CN2190533Y

CN2190533Y - Spring expanding strip for cutting gear

Info

Publication number: CN2190533Y
Application number: CN 94209425
Authority: CN
Inventors: 盘建纲
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-04-25
Filing date: 1994-04-25
Publication date: 1995-03-01
Anticipated expiration: 2004-04-25

Abstract

The utility model provides a spring expanding strip for an acetabuliform cutting gear. The utility model has the advantages of high precision and long service life. The utility model is provided with a plurality of shallow slots. The utility model comprises an upper strip and a lower strip which can be separated, wherein, the upper strip and the lower strip are milled with a plurality of shallow slots and are reserved with definite wall thickness, and the upper strip and the lower strip are not thoroughly milled. When the upper strip and the lower strip of the spring expanding strip are naturally buckled, a clearance limit for preventing empty clamp is reserved in the center of the inner part, which can avoid the phenomenon that the spring expanding strip is discarded because of the empty clamp. Thus, the machining accuracy can be ensured. The utility model has the advantages of easy fabrication and low cost. In addition, the process for pouring gum can be cancelled.

Description

Spring expanding strip for cutting gear

The utility model relates to a kind of jig.

The during fabrication methods that adopt fluting of the bloated sheet of spring commonly used at present to be able to the purpose of breathing more.But because fluting has brought various disadvantages: bloated sheet iron filings foreign material at work easily enters in the groove, causes the anchor clamps precision to wander away, and it is dumb to move.The someone adopted the way of irritating rubber in groove afterwards, but still had several fatal weakness: 1〉its no insurance measure, fear empty folder, and often cause the sheet that expands to scrap because of operating personnel or maintenance personal's inadvertent; 2〉the bloated sheet of this spring connects by rubber between the sheet up and down, causes interior force unbalance in clamping is moved, and influences the precision of part to be processed; 3〉process for filling colloid into complexity, the cost costliness.

The dish-shaped cutting that the purpose of this utility model provides a kind of precision height, long service life and has some shallow slots is with the spring sheet that expands.

The utility model is the bloated chip architecture of being made by spring steel of disk spring, is divided into sheet under bloated sheet last slice of separable spring and the bloated sheet of spring.Milling out several shallow slots on the sheet up and down, but keeping certain wall thickness, do not milling; Both avoid the iron filings foreign material to enter the bloated sheet inside of spring, guaranteed the strain in the rigidity condition allowed band again.In using the utility model process, when the sheet that expands was subjected to from axial pressure, (two snap together up and down) allowed the thin-walled position along the circumferential direction stretch earlier, reaches the purpose of distending then in diametric(al); Also having a square groove that mills on the two bloated sheets up and down, the sheet that guarantees to expand has flexible leeway when circumferencial direction stretches.The sheet inside of expanding up and down is telescopic engagement, and sheet has a limited step under the sheet that expands, and when expand two when fastening naturally up and down of sheets of spring, inside center partly leaves an air defense and presss from both sides clearance limit.

According to the utility model that technique scheme realizes, it has following several advantage:

1〉can prevent empty folder and the phenomenon that causes the sheet that expands to scrap.

2〉the axiality height of two engagements up and down guarantees machining accuracy.

3〉the not method of saturating groove is opened in employing, has avoided the iron filings foreign material to enter in the groove, has improved machining accuracy.

4〉make simply, can save process for filling colloid into, with low cost.

Now be described in detail as follows for an embodiment and conjunction with figs.:

Fig. 1 is the outward appearance front view of the utility model one embodiment;

Fig. 2 is the outward appearance vertical view of the utility model one embodiment.

See also Fig. 1, Fig. 2, the two-dot chain line part is marked among the figure small piston rod (3), big piston bar (2), piston (5) all belong to the lathe part; Processed tooth embryo (12) belongs to the workpiece part.The bloated sheet of whole disk spring is made up of sheet (4) under bloated sheet last slice (1) of spring and the bloated sheet of spring.Spring expands and has several shallow slots (6) and a square groove (10) on sheet last slice (1) and the following sheet (4), and spring expands, and two (1), (4) center are provided with the centre bore (13) that passes through for piston rod to sheet up and down; Sheet (1), (4) contacted core have axiality locating surface (9) about spring expands sheet, and sheet (4) has a limited step (7) under the bloated sheet of spring, have an air defense folder clearance limit (8) when sheet freely meshes up and down; Be provided with the working face (11) of the bloated sheet of spring in addition.

When piston (5) under the effect of lathe oil pressure, drive big piston bar (2) when axis direction moves downward by small piston rod (3), expand sheet last slice (1) and following sheet (4) of spring is subjected to from axial pressure, cause the sheet that expands to swell, by producing the purpose that big frictional force reaches the processed tooth embryo of clamping (12) because of compressing between working face (11) and the workpiece (12) along diametric(al).When big piston bar (2) when moving upward, act on the pressure that spring expands on the sheet and fade away, the sheet that expands returns to free state under the effect of self elastic force, thereby unclamps workpiece to be machined.

When empty folder takes place when, the expand core of sheet last slice (1) of spring touches the expand limited step (7) of sheet (4) under the sheet of spring, trend that sheet last slice (1) moves downward stops and spring is expanded, having prevented that bloated sheet is unconfined radially swells, thereby has avoided anchor clamps owing to scrapping that the work carelessness causes.

Claims

1, a kind of novel cutting to be with the spring sheet that expands, and is interlocked and formed by separable spring sheet last slice and the spring sheet that expands under the sheet that expands, and it is shaped as dish, is provided with consistent centre bore in two centers of expanding sheets up and down; It is characterized in that: the central hole of sheet is provided with limited step and axiality locating surface under spring expands sheet, and upper and lower two expand is equipped with several shallow slots and a square groove on the sheets, and upper and lower is provided with an antiaircraft clearance limit that presss from both sides when freely mesh.

2, a kind of novel cutting according to claim 1 is characterized by with the spring sheet that expands: several shallow slots that mill out on sheet up and down remain with corresponding wall thickness, do not mill, to guarantee the strain in the rigidity condition allowed band.