Uniform quenching device for large-size forgings

Abstract

The utility model relates to a uniform quenching device for a large-size forge piece, which comprises a forge piece, a quenching bath and a PLC (Programmable Logic Controller), a spray quenching device is arranged at the upper part of the quenching bath, the spray quenching device comprises a spray head, a liquid spray direction adjusting device and a control valve, and the liquid spray direction adjusting device controls the direction of the spray head. At least two layers of sprayers are arranged from top to bottom, each layer is formed by arranging a plurality of sprayers into a row in the horizontal direction, and the quenching liquid sprayers are symmetrically arranged on the two sides of the upper part of the quenching bath. And in the descending process of the forge piece, controlling the nozzle to spray quenching liquid to the upper end and all side surfaces of the forge piece to realize synchronous and rapid cooling of each area of the forge piece in the descending process. When the forge piece ascends, the spray head sprays quenching liquid to the upper end and all the side faces of the forge piece, and all areas of the forge piece are synchronously and rapidly cooled in the ascending process. Therefore, synchronous rapid cooling and synchronous slow cooling of all outer surfaces in the quenching process of the forging are ensured, and the purpose of improving the heat treatment quality of the crank forging is achieved.

Description

Technical Field

[0001] The utility model relates to a quenching device, in particular to a quenching device for large-size forgings, and belongs to the technical field of mechanical manufacturing. Background Art

[0002] Large modules are large in size and weight. During the heat treatment process, forgings must enter the quenching liquid in sequence. When entering the quenching liquid, the lower part of the forging that enters the quenching liquid first cools quickly first, and the upper part of the forging that enters the quenching liquid later cools quickly. When leaving the quenching liquid, the upper part of the forging leaves first and ends the rapid cooling, and the lower part leaves later and ends the rapid cooling, resulting in a difference in the degree of quenching between the upper and lower parts of the forging, resulting in uneven quenching. Some forgings require multiple rounds of liquid cooling and air cooling alternately, and the uneven quenching is more serious, which is difficult to solve even through tempering. Summary of the invention

[0003] In response to the problems pointed out in the background technology, the utility model proposes a uniform quenching device for large-size forgings, which adds a coolant spraying device to spray quenching liquid on the forging parts that have not entered the quenching liquid in the quenching pool, so that all areas of the workpiece can be quickly cooled synchronously to ensure the quenching hardness and improve the uniformity of heat treatment.

[0004] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a large-size forging uniform quenching device, comprising: a quenching pool, a spray quenching device, a crank forging and a PLC controller, wherein a quenching liquid is provided in the quenching pool, and the characteristics are:

[0005] A spray quenching device is provided on the upper part of the quenching pool, and the spray quenching device includes a spray head and a control valve;

[0006] The nozzles are symmetrically arranged on both sides of the upper part of the quenching tank;

[0007] The nozzles are arranged in at least two layers from top to bottom, and each layer consists of a plurality of nozzles arranged in a row in a horizontal direction;

[0008] A position sensor is provided on the side wall of the quenching pool for measuring the position of the crank forging;

[0009] The position sensor is electrically connected to the PLC to transmit the measured forging position information to the PLC;

[0010] The control valve is arranged at the inlet of the quenching liquid outside the quenching tank, and the PLC command control valve controls the opening or closing of the nozzle.

[0011] Further, the PLC command control valve controls the pressure and flow rate of the quenching liquid sprayed from the nozzle;

[0012] Preferably, the distance between two adjacent nozzles in the same row is set to 80-120 mm.

[0013] Preferably, the pressure of the spray head is set between 0.3-0.6Mpa;

[0014] Preferably, the diameter of the nozzle orifice is set between 4mm and 8mm.

[0015] The utility model arranges a coolant spraying device above the quenching pool. When the forging descends to the lower end and contacts the quenching liquid, the nozzle is controlled to spray the quenching liquid to the upper end and all sides of the forging until the forging enters the quenching liquid, and the nozzle is closed to achieve synchronous rapid cooling of all regions of the forging during the descending process. When the upper end of the forging leaves the quenching liquid, the nozzle sprays the quenching liquid to the upper end and all sides of the forging until the lower end of the forging leaves the quenching liquid, and the nozzle is closed to achieve synchronous rapid cooling of all regions of the forging during the ascending process. Thereby ensuring synchronous rapid cooling and synchronous slow cooling of all outer surfaces during the quenching process of the forging, the purpose of improving the heat treatment quality of the crank forging is achieved.

[0016] The utility model has good quenching effect and improves the uniformity of heat treatment of forgings while ensuring the quenching hardness. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Attached Figure 1 It is a schematic diagram of the main cross-sectional structure of the present invention;

[0018] Attached Figure 2 For attachment Figure 1 Schematic diagram of the cross-sectional structure along the AA axis.

[0019] In the accompanying drawings, 1 is a quenching pool, 2 is a quenching liquid, 3 is a sling, 4 is a crank forging, 5 and 5' are vertical quenching liquid conduits, 6 and 6' are horizontal quenching liquid conduits, 7 and 7' are nozzles, 8 is a position sensor, and a is an inlet for the quenching liquid outside the pool. DETAILED DESCRIPTION

[0020] The utility model is further explained below in conjunction with the accompanying drawings:

[0021] As shown in the accompanying drawings, the nozzles 7 and 7' are symmetrically arranged on both sides of the upper part of the quenching pool 1, and are arranged in two layers from top to bottom, each layer consists of multiple nozzles 7 and 7' arranged in a row horizontally; a control valve (not shown in the figure) is arranged at the quenching liquid inlet a outside the pool.

[0022] Attached Figure 1 and 2 The diagram shown is a schematic diagram of a crank forging 4 entering a quenching tank 1 , in which the crank forging 4 is suspended by a sling 3 and moves downward.

[0023] When the crank forging 4 descends to the lower end and contacts the quenching liquid 2 in the quenching pool 1, the sensor 8 transmits the position information of the crank forging 4 at this time to the PLC, and the PLC instructs the control valve at the quenching liquid inlet a outside the pool to open, and the quenching liquid outside the pool enters the nozzles 7 and 7' through the quenching liquid horizontal conduits 6, 6' and the quenching liquid vertical conduits 5, 5', and sprays the quenching liquid to the crank forging 4 above the quenching liquid 2, and the entire crank forging 4 is rapidly cooled synchronously.

[0024] When the crank forging 4 descends to the upper end and enters the quenching liquid 2 in the quenching pool 1, the sensor 8 transmits the position information of the crank forging 4 at this time to the PLC, and the PLC instructs the control valve at the quenching liquid inlet a outside the pool to close, and the entire crank forging 4 is synchronously and rapidly cooled in the quenching liquid 2 in the quenching pool 1.

[0025] The process of the crank forging 4 ascending is not shown in the figure in this embodiment, and the reference is made to the attached Figure 1 and 2 is obvious.

[0026] When the crank forging 4 moves upward to the upper end and leaves the quenching liquid 2 in the quenching pool 1, the sensor 8 transmits the position information of the crank forging 4 at this time to the PLC, and the PLC instructs the control valve at the quenching liquid inlet a outside the pool to open, and the nozzles 7 and 7' spray quenching liquid to the crank forging 4 above the quenching liquid 2 in the quenching pool 1, and the entire crank forging 4 is rapidly cooled synchronously.

[0027] When the crank forging 4 moves upward to the lower end and leaves the quenching liquid 2 in the quenching pool 1, the sensor 8 transmits the position information of the crank forging 4 at this time to the PLC, and the PLC instructs the control valve at the quenching liquid inlet a outside the pool to close, and the entire crank forging 4 stops rapid cooling.

[0028] The rotating quenching liquid transverse conduits 6, 6' can appropriately adjust the spraying direction of the nozzles 7 and 7' to ensure that the quenching liquid is sprayed onto the forging.

[0029] According to the actual situation of the crank forging 4, the PLC instructs the control valve at the quenching liquid inlet a outside the pool to realize the pressure and flow rate of the quenching liquid sprayed out by the nozzles 7 and 7', thereby ensuring that the crank forging 4 is further quenched evenly.

Claims

1. A large-size forging uniform quenching device, comprising: A quenching tank, a spray quenching device, a crank forging and a PLC controller, wherein the quenching tank is provided with a quenching liquid, and is characterized in that: A spray quenching device is provided on the upper part of the quenching pool, and the spray quenching device includes a spray head and a control valve; The nozzles are symmetrically arranged on both sides of the upper part of the quenching tank; The nozzles are arranged in at least two layers from top to bottom, and each layer consists of a plurality of nozzles arranged in a row in a horizontal direction; A position sensor is provided on the side wall of the quenching tank; The position sensor is electrically connected to the PLC to transmit the measured forging position information to the PLC; The control valve is arranged at the inlet of the quenching liquid outside the quenching tank, and the PLC command control valve controls the opening or closing of the nozzle.

2. A large-size forging uniform quenching device according to claim 1, characterized in that: The PLC command control valve controls the pressure and flow rate of the quenching liquid sprayed from the nozzle.

3. A large-size forging uniform quenching device according to claim 1, characterized in that: The distance between two adjacent nozzles in the same row is set to 80-120 mm.

4. The large-size forging uniform quenching device according to claim 1, characterized in that: The pressure of the spray head spraying liquid is set between 0.3-0.6Mpa.

5. The large-size forging uniform quenching device according to claim 1, characterized in that: The diameter of the nozzle orifice is set between 4mm and 8mm.

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