft-like workpiece main glossing that adopts of endoporus processing of this class axle of automobile engine oil pump shaft for example, and employing is special-purpose inner circle burnishing machine, although it is easy to operate, machining accuracy is high, and equipment cost is too high, bother very much during maintenance, for our some domestic enterprises, existing special-purpose inner circle burnishing machine is difficult for adopting, and is difficult to reach the purpose of processing; In addition, the endoporus roughness of this class axle is had relatively high expectations, and there is relatively high dimension precision requirement in the aperture, and the clamping of workpiece and locate mode have certain limitation, and general processing mode is difficult to guarantee.
Summary of the inventionThe object of the present invention is to provide a kind ofly not only to reduce production costs, guarantee fineness and the dimensional requirement of product, easy to operate, and also apparatus structure is simple, maintenance is convenient, the processing method of the shaft-like workpiece inner hole extruding polishing that labor strength is low.
The present invention establishes for the support mold of supporting workpiece at the workbench of forcing press to locate tire namely, establish for the upper location tire that supports depression bar at the upper holder block of forcing press, depression bar acts on the steel ball that is located the inner hole of workpiece place, finishes the polishing of inner hole of workpiece.
Concrete scheme of the present invention is as follows:
One, the polishing mould: described polishing mould comprises location tire and lower location tire, the workpiece support mold i.e. lower tire of locating also comprises lower placenta, workseat, lower limiting board and adjusting bolt, the bottom surface of lower placenta is bolted on the workbench of forcing press, a square groove identical with lower placenta height is inwardly offered in the front center position of placenta under the edge, establishing the cross section in the square groove is square deck, it is workseat, its width equals the width of square groove substantially, length is less than the degree of depth of square groove, best, workseat is processed as cambered surface towards the positive side of lower placenta, the circular slotted eye I of the opening upwards of inwardly offering along workseat end face center, the bottom of this slotted eye I is provided with coupled logical coaxial circular slotted eye II, the diameter of slotted eye II is less than the diameter of slotted eye I, and the lower ending opening of slotted eye II is located on the lower surface of workseat, and the diameter of described slotted eye I equals the external diameter of workpiece substantially, and the diameter of slotted eye II is greater than the diameter of inner hole of workpiece; Establish the limiting plate that can be the workseat location in the front of described lower placenta, i.e. lower limiting board, this lower limiting board is bolted on the front of lower placenta; The inside of above-mentioned lower placenta is provided with a adjusting bolt that be used for to adjust lower placenta position, and this adjusting bolt is connected on the center line of lower placenta length direction and the workseat of an end in square groove, and the other end is towards the back side of lower placenta; Described upper location tire also comprises placenta, the upper limit plate, pole socket and depression bar, the end face of upper placenta is bolted on the upper holder block of forcing press, a square groove identical with upper placenta height is inwardly offered in the front center position of placenta on the edge, establishing the cross section in the square groove is square deck, it is pole socket, its width equals the width of square groove substantially, length is less than the degree of depth of square groove, best, pole socket is processed as cambered surface towards the positive side of upper placenta, offers screw-threaded counterbore downwards along the pole socket top center, and depression bar links to each other with pole socket by this screw-threaded counterbore, the upper end that is depression bar is fixed in the pole socket by interior jackscrew, the hardness HRC of above-mentioned depression bar 〉=50, best, the diameter of depression bar is less than the diameter 1mm of inner hole of workpiece, can guarantee like this when extruding, fully to contact with steel ball, again can be because of not upper, the deviation of lower placenta centering and injuring part; The limiting plate that can be the pole socket location is established in the front of placenta on described, i.e. upper limit plate, and this upper limit plate is bolted on the front of placenta;
Two, endoporus polishing: workpiece is inserted in the slotted eye I of workseat, adjust the position of workseat by adjusting bolt, make workpiece and depression bar coaxial line, then utilize lower limiting board and adjusting bolt that workseat is clamped, the starting pressure electromechanical source, with hardness HRC 〉=56, the steel ball of roughness Ra<0.025 is placed on the upper end open place of inner hole of workpiece, the diameter of this steel ball is greater than inner hole of workpiece diameter 0.02~0.03mm, best, the diameter of steel ball is greater than diameter of bore 0.03mm, the manual rocking bar of starting pressure machine then, and the upper holder block of forcing press presses down, upper holder block drives depression bar and presses down, depression bar is pressed into the endoporus of workpiece with steel ball, and steel ball passes inner hole of workpiece and drop through the slotted eye II lower end of workseat, then lifts manual rocking bar, take out workpiece, the endoporus polishing of workpiece is finished.
The present invention compared with prior art has following advantage:
1, the polishing of the endoporus of workpiece is finished by pressing steel balls under the depression bar, so the surface of inner hole of workpiece is very smooth, inner bore surface roughness can reach below the Rz2.0, and does not damage inner hole of workpiece, guarantees the quality of product;
2, simple to operate, quick, working (machining) efficiency is high, finishes an endoporus polishing and only needs 3 seconds, has greatly improved working (machining) efficiency;
3, finish at existing forcing press, adopt special-purpose mold, apparatus structure is simple, and is easy for installation, and maintenance is convenient;
4, reduce production costs, alleviate labor strength.
Description of drawingsFig. 1 is lower location of the present invention tire schematic top plan view.
Fig. 2 is that lower location tire master of the present invention looks schematic diagram.
Fig. 3 is the A-A view of Fig. 1.
Fig. 4 is upper location of the present invention tire schematic top plan view.
Fig. 5 is that upper location tire master of the present invention looks schematic diagram.
Fig. 6 is the A-A view of Fig. 4.
Fig. 7 is the connection diagram of mould of the present invention and forcing press.
Fig. 8 is that the master of workpiece looks generalized section.
Fig. 9 is the mold work view of embodiment 1.
The specific embodimentAt Fig. 1, in the schematic diagram of Fig. 2 and lower location tire shown in Figure 3, the bottom surface of lower placenta 1 is fixed on the workbench of forcing press by bolt 2, a square groove 3 identical with lower placenta height is inwardly offered in the front center position of placenta under the edge, establishing the cross section in the square groove is square deck, it is workseat 4, its width equals the width of square groove substantially, length is less than the degree of depth of square groove, workseat is processed as cambered surface towards the positive side of lower placenta, the circular slotted eye 5-1 of the opening upwards of inwardly offering along workseat end face center, the bottom of this slotted eye 5-1 is provided with coupled logical coaxial circular slotted eye 5-2, the diameter of slotted eye 5-2 is less than the diameter of slotted eye 5-1, and the lower ending opening of slotted eye 5-2 is located on the lower surface of workseat, the diameter of slotted eye 5-1 equals the external diameter of workpiece substantially, and the diameter of slotted eye 5-2 is greater than the diameter of inner hole of workpiece; Establish the limiting plate that can be the workseat location in the front of lower placenta, namely lower limiting board 6, and this lower limiting board is bolted on the front of lower placenta; The inside of lower placenta is provided with a adjusting bolt 7 that be used for to adjust lower placenta position, and this adjusting bolt is connected on the center line of lower placenta length direction and the workseat of an end in square groove, and the other end is towards the back side of lower placenta.
At Fig. 4, in the schematic diagram of Fig. 5 and upper location tire shown in Figure 6, the end face of upper placenta 8 is fixed on the upper holder block of forcing press by bolt 9, a square groove 10 identical with upper placenta height is inwardly offered in the front center position of placenta on the edge, establishing the cross section in the square groove is square deck, it is pole socket 11, its width equals the width of square groove substantially, length is less than the degree of depth of square groove, pole socket is processed as cambered surface towards the positive side of upper placenta, offer screw-threaded counterbore 12 downwards along the pole socket top center, depression bar 13 links to each other with pole socket by this screw-threaded counterbore, the upper end that is depression bar is fixed in the pole socket by interior jackscrew 14, the hardness HRC of above-mentioned depression bar 〉=50, the diameter of depression bar is less than the diameter 1mm of inner hole of workpiece, the limiting plate that can be the pole socket location is established in the front of placenta on described, and namely the upper limit plate 15, and this upper limit plate is bolted on the front of placenta.
As shown in Figure 7, lower location tire 16 is located on the workbench 18 of forcing press 17, and upper location tire 19 is located on the upper holder block 20 of forcing press.
Utilize above-mentioned polishing mould that inner hole of workpiece is polished below in conjunction with the specific embodiment explanation, such as Fig. 8 and shown in Figure 9,
Embodiment 1 is inserted into workpiece 21 in the slotted eye I of workseat 4, adjust the position of workseat by adjusting bolt, make workpiece and depression bar 13 coaxial lines, then utilize lower limiting board 6 and adjusting bolt that workseat is clamped, starting pressure machine 17 power supplys, with hardness HRC 〉=56, the steel ball 22 of roughness Ra<0.025 is placed on the upper end open place of inner hole of workpiece, the diameter of this steel ball is greater than inner hole of workpiece diameter 0.03mm, then the manual rocking bar 23 of starting pressure machine, the upper holder block 20 of forcing press presses down, upper holder block drives depression bar and presses down, depression bar is pressed into the endoporus of workpiece with steel ball, and steel ball passes inner hole of workpiece and drop through the slotted eye II lower end of workseat, then lifts manual rocking bar, take out workpiece, the endoporus polishing of workpiece is finished.

Claims (7)

1. the processing method of shaft-like workpiece inner hole extruding polishing, it is characterized in that: the bottom surface of lower placenta is fixed on the workbench of forcing press, a square groove identical with lower placenta height is inwardly offered in the front center position of placenta under the edge, establishing the cross section in the square groove is the square cross seat, its width equals the width of square groove, length is less than the degree of depth of square groove, the circular slotted eye I of the opening upwards of inwardly offering along workseat end face center, the bottom of this slotted eye I is provided with coupled logical coaxial circular slotted eye II, the diameter of slotted eye II is less than the diameter of slotted eye I, and the lower ending opening of slotted eye II is located on the lower surface of workseat; Limiting plate is set in the front of lower placenta; The inside of lower placenta is provided with adjusting bolt; The end face of upper placenta is fixed on the upper holder block of forcing press, a square groove identical with upper placenta height is inwardly offered in the front center position of placenta on the edge, establishing the cross section in the square groove is square pole socket, its width equals the width of square groove substantially, length is offered screw-threaded counterbore less than the degree of depth of square groove downwards along the pole socket top center, and depression bar links to each other with pole socket by this screw-threaded counterbore, the upper end that is depression bar is fixed in the pole socket by interior jackscrew, and the upper limit plate is established in the front of placenta on described; Workpiece is inserted in the slotted eye I of workseat, make workpiece and depression bar coaxial line, then workseat is clamped the starting pressure electromechanical source, steel ball is placed on the upper end open place of inner hole of workpiece, the diameter of this steel ball is greater than inner hole of workpiece diameter 0.02~0.03mm, and the upper holder block of forcing press presses down, and upper holder block drives depression bar and presses down, depression bar is pressed into steel ball the endoporus of workpiece, and steel ball passes inner hole of workpiece and drops through the slotted eye II lower end of workseat, takes out workpiece, and the endoporus polishing of workpiece is finished.
2. the processing method of shaft-like workpiece inner hole extruding according to claim 1 polishing, it is characterized in that: workseat is processed as cambered surface towards the positive side of lower placenta.
3. the processing method of shaft-like workpiece inner hole extruding according to claim 1 polishing, it is characterized in that: pole socket is processed as cambered surface towards the positive side of upper placenta.
4. the processing method of shaft-like workpiece inner hole extruding polishing according to claim 1 is characterized in that: the hardness HRC of steel ball 〉=56, roughness Ra<0.025.
5. the processing method of shaft-like workpiece inner hole extruding according to claim 1 polishing, it is characterized in that: the diameter of steel ball is greater than diameter of bore 0.03mm.
6. the processing method of shaft-like workpiece inner hole extruding polishing according to claim 1 is characterized in that: the hardness HRC of depression bar 〉=50.
7. the processing method of shaft-like workpiece inner hole extruding according to claim 1 polishing, it is characterized in that: the diameter of depression bar is less than the diameter 1mm of inner hole of workpiece.
CN2012103403132A 2012-09-14 2012-09-14 Method for extruding and polishing inner hole of shaft workpiece Pending CN102873633A (en)

Priority Applications (1)

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CN2012103403132A CN102873633A (en) 2012-09-14 2012-09-14 Method for extruding and polishing inner hole of shaft workpiece

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Application Number Priority Date Filing Date Title
CN2012103403132A CN102873633A (en) 2012-09-14 2012-09-14 Method for extruding and polishing inner hole of shaft workpiece

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CN102873633A true CN102873633A (en) 2013-01-16

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103433855A (en) * 2013-08-30 2013-12-11 孟轲 Hydraulic machine
CN103600288A (en) * 2013-10-17 2014-02-26 苏州好特斯模具有限公司 Device for processing flowing channel holes of flow-distribution plate
CN104588352A (en) * 2014-12-03 2015-05-06 大连德迈仕精密轴有限公司 Method for removing foreign matter in small-caliber deep hole of shaft part

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56119368A (en) * 1980-02-16 1981-09-18 Daido Kogyo Co Ltd Burnishing machine
US5339523A (en) * 1991-05-24 1994-08-23 Matsushita Electric Industrial Co., Ltd. Method of machining sleeve bearing
US5524464A (en) * 1993-09-30 1996-06-11 Matsushita Electric Industrial Co., Ltd. Workpiece-bore processing apparatus and method
US5651720A (en) * 1994-05-20 1997-07-29 Nsk Ltd. Bore size correcting apparatus
JP2000094318A (en) * 1998-09-18 2000-04-04 Nsk Ltd Ball burnishing device
JP2003205456A (en) * 2002-01-09 2003-07-22 Matsushita Electric Ind Co Ltd Bore machining method and ball burnishing device
CN102389907A (en) * 2011-11-18 2012-03-28 许晓华 Hole extruding device for steel balls

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56119368A (en) * 1980-02-16 1981-09-18 Daido Kogyo Co Ltd Burnishing machine
US5339523A (en) * 1991-05-24 1994-08-23 Matsushita Electric Industrial Co., Ltd. Method of machining sleeve bearing
US5524464A (en) * 1993-09-30 1996-06-11 Matsushita Electric Industrial Co., Ltd. Workpiece-bore processing apparatus and method
US5651720A (en) * 1994-05-20 1997-07-29 Nsk Ltd. Bore size correcting apparatus
JP2000094318A (en) * 1998-09-18 2000-04-04 Nsk Ltd Ball burnishing device
JP2003205456A (en) * 2002-01-09 2003-07-22 Matsushita Electric Ind Co Ltd Bore machining method and ball burnishing device
CN102389907A (en) * 2011-11-18 2012-03-28 许晓华 Hole extruding device for steel balls

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103433855A (en) * 2013-08-30 2013-12-11 孟轲 Hydraulic machine
CN103600288A (en) * 2013-10-17 2014-02-26 苏州好特斯模具有限公司 Device for processing flowing channel holes of flow-distribution plate
CN104588352A (en) * 2014-12-03 2015-05-06 大连德迈仕精密轴有限公司 Method for removing foreign matter in small-caliber deep hole of shaft part
CN104588352B (en) * 2014-12-03 2016-08-24 大连德迈仕精密轴有限公司 A kind of method removing axial workpiece small-caliber deep hole foreign body

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Application publication date: 20130116