CN106967871A - A kind of curved sheets quenching fixture - Google Patents

Abstract

The invention belongs to aircraft curved sheets quenching technology, and in particular to a kind of curved sheets quenching fixture.The curved sheets quenching fixture, including supporting plate 1, steel band 2, contiguous block 3, supporting plate 4, steel band 5, baffle plate 6, alignment pin 7, link 8, link 9, first U-shaped piece 10, second U-shaped piece 11, connection fastener etc. between alignment pin 12, and each part.Curved sheets quenching fixture of the present invention is using positioning finger setting, steel band, U-shaped piece of clamping, it is to avoid in Quenching Treatment quenching distortion occurs for product, steel band weight is extremely light, the bulky problem of clamp fixture is solved, while improving the labor intensity of quenching precision, rate of reducing the number of rejects and seconds and workman.

Description

A Quenching Fixture for Curved Thin Plate

technical field

The invention belongs to the quenching technology of aircraft curved thin plates, in particular to a curved thin plate quenching fixture.

Background technique

The traditional quenching method is to go through the procedures of iron wire binding before quenching, and then immerse in a nitrate tank for quenching. After the workpiece is processed by the traditional quenching method, serious quenching deformation occurs, resulting in a high reject rate of the workpiece. Moreover, the consumption of labor and iron wire is quite high, which is time-consuming and labor-intensive, and no qualified workpiece can be obtained.

Contents of the invention

Purpose of the present invention:

Avoid quenching deformation of the curved surface sheet during quenching treatment, improve the quenching accuracy of the curved surface sheet, reduce the weight of the fixture and tooling, reduce the scrap rate and labor intensity of workers.

Technical scheme of the present invention:

A curved thin plate quenching fixture, the curved thin plate quenching fixture comprises a first support plate (1), a first steel strip (2), a connecting block (3), a second support plate (4), a second steel strip ( 5), baffle plate (6), first positioning pin (7), connecting frame (8), connecting frame (9), first U-shaped block (10), second U-shaped block (11), second positioning pin (12), wherein, the first support plate (1) and the second support plate (4) are used to support the curved surface sheet, and the support plates are connected by two connecting frames (9), and the positioning pin (7) is used for Fixture positioning, the first U-shaped block (10) and the second U-shaped block (11) are respectively welded on the first support plate (1) and the second support plate (4), and the two baffle plates (6) are respectively connected by cylindrical pins Be fixed on the first U-shaped block (10) and the second U-shaped block (11) with screws, the first steel strip (2) and the second steel strip (5) are riveted to the connecting block (3) respectively, and the tightening structure is Tighten the steel belt with the connecting block riveted with the steel belt and the U-shaped block welded with the support plate. The connecting block is threaded, and the nut is used in conjunction with the connecting block. Turn the nut and pull the connecting block to tighten the steel belt. The fixture material is 2Cr25Ni20 with high heat resistance.

The tightening structure of this fixture is to use the connecting block riveted with the steel strip and welded with the support plate to rise to a U-shaped block to tighten the steel strip. The connecting block has threads, and the nut is used in conjunction with the connecting block. Turn the nut and pull the connecting block. The steel belt tightens.

The baffle structure is designed. The tooling has a tendency to pop out sideways. To avoid side bounce, slot the front section of the U-shaped block, put a stopper in the slot, and connect the U-shaped slot and the stopper with cylindrical pins and screws.

Advantages of the present invention:

1) The pressing position of the thin plate quenching fixture is the product margin, and the product is not easy to deform;

2) High quenching precision: positioning pins are used to improve quenching precision and reduce scrap rate.

3) Clamping is easy to control: the clamp is clamped with a steel belt, and the steel belt is tightened with the connecting block riveted with the steel belt and the U-shaped block welded with the support plate. The nut is used in conjunction with the connecting block, and the nut is turned to pull the connecting block. The steel belt tightens.

4) The material is 2Cr25Ni20 with high heat resistance to avoid product deformation due to tooling deformation.

5) Description of drawings

Fig. 1 shows the structural representation of a kind of curved surface thin plate quenching fixture of the present invention;

Fig. 2 shows the structural representation of a kind of curved surface thin plate quenching fixture clamping of the present invention;

Fig. 3 is a schematic structural view of a support frame on one side of a curved thin plate quenching fixture of the present invention;

Among them, support plate 1, steel strip 2, connecting block 3, support plate 4, steel strip 5, baffle plate 6, positioning pin 7, connecting frame 8, connecting frame 9, U-shaped block 10, U-shaped block 11, positioning pin 12.

detailed description

Below in conjunction with accompanying drawing and embodiment the utility model is further described:

Please refer to FIG. 1 , which is a schematic structural diagram of a curved thin plate quenching fixture according to the present invention. The curved surface quenching thin plate fixture includes a support plate 1, a steel strip 2, a connecting block 3, a support plate 4, a steel strip 5, a baffle plate 6, a positioning pin 7, a connecting frame 8, a connecting frame 9, a U-shaped block 10, and a U-shaped Block 11, locating pin 12, and fasteners etc. for connecting between each piece. Among them, the support plate is used to support the curved surface thin plate, the two support plates are connected by two connecting frames, the positioning pin is used for fixture positioning, the steel belt, connecting block, U-shaped block and baffle are used for clamping The tight position is the margin position of the curved sheet product. After the positioning and pressing are completed, the curved surface thin plate quenching fixture can be put into the nitrate tank, and taken out after quenching treatment for a period of time, and the product can be taken out after cooling.

Please refer to FIG. 2 , which is a schematic diagram of a clamping structure of a curved thin plate quenching fixture according to the present invention. The curved thin plate quenching fixture is clamped with a steel strip, and the steel strip is tightened by a connecting block riveted with the steel strip and a U-shaped block. The nut is used in conjunction with the connecting block, and the nut is rotated to pull the connecting block, and the steel strip is tightened.

Please refer to FIG. 3 , which is a schematic structural diagram of a supporting frame on one side of a curved thin plate quenching fixture according to the present invention. The product margin of the support plate of the support frame, the positioning pin cooperates with the support plate to position the product, and there are two clamping mechanisms on both sides of the support plate, and the steel belt compresses the product margin. There is a lifting ring on one side of the support plate to hang the tooling, and the product and the tooling are immersed in the nitrate tank from the big end to reduce the quenching deformation of the product.

When the curved surface thin plate quenching fixture of the present invention works, its specific operation steps are as follows:

1) Before use, check whether the screws of the lifting ring are tightened, whether the screws connecting the connector and the support plate are tightened, and whether the baffle of the fixture is lifted.

2) Put the product on the tooling support plate, and use the reference hole of the product to find the correct installation position.

3) Use the positioning pin 7 and the positioning pin 12 to position the product, and use the steel belt 2 and the steel belt 5 to compress the product, and the nut rotates to tighten the steel belt.

4) Put down the baffle of the fixture and judge the size of the gap between the U-shaped block and the steel belt. If the gap is large, add a baffle. If the gap is not large, immerse the fixture and the product in the nitrate tank.

5) Check the timer. When a certain time is reached, the fixture and the product can be taken out, and the curved surface sheet is quenched.

Precautions:

1) When the tooling is not in use, place the tooling vertically to avoid deformation of the tooling.

2) Determine the quenching time according to the actual situation of the curved thin plate.

3) The tooling must be inspected before use to ensure the safety of the tooling.

Claims (2)

1. a kind of curved sheets quenching fixture, the curved sheets quenching fixture, including the first supporting plate (1), the One steel band (2), contiguous block (3), the second supporting plate (4), the second steel band (5), baffle plate (6), the first alignment pin (7), link (8), link (9), first U-shaped piece (10), second U-shaped piece (11), the second positioning Sell (12), wherein, the first supporting plate (1) and the second supporting plate (4) for supporting curved sheets, supporting plate it Between connected by two links (9), alignment pin (7) is to be used for fixture positioning, first U-shaped piece (10) and the Two U-shaped pieces (11) are respectively welded in the first supporting plate (1) and the second supporting plate (4), two baffle plates (6) point Be not fixed on first U-shaped piece (10) and second U-shaped piece (11) with straight pin and screw, the first steel band (2) and Second steel band (5) rivets contiguous block (3) respectively, tightening structure be with the contiguous block riveted with steel band and with support U-shaped piece of plate weld tightens up steel band, and contiguous block is threaded, and nut is used cooperatively with contiguous block, rotating nut, Contiguous block is pulled, steel band is tightened up.

2. the curved sheets quenching fixture according to right wants 1, it is characterised in that material selection heat resistance compared with High 2Cr25Ni20.