Process method for improving utilization rate of hot forming material through butt welding

Abstract

The invention relates to the technical field of dies, in particular to a process method for improving the utilization rate of hot forming materials through butt welding. The process method comprises the steps that a welding tool is prepared, a welding positioning hole and a forming positioning hole are formed in a left piece material piece and a right piece material piece in a penetrating mode respectively, a welding positioning pin and a forming positioning pin are prepared on the welding tool, the left piece material piece and the right piece material piece are placed, the left piece material piece and the right piece material piece are fixed, and an inductor checks the positions of the left piece material piece and the right piece material piece. Compared with the prior art, the left piece material sheet and the right piece material sheet are welded into the whole material sheet, so that the material plates are attached more tightly, the material utilization rate is improved, the blanking and layout roll width step is reduced, the die size is also reduced, the cost is reduced, the material utilization rate is guaranteed, and it is guaranteed that the number of times of punching is not increased. Cutting-free can be guaranteed, the procedure of manual polishing is omitted after welding, the cost is low, and mass production can be smoothly promoted.

Description

Technical Field

[0001] The invention relates to the field of mold technology, in particular to a process method for improving the utilization rate of hot forming materials by butt welding. Background Art

[0002] With the continuous development of the mold industry, the mold development cycle is getting shorter and shorter, especially after the trend of localization of hot forming molds, many parts have changed from cold stamping parts to hot forming parts. When it is finally necessary to strengthen the body strength to achieve lightweight, hot forming often has high requirements and is generally completed in one step. In addition, hot forming molds are affected by the alternation of hot and cold, the tools are easily worn, and the stability of mass production is poor. Therefore, it is necessary to explore methods to improve material utilization and reduce costs. Summary of the invention

[0003] In order to overcome the shortcomings of the prior art, the present invention provides a process method for improving the utilization rate of hot forming materials by butt welding. When using forming software to simulate the formability, it is found that according to the shape of the sheet with one end larger than the other, after welding a single sheet, the two integrated sheets can be blanked separately after butt welding. This makes the sheet fit more closely, which is conducive to improving the material utilization rate, and the step width of the blanking pattern roll becomes smaller, the mold size also becomes smaller, which is more conducive to reducing costs and improving the processing utilization rate of the product.

[0004] In order to achieve the above-mentioned purpose, a process method for improving the utilization rate of hot-formed materials by butt welding is designed, comprising the following steps: S1: Prepare a welding tool according to the welding diagram. S2: Set welding positioning holes and forming positioning holes on the left piece and the right piece, respectively. S3: Prepare welding positioning pins and forming positioning pins on the welding tool according to the positions of the welding positioning holes and the forming positioning holes of the two pieces. S4: Match the positioning pins on the welding tool with the welding positioning holes and the forming positioning holes on the pieces one by one, and overlap the left piece and the right piece on the welding tool. S5: Fix the left piece and the right piece by fixing the clamp. S6: Divide the middle position of the left piece and the right piece into an overlapping area, and make a projection welding spot diagram in the overlapping area. S7: Check whether the positions of the left piece and the right piece are placed correctly, and determine whether the pieces are placed in the correct position by detecting and transmitting signals through sensors. S8: Select the overlapping area of ​​the left sheet and the right sheet as the sheet welding area, and weld the left sheet and the right sheet into a whole sheet according to the three projection welding points of projection welding.

[0005] The forming positioning holes described in S2 include forming positioning holes in the shape of plum blossoms and forming positioning holes in the shape of oval holes. The forming positioning holes in the shape of plum blossoms are provided on the left piece of material, and the forming positioning holes in the shape of oval holes are provided on the right piece of material.

[0006] The hole-turning positioning pin of the formed positioning hole waist round hole described in S2 will turn up the edge of the lower surface of the right piece material by 3mm during the hole-turning process.

[0007] The welding positioning holes described in S3 are respectively provided with two on the left piece and the right piece, so there are four corresponding welding positioning pins in total.

[0008] The formed positioning pins described in S3 include anti-mistake positioning pins and punched hole positioning pins. The corresponding anti-mistake positioning pins are prepared at the waist-round holes of the formed positioning holes of the left piece, and the corresponding punched hole positioning pins are prepared at the plum blossom holes of the formed positioning holes of the right piece.

[0009] When placing the left piece and the right piece as described in S4, one end of the left piece needs to be placed below one end of the right piece.

[0010] The overlapping dimension of the left piece and the right piece described in S4 is 14 mm.

[0011] The sensor described in S7 may be a contact sensor.

[0012] The welding tooling described in S1 includes a base, a support plate, a support base, and a fixed splint. A support plate is provided above the base, and a support base is provided above the support plate. The support base lifts up the left piece and the right piece. A fixed splint cooperating with the support base is provided above the left piece and the right piece.

[0013] A wheel hub is arranged below the base.

[0014] There are five supporting bases in total, and the supporting base structure is in an I-shape.

[0015] There are three fixed splints in total, the fixed splint structures on both sides are I-shaped, and the fixed splint structure in the middle is F-shaped.

[0016] Compared with the prior art, the present invention makes the material plates fit more closely, which is beneficial to improving the utilization rate of materials, and the width step of the blanking pattern roll becomes smaller, and the mold size also becomes smaller, which is more conducive to reducing costs. It not only ensures the utilization rate of materials, but also ensures that the number of punching times is not increased, and can ensure that cutting is avoided. Moreover, the manual grinding process is omitted after welding, which has low costs and can smoothly promote mass production. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Schematic diagram of left and right sheets.

[0018] Figure 2 Schematic diagram of sheet metal butt welding.

[0019] Figure 3 This is a side view of the sheet welding axis.

[0020] Figure 4 This is a top view of the blank welding.

[0021] Figure 5 This is a cross-sectional view of the welding of the blank.

[0022] Figure 6 This is the arrangement of raw material sheets.

[0023] Figure 7 To integrate the arrangement of the sheets.

[0024] See also Figures 1 to 5 , 1.1 is the left piece of material, 1.2 is the right piece of material, 2 is the whole piece of material, 3 is the fixed splint, 4 is the sensor, 5 is the anti-mistake positioning pin, 5.1 is the flip hole positioning pin, 6 is the welding positioning hole, 6.1 is the welding positioning pin, 7 is the formed positioning hole plum blossom hole, 8 is the welding area of ​​the piece of material, 9 is the schematic diagram of the convex welding point, 10 is the formed positioning hole waist round hole, 11 is the support plate, 12 is the welding positioning hole, 13 is the wheel hub, 14 is the base, 15 is the support base, and 16 is the overlapping area. DETAILED DESCRIPTION

[0025] The present invention will be further described below with reference to the accompanying drawings.

[0026] like Figures 1 to 5As shown, a process method for improving the utilization rate of hot-formed materials by butt welding includes the following steps: Step 1: Prepare a welding tool according to the welding diagram. Step 2: Set welding positioning holes 6 and forming positioning holes on the left piece sheet 1.1 and the right piece sheet 1.2 respectively. Step 3: Prepare welding positioning pins 6.1 and forming positioning pins on the welding tool according to the positions of the welding positioning holes 6 and the forming positioning holes of the two sheets. Step 4: Match the positioning pins on the welding tool with the welding positioning holes and the forming positioning holes on the sheet one by one, and overlap the left piece sheet 1.1 and the right piece sheet 1.2 on the welding tool. Step 5: Fix the left piece sheet 1.1 and the right piece sheet 1.2 by fixing the clamp 3. Step 6: Divide the middle position of the left piece sheet 1.1 and the right piece sheet 1.2 into an overlapping area 16, and make a projection welding spot diagram 9 in the overlapping area. Step 7: Check whether the positions of the left piece 1.1 and the right piece 1.2 are placed correctly, and the sensor 4 detects and transmits signals to determine whether the pieces are placed in the correct position. Step 8: Select the position of the overlapping area 16 of the left piece 1.1 and the right piece 1.2 as the piece welding area 8, and weld the left piece 1.1 and the right piece 1.2 into a piece as a whole 2 according to the three projection welding points of projection welding 9. Reduce the deformation of arc welding and reduce welding costs and welding efficiency. Due to the forming positioning holes 7 and the forming positioning holes 10 on the left and right separate pieces, after the left and right pieces are welded, the forming positioning holes 7 and the forming positioning holes 10 keep the positioning accuracy of the left and right separate pieces unchanged during the welding process, smoothly ensuring the stability of forming and laser cutting, and even the accuracy of edge line cutting can be guaranteed.

[0027] The forming positioning holes described in step 2 include a forming positioning hole plum blossom hole 7 and a forming positioning oval hole 10. The forming positioning hole plum blossom hole 7 is penetrated on the left piece material sheet 1.1, and the forming positioning hole oval hole 10 is penetrated on the right piece material sheet 1.2.

[0028] The hole-turning positioning pin 5.1 of the forming positioning hole waist round hole 10 described in step 2 will turn up the edge of the lower surface of the right piece of material by 3mm during the hole-turning process.

[0029] The welding positioning holes 6 described in step 3 are respectively provided with two on the left material piece 1.1 and the right material piece 1.2, so there are four corresponding welding positioning pins 6.1 in total.

[0030] The formed positioning pins described in step 3 include anti-mistake positioning pins 5 and punched hole positioning pins 5.1. The corresponding anti-mistake positioning pins 5 are prepared at the formed positioning hole waist hole 10 of the left piece 1.1, and the corresponding punched hole positioning pins 5.1 are prepared at the formed positioning hole plum blossom hole 7 of the right piece 1.2.

[0031] When placing the left piece 1.1 and the right piece 1.2 in step 4, one end of the left piece 1.1 needs to be placed below one end of the right piece 1.2.

[0032] The overlapping size of the left piece 1.1 and the right piece 1.2 described in step 4 is 14 mm. The mold should be considered to have a double layer of material thickness to ensure normal mold clearance.

[0033] The sensor 4 described in step 7 may be a contact sensor, and the sensor 4 transmits a signal to determine whether the device is placed in the correct position.

[0034] The welding tooling described in step 1 includes a base 14, a support plate 11, a support base 15, and a fixed clamp 3. The support plate 11 is provided above the base 14, and the support base 15 is provided above the support plate 11. The support base 15 holds up the left piece 1.1 and the right piece 1.2. A fixed clamp 3 cooperating with the support base 15 is provided above the left piece 1.1 and the right piece 1.2.

[0035] A hub 13 is disposed below the base 14 .

[0036] There are five support bases 15 in total, and the support base 15 structure is in an I-shape. Four support bases 15 respectively lift the left piece material 1.1 and the right piece material 1.2 from the left and right sides, and one support base 15 lifts the left piece material 1.1 and the right piece material 1.2 below the overlapping part of the left piece material 1.1 and the right piece material 1.2.

[0037] The fixing splints 3 are provided with three pieces in total. The fixing splints 3 on both sides are I-shaped. The I-shaped fixing splints ensure the balance of force and play a role in downward pressure balance. The middle fixing splint 3 is F-shaped. The F-shaped fixing splint 3 ensures that the projection welding point diagram 9 is displayed to facilitate welding.

[0038] The specific implementation method of the present invention is as follows: Figure 3 As shown, make the welding fixture according to the welding diagram, place the left and right pieces on the welding fixture, and weld the corresponding positioning pins on the welding fixture according to the position of the welding positioning holes of the pieces to ensure that the pieces cannot shake when they are fixed on the top. Figure 4As shown, the separate left piece 1.1 and right piece 1.2 are placed on the support plate of the tooling 11 in sequence, with the left piece 1.1 at the bottom and the right piece 1.2 at the top. The positions are determined by the positioning pins. The sensors detect whether the positions of the left piece 1.1 and the right piece 1.2 are correct. The fixed splint 3 is used to further reinforce them. The overlapping area 16 is divided in the middle. The F-shaped fixed splint 3 is pressed on the top. The mold should be considered to have a double-layer material thickness avoidance to ensure the normal gap of the mold. Three convex welding points 9 are marked at the gap of the F-shaped fixed splint 3 as indicated by automatic welding. The overlapping parts of the left piece 1.1 and the right piece 1.2 are welded. The left piece 1.1 and the right piece 1.2 are welded together by welding. Figure 1 The state changes to Figure 2 state, reducing arc welding deformation and reducing welding costs and welding efficiency. Since the left and right separate pieces each have two holes for positioning, after the left and right pieces are butt-jointed and welded, the original one round and one waist positioning on the left and right pieces, the plum blossom hole 7 and the waist round hole 10 of the forming positioning hole, the positioning accuracy remains unchanged during the welding process, smoothly ensuring the stability of forming and laser cutting, and the edge line cutting accuracy can also be guaranteed. Taking the A-pillar lower inner panel part as an example, Figure 6 to Figure 7 As shown in the figure, the layout of the blanks has changed. It can be seen that the gap between the blanks after welding is tighter, the width step of the blanking layout is smaller, the cost of the entire stamping material is greatly reduced, and it has very considerable economic value. The material utilization rate increases from 65% to 75%. This method can also be applied to all hot-formed products with splicing.

Claims

1. A process method for improving the utilization rate of hot forming materials by butt welding, comprising the following steps: S1: Prepare a welding tool according to the welding diagram. S2: Drill welding positioning holes (6) and forming positioning holes on the left piece (1.1) and the right piece (1.2), respectively. S3: Prepare welding positioning pins (6.1) and forming positioning pins on the welding tool according to the positions of the welding positioning holes (6) and the forming positioning holes of the two pieces. S4: Match the positioning pins on the welding tool with the welding positioning holes and the forming positioning holes on the pieces one by one, and overlap the left piece (1.1) and the right piece (1.2) on the welding tool. S5: Fix the left piece (1.1) and the right piece (1.2) by fixing the clamp (3). S6: Divide the middle position of the left piece (1.1) and the right piece (1.2) into an overlapping area (16), and make a projection welding spot diagram (9) in the overlapping area (16). S7: Check whether the positions of the left material sheet (1.1) and the right material sheet (1.2) are correctly placed, and determine whether the material sheets are placed in the correct position by detecting and transmitting signals through the sensor (4). S8: Select the position of the overlapping area (16) of the left material sheet (1.1) and the right material sheet (1.2) as the material sheet welding area (8), and weld the left material sheet (1.1) and the right material sheet (1.2) into a material sheet as a whole (2) according to the three projection welding points of projection welding (9).

2. A process for improving the utilization rate of hot forming materials by butt welding according to claim 1, characterized in that: The forming positioning holes described in S2 include a forming positioning hole plum blossom hole (7) and a forming positioning hole waist round hole (10), wherein the forming positioning hole plum blossom hole (7) is penetrated on the left piece material sheet (1.1), and the forming positioning hole waist round hole (10) is penetrated on the right piece material sheet (1.2).

3. The process for improving the utilization rate of hot forming materials by butt welding according to claim 1, characterized in that: The hole-turning positioning pin (5.1) for forming the positioning hole waist round hole (10) described in S2 will turn up the edge of the lower surface of the right piece sheet by 3 mm during the hole-turning process.

4. The process for improving the utilization rate of hot forming materials by butt welding according to claim 1, characterized in that: The welding positioning holes (6) described in S3 are respectively provided with two on the left piece material sheet (1.1) and the right piece material sheet (1.2), so there are four corresponding welding positioning pins (6.1) in total.

5. A process method for improving the utilization rate of hot-formed materials by butt welding according to claim 1, characterized in that: the forming positioning pins described in S3 include anti-mistake positioning pins (5) and punching positioning pins (5.1), and the corresponding anti-mistake positioning pins (5) are prepared at the waist round hole (10) of the forming positioning hole of the left piece (1.1), and the corresponding punching positioning pins (7) are prepared at the plum blossom hole (7) of the forming positioning hole of the right piece (1.2). 5.1） The process for improving the utilization rate of hot-formed materials by butt welding according to claim 1 is characterized in that: When placing the left material piece (1.1) and the right material piece (1.2) as described in S4, one end of the left material piece (1.1) needs to be placed below one end of the right material piece (1.2).

6. The process for improving the utilization rate of hot forming materials by butt welding according to claim 1, characterized in that: The overlapping dimension of the left piece (1.1) and the right piece (1.2) described in S4 is 14 mm.

7. The process for improving the utilization rate of hot forming materials by butt welding according to claim 1, characterized in that: The sensor (4) described in S7 may be a contact sensor.

8. The process for improving the utilization rate of hot forming materials by butt welding according to claim 1, characterized in that: The welding tool described in S1 comprises a base (14), a support plate (11), a support base (15), and a fixed clamp (3), wherein the support plate (11) is provided above the base (14), the support base (15) is provided above the support plate (11), the support base (15) holds up the left piece material (1.1) and the right piece material (1.2), and a fixed clamp (3) cooperating with the support base (15) is provided above the left piece material (1.1) and the right piece material (1.2).

9. The welding tool for improving the utilization rate of hot-formed materials by butt welding according to claim 9 is characterized in that: A wheel hub (13) is provided below the base (14).

10. The welding tool for improving the utilization rate of hot-formed materials by butt welding according to claim 9, characterized in that: There are five supporting bases (15) in total, and the supporting bases (15) are in an I-shaped structure.

11. The welding tool for improving the utilization rate of hot-formed materials by butt welding according to claim 9, characterized in that: The fixing splints (3) are provided in three pieces in total, the fixing splints (3) on both sides are in an I-shape, and the fixing splint (3) in the middle is in an F-shape.

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