Internal spiral face processing equipment and its processing technology

Abstract

The present invention discloses one kind of inner helical surface machining apparatus and process. The machining apparatus includes one milling machine and one broaching machine. The milling machine for rough machining includes one machine body, one cutter bar with cutter and driving shaft connected to the cutter, one first driving mechanism connected to the driving shaft, one turbine with one through hole for the workpiece to penetrate through coaxially with the cutter bar and one second driving mechanism connected to the turbine. The broaching machine is for the finish machining of the inner helical surface. The present invention has high inner helical surface machining precision, and high machining efficiency.

Description

technical field [0001] The invention designs a processing device and a processing technology for a screw drilling tool stator shell, and specifically relates to a processing device and a processing technology for an inner helical surface. Background technique [0002] The screw drilling tool is the most widely used drilling tool in oil drilling at home and abroad, and the motor part in the drilling tool is one of the keys. It is directly related to the service life and working efficiency of the entire drilling rig, but it is troubled by the product quality. The key problem that has not been solved so far is the uneven thickness of the rubber lining in the stator shell of the screw drilling tool. As shown in Figure 1, the cavity in the stator shell is a cylindrical surface, and the cross section of the rotor is a helical surface. There is a rubber layer between the body and the rotor, resulting in uneven thickness of the rubber layer. Due to the uneven thickness of the rubber...

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Problems solved by technology

[0002] The screw drilling tool is the most widely used drilling tool in oil drilling at home and abroad, and the motor part in the drilling tool is one of the keys. It is directly related to the service life and working efficiency of the entire drilling rig, but it is troubled by the product quality. The key problem that has not been solved so far is the uneven thickness of the rubber lining in the stator shell of the screw drilling tool. As shown in Figure 1, the cavity in the stator shell is a cylindrical surface, and the cross section of the rotor is a helical surface. There is a rubber layer between the body and the rotor, resulting in uneven thickness of the rubber layer. Due to the uneven thickness of the rubber layer, the following defects will be caused: 1. Because the thermal expansion coefficient of the rubber is too large, the spiral shape after injection and the mold The helical shape changes, resulting in poor sealing; 2. In order to obtain the helical shape required by the technology, it is necessary to use rubber instead of metal to fill the helical convex surface, so that the diameter of the rotor that matches it is reduced, thereby reducing 3. Under the condition that the ratio of the difference in rubber thickness is large, when the rotor is operating as a planet during work, the yield variation of the compressed rubber is inconsistent, causing the motor to move unstable and noisy

[0003] In order to obtain uniform thickness of rubber and internal helical shape, as shown in Figure 2, it is necessary to process the cylindrical surface in the stator housing into an internal helical surface, so as to solve the above technical problems, but there is currently no related processing equipment in China And the processing technology can process the cylindrical surface in the stator shell into an internal helical surface. Therefore, how to solve the problem of obtaining an internal helical shape in the stator shell and making the inner rubber layer uniform in thickness is the current problem faced by various petroleum machinery manufacturers. important question

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