A method for manufacturing a die positioning spacer

Abstract

The present application belongs to the technical field of sheet metal tooling manufacturing technology in aviation manufacturing technology, and relates to a manufacturing method of a positioning block of a testing die. The positioning block is manufactured through machining, and is processed on the basis of the original testing die, so that the precise positioning of the profile size of the profile part is realized, the problem of inaccurate profile size of the profile part caused by the influence of the thermal expansion coefficient of the testing die is solved, and a simple, fast and accurate profile part trimming mode and acceptance method are provided. The present application has the following characteristics: a positioning block mounting surface is first machined at the position of the line end of the testing die part, then a positioning hole of the block is made on the mounting surface and a bushing is pressed into the hole; meanwhile, the positioning block is arranged during the machining process, and after the arrangement is completed, numerical control machining is performed, and the machined positioning block is assembled with the testing die through a conical pin. Through the configuration of the end positioning block, the precise positioning of the profile size of the profile part is realized, and the problem of inaccurate profile size of the profile part caused by the influence of the thermal expansion coefficient of the testing die is solved.

Description

Technical Field

[0001] This invention belongs to the field of sheet metal tooling manufacturing technology in aerospace manufacturing technology, and relates to a manufacturing method for a positioning block for an inspection mold. Background Technology

[0002] This invention belongs to the field of resin mold manufacturing. By configuring the positioning block at the end of the inspection mold, it meets the dimensional requirements of aircraft profile parts, solves the problem of unstable dimensional properties of profile parts caused by the influence of the thermal expansion coefficient of the inspection mold, and achieves precise positioning of profile parts on the inspection mold, thus meeting the user's requirements for acceptance and delivery of profile parts based on their dimensional properties.

[0003] The current inspection mold usage process is as follows: First, standard profile parts are positioned using the part lines on the inspection mold surface. Then, the profile parts are trimmed using the part lines on the web surface of the backing block. The user accepts and delivers the parts based on the fit between the profile parts and the web surface of the backing block.

[0004] This invention achieves precise control of the external dimensions of profile parts through end positioning blocks.

[0005] The difference between this invention patent and the conventional inspection module block configuration is as follows:

[0006] 1. This invention achieves precise control of the external dimensions of profile parts by configuring the positioning blocks.

[0007] 2. This invention simplifies the trimming and acceptance process of profile parts. The profile parts are trimmed directly according to the positioning blocks and part lines, and the inspection personnel accept the external dimensions according to the position of the positioning blocks.

[0008] 3. The positioning block in this invention needs to be made into a movable block; the block and the inspection model surface need to fit accurately; the block needs to be connected to the angle steel on the inspection model by a steel wire rope to prevent loss. Summary of the Invention

[0009] This invention achieves precise positioning of profile parts' dimensions by manufacturing positioning blocks and supplementing the existing inspection mold. This solves the problem of inaccurate dimensional changes in profile parts caused by the thermal expansion coefficient of the inspection mold, providing a simple, fast, and accurate method for trimming and accepting profile parts. The invention is characterized by first machining a mounting surface for the positioning blocks at the end of the inspection mold part, then creating positioning holes on the mounting surface and pressing in bushings; simultaneously, the positioning blocks are arranged during the machining process, CNC-machined after arrangement, and finally assembled with the inspection mold using tapered pins.

[0010] Technical solution

[0011] A method for manufacturing a test mold positioning block includes:

[0012] Step 1) Perform CNC machining on the original inspection mold. The machining requires the inspection mold to be aligned twice on a CNC machine tool. After the alignment is completed, the mounting surface and mounting positioning hole of the block are made at the end position of the profile part according to the digital model, and the fixing bushing is pressed into the positioning hole.

[0013] Step 2) Arrange the blocks on the digital model according to the material requirements of the end positioning blocks. After arranging the blocks, determine the programming and processing scheme based on the outer dimensions of the blocks and the position of the positioning holes.

[0014] Step 3) After the positioning block is processed, assemble the positioning block and the finished inspection mold through the mounting positioning hole using cylindrical pins.

[0015] Furthermore, in step 1), the secondary search method is as follows: on the CNC machine tool, the coordinate origin is set on the inspection reference hole of the inspection mold, the coordinate values ​​of the other inspection reference holes in this coordinate system are measured, and a corresponding machining coordinate system is established on the digital model based on the coordinate values.

[0016] Furthermore, in step 2), the method for pressing in the fixed bushing is as follows: first, make the mounting and positioning holes on the mounting surface of the block according to the program normal, and then press in the fixed bushing according to the hole position program. The bushing and the positioning hole adopt an interference fit.

[0017] The specific diameter of the positioning hole is Φ12H7, and the specific specification of the fixing bushing is A8H7×8HB399-87.

[0018] Furthermore, in step 2), material layout is required when machining the positioning block. The layout method is based on the existing sheet metal dimensions combined with the external dimensions of the positioning block. During layout, a cutting kerf is reserved according to the diameter of the CNC tool used.

[0019] The sheet material is specifically Sikablock M945;

[0020] The cutting kerf is designed with a 5mm margin on each side, based on the tool size.

[0021] Furthermore, in step 2), when performing CNC programming on the positioning block after the material is laid out, the flipping processing method is selected according to the block structure. First, one side of the positioning block is processed. After processing, it is flipped over, the processing coordinate system is reset, and then the other side is processed.

[0022] Furthermore, in the previous step, during the flipping process, the origin of the coordinate system remains unchanged, and the flipping is performed by rotating along the coordinate axes.

[0023] Technical effect

[0024] Compared with conventional inspection mold usage methods, the advantages of this invention are:

[0025] 1. By configuring end positioning blocks, the precise positioning of the profile parts' external dimensions is achieved, solving the problem of inaccurate external dimensions of profile parts due to the influence of the thermal expansion coefficient of the inspection mold.

[0026] 2. By configuring end positioning blocks, the problem of inaccurate positioning of the sunken position during the profile part shaping process was solved.

[0027] 3. A method for positioning and calibrating profile parts in batches is provided.

[0028] 4. It provides a simple, quick, and accurate method for trimming and inspecting profile parts, simplifying the user's process for using and inspecting profile parts.

[0029] 5. A method for part positioning is provided, which can be extended to the manufacturing of fixtures, frame-related tooling. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the original inspection mold, which also shows the positional relationship between the original inspection mold's support block and the mold body.

[0031] Figure 2 This is the mounting and positioning surface for the fixed support block of the present invention.

[0032] Figure 3 The diagram illustrates the material arrangement method when the material is positioned relative to the processing block.

[0033] Figure 4 This is a diagram showing the positional relationship between the positioning block and the mold body for testing purposes in this invention.

[0034] Among them: 1-Inspection mold support block, 2-Inspection mold, 3-Mounting positioning surface, 4-Fixing bushing, 5-Positioning support block, 6-Sikablock M945 sheet metal. Detailed Implementation

[0035] The manufacturing method of the inspection mold positioning block includes:

[0036] Step 1) Perform CNC machining on the original inspection mold. The machining requires the inspection mold to be aligned twice on a CNC machine tool. After the alignment is completed, the mounting surface and mounting positioning hole of the block are made at the end position of the profile part according to the digital model, and the fixing bushing is pressed into the positioning hole.

[0037] Step 2) Arrange the blocks on the digital model according to the material requirements of the end positioning blocks. After arranging the blocks, determine the programming and processing scheme based on the outer dimensions of the blocks and the position of the positioning holes.

[0038] Step 3) After the positioning block is machined, assemble the positioning block and the finished inspection mold using cylindrical pins through the mounting positioning holes. The secondary search method in Step 1) involves setting the coordinate origin on the inspection mold's reference hole on the CNC machine tool, measuring the coordinate values ​​of the remaining reference holes in this coordinate system, and establishing a corresponding machining coordinate system on the digital model based on these coordinate values. The method for pressing in the fixed bushing in Step 2) involves first machining the mounting positioning hole on the mounting surface of the positioning block according to the program normal, and then pressing in the fixed bushing according to the hole position program. The bushing and the positioning hole use an interference fit. The specific diameter of the positioning hole is Φ12H7, and the specific specification of the fixed bushing is A8H7×8HB399-87. When machining the positioning block in Step 2), material layout is required. The material layout method is based on the existing sheet metal dimensions combined with the external dimensions of the positioning block. During material layout, a tool cutter kerf is reserved according to the diameter of the CNC tool used. The sheet material is specifically a Sikablock M945; the cutting kerf is pre-set with a 5mm allowance on each side based on the tool size. In step 2), when CNC programming the positioning block after the material layout is completed, the flipping processing method is selected according to the block structure. First, one side of the positioning block is processed. After processing, it is flipped over, the processing coordinate system is reset, and then the other side is processed. In the previous step, the origin of the coordinate system remains unchanged during the flipping process, and the flipping is performed by rotating along the coordinate axis.

[0039] The present invention will now be described in further detail.

[0040] First, let me introduce how to use the original inspection model: (e.g.) Figure 1 This illustrates the relative positional relationship between "Inspection Mold Block 1" and "Inspection Mold 2". The profile parts are placed according to the part line position of "Inspection Mold 2", with the web surface attached to "Inspection Mold Block 1".

[0041] The specific implementation of this invention is as follows:

[0042] 1. For example Figure 2 First, the "inspection mold 2" is aligned twice on the CNC machine tool. After the alignment is completed, CNC machining is performed. The machining area is the "installation positioning surface 3" and the "fixed bushing 4" is pressed into the positioning hole.

[0043] 2. For example Figure 3 The material is laid out on “Sikablock M945 sheet 6”. After the material is laid out, “positioning block 5” is CNC machined according to the CNC program.

[0044] 3. For example Figure 4 Install the "positioning block 5" onto the "installation positioning surface 3" of the "inspection mold 3" using a cylindrical pin through the installation positioning hole.

[0045] 4. Place the profile part in the corresponding position of the inspection mold, locate the profile part according to the "positioning block 5" to determine the external dimensions of the profile part, and cut the profile part according to the cut edge shape.

[0046] The following is a brief overview of the present invention with reference to a specific model.

[0047] 1. Align a certain inspection mold a second time on a CNC machine tool, perform additional machining on the inspection mold according to the program, make the mounting surface of the support block and the mounting positioning hole, and press the fixing bushing into the positioning hole.

[0048] 2. Since the end positioning block is made of Sikablock M945 sheet metal with fixed dimensions, the end positioning block needs to be laid out on the digital model, leaving space for the cutting tool during the laying process.

[0049] 3. During the processing, based on the dimensions of the block and the positioning hole, the outer shape and positioning through hole need to be machined on one side first. After machining, the side needs to be flipped over to machine the stepped hole and the outer shape needs to be cut off.

[0050] 4. Assemble the completed inspection mold and the machining end positioning block using pins.

Claims

1. A method for manufacturing a positioning block for an inspection mold, characterized in that, include: Step 1) Perform CNC machining on the original inspection mold. The machining requires the inspection mold to be aligned twice on a CNC machine tool. After the alignment is completed, make the mounting surface of the block and the mounting positioning hole according to the position of the profile part line end of the digital model, and press the fixing bushing into the positioning hole. Step 2) Arrange the blocks on the digital model according to the material requirements of the end positioning blocks. After arranging the blocks, determine the programming and processing scheme according to the outer dimensions of the blocks and the position of the positioning holes. Step 3) After the positioning block is processed, assemble the positioning block and the finished inspection mold through the mounting positioning hole using cylindrical pins.

2. The manufacturing method of the inspection mold positioning block according to claim 1, characterized in that, The secondary alignment method in step 1) is as follows: On the CNC machine tool, the coordinate origin is set on the inspection reference hole of the inspection mold, the coordinate values ​​of the other inspection reference holes in this coordinate system are measured, and the corresponding machining coordinate system is established on the digital model according to the coordinate values.

3. The manufacturing method of an inspection mold positioning block according to claim 1, characterized in that, The method for pressing in the fixed bushing in step 2) is as follows: First, make the mounting positioning hole on the mounting surface of the block according to the program normal, and then press in the fixed bushing according to the hole position program. The bushing and the positioning hole adopt an interference fit.

4. The manufacturing method of an inspection mold positioning block according to claim 1, characterized in that, The specific diameter of the positioning hole is Φ12H7, and the specific specification of the fixing bushing is A8H7×8HB399-87.

5. The manufacturing method of an inspection mold positioning block according to claim 1, characterized in that, In step 2), when processing the positioning block, it is necessary to arrange the material. The arrangement method is based on the existing sheet size and the outer dimensions of the positioning block. When arranging the material, the cutting kerf should be reserved according to the diameter of the CNC tool used.

6. The manufacturing method of an inspection mold positioning block according to claim 5, characterized in that, The sheet material is specifically Sikablock M945.

7. A method for manufacturing an inspection mold positioning block according to claim 5, characterized in that, The cutting kerf is designed with a 5mm margin on each side, based on the tool size.

8. A method for manufacturing an inspection mold positioning block according to claim 1, characterized in that, In step 2), when performing CNC programming on the positioning block after the material is laid out, the flipping processing method is selected according to the block structure. First, one side of the positioning block is processed. After processing, it is flipped over, the processing coordinate system is reset, and then the other side is processed.

9. A method for manufacturing an inspection mold positioning block according to claim 1, characterized in that, In the previous step, the origin of the coordinate system remained unchanged during the flipping process, and the flipping was rotated along the coordinate axis.

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