CN201856102U

CN201856102U - Self-centering fixture

Info

Publication number: CN201856102U
Application number: CN201020592888XU
Authority: CN
Inventors: 曹健; 曹会杰; 张德武
Original assignee: SHANDONG PRECION GROUP CO Ltd
Current assignee: Dezhou Delong (Group) Machine Tool Co., Ltd.
Priority date: 2010-11-05
Filing date: 2010-11-05
Publication date: 2011-06-08
Anticipated expiration: 2020-11-05

Abstract

The utility model discloses a self-centering fixture which comprises a left V-shaped block, a right V-shaped block and a synchronous regulating mechanism, wherein the left V-shaped block is provided with a positively rightward V-shaped slot; the right V-shaped block is provided with a positively leftward V-shaped slot; and the synchronous regulating mechanism comprises a left sliding plate serving as a base of the left V-shaped block and a right sliding plate serving as a base of the right V-shaped block and is used for driving the left V-shaped block and the right V-shaped block to be synchronously closed to or separated from each other. The self-centering fixture has high positioning accuracy and is convenient to regulate.

Description

Self-centering fixture

Technical field

The utility model designs a kind of self-centering fixture, specifically relates to the self-centering fixture of the bar used on a kind of end face milling drill centers lathe.

Background technology

The present end face milling drill centers lathe sides that adopt are fixed more, the mode of one side compression is come clamping work pieces, what often cause locating is inaccurate, makes the center line of different-diameter workpiece not overlap, and then causes the axiality of the axis of workpiece two ends centre bore and cylindrical too big.

Summary of the invention

Therefore, the utility model is poor at present end face milling centre-hole machine anchor clamps positioning accuracy, and adjusts the defective of inconvenience, provides a kind of positioning accuracy height, self-centering fixture easy to adjust.

The technical solution adopted in the utility model is:

The utility model self-centering fixture, it comprises:

Left side V-block is provided with V-type groove just to the right;

Right V-block is provided with V-type groove just left; And

Synchronous adjusting mechanism comprises as the left skateboard of left V-block base with as the right slide plate of right V-block base, be used to drive left V-block and right V-block synchronously near or separate.

Self-centering fixture according to technical solutions of the utility model, adopted double V-shaped scheme that is oppositely arranged, characteristics based on the V-block accurate positioning, as long as can guarantee both synchronous near or away from, so for the workpiece that can feel relieved, diameter no matter, the center line of the workpiece of locating all can be on same straight line, error only limits to the driving error of synchronous adjusting mechanism, can satisfy positioning requirements fully, has high positioning accuracy.And it is adjusted, and mainly lean on the motion adjustment of synchronous adjusting mechanism, and known synchronous adjusting mechanism adjustment is all very convenient, more than the location of existing similar anchor clamps and the efficient height that steps up.

Above-mentioned self-centering fixture, the left skateboard of described synchronous adjusting mechanism and right slide plate are formed on the nut of order screw mechanism, and corresponding screw screw mechanism is positive left-hand thread T type screw screw mechanism.

Above-mentioned self-centering fixture also comprises the big slide plate that constitutes frame, and wherein left skateboard contacts with this big slide plate to cooperate with right slide plate and forms sliding pair.

Above-mentioned self-centering fixture also is furnished with the power part of described synchronous adjusting mechanism.

Above-mentioned self-centering fixture, described power part are hydraulic motor.

Above-mentioned self-centering fixture all is provided with dowel hole on described left slider and the right slide block, correspondingly, also is provided with dowel hole on described left V-block and the right V-block, is used for carrying out assembling and positioning by alignment pin.

Above-mentioned self-centering fixture between described left slider and left V-block, and is equipped with the adjusting pad of adjusting left V-block and right V-block relative altitude between right slide block and right V-block.

Description of drawings

Below in conjunction with Figure of description in detail the technical solution of the utility model being described in detail, is that those skilled in the art better understands the utility model, wherein:

Fig. 1 is the structural representation according to a kind of self-centering fixture of technical solutions of the utility model.

Among the figure: 1, hydraulic motor, 2, positive left-hand thread T type screw screw mechanism, 3, nut, 4, left skateboard, 5, adjusting pad, 6, alignment pin, 7, left V-block, 8, workpiece, 9, right V-block, 10, adjusting pad, 11, right slide plate, 12, nut, 13, big slide plate.

The specific embodiment

With reference to explanation accompanying drawing 1, it shows a kind of self-centering fixture, and it comprises:

Left side V-block 7 is provided with V-type groove just to the right;

Right V-block 9 is provided with V-type groove just left; And

Synchronous adjusting mechanism comprises as the left skateboard 4 of left V-block base with as the right slide plate 11 of right V-block base, be used to drive left V-block and right V-block synchronously near or separate.

The synchronous adjusting mechanism numerous types, simple poor slightly the catching class formation of precision of adjusting as flat thread driving commonly used on the chuck, two identical output gears of same besides input gear drive, two output gear branches occupy the both sides of input gear, inevitable switched in opposite, rotating speed is identical, just can finish linear drives in conjunction with tooth bar again.Having is exactly driven in synchronism by means of automatically controlled again, and it is easier to implement, as two servomotors of a control instruction control.

Preferably, the left skateboard of described synchronous adjusting mechanism and right slide plate are formed on the nut of order screw mechanism, and corresponding screw screw mechanism is positive left-hand thread T type screw screw mechanism 2, the screw screw mechanism has than higher transmission accuracy, under the higher specification requirement of positioning accuracy, preferably adopt this class mechanism.

In order to guarantee stability of transmission, also comprise the big slide plate 13 that constitutes frame, wherein left skateboard contacts with this big slide plate to cooperate with right slide plate and forms sliding pair.

Further, the power part of also being furnished with described synchronous adjusting mechanism.

Preferably, described power part is a hydraulic motor 1, drives steadily, and certain cushioning effect is arranged.

In order to guarantee better positioning accuracy, all be provided with dowel hole on described left slider and the right slide block, correspondingly, also be provided with dowel hole on described left V-block and the right V-block, be used for carrying out assembling and positioning by alignment pin 6.

Preferably, between described left slider and left V-block, and be equipped with the adjusting pad 10 of adjusting left V-block and right V-block relative altitude between right slide block and right V-block, can further improve positioning accuracy.

Claims

1. self-centering fixture is characterized in that it comprises:

Left side V-block (7) is provided with V-type groove just to the right;

Right V-block (9) is provided with V-type groove just left; And

Synchronous adjusting mechanism comprises as the left skateboard (4) of left V-block base with as the right slide plate (11) of right V-block base, be used to drive left V-block and right V-block synchronously near or separate.

2. self-centering fixture according to claim 1 is characterized in that: the left skateboard of described synchronous adjusting mechanism and right slide plate are formed on the nut of order screw mechanism, and corresponding screw screw mechanism is a positive left-hand thread T type screw screw mechanism (2).

3. self-centering fixture according to claim 2 is characterized in that: also comprise the big slide plate (13) that constitutes frame, wherein left skateboard contacts with this big slide plate to cooperate with right slide plate and forms sliding pair.

4. according to the arbitrary described self-centering fixture of claim 1 to 3, it is characterized in that: the power part of also being furnished with described synchronous adjusting mechanism.

5. self-centering fixture according to claim 4 is characterized in that: described power part is hydraulic motor (1).

6. self-centering fixture according to claim 4 is characterized in that: all be provided with dowel hole on described left slider and the right slide block, correspondingly, also be provided with dowel hole on described left V-block and the right V-block, be used for carrying out assembling and positioning by alignment pin (6).

7. self-centering fixture according to claim 6 is characterized in that: between described left slider and left V-block, and be equipped with the adjusting pad (10) of adjusting left V-block and right V-block relative altitude between right slide block and right V-block.