Batch transfer bracket for heat treatment of small castings

Abstract

The utility model discloses a batch transfer bracket for heat treatment of small castings, which comprises a plurality of lifting layers which are arranged in parallel up and down, each lifting layer comprises an outer supporting square ring and an inner supporting square ring, the outer supporting square rings and the inner supporting square rings are rectangular, and the outer supporting square rings and the inner supporting square rings are rectangular. The four corners of the outer supporting square ring are connected with the four corners of the inner supporting square ring through plane connecting rods, and the distance between the long edge of the outer supporting square ring and the long edge of the inner supporting square ring is equal to the distance between the short edge of the outer supporting square ring and the short edge of the inner supporting square ring. The four corners of the inner supporting square rings located on the adjacent supporting layers are connected through vertical connecting rods. By adopting the structure, the batch transfer bracket for heat treatment of the small-sized castings can bear the small-sized castings in batches, and is convenient for heat treatment and transportation of the large-batch small-sized castings.

Description

Technical Field

[0001] The utility model relates to the field of casting manufacturing equipment, in particular to a batch transfer bracket for heat treatment of small castings. Background Art

[0002] Heat treatment of castings is an important means to improve the properties and performance of castings. Annealing, normalizing, quenching, and tempering are the "four fires" in overall heat treatment. For large quantities of small-sized castings with small volumes, to ensure the consistency of the quality of batch castings, it is necessary to ensure that the castings enter and exit the heat treatment furnace simultaneously. For example, the quenching operation is a process method in which the casting is heated in a baking furnace to a temperature above the critical temperature, held for a certain time, and then cooled in a quenching furnace at a cooling rate greater than the critical cooling rate. When the casting enters the baking furnace, it needs to be placed on a suitable bracket. After the heat preservation is completed and quenching is carried out, the batch of castings are simultaneously placed into the quenching furnace through the transfer bracket. However, some existing small-volume single-layer brackets can only carry a small number of castings. For large-scale production of castings, manual multi-trip handling is required, and the single-layer brackets have low utilization rate of the space in the baking furnace and cannot achieve the best heat utilization effect. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a batch transfer bracket for heat treatment of small castings, which can batch-carry small-sized castings and is convenient for heat treatment and transportation of large quantities of small-sized castings.

[0004] To achieve the above purpose, the utility model provides a batch transfer bracket for heat treatment of small castings, including a number of lifting layers arranged in parallel upwards. The lifting layer includes an outer supporting square ring and an inner supporting square ring. Both the outer supporting square ring and the inner supporting square ring are rectangular. The four corners of the outer supporting square ring and the four corners of the inner supporting square ring are connected by planar connecting rods. The distance between the long sides of the outer supporting square ring and the long sides of the inner supporting square ring is equal to the distance between the short sides of the outer supporting square ring and the short sides of the inner supporting square ring. The four corners of the inner supporting square ring located in adjacent lifting layers are connected by vertical connecting rods.

[0005] Preferably, a lifting frame is arranged above the short side of the inner supporting square ring located at the topmost layer. A through rod sleeve is arranged at the top end of the lifting frame, and a lifting ring is arranged above the through rod sleeve.

[0006] Preferably, support short columns are arranged below the four corners of the outer supporting square ring located at the bottommost layer. The length of the support short column is one-fourth of the length of the vertical connecting rod.

[0007] Preferably, the length of the long side of the outer supporting square ring is 600 mm, the length of the short side of the outer supporting square ring is 300 mm, the length of the long side of the inner supporting square ring is 400 mm, and the length of the short side of the inner supporting square ring is 100 mm.

[0008] Preferably, the length of the vertical connecting rod is 80 mm, and four lifting layers are provided.

[0009] Therefore, the batch transfer bracket for heat treatment of small castings with the above structure according to the present invention can carry castings through the outer supporting square ring and the inner supporting square ring arranged on the same layer, and the multi-layer structure expands the number of castings carried. The castings are transferred through the through-rod sleeve or the lifting ring arranged at the top, which is convenient for batch heat treatment of the castings.

[0010] The technical solution of the present invention will be further described in detail below with reference to the drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic structural diagram of an embodiment of a batch transfer bracket for heat treatment of small castings according to the present invention.

[0012] REFERENCE SIGNS

[0013] 1, lifting layer; 2, lifting frame; 3, through-rod sleeve; 4, lifting ring; 5, planar connecting rod; 6, vertical connecting rod; 7, supporting short column; 8, outer supporting square ring; 9, inner supporting square ring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0014] The technical solution of the present invention will be further described below with reference to the drawings and embodiments.

[0015] Embodiment

[0016] As Figure 1 shown, a batch transfer bracket for heat treatment of small castings includes a plurality of lifting layers 1 arranged parallel to each other up and down. The lifting layer 1 includes an outer supporting square ring 8 and an inner supporting square ring 9. Both the outer supporting square ring 8 and the inner supporting square ring 9 are rectangular. The four corners of the outer supporting square ring 8 are connected to the four corners of the inner supporting square ring 9 through a planar connecting rod 5. The horizontal plane where the inner supporting square ring 9 is located can be slightly higher than the horizontal plane where the outer supporting square ring 8 is located, so that there is a certain height difference when the casting is lapped on the outer supporting square ring 8 and the inner supporting square ring 9. For some special-shaped castings with grooves, the casting can be placed more conveniently and stably. The distance between the long sides of the outer supporting square ring 8 and the long sides of the inner supporting square ring 9 is equal to the distance between the short sides of the outer supporting square ring 8 and the short sides of the inner supporting square ring 9, so that the casting can be placed on the entire plane of the lifting layer 1.

[0017] The outer supporting square ring 8, the inner supporting square ring 9, the planar connecting rod 5 and the vertical connecting rod 6 are made of heat-resistant alloy pipe fittings with the same diameter and are connected by welding.

[0018] The four corners of the inner supporting square ring 9 adjacent to the adjacent lifting layer 1 are connected by vertical connecting rods 6. The length of the vertical connecting rods 6 depends on the space occupied by the casting. According to the shape and size of the casting, vertical connecting rods 6 with appropriate lengths can be customized when manufacturing the transfer bracket to place the most layers of castings within a limited height, increase the number of castings transferred at one time by the transfer bracket, reasonably occupy the three-dimensional space in the baking furnace and quenching furnace, and avoid heat waste.

[0019] Above the short sides of the inner supporting square ring 9 at the topmost layer, a lifting frame 2 is provided. At the top of the lifting frame 2, a rod-passing sleeve 3 is provided, and above the rod-passing sleeve 3, a lifting ring 4 is provided. Lifting frames 2 are provided above both short sides of the inner supporting square ring 9. The transfer bracket can be lifted for transfer by simultaneously inserting long rods into the two rod-passing sleeves 3 and using the fork arms of a forklift to link the long rods. The two rod-passing sleeves 3 are beneficial for maintaining the balance of the transfer bracket and preventing the castings from slipping. The lifting ring 4 also has the function of bearing the transfer bracket, and through a lifting device with a hook, the lifting ring 4 can be hooked to achieve transfer.

[0020] Below the four corners of the outer supporting square ring 8 at the bottommost layer, supporting short columns 7 are provided. The length of the supporting short columns 7 is one-fourth of the length of the vertical connecting rods 6. The supporting short columns 7 can prevent the castings carried on the bottommost layer from contacting the ground or the bottom surface of the heat treatment furnace, facilitating the placement of the castings.

[0021] A possible size of the transfer bracket is as follows: the length of the long side of the outer supporting square ring 8 is 600 mm, the length of the short side of the outer supporting square ring 8 is 300 mm, the length of the long side of the inner supporting square ring 9 is 400 mm, and the length of the short side of the inner supporting square ring 9 is 100 mm. The length of the vertical connecting rods 6 is 80 mm, and four lifting layers 1 are provided. Multiple transfer brackets of this size can be placed in a baking furnace of general size, making full use of the space inside the furnace.

[0022] Therefore, the present utility model adopts a batch transfer bracket for heat treatment of small castings with the above structure, which can carry castings through the outer supporting square ring 8 and the inner supporting square ring 9 arranged on the same layer, expand the number of castings carried by the multi-layer structure, and transfer the castings through the rod-passing sleeves or lifting rings 4 provided at the top, facilitating batch heat treatment of the castings.

[0023] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model and are not intended to limit them. Although the present utility model has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that they can still modify or equivalently replace the technical solutions of the present utility model, and these modifications or equivalent replacements cannot make the modified technical solutions deviate from the spirit and scope of the technical solutions of the present utility model.

Claims

1. A batch transfer bracket for heat treatment of small castings, characterized in that: It includes a number of lifting layers arranged parallel up and down. The lifting layer includes an outer supporting square ring and an inner supporting square ring. Both the outer supporting square ring and the inner supporting square ring are rectangular. The four corners of the outer supporting square ring and the four corners of the inner supporting square ring are connected by planar connecting rods. The distance between the long sides of the outer supporting square ring and the long sides of the inner supporting square ring is equal to the distance between the short sides of the outer supporting square ring and the short sides of the inner supporting square ring. The four corners of the inner supporting square ring of adjacent lifting layers are connected by vertical connecting rods.

2. The batch transfer bracket for heat treatment of small castings according to claim 1, wherein: A lifting frame is arranged above the short side of the inner supporting square ring at the topmost layer. A rod-passing sleeve is arranged at the top end of the lifting frame, and a lifting ring is arranged above the rod-passing sleeve.

3. A batch transfer bracket for heat treatment of small castings according to claim 2, characterized in that: Supporting short columns are arranged below the four corners of the outer supporting square ring at the bottommost layer. The length of the supporting short column is one-fourth of the length of the vertical connecting rod.

4. A batch transfer bracket for heat treatment of small castings according to claim 3, characterized in that: The length of the long side of the outer supporting square ring is 600 mm, the length of the short side of the outer supporting square ring is 300 mm, the length of the long side of the inner supporting square ring is 400 mm, and the length of the short side of the inner supporting square ring is 100 mm.

5. A batch transfer bracket for heat treatment of small castings according to claim 4, characterized in that: The length of the vertical connecting rod is 80 mm, and there are four lifting layers.

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