CN114749741A - Processing method of nonstandard bearing for heavy-duty car transmission shaft - Google Patents

Abstract

The invention discloses a processing method of a non-standard bearing for a heavy-duty car transmission shaft, which comprises the following steps: carrying out three-dimensional modeling on the non-standard bearing to be processed, and then adjusting a processing coordinate system of the three-dimensional modeling of the non-standard bearing to make the coordinate system consistent with a coordinate system of the non-standard bearing on a machine tool in actual processing; according to the size requirement of the nonstandard bearing, roughly machining the nonstandard bearing to be machined; the processing method of the non-standard bearing for the heavy-duty automobile transmission shaft utilizes drawing software to establish a space model, adjusts a processing coordinate system of three-dimensional modeling of the non-standard bearing, roughly processes the non-standard bearing to be processed according to the size requirement of the non-standard bearing, enables the processing of the non-standard bearing to be more accurate, simultaneously uses a copper wire as a tool electrode, applies 60-300V pulse voltage between the copper wire and processed material such as copper, steel or super-hard alloy and the like, and realizes linear cutting discharge to complete the processing of the non-standard bearing.

Description

A kind of processing method of non-standard bearing for transmission shaft of heavy-duty vehicle

technical field

The invention relates to the technical field of bearing processing, in particular to a processing method of a non-standard bearing for a transmission shaft of a heavy-duty vehicle.

Background technique

Non-standard bearings, in layman's terms, are bearings that do not meet the external dimensions specified by the national standard, that is, the external dimensions are different from all bearings specified by the national standard. , the batch is small, and the trial products of new R&D equipment account for the majority, but because of the non-scale and mass production, there are not many production enterprises, the cost is high, and the price is more expensive;

However, the preparation process of the existing non-standard bearings is relatively complicated, without using the drawing software to establish a spatial model, and it is impossible to complete the adjustment of the processing coordinate system of the three-dimensional modeling of the non-standard bearings. In order to solve the current technical problems, a heavy-duty Processing method of non-standard bearings for automobile transmission shafts.

SUMMARY OF THE INVENTION

In view of the deficiencies of the prior art, the present invention provides a processing method of a non-standard bearing for a heavy-duty vehicle transmission shaft, and the processing method of the non-standard bearing for a heavy-duty vehicle transmission shaft comprises the following steps:

Step 1. Perform three-dimensional modeling of the non-standard bearing to be processed, and then adjust the processing coordinate system of the three-dimensional modeling of the non-standard bearing to make it consistent with the coordinate system of the non-standard bearing in actual processing on the machine tool;

Step 2: Rough machining the non-standard bearing to be processed according to the size requirements of the non-standard bearing;

Step 3: Perform annealing and quenching and tempering heat treatment process on the non-standard bearing after rough machining, so that the hardness of the non-standard bearing reaches the heat treatment hardness of the preset workpiece;

Step 4. Perform semi-finishing on the non-standard bearing after heat treatment, and complete the processing of each outer circle on the non-standard bearing;

Step 5. According to the 3D modeling, finish machining the semi-finished non-standard bearing with a ball end mill to process a surface consistent with the 3D modeling;

Step 6: Divide the finished non-standard bearing into pads of the non-standard bearing by the method of wire cutting discharge, and complete the processing of the non-standard bearing.

Preferably, the annealing process of the non-standard bearing includes the following steps:

Step 1, establishing a reducing atmosphere in the non-oxidative heating zone, the radiant tube heating zone, the fast cooling zone and the soaking zone of the furnace body;

Step 2: When the temperature of the non-oxidative heating zone is ≥655°C, hydrogen is introduced into the furnace body from the soaking zone of the furnace body, so that the hydrogen flows to the fast cooling zone, the radiant tube heating zone and the non-oxidative heating zone of the furnace body in turn, And make the hydrogen and nitrogen fully mixed to the required reducing atmosphere range;

Step 3: Start the non-standard bearing conveying production line, convey the non-standard bearing to the preheating zone of the furnace body, and preheat the surface of the non-standard bearing;

Step 4: The non-standard bearings are sequentially transported to the non-oxidative heating zone, the radiant tube heating zone, the fast cooling zone and the soaking zone of the furnace body for annealing treatment.

Preferably, establishing a reducing atmosphere in step 2 further includes the following steps: introducing nitrogen gas into the furnace body from the soaking zone of the furnace body, so that the nitrogen gas flows to the fast cooling zone, the radiant tube heating zone and the non-oxidizing heating zone of the furnace body in turn. , to replace the oxygen in each zone, and make the oxygen content of each zone below 1010PPM.

Preferably, in step 2, before starting, the dew point temperature of the furnace body is ≤-36°C.

Preferably, the furnace body adopts a furnace lining built with carbon bricks.

Compared with the prior art, the present invention has the following beneficial effects: the processing method of a non-standard bearing for a transmission shaft of a heavy-duty vehicle uses drawing software to establish a space model, and adjusts the processing coordinate system of the three-dimensional modeling of the non-standard bearing, according to the non-standard bearing. The size of the standard bearing requires rough machining of the non-standard bearing to be processed, so that the processing of the non-standard bearing is more accurate. A pulse voltage of 60-300V is applied between them to realize wire cutting discharge and complete the processing of non-standard bearings.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

A processing method of a non-standard bearing for a transmission shaft of a heavy-duty vehicle, and the processing method of the non-standard bearing for a transmission shaft of a heavy-duty vehicle comprises the following steps:

Step 1. Perform three-dimensional modeling of the non-standard bearing to be processed, and then adjust the processing coordinate system of the three-dimensional modeling of the non-standard bearing to make it consistent with the coordinate system of the non-standard bearing in actual processing on the machine tool;

Step 2: Rough machining the non-standard bearing to be processed according to the size requirements of the non-standard bearing;

Step 3: Perform annealing and quenching and tempering heat treatment process on the non-standard bearing after rough machining, so that the hardness of the non-standard bearing reaches the heat treatment hardness of the preset workpiece;

Step 4. Perform semi-finishing on the non-standard bearing after heat treatment, and complete the processing of each outer circle on the non-standard bearing;

Step 5. According to the 3D modeling, finish machining the semi-finished non-standard bearing with a ball end mill to process a surface consistent with the 3D modeling;

Step 6: Divide the finished non-standard bearing into pads of the non-standard bearing by the method of wire cutting discharge, and complete the processing of the non-standard bearing.

Among them, the annealing process of non-standard bearings includes the following steps:

Step 1, establishing a reducing atmosphere in the non-oxidative heating zone, the radiant tube heating zone, the fast cooling zone and the soaking zone of the furnace body;

Step 2: When the temperature of the non-oxidative heating zone is ≥655°C, hydrogen is introduced into the furnace body from the soaking zone of the furnace body, so that the hydrogen flows to the fast cooling zone, the radiant tube heating zone and the non-oxidative heating zone of the furnace body in turn, And make the hydrogen and nitrogen fully mixed to the required reducing atmosphere range;

Step 3: Start the non-standard bearing conveying production line, convey the non-standard bearing to the preheating zone of the furnace body, and preheat the surface of the non-standard bearing;

Step 4: The non-standard bearings are sequentially transported to the non-oxidative heating zone, the radiant tube heating zone, the fast cooling zone and the soaking zone of the furnace body for annealing treatment.

Wherein, establishing a reducing atmosphere in step 2 also includes the following steps: introducing nitrogen gas into the furnace body from the soaking zone of the furnace body, so that the nitrogen gas flows to the fast cooling zone, the radiant tube heating zone and the non-oxidizing heating zone of the furnace body in turn, To replace the oxygen in each zone, and make the oxygen content of each zone below 1010PPM.

Wherein, before starting in step 2, the dew point temperature of the furnace body is ≤-36°C.

Among them, the furnace body adopts the lining of carbon brick masonry.

The processing method of non-standard bearings for heavy-duty vehicle transmission shafts uses drawing software to establish a spatial model, adjusts the processing coordinate system of the three-dimensional modeling of non-standard bearings, and conducts processing of non-standard bearings to be processed according to the size requirements of non-standard bearings. Rough machining makes the machining of non-standard bearings more accurate. At the same time, copper wire is used as a tool electrode, and a pulse voltage of 60-300V is applied between the copper wire and the processed material such as copper, steel or superhard alloy to realize wire cutting Discharge to complete the processing of non-standard bearings.

Example 1

The processing method of the non-standard bearing for the transmission shaft of the heavy-duty vehicle includes the following steps. First, the non-standard bearing to be processed is three-dimensionally modeled, and then the processing coordinate system of the three-dimensional modeling of the non-standard bearing is adjusted to make it match the actual processing. The coordinate system of the non-standard bearings on the machine tool is the same; then according to the size requirements of the non-standard bearings, the non-standard bearings to be processed are subjected to rough machining, and then the rough-machined non-standard bearings are subjected to annealing and quenching and tempering. The hardness of the standard bearing reaches the heat treatment hardness of the preset workpiece, and the non-standard bearing after heat treatment is semi-finished to complete the processing of each outer circle on the non-standard bearing. The semi-finished non-standard bearing is finished and processed to produce a surface that is consistent with the three-dimensional modeling. The finished non-standard bearing is divided into non-standard bearing pads by the method of wire cutting discharge, and the non-standard bearing is completed. Machining of bearings.

Example 2

When annealing non-standard bearings, first establish a reducing atmosphere in the non-oxidative heating zone, radiant tube heating zone, fast cooling zone and soaking zone of the furnace body; The hydrogen is introduced into the furnace body at the soaking zone, so that the hydrogen flows to the fast cooling zone, the radiant tube heating zone and the non-oxidizing heating zone of the furnace body in turn, and the hydrogen and nitrogen are fully mixed to the required reducing atmosphere range; The standard bearing conveying production line transports the non-standard bearings to the preheating area of the furnace body, and preheats the surface of the non-standard bearing; the non-standard bearings are sequentially conveyed to the non-oxidative heating area, radiant tube heating area, fast heating area, etc. of the furnace body. The cold zone and soak zone are annealed.

Wherein, establishing a reducing atmosphere also includes the following steps: introducing nitrogen gas into the furnace body from the soaking zone of the furnace body, so that the nitrogen gas flows to the fast cooling zone, the radiant tube heating zone and the non-oxidizing heating zone of the furnace body in turn to replace each zone. The oxygen content of each zone should be below 1010PPM. Before starting, the dew point temperature of the furnace body should be ≤-36℃.

Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, and substitutions can be made in these embodiments without departing from the principle and spirit of the invention and modifications, the scope of the present invention is defined by the appended claims and their equivalents.

Claims (5)

1. a processing method of non-standard bearing for heavy-duty vehicle transmission shaft, is characterized in that, the processing method of non-standard bearing for this heavy-duty vehicle transmission shaft comprises the following steps: Step 1. Perform three-dimensional modeling of the non-standard bearing to be processed, and then adjust the processing coordinate system of the three-dimensional modeling of the non-standard bearing to make it consistent with the coordinate system of the non-standard bearing in actual processing on the machine tool; Step 2: Rough machining the non-standard bearing to be processed according to the size requirements of the non-standard bearing; Step 3: Perform annealing and quenching and tempering heat treatment process on the non-standard bearing after rough machining, so that the hardness of the non-standard bearing reaches the heat treatment hardness of the preset workpiece; Step 4. Perform semi-finishing on the non-standard bearing after heat treatment, and complete the processing of each outer circle on the non-standard bearing; Step 5. According to the 3D modeling, finish machining the semi-finished non-standard bearing with a ball end mill to process a surface consistent with the 3D modeling; Step 6: Divide the finished non-standard bearing into pads of the non-standard bearing by the method of wire cutting discharge, and complete the processing of the non-standard bearing. 2. The processing method of a non-standard bearing for a heavy-duty vehicle drive shaft according to claim 1, wherein the annealing process of the non-standard bearing comprises the following steps: Step 1, establishing a reducing atmosphere in the non-oxidative heating zone, the radiant tube heating zone, the fast cooling zone and the soaking zone of the furnace body; Step 2: When the temperature of the non-oxidative heating zone is ≥655°C, hydrogen is introduced into the furnace body from the soaking zone of the furnace body, so that the hydrogen flows to the fast cooling zone, the radiant tube heating zone and the non-oxidative heating zone of the furnace body in turn, And make the hydrogen and nitrogen fully mixed to the required reducing atmosphere range; Step 3: Start the non-standard bearing conveying production line, convey the non-standard bearing to the preheating zone of the furnace body, and preheat the surface of the non-standard bearing; Step 4: The non-standard bearings are sequentially transported to the non-oxidative heating zone, the radiant tube heating zone, the fast cooling zone and the soaking zone of the furnace body for annealing treatment. 3. the processing method of a kind of non-standard bearing for heavy-duty vehicle drive shaft according to claim 2, it is characterized in that: establishing reducing atmosphere in step 2 also comprises the following steps, from the soaking zone of the furnace body to pass into the furnace body Nitrogen, so that nitrogen flows to the fast cooling zone, radiant tube heating zone, and non-oxidizing heating zone of the furnace body in order to replace the oxygen in each zone, and make the oxygen content in each zone below 1010PPM. 4 . The processing method of a non-standard bearing for a transmission shaft of a heavy-duty vehicle according to claim 2 , wherein: in step 2, before starting, the dew point temperature of the furnace body is ≤-36° C. 5 . 5 . The method for processing a non-standard bearing for a transmission shaft of a heavy-duty vehicle according to claim 2 , wherein the furnace body adopts a furnace lining made of carbon bricks. 6 .