Hole flanging positioning device for laser cutting of hot-formed parts
The flip-flop positioning device that realizes a shaped positioning and flip-floping hole through a step-by-step method solves the problem of inaccurate positioning during laser cutting of thermoformed parts, improves mass production stability and material utilization, and reduces costs.
Patent Information
- Application Number
- CN202422475413.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-14
- Publication Date
- 2025-08-08
- Estimated Expiration
- 2034-10-14
AI Technical Summary
During laser cutting, thermal expansion and contraction affect the inaccurate positioning of thermoformed parts, resulting in poor mass production stability, high scrap rate, and low material utilization rate.
A flip-hole positioning device that realizes shaped positioning and flip-hole is used to position the flip-hole positioning pin and forming positioning pin to position it in different parts. Combined with analysis software, it simulates and optimizes the positioning hole and flip-flop height to ensure accurate positioning of laser cutting.
It improves mass production stability, reduces scrap rate, realizes efficient use of materials, and reduces laser cutting costs.
Smart Images
Figure CN223197827U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of molds, in particular to a hole-turning positioning device used for laser cutting of thermoforming parts. Background Art
[0002] With the development of the mold industry, the mold development cycle is getting shorter and shorter, and the mass production stability of thermoformed parts is becoming more and more important. Accurate positioning can ensure the consistency of mass-produced parts and reduce the debugging time of laser cutting. Thermoformed parts are often formed using a positioning method of one round hole and one waist hole. Laser cutting can also use this positioning method, but the product surface sometimes rebounds or is not fixed, which will cause unstable laser cutting. The positioning is often inaccurate due to the influence of thermal expansion and contraction. When positioning the surface or convex hull, the stability of mass production is relatively poor, and the scrap rate of mass production is high. There is an urgent need to solve the precision problem in production. Summary of the Invention
[0003] In order to overcome the deficiencies of the prior art, the utility model provides a hole-turning positioning device for laser cutting of thermoformed parts. The device adopts a commonly used round hole and waist hole of thermoformed parts as a basis for forming positioning, and flanging is performed when the forming is bottomed out, thereby ensuring the forming positioning and the one-time forming of the part surface, avoiding the problem of inaccurate positioning caused by the influence of thermal expansion and contraction. At the same time, because the hole-turning positioning and the forming positioning positions are at different positions above and below the positioning pin, the utilization rate of the material is not affected.
[0004] In order to achieve the above-mentioned purpose, a hole-turning positioning device for laser cutting of thermoformed parts is designed, comprising an upper die base and a lower die base, a lower die base is provided below the upper die base, a product sheet is provided above the lower die base, three external positioning tools are provided on both sides of the product sheet, a U-shaped groove is provided in the middle of the lower die base, a waist-shaped flanging convex bulge is provided above one end of the lower die base, a locating pin mounting hole two is provided in the waist-shaped flanging convex bulge, a forming locating pin is installed in the locating pin mounting hole two, a locating pin mounting hole one is further provided in the U-shaped groove, a hole-turning locating pin is installed in the locating pin mounting hole one.
[0005] The hole-turning positioning pin is a step pin, and the lower half of the hole-turning positioning pin is provided with a lower die hole-turning punch.
[0006] The formed positioning pin is a straight pin, and a square groove is provided on the formed positioning pin.
[0007] The lower die base is provided with a threaded hole matched with the square groove.
[0008] The upper die base is provided with a first product process hole and a second product process hole which match the first positioning pin installation hole and the second positioning pin installation hole.
[0009] The product sheet is formed into a waist-shaped profiling structure of the product through hole turning.
[0010] The first positioning pin installation hole on the lower die base is a plum blossom hole.
[0011] Compared with the existing technology, the utility model adopts a step-by-step method to achieve shape positioning and then hole punching, and the hole punching is used for laser cutting positioning. The mass production stability is stronger and the scrap rate is lower. It realizes shape-based shaping and sheet cutting-free, improves material utilization, and is suitable for all hot-formed parts. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 Schematic diagram of the fixation of the thermoforming mold.
[0013] Figure 2 Schematic diagram of product mold closing for thermoforming mold.
[0014] Figure 3 This is a diagram showing the positioning of the holes for forming the product.
[0015] Figure 4 This is a cross-sectional view of the length of the waist-round hole.
[0016] Figure 5 It is a cross-sectional view in the width direction of the waist-round hole.
[0017] Figure 6 This is a cross-sectional view of a circular hole.
[0018] Figure 7 This is a partial enlarged view of the flanging.
[0019] See also Figures 1 to 7 , 1 is an external locating tool, 2 is a product sheet, 3 is a hole-turning locating pin, 4 is a forming locating pin, 5 is a waist-round flanging convex bump, 6 is a waist-shaped profiling structure of the product, 7 is an upper die seat, 8 is a lower die seat, 9 is a threaded hole, 10 is a U-shaped groove, 11 is a square groove, 12 is a locating pin mounting hole one, 13 is a locating pin mounting hole two, 14 is a lower die hole-turning punch, 15 is a product process hole one, and 16 is a product process hole two. DETAILED DESCRIPTION
[0020] The present invention will be further described below with reference to the accompanying drawings.
[0021] like Figure 1As shown, a lower die base 8 is provided below the upper die base 7, and a product sheet 2 is provided above the lower die base 8. The product sheet 2 in the figure is a seat crossbeam. Three external positioning tools 1 are provided on both sides of the product sheet 2. The external positioning tools 1 play a fixing role. A U-shaped groove 10 is provided in the middle of the lower die base 8, and a waist-shaped flanging convex 5 is provided above one end of the lower die base 8. A positioning pin mounting hole 2 13 is provided in the waist-shaped flanging convex 5, and a forming positioning pin 4 is installed in the positioning pin mounting hole 2 13. The forming positioning pin 4 plays a role of forming positioning. A positioning pin mounting hole 12 is also provided in the U-shaped groove 10, and a flip-hole positioning pin 3 is installed in the positioning pin mounting hole 12.
[0022] The flipping positioning pin 3 is a step pin. The upper part of the flipping positioning pin 3 and the forming positioning pin 4 together play the role of forming positioning. The lower part of the flipping positioning pin 3 is provided with a lower die flipping punch 14. The lower die flipping punch 14 plays the role of flipping, and finally makes the product 3 flip out a flange of about 3 mm. The lower die flipping punch 14 plays a positioning role during the laser cutting process.
[0023] The formed positioning pin 4 is a straight pin, and a square groove 11 is provided on the formed positioning pin.
[0024] The lower die base 8 is provided with a threaded hole 9 that matches the square groove 11. The forming positioning pin 4 is a circular hole. The forming positioning pin 4 can be fixed to the lower die base 8 through the threaded hole 9 to play a forming positioning role.
[0025] The upper die base 7 is provided with a product process hole 15 and a product process hole 2 16 which cooperate with the positioning pin mounting hole 12 and the positioning pin mounting hole 2 13. The product process hole 2 16 is a necessary structure for process forming and can also be replaced by a discharge sheet.
[0026] The product sheet 2 is formed into a waist-shaped profiling structure 6 of the product through punching.
[0027] The positioning pin mounting hole 12 on the lower die base 8 is a plum blossom hole. The plum blossom hole design prevents the part from wrapping when the part is returned, thereby ensuring the stability of mass production.
[0028] The specific operation process of the present invention is as follows: the device of the present invention can be applied to all thermoformed products in combination with analysis software simulation. This paper takes the seat crossbeam as an example. First, the analysis software is used to simulate the forming. According to the simulation results, the positioning holes and the position of the flip hole positioning pins of the sheet are set, and the height of the flanging is adjusted and optimized to be uniform. The flip hole positioning pin 3 and the forming positioning pin 4 are respectively installed in the positioning pin mounting hole 12 and the positioning pin mounting hole 2 13 in the lower die base 7. The forming positioning pin 4 is fixed by inserting a screw into the threaded hole 9 and the square groove 11. The product 2 is installed according to the positioning pin positions at both ends. The upper die base 7 presses the material downward, as shown in FIG. Figure 7As shown, the product 2 is squeezed by the lower die punch 14 of the lower half of the hole locating pin 3, and a flange of about 3 mm is turned out. The waist-shaped profiling structure 6 of the product fits tightly with the hole locating pin 3, which is used for precise positioning of laser cutting. When returning the material, the plum blossom hole design of the hole locating pin 3 prevents the part from wrapping when returning the material, ensuring the stability of mass production. Under the premise of unified benchmarks, cutting-free stability can be achieved, thereby improving material utilization and reducing laser cutting costs, reducing the development cost of the entire hot-formed parts, and making the product more cost-effective in the market.
Claims
1. A hole-turning positioning device for laser cutting of thermoformed parts, comprising an upper die base and a lower die base, characterized in that: A lower die base (8) is provided below the upper die base (7), a product sheet (2) is provided above the lower die base (8), three external positioning tools (1) are provided on both sides of the product sheet (2), a U-shaped groove (10) is provided in the middle of the lower die base (8), a waist-shaped flanging convex bulge (5) is provided above one end of the lower die base (8), a second positioning pin mounting hole (13) is provided in the waist-shaped flanging convex bulge (5), a formed positioning pin (4) is installed in the second positioning pin mounting hole (13), a positioning pin mounting hole (12) is further provided in the U-shaped groove (10), and a flip-hole positioning pin (3) is installed in the first positioning pin mounting hole (12).
2. The hole-turning positioning device for laser cutting of thermoformed parts according to claim 1, characterized in that: The hole-turning positioning pin (3) is a step pin, and the lower half of the hole-turning positioning pin (3) is provided with a lower die hole-turning punch (14).
3. The hole-turning positioning device for laser cutting of thermoformed parts according to claim 1, characterized in that: The formed positioning pin (4) is a straight pin, and a square groove (11) is provided on the formed positioning pin (4).
4. A hole-turning positioning device for laser cutting of thermoformed parts according to claim 1 or 3, characterized in that: The lower die base (8) is provided with a threaded hole (9) that matches the square groove (11).
5. The hole-turning positioning device for laser cutting of thermoformed parts according to claim 1, characterized in that: The upper die base (7) is provided with a product process hole 1 (15) and a product process hole 2 (16) which cooperate with the positioning pin mounting hole 1 (12) and the positioning pin mounting hole 2 (13).
6. The hole-turning positioning device for laser cutting of thermoformed parts according to claim 1, characterized in that: The product sheet (2) is formed into a waist-shaped profiling structure (6) of the product through hole punching.
7. The hole-turning positioning device for laser cutting of thermoformed parts according to claim 1, characterized in that: The first positioning pin mounting hole (12) on the lower die base (8) is a plum blossom hole.