CN103111889A - Multi-point flexible fixture - Google Patents

Abstract

The invention discloses a multi-point flexible fixture. The multi-point flexible fixture comprises base seat, a drive part, and a clamping part. The drive part is mainly composed of a guiding nut, a lead screw handle, and a lead screw. The clamping part is mainly composed of a fixed base seat, a moving base seat, and two clamping boxes. The fixed base seat is fixed on the base seat. The moving base seat is arranged on the base seat and is fixedly connected with the guiding nut. The two clamping boxes are respectively installed on the fixed base seat and the moving base seat. Each clamping box comprises a box body, wherein a front end face of the box body is opened, the back end face of the box body is provided with an air hole, a plurality of rows of fixture sheet layers are placed inside the box body and penetrate through the front end face of the box body, the fixture sheet layers are limited by a limiting block, each fixture sheet layer is formed by multiple frontal fixture sheets and multiple reversed fixture sheets being overlaid at intervals in sequence, and a positioning locking nut and a plurality of adjusting locking nuts are used for locking. The multi-point flexible fixture is simple in structure, and easy to operate. Besides, the multi-point flexible fixture can be used for clamping various complex parts quickly and efficiently, and has a good application prospect.

Description

Multi-point flexible fixture

technical field

The invention belongs to the field of clamp clamping technology, in particular to a multi-point flexible clamp device.

Background technique

The aviation industry is a concentrated expression of a country's industrial strength. In this field, cutting-edge technologies in various fields are concentrated. Its continuous development will promote the development of new materials, new processes and advanced manufacturing technologies. For this reason, the country is vigorously developing the aviation industry at this stage, and at the same time many technical and equipment problems that plague its development need to be resolved urgently.

Aircraft manufacturing has the characteristics of large size, complex shape and variety of parts, strict aerodynamic shape and high processing precision. At present, with the development of digital manufacturing technology in my country and breakthroughs in high-end CNC machine tool technology, machined parts have achieved full digital integrated manufacturing, but complex parts are difficult to use traditional fixtures due to their high flexibility, so it is difficult to achieve full digitalization flexible manufacturing. Major domestic aviation groups mainly use traditional analog quantity work methods such as mold line templates, and use profiling frames to fix complex parts for subsequent machining, which greatly increases the preparation cycle and cost of aircraft manufacturing. With the increase of machine types, its fixtures also occupy a large amount of management resources and inventory area of the enterprise. Therefore, the clamping and manufacturing of complex parts has become the bottleneck of digital manufacturing and assembly of the whole aircraft. In addition, the same technical difficulties also exist in the manufacturing process of ships and trains.

Contents of the invention

The object of the present invention is to provide a multi-point flexible fixture for the technical status quo in the manufacturing process of the above-mentioned complex parts, which can realize the clamping of complex parts of different sizes and shapes.

The technical solution adopted by the present invention to achieve the above technical purpose is: a multi-point flexible clamp, which includes a base, a driving part and a clamping part, wherein the driving part is mainly composed of a guide nut, a screw handle and a screw, and the clamping The part is mainly composed of a fixed base, a mobile base and two clamping boxes; the base is a hollow box with a screw hole on one side and a guide groove on the top. One end of the screw is connected to the screw handle, and the other end is The screw hole extends into the base; the lead nut is threadedly connected with the lead screw, and extends out of the base from the guide groove; the fixed base is fixed on the base, the movable base is placed on the base and fixedly connected with the guide nut, and the two clamp The boxes are respectively installed on the fixed base and the mobile base; the clamping box includes a box body, the front end of the box is open, and the rear end is provided with ventilation holes, and several rows of clamp sheets are placed in the box and are controlled by the box. The front end of the clamp protrudes, and the clamping layer is limited by the limit block; each layer of the clamping layer is composed of multiple positive clamping plates and negative clamping plates in sequence, and is fixed by positioning screws and a number of adjustments. The screws are tight.

Further, the clamping box may further include a clamp cover, which is clamped on the groove of the box body, covers the front end of the box body, and can be freely disassembled.

Further, the clamping piece has a groove, and the limiting block limits the clamping piece through the groove. the

Compared with the prior art, the beneficial effects of the present invention are as follows:

1. The present invention has simple structure and is easy to operate;

2. By setting up many fixture pieces, and the fixture pieces are in two states of positive and negative, the multi-point clamping of complex parts by the fixture can be realized;

3. By setting the vent hole, the fixture piece can be under elastic reasoning, so that each fixture piece can be in contact with complex parts as much as possible without damaging the workpiece;

4. By setting the set screw, the work can be adjusted freely. The number of clamp pieces and the clamping width can be adjusted freely, so as to adapt to complex parts of different sizes and shapes;

5. By setting the fixture cover and installing the fixture cover, the clamping task of the traditional fixture can be realized.

6. By rotating the installation angle of the box, it can realize the clamping tasks of different complex parts in different directions, and then realize the subsequent processing.

7. The multi-point flexible clamp of the present invention can quickly, efficiently and efficiently clamp a variety of complex parts, and has excellent application prospects.

Description of drawings

Fig. 1 is the front view of multi-point forming jig in the embodiment of the present invention;

Fig. 2 is the top view of clamp sheet in the embodiment of the present invention;

Fig. 3 is the front view of clamp sheet in the embodiment of the present invention;

Fig. 4 is a top view of the working state of the front and back of the clamp piece in the embodiment of the present invention;

Fig. 5 is a front view of the working state of the front and back of the clamp piece in the embodiment of the present invention;

Fig. 6 is a top view of the movable clamping part in the embodiment of the present invention;

Fig. 7 is the top view of the clamping part where the upper clamp cover is installed in the embodiment of the present invention;

Fig. 8 is a front view of another installation state of the box body in the embodiment of the present invention;

Fig. 9 is a front view of another implementation form of the limit function in the embodiment of the present invention;

In the figure, the base 1, the fixed base 2, the box body 3, the vent hole 4, the front clamp piece 5, the limit block 6, the positioning set screw 7, the complex parts 8, the reverse clamp piece 9, and the mobile base 10 , Guide nut 11, lead screw handle 12, lead screw 13, adjustment set screw 14, clamp cover 15, compression piece 16, long bolt 17.

Detailed ways

The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be noted that the following embodiments are intended to facilitate the understanding of the present invention, but do not limit it in any way.

As shown in Figure 1, the multi-point flexible fixture of the present invention includes a base 1, a driving part and a clamping part, wherein the driving part is mainly composed of a guide nut 11, a lead screw handle 12 and a lead screw 13, and the clamping part is mainly composed of a fixed base Seat 2, mobile base 10 and two clamping boxes form. The base 1 is a hollow box with a screw hole on one side and a guide groove on the top. One end of the screw 13 is connected to the screw handle 12, and the other end extends into the base 1 through the screw hole, and can rotate freely in the base 1. . The guide nut 11 is threadedly connected with the lead screw 13, and protrudes from the base 1 from the guide groove. The fixed base 2 is fixed on the base 1 , the mobile base 10 is placed on the base 1 and fixedly connected with the guide nut 11 . The two clamping boxes are installed on the fixed base 2 and the mobile base 10 respectively.

As shown in Figure 1 and Figure 8, the clamping box includes a box body 3, the front surface of the box body 3 is open, and the rear end surface is opened with a ventilation hole 4, and several rows (two rows in Figure 8) of clamping sheets are placed in the box. Inside the body 3 and protruding from the front end of the box body 3 , the clamp sheet is limited by the stopper 6 to prevent the clamp sheet from falling off from the front end surface of the box body 3 . As shown in Figure 4-6, each layer of jig sheet is formed by stacking a plurality of front jig pieces 5 and reverse jig pieces 9 at intervals, and is adjusted by positioning set screws 7 (in the vertical direction) and several adjustments. The set screw 14 (in the direction perpendicular to the paper) is tightened.

The structure of the jig piece is shown in Figures 2 and 3, the upper and lower sides are parallel, the tail is flat, there is a limit groove in the middle, and the head is an asymmetric shape. When the front jig piece 5 and the back jig piece 9 are stacked at intervals, For better gripping of complex parts8.

As shown in FIG. 7 , the clamping box can also include a clamp cover 15 , which is clamped on the groove of the box body 3 , covers the front end of the box body 3 , and can be freely disassembled.

As shown in FIG. 9 , the clamp sheets can also be limited by long bolts 17 and tightly fixed by pressing pieces 16 .

The working process of the present invention is as follows: first, according to the actual width adjustment set screw 14 of complex part 8, the width of the clamping piece 5,9 that makes work is adjusted to the width that can clamp complex part 8; Simultaneously, adjust set screw 7 , so that the clamp pieces 5, 9 can move. the

Then, the high-pressure gas is sent into the box body 3 through the vent hole 4, so that the working clamp pieces 5 and 9 are pushed forward to the limit block 6; then, the handle 12 is turned, and the lead nut 11 moves under the drive of the lead screw 13. , to drive the mobile base 10 to move along the axial direction of the lead screw 13, so that the distance between the two clamping boxes is reduced.

When the distance between the two clamping boxes is slightly greater than the thickness of the complex part 8, the complex part 8 is placed in the middle of the clamping box, and the handle 12 is continued to be rotated, so that the set working fixture sheets 5, 9 and the complex part 8 are all in contact. , at this time, tighten the set screw 7 to complete the clamping task of the complex part 8 and carry out subsequent machining.

After the processing is completed, turn the hand wheel of the leading screw 13 in the opposite direction, take off the complex part 8, and make the mobile base 10 get back to the original position.

The above is a complete working process of the multi-point flexible clamp of the present invention, and the clamping task of complex parts 8 of different sizes is completed through the set of clamping processes.

The embodiments described above have described the technical solutions and beneficial effects of the present invention in detail. It should be understood that the above descriptions are only specific embodiments of the present invention, and are not intended to limit the present invention. All within the scope of the principles of the present invention Any modifications, supplements and equivalent replacements should be included within the protection scope of the present invention.

Claims (3)

1. multi-point flexibly fixture, it is characterized in that, it comprises base (1), drive part and retained part, wherein, drive part mainly is comprised of guiding nut (11), leading screw handle (12) and leading screw (13) etc., and retained part mainly is comprised of fixed pedestal (2), mobile foundation (10) and two clamping casees; Base (1) is a hollow box body, and a side has screw hole, and the top has gathering sill, and leading screw (13) one ends connect leading screw handle (12), and the other end stretches into base (1) by screw hole; Guiding nut (11) spins with leading screw (13) screw thread, and from gathering sill protuberate basic unit (1); Fixed pedestal (2) is fixed on base (1), and mobile foundation (10) is placed in base (1) upward and is fixedly connected with guiding nut (11), and two clamping casees are arranged on respectively on fixed pedestal (2) and mobile foundation (10); Described clamping case comprises a casing (3), and the front end face opening of casing (3), rear end face have passage (4), and some bar clamp sheets are placed in casing (3) and are stretched out by the front end face of casing (3), and the fixture lamella is spacing by limited block (6); Every layer of fixture lamella is formed by stacking at the interval successively by the clamp sheet (5) in a plurality of fronts and the clamp sheet (9) of reverse side, and by location holding screw (7) and some adjusting holding screws (14) tightening.

2. multi-point flexibly fixture according to claim 1, is characterized in that, described clamping case can also comprise a fixture cover (15), and fixture cover (15) is clamped on the groove of casing (3), covers the front end face of casing (3), and can freely dismantle.

3. multi-point flexibly fixture according to claim 1, is characterized in that, described clamp sheet has groove, and limited block (6) carries out spacing by this groove to clamp sheet.

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