Mould insert positive angle milling automatic machining method based on on-machine measurement technology

Abstract

The invention discloses an automatic machining method for milling a positive angle of a mold insert based on an on-machine measurement technology, and aims to shorten the machining time and improve the machining precision and the machining efficiency of the positive angle machining of the mold insert. According to the technical scheme, the method comprises the steps that parameter configuration is conducted, specifically, a detection coordinate system, the workpiece size, tool parameters and machining parameters are set in a user-defined mode; the workpiece is straightened, the four edges of the mold insert are detected according to the two points of each edge through the on-machine measurement function, a numerical control system calculates and obtains the deviation and deflection angles (X, Y and C) of the actual size and the theoretical size of the workpiece, and real-time updating is conducted in G54.4; based on the updated position parameters, positioning machining after tool changing is carried out; an air blowing cutter handle cleaning program is executed, positioning cleaning of each edge is carried out, and it is guaranteed that each edge is cleaned in place; and performing three-point detection on each edge of the machined workpiece, calculating the parallelism and perpendicularity of a straight line, and after measurement is completed, displaying a result in a pop-up box and outputting the result.

Description

Technical Field

[0001] The invention belongs to the field of mold production, and in particular relates to an automatic processing method for milling positive angles of mold inserts based on on-machine measurement technology. Background Art

[0002] The positive angle of mold inserts refers to the parallelism and perpendicularity of the four outer edges of the upper and lower mold inserts in the plastic mold, and the perpendicularity of the four edges relative to the bottom surface of the mold inserts. The positive angle of the mold inserts as a benchmark will affect the accuracy of the subsequent entire mold processing. Therefore, for molds with high precision requirements, the accuracy of the positive angle of the mold inserts must be guaranteed first. The positive angle processing of traditional mold inserts is completed by grinding machines.

[0003] The existing method of processing the positive angle of mold inserts by grinding machines is mainly to stand up the workpiece that has completed surface grinding and grind the four straight edges separately. The main problems with the existing method of processing the positive angle of mold inserts are that the grinding machine processing requires high operator control of the accuracy within 0.005mm, the manual table alignment method is difficult to implement, the grinding machine processing removes little, the processing time is long, and the processing efficiency is low. Summary of the invention

[0004] The purpose of the present invention is to address the problems in the above-mentioned prior art and to provide an automated method for milling positive angles of mold inserts based on on-machine measurement technology. The method can use on-machine measurement technology to quickly align the mold inserts and complete the processing of the four positive angles of the mold insert in one clamping by milling.

[0005] In order to achieve the above object, the technical solution adopted by the present invention comprises the following steps: Step 1: Parameter configuration: customize the detection coordinate system, workpiece size, tool parameters and processing parameters; Step 2: Align the workpiece. Use the on-machine measurement function to detect two points on each side of the four sides of the mold insert. The CNC system calculates the deviation and deflection angle (△X, △Y, △C) between the actual size and theoretical size of the workpiece, and updates it in real time in G54.4. Step 3: Based on the updated position parameters, positioning processing is performed after tool change; Step 4: Perform the air blowing knife handle cleaning procedure to position and clean each edge to ensure that each edge is cleaned properly; Step 5: Perform three-point detection on each edge of the processed workpiece to calculate the parallelism and verticality of its straight lines. After the measurement is completed, a pop-up window will display the results and output them.

[0006] Furthermore, in step 1, the upper limit of the input content is limited according to the actual meaning of each parameter to perform foolproof protection.

[0007] Furthermore, when detecting two points on each side in step 2, the positions of the measuring points can be adjusted according to the size change of the mold insert.

[0008] Furthermore, in step 2, when the unilateral deviation of the detection result is greater than 0.5 mm or the measured size is smaller than the set size, an alarm will be prompted.

[0009] Furthermore, the positioning processing in step 3 can be divided into rough processing and fine processing according to the on-site processing technology, and the rough processing allowance can be input in the parameter setting, and the subsequent rough processing can be automatically processed according to the parameter setting content. In the above step 3, the number of lateral layers can be customized according to the insert processing requirements, and it can be directly set in the parameter configuration to achieve the corresponding number of lateral layers and lateral layer spacing.

[0010] Furthermore, in step 4, the cleaning height of the air blowing tool holder can be customized in the parameter configuration according to the processing requirements.

[0011] Furthermore, in step five, the center position of the height of each edge of the processed workpiece is selected for three-point detection.

[0012] Compared with the prior art, the present invention has the following beneficial effects: the mold insert can be quickly aligned by on-machine measurement technology, the alignment accuracy can reach within 0.005mm, and the milling of four positive angles can be completed in one clamping. No manual intervention is required during the entire processing process, and the program automatically executes alignment, processing, cleaning and measurement. The present invention shortens the processing time and improves the processing accuracy and processing efficiency of the positive angle processing of the mold insert. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 Application flow chart of the automatic processing method for positive angle milling of mold inserts based on on-machine measurement technology of the present invention; Figure 2 Program structure tree; Figure 3 Parameter configuration interface; Figure 4 The print result is displayed. DETAILED DESCRIPTION

[0014] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0015] See also Figure 1 , Figure 2 The present invention provides a method for automatically processing mold inserts by milling positive angles based on on-machine measurement technology, comprising the following steps: Step S1, parameter configuration, such as Figure 3As shown, in the CNC system parameter configuration interface, the detection coordinate system, workpiece size, tool parameters and processing parameters are customized according to the actual processing information on site; Step S2, the workpiece is aligned. The four sides of the mold insert are detected by two points on each side using the on-machine measurement function. The CNC system calculates the deviation and deflection angle (△X, △Y, △C) between the actual size and theoretical size of the workpiece and updates them in real time in G54.4. Step S3, disc cutter positioning processing, based on the updated position parameters, positioning processing of the four sides of the right angle after the tool change; Step S4, workpiece cleaning, executing the air blowing tool handle cleaning procedure, performing positioning cleaning of each edge to ensure that each edge is cleaned in place; Step S5, parallelism and verticality are detected on the machine, such as Figure 4 As shown, three-point detection is performed on each edge of the processed workpiece to calculate the parallelism and verticality of its straight lines. After the measurement is completed, a pop-up box displays the result and outputs it.

Claims

1. A method for automatically processing mold inserts by milling positive angles based on on-machine measurement technology, characterized in that: The following steps are involved: Step 1: Parameter configuration: customize the detection coordinate system, workpiece size, tool parameters and processing parameters; Step 2: Align the workpiece. Use the on-machine measurement function to detect two points on each side of the four sides of the mold insert. The CNC system calculates the deviation and deflection angle (△X, △Y, △C) between the actual size and theoretical size of the workpiece, and updates it in real time in G54.

4. Step 3: Based on the updated position parameters, positioning processing is performed after tool change; Step 4: Perform the air blowing knife handle cleaning procedure to position and clean each edge to ensure that each edge is cleaned properly; Step 5: Perform three-point detection on each edge of the processed workpiece to calculate the parallelism and verticality of its straight lines. After the measurement is completed, a pop-up window will display the results and output them.

2. According to claim 1, the method for automatically processing mold inserts by milling positive angles based on on-machine measurement technology is characterized in that: In the step 1, the upper limit of the input content is limited according to the actual meaning of each parameter to perform foolproof protection.

3. The method for automatically processing mold inserts by milling positive angles based on on-machine measurement technology according to claim 1, characterized in that: When the detection is performed at two points on each side in step 2, the positions of the measuring points can be adjusted according to the size change of the mold insert.

4. The method for automatically processing mold inserts by milling positive angles based on on-machine measurement technology according to claim 1, characterized in that: When the unilateral deviation of the detection result in the step 2 is greater than 0.5 mm or the measured size is smaller than the set size, an alarm will be prompted.

5. The method for automatically processing mold inserts by milling positive angles based on on-machine measurement technology according to claim 1, characterized in that: The positioning processing in the step three can be divided into rough processing and fine processing according to the on-site processing technology, and the rough processing allowance can be input in the parameter setting, and the subsequent rough processing can be automatically processed according to the parameter setting content.

6. The method for automatically processing mold inserts by milling positive angles based on on-machine measurement technology according to claim 1, characterized in that: In the above-mentioned step three, the number of lateral layering can be customized according to the insert processing requirements, and can be directly set in the parameter configuration to achieve the corresponding number of lateral layering and lateral layering spacing.

7. The method for automatically processing mold inserts by milling positive angles based on on-machine measurement technology according to claim 1, characterized in that: In the above-mentioned step 4, the cleaning height of the air blowing tool holder can be customized in the parameter configuration according to the processing requirements.

8. The method for automatically processing mold inserts by milling positive angles based on on-machine measurement technology according to claim 1, characterized in that: In the step 5, the center position of the height of each edge of the processed workpiece is selected for three-point detection.

Images