The schedule is an important part of the mold drawing. It is a key document that guides the procurement and manufacturing work of the logistics department and the production department. It contains the type, serial number, part name, material, standard code, specification and quantity of all parts in the mold design drawing And other information. Regardless of the two-dimensional mold design method or the three-dimensional solid design, the schedule is an indispensable part.
At present, through technological innovation, our company has basically realized the parametric physical design of the mold, but for the production of the detailed list, it also adopts the method of two-dimensional design and manual compilation. There are many shortcomings in the use process, and urgent improvement is needed to realize the automatic generation of the detailed list. To this end, we set up a technical research team (QC). Through continuous research and analysis, we finally successfully solved this problem and realized the automatic generation of the mold schedule.
Manual preparation method
(1) Import standard templates. The templates are divided into 8 tables. The contents are as follows: cast and embedded parts, purchased materials, general self-made parts, self-made standard parts, outsourced standard parts, purchased standard parts, and punching Such outsourcing standard parts and fasteners.
(2) The designer enters the information of each part into the table by category.
2. There are many drawbacks
(1) The designer has a lot of labor and low design efficiency. The parameters of the parts need to be entered by the designer. There are dozens or even hundreds of parts in a set of molds, which requires a lot of labor and a lot of time, which affects the design speed.
(2) The error rate is high. Due to the large number of parts, the person who enters the list is prone to fatigue, and the number of parts is prone to enter errors or even drop parts.
(3) The part names are confused. Different designers enter different names for the same parts, which causes confusion in production.
(4) There is waste. The 8 tables of the schedule need to be printed with a plotter, and the 8 tables are on the same drawing.
In short, the low efficiency and high error rate of the manual method of preparing schedules seriously restrict the design and manufacture of molds. More than 60% of the abnormal problems in production are caused by errors in the schedule. Therefore, improving the compilation method of the schedule and realizing the automatic generation of the schedule is the inevitable development direction of mold design.
Research on the Method of Automatically Generating List
1. Introduction of adding standard part attributes
Adding the attributes of standard parts is the basis for the automatic generation of the detailed list. Attributes are mainly used to define the columns in the schedule, such as figure number, name and material, for reference when generating the schedule. Each attribute is composed of two parts: the attribute title and the attribute value. Attributes are inherited. In visual assembly, when multiple assemblies refer to the same part, the attributes of the part are inherited by multiple assemblies. But when the part is an object in the assembly, we can assign object properties to it in the assembly. There are two attributes in UG, one is System Attributes and the other is User-Defined Attributes.
The system attribute is the attribute that can be recognized by the UG system itself, with the letter $ in front of it. You can often see system properties in Listing Windows, such as Name, Color, Layer, and Width. By default, the system property Name is the component name (see Figure 1).
Figure 1 Part system properties
User-defined attributes are attributes specified by users for parts, objects, and reference sets. There are 3 types of part attributes, object attributes and reference set attributes. The attribute we need to add is the part attribute. The established part attribute belongs to the current working part. Therefore, when specifying the part attribute in the assembly, the part must be turned into a working part. When defining component attributes, you should first understand which columns are in the schedule and what data to fill in each column, and then determine which attributes are defined for the component.
There are two ways to open the part properties window:
(1) Open a standard part→open Assembly Navigator→select the standard part and right-click→Properties→Attributes.
(2) Open a certain standard →File →Properties→Attributes.
There are two parts of the component properties that need to be filled (see Figure 2): the property title (Title) and the property value (Value).
Figure 2 Input of attribute title and attribute value
(1) The definition rule of the attribute title (Title): It can have up to 50 characters; there can be no letters $; there can be spaces in between; regardless of whether the input letters are uppercase or lowercase, the system automatically converts them to uppercase.
The attribute title is equivalent to the pointer in “Computer Science”, and the created attribute title is the attribute title required to be input in the establishment of the schedule. All components in an assembly must be strictly consistent with the component attribute headings in the same column in the schedule, otherwise the schedule cannot be indexed. The attribute value (Value) allows up to 132 characters. The following is an example of standard parts cast into a lifting rod.
①Open the properties window.
②Enter the part name in the Title column, as shown in Figure 2.
③Enter the value of the attribute (Value), and enter “cast into the lifting rod”, as shown in Figure 2.
④ Click Apply. In the same way, enter other attribute titles (Title) and attribute values (Value), confirm (OK) that the input is correct, close the attribute window, and save.
2. The establishment of the schedule template The establishment of the schedule template must ensure the standardization and consistency of the schedule. Make the generated schedule easy to use. Usually the establishment method is as follows:
(1) Open an assembly file arbitrarily, and there must be assembly parts with attributes in the file.
(2) Enter the Drafting module. (3) Insert→Parts List→Insert the parts list (see Figure 3).
Figure 3 Insert the parts list into the schedule
(4) Use commands such as insert column cells and merge cells to edit the table, as shown in Figure 4.
Figure 4 Editing the schedule
(5) Enter the title bar as shown in Figure 4 (see the 4-row cells shown in Figure 4).
(7) Annotation Style → Columns → Attribute Name → select part name, uncheck Key Field → OK. By analogy, set other columns in the same way.
(8) Adjust the width of the column where the mark is located to make the column width zero.
(9) Select the entire table, right-click →Save As Template→Save the template MXB.prt.
3. Use of schedule
After the mold entity design is completed, enter the drawing module (Drafting), open the Tables folder in the Resource Bar (Resource Bar), find the MXB.prt file, drag MXB.prt to the window, and the standard part parameters will be automatically added to the list In the table, there is no need to re-enter the designer.