Water-cooling stamping quenching test device for flat die

Abstract

The utility model discloses a water-cooling stamping quenching test device for a flat plate die, belongs to the technical field of plate hot forming quenching test equipment, and is used for carrying out water-cooling stamping quenching on a flat plate blank. According to the technical scheme, a die frame upper die plate and a die frame lower die plate are fixedly connected through four die frame supporting columns, a pressure cylinder is perpendicularly fixed to the upper surface of the die frame upper die plate, a pressure piston rod of the pressure cylinder penetrates through the die frame upper die plate to be connected with the upper portion of a die handle, the lower portion of the die handle is fixedly connected with the upper surface of a male die, and a female die is fixedly connected with the die frame lower die plate. The lower ends of the four die guide columns are fixedly connected with the four corners of the female die, sliding guide holes in the four corners of the male die are slidably connected with the upper ends of the four die guide columns, cooling water pipelines are arranged in the male die and the female die, and the universal water cooler is connected with the cooling water pipelines of the male die and the female die. The quenching process of the device is consistent with that of an actual production line, continuous plate die quenching test and sample preparation of the hot-formed steel plate can be completed, and technical support is provided for application performance detection of the hot-formed plate.

Description

Technical Field

[0001] This utility model discloses a flat plate mold water-cooled stamping and quenching test device, which belongs to the technical field of sheet metal hot forming quenching test equipment. Background Technology

[0002] Flat plate mold quenching test is a common test method for studying the properties of hot-formed steel after quenching. Currently, most of these tests are carried out on dedicated hot-forming production lines. The power system generally uses large-scale high-speed hydraulic presses, which are expensive and have high operating and maintenance costs. Using such production lines to carry out flat plate mold quenching tests consumes a lot of energy, seriously affects the production rhythm of the production line, has high test costs, and is inconvenient and inflexible in process adjustment.

[0003] To reduce testing costs, current methods such as water quenching are used for testing. However, these methods lack pressure holding and other process measures, differ significantly from actual hot forming production lines, and do not conform to real-world material application scenarios. Consequently, the test results obtained differ from actual field conditions. Therefore, designing a flat die stamping quenching test device with low manufacturing and operating costs, and consistent with actual production line operation, is an urgent issue that needs to be addressed. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a flat plate mold water-cooled stamping and quenching test device. This test device can realize rapid hot forming and quenching of hot-formed plates. The quenching process is consistent with the actual production line. It can realize the preparation of continuous quenched samples and has the advantages of flexible process setting, simple operation, low test cost, simple test device, easy maintenance and small footprint.

[0005] The technical solution to the above technical problem is:

[0006] A water-cooled stamping and quenching test device for a flat die includes a pressure cylinder, an upper die plate, a lower die plate, die support columns, a die handle, a punch, a die, die guide pillars, and a general-purpose water chiller. The upper and lower die plates are identical rectangular plates, placed parallel to each other vertically. The upper and lower die support columns are fixedly connected to the lower surface of the upper die plate and the four corners of the upper surface of the lower die plate, respectively. The upper die plate has a central hole. The pressure cylinder is vertically fixed to the upper surface of the upper die plate, and its piston rod passes through the hole in the upper die plate and connects to the upper part of the die handle. The punch and die are flat rectangular structures, parallel to each other vertically. Located between the upper and lower mold plates of the mold base, the lower surface of the die is fixedly connected to the upper surface of the lower mold plate. The lower ends of the four mold guide pillars are fixedly connected to the four corners of the upper surface of the die. The four corners of the punch have sliding guide holes. The upper ends of the four mold guide pillars pass through the sliding guide holes at the four corners of the punch. The mold guide pillars and the sliding guide holes are in a sliding fit. The lower part of the mold shank is fixedly connected to the upper surface of the punch. There are cooling water pipes inside the punch and die. The side walls of the punch and die each have a cooling water inlet and a cooling water outlet. A general-purpose water chiller is placed outside the upper and lower mold plates of the mold base. The water supply pipe and return pipe of the general-purpose water chiller are connected to the cooling water inlet and cooling water outlet on the side walls of the punch and die, respectively.

[0007] In the aforementioned flat mold water-cooled stamping and quenching test device, the lower surface of the upper template of the mold frame has positioning holes at the four corners, and the upper surface of the lower template of the mold frame has positioning screw holes at the four corners. The lower ends of the four mold frame supports are threaded and connected to the positioning screw holes at the four corners of the lower template of the mold frame. The upper ends of the four mold frame supports are inserted into the positioning holes at the four corners of the upper template of the mold. The upper template of the mold frame above the positioning holes has vertical bolt connection holes. The upper ends of the four mold frame supports have screw holes that are opposite to the bolt connection holes of the upper template of the mold frame. The connecting bolts are fixedly connected to the screw holes at the upper ends of the mold frame supports through the bolt connection holes.

[0008] In the aforementioned flat plate mold water-cooled stamping and quenching test device, the mold handle is a cylindrical body with a threaded inner hole. The lower end of the pressure piston rod of the pressure cylinder has a thread that matches the thread of the inner hole of the mold handle. The inner hole of the mold handle and the pressure piston rod of the pressure cylinder are connected by threads. An annular flange is welded to the lower end of the mold handle. The upper surface of the punch has a positioning slot at its center, which matches the flange at the lower end of the mold handle. The flange at the lower end of the mold handle is embedded in the positioning slot on the upper surface of the punch. Fastening bolts are used to fix the mold handle to the upper surface of the punch through the flange hole.

[0009] In the aforementioned flat die water-cooled stamping and quenching test device, the upper surface of the die has guide post fixing screw holes at the four corners. The lower ends of the four mold guide posts are threaded and connected to the guide post fixing screw holes at the four corners of the upper surface of the die. The center of the die has a vertical die fixing hole with a diameter matching the fixing bolt. The upper end of the die fixing hole has a large-diameter nut groove. The lower mold plate below the die fixing hole has corresponding screw holes. The fixing bolt is fixedly connected to the screw hole of the lower mold plate through the die fixing hole. The nut of the fixing bolt is located in the nut groove at the upper end of the die fixing hole, and the upper end face of the nut is lower than the upper surface of the die.

[0010] In the above-mentioned flat plate mold water-cooled stamping and quenching test device, the four mold guide pillars are respectively fitted with elastic support sleeves, the lower end faces of the four elastic support sleeves are in contact with the upper surface of the die, and the upper end faces of the four elastic support sleeves are opposite to the lower surface of the punch. The height of the elastic support sleeves is less than the thickness of the flat plate blank.

[0011] The beneficial effects of this utility model are:

[0012] The main frame structure of this utility model consists of an upper mold plate, a lower mold plate, and mold support columns. A pressure cylinder is fixed above the upper mold plate. The mold is placed in the cavity between the upper and lower mold plates. The pressure piston rod of the pressure cylinder is connected to the upper surface of the punch, which can drive the punch to slide along the mold guide post to press the workpiece. The punch and die are flat rectangular structures with internal cooling water pipes. The water supply and return pipes of a general-purpose water chiller are connected to the cooling water pipes through the cooling water inlet and cooling water outlet on the side walls of the punch and die, respectively, to quench the flat blank between the punch and die.

[0013] This utility model has a reasonable structure, is easy to use, simple to operate, and flexible process adjustment. The process conditions are close to actual production, the test accuracy is high, the equipment maintenance cost is low, and the quenching process is consistent with the actual production line. It can complete the continuous flat mold quenching test and sample preparation of hot-formed steel plates, providing strong technical support for the application performance testing of hot-formed plates and has great value for promotion and use. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 yes Figure 1 Side sectional view;

[0016] Figure 3 yes Figure 1 The center section view of the front view;

[0017] Figure 4 This is a cross-sectional view of the mold guide pillar.

[0018] The following are marked in the diagram: 1. Pressure cylinder; 2. Upper mold plate; 3. Lower mold plate; 4. Mold support; 5. Mold handle; 6. Punch; 7. Die; 8. Mold guide post; 9. General-purpose water chiller; 10. Round hole; 11. Pressure piston rod; 12. Sliding guide hole; 13. Cooling water inlet; 14. Cooling water outlet; 15. Positioning socket; 16. Positioning screw hole; 17. Bolt connection hole; 18. Connecting bolt; 19. Flange; 20. Positioning slot hole; 21. Fastening bolt; 22. Guide post fixing screw hole; 23. Die fixing hole; 24. Fixing bolt; 25. Elastic support sleeve; 26. Flat blank. Detailed Implementation

[0019] Figure 1 , 2 The upper mold plate 2, lower mold plate 3, and mold support columns 4 constitute the main frame structure of this device. The upper mold plate 2 and lower mold plate 3 are identical rectangular plates, placed parallel to each other vertically. The lower surface of the upper mold plate 2 has positioning holes 15 at each of its four corners, and the upper surface of the lower mold plate 3 has positioning screw holes 16 at each of its four corners. The lower ends of the four mold support columns 4 are threaded and connected to the positioning screw holes 16 at the four corners of the lower mold plate 3. The upper ends of the four mold support columns 4 are inserted into the positioning holes 15 at the four corners of the upper mold plate 2. The upper mold plate 2 above the positioning holes 15 has vertical bolt connection holes 17. The upper ends of the four mold support columns 4 have screw holes that correspond to the bolt connection holes 17 of the upper mold plate 2. The connecting bolts 18 are fixedly connected to the screw holes at the upper ends of the mold support columns 4 through the bolt connection holes 17.

[0020] Figure 1 , 3 The mold base has a circular hole 10 at the center of the template 2. A pressure cylinder 1 is vertically fixed to the upper surface of the template 2. The pressure piston rod 11 of the pressure cylinder 1 passes through the circular hole 10 of the template 2 and is connected to the upper part of the mold handle 5. The mold handle 5 is a cylindrical body with a threaded inner hole. The lower end of the pressure piston rod 11 of the pressure cylinder 1 has a thread that matches the thread of the inner hole of the mold handle 5. The inner hole of the mold handle 5 and the pressure piston rod 11 of the pressure cylinder 1 are connected by a thread. The lower end of the mold handle 5 is connected to the upper end of the punch 6 of the mold.

[0021] Figure 1 , 4The mold is placed in the cavity between the upper mold plate 2 and the lower mold plate 3 of the mold base. The mold includes a punch 6, a die 7, and mold guide pillars 8. The punch 6 and the die 7 are both flat rectangular parallelepiped structures, parallel to each other, located between the upper mold plate 2 and the lower mold plate 3 of the mold base. The upper surface of the die 7 has guide pillar fixing screw holes 22 at each of its four corners, and the lower ends of the four mold guide pillars 8 are threaded to connect with the guide pillar fixing screw holes 22 at the four corners of the upper surface of the die 7. The punch 6 has sliding guide holes 12 at each of its four corners, and the upper ends of the four mold guide pillars 8 pass through the sliding guide holes 12 at the four corners of the punch 6. The mold guide pillars 8 and the sliding guide holes 12 are in sliding fit, allowing the punch 6 to slide up and down along the mold guide pillars 8.

[0022] Figure 1 , 3 The upper end of the punch 6 is connected to the lower end of the die shank 5. An annular flange 19 is welded to the lower end of the die shank 5. A positioning slot 20 is located at the center of the upper surface of the punch 6, matching the flange 19 at the lower end of the die shank 5. The flange 19 at the lower end of the die shank 5 is embedded in the positioning slot 20 on the upper surface of the punch 6. Fastening bolts 21 securely connect the die shank 5 and the upper surface of the punch 6 through the flange holes. The pressure piston rod 11 of the pressure cylinder 1 can drive the die shank 5 to move up and down, which in turn drives the punch 6 to move up and down. The punch 6 and the die 7 press the flat blank 26.

[0023] Figure 1 , 2 As shown in Figure 4, the lower surface of the die 7 is fixedly connected to the upper surface of the lower template 3 of the mold frame. The die 7 has a vertical die fixing hole 23 at its center. The diameter of the die fixing hole 23 matches that of the fixing bolt 24. The upper end of the die fixing hole 23 has a large-diameter nut groove. The lower template 3 of the mold frame below the die fixing hole 23 has corresponding screw holes. The fixing bolt 24 is fixedly connected to the screw holes of the lower template 3 of the mold frame through the die fixing hole 23. The nut of the fixing bolt 24 is located in the nut groove at the upper end of the die fixing hole 23. The upper end face of the nut is lower than the upper surface of the die 7 and will not affect the flat blank 26 above the die 7.

[0024] Figure 1 , 3 As shown in Figure 4, each of the four mold guide pillars 8 is fitted with an elastic support sleeve 25. The lower end face of each of the four elastic support sleeves 25 contacts the upper surface of the die 7. The height of the elastic support sleeve 25 is less than the thickness of the flat blank 26. The function of the elastic support sleeve 25 is to isolate the punch 6 and the die 7, preventing damage caused by contact between the surface of the punch 6 and the surface of the die 7 when there is no flat blank 26. Since the height of the elastic support sleeve 25 is less than the thickness of the flat blank 26, it will not affect the pressing of the flat blank 26.

[0025] Figure 1 , 3The diagram shows that there are cooling water pipes inside the mold bodies of punch 6 and die 7. Cooling water inlets 13 and cooling water outlets 14 are respectively located on the side walls of punch 6 and die 7. A general-purpose water chiller 9 is placed outside the upper mold plate 2 and the lower mold plate 3 of the mold frame. The water supply pipe and return pipe of the general-purpose water chiller 9 are connected to the cooling water inlets 13 and cooling water outlets 14 on the side walls of punch and die, respectively, to input circulating cooling water into the cooling water pipes in punch 6 and die 7. The cooling water quenches the flat blank 26 between punch 6 and die 7 through the cooling water pipes in punch 6 and die 7.

[0026] The working process of this utility model is as follows:

[0027] First, the test device is installed and connected so that the pressure piston rod 11 of the pressure cylinder 1 passes through the round hole 10 of the template 2 on the mold frame and is connected to the mold handle 5. The punch 6 and the die 7 are connected by the mold guide post 8. The die 7 is connected and fixed to the lower template 3 of the mold frame by the fixing bolt 24, so that the center of the mold frame is aligned with the center of the mold, the mold is in the open state, and the punch 6 is in the uppermost position.

[0028] Secondly, process parameters such as the rapid pressing time, holding pressure, holding quenching time, and unloading return time of the punch 6 are set through the operation panel of the pressure cylinder 1.

[0029] Next, process parameters such as cooling water temperature and flow rate are set through the universal chiller 9 control panel;

[0030] Then, the flat blank 26 is heated to the test set temperature, and the flat blank 26 is quickly placed into the blank groove of the die 7 by hand;

[0031] Next, the processing is started through the operation panel of pressure cylinder 2, and the high-speed pressing, pressure holding quenching, unloading and other processes are completed automatically according to the settings.

[0032] Finally, the quenched test specimen was manually removed and air-cooled to complete a single test.

[0033] An embodiment of this utility model is as follows:

[0034] Pressure cylinder 1 is a pneumatic-hydraulic booster cylinder, with a cylinder diameter of 80mm, a tonnage of 5T, and a pneumatic pressure of 6kg / cm². 2 Total stroke 300mm;

[0035] The upper template 2 and the lower template 3 of the mold frame are 600mm long, 600mm wide, and 40mm thick;

[0036] The diameter of the formwork support 4 is 38mm and the height is 330mm;

[0037] The diameter of the mold shank 5 is 30mm and the height is 45mm;

[0038] The punch 6 and die 7 are 400mm long and 300mm wide, with a closed height of 168mm and a maximum open height of 195mm. They are each equipped with 7 cooling channels with a diameter of 8mm, which are evenly distributed along the length of the blank groove.

[0039] The mold guide pillar 8 has a diameter of 20mm and a height of 260mm;

[0040] The general-purpose water chiller model 9 has a cooling capacity of 8514 kcal / h, a total input power of 2.7 kW, and a water flow rate of 2 m³ / h. 3 / h, water tank capacity 70L;

[0041] The flat blank 26 is made of 22MnB5 thermoforming material, with a length of 300mm, a width of 300mm, and a thickness of 2mm. The heat treatment temperature is 930℃, the high-speed pressing time of the punch is 2S, the holding pressure is 1.5 tons, the holding time is 20S, the mold cooling time is 20S, the cooling water temperature is 20℃, the cooling water flow rate is 0.7m / s, and after six consecutive processing cycles, the mold temperature is 57-110℃, and the martensite content of the blank is at least 96%.

Claims

1. A water-cooled stamping and quenching test device for flat plate molds, characterized in that: It includes a pressure cylinder (1), an upper mold plate (2), a lower mold plate (3), mold support pillars (4), a mold handle (5), a punch (6), a die (7), mold guide pillars (8), and a general-purpose water chiller (9). The upper mold plate (2) and the lower mold plate (3) are identical rectangular plates. The upper mold plate (2) and the lower mold plate (3) are placed parallel to each other vertically. The upper and lower ends of the four mold support pillars (4) are respectively aligned with the lower surface of the upper mold plate (2) and the lower mold plate (3). The four corners of the upper surface of the template (3) are fixedly connected. The center of the template (2) on the mold frame has a round hole (10). The pressure cylinder (1) is vertically fixed on the upper surface of the template (2) on the mold frame. The pressure piston rod (11) of the pressure cylinder (1) passes through the round hole (10) of the template (2) on the mold frame and is connected to the upper part of the mold handle (5). The punch (6) and the die (7) are respectively flat rectangular structures. The punch (6) and the die (7) are parallel to each other and located on the template (2) on the mold frame. Between the die and the lower template (3), the lower surface of the die (7) is fixedly connected to the upper surface of the lower template (3), the lower ends of the four mold guide pillars (8) are fixedly connected to the four corners of the upper surface of the die (7), the four corners of the punch (6) have sliding guide holes (12), the upper ends of the four mold guide pillars (8) pass through the sliding guide holes (12) at the four corners of the punch (6), the mold guide pillars (8) and the sliding guide holes (12) are in sliding fit, and the lower part of the mold handle (5) is connected to the punch (6). The upper surface is fixedly connected. The punch (6) and the die (7) have cooling water pipes inside. The side walls of the punch (6) and the die (7) have cooling water inlet (13) and cooling water outlet (14) respectively. The general-purpose water chiller (9) is placed on the outside of the upper template (2) and the lower template (3) of the mold frame. The water supply pipe and return pipe of the general-purpose water chiller (9) are connected to the cooling water inlet (13) and cooling water outlet (14) on the side walls of the punch (6) and the die (7) respectively.

2. The flat plate mold water-cooled stamping and quenching test device according to claim 1, characterized in that: The upper template (2) of the mold frame has positioning holes (15) at the four corners of its lower surface, and the lower template (3) of the mold frame has positioning screw holes (16) at the four corners of its upper surface. The lower ends of the four mold frame supports (4) are threaded and connected to the positioning screw holes (16) at the four corners of the lower template (3). The upper ends of the four mold frame supports (4) are inserted into the positioning holes (15) at the four corners of the upper template (2). The upper template (2) of the mold frame above the positioning holes (15) has vertical bolt connection holes (17). The upper end of the four mold frame supports (4) has screw holes that are opposite to the bolt connection holes (17) of the upper template (2). The connecting bolts (18) are fixedly connected to the screw holes at the upper end of the mold frame supports (4) through the bolt connection holes (17).

3. The flat plate mold water-cooled stamping and quenching test device according to claim 1, characterized in that: The mold handle (5) is a cylindrical body. The inner hole of the cylindrical body of the mold handle (5) has threads. The lower end of the pressure piston rod (11) of the pressure cylinder (1) has threads that match the inner hole threads of the mold handle (5). The inner hole of the mold handle (5) and the lower end of the pressure piston rod (11) of the pressure cylinder (1) are connected by threads. The lower end of the mold handle (5) is welded with an annular flange (19). The upper surface of the punch (6) has a positioning slot (20) at the center. The positioning slot (20) matches the flange (19) at the lower end of the mold handle (5). The flange (19) at the lower end of the mold handle (5) is embedded in the positioning slot (20) on the upper surface of the punch (6). The fastening bolt (21) fixes the mold handle (5) and the upper surface of the punch (6) through the flange hole.

4. The flat plate mold water-cooled stamping and quenching test device according to claim 1, characterized in that: The upper surface of the die (7) has guide post fixing screw holes (22) at the four corners. The lower ends of the four mold guide posts (8) are threaded and connected to the guide post fixing screw holes (22) at the four corners of the upper surface of the die (7). The center of the die (7) has a vertical die fixing hole (23). The diameter of the die fixing hole (23) matches the fixing bolt (24). The upper end of the die fixing hole (23) has a large diameter nut groove. The lower mold template (3) below the die fixing hole (23) has corresponding screw holes. The fixing bolt (24) is fixedly connected to the screw hole of the lower mold template (3) through the die fixing hole (23). The nut of the fixing bolt (24) is located in the nut groove at the upper end of the die fixing hole (23). The upper end face of the nut is lower than the upper surface of the die (7).

5. The flat plate mold water-cooled stamping and quenching test device according to claim 4, characterized in that: The four mold guide pillars (8) are respectively fitted with elastic support sleeves (25). The lower end face of the four elastic support sleeves (25) is in contact with the upper surface of the die (7), and the upper end face of the four elastic support sleeves (25) is opposite to the lower surface of the punch (6). The height of the elastic support sleeve (25) is less than the thickness of the flat blank (26).

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