A forming method and device for a thick plate punching-forging composite fine blanking continuous die

Abstract

The present invention discloses a forming method and device for a thick plate stamping-forging composite fine blanking continuous die. The device includes a lower die base, an upper die base, a blank holding ring, a floating female die, a blanking punch, a conventional punch, a counter pressure block, and a power driving device. A floating female die is arranged on the lower die base. A conventional punch and a special-shaped forming punch are arranged inside the floating female die. A blank holding ring for pressing the workpiece to be processed is arranged below the upper die base. The blanking punch is arranged below the upper die base and can pass through the blank holding ring to punch the workpiece to be processed. Above the special-shaped forming punch, there is a counter pressure block driven by the power driving device to move vertically downward, and the special-shaped feature of the workpiece to be processed is forged and formed by the special-shaped forming punch and the counter pressure block. By means of the forming method and device of the present invention, punching and forging of the special-shaped forming features on the surface of the part are completed. The produced part not only has high profile accuracy, but also has a good surface, reduces the processing procedures, lowers the manufacturing cost, and improves the production efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of machining, and in particular to a forming method and device for a thick plate punching-forging composite fine blanking continuous die. Background Art

[0002] As Figure 5 and Figure 6 shown, for stamping parts with high precision requirements for the outer shape and large forming features at the same time, there are 2 conventional processing methods for such parts: 1. Using the forging process to make the forming features, leaving machining allowance for the outer shape, and then using the machining method to machine the outer shape to the size; 2. Using the fine blanking process to punch the outer shape of the part in place, and then using the machining method to machine the forming features to the size; Forgings cannot guarantee the accuracy of the outer shape, and fine blanks cannot guarantee the forming features. At present, machining processes are used in the market to make up for their respective deficiencies, increasing the cost of the parts. These two methods require a lot of labor. During the machining operation, repeated positioning is required, the machining accuracy is difficult to guarantee, the machining time is long, resulting in high costs. Summary of the Invention

[0003] The purpose of the present invention is to overcome the defects of the above-mentioned prior art, and to propose a forming method and device for a thick plate punching-forging composite fine blanking continuous die.

[0004] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0005] A forming method for a thick plate punching-forging composite fine blanking continuous die, the steps are as follows:

[0006] The first working step: Put the plate into the punching-forging composite fine blanking continuous die forming device to punch a guide hole and a pre-cut hole at the forming position; the guide hole is used for positioning and machining; the pre-cut hole corresponds to the forming surface position and is used for material flow during forging and forming.

[0007] The second working step: Adopt the forging method, and use the special-shaped forming punch in the punching-forging composite fine blanking continuous die forming device to forge the forming surface to obtain the required forming surface.

[0008] The third working step: Use a tooth ring pressure plate to press the plate after the second working step, and then perform punching and blanking to obtain the product.

[0009] The present invention also provides a thick plate punching and forging composite fine blanking continuous die forming device, including a lower die base, an upper die base, a gear ring pressure plate, a floating die, a blanking punch, a conventional punch, a back pressure block and a power drive device; a floating die is provided on the lower die base; a conventional punch and a special-shaped forming punch are provided in the floating die; a gear ring pressure plate for pressing the workpiece to be processed is provided below the upper die base; the blanking punch is provided below the upper die base and can punch and cut the workpiece to be processed through the gear ring pressure plate; a back pressure block driven vertically downward by a power drive device is provided above the special-shaped forming punch, and the special-shaped feature forging and forming of the workpiece to be processed is performed by the special-shaped forming punch and the back pressure block.

[0010] Furthermore, the special-shaped forming punch is provided with a punch special-shaped surface which is an upward special-shaped feature surface to be processed; the special-shaped forming punch is also provided with a pressure relief hole.

[0011] Furthermore, the power drive device includes a pressure block for driving the upper die seat to press downward and an upper die force transmission rod for driving the counter-pressure block to press downward; the counter-pressure block is fixed in a groove on the lower surface of the gear ring pressure plate.

[0012] Furthermore, an upper pad is fixedly connected to the bottom of the upper die base; an intermediate template is provided on the upper surface of the ring gear pressure plate; a guide hole punch and a pre-cutting punch are installed on the lower surface of the intermediate template; the ring gear pressure plate is provided with vertical through holes corresponding to the guide hole punch and the pre-cutting punch; the upper pad can move downward and be pressed into the groove of the intermediate template, driving the guide hole punch and the pre-cutting punch to pass through the through hole to punch the workpiece to be processed.

[0013] Furthermore, the blanking punch is fixed to the upper pad, and the blanking punch is located above the part of the workpiece to be processed that needs to be punched. When the upper pad is pressed down, the blanking punch passes through the gear ring pressure plate and punches into the floating die to punch the workpiece to be processed; a penetrating punching ejector rod is also provided in the blanking punch.

[0014] Furthermore, a pre-cut die insert and a blanking punch insert are provided in the floating die; the position of the pre-cut die insert corresponds to the vertical position of the guide hole punch and the pre-cut punch; the blanking punch insert corresponds to the vertical position of the blanking punch and the punching ejector rod; the pre-cut die insert and the blanking punch insert are both fixed on the upper surface of the floating die pad; and a positioning pin is provided on the floating die pad.

[0015] Further, a lower backing plate is arranged under the floating female die backing plate; the lower backing plate is fixed on the lower die base; a pre-cut ejector rod, a guide hole ejector rod, a blanking ejector rod and a floating male die ejector rod are arranged on the lower die base; the pre-cut ejector rod, the guide hole ejector rod, the blanking ejector rod and the floating male die ejector rod are all connected to the elastic force grooves corresponding to the lower die base and the lower backing plate through compression springs and limit sleeves, and the pre-cut ejector rod, the guide hole ejector rod and the blanking ejector rod respectively pass through the floating female die backing plate and the pre-cut female die insert block and correspond to the pre-cut punch, the guide hole punch and the blanking punch; a group of floating male die ejector rods are located at both ends under the floating female die backing plate for support.

[0016] Further, a pre-cut ejecting block is arranged at the upper end of the pre-cut ejector rod; a ejector is arranged on the upper surface of the blanking ejector rod; a punching sleeve is arranged on the upper surface of the ejector; a guide hole corresponding to a conventional punch is arranged on the punching sleeve.

[0017] Further, the special-shaped forming punch passes through the floating female die backing plate and is fixed on the lower backing plate through a fixing bolt.

[0018] Through the forming device and the forming method of the present invention, punching and forging of the special-shaped forming features on the surface of the part are completed. The produced part not only has high profile accuracy, but also has a good surface, reduces the machining process, reduces the processing time, reduces the number of operators, greatly reduces the manufacturing cost and improves the production efficiency. Description of the Drawings

[0019] Figure 1 It is a schematic structural diagram of the forming device of the present invention when the die is closed in section.

[0020] Figure 2 It is a schematic structural diagram of the forming device of the present invention when the die is opened in section.

[0021] Figure 3 It is a schematic structural diagram of the special-shaped forming punch of the present invention.

[0022] Figure 4 It is a schematic structural diagram of the connection between the ejector and the conventional punch of the present invention.

[0023] Figure 5 It is a workpiece to be processed with an inclined forming surface.

[0024] Figure 6 It is a workpiece to be processed with an R-shaped forming surface.

[0025] Figure 7 It is the processing steps of the workpiece to be processed with an inclined forming surface.

[0026] Figure 8 It is the processing steps of the workpiece to be processed with an R-shaped forming surface.

[0027] Wherein: lower die base 1; upper die base 2; intermediate template 3; blankholder ring 4; upper backing plate 5; floating female die 6; floating female die backing plate 7; lower backing plate 8; pilot punch 9; pre-cut punch 10; pre-cut female die insert 11; pre-cut ejector block 12; pre-cut ejector rod 13; pilot ejector rod 14; locating pin 15; special-shaped forming punch 16; pressure pad 17; blanking punch 18; punching ejector rod 19; blanking punch insert 20; conventional punch 21; ejector 22; blanking ejector rod 23; floating punch ejector rod 24; upper die force transmission rod 25; fixing bolt 26; punching sleeve 27; compression spring 28; limit sleeve 29; pressure relief hole 161; special-shaped surface of punch 162. Specific embodiments

[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0029] Embodiment 1

[0030] A forming method for a thick plate punching-forging composite fine blanking continuous die is as follows:

[0031] The first step: Place the plate into the punching-forging composite fine blanking continuous die forming device to punch the pilot hole and the pre-cut hole at the forming position; the pilot hole is used for positioning during processing; the pre-cut hole corresponds to the position of the forming surface and is used for material flow during forging and forming.

[0032] The second step: Adopt a forging method to forge the forming surface through the special-shaped forming punch in the punching-forging composite fine blanking continuous die forming device to obtain the required forming surface.

[0033] The third step: Use the blankholder ring to press the plate after the second step, and then perform punching and blanking to obtain the product.

[0034] Embodiment 2

[0035] Such as Figure 1 And Figure 2As shown in the figure, a thick plate stamping-forging composite fine blanking continuous die forming device includes a lower die base 1, an upper die base 2, a blank holding ring 4, a floating female die 6, a blanking punch 18, a conventional punch 21, a counter-pressure block 17, and a power driving device; a floating female die 6 is arranged on the lower die base 1; a conventional punch 21 and a special-shaped forming punch 16 are arranged inside the floating female die 6; a blank holding ring 4 for pressing the workpiece to be processed is arranged below the upper die base 2; the blanking punch 18 is arranged below the upper die base 2 and can pass through the blank holding ring 4 to punch the workpiece to be processed; a counter-pressure block 17 driven by the power driving device to move vertically downward is arranged above the special-shaped forming punch 16, and the special-shaped forming punch 16 and the counter-pressure block 17 are used to forge and form the special-shaped features of the workpiece to be processed. Precise processing of punching and forging the special-shaped surface can be carried out simultaneously on a machining equipment. The produced parts not only have high profile accuracy but also have a good surface, reducing the processes of machining the surface, reducing the processing time, reducing the manufacturing cost, and improving the production efficiency.

[0036] Embodiment 3

[0037] As Figure 3 and Figure 7 、 Figure 8 As shown in the figure, the special-shaped forming punch 16 is provided with a punch special-shaped surface 162 of the special-shaped feature surface to be processed upward; the special-shaped forming punch 16 is also provided with a pressure relief hole 161. Specifically, as Figure 1 and Figure 2 shown in the figure, when the die is in the open state, the special-shaped forming punch 16 is lower than the floating female die 6. When closed, the floating female die 6 and the floating female die backing plate 7 move downward and contact the lower backing plate 8, then the punch special-shaped surface 1,62 of the special-shaped forming punch 16 exposes out of the floating female die 6. At this time, the special-shaped forming punch 16 and the counter-pressure block 17 forcibly forge the workpiece to be processed to form the forming surface feature. The punch special-shaped surface 162 can be designed and used according to the special-shaped feature surface to be processed. Through forging and forming, it has high profile accuracy and also has a good surface. At the same time, the pressure relief hole 161 provided is beneficial to forging and forming, avoiding the energy consumption of forging caused by air compression. When it is necessary to process Figure 7 the forming inclined surface shown in the figure, the punch special-shaped surface 162 is set to a convex inclined surface structure. When it is necessary to process Figure 8 the R-shaped surface shown in the figure, the punch special-shaped surface 162 is set to an R-shaped convex structure. Just set the structure of the punch special-shaped surface 162 corresponding to the needs of the special-shaped feature surface.

[0038] As a preferred embodiment, the power driving device includes a pressure block for driving the upper die base 2 to press down and an upper die force transmission rod 25 for driving the counter-pressure block 17 to press down; the counter-pressure block 17 is fixed in the groove on the lower surface of the blank holding ring 4.

[0039] As a preferred embodiment, an upper pad 5 is fixedly connected to the bottom of the upper die base 2; an intermediate template 3 is provided on the upper surface of the ring gear pressure plate 4; a guide hole punch 9 and a pre-cutting punch 10 are installed on the lower surface of the intermediate template 3; the ring gear pressure plate 4 is provided with vertical through holes corresponding to the guide hole punch 9 and the pre-cutting punch 10; the upper pad 5 can move downward and be pressed into the groove of the intermediate template 3, driving the guide hole punch 9 and the pre-cutting punch 10 to pass through the through hole to punch the workpiece to be processed, thereby realizing the punching operation of the workpiece to be processed.

[0040] As a preferred embodiment, the blanking punch 18 is fixed to the upper pad 5. The blanking punch 18 is located above the part of the workpiece that needs to be punched, and when the upper pad 5 is pressed down, it punches through the gear ring pressure plate 4 into the floating die 6 to punch the workpiece; a penetrating punching ejector rod 19 is also provided in the blanking punch 18. As a preferred embodiment, a pre-cut die insert 11 and a blanking punch insert 20 are provided in the floating die 6; the position of the pre-cut die insert 11 corresponds to the vertical position of the guide hole punch 9 and the pre-cut punch 10; the blanking punch insert 20 corresponds to the vertical position of the blanking punch 18 and the punching ejector rod 19; the pre-cut die insert 11 and the blanking punch insert 20 are both fixed on the upper surface of the floating die pad 7; a positioning pin 15 is provided on the floating die pad 7. As Figure 1 and Figure 2 As shown, when the mold is closed, the guide hole punch 9 punches a guide hole in the workpiece to be processed. Before the subsequent work step begins, a positioning pin 15 is inserted into this hole to guide the material and ensure the accurate step distance of the continuous die. After punching, the workpiece can be ejected effectively. A compressed air chip removal tube can be provided in the device. When the mold is opened, the waste from the guide hole punch 9 and the pre-cut punch 10 is respectively ejected from the surface of the floating die 6 by the guide hole ejector rod 14 and the pre-cut ejector block 12 and pre-cut ejector rod 13. The waste is then blown away from the mold by compressed air to purge and remove chips.

[0041] As a preferred embodiment, Figure 4As shown, a lower backing plate 8 is provided under the floating female die backing plate 7; the lower backing plate 8 is fixed on the lower die base 1; a pre-cut ejector rod 13, a guide hole ejector rod 14, a blanking ejector rod 23 and a floating punch ejector rod 24 are provided on the lower die base 1; the pre-cut ejector rod 13, the guide hole ejector rod 14, the blanking ejector rod 23 and the floating punch ejector rod 24 are all connected to the elastic force grooves corresponding to the lower die base 1 and the lower backing plate 8 through compression springs 28 and limit sleeves 29 (the connection diagrams of the compression springs 28 on the pre-cut ejector rod 13, the guide hole ejector rod 14 and the floating punch ejector rod 24 and the limit sleeves 29 are omitted and not drawn separately, with the same principle), and the pre-cut ejector rod 13, the guide hole ejector rod 14 and the blanking ejector rod 23 respectively pass through the floating female die backing plate 7 and the pre-cut female die insert 11 and correspond to the pre-cut punch 10, the guide hole punch 9 and the blanking punch 18; a group of floating punch ejector rods 24 are located at both ends below the floating female die backing plate 7 for support.

[0042] As a preferred embodiment, a pre-cut ejector block 12 is provided at the upper end of the pre-cut ejector rod 13; a ejector 22 is provided on the upper surface of the blanking ejector rod 23; a punching sleeve 27 is provided on the upper surface of the ejector 22; a guide hole corresponding to a conventional punch 21 is provided on the punching sleeve 27. The ejector 22 and the blanking ejector rod 23 eject the processed workpiece out of the surface of the floating female die 6 and blow it away to the rear of the die by compressed air and convey it into the material box by a conveyor belt. As a preferred embodiment, the special-shaped forming punch 16 passes through the floating female die backing plate 7 and is fixed on the lower backing plate 8 by a fixing bolt 26. The present invention can be produced on a fine blanking press by a fine blanking progressive die forming device for processing that requires both punching and forging of special-shaped surfaces, effectively reducing the problem of repeated positioning, and eliminating the machining chamfering process, reducing the input of labor, equipment, management, etc., so as to meet the requirements of ensuring product accuracy and reducing the manufacturing cost of parts.

[0043] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A forming method for a thick plate punching-forging composite fine blanking continuous die, characterized in that: Here are the steps: The first step: Place the sheet into the punching and forging composite fine punching continuous die forming device to punch the guide hole and pre-cut hole at the forming position; the guide hole is used for positioning processing; the pre-cut hole corresponds to the position of the forming surface, which is used for material flow during forging and forming; The second step: using a forging method, the forming surface is forged by a special-shaped forming punch in a punching and forging composite fine punching continuous die forming device to obtain the desired forming surface; The third process step: using a gear ring pressure plate to press the plate after the second process step, and then punching and blanking are performed to obtain the product; the punching and forging composite fine blanking continuous die forming device comprises a lower die base, an upper die base, a gear ring pressure plate, a floating die, a blanking punch, a conventional punch, a counter-pressure block and a power drive device; a floating die is provided on the lower die base; a conventional punch and a special-shaped forming punch are provided in the floating die; a gear ring pressure plate is provided below the upper die base to press the workpiece to be processed; the blanking punch is provided below the upper die base, and can punch and cut the workpiece to be processed through the gear ring pressure plate; a counter-pressure block is provided above the special-shaped forming punch, which is driven by a power drive device to move vertically downward, and the special-shaped forming punch and the counter-pressure block are used to perform special-shaped feature forging on the workpiece to be processed; The special-shaped forming punch is provided with a punch special-shaped surface with a special-shaped feature surface that is upward and needs to be processed; the special-shaped forming punch is also provided with a pressure relief hole; An upper pad is fixedly connected to the bottom of the upper die seat; an intermediate template is provided on the upper surface of the ring gear pressure plate; a guide hole punch and a pre-cutting punch are installed on the lower surface of the intermediate template; vertical through holes corresponding to the guide hole punch and the pre-cutting punch are provided on the ring gear pressure plate; the upper pad can move downward and be pressed into the groove of the intermediate template, driving the guide hole punch and the pre-cutting punch to pass through the through hole to punch the workpiece to be processed.

2. A method for forming a thick plate punching-forging composite fine blanking continuous die according to claim 1, characterized in that: The power drive device includes a pressure block for driving the upper die seat to press downward and an upper die force transmission rod for driving the counter-pressure block to press downward; the counter-pressure block is fixed in a groove on the lower surface of the gear ring pressure plate.

3. A method for forming a thick plate punching-forging composite fine blanking continuous die according to claim 1, characterized in that: The blanking punch is fixed to the upper pad, and is located above the part of the workpiece to be processed that needs to be punched. When the upper pad is pressed down, the blanking punch passes through the gear ring pressure plate and punches into the floating die to punch the workpiece to be processed. A penetrating punching ejector rod is also provided in the blanking punch.

4. A method for forming a thick plate punching-forging composite fine blanking continuous die according to claim 3, characterized in that: A pre-cut die insert and a blanking punch insert are provided in the floating die; the position of the pre-cut die insert corresponds to the vertical position of the guide hole punch and the pre-cut punch; the blanking punch insert corresponds to the vertical position of the blanking punch and the punching ejector rod; the pre-cut die insert and the blanking punch insert are both fixed on the upper surface of the floating die pad; a positioning pin is provided on the floating die pad.

5. A forming method of a thick plate punching-forging composite fine blanking continuous die according to claim 4, characterized in that: A lower backing plate is provided under the floating female die backing plate; the lower backing plate is fixed on the lower die base; a pre-cut ejector rod, a guide hole ejector rod, a blanking ejector rod, and a floating punch ejector rod are provided on the lower die base; the pre-cut ejector rod, the guide hole ejector rod, the blanking ejector rod, and the floating punch ejector rod are all connected to the elastic force grooves corresponding to the lower die base and the lower backing plate through compression springs and limit sleeves, and the pre-cut ejector rod, the guide hole ejector rod, and the blanking ejector rod respectively pass through the floating female die backing plate and the pre-cut female die insert and correspond to the pre-cut punch, the guide hole punch, and the blanking punch; a group of floating punch ejector rods are located at both ends under the floating female die backing plate for support.

6. A method for forming a thick plate by stamping-forging composite fine blanking continuous die according to claim 5, characterized in that: A pre-cut ejector block is provided at the upper end of the pre-cut ejector rod; a ejector is provided on the upper surface of the blanking ejector rod; a punching sleeve is provided on the upper surface of the ejector; a guide hole corresponding to a conventional punch is provided on the punching sleeve.

7. A forming method for a thick plate stamping-forging composite fine blanking continuous die according to claim 5, characterized in that: The special-shaped forming punch passes through the floating female die backing plate and is fixed on the lower backing plate by fixing bolts.

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