CN209902719U - A fixture for fixing square eccentric parts for lathes - Google Patents

Abstract

The utility model discloses a fixture for fixing a square eccentric part of a lathe, comprising: a circular base plate, two reference fasteners, two movable fasteners, and two wedge-shaped fasteners, wherein the circular There are two T-slots that are perpendicular to each other and pass through the center of the circular base plate; the bottoms of the reference fasteners and movable fasteners are bolted to connect the T-shaped blocks that fit the T-slots. ; The movable fastener is provided with an inclined surface adapted to the wedge-shaped fastener. Therefore, the fixture for fixing the square eccentric part of the lathe of the present invention can conveniently, quickly and accurately locate the square eccentric workpiece; by using the wedge-shaped fastener, the workpiece to be processed can be easily fastened with a large force, without the need for a lathe The thimble is pressed, which reduces the positioning and clamping time and improves the processing efficiency.

Description

A fixture for fixing square eccentric parts for lathes

technical field

The utility model relates to the field of lathe clamps, in particular to a clamp used for fixing a square eccentric part of a lathe.

Background technique

In the machining process, it is often encountered that a round hole is processed on a square workpiece. If the round hole is in the center of the square workpiece, it can be directly processed with a traditional lathe fixture, but if the round hole needs to be processed If it is an eccentric circle and is not in the center of the square workpiece, after it is directly clamped by a traditional lathe fixture, the center of the circle to be processed is not on the same axis as the machining axis of the lathe, so it cannot be processed.

The Chinese patent with the application number of 201420033007.9 provides a fixture for clamping square workpieces, including a three-jaw chuck, a jaw seat, and a chuck wrench seat. The upper jaw seat is connected to a middle jaw with a flat bottom surface. , the lower two jaw seats are respectively connected to a left and right jaw with a right angle clamping surface, and the center of the circular hole of the workpiece coincides with the center of the chuck. The square workpiece is clamped on the lathe by the left and right right-angle jaws and the middle jaw with a flat bottom surface, and the center of the round hole to be processed is coincident with the center of the chuck, and the eccentric hole (or Non-eccentric hole) processing without the need to convert other lathes, but there are the following problems. The jaws that fix the workpiece are fixed on the jaw seat of the three-jaw chuck. According to the design principle of the three-jaw chuck, the three jaws It will act at the same time, and the fixture is fixed on the lathe and is generally placed in a vertical state. Therefore, it will be very difficult to align the center of the eccentric hole on the workpiece with the center of the chuck, and then consider the deviation of the size of the square workpiece itself. , every time it needs to be adjusted online to align the center of the eccentric hole with the center of the chuck, which will greatly increase the difficulty of the worker's work.

The Chinese patent with the application number of 201220743725.6 provides a lathe round centering fixture, the fixture includes a circular clamping plate, four square holes are opened on two mutually perpendicular diameter lines of the clamping plate, and a screw rod is also arranged in the square hole , and fixed by a nut; the diameter of the screw rod matches the width of the square hole. Through the adjustment of the position of the screw and the nut, it can adapt to the workpieces of different sizes, realize the function of turning the eccentric circle, and reduce the work of frequently getting up and down the chuck of the lathe. There are the following problems: the tightening of the workpiece only depends on the clamping force of the screw and the nut on the workpiece. This clamping force depends on the physical strength of the staff, so it can only form the positioning of the workpiece, and it is necessary to use the jack of the lathe. The real tightening can only be achieved by pressing the workpiece, and this patent cannot be applied to the workpiece that cannot be pressed by the thimble.

Utility model content

The technical problem to be solved by the utility model is: how to quickly locate and fix the square eccentric workpiece.

In order to solve the above-mentioned technical problems, the technical scheme adopted by the present utility model is:

A fixture for fixing a square eccentric piece for a lathe, characterized by comprising: a circular base plate, two reference fasteners, two movable fasteners, and two wedge-shaped fasteners, wherein,

The circular bottom plate is provided with two T-shaped grooves that are perpendicular to each other and pass through the center of the circular bottom plate;

The bottoms of the reference fasteners and movable fasteners are provided with protrusions adapted to the T-shaped grooves, and the T-shaped blocks adapted to the T-shaped grooves are connected by bolts;

The movable fastener is provided with an inclined surface adapted to the wedge-shaped fastener.

On the basis of the above technical solutions, the utility model can also be improved as follows.

Preferably, the height of the wedge-shaped fastener is less than the height of the movable fastener.

Preferably, the height of the reference fastener, the height of the movable fastener, and the height of the wedge fastener are smaller than the height of the workpiece to be processed.

Compared with the prior art, the utility model has the following technical effects:

1. Since multiple fasteners will not act at the same time, it is convenient to quickly and accurately locate the square eccentric workpiece;

2. The use of wedge-shaped fasteners can easily achieve high-strength tightening of the workpiece to be processed, without the need to press the lathe thimble, which reduces the positioning and clamping time and improves the processing efficiency.

Description of drawings

Fig. 1 is the top-view structure schematic diagram of the fixture used for fixing the square eccentric part of the lathe according to the present invention;

2 is a schematic front view of the structure of a fixture for fixing a square eccentric part of a lathe according to the present invention;

3 is a schematic diagram of the use of a fixture for fixing a square eccentric part of a lathe according to the present invention;

In the accompanying drawings, the list of component names represented by each number is as follows:

1. Benchmark fasteners;

2. Active fasteners;

3. Wedge-shaped fasteners;

4. Round bottom plate;

5. Bolts;

6. T-block;

7. T-slot;

8. The workpiece to be processed.

Note that there are a total of 10 bolts in the picture, only one is labeled.

Detailed ways

The principles and features of the present invention will be described below with reference to the accompanying drawings, and the examples are only used to explain the present invention, and are not intended to limit the scope of the present invention.

Please refer to Fig. 1-Fig. 3, the fixture for fixing the square eccentric part of the lathe includes: a circular base plate 4, two reference fasteners 1, two movable fasteners 2, and two wedge-shaped fasteners Piece 3, of which,

The circular bottom plate 4 is provided with two T-slots 7 that are perpendicular to each other and pass through the center of the circular bottom plate 4;

The bottoms of the reference fasteners 1 and movable fasteners 2 are provided with protrusions adapted to the T-slots 7, which are embedded in the upper end of the T-slots 7 to prevent the reference fasteners 1 and the movable fasteners. The rotation of the fastener 2 affects the tightening effect; the reference fastener 1 and the movable fastener 2 are connected by bolts 5 to the T-shaped block 6 arranged in the T-shaped groove 7 and adapted to the T-shaped groove 7; by tightening The bolts 5 can firmly fix the reference fastener 1 and the movable fastener 2 on the T-slot 7 .

The movable fastener 2 is provided with an inclined surface adapted to the wedge-shaped fastener 3 .

Preferably, the height of the wedge-shaped fastener 3 is smaller than the height of the movable fastener 2 .

Preferably, the height of the reference fastener 1 , the height of the movable fastener 2 , and the height of the wedge-shaped fastener 3 are smaller than the height of the workpiece 8 to be processed.

when using it,

The first step is to use the three-jaw chuck of the lathe to fix the circular base plate 4;

The second step is to locate the two reference fasteners 1 according to the eccentric size of the workpiece to be processed, tighten the bolts 5, and fix the two reference fasteners 1 in the T-slot 7, thereby completing the workpiece 8 to be processed. datum positioning;

In the third step, place the two movable fasteners 2 close to the workpiece 8 to be processed, tighten the bolts 5 and fix them in the T-slot 7, and align the inclined surface of the wedge-shaped fastener 3 with the inclined surface of the movable fastener 2, and then use Rotate the bolt 5, and press down the wedge-shaped fastener 3 by the force of the bolt 5, so as to realize the purpose of fixing the workpiece 8 to be processed;

The fixture for fixing the square eccentric part of the lathe of the utility model can conveniently and quickly and accurately locate the square eccentric workpiece; by using the wedge-shaped fastener, the workpiece to be processed can be easily fastened with great force, and there is no need to press the thimble of the lathe again. , reducing the positioning and clamping time and improving the processing efficiency.

The above are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the present invention. within the scope of protection of the utility model.

Claims (3)

1. A fixture for fixing a square eccentric part of a lathe, characterized in that it comprises: a circular base plate, two reference fasteners, two movable fasteners, and two wedge fasteners, wherein, The circular bottom plate is provided with two T-shaped grooves that are perpendicular to each other and pass through the center of the circular bottom plate; The bottoms of the reference fasteners and movable fasteners are provided with protrusions adapted to the T-shaped grooves, and the T-shaped blocks adapted to the T-shaped grooves are connected by bolts; The movable fastener is provided with an inclined surface adapted to the wedge-shaped fastener. 2 . The fixture for fixing a square eccentric part of a lathe according to claim 1 , wherein the height of the wedge-shaped fastener is smaller than the height of the movable fastener. 3 . 3. The fixture for fixing a square eccentric part of a lathe according to claim 1 or 2, wherein the height of the reference fastener, the height of the movable fastener, the wedge fastener The height is less than the height of the workpiece to be processed.

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