Non-road crankshaft heat treatment double-layer support

Abstract

The utility model discloses a non-road crankshaft heat treatment double-layer bracket which comprises an upper-layer bracket and a lower-layer bracket, a supporting surface is fixed on the base of the lower-layer bracket; a plurality of positioning rods are arranged on two sides of the supporting surface; a supporting face is arranged on a base of the upper-layer support, and a positioning sleeve is further arranged on the base of the support. The positioning sleeve corresponds to the positioning rod in position; the lower end of the upper-layer bracket positioning sleeve and the lower-layer bracket positioning rod are also sleeved with adjusting washers; and the lower-layer bracket supporting surface and the upper-layer bracket supporting surface are fixed on the base through supporting rib plates. The double-layer support has the advantages that the double-layer support enables all the crankshafts to be placed above the middle of a hearth of the trolley type heating furnace, the furnace temperature uniformity is optimal, and the overall uniformity of the quenched and tempered crankshafts is improved; 2, the charging quantity of the trolley type heating furnace is increased, and the production efficiency is improved;

Description

Technical Field

[0001] The utility model relates to the field of machinery, in particular to a workpiece support for a heat treatment furnace. Background Art

[0002] In the quenching and high-temperature tempering process of non-road crankshaft blanks, when producing in a trolley-type heating furnace, the loading method uses a support for single-layer placement; the support is a simple rectangular support. When placing the crankshaft, different loading methods are adopted according to the straightness situation to meet the straightness requirements of the crankshaft after tempering. The above-mentioned crankshaft heat treatment process has the following drawbacks: 1. The furnace temperature uniformity in the middle and upper half of the hearth of the trolley-type heating furnace is the best. However, with the existing support, the space where the crankshaft is located is in the middle and lower height sections of the hearth, and the furnace temperature uniformity is not in the best state, resulting in poor hardness uniformity of the crankshaft after quenching and tempering. 2. In the quenching and high-temperature tempering process of the crankshaft, it can only be placed in a single layer on the trolley plane, wasting the upper half area space of the hearth of the trolley-type heating furnace and having low production efficiency. Summary of the Utility Model

[0003] To solve the above technical problems, the purpose of the utility model is to provide a double-layer support for non-road crankshaft heat treatment, including an upper support and a lower support; a support surface is fixed on the base of the lower support, and multiple positioning rods are arranged on both sides of the support surface; a support surface is arranged on the base of the upper support, and positioning sleeves are also arranged on the base of the support; the positioning sleeves correspond to the positions of the positioning rods; adjusting washers are also sleeved on the lower ends of the positioning sleeves of the upper support and the positioning rods of the lower support; the support surfaces of the lower support and the upper support are both fixed to the base through support ribs.

[0004] Multiple process holes for preventing deformation are arranged on the support ribs.

[0005] Lifting points are arranged on both sides of the support ribs.

[0006] Reinforcing ribs are arranged between the support ribs and the base.

[0007] The adjusting washers are stacked in multiple layers and are used to adjust the distance between the upper support and the lower support.

[0008] The advantages of the utility model are: 1. The double-layer support places all the crankshafts above the middle of the hearth of the trolley-type heating furnace, with the best furnace temperature uniformity, improving the overall uniformity of the crankshaft after quenching and tempering; 2. Increasing the number of workpieces loaded in the trolley-type heating furnace and improving production efficiency. Brief Description of the Drawings

[0009] Figure 1 It is a schematic diagram of the use state of the utility model;

[0010] Figure 2 It is a schematic diagram of the structure of the upper support;

[0011] Figure 3 It is a schematic structural diagram of the lower bracket. Specific implementation mode

[0012] The present utility model will be specifically described below in conjunction with the accompanying drawings. As shown in the figure, the present utility model includes an upper bracket and a lower bracket; a support surface 6 is fixed on the base 9 of the lower bracket, and multiple positioning rods 5 are arranged on both sides of the support surface; a support surface 1 is arranged on the base 13 of the upper bracket, and a positioning sleeve 4 is also arranged on the base of the upper bracket; the positioning sleeve 4 corresponds to the positioning rod 5 in position; an adjusting washer 10 is also sleeved on the lower end of the positioning sleeve 4 of the upper bracket and the positioning rod 5 of the lower bracket; the support surfaces of the lower bracket and the upper bracket are both fixed to the base through support ribs 11.

[0013] To adapt to a small amount of deformation, a plurality of process holes 2 for preventing deformation are arranged on the support ribs.

[0014] Lifting points 3 or lifting points 7 are arranged on both sides of the support ribs. It is also possible to arrange lifting points on the support ribs 11 of both the upper and lower layers, as Figure 2 and Figure 3 shown.

[0015] To increase firmness, fixing and strengthening ribs 8 are arranged between the support ribs and the base.

[0016] To adapt to different height adjustment requirements to adapt to different crankshafts 12, the adjusting washers 10 are stacked in multiple layers.

[0017] The usage method of the present utility model:

[0018] Place the base 9 of the lower bracket on the trolley plane, and then place the crankshaft 12 on the lower support surface 6 in different furnace loading methods according to the straightness condition.

[0019] After using a crane to dock and fit the positioning sleeve 4 of the upper bracket with the positioning rod 5 of the lower bracket, the upper bracket can be stably placed on the lower bracket. Then, place the crankshaft on the upper support surface 1 in the same way as the lower tooling and in different furnace loading methods according to the straightness condition, and then perform heating. Adjusting washers can be sleeved on the lower positioning rod as needed to adjust the height of the upper bracket to adapt to crankshafts with different diameters and the furnace chamber height of the trolley-type heating furnace.

Claims

1. A non-road crankshaft heat treatment double-layer bracket, characterized by: It includes an upper bracket and a lower bracket; a supporting surface is fixed on the base of the lower bracket, and multiple positioning rods are arranged on both sides of the supporting surface; a supporting surface is arranged on the base of the upper bracket, and a positioning sleeve is also arranged on the base of the bracket; the positioning sleeve corresponds to the position of the positioning rod; an adjusting gasket is also installed on the lower end of the positioning sleeve of the upper bracket and the positioning rod of the lower bracket; the supporting surface of the lower bracket and the supporting surface of the upper bracket are both fixed to the base through supporting ribs.

2. The non-road crankshaft heat treatment double-layer bracket according to claim 1, characterized in that: A plurality of anti-deformation holes are arranged on the supporting ribs.

3. The non-road crankshaft heat treatment double-layer bracket according to claim 1, characterized in that: Lifting points are arranged on both sides of the supporting ribs.

4. The non-road crankshaft heat treatment double-layer bracket according to claim 1, characterized in that: Reinforcing ribs are arranged between the supporting ribs and the base.

5. The non-road crankshaft heat treatment double-layer bracket according to claim 1, characterized in that: The adjusting washers are stacked in multiple layers and are used to adjust the distance between the upper support and the lower support.

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