CN103341821B - The chucking method of special-shaped micro parts grinding and the clamp that is installed thereof - Google Patents

The chucking method of special-shaped micro parts grinding and the clamp that is installed thereof Download PDF

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Publication number
CN103341821B
CN103341821B CN201310268392.5A CN201310268392A CN103341821B CN 103341821 B CN103341821 B CN 103341821B CN 201310268392 A CN201310268392 A CN 201310268392A CN 103341821 B CN103341821 B CN 103341821B
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Prior art keywords
clamp
workpiece
pressing plate
elongated slot
clamp body
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CN201310268392.5A
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CN103341821A (en
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杜辰
张钧
王文春
安明
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Tianjin Zhongma Junteng Precision Machinery Manufacture Co Ltd
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Tianjin Zhongma Junteng Precision Machinery Manufacture Co Ltd
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Abstract

The present invention relates to a kind of chucking method of special-shaped micro parts grinding and the clamp that is installed thereof, it is characterized in that: concrete steps are as follows: preparation solidification mixture: make mixture after selecting paraffin 6-8 and rosin 1-3 to melt; Make the special clamp that is installed, the clamp that will be installed is preheated to 80 DEG C, is buckled one by one by workpiece to be placed on to be installed on clamp positioning table, compresses with pressing plate; In the clamp die cavity that is installed, pour solidification mixture in elongated slot, guarantee the effectively fixing of workpiece.Clamp comprises clamp body, pressing plate, alignment pin and hold-down bolt, and described clamp body is provided with die cavity along its longitudinal axis direction.Beneficial effect: it is fixing that workpiece adopts rosin to pour in clamp, and Workpiece fixing adopts and links work at selected spots with that in entire areas, and work-handling is convenient.Pressing plate workpiece pressing on clamp, the displacement of workpiece when avoiding rosin to pour into.

Description

The chucking method of special-shaped micro parts grinding and the clamp that is installed thereof
Technical field
The invention belongs to clamp, particularly relate to a kind of chucking method of special-shaped micro parts grinding and the clamp that is installed thereof.
Background technology
Sewing-machine foot is requisite parts in the feed mechanism of sewing machine, various multi-form sewing-machine foot plays very important effect in process of production, as for seizing open-wire line, implicit type slide fastener sewing machine special presser feet, pleating sewing-machine foot etc., selects different sewing-machine foots extremely important in different sewing operations.
Refer to shown in accompanying drawing 7, the large signature work in industrial sewing machine piano presser foot device is the vital part for Novel industrial sewing machine development.Pawn neat body size is long × wide is 33.4 × 11.2mm, and the dimensional accuracy of Each part and requirement on machining accuracy are all very high.Wherein baseplane required precision is thickness 2.0 ± 0.05, and the depth of parallelism is that 0.2/100 Geometrical Tolerance Principle is very high, and part to belong to abnormity little again, should not be installed.The key of processing profiled micro parts is the selection of datum level and the direction of clamping force.First problem solves well, selects the relative plane in 2 ± 0.05 dimensioned faces as datum level, and locating surface datum level being placed in fixture gets final product accurate positioning; As adopted mechanical means retaining element, clearly, the direction of clamping force can not perpendicular to surface to be ground; As two sides of Clamp blocks, when the perpendicularity of side and datum level is bad, will causes after clamping between part datum level and fixture locating surface and produce gap, cause scrapping of part.Therefore must research and develop a kind of special fixture and adopt special processing process, just can complete the flat surface grinding processing of this product.
Summary of the invention
The present invention is to overcome deficiency of the prior art, a kind of chucking method of special-shaped micro parts grinding and the clamp that is installed thereof are provided, elongated slot between the large upper seesaw giving as security work of utilization and machined surface opposite planar are as the clamp of locating, adopt rosin method for filling by Workpiece fixing, avoid the displacement of workpiece.Part can accurate positioning on clamp, and reliable clamping, realizes the flat surface grinding of special-shaped micro parts.
The present invention for achieving the above object, is achieved through the following technical solutions, and a kind of chucking method of special-shaped micro parts grinding, is characterized in that: concrete steps are as follows:
1) preparation solidification mixture: by weight, makes mixture after selecting paraffin 6-8 part and the fusing of rosin 1-3 part;
2) make the special clamp that is installed, the clamp that will be installed is preheated to 80 DEG C, is buckled one by one by workpiece to be placed on to be installed on clamp positioning table, compresses with pressing plate;
3) in elongated slot in the clamp die cavity that is installed, solidification mixture is poured, ensure solidification mixture perfusion to be installed clamp die cavity top time, the solidification mixture of cavity bottom does not also solidify, the internal stress that solidification mixture produces in the curing process can be decreased, guarantee the effectively fixing of workpiece.
The optimum proportioning of described solidification mixture is: by weight, paraffin: rosin 7.2:2.8.
A kind of clamp of special-shaped micro parts, it is characterized in that: comprise clamp body, pressing plate, alignment pin and hold-down bolt, described clamp body is provided with die cavity along its longitudinal axis direction, the positioning table of elongated slot and place work piece is provided with in described die cavity, vertically alignment pin is connected with in elongated slot, described clamp body is provided with the pressing plate of workpiece pressing, and described pressing plate is provided with hold-down bolt.
The elongated slot quantity at least three of described clamp body, wherein affixed alignment pin in an elongated slot.
Two alignment pins be parallel to each other in same plane are connected with in described elongated slot.
Described pressing plate shape of cross section is concave shape, described concave shape pressing plate two wall respectively by hinge screws and clamp body two side hinged, described pressing plate is bolted with several hold-down bolts on the same axis.
Described clamp body two side and hinge screws parallel position are provided with stop screw.
Beneficial effect: it is fixing that workpiece adopts rosin to pour in clamp, and Workpiece fixing adopts and links work at selected spots with that in entire areas, and work-handling is convenient.Pressing plate workpiece pressing on clamp, the displacement of workpiece when avoiding rosin to pour into.Clamp is provided with multiple workpiece station, can the multiple workpiece of time processing, improves work efficiency several times, after new product puts goods on the market, can make the annual new profit of enterprise more than 10 ten thousand yuan.
Accompanying drawing explanation
Fig. 1 is perspective view of the present invention;
Fig. 2 is front view of the present invention;
Fig. 3 is the top view of Fig. 2;
Workpiece pressing state reference map when Fig. 4 is perfusion rosin;
Fig. 5 is that rosin solidifies rear fender location status reference diagram;
Fig. 6 is the form and position tolerance mark schematic diagram of workpiece;
Fig. 7 is the stereogram of workpiece.
In figure: 1, clamp body, 2, pressing plate, 3, hold-down bolt, 4, alignment pin 5, hinge screws, 6, stop screw, 7, positioning table, 8, workpiece.
Detailed description of the invention
Below in conjunction with preferred embodiment, to according to detailed description of the invention provided by the invention, details are as follows:
Embodiment
Refer to Fig. 6,7, a kind of chucking method of special-shaped micro parts grinding, concrete steps are as follows:
1) preparation solidification mixture: by weight, makes mixture after selecting paraffin 6-8 part and the fusing of rosin 1-3 part;
2) make the special clamp that is installed, the clamp that will be installed is preheated to 80 DEG C, is buckled one by one by workpiece to be placed on to be installed on clamp positioning table, compresses with pressing plate;
3) in elongated slot in the clamp die cavity that is installed, solidification mixture is poured, ensure solidification mixture perfusion to be installed clamp die cavity top time, the solidification mixture of cavity bottom does not also solidify, the internal stress that solidification mixture produces in the curing process can be decreased, guarantee the effectively fixing of workpiece.
Paraffin is the one of refinery products, is the mixture of solid alkanes, does not have fixing fusing point, dissolves, dissolve in ether, benzene and some ester at 47 DEG C-64 DEG C.Rosin is made from rosin, pine torch and tall oil, is a kind of mixture of complexity, forms primarily of various diterpenoid resin acid, and softening point is at 70 DEG C-90 DEG C, and fusing point is at 110 DEG C-135 DEG C, and flash-point is at 216 DEG C.
In experiment, if applicant finds only to use paraffin, because paraffin hardness is lower, during grinding part, part has loosening phenomenon.Applicant mixes rosin in paraffin, and in the proportioning test of paraffin and rosin, we apply optimum seeking method, through repeatedly testing, determines paraffin 6-8 part and rosin 1-3 part composition solidification mixture.Wherein: 6 parts, paraffin and rosin 1 part, during grinding part, part still has loosening phenomenon; 8 parts, paraffin and rosin 3 parts, hardening time is short, and when mixture perfusion is to clamp type top of chamber, the mixture of cavity bottom has cured, and mixture creates internal stress in the curing process, and part fixed effect is bad.
The optimum proportioning of solidification mixture is: by weight, paraffin: rosin 7.2:2.8.When this ratio, the hardness after mixture solidification can the impulsive force of support part when being subject to grinding, part easier can be taken out from mixture again.
Refer to accompanying drawing 1-5, a kind of clamp adopting the special special-shaped micro parts of said method, comprise clamp body 1, pressing plate 2, alignment pin 4 and hold-down bolt 3, described clamp body is provided with die cavity along its longitudinal axis direction, elongated slot is provided with in described die cavity, rosin liquid is poured in elongated slot, positioning table 7 can put grinding face opposite planar, vertically alignment pin is connected with in elongated slot, alignment pin is arranged in the dowel hole of clamp body, be interference fit with dowel hole, be connected firmly, reliably.Elongated slot sliding fit on described alignment pin and workpiece between seesaw.Described clamp body is provided with the pressing plate of workpiece pressing, and described pressing plate is provided with hold-down bolt.According to shape and the design feature of workpiece, the elongated slot quantity at least three of described clamp body is set, wherein fixed locating stud in an elongated slot.Refer to the workpiece of Fig. 6, pressing plate was fallen → with the locating table of clamp and alignment pin, workpiece is accurately positioned on clamp, → to rotate pressing plate above workpiece → screw hold-down bolt → clamping work pieces → perfusion rosin liquid → cooling rosin liquid to make it become solid state rosin → guarantee workpiece to be fixed → unclamp hold-down bolt → by pressing plate by solid rosin and to fall → start flat surface grinding → completion of processing → knock workpiece with rubber hammer to make workpiece loosen → take out workpiece → with "painted-face" character in opera to knock rosin in clamp, rosin is made to depart from clamp inner surface → cleaned out by the rosin of clamp die cavity (locating surface and the alignment pin of clamp are necessarily cleaned out) → put into workpiece to enter next fabrication cycles.
Preferred version of the present invention is, is connected with two alignment pins be parallel to each other in same plane in described elongated slot, and alignment pin inserts the elongated slot on workpiece between seesaw, positions.Described pressing plate shape of cross section is concave shape, and described concave shape pressing plate two wall is hinged respectively by hinge screws 5 and clamp body two side, and described pressing plate is bolted with several hold-down bolts on the same axis, can the multiple workpiece of time processing.Pressing plate is arranged on clamp body by hinge screws, can rotate around hinge screws, is able to use hold-down bolt workpiece pressing when pouring into rosin, by the rosin liquid flowed, workpiece is not washed from correct Working position.
Preferred version of the present invention is, described clamp body two side and hinge screws parallel position are provided with stop screw 6, and when pressing plate is opened, limited screw blocks.Stop screw 6 is arranged on clamp body, and its effect does not make pressing plate excessively swing, and makes operating personnel operate clamp convenient.
This fixture has locating surface and alignment pin to be used for locating element; There is a die cavity for pouring into mixture, after part locates on fixture, fixture is preheated to about 80 DEG C, when ensureing mixture perfusion to clamp type top of chamber, the mixture of cavity bottom does not solidify, decrease the internal stress that mixture produces in the curing process, make the better effects if of mixture retaining element.
The above is only preferred embodiment of the present invention, not does any pro forma restriction to structure of the present invention.Every above embodiment is done according to technical spirit of the present invention any simple modification, equivalent variations and modification, all still belong in the scope of technical scheme of the present invention.

Claims (3)

1. the clamp of a special-shaped micro parts, it is characterized in that: comprise clamp body, pressing plate, alignment pin and hold-down bolt, described clamp body is provided with die cavity along its longitudinal axis direction, the positioning table of elongated slot and place work piece is provided with in described die cavity, positioning table can put grinding face opposite planar, vertically alignment pin is connected with in elongated slot, alignment pin is arranged in the dowel hole of clamp body, be interference fit with dowel hole, rosin liquid is poured in elongated slot, elongated slot sliding fit on described alignment pin and workpiece between seesaw, described clamp body is provided with the pressing plate of workpiece pressing, described pressing plate is provided with hold-down bolt, the elongated slot quantity at least three of described clamp body, wherein affixed alignment pin in an elongated slot, affixed two alignment pins be parallel to each other in same plane in described elongated slot.
2. the clamp of special-shaped micro parts according to claim 1, it is characterized in that: described pressing plate shape of cross section is concave shape, described concave shape pressing plate two wall respectively by hinge screws and clamp body two side hinged, described pressing plate is bolted with several hold-down bolts on the same axis.
3. the clamp of special-shaped micro parts according to claim 1, is characterized in that: described clamp body two side and hinge screws parallel position are provided with stop screw.
CN201310268392.5A 2013-06-28 2013-06-28 The chucking method of special-shaped micro parts grinding and the clamp that is installed thereof Active CN103341821B (en)

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CN103341821B true CN103341821B (en) 2016-02-03

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62188637A (en) * 1986-02-13 1987-08-18 Matsushita Electric Ind Co Ltd Machining jig for accurate parts
CN102294612A (en) * 2010-06-28 2011-12-28 芜湖航天汽车连杆有限公司 Clamp for side face processing of big end of connecting rod
CN202726531U (en) * 2012-06-25 2013-02-13 天津市中马骏腾精密机械制造有限公司 Machining clamping apparatus of industrial sewing machine free press element
CN102941628A (en) * 2012-07-31 2013-02-27 南通皋鑫电子股份有限公司 Diode silicon stack cutting process and special tool thereof
CN202985402U (en) * 2012-11-21 2013-06-12 株洲南方燃气轮机成套制造安装有限公司 Clamp for wax filling of rotor of gas compressor
CN203426850U (en) * 2013-06-28 2014-02-12 天津市中马骏腾精密机械制造有限公司 Grinding clamp for specially-shaped tiny parts
CN104249294A (en) * 2013-06-28 2014-12-31 天津市中马骏腾精密机械制造有限公司 Grinding clamp for special-shaped tiny parts

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62188637A (en) * 1986-02-13 1987-08-18 Matsushita Electric Ind Co Ltd Machining jig for accurate parts
CN102294612A (en) * 2010-06-28 2011-12-28 芜湖航天汽车连杆有限公司 Clamp for side face processing of big end of connecting rod
CN202726531U (en) * 2012-06-25 2013-02-13 天津市中马骏腾精密机械制造有限公司 Machining clamping apparatus of industrial sewing machine free press element
CN102941628A (en) * 2012-07-31 2013-02-27 南通皋鑫电子股份有限公司 Diode silicon stack cutting process and special tool thereof
CN202985402U (en) * 2012-11-21 2013-06-12 株洲南方燃气轮机成套制造安装有限公司 Clamp for wax filling of rotor of gas compressor
CN203426850U (en) * 2013-06-28 2014-02-12 天津市中马骏腾精密机械制造有限公司 Grinding clamp for specially-shaped tiny parts
CN104249294A (en) * 2013-06-28 2014-12-31 天津市中马骏腾精密机械制造有限公司 Grinding clamp for special-shaped tiny parts

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