JB/T 8801-2017 in English

VALID

Machining centres. Specifications

Issued on:2017-01-09
Implemented on:2017-07-01
File Format:PDF
Delivery:Via email within 1~3 business days

Price(USD)： $300.00
$291.00

Standard No:	JB/T 8801-2017
Document status:	VALID
Title in English:	Machining centres. Specifications
Title in Chinese:	加工中心技术条件
Language:	English
File Format:	Electronic (PDF)
Delivery:	Via email within 1~3 business days
Issued on:	2017-01-09
Implemented on:	2017-07-01
Superseding:	JB/T 8801-1998 Machining centres -- Specifications
Professional Classification:	JB-Machinery
Related Keywords:	safety specifications test idle operation test specification typical test procedure continuous rough machining machining center load test
Related Topics:	Technology Center Testing Instruments Water Quality Testing Center Technology hplc center technology intermediate conditions stakeout conditions Technology Center Customs acceleration condition Center blowback technology liquid center technology Technology Center Assessment Accelerate intermediate conditions Engineering Center Technology Area Chromatography Center Technology Central Work Program intermediate acceleration condition intermediate condition ms Center Technical Chromatography Technology Center Job Requirements Tech Center Changes Accelerated Conditions Intermediate Conditions Long Term Conditions Intermediate and Accelerated Conditions intermediate condition accelerated condition accelerated conditions, intermediate conditions, long-term conditions Technology Center Program Accelerated Intermediate Long-Term Conditions accelerated long-run intermediate condition Technology Center Fee accelerated, long run, intermediate conditions Technology Transfer Center Program Technology Transfer Center Agreement Technology Center Slogan Machining center tubing 2D center technology long run condition accelerated condition intermediate condition Technology Transfer Center Program Center Technology Fish Oil Technical conditions for safety protection of machining centers Technical conditions for safety protection of machining centers Machining Center International National test piece for machining center Machining center inspection parts jb/t 8801-2017

本标准规定了加工中心的设计、制造和验收要求。本标准适用于具有三个数控线性轴线或四个数控轴线，即三个线性轴线(X、Y和Z)行程至2000mm和一个回转轴线（A′或B′或C′）的加工中心。

Introduction

Standard Update and Technological Evolution

Comparison Dimensions	1998 Edition	2017 Edition
Accuracy Grade Provisions	No clear classification	Explicitly adopt GB/T 25372 V Grade Accuracy
Safety Requirements	6 Basic Clauses	New "Safety and Health" Chapter, Integrating 12 Safety Specifications
Test Items	8 Basic Tests	Added 4 new requirements including pallet load-bearing exchange test

Analysis of core technical requirements

1. Geometric accuracy control

The standard requires that the linear axis backlash of the machining center is ≤0.03mm, and the rotary axis is ≤15 arc seconds. Special provisions:

Number of important guide rail contact points ≥10 points/25mm²
Spindle taper hole contact length ratio ≥80%
Hydraulic system cleanliness ≤150mg/L

2. Idle operation test specification

Typical test procedure

Continuous 48 hours of idle operation must include:

Spindle 5 speed forward and reverse test
Each axis rapid positioning test
≥2 automatic tool change cycles
Linked axis compound motion

Temperature rise control:Bearing temperature ≤60℃, temperature rise ≤30℃

Implementation suggestions

Key points in the manufacturing process

Process	Key control points
Casting treatment	Aging treatment is required after rough machining, and important parts require secondary aging
Guide rail assembly	Contact index: full length ≥75%, full width ≥60%
Hydraulic test	1.5 times the design pressure for 0.5 hours without leakage

Acceptance Notes

The minimum setting unit test needs to be repeated at 3 different positions
The load test should include three working conditions: maximum torque/power/cutting resistance
Surface roughness of fine-machined specimens Ra≤3.2μm

More samples: QC/T 942-2021 JC/T 2453-2018 GB 18306-2015

Sample only — not a preview of JB/T 8801-2017

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