3.8.1 Measures casing pressure test on the seat, the seal with a maximum allowable leak rate API598 3.8.2 a. Maximum allowable leak rate of liquid valve specification DN ≤50 65 ~ 150 200 ~ 300 ≥350 maximum allowable leak rate mm3 / s 0 12.5 20.8 29.2 drops / S 0 0.2 0.4 0.5 b. The maximum allowable gas valve leak rate specification DN ≤50 65 ~ 150 200 ~ 300 ≥350 maximum allowable leak rate mm3 / s 0 25 42 58 drops / S 0 N = Qn1 + a% + b% = 100 × 1 × 1 + 5% + 1% / year = 106 / year annual output flange 106 / year, first through accounting, the part quality is about 1.34kg. Materials produced in accordance with Table 3-3 outlines the type of contact with the produce. May conclude that its production volume type is produced in small quantities. Note: The quality of the parts is usually less than 100kg for medium parts, more than 100kg of heavy parts. Flanges quality as a result of 1.34kg. So the flange attributed lightweight parts. Second, check the skills of 2.1 parts drawings, structural analysis from the flange part in supporting and guiding role in CNC machine tools, is the rotary part. By cylindrical, round, face constitute the primary appearance. By F face positioning, the three bolts to complete precise coupling flange. 3-Φ16.5 hole both for bolting holes. 2.2 parts analysis skills needs to know from the figure, their information is HT150, the quality of 1.34kg. The material has a high strength, wear resistance, heat resistance and shock absorption, apply to withstand greater stress and wear parts needs. ① cylindrical Φ80h11, Ra = 1.5μm; Φ120 ± 1, Ra = 3.2μm; Φ52g6, Ra = 1.6μm ② round hole Φ, its Φ52g6 coaxial 0.04 ③ ④ face C and end face of the E intervals 60mm; A plane and C surface spacing 47mm, = 1.6m; axis section and the great circle distance; oblique hole Φ4 and Φ52g6 axis flip for. Third, the selection of parts based on the information HT150 conclude rough castings, also known as 106 parts produced in the outline / year. The part on the quality of 1.3Kg. We can see the outline of its production of small batch production. Approach to the choice of casting blank Durable cast appearance. In addition, to eliminate residual stresses, should arrange artificial aging after casting. 3.1 Castings Castings Gongyi Gongyi is 12, and so the small quantities produced by casting blank manufacturing durable choice. Gongyi rating for CT9 grade machinery manufacturing skills programs "Cookbook" P38, pick the wrong box casting is 0.1mm. 3.2, casting machining allowances for castings produced in large quantities in the investigation allowance "machinery manufacturing skills supplementary materials" P359 ~ 360 too, the selection grade accuracy for three. Casting position overall appearance of each machining parts specification mm mm margin sided allowance mm castings mm specification fault mm four skills program rules 4.1, positioning reference datum selection ⑴ fine selection of both the outer flange of the device reference , but also a program benchmark. To avoid the mistake occurred because the benchmarks do not coincide, the choice of cylindrical as positioning reference, namely compliance with "benchmarks coincidence" criteria. Specifically, the election and A cylindrical end face as a fine reference. ⑵ crude benchmark chosen because all outer flange are processing needs, while both the highest precision cylindrical wall thickness of the thinnest appearance is to ensure that the processing requirements. A solid-election and the end surface of the outer rough benchmark. 4.2 parts machined surface appearance and processing methods selected flange also cylindrical, bore, face, grooves and holes and so on. Information for HT150, see "machinery manufacturing skills programs Cookbook" relevant information, its processing methods are as follows: ⑴80mm outer surface; Gongyi class IT11. The appearance of roughness Ra1.6, need roughing semi-refined car ------ ------ Table 1.4-6 fine cars. ⑵1201mm outer surface; not note Gongyi norms, according to GB1800-79 rules Gongyi grade security IT10 its appearance roughness Ra3.2, need roughing ------ semi-refined car. ⑶52mm outer surface; Gongyi rating IT6 appearance roughness Ra1.6, area: semi-refined car roughing ------ ------ fine cars ⑷62.4mm, 620.015 bore; for not note Gongyi specification. Gongyi rating based on GB1800-79 rules IT7 appearance roughness Ra1.6, blank holes have been cast. Table 1.4-7 based processing approach can be used: semi-refined crude Boring Boring ------ ------ fine boring. ⑸ bore; for not note Gongyi norms, rules based GB180-79 Gongyi grade IT7, the appearance of roughness Ra1.6, has been forging a blank. Table 1.4-7 based processing approach can be used: semi-refined crude Boring Boring ------ ------ ----- fine boring or grinding holes, etc. broaching processing needs can be satisfied. Because processing 62.4mm, with Boring way, solid choice: semi-refined crude Boring Boring ------ ------ fine boring. ⑹ end face; end face specification accuracy is not high demand, the appearance of roughness Ra1.6, Ra3.2, Rz50, three kinds of demand, demand Ra1.6's face: semi-refined car roughing ----- ----- - fine cars. Demand Ra32's face: roughing ------ semi-refined car. Demand Ra250's face: roughing to table 1.4-8. ⑺ groove; width and groove depth of Gongyi grades were IT13 and IT14, the appearance of roughness were Rz50, Ra3.2, should be chosen: see Table 1.4-8. ⑻ internal thread; usually fine thread, the appearance of roughness Ra3.2, accuracy rating for IT6, tapping can be. ⑼3-11 inner circle appearance of roughness Rz50, the need for drilling lookup table 14-7. ⑽ blind holes and oblique hole 4, does not indicate the appearance of roughness specification Gongyi Ra50, only needs drilling. ⑾ plane F; Gongyi class IT11, the appearance of roughness Ra3.2, need: Roughing ------ semi-precision milling. ⑿ plane G; not indicate Gongyi. According to GB1800-79 rules Gongyi grades IT12 its appearance roughness Ra50, need to rough milling. 4.3 develop skills away: Flanges processing skills carried away is usually the first cylindrical bore machining process further. Processed in accordance with the first plane and coarse and fine after the first criteria. Cylindrical processing can be carried out in accordance with the following skills from: Skills from a station a casting blank section 2 section 3 aging disposal, processing process step 10: 52g6 cylindrical and end positioning, roughing other end face C surface. Roughing cylindrical 80h11 and stepped D surface, rough boring 62.4,62 ± 0.015,58, chamfer 1 × 30 °, 1 × 45 °. Step 20: In roughing 80h11 cylindrical and face C positioning the other end face of the E-plane roughing, roughing and stepped cylindrical 52g6 A face, rough boring, chamfering. Step 30: OD and face orientation to 80h11 after roughing, semi-finishing second end surface of the E-plane, semi-finishing of cylindrical 52g6, semi-finishing 120 ± 1 and the A side step, semi-fine boring 62.4,62 ± 0.0015 chamfer 1 × 30 and 1 × 45 angle. Processing internal thread is outside the circle 52g6 and the A side positioning reference, in order to ensure a very good position accuracy between them, when tapping inside. Cylindrical 52g6 finishing first and the A side. Step 40: In 52g6 cylindrical and end A semi-intensive car after positioning; semi-finishing of cylindrical 80h11, face C face and stepped surface D surface finishing, semi-finishing boring 62.4,62 ± 0.0015, grooving, chamfering 1 × 30 and 1 × 45 angle. Step 50: In 80h11 cylindrical and end location; 52g6 fine cars and fine cars stepped cylindrical surface A surface, fine boring, chamfering 1 × 45. Step 60: After finishing with 52g6 we are doing all kinds of integrated business management consulting business management consulting organization Contact: Miss Hao Mobile: 13851787257 Telephone and Fax: 025-83619622 E-mail: 980837454@QQ.Com QQ: 1445404680 Company Website: http: //www.sjzxnj.com/ Address: Qixia District and Yan Jinhua Road, Room 1602, Building 289