CN2132591Y - Bistrique - Google Patents

Abstract

The utility model discloses a grinding clamp device used for processing gemstones, which is improved on the foundation of an original bistrique. V-shaped groove graduation and straight type locating bar graduation are adopted in the utility model, which makes the graduation accurate. Methods of locating bar reverse direction free positioning and fixing a copper sleeve to a shaft bar are adopted, which overcomes return-to-zero errors, and enlarges the minimum graduation scope of a multiple corners dish. The flange of the multiple corners disk is designed to be higher than a graduation disk, and a gemstone with a very small angle can be processed. Grooves are processed out at the surface of each edge of the multiple corners disk, variable line contact is changed into approximate two-point contact, and stability is not easy to be lost in the process of long-term usage. The utility model can be widely used for gemstone processing industries.

Description

Bistrique

The utility model relates to the grinding jig that a kind of gem processing is used.

At present, normally used Bistrique in the gem processing industry all is to punch on index dial, and the backstay that has 90 ° of crotches with an end inserts in the hole and carries out calibration.This Bistrique exists following shortcoming (referring to accompanying drawing 1): 1, since on the index dial hole axle of hole and backstay be combined with the gap, have looseningly during calibration, cause the error of division, especially more obvious when polishing process.2, the calibration minimum of former polygonal dish is 360 °/polygonal Pan Jiao number * index dial hole count, need change a certain angle if add man-hour, when just finely tuning, must regulate the screw that is fixed on polygonal dish and the index dial, change the relative position of index dial and polygonal dish.When polishing, if index dial can not accurately playback, promptly zero error just causes grinding plane and surface polishing not to overlap like this.Accomplish not too easily and require index dial accurately to playback.3, add man-hour, polygonal dish is that line contacts with work top, works long hours, and straight line will be caused that by rounding contact is unstable.4, because the index dial plane is concordant with polygonal dish flange, and when grinding low-angle jewel, outstanding backstay will be run into work top, hinder processing.

The purpose of this utility model provides a kind ofly can process arbitrarily angledly, and does not have zero error, and calibration is Bistrique accurately.

For achieving the above object, the utility model has been taked following design: a kind of Bistrique, it comprises: an axostylus axostyle, the one end is equipped with binding nut.A copper sheathing can be enclosed within on the described axostylus axostyle rotationally.A spring is enclosed within on the described axostylus axostyle, and the one end contacts with described copper sheathing.A nut compresses described spring, and is screwed on the described axostylus axostyle.A polygonal dish that has recessed circle is enclosed within on the described copper sheathing.An index dial, in the recessed circle of the described polygonal dish of packing into, and fastening by screw and described polygonal dish.A backstay is fixed on the described axostylus axostyle by jackscrew.It is characterized in that: described backstay is a straight-bar.Have screw on the described copper sheathing, the screw that described copper sheathing can be fixed on the described axostylus axostyle is installed in this screw.The recessed round degree of depth of described polygonal dish surpasses the thickness of described index dial, all has groove in the plane on each limit of described polygonal dish.Have the circle bulge loop coaxial on the card of described index dial, on described bulge loop, have 4-12 V-type groove with described index dial.

In order to make backstay when fine setting is oppositely used, calibration is convenient, and it is conical that an end of backstay is.

The utility model makes calibration accurate owing to adopt V-type groove and straight-bar type backstay calibration; Owing to adopted with the reverse arbitrarily location and copper sheathing is fixed on method on the axostylus axostyle of backstay, overcome zero error, enlarged the scope of the minimum calibration of polygonal dish; Owing to adopt the flange of polygonal dish to be higher than the design of index dial, can process very low-angle jewel simultaneously; Process groove in addition on the plane on each limit of polygonal dish, the modified line contact is used not loses stability for a long time for approximate 2 contacts.

Below in conjunction with accompanying drawing embodiment of the present utility model is elaborated.

Accompanying drawing 1 is original Bistrique structural representation

Accompanying drawing 2 is the utility model structural representations

Accompanying drawing 3 is polygonal dish of the utility model and index dial structural representation

As described in Figure 2, at an end of axostylus axostyle 7 binding nut 8 that clamps processed jewel extension bar is installed.Near axostylus axostyle 7 shaft shoulder places, open a radial hole, insert a backstay 10, make backstay 10 1 ends long, an end is short, and a short end is processed a circular cone, and is on axostylus axostyle 7 that backstay 10 is fixing with jackscrew 11.

Shown in Fig. 3, each face of anistree dish 5 all processes a groove 16, and groove 16 can be an arc also, so that reduce the line contact length of each face and workbench, makes it be approximately 2 contacts, uses not loses stability for a long time.Open a recessed circle 12 coaxially on the anistree dish 5.Not as opening eight holes in the prior art on the index dial 6, but bulge loop 14 on index dial 6, processing, then by common grading method, mark eight reticules 17, be the center with reticule 17 respectively, do not opening on that section bulge loop 14 ' beyond the V-type groove 15 opening eight V-type grooves 15 on the bulge loop 14, the height of bulge loop 14 is being reduced.This is after considering that backstay 10 is put into the V-type groove, also keep certain distance with card, when the needs arbitrary indexing, backstay 10 is a conical end aims at the position of wanting calibration, do not correct to turn over and be placed on the shorter bulge loop 14 ' with one of circular cone, keep index dial 6 centers constant, precision machining to the distance between the jewel.Index dial 6 is put into anistree 5 the recessed circle 12 that coils, with screw 9 that both are fastening.Then the anise dish is fixed on (as shown in Figure 2) on the copper sheathing 3.Copper sheathing 3 is enclosed within on the axostylus axostyle 7 versatilely, and on copper sheathing 3, opens a screw 13.When the backstay inverted orientation, screw 4 is screwed in the screw 13, make index dial 6 keep relative motionless with axostylus axostyle 7.Spring 2 of cover on axostylus axostyle 7, spring 2 one ends lean against on the copper sheathing 3, and the other end compresses with nut 1, and nut 1 is screwed on the axostylus axostyle 7.

In the foregoing description, anistree dish 5 also can be that the V-type groove 15 on four jiaos of dishes, five jiaos of dishes, wince, the index dial 6 also can be four, nine, 12.

In the time of operation, axostylus axostyle is pulled out from index dial, backstay is put into the V-type groove of wanting calibration.Unclamp axostylus axostyle, under the effect of spring, axostylus axostyle withdrawal index dial.Under the effect of V-type groove and spring, index dial and axostylus axostyle keep relative fixed, calibration exactly.When needs change working grading numerical value, backstay can be transferred and come, an end that will be circular cone is aimed at the position of wanting calibration.With the screw-driving on the copper sheathing, make index dial and axostylus axostyle relative fixed, also accurate calibration.Because the relative position of index dial and polygonal dish does not change, as long as unclamp the screw on the copper sheathing, backstay can reset, and does not have zero error.

Claims (2)

1, a kind of Bistrique, it comprises:

An axostylus axostyle 7, the one end is equipped with binding nut 8,

A copper sheathing 3 can be enclosed within on the described axostylus axostyle 7 rotationally,

A spring 2 is enclosed within on the described axostylus axostyle 7, and the one end contacts with described copper sheathing 3,

A nut 1 compresses described spring 2, and is screwed on the described axostylus axostyle 7,

A polygonal dish 5 that has recessed circle 12 is enclosed within on the described copper sheathing 3,

An index dial 6, in the recessed circle 12 of the described polygonal dish 5 of packing into, and fastening by screw 9 and described polygonal dish 5,

A backstay 10 is fixed on the described axostylus axostyle 7 by jackscrew 11,

It is characterized in that:

Described backstay 10 is straight-bars

Have screw 13 on the described copper sheathing 3, the screw 4 that described copper sheathing 3 can be fixed on the described axostylus axostyle 7 be installed in this screw 13,

Recessed circle 12 degree of depth of described polygonal dish 5 surpass the thickness of described index dial 6, all have groove 16 in the plane on described polygonal dish 5 each limit.

Have a circle and described index dial 6 coaxial bulge loops 14 on the card of described index dial 6 and on described bulge loop 14, have 4-12 V-type groove 15.

2, Bistrique as claimed in claim 1 is characterized in that: backstay 10 short ends wherein are conical.

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