1. Method of making QC engineering drawings: 1. What are QC engineering drawings (reference samples)? The control points (controlled items and spot checks) and management methods of a product from raw materials to finished products are defined by charts, also called control plans.
2. QC engineering drawing practice 1. All the selected products and their items and symbols (1) or key items are approved by the senior supervisor.
3.(2) The selected projects are subdivided into unit projects according to operators or methods.
4, (3) cooperate with the manager's scope of responsibilities, clear engineering distinction.
5.(4) Symbolic meaning (if symbolic representation is needed) Operation, quality inspection, quantity inspection, transportation, stagnation and storage 2. Review control points (control items and spot checks) (1) Select control items according to important process items.
6.(2) Select spot check items according to the process spot check items (methods to prevent mistakes as much as possible).
7.3. Review the management method (including sampling) (1) management chart-abnormal detection management chart, which is used to analyze the data of countermeasure change and determine the management responsibility.
8.(2) Sampling method-check the period, time, sampling method and sample number.
9.(3) Determination method-use measuring instruments or official inspection.
10, (4) Disposal measures-abnormal judgment basis, abnormal handling and responsibility.
1 1, 4. Review the additions and revisions of relevant standards 5. It is recorded in QC engineering drawing (1), and each item is recorded item by item.
12 and (2) shall be recorded and reconfirmed by relevant personnel.
13, 6. After the QC engineering drawing is completed, it shall be finally approved by relevant supervisors and senior supervisors, and may be adjusted or modified if necessary.
14, three. Setting method of control points in process control 1 Where and what are the control points in the process is the key to effective and smooth process control.
15, 2. General control points can be divided into (1) setting method of controlled items 1). Briefly describe what the unit project does (what).
16,2) Define the purpose and task of the project with the topic "Why this project is needed".
17,3) In the way of "why-why", it can clearly relate the quality characteristics of the final product and correctly reflect the quality of the process.
18,4) For 2) and 3), set the evaluation characteristic with measurable degree of goal realization as the control item.
19,5) If the selected controlled project cannot be quantified or measured, it can be selected from the quantifiable alternative characteristics related to the project, such as smoothness, whose alternative characteristics include friction coefficient and number of concave-convex points per unit ... 6) Try to choose the intermediate proxy characteristics that can quickly know the results, so as to find anomalies in time, such as metal strength, in which the intermediate proxy characteristics can be thickness and density.
20, 7) Try to make use of the repeated exploration of the upper and lower functions to make the relationship between them more clear and can run through all.
2 1, (2) setting method of spot check project 1) subdividing the unit project into element operations 2) listing the conditions required for 4M in each element operation, so as to reduce the omission of major factors, such as the conditions, abilities and cognition that people should have for this operation.
22. Materials: the characteristic values and specifications of parts, materials and semi-finished products.
23.3) Review the influence of various situations on the controlled projects, and set the projects with greater influence as routine inspection projects, instead of taking all reasons as routine inspection projects.
24, check the project as specific as possible, such as improper construction-improper how to judge? Improper: judgment must have norms, methods or conditions.
25, easy to make mistakes or involving human attention, negligence, try to use the fool-proof method.
26. The person in charge of the actual operation should participate in the setting of the spot check project.
27.QC Engineering Drawing 1 Matters needing attention in production and application. In addition to quality, recorded items can also include quantity and cost; Besides formal works, it can also include preparatory work.
28.2. The addition and revision of standards after process analysis should be reflected in the quality control engineering drawing.
29. 3. Control points should be checked regularly for suitability; Or if the process is abnormal, it is necessary to check whether it is appropriate or not, and continue PDCA.
30.4. From the operator's point of view, review the cycle and form of management methods to facilitate the actual inspection (spot check).
3 1. Based on QC engineering drawings, work instructions are formulated according to operation standards, and personnel's independent management is strengthened.