Grinding plate for ultra-fine grinding cyclic machining of steel balls and method for preparing steel balls by using grinding plate
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A technology for cyclic processing and grinding plates, which is applied in the direction of ultra-finishing machines, metal processing equipment, grinding devices, etc., can solve the problems of batch production quantity decline, poor product consistency, bruises, etc., to ensure surface quality and dimensional accuracy, Ensure consistent quality and ease the effect of flow velocity
Inactive Publication Date: 2021-04-09
AVIC HARBIN BEARING
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[0002] The bearing steel ball made of special steel is one of the main supporting parts of the main shaft bearing of military aircraft engine. Low
[0003] During the processing test, it was found that when the equipment is processing steel balls with a diameter of 15mm or more, due to the weight of the steel balls, the steel balls will directly hit the grinding plate under the action of inertia at the ball opening, causing damage to the grinding plate , the surface of the steel ball has bruises and bruises, and this process is the final process without too much allowance, so the damage on the surface of the steel ball cannot be repaired, resulting in defects in the steel ball and a decrease in batch production
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specific Embodiment approach 1
[0034] Specific embodiment one: the grinding plate of the steel ball ultra-finishing cycle processing in this embodiment, the central angle formed by the left boundary 1-2 of the opening of the grinding plate and the vertical central axis 1-3 is 40-44 degrees, and the opening of the grinding plate is The angle between the right boundary 1-1 and the vertical central axis 1-3 is 12 degrees, and the distance between the opening end of the right boundary 1-1 and the vertical central axis 1-3 is 123mm.
specific Embodiment approach 2
[0035] Embodiment 2: In this embodiment, the method of preparing steel balls by using the grinding plate of the steel ball ultra-finishing cycle processing described in Embodiment 1 is specifically carried out in the following steps:
[0036] 1. Cold stamping: Bring the polished steel material into the steel ball cold heading machine by the guide wheel, complete the cutting, send it to the center of the ball mold, and extrude to obtain the ball billet with the ring belt;
[0037] Two, annealing: carry out stress-relief annealing treatment in the heating furnace with the spherical billet obtained in step one;
[0038] 3. Light ball: put the ball billet processed in step 2 into the light ball machine for grinding to obtain a preliminary spherical steel ball;
[0039] Four, soft grinding one: adopt steel ball grinder to carry out spherical trimming to the steel ball obtained in step 3;
[0040] 5. Hot pickling: put the steel ball processed in step 4 into the acid solution for ac...
specific Embodiment approach 3
[0054] Embodiment 3: This embodiment is different from Embodiment 2 in that: the steel material in step 1 is 8Cr4Mo4V steel. Others are the same as in the second embodiment.
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Abstract
The invention discloses a grinding plate for ultra-fine grinding cyclic machining of steel balls and a method for preparing the steel balls by using the grinding plate, and relates to the field of bearing steel ball preparation. The grinding plate and the method aim to solve the technical problems that when the relatively large-size steel balls are machined, a grinding plate is easily damaged, and the surfaces of the steel balls are damages due to knock and collision. According to the grinding plate for ultra-fine grinding cyclic machining of the steel balls, the size of an opening in a ball inlet is increased, and a baffle is arranged on the side surface of an opening of the grinding plate. The method for preparing the steel balls comprises the steps of cold stamping, annealing, ball finishing, primary soft grinding, hot acid pickling, secondary soft grinding, heat treatment, hard grinding, cold acid pickling, hydrogen removal, supplementary tempering, primary grinding, fine grinding, flaw detection, ultra-fine grinding, final inspection, steel type identification, oiling and packaging. The grinding plate and the method have the advantages that the size of the opening at the ball inlet of the grinding plate is increased, so that the path distance of the steel balls before entering the grinding plate is prolonged, and the flowing speed of the steel balls is decreased; and meanwhile, the baffle is additionally arranged on the side surface of the opening, the steel balls can be prevented from bouncing out of a ball channel, and therefore the product yield is increased. The grinding plate and the method are used for preparing the bearing steel balls.
Description
technical field [0001] The invention relates to the field of bearing steel ball preparation. Background technique [0002] The bearing steel ball made of special steel is one of the main supporting parts of the main shaft bearing of military aircraft engine. Low. [0003] During the processing test, it was found that when the equipment is processing steel balls with a diameter of 15mm or more, due to the weight of the steel balls, the steel balls will directly hit the grinding plate under the action of inertia at the ball opening, causing damage to the grinding plate , The surface of the steel ball is scratched and bruised, and this process is the final process without too much allowance, so the damage on the surface of the steel ball cannot be repaired, resulting in defects in the steel ball and a decrease in batch production. Contents of the invention [0004] The invention aims to solve the technical problems that the grinding plate is prone to be damaged when process...
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