A blanking die

Abstract

A blanking die comprises a die frame, the die frame comprises an upper die plate, a lower die plate, and a guide mechanism; a blanking die and a cutter assembly are installed at the front between the upper die plate and the lower die plate, the cutter assembly comprises a left cutter assembly and a right cutter assembly, and the blanking die is located between the left cutter assembly and the right cutter assembly; the blanking die comprises a concave die and a convex die; the left cutter assembly and the right cutter assembly both comprise an upper cutter assembly and a lower cutter, the upper cutter assembly comprises an upper cutter and a cutter mounting seat, the cutter mounting seat comprises a slider guide plate and a cutter guide sleeve, a guide groove is provided in the slider guide plate, a cylinder piston rod extends into the guide groove from the rear of the slider guide plate, a cutter hole is provided at the bottom of the front of the slider guide plate, and the end of the cylinder piston rod is connected to a slider for opening / closing the cutter hole. When blanking, the cutter can cut off excess scraps as needed, thereby solving the problem that the scraps of a whole steel plate used for blanking will interfere with the equipment and guide pillars, and the operation efficiency is high.

Description

Technical Field

[0001] The invention belongs to the technical field of stamping processing and relates to a blanking device. Background Art

[0002] In the current fiercely competitive environment, reducing production costs is an effective way for manufacturing and processing companies to increase profits, and improving material utilization is an effective means to reduce production costs.

[0003] The current common cutting process (such as Figure 1 ) is shearing (cutting the steel plate into strips with a width close to the blanking size to suit the operation and meet the processing size of the stamping equipment), blanking (punching out suitable blanks from the strips). This process has many disadvantages:

[0004] 1. Low utilization rate: For parts with round or similar shapes, there are a lot of scraps between strips and cakes. The irregular shapes of these scraps are difficult to reuse and can only be treated as waste, which is a huge waste for the company. Take the blanking size of φ200 as an example. If a steel plate with a suitable multiple of 1430×2490×3 is selected, each plate can cut 12 strips, each strip can blank 7 pieces, and the whole steel plate can blank 84 pieces. The material utilization rate is only 74%, and the remaining 26% is a huge waste as scraps.

[0005] Second, there are many processes, the material size is large, and the efficiency is low: at least two processes are required, involving shearing machines for cutting, punching machines for blanking and other equipment. If manual work is used, the movement of strips between processes must be considered, and there are many pauses in the middle, which cannot achieve continuous operation. If automation is used, it is necessary to consider the loading of sheet materials into the shearing machine, automatic feeding, the flow of sheared strips to the punching machine, and automatic feeding of strips to the punching machine. The efficiency is not high, and it occupies a large area and is expensive. Summary of the invention

[0006] The purpose of the present invention is to overcome the above-mentioned shortcomings of the prior art and to propose a blanking die that meets the throat depth size requirements of current equipment. When processing large-sized materials, the remaining scraps can be sheared off after blanking to avoid interference with the guide columns of the equipment or tooling. Continuous operation can be achieved, which is suitable for mass production, reduces the number of processes, and improves operating efficiency.

[0007] The technical scheme of the present invention is as follows: it comprises a die frame, the die frame comprises an upper die plate, a lower die plate, and a guide mechanism installed at the rear between the upper die plate and the lower die plate; a blanking die and a cutter assembly are installed at the front between the upper die plate and the lower die plate, the cutter assembly comprises a left cutter assembly and a right cutter assembly, and the blanking die is located between the left cutter assembly and the right cutter assembly; the blanking die comprises a concave die located at the lower part, and a convex die located at the upper part and arranged opposite to the concave die; the left cutter assembly and the right cutter assembly both comprise an upper cutter assembly and a lower cutter, and the upper cutter assembly comprises an upper cutter arranged opposite to the lower cutter and a cutter mounting seat, The cutter mounting seat includes a slider guide plate and a cutter guide sleeve. The slider guide plate is provided with a guide groove. The cylinder piston rod extends into the guide groove from the rear of the slider guide plate. A cutter hole connected to the guide groove is opened at the front bottom of the slider guide plate. The upper cutter is mounted at the cutter hole through the cutter guide sleeve. The end of the cylinder piston rod is connected to a slider for opening / closing the cutter hole. When the cylinder piston rod drives the slider to retract backward until the cutter hole is opened, the guide groove is connected to the cutter hole to form a retreat groove for allowing the upper cutter to move upward. When the cylinder piston rod drives the slider to extend forward until the cutter hole is closed, the upper cutter is fixed in the cutter hole.

[0008] A stopper matched with the step of the upper cutter tail is arranged at the lower side of the inner wall of the cutter guide sleeve.

[0009] The length of the slider is smaller than the length of the guide groove.

[0010] A backing plate 1 is arranged between the cutter mounting seat and the upper template.

[0011] The cutter mounting seat, the backing plate 1 and the upper template are connected via a positioning pin 1 and a bolt 1.

[0012] The cylinder barrel is fixed to the cutter mounting seat and the rear part of the backing plate through a cylinder fixing plate.

[0013] The guide mechanism is a rolling guide mechanism, including a guide column and a guide sleeve matched with the guide column. The guide column is provided with a spring, a ball and a ball retainer. The ball is mounted on the outer wall of the guide column via the ball retainer.

[0014] The punch fixed on the fixed plate is positioned by the positioning column and then installed on the backing plate 2 by bolt 2, and the backing plate 2 is fixed on the upper template by positioning pin 2 and bolt 3;

[0015] The concave die is fixed in the fixing seat by fixing bolt 2, and the fixing seat is fixed on the lower template by bolt 5.

[0016] The stripper plate and the second spring are mounted on the fixed plate through stripper screws.

[0017] The layout on the steel plate to be processed between the die and the punch is staggered, and the parts of two adjacent layers are arranged alternately.

[0018] The present invention eliminates the shearing process and adopts the method of staggered arrangement on the steel plate to reduce the material waste between parts. Taking the round cake material with a blanking size of φ200 as an example, a steel plate with a suitable multiple of 1460×2450×3 is selected, and each plate can blank 7 pieces, and the whole steel plate can blank 92 pieces, and the material utilization rate is increased to 80.8%, an increase of 6.8%. If such parts originally use 5,000 tons of materials per year, 340 tons of materials can be saved per year after production according to this invention, which is very beneficial for energy conservation, emission reduction and cost saving.

[0019] In order to meet the current equipment throat depth requirements (the distance from the center of the slider to the fuselage, such as 400mm for an ordinary 200-ton punch press), the remaining scraps need to be sheared off after blanking to avoid interference with the guide pillars of the equipment or tooling. The method adopted by the present invention is to add a cutter on each side of the blanking die. When the steel plate is fed to the left for blanking, the cutter on the left works to cut off the waste, and the cutter on the right does not work to avoid damaging the steel plate; when the steel plate is fed to the right, the cutter on the right works, and the cutter on the left does not work. In this way, continuous blanking is achieved without stopping the machine. The present invention improves material utilization, reduces processes, and improves operating efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is the existing cutting process;

[0021] Figure 2 It is a staggered pattern arrangement process method;

[0022] Figure 3 It is a schematic diagram of steel plate shearing during processing;

[0023] Figure 4 It is a schematic diagram of the structure of the present invention;

[0024] Figure 5 yes Figure 4 Side view of

[0025] Figure 6 It is a structural diagram of the mold frame;

[0026] Figure 7 yes Figure 6 Top view after removing the upper template;

[0027] Figure 8 is a schematic diagram of the structure of the left cutter assembly;

[0028] Fig. 9 yes Figure 8 Side view of

[0029] Fig.10 It is a structural schematic diagram of the blanking die;

[0030] In the figure, the die frame 1, the left scissors 2, the blanking die 3, the right cutter 4, the upper die 5, the upper right cutter 6, the lower right cutter 7, the lower die 8, the upper left cutter 9, the lower left cutter 10, the cylinder 11; the lower die plate 101, the spring 102, the guide column 103, the ball 104, the ball retainer 105, the guide sleeve 106, the upper die plate 107, the blanking hole 108; the lower left cutter 10, the upper left cutter 9, the cutter guide sleeve 201, the slider guide plate 202, the screw Bolt 1 203, pad 1 204, locating pin 1 205, cylinder 11, cylinder fixing plate 206, slider 207; fixing seat 301, fixing bolt 2 302, die 303, stripping plate 304, spring 2 305, bolt 3 306, locating column 307, locating pin 2 308, pad 2 309, fixing plate 310, unloading screw 311, bolt 312, punch 313, bolt 5 314, bolt 2 315. DETAILED DESCRIPTION

[0031] Figure 1 It is a universal blanking process: firstly, a shearing machine is used to shear the whole steel plate 12 into several steel strips 121 to meet the size requirements of the subsequent blanking punch, and then a punch is used to blank the blanks 1201 piece by piece. The remaining scraps after blanking can only be treated as waste.

[0032] Figure 2 , Figure 3 They are the process method of staggered arrangement and the schematic diagram of the processing process. Arrange the pattern directly on the steel plate 13, and arrange the parts in different rows in a staggered manner to reduce the remaining scraps between parts. It is particularly suitable for round parts or other parts with a large number of corners between parts that can be used in the next row. The whole steel plate 13 is directly blanked into blanks 131 by a punch press, and the first row of blanks is staggered with the second row; when blanking, the excess scraps are cut off one by one, which solves the problem of preventing the waste after blanking from interfering with the mold guide column and equipment due to the size limitation of the punch press.

[0033] Figure 4 , 5In the figure, the mold includes a mold frame 1, a left scissors 2, a blanking mold 3, a right cutter 4 and other devices. These devices are divided into upper and lower parts, which are installed on the upper mold plate 107 and the lower mold plate 101 of the mold frame 1 to form an upper mold 5 and a lower mold 8. The punch and the material removal device of the blanking mold 3, the upper right cutter 6 and the upper left cutter 9 are installed on the upper mold plate 107 to form an upper mold 5; the concave mold of the blanking mold 3 and the lower right cutter 7 and the lower left cutter 10 are installed on the lower mold plate 101 to form a lower mold 8. The left scissors 2, the right cutter 4, the upper right cutter 6 and the upper left cutter 9 are respectively arranged on the left and right sides of the blanking mold 3, and the cylinders 11 are respectively arranged on the rear sides. When the upper right cutter 6 and the upper left cutter 9 are working, the cylinder 11 is pushed out, and when they are not working, the cylinder 11 can be retracted. The upper mold 5 and the lower mold 8 are respectively fixed on the slider and the workbench of the punch press, and the upper mold 5 moves up and down with the slider of the equipment to realize the whole processing process. The steel plate is placed on a platform for automatic feeding. When the steel plate reaches the blanking die 3, blanking begins. At this time, the upper right cutter 6 retreats under the action of the cylinder 11 (one cylinder for each upper left and right cutter) (until the next row of blanking begins). After blanking, the steel plate moves left and continues the next blanking. When the scrap reaches the left cutter 2 position, the scrap is sheared while blanking (the effect is as follows Figure 3 ), and so on, until the first row is blanked and sheared, pause, remove the sheared scraps, then feed the steel plate toward the punch press and move right, reaching the leftmost blanking position of the second row - at the same time, the upper left cutter 9 retreats under the action of the cylinder 11, and the right cutter starts working under the action of the cylinder 11 - start blanking at the first position of the second row, then the steel plate moves right, and the working principle is the same as the first row. After the second row is blanked, the third row, the fourth row... are switched in turn until the entire steel plate is blanked.

[0034] Figure 6 , 7 In the process, the guide pin 103 and the guide sleeve 106 are arranged at the rear side of the entire mold, and sufficient space is left to facilitate the cut scraps to move with the steel plate, so as to avoid the scraps after packaging and blanking from colliding with the guide pins. In order to ensure the accuracy and reliability of the mold, 4 sets of guide pin and guide sleeve assemblies are set. In order to improve the life of the mold, the guide pin and guide sleeve adopt a rolling guide structure, and a spring 102, a ball 104 and a ball retainer 105 are arranged on the guide pin 103. When the upper mold 5 moves downward, the ball 104 and the ball retainer 105 enter the guide sleeve, and the ball 104 rolls on the outer wall of the guide pin 103 and the inner wall of the guide sleeve 106, which reduces wear and improves life compared with ordinary sliding guide pins and guide sleeves, and can ensure large-scale operation. A blanking hole 108 is arranged at the center of the installation position of the die 303, and the punched parts or blanks fall from this hole into the conveyor belt arranged under the punch press, and the dropped parts are taken away, thereby realizing continuous operation.

[0035] Figure 8 , 9In the figure, the lower left cutter 10 is fixed on the lower template 101 and is installed on the punching machine workbench during operation and is not allowed to be immobile. The upper left cutter 9 is installed in the cutter guide sleeve 201, and the cutter guide sleeve 201 is provided with a slider guide plate 202 and a slider 207, and finally fixed to the upper template 107 together with the backing plate 204 by bolts 203 and positioning pins 205. The cylinder 11 is fixed to the cutter guide sleeve 201 and the backing plate 204 through the cylinder fixing plate 206, and the slider 207 is connected to the cylinder rod, and can move forward and backward under the action of the cylinder, thereby realizing whether the cutter is working.

[0036] Fig.10 In the figure, the female die 303 is fixed in the fixing seat 301 by the fixing bolt 2 302, and the fixing seat is fixed to the lower template by the bolt 5 314; in this way, the female die 303 can be quickly replaced by removing the fixing bolt 2 302. The material removal device is installed on the fixing plate 310, and the material removal device includes the material removal plate 304, the spring 2 305, and the screw 311. The punch 313 is fixed to the fixing plate 310 by the bolt 312, and the punch 313 is positioned by the positioning column 307 and then installed on the backing plate 2 309 through the fixing plate 310 by the bolt 2 315, and the backing plate 2 309 is fixed to the upper template 107 by the positioning pin 2 308 and the bolt 306. In order to ensure the purpose of quick replacement, the blanking die is provided with a positioning column 307 or a fixing seat 301 at the installation position of the working part, and the working part can be quickly switched by removing a few screws. When replacing, it is only necessary to remove the bolt 2 315 to quickly remove the punch 313 and the material withdrawal device, so that the working part of the mold frame 1 can be quickly switched without disassembling.

Claims

1. A blanking die, characterized in that: The mold frame (1) comprises an upper mold plate (107), a lower mold plate (101), and a guide mechanism installed at the rear between the upper mold plate (107) and the lower mold plate (101); a blanking mold (3) and a cutter assembly are installed at the front between the upper mold plate (107) and the lower mold plate (101); the cutter assembly comprises a left cutter assembly and a right cutter assembly; the blanking mold (3) is located between the left cutter assembly and the right cutter assembly; the blanking mold (3) comprises a concave mold (303) located at the bottom and a convex mold (313) located at the top and arranged opposite to the concave mold (303); the left cutter assembly and the right cutter assembly both comprise an upper cutter assembly and a lower cutter; the upper cutter assembly comprises an upper cutter arranged opposite to the lower cutter and a cutter mounting seat; the cutter mounting seat comprises a slide guide plate (202), a cutter guide sleeve (201), a guide groove is provided in the slider guide plate (202), a piston rod of the cylinder (11) extends into the guide groove from the rear of the slider guide plate (202), a cutter hole connected to the guide groove is opened below the front of the slider guide plate (202), an upper cutter is installed at the cutter hole through the cutter guide sleeve (201), an end of the piston rod of the cylinder (11) is connected to a slider (207) for opening / closing the cutter hole, when the piston rod of the cylinder (11) drives the slider (207) to retract backward until the cutter hole is opened, the guide groove is connected to the cutter hole to form a cutter retraction groove for allowing the upper cutter to move upward, when the piston rod of the cylinder (11) drives the slider (207) to extend forward until the cutter hole is closed, the upper cutter is fixed in the cutter hole; a conveyor belt is arranged under the blanking die (3).

2. The blanking die according to claim 1, characterized in that: The inner wall of the cutter guide sleeve (201) is provided with a stopper matched with the step at the tail of the upper cutter.

3. The blanking die according to claim 1, characterized in that: The length of the sliding block (207) is smaller than the length of the guide groove.

4. The blanking die according to claim 1, characterized in that: A backing plate 1 (204) is provided between the cutter mounting seat and the upper template (107).

5. The blanking die according to claim 4, characterized in that: The cutter mounting seat, backing plate 1 (204) and upper template (107) are connected via positioning pin 1 (205) and bolt 1 (203).

6. The blanking die according to claim 4, characterized in that: The cylinder barrel of the air cylinder (11) is fixed to the cutter mounting seat and the rear portion of the backing plate (204) via a cylinder fixing plate (206).

7. The blanking die according to claim 1, characterized in that: The guide mechanism is a rolling guide mechanism, comprising a guide column (103) and a guide sleeve (106) matched with the guide column. The guide column (103) is provided with a spring 1 (102), a ball (104) and a ball retainer (105). The ball (104) is mounted on the outer wall of the guide column (103) via the ball retainer (105).

8. The blanking die according to claim 1, characterized in that: The convex mold (313) fixed on the fixed plate (310) is positioned by the positioning column (307) and then installed on the second pad (309) by the second bolt (315); the second pad (309) is fixed on the upper mold plate (107) by the second positioning pin (308) and the third bolt (306); The concave die (303) is fixed in the fixing seat (301) by means of fixing bolts 2 (302), and the fixing seat (301) is fixed on the lower die plate (101) by means of bolts 5 (314).

9. The blanking die according to claim 1, characterized in that: The stripping plate (304) and the second spring (305) are mounted on the fixing plate (310) via a stripping screw (311).

10. The blanking die according to claim 1, characterized in that: The arrangement of the steel plate to be processed between the concave die (303) and the convex die (313) is staggered arrangement, and the arrangement parts of two adjacent layers are arranged in a staggered manner.

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