CN102876861B - Quenching tool for crane wheels - Google Patents

Abstract

The invention relates to a quenching tool for a crane wheel, which comprises upper and lower cover plates for clamping the corresponding crane wheel, and the upper and lower cover plates are respectively provided with the upper and lower rims of the crane wheel. The end faces are tightly fitted to reduce the cooling rate of water on the outer end faces of the upper and lower rims during quenching. The upper and lower mating surfaces are provided between the outer contours of the upper and lower cover plates for corresponding water to pass through during quenching so that the water The gap directly facing the inner surface of the upper and lower rims is in contact with the cooling, and the lower cover plate is provided with a hoisting structure for hoisting of the corresponding sling. The invention provides a crane wheel quenching tool which can reduce the cooling speed of the outer end surface of the wheel rim and at the same time ensure the hardness of the inner surface of the wheel rim during quenching.

Description

Quenching tooling for crane wheels

technical field

The invention relates to a quenching tool for crane wheels.

Background technique

Existing crane wheels include treads for rolling fit with corresponding rails and upper and lower rims arranged on both axial sides of the treads to prevent derailment of crane wheels. The upper and lower rims have rim inner surfaces connected to the treads And the ring-shaped outer end surface of the rim distributed on the upper and lower ends of the crane wheel and arranged opposite to the inner surface of the corresponding rim. The tread surface of the crane wheel, the inner side of the rim and other parts have corresponding hardness requirements due to the need to contact the track. In order to ensure the hardness requirements of these parts, the crane wheel must be quenched. However, during the quenching process of the crane wheel, due to The rapid cooling of the inner and outer surfaces of the rim may easily cause the rim to crack. The conventional solution is to pre-cool the rim, but this easily leads to unqualified hardness on the inner surface of the rim because it does not meet the quenching conditions.

Contents of the invention

The purpose of the present invention is to provide a crane wheel quenching tool which can reduce the cooling speed of the outer end surface of the wheel rim and at the same time ensure the hardness of the inner surface of the wheel rim during quenching.

In order to solve the above problems, the technical solution of the present invention is:

A quenching tool for crane wheels, including upper and lower cover plates for clamping corresponding crane wheels, and the upper and lower cover plates are provided with facing oppositely and respectively used for the upper and lower rims of the crane wheels. The end faces are closely matched to reduce the cooling rate of water on the outer end faces of the upper and lower rims during quenching. The upper and lower mating surfaces are provided between the outer contours of the upper and lower cover plates for corresponding water to pass through during quenching. In order for the water to directly contact the cooling gap with the inner sides of the upper and lower rims, the lower cover plate is provided with a hoisting structure for hoisting of the corresponding sling.

On the periphery of the upper mating surface, the upper cover plate is provided with a downwardly protruding ring-shaped upper cooling performance adjustment boss; on the periphery of the lower mating surface, the lower cover is provided with The lower cooling performance adjustment boss of the upwardly protruding annular structure.

The hoisting structure includes a suspension pipe that extends axially along the up and down direction and is used to be installed in the hub shaft hole of the corresponding crane wheel. The lower end of the suspension pipe is fixed on the lower cover plate. The upper end of the pipe passes through the top of the upper cover plate, and the pipe wall of the hanging pipe is provided with a water hole for the hanging pipe connecting the inner hole of the hanging pipe and the hub axle hole of the corresponding crane wheel.

A handle is arranged on the upper cover.

The upper cover plate is provided with an upper cover plate groove that is concave to allow the upper hub of the corresponding crane wheel; the lower cover plate is provided with a lower cover that is concave to allow the lower hub of the corresponding crane wheel plate groove.

The upper cover plate is provided with an upper cover plate water hole for passing corresponding water during quenching so that the water can cool the upper side spokes of the corresponding crane wheel; the lower cover plate is provided with water holes for quenching The lower cover plate water holes for corresponding water to pass through to make the water cool the lower side spokes of the corresponding crane wheels.

The beneficial effects of the present invention are: when quenching the crane wheel, since the upper and lower mating surfaces on the upper and lower cover plates are closely matched with the outer end faces of the upper and lower rims of the crane wheel respectively, water is prevented from directly contacting the upper and lower rims. The outer end face of the rim greatly reduces the cooling speed of the upper and lower rim outer ends of the crane wheel, ensuring that the upper and lower rims will not crack; at the same time, due to the effect of the gap between the upper and lower cover plates, water can Directly contact with the inner surface of the upper and lower rims of the crane wheel and cool them, so as to ensure that the inner surfaces of the upper and lower rims complete the transformation of martensite in time, and ensure the hardness of the inner surfaces of the upper and lower rims.

Description of drawings

Fig. 1 is the use state diagram of the embodiment of the present invention;

FIG. 2 is a top view of FIG. 1 .

Detailed ways

An embodiment of a quenching tooling for a crane wheel is shown in Figures 1 to 2: it includes a hanger for hoisting the corresponding crane wheel 20 in the quenching pool, the hanger includes an upper cover plate 1 and a lower cover plate 17, and the upper cover plate 1 is provided with handle 2. The upper and lower cover plates are provided with upper mating surfaces 3 facing oppositely and respectively used to closely cooperate with the outer end surfaces of the upper and lower rims of the crane wheel 20 so as to reduce the cooling rate of water on the outer end surfaces of the upper and lower rims during quenching and the lower mating surface 9, the upper cover plate 1 is provided with a downwardly protruding ring-shaped upper cooling performance adjustment boss 4 on the periphery of the upper mating surface 3; the lower cover plate 17 is arranged on the periphery of the lower mating surface 9 There is a lower cooling performance adjustment boss 8 with an upwardly protruding annular structure. By changing the height of the upper and lower cooling performance adjustment bosses, the cooling performance of the upper and lower rim cooling zones can be changed to meet the needs of different rim thicknesses. . The upper cover plate 1 is provided with an upper cover plate water hole 16 for passing corresponding water during quenching, so that the water can cool the upper side spokes of the corresponding crane wheel 20; When quenching, corresponding water is passed through, so that the water cools the lower side spokes of the corresponding crane wheel 20 through the water hole of the lower cover plate. The upper cover plate 1 is provided with an upper cover plate groove 18 that is concave to allow the upper side hub of the corresponding crane wheel 20; Cover plate groove 19, the purpose of setting the upper and lower cover plate grooves is to accommodate the larger crane wheels of the hub size. Of course, the groove depth and groove diameter of the upper and lower cover plate grooves can be changed to adapt to different hub thicknesses and Crane wheel with hub diameter. The hanger also includes a hanger 14 that extends axially along the up and down direction and is used to be installed in the hub axle hole 10 of the corresponding crane wheel 20. The lower end of the hanger 14 is fixed on the lower cover plate 17, and the upper end of the hanger 14 It passes through the top of the upper cover plate 1 for hoisting by the corresponding sling. The pipe wall of the hanging pipe 14 is provided with a water hole 11 for the hanging pipe connecting the inner hole 15 of the hanging pipe and the hub shaft hole 10 of the corresponding crane wheel. At this time, the water can directly cool the hole wall of the hub shaft hole 10 through the water hole 11 of the hanging pipe, so as to ensure the hardness of the hub shaft hole 10. A gap 12 is provided between the upper and lower cover plates for passing corresponding water during quenching, so that the water directly contacts and cools the tread 6 , the inner surface 5 of the upper rim and the inner surface 7 of the lower rim of the crane wheel. Part 13 in the figure represents the through hole provided on the upper cover plate for the suspension pipe to pass through. During quenching, water can also cool the upper side spokes of the crane wheel through the through hole 13.

The adjustment principle of the upper and lower cooling performance adjustment bosses in the above embodiment is as follows: see Figure 1, the height of the upper and lower cooling performance adjustment bosses (hereinafter referred to as the height of the boss) and the thickness of the rim are relative, generally speaking The height of the rim boss with a large thickness should also be increased accordingly. For a rim of a certain thickness, increasing the height of the boss is equivalent to increasing the shading of the rim. Of course, the gap A between the upper and lower cooling performance adjustment bosses and the corresponding rim is also an influencing factor. If the gap is too large, the blocking effect will be lost; the smaller the gap, the higher the blocking effect of the height of the boss on the wheel rim. more obvious. At the same time, the upper and lower cooling performance adjustment bosses of a certain height and the corresponding wheel flanges and treads form a semi-open area in which the coolant will work; The opening B size and fluidity of the rim cooling zone) will be correspondingly smaller, and the rim will be correspondingly larger, and the tread will be less affected because it is in the middle (this can ensure the hardness of the tread and the inner side of the rim after quenching).

During work, use the quenching tool to lift the crane wheel 20 in the quenching pool for quenching, and the water passes through the gap 12 between the upper and lower cover plates to directly contact the tread 6 of the crane wheel 20 and the inner sides of the upper and lower rims for cooling; The upper and lower side spokes of the crane wheel are cooled through the water holes of the upper and lower cover plates; the water passes through the water hole 11 of the hanging pipe to cool the hub shaft hole 10 of the crane wheel 20, thereby ensuring the hardness of these positions. And due to the effect of the upper and lower mating surfaces on the upper and lower cover plates, the cooling rate of water to the upper and lower rim outer end faces of the crane wheel 20 is reduced, so that the upper and lower rims can not crack during the quenching process.

In other embodiments of the present invention: the upper and lower cover plate grooves on the upper and lower cover plates may not be provided; the upper and lower cooling performance adjustment bosses arranged on the upper and lower cover plates may also be absent; of course The upper and lower cover plates can also be ring-shaped structures. At this time, the upper and lower matching surfaces can be formed by the lower end surface of the upper cover plate and the upper end surface of the lower cover plate, and the hanging pipe can be arranged on the hanging tube on the lower cover plate. The suspenders are connected to the upper and lower cover plates through connecting beams, and there is a water gap between the connecting beams; the hanging pipes can also be replaced by other hoisting structures such as rings distributed uniformly along the circumference of the lower cover plate.

Claims (5)

1. a crane wheel quenching frock, it is characterized in that: comprise for clamping corresponding crane wheel, lower cover, described is upper, lower cover is provided with towards relatively and be respectively used to upper with crane wheel, lower rim outer face closely cooperate with quench time reduce water on, the speed of cooling of lower rim outer face upper, lower mating surface, described is upper, between the outline of lower cover, be provided with for passing through for corresponding water in the time quenching, so that water is directly to upper, the gap of lower rim medial surface contact cooling, on described lower cover, be provided with the hoisting structure for corresponding suspender lifting, described hoisting structure comprises axially extension along the vertical direction, and for being threaded onto the swing pipe of wheel hub axis hole of corresponding crane wheel, the lower end of described swing pipe is fixedly arranged on described lower cover, the upper end of described swing pipe is passed by the top of described upper cover plate, on the tube wall of described swing pipe, be provided with the swing pipe water hole that is communicated with the endoporus of described swing pipe and the wheel hub axis hole of corresponding crane wheel.

2. crane wheel according to claim 1 quenching frock, is characterized in that: on described upper cover plate, be provided with in the periphery of described upper mating surface towards the upper cooling performance adjusting boss of the ring texture of lower convexity; On described lower cover, be provided with in the periphery of described lower mating surface towards the lower cooling performance adjusting boss of the ring texture of projection.

3. crane wheel according to claim 1 quenching frock, is characterized in that: on described upper cover plate, be provided with handle.

4. crane wheel according to claim 1 quenching frock, is characterized in that: on described upper cover plate, be provided with fovea superior to get out of the way the upper cover plate groove of upper side hub of corresponding crane wheel; On described lower cover, be provided with recessed to get out of the way the lower cover groove of downside wheel hub of corresponding crane wheel.

5. according to the crane wheel quenching frock described in claim 1～4 any one, it is characterized in that: on described upper cover plate, be provided with for passing through so that the water upper cover plate water hole cooling to the upside spoke of corresponding crane wheel for corresponding water in the time quenching; On described lower cover, be provided with for passing through so that the water lower cover water hole cooling to the downside spoke of corresponding crane wheel for corresponding water in the time quenching.