CN217202845U

CN217202845U - Clamping device for quenching ultrahigh-strength steel thin-wall structural part

Info

Publication number: CN217202845U
Application number: CN202221021841.7U
Authority: CN
Inventors: 熊新红; 曹国智; 朱春东
Original assignee: Industrial Research Institute Of Wuhan University Of Technology In Suizhou
Current assignee: Industrial Research Institute Of Wuhan University Of Technology In Suizhou
Priority date: 2022-04-29
Filing date: 2022-04-29
Publication date: 2022-08-16
Anticipated expiration: 2032-04-29

Abstract

The utility model provides a super high strength steel thin-walled structure spare is quenched and is used clamping device, includes base and heat preservation cover, its characterized in that: the base is provided with a plurality of pairs of mutually parallel stand columns, a left pressure plate and a right pressure plate with adjustable heights are respectively installed on the stand columns, and the left pressure plate and the right pressure plate are riveted together through a pin shaft. The utility model has simple structure and convenient operation, can control the expansion space of the workpiece and reduce the deformation of the thin-wall component in the quenching process.

Description

Clamping device for quenching ultrahigh-strength steel thin-wall structural part

Technical Field

The utility model relates to the field of machinary, concretely relates to super high strength steel thin-walled structure quenches and uses clamping device.

Background

Aiming at the forming of various special-shaped thin-wall components, the hot stamping forming technology is generally adopted in the manufacturing industry at present. The hot stamping forming technology is a forming mode that a boron steel plate (with initial strength of 500-700 MPa) is heated to an austenitizing state, the boron steel plate is quickly transferred to a die to be stamped and formed at high speed, a workpiece is quenched in the die body at a cooling speed of more than 27 ℃/s under the condition of ensuring a certain pressure, and pressure maintaining quenching is carried out for a period of time, so that an ultrahigh-strength steel part with a uniform martensite structure is obtained. The forming method has the advantages of relatively good part forming performance, relatively high dimensional precision and good surface hardness, dent resistance and rigidity of the part. However, the hot stamping production line has high fixing cost, needs different hot stamping dies for forming different parts, and is not suitable for producing small-batch and various components. The production and processing method of molding before treatment is more suitable for processing and molding of multiple types of special-shaped thin-wall components in small batches.

The special-shaped thin-wall component has relatively complex structure, poor rigidity and large cutting allowance, and is very easy to generate thermal stress and structural stress in the quenching treatment process. Under the combined action of the internal stresses, the deformation and even the cracking occur to a greater extent, the assembly and use precision of the component is affected, and the structural component can be scrapped under severe conditions.

Disclosure of Invention

The utility model aims at overcoming the defects of the prior art and providing a component clamping device which has simple structure and convenient operation, can control the expansion space of the component and reduce the deformation of the thin-wall component in the quenching process.

In order to achieve the above purpose, the technical solution of the utility model is that: the utility model provides a super high strength steel thin-walled structure spare is quenched and is used clamping device, includes base and heat preservation cover, its characterized in that: the base is provided with a plurality of pairs of mutually parallel stand columns, a left pressure plate and a right pressure plate with adjustable heights are respectively installed on the stand columns, and the left pressure plate and the right pressure plate are riveted together through a pin shaft.

The stand, the left pressing plate and the right pressing plate are all provided with sliding grooves, and the left pressing plate and the right pressing plate are respectively connected in the sliding grooves in a sliding mode.

The base is provided with two parallel side plates, and the upright columns are respectively arranged at the tops of the two side plates.

A plurality of heat transfer holes are uniformly distributed on the heat preservation cover and the side plates.

The bottom of base is provided with a plurality of support columns.

The included angle between the left pressing plate and the right pressing plate ranges from 135 degrees to 180 degrees.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the utility model adopts a unique adjustable press mounting structure, can control the thermal expansion space of the component through the matching adjustment of two pressure bars aiming at the thin-wall structural members with different shapes, and effectively reduces the deformation of the thin-wall structural members generated in the quenching process.

2. The utility model discloses a heat preservation cover structure with even hole can effectively reduce the cooling volume of quenching transfer in-process component, guarantees that the component can carry out martensite (or bainite) with the cold rate that is greater than critical cooling rate fast to below Ms (or near Ms isothermal) and change.

Drawings

Fig. 1 is a schematic structural view of the utility model when the heat preservation cover is not installed.

Fig. 2 is a schematic structural view (side view) of the heat-insulating cover of the present invention.

In the figure: base 1, heat preservation cover 2, stand 3, left clamp plate 4, right clamp plate 5, round pin axle 6, spout 7, curb plate 8, heat transfer hole 9, support column 10.

Detailed Description

The present invention will be described in further detail with reference to the following description and embodiments in conjunction with the accompanying drawings.

As shown in fig. 1-2, the clamping device for quenching the ultra-high strength steel thin-wall structural member comprises a base 1 and a heat-insulating cover 2, wherein a plurality of support columns 10 are arranged at the bottom of the base 1, two parallel side plates 8 are arranged on the base 1, a plurality of heat transfer holes 9 are uniformly distributed on the heat-insulating cover 2 and the side plates 8, a plurality of pairs of parallel upright posts 3 are arranged at the top of each side plate 8, sliding grooves 7 are arranged on the upright posts 3, a left pressing plate 4 and a right pressing plate 5, the left pressing plate 4 and the right pressing plate 5 are respectively connected in the sliding grooves 7 in a sliding mode through sliding shafts, the left pressing plate 4 and the right pressing plate 5 are riveted together through pin shafts 6, and the included angle between the left pressing plate 4 and the right pressing plate 5 can be adjusted to 135-180 degrees by adjusting the heights of the left pressing plate 4 and the right pressing plate 5 in the sliding grooves 7.

The utility model discloses a use does:

press fitting of S1 components: the special-shaped thin-wall component is placed between the two side plates 8 on the base 1, and then the height of the left pressing plate 4 and the height of the right pressing plate 5 in the sliding groove 7 are adjusted, so that the riveted left pressing plate 4 and the riveted right pressing plate 5 are located above the component. The left pressing plate 4 and the right pressing plate 5 are made of heat-resistant materials, and the thermal expansion coefficient of the heat-resistant materials is lower than that of a processed workpiece. In order to prevent the deformation of the added member during the heating process, the left pressing plate 4, the right pressing plate 5 and the member are kept in parallel relation and a certain gap is reserved between the left pressing plate and the right pressing plate, so that the expansion of the member caused by heating during the heating process in the resistance heating furnace can be inhibited to the maximum extent. After press fitting and fixing, the heat preservation cover 2 is arranged on the base 1.

Heating of the S2 member: the whole pressed component is put into a furnace for heating, and a plurality of heat transfer holes 9 are uniformly distributed on the heat preservation cover 2 and the side plate 8. For preventing the phenomenon that the bottom of the component absorbs heat insufficiently in the heating process, four supporting columns are reserved below the base 1, so that the base 1 is integrally lifted, and the heating efficiency of the bottom of the component is effectively improved.

Transfer of the S3 component: and (3) when the component is heated to about 900 ℃, preserving the heat of the heating furnace for 30-45 minutes to ensure that the temperature of each part of the component reaches the specified temperature, and opening the furnace to hoist after the heat preservation is finished. Firstly, a base 1 is hoisted by using a workshop gantry crane to drive the whole tool to move towards a quenching cooling pool together. When the distance between the whole tool and the water pool is 1m, the component and the whole tool are inclined at a certain speed and immersed into the cooling liquid at the temperature of 5-10 ℃.

Through the three processes of press mounting, heating and transferring of the components, quenching treatment of the ultrahigh-strength steel special-shaped thin-wall components is completed, the deformation of the components in the whole quenching process is effectively controlled in the heat treatment process, and the strength of the components after quenching is improved.

Claims

1. The utility model provides a super high strength steel thin-walled structure spare is quenched and is used clamping device, includes base (1) and heat preservation cover (2), its characterized in that: the base (1) is provided with a plurality of pairs of mutually parallel upright posts (3), a left pressure plate (4) and a right pressure plate (5) with adjustable heights are respectively installed on the upright posts (3), and the left pressure plate (4) and the right pressure plate (5) are riveted together through a pin shaft (6).

2. The clamping device for quenching the ultra-high strength steel thin-wall structural part according to claim 1, wherein: all be provided with spout (7) on stand (3), left clamp plate (4) and right clamp plate (5), left side clamp plate (4) and right clamp plate (5) sliding connection are in spout (7) respectively.

3. The clamping device for quenching the ultra-high strength steel thin-wall structural part according to claim 1, wherein: the base (1) is provided with two parallel side plates (8), and the upright posts (3) are respectively arranged at the tops of the two side plates (8).

4. The clamping device for quenching the ultra-high strength steel thin-wall structural part according to claim 3, wherein: a plurality of heat transfer holes (9) are uniformly distributed on the heat preservation cover (2) and the side plate (8).

5. The clamping device for quenching the ultra-high strength steel thin-wall structural part according to claim 1, wherein: the bottom of the base (1) is provided with a plurality of supporting columns (10).

6. The clamping device for quenching the ultra-high strength steel thin-wall structural part according to claim 1, wherein: the included angle between the left pressure plate (4) and the right pressure plate (5) is 135-180 degrees.