Ultralow-temperature plate forming device

Abstract

The utility model relates to the field of plate metal part forming, in particular to an ultralow-temperature plate forming device. The upper top plate and the lower bottom plate which are oppositely arranged in parallel up and down are connected through a guide column, and the pressure sliding plate penetrates through the guide column and is in sliding fit with the guide column; a plate is installed between the female die and the blank holder which are vertically opposite, the female die and the blank holder are mechanically connected and are in clamping fit with a groove in the bottom of the female die base through a boss on the top of the female die, and the refrigerator and the thermal resistor are installed in reserved holes of the female die base respectively. The female die base is installed at the bottom of the female die base cushion plate which is installed at the bottom of the pressure sliding plate, and the force transmission base is installed at the top of the pressure sliding plate. The male die is installed on the top of the male die base, the male die base is fixed to the lower bottom plate through bolts, and the upper portion of the male die corresponds to a plate and the female die. The device is small in size, simple in structure, convenient to assemble and disassemble, high in production efficiency, energy-saving and low in cost, and can be extensively applied to the fields of universal testing machines, thermal simulation testing machines or other press machines and the like.

Description

Technical Field

[0001] The utility model relates to the field of forming plate-type metal parts, in particular to an ultra-low temperature plate forming device. Background Art

[0002] Metal plate parts are one of the most common parts in industry, and most of them are formed by room temperature or high temperature stamping deformation. However, for some sheet forming parts with poor room temperature plastic processing ability, sensitive to high temperature deformation, or with special process requirements, ultra-low temperature forming (i.e. plastic processing in an environment below -100°C) has gradually become a research hotspot. The research results of cryogenic technology in recent years have shown that some metal materials can simultaneously improve the elongation and work hardening index in ultra-low temperature environments, and obtain parts with both excellent strength and elongation deformation. In addition, the forming of materials in a low temperature environment also avoids the influence of traditional high temperature processing on the material structure (abnormal grain growth or phase change).

[0003] The principle of existing cryogenic plate forming devices is that the plate material is immersed in a liquid nitrogen environment for forming. Such devices are not only large in size and consume a lot of liquid nitrogen, but also require a special mechanical structure and a complex insulation structure, resulting in low production efficiency and high cost. Utility Model Content

[0004] In view of the above-mentioned and existing problems, the technical problem to be solved by the utility model is to provide an ultra-low temperature sheet forming device, which can be generally used in universal testing machines, thermal simulation testing machines or other presses, and combines high-pressure gas cylinders and refrigerators to replace the traditional method of requiring a large amount of liquid nitrogen and other refrigerants to achieve a low-temperature environment for the sheet, thereby achieving ultra-low temperature forming of the sheet in an efficient and energy-saving manner.

[0005] The technical solution of this utility model:

[0006] A super-low temperature sheet forming device, wherein an upper top plate and a lower bottom plate which are arranged relatively parallel to each other are connected by guide pillars, a pressure slide plate passes through the guide pillars and is slidably matched with the guide pillars; the sheet material is installed between a die and a blank holder which are relatively opposite to each other, the die and the blank holder are mechanically connected and clamped with the groove at the bottom of a die seat through a boss at the top of the die, a refrigerator and a thermal resistor are installed in respective holes reserved in the die seat; the die seat is installed at the bottom of a die seat pad, the die seat pad is installed at the bottom of the pressure slide plate, and a force transmission seat is installed at the top of the pressure slide plate; the punch is installed at the top of the punch seat, the punch seat is fixed to the lower bottom plate by bolts, and the upper part of the punch corresponds to the sheet material and the die; a sealed cabin is installed around the upper top plate and the lower bottom plate, a heat preservation plate is fitted with the inner wall of the sealed cabin, a sealed cabin door is provided on one side of the sealed cabin, and the sealed cabin door cooperates with the sealed cabin.

[0007] In the ultra-low temperature sheet forming device, the two ends of the pipeline system are respectively installed at the input end of the refrigerator and the output end of the high-pressure gas cylinder, and the high-pressure gas output flow rate of the high-pressure gas cylinder is controlled by the operating table. The high-pressure gas cylinder is used to input high-pressure gas into the refrigerator, which is converted into liquid spray and sprayed onto the surface of the blank for cooling. The temperature of the sheet is controlled by controlling the high-pressure gas output flow rate.

[0008] The ultra-low temperature sheet forming device has three or more refrigerators evenly distributed around the die seat.

[0009] In the ultra-low temperature sheet forming device, the movable concave die is pressed down to the fixed convex die, so that the liquid refrigerant spray sprayed by the refrigerator remains on the surface of the blank for a long time.

[0010] The ultra-low temperature sheet forming device has a magnetic top on the force transmission seat, and is fixed to the pressure machine by magnetic attraction or fastening bolts.

[0011] When the ultra-low temperature sheet forming device is fixed by fastening bolts, the fastening bolts are installed in the bolt holes on the force transmission seat, and the force transmission seat is fixed to the pressure machine by the fastening bolts.

[0012] A method for forming an ultra-low temperature sheet material using the device comprises the following steps:

[0013] S1. Design the shape and size of the die and punch according to the target parts, and calculate the blanking size of the sheet;

[0014] S2. Fix the lower base plate and the force transmission seat of the ultra-low temperature sheet forming device on the pressure machine respectively;

[0015] S3, fix the sheet between the die and the blank holder, and then screw the die into the die seat and clamp it;

[0016] S4. Adjust the distance between the concave die and the convex die according to the shape and size of the sheet;

[0017] S5. Close the sealed hatch;

[0018] S6. Open the valve of the high-pressure gas cylinder, and the high-pressure gas is output from the high-pressure gas cylinder to the refrigerator to form a liquid refrigerant spray, which is sprayed onto the surface of the plate to cool the plate to a predetermined temperature;

[0019] S7, forming: by operating the pressure machine, the die moves linearly downward, and the ultra-low temperature plate forming process of the sheet material is realized through the joint action of the die and the punch;

[0020] S8. After forming is completed, close the high-pressure gas cylinder valve, open the sealed cabin door, and take out the target parts.

[0021] The design idea of ​​the utility model is:

[0022] The principle of the existing ultra-low temperature plate forming devices is mostly: a large amount of liquid nitrogen is introduced into the forming tool to cool it down before the forming process is carried out. This type of device is not only large in size and consumes a lot of liquid nitrogen, but also requires a special mechanical structure and a complex insulation structure, with low production efficiency and high cost. Therefore, the utility model proposes a small universal device to solve the problem of ultra-low temperature plate forming, which uses a refrigerator to spray liquid refrigerant spray instead of a large amount of liquid nitrogen immersion, and can be installed in conjunction with a general pressure machine, which can be integrated with the original pressure machine to save space and facilitate assembly, and there is no need to change the original function of the pressure machine.

[0023] The advantages and beneficial effects of the utility model are:

[0024] 1. The utility model has the advantages of small size, energy saving, low cost and high production efficiency;

[0025] 2. The utility model has a simple structure and is easy to load and unload;

[0026] 3. The utility model does not require a special pressure mechanical structure and a complex supporting system, has strong versatility and a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following briefly introduces the drawings required for the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0028] Figure 1 It is the general assembly diagram of the ultra-low temperature sheet forming device of the embodiment.

[0029] Figure 2-Figure 3 They are respectively a top sectional view and a half sectional view of the forming structure of the ultra-low temperature sheet forming device of the embodiment.

[0030] Figure 4 Schematic diagram of the ultra-low temperature sheet forming device of the embodiment installed on a universal testing machine.

[0031] Figure 5 Schematic diagram of the ultra-low temperature sheet forming device of the embodiment installed on a hydraulic press.

[0032] In the figure, 1, sheet; 2, blank holder; 3, die; 4, die seat; 5, refrigerator; 6, thermal resistor; 7, force transmission seat; 8, pressure slide plate; 9, fastening bolts; 10, guide column; 11, punch; 12, punch seat; 13, bolts; 14, sealed cabin; 15, insulation board; 16, sealed cabin door; 17, piping system; 18, operating table; 19, high-pressure gas cylinder; 20, lower bottom plate; 21, upper top plate; 22, die seat pad; 23, universal testing machine; 24, hydraulic press; 25, moving beam of universal testing machine; 26, working table of universal testing machine; 27, punch of universal testing machine; 28, moving beam of hydraulic press; 29, working table of hydraulic press. DETAILED DESCRIPTION

[0033] like Figure 1 , Figure 2 , Figure 3As shown, the utility model proposes an ultra-low temperature sheet forming device, which includes: a sheet 1, a blank holder 2, a die 3, a die seat 4, a refrigerator 5, a thermal resistor 6, a force transmission seat 7, a pressure slide 8, a fastening bolt 9, a guide column 10, a punch 11, a punch seat 12, a bolt 13, a sealed cabin 14, an insulation board 15, a sealed cabin door 16, a pipeline system 17, an operating table 18, a high-pressure gas cylinder 19, a lower bottom plate 20, an upper top plate 21, and a die seat pad 22. The structure is as follows: the upper top plate 21 and the lower bottom plate are arranged parallel to each other. 20 are connected by four guide pillars 10, and the pressure slide plate 8 passes through the guide pillars 10 and is in sliding cooperation with the guide pillars 10; the sheet 1 is installed between the upper and lower opposite die 3 and the blank holder 2, the die 3 is mechanically connected to the blank holder 2 and is clamped and matched with the bottom groove of the die seat 4 through the top boss of the die 3, three refrigerators 5 and thermal resistors 6 are installed in the respective holes reserved in the die seat 4, and the three refrigerators 5 are evenly distributed around the die seat 4; if higher cooling efficiency is required, more refrigerators 5 can be arranged evenly distributed around the die seat 4. The die seat 4 is installed at the bottom of the die seat pad 22, and the die seat pad 22 is installed at the bottom of the pressure slide plate 8, and the force transmission seat 7 is installed at the top of the pressure slide plate 8. The top of the force transmission seat 7 is magnetic, and can be fixed to the pressure machine by magnetic attraction or fastening bolts; when fixed by fastening bolts, the fastening bolts 9 are installed in the bolt holes on the force transmission seat 7, and the force transmission seat 7 is fixed to the pressure machine by fastening bolts 9. The punch 11 is installed on the top of the punch seat 12, and the punch seat 12 is fixed to the lower base plate 20 by bolts 13. The top of the punch 11 corresponds to the sheet 1 and the die 3. The sealed cabin 14 is installed on the upper top plate 21 and the lower base plate 20 in the circumference, and the insulation board 15 is in contact with the inner wall of the sealed cabin 14. A sealed cabin door 16 is provided on one side of the sealed cabin 14, and the sealed cabin door 16 cooperates with the sealed cabin 14. The two ends of the pipeline system 17 are respectively installed at the input end of the refrigerator 5 and the output end of the high-pressure gas cylinder 19, and the high-pressure gas output flow of the high-pressure gas cylinder 19 is controlled by the operating table 18, which further plays a role in controlling the temperature of the sheet. The motion feature of the ultra-low temperature sheet forming device is that the movable die 3 is pressed down to the fixed punch 11, so that the liquid refrigerant spray sprayed by the refrigerator 5 can remain on the surface of the blank for a long time.

[0034] In the specific implementation process, the ultra-low temperature sheet forming device is first installed on a universal testing machine, a thermal simulation testing machine or other press. After the fixation is completed, the distance between the die and the punch is adjusted to a suitable position. The blank is placed between the die and the blank holder, and screwed with screws, and then the die is screwed into the die seat and clamped. Subsequently, the sealed cabin door is closed, and the valve of the high-pressure gas cylinder that can control the gas flow is opened. The high-pressure gas is converted into a liquid refrigerant through the pipeline system and the refrigerator and sprayed onto the surface of the sheet to achieve cooling of the sheet. At the same time, the surface temperature of the blank can be monitored in real time by a thermal resistor. Finally, after the sheet is kept at a predetermined temperature for a period of time, the pressure system is operated to press down to the specified position to complete the ultra-low temperature forming of the plate metal parts, and the gas circuit, circuit, hydraulic pressure and system are closed.

[0035] The following will clearly and completely describe the technical solutions of the embodiments in this application in conjunction with the embodiment drawings in the application specification. Obviously, the described embodiments are only part of the embodiments in this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0036] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments. Example 1

[0037] like Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, this embodiment is a method for forming an ultra-low temperature sheet (an ultra-low temperature sheet forming device is installed on a universal testing machine 23), comprising:

[0038] S1. Design the shape and size of the concave die 3 and the convex die 11 according to the target part, and calculate the blanking size of the sheet material 1;

[0039] S2, fix the lower base plate 20 and the force transmission seat 7 on the universal testing machine 23 respectively;

[0040] S3, install the sheet 1 between the die 3 and the blank holder 2 and fix it, screw it into the die seat 4 and clamp it;

[0041] S4, adjusting the distance between the concave die 3 and the convex die 11 according to the shape and size of the sheet material 1;

[0042] S5, closing the sealed hatch 16;

[0043] S6, the operating console 18 controls to open the valve of the high-pressure gas cylinder 19, inputs high-pressure gas to the refrigerator 5 through the high-pressure gas cylinder 19 and outputs liquid refrigerant spray, cooling the temperature to -150°C;

[0044] S7, forming: by operating the universal testing machine 23, the force transmission seat 7 drives the pressure slide plate 8 and the die 3 to make a downward linear motion, and the die 3 and the punch 11 work together to achieve the ultra-low temperature plate forming process of the sheet material 1;

[0045] S8. After forming is completed, close the valve of the high-pressure gas cylinder 19, open the sealed cabin door 16, and take out the target part.

[0046] In a specific embodiment, Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, the ultra-low temperature sheet forming device is installed on the universal testing machine 23. By adjusting the distance of the universal testing machine moving crossbeam 25, the lower base plate 20 is fixed on the universal testing machine workbench 26, and the universal testing machine punch 27 is mechanically matched with the force transmission seat 7 through the fastening bolts 9, the sheet 1 is installed and fixed between the die 3 and the blank holder 2, screwed into the die seat 4 and clamped, the sealed cabin door 16 is closed, and the valve of the operating table 18 is opened to input high-pressure gas to the refrigerator 5 and output liquid refrigerant spray. After the thermal resistance shows that the temperature drops to -150℃ and keeps warm for 5 minutes, the universal testing machine 23 is operated to perform the stamping action. After reaching the pressing position, the machine is stopped, the sealed cabin door 16 is opened, and the formed parts are taken out. Example 2

[0047] like Figure 1 , Figure 2 , Figure 3 , Figure 5 As shown, this embodiment provides a method for forming an ultra-low temperature sheet (an ultra-low temperature sheet forming device is installed on a hydraulic press 24), comprising:

[0048] S1. Design the shape and size of the concave die 3 and the convex die 11 according to the target part, and calculate the blanking size of the sheet material 1;

[0049] S2, fix the lower base plate 20 and the force transmission seat 7 on the hydraulic press 24 respectively;

[0050] S3, install the sheet 1 between the die 3 and the blank holder 2 and fix it, screw it into the die seat 4 and clamp it;

[0051] S4, adjusting the distance between the concave die 3 and the convex die 11 according to the shape and size of the sheet material 1;

[0052] S5, closing the sealed hatch 16;

[0053] S6, the operating console 18 controls to open the valve of the high-pressure gas cylinder 19, inputs high-pressure gas to the refrigerator 5 through the high-pressure gas cylinder 19 and outputs liquid refrigerant spray, cooling the temperature to -150°C;

[0054] S7, forming: by operating the hydraulic press 24, the force transmission seat 7 drives the pressure slide plate 8 and the die 3 to move linearly downward, and the die 3 and the punch 11 work together to achieve the ultra-low temperature plate forming process of the sheet material 1;

[0055] S8. After forming is completed, close the valve of the high-pressure gas cylinder 19, open the sealed cabin door 16, and take out the target part.

[0056] In a specific embodiment, Figure 1 , Figure 2 , Figure 3 , Figure 5 As shown, the ultra-low temperature sheet forming device is installed on the hydraulic press 24. By adjusting the distance of the hydraulic press moving crossbeam 28, the lower base plate 20 is fixed on the hydraulic press workbench 29, and the hydraulic press moving crossbeam 28 is magnetically matched through the force transmission seat 7, and the sheet 1 is installed and fixed between the die 3 and the pressure ring 2, and then screwed into the die seat 4 to clamp it, and the sealed cabin door 16 is closed, and the valve of the operating table 18 is opened to input high-pressure gas to the refrigerator 5 and output liquid refrigerant spray. After the thermal resistance shows that the temperature drops to -150℃ and keeps warm for 5 minutes, the hydraulic press 24 is operated to perform the stamping action. After reaching the pressing position, the machine is stopped, the sealed cabin door 16 is opened, and the formed parts are taken out.

[0057] The embodiments show that the device of the utility model has small size, simple structure, easy assembly and disassembly, high production efficiency, energy saving, low cost, strong versatility, and has a very broad industrialization prospect. In addition, it can be extended to the fields of universal testing machines, thermal simulation testing machines or other presses.

[0058] It should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. An ultra-low temperature sheet forming device, characterized in that: The upper top plate and the lower bottom plate which are arranged relatively parallel to each other are connected by guide pillars, and the pressure slide plate passes through the guide pillars and is slidably matched with the guide pillars; the sheet material is installed between the upper and lower opposite die and the blank holder, the die and the blank holder are mechanically connected and clamped with the groove at the bottom of the die seat through the boss on the top of the die, and the refrigerator and the thermal resistor are installed in the respective holes reserved in the die seat; the die seat is installed at the bottom of the die seat pad, the die seat pad is installed at the bottom of the pressure slide plate, and the force transmission seat is installed at the top of the pressure slide plate; the punch is installed at the top of the punch seat, and the punch seat is fixed to the lower bottom plate by bolts, and the top of the punch corresponds to the sheet material and the die; the sealed cabin is installed on the circumference of the upper top plate and the lower bottom plate, the insulation plate is fitted with the inner wall of the sealed cabin, and a sealed cabin door is provided on one side of the sealed cabin, and the sealed cabin door cooperates with the sealed cabin.

2. The ultra-low temperature sheet forming device according to claim 1, characterized in that: The two ends of the pipeline system are respectively installed at the input end of the refrigerator and the output end of the high-pressure gas cylinder, and the high-pressure gas output flow of the high-pressure gas cylinder is controlled through the operating table. The high-pressure gas is input into the refrigerator by the high-pressure gas cylinder, and converted into liquid spray and sprayed onto the surface of the blank for cooling. The temperature of the plate is controlled by controlling the high-pressure gas output flow.

3. The ultra-low temperature sheet forming device according to claim 1, characterized in that: There are more than three coolers evenly distributed around the circumference of the die seat.

4. The ultra-low temperature sheet forming device according to claim 1, characterized in that: The movable concave die is pressed down onto the fixed convex die, so that the liquid refrigerant spray sprayed by the refrigerator remains on the surface of the blank for a long time.

5. The ultra-low temperature sheet forming device according to claim 1, characterized in that: The top of the force transmission seat is magnetic and can be fixed to the pressure machinery by magnetic attraction or fastening bolts.

6. The ultra-low temperature sheet forming device according to claim 5, characterized in that: When fixing by fastening bolts, the fastening bolts are installed in the bolt holes on the force transmission seat, and the force transmission seat is fixed to the pressure machine by the fastening bolts.

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