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Process method for manufacturing mover rod of linear motor control rod drive mechanism

A technology of a linear motor and a driving mechanism is applied in the field of manufacturing process of the mover rod of the linear motor control rod driving mechanism, which can solve the problems of unstable precision, large removal amount, uneven cutting, etc. Simple method and improved cutting performance

Active Publication Date: 2017-08-08
SICHUAN HUADU NUCLEAR EQUIP MFR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 1) The straightness after deep hole machining is not high, the cutting is uneven and the cutting residual stress is large when machining the outer circle, which is easy to cause the accuracy drop caused by the stress release in the later stage;
[0006] 2) When ordinary lathes process the shape, due to the complex shape, large amount of removal, large cutting stress, and easy deformation, the cutting amount is mostly carried out in the way of low feed and multiple tool passes, resulting in low processing efficiency and unstable manufacturing accuracy;
[0007] 3) Due to the unstable accuracy of the previous process and unreliable processing standards, it is easy to cause non-conformities in the accuracy of the finished product of CNC lathe, which increases the manufacturing cost

Method used

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  • Process method for manufacturing mover rod of linear motor control rod drive mechanism
  • Process method for manufacturing mover rod of linear motor control rod drive mechanism
  • Process method for manufacturing mover rod of linear motor control rod drive mechanism

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Such as Figure 1 to Figure 4 shown.

[0048] A manufacturing process method for a mover rod of a linear motor control rod drive mechanism, comprising the following steps:

[0049] Step 1: Cut the material and obtain the rough material of the mover rod;

[0050] Step 2: annealing treatment of raw materials, annealing treatment after heating the coarse material of the mover rod;

[0051] Step 3: rough machining the outer circle to see the light; process the annealed mover rod rough material to form a cylindrical material with preliminary processing standards;

[0052] Step 4: Drill a deep hole, and drill a hole in the cylindrical material to form a deep hole 1 in the center;

[0053] Step 5: Correcting the outer circle deviation of the rough car, taking the deep hole 1 in the center as the reference, and using the double top car to perform the outer circle deviation correction;

[0054] Step 6: semi-finishing shape, with the hole as the reference, semi-finishing the sh...

Embodiment 2

[0066] Example 2, the difference between this example and Example 1 is that after experiments, preferably, the specific process of step 2 is: heating the mover rod coarse material to 860°C to 880°C, keeping it warm for at least 120 minutes, and then Or cool at a rate equal to 40°C / h to 640°C to 660°C, hold for at least 10 minutes, then heat to 750°C to 770°C, hold for at least 120 minutes and then air cool.

[0067] Under the above annealing treatment parameters, the coaxiality of the inner and outer circles is high, and the coaxiality of the total length and the positioning reference is controlled within φ0.1;

[0068] The dimensions of each segment of the outer circle are stable, the radial dimension tolerance zone is within 0.015, the axial dimension tolerance zone is within 0.05, and the dimension tolerance of any 5 ring teeth meets the requirements of 114±0.06. Mass production can greatly improve product qualification rate and production efficiency ; Separation of rough a...

Embodiment 3

[0071] Example 3, the difference between this example and Example 1 is that after experiments, preferably, the specific process of step 2 is: heating the coarse material of the mover rod to 870°C, keeping it warm for at least 120 minutes, and then heating it at a temperature less than or equal to 40°C. Cool at ℃ / h speed to 650℃, keep warm for at least 10 minutes, then heat to 760℃, keep warm for at least 120 minutes and then air cool.

[0072] Under the above annealing treatment parameters, the coaxiality of the inner and outer circles is high, and the coaxiality between the full length and the positioning reference is controlled within φ0.08;

[0073] The dimensions of each segment of the outer circle are stable, the radial dimension tolerance zone is within 0.015, the axial dimension tolerance zone is within 0.05, and the dimension tolerance of any 5 ring teeth meets the requirements of 114±0.06. Mass production can greatly improve product qualification rate and production ef...

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Abstract

The invention discloses a linear motor control rod drive mechanism rotor lever manufacturing technological method. The method comprises the steps that 1, blanking is carried out to obtain a rotor lever coarse material; 2, raw material annealing treatment is carried out, wherein annealing treatment is carried out on the rotor lever coarse material which is heated; 3, rough machining and external circle polishing are carried out, wherein the annealed rotor lever coarse material is machined to form a cylindrical material; 4, a deep hole is drilled, wherein a hole is drilled in the cylindrical material to form the center deep hole; 5, rough cylindrical turning and deviation rectifying are carried out; 6, appearance semi-finish turning is carried out; 7, the size is treated stably, and the cylindrical material processed in the step 6 is placed in a heating furnace to be heated; 8, external circle grinding benchmark grinding is carried out; 9, precise tooth profile turning is carried out; 10, trisection slots are vertically formed in the gear milling face in the axial direction.

Description

technical field [0001] The invention relates to the technical field of manufacturing a mover rod of a linear motor control rod drive mechanism, in particular to a manufacturing process method for a mover rod of a linear motor control rod drive mechanism. Background technique [0002] All kinds of reactor control rod drive mechanisms (hereinafter referred to as CRDM) are mostly slender components, with slender core deep holes processed in the core, such as mover rods, sealing shells, travel sleeves, etc. The inner hole of this kind of parts is long, the outer circle has coaxiality requirements for the holes, and the outer circle size and shape accuracy requirements are high. Manufacturing adopts conventional methods such as deep hole drilling, CNC lathe, and grinding. Problems such as large deformation, unstable size, and low processing efficiency often occur during processing, and it is difficult to meet the geometric accuracy and roughness requirements of the parts. The mo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23P15/00
CPCB23P15/00
Inventor 王学良蒋坤
Owner SICHUAN HUADU NUCLEAR EQUIP MFR