CN220116598U - Tool for reducing quenching deformation of needle roller sleeve - Google Patents

Abstract

A tool for reducing quenching deformation of a needle roller sleeve belongs to the technical field of needle roller sleeve quenching. The utility model solves the problems that the thin-wall structure of the existing needle roller sleeve is easy to deform after quenching by a resistance furnace, so that the rejection rate of the needle roller sleeve is increased and the processing cost of the needle roller sleeve is increased. The utility model comprises a core body, a bushing and a suspender, wherein the workpiece is sleeved on the core body, the core body is provided with through holes, a plurality of through holes are circumferentially arrayed on the core body, the core body is provided with suspender holes, the suspender holes are arranged above the through holes, the suspender passes through the suspender holes to be connected with the core body, and the bushing is sleeved on the core body. The quenching tool for the needle roller sleeve is simple in structure, reduces the probability of deformation of the needle roller sleeve in the quenching process, and improves the yield of workpieces.

Description

Tool for reducing quenching deformation of needle roller sleeve

Technical Field

The utility model belongs to the technical field of quenching of needle roller sleeves, and particularly relates to a tool for reducing quenching deformation of a needle roller sleeve.

Background

The material of the common needle roller sleeve is GCr15, belongs to high-carbon chromium bearing steel, is an important component of a crawler armored car traveling system, has 58-62 HRC of heat treatment hardness, has higher hardness requirement, and has small machining allowance during quenching for facilitating subsequent processing, so that the heat treatment deformation of the needle roller sleeve is very important, the heat treatment deformation is serious, the rejection rate of the quenched needle roller sleeve is easy to rise, and the machining cost of the needle roller sleeve is increased.

The capacity of the common box-type resistance furnace for controlling the deformation of parts is not as good as that of a vacuum furnace, but the resistance furnace has low price, so that the subsequent mechanical processing can not meet the drawing requirement after the heat treatment deformation caused by less machining allowance when workpieces such as needle roller sleeves are involved.

By analyzing the structure of the needle roller sleeve, the workpiece is in the shape of a sleeve with the wall thickness of 5.5mm, the thin-wall structure leads the part to be easy to deform during heat treatment, and particularly, during quenching, the deformation of the part caused by rapid cooling is majority, so that the deformation is controlled, the workpiece is preferably limited in the quenching and cooling process, and the deformation is reduced.

Therefore, the utility model provides a tool for reducing the deformation of the needle roller sleeve after quenching, which has a simple structure and is used for solving the problems.

Disclosure of Invention

The utility model aims to solve the problems that after the existing needle roller sleeve is quenched by a resistance furnace, the thin-wall structure of the needle roller sleeve is easy to deform, so that the rejection rate of the needle roller sleeve is increased and the processing cost of the needle roller sleeve is increased. The following presents a simplified summary of the utility model in order to provide a basic understanding of some aspects of the utility model. It should be understood that this summary is not an exhaustive overview of the utility model. It is not intended to identify key or critical elements of the utility model or to delineate the scope of the utility model.

The technical scheme of the utility model is as follows:

a tool for reducing quenching deformation of a needle roller sleeve comprises a core body, a bushing and a suspender, wherein a workpiece is sleeved on the core body, through holes are formed in the core body in a machining mode, a plurality of through holes are circumferentially arrayed in the core body, suspender holes are formed in the core body in a machining mode and are arranged above the through holes, the suspender penetrates through the suspender holes to be connected with the core body, and the bushing is sleeved on the core body.

Further, a step boss is machined on the core body and used for supporting a workpiece, and a lining is sleeved on the outer side of the step boss.

Further, the upper end face of the core body is processed with a chamfer, and the chamfer is arranged on the opposite side of the stepped boss.

Further, the suspender is a 45 steel rod suspender, and the suspender penetrates through a suspender hole of the core body to be connected with the core body in a welding mode.

Further, the upper end face of the bushing is provided with a copper plate, and the copper plate is in contact with the workpiece.

The utility model has the following beneficial effects:

1. the tool for reducing the deformation of the needle roller sleeve is simple in structure, a needle roller sleeve workpiece which is quenched and insulated is taken out of a box-type furnace and sleeved on a core body, and then the needle roller sleeve workpiece is placed in quenching oil, so that the roundness of the workpiece is ensured under the action of the core body, and the problem that the workpiece is contracted to be elliptical is avoided.

2. The tool for reducing the deformation of the needle roller sleeve is simple in structure, reduces the deformation of the needle roller sleeve according to the structure of the needle roller sleeve, improves the qualification rate of workpieces, reduces the production cost of the needle roller sleeve, and ensures that quenching oil can be filled in the inner cavity of a core body due to the fact that the through holes are further formed in the core body.

Drawings

FIG. 1 is a schematic view of a tooling structure for reducing deformation of a needle hub;

FIG. 2 is a top view of the core;

fig. 3 is a cross-sectional view of the core.

In the figure, the core body, the bushing, the hanger rod, the workpiece, the through hole, the hanger rod, the 7-step boss, the chamfer and the copper plate are 1-core body, 2-bushing, 3-hanger rod, 4-workpiece, 5-through hole, 6-hanger rod hole, 7-step boss, 8-chamfer and 9-copper plate.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, the present utility model is described below by means of specific embodiments shown in the accompanying drawings. It should be understood that the description is only illustrative and is not intended to limit the scope of the utility model. In addition, in the following description, descriptions of well-known structures and techniques are omitted so as not to unnecessarily obscure the present utility model.

The connection mentioned in the present utility model is divided into a fixed connection and a detachable connection, wherein the fixed connection (i.e. the non-detachable connection) includes, but is not limited to, a conventional fixed connection manner such as a hemmed connection, a rivet connection, an adhesive connection, a welded connection, etc., and the detachable connection includes, but is not limited to, a conventional detachable manner such as a threaded connection, a snap connection, a pin connection, a hinge connection, etc., and when the specific connection manner is not specifically limited, at least one connection manner can be found in the existing connection manner by default, so that the function can be realized, and a person skilled in the art can select the connection according to needs. For example: the fixed connection is welded connection, and the detachable connection is hinged connection.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

Embodiment 1, with reference to fig. 1-3, illustrates a tool for reducing deformation of a needle roller sleeve in this embodiment, including a core 1, a bushing 2 and a suspension rod 3, a workpiece 4 is sleeved on the core 1, through holes 5 are machined in the core 1, a plurality of through holes 5 are circumferentially arrayed on the core 1, suspension rod holes 6 are machined in the core 1, the suspension rod holes 6 are arranged above the through holes 5, the suspension rod 3 is connected with the core 1 through the suspension rod holes 6, and the bushing 2 is further sleeved on the core 1.

The core 1 is made by cold rolling 45 steel pipe processing, the circumference evenly distributed's through-hole 5 is processed on core 1, the total processing of core 1 is three rows of through-holes 5, the quantity of every row of through-hole 5 is six, the bottom processing of core 1 has ladder boss 4, the up end processing of core 1 has chamfer 8, chamfer 8's effect is even frock and work piece lead to inside and outside diameter size to be close because of the cooperation requirement, also can be smoothly with work piece 4 suit on core 1, the ladder boss 4 of core 1 bottom is used for cooperating with the protruding part of work piece 4, hold in the palm work piece 4, the jib 3 is fixed on core 1 through welded mode, the jib 3 also adopts 45 steel bar material preparation to get final product.

When the quenching device is used, the core body can be quickly transferred by hooking the suspender 3 through the furnace, quick quenching is realized, the core body 1 sleeved with the workpiece 4 is placed into quenching oil for cooling, the inner cavity of the core body 1 is filled with a plurality of through holes 5 on the core body 1 for quenching, the quenching quality of the workpiece 4 is guaranteed, after the quenching of the workpiece 4 is finished, the workpiece 4 and the core body 1 are locked due to expansion and contraction of heat and cold of the workpiece 4, when the problem of difficult disassembly is caused, the lining 2 is placed on the ground, the core body 1 is placed on the lining 2, the diameter of the core body 1 is smaller than the inner diameter of the lining 2, the workpiece 4 on the core body 1 is contacted with the end face of the lining 2, the workpiece 4 can be disassembled from the core body 1 by knocking the core body 1, and a layer of copper plate 9 is further arranged on the upper end face of the lining 2 for avoiding damage to the workpiece, friction generated between the workpiece 4 and the core body 1 is reduced under the effect of the copper plate 9, and the damage to the workpiece 4 is reduced.

Different from other heat treatment tools, the needle sleeve quenching tool can be carried out at room temperature, the service life of the tool is greatly prolonged relative to other heat treatment tools, the use of expensive heat-resistant steel can be avoided, the common carbon steel is selected, the production cost is reduced, and the benefit is improved.

The present embodiment is only illustrative of the present patent and does not limit the scope of protection thereof, and those skilled in the art can also change the part thereof, which is within the scope of protection of the present patent without exceeding the spirit of the present patent.

Claims (5)

1. A frock for reducing bearing pin cover quenching deformation, its characterized in that: including core (1), bush (2) and jib (3), work piece (4) suit is on core (1), and processing has through-hole (5) on core (1), and a plurality of through-holes (5) circumference array is on core (1), and processing has jib hole (6) on core (1), and jib hole (6) are arranged in the top of through-hole (5), and jib (3) pass jib hole (6) and are established to be connected with core (1), still the cover is equipped with bush (2) on core (1).

2. The tooling for reducing quenching deformation of the needle roller sleeve according to claim 1, wherein: the core body (1) is provided with a step boss (7), the step boss (7) is used for supporting a workpiece (4), and the outer side of the step boss (7) is sleeved with a bushing (2).

3. The tooling for reducing quenching deformation of the needle roller sleeve according to claim 2, wherein: the upper end face of the core body (1) is provided with a chamfer (8), and the chamfer (8) is arranged on the opposite side of the stepped boss (7).

4. A tooling for reducing quench distortion of needle roller sleeves as set forth in claim 3 wherein: the suspender (3) is a 45 steel bar suspender, and the suspender (3) passes through a suspender hole (6) of the core body (1) to be connected with the core body (1) in a welding mode.

5. The tooling for reducing quenching deformation of the needle roller sleeve according to claim 1, wherein: the upper end face of the bushing (2) is provided with a copper plate (9), and the copper plate (9) is in contact with the workpiece (4).