Punching and chambering equipment for metal plate

Abstract

The utility model discloses punching and chambering equipment for a metal plate, belongs to the technical field of forming performance and test of the metal plate, and solves the problems of inaccurate punching and chambering test result and incapability of meeting electrification in the prior art. The upper die unit comprises an upper die plate, a supporting frame and a connecting rod assembled between the upper die plate and the supporting frame, a fixing piece is connected to the supporting frame, a pressing piece is connected to the fixing piece, the lower die unit comprises a lower die plate and a blank holder located above the lower die plate, a through hole is formed in the blank holder, a hole punching and reaming assembly is connected to the lower die plate, and the lower die plate is connected with the supporting frame. The metal plate is placed on the blank holder, the upper die unit moves downwards to drive the blank holder and the metal plate to move downwards, the punching and chambering assembly penetrates through the metal to achieve punching and chambering operation, and the punching and chambering equipment sequentially conducts punching and chambering operation, so that the problem that the accuracy of a test result is reduced due to secondary positioning of the metal plate is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of metal sheet forming performance and test technology, in particular to a metal sheet punching and expanding hole equipment, especially a compound punching and expanding hole equipment for electrifiable metal sheet. BACKGROUND

[0002] The hole expanding test is an important test in sheet forming performance testing, and its purpose is to evaluate the flanging formability of metal sheet by pressing the test piece with a central hole into a concave die with a convex die until the necking or cracking appears at the edge of the plate hole. Since flanging is a typical deformation mode, the development of hole expanding test is crucial for predicting and optimizing related processes.

[0003] During the test operation of sheet performance testing, punching and expanding hole are two key steps in the study of metal sheet forming performance, and are widely used in material forming manufacturing in the fields of automobiles, aerospace, etc. The traditional punching and expanding hole process usually needs to be carried out respectively, that is, a hole is punched on the sheet using a punching equipment first, and then the hole is expanded using an expanding hole test equipment. This step-by-step method has some problems: first, the sheet needs to be positioned twice, which increases the operation difficulty and time, and reduces the production efficiency; second, the punching and expanding hole equipment usually needs to be configured separately, which increases the equipment cost and occupied space. In addition, the electrification performance of the material is often limited during the punching and expanding hole process, which cannot meet some special process requirements, such as electrifying or heating the material during punching and expanding hole to change its performance.

[0004] The utility model aims at providing a metal sheet punching and expanding hole equipment, which can perform punching and expanding hole operations without positioning the metal sheet twice, ensuring the accuracy of positioning, facilitating the judgment of the performance of the metal sheet, and providing important data support for metal sheet performance testing, defect prediction and process optimization, thus having significant practical application value. SUMMARY

[0005] This part aims to summarize some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this part and the abstract of the specification and the utility model name to avoid obscuring the purpose of this part, the abstract of the specification and the utility model name, and such simplifications or omissions cannot be used to limit the scope of the utility model.

[0006] To solve the above problems, the utility model adopts the following technical solutions.

[0007] The utility model provides a metal sheet punching and expanding hole equipment in one aspect, which is as follows.

[0008] A metal plate punching and expanding hole device, comprising an upper die unit and a lower die unit, the upper die unit comprises an upper die plate, a support frame and a connecting rod assembled between the upper die plate and the support frame, the support frame is connected with a fixing part, the fixing part is connected with a pressing part, the lower die unit comprises a lower die plate and a pressure ring above the lower die plate, the pressure ring is provided with a through hole, and the lower die plate is connected with a punching and expanding hole assembly, the metal plate is placed on the pressure ring, the upper die unit moves downward to drive the pressure ring and the metal plate to move downward, and the punching and expanding hole assembly realizes punching and expanding hole operation by penetrating the metal.

[0009] Preferably, in the metal plate punching and expanding hole device, a guide pin guide sleeve and an air spring are further installed between the pressure ring and the lower die plate, the guide pin guide sleeve is matched to stretch and contract to make the pressure ring move relative to the lower die plate when the pressure ring moves downward, and the air spring is matched to stretch and contract when the pressure ring moves relative to the lower die plate.

[0010] Preferably, in the metal plate punching and expanding hole device, the pressing part comprises a pressing disc and a connecting rod integrally formed with the pressing disc, and the pressing part is further provided with a gradient waste hole, the punching and expanding hole assembly penetrates the metal plate into the gradient waste hole to complete the punching operation on the metal plate during the punching operation.

[0011] Preferably, in the metal plate punching and expanding hole device, the upper part and the bottom part of the connecting rod are both provided with pin holes, when the pressing part is connected with the fixing part through the pin holes in the upper part of the connecting rod, the lower surface of the pressing disc is flush with the lower surface of the upper die plate, and when the pressing part is connected with the fixing part through the pin holes in the bottom part of the connecting rod, the lower surface of the pressing disc is above the upper surface of the upper die plate.

[0012] Preferably, in the metal plate punching and expanding hole device, the lower die plate is further fixedly connected with a bearing seat, one end of the bearing seat extends above the lower die plate, the other end extends below the lower die plate, and the punching and expanding hole assembly is connected at the top of the bearing seat, when the upper die unit moves downward to drive the pressure ring to move downward, the punching and expanding hole assembly penetrates the through hole to punch and expand the hole of the metal plate.

[0013] Preferably, in the metal plate punching and expanding hole device, the punching and expanding hole assembly comprises a punching part and an expanding hole part, the expanding hole part is in a conical structure, the expanding hole part is connected with the bearing seat, and the top of the expanding hole part is connected with the punching part, and the punching part penetrates the metal plate into the gradient waste hole of the pressing disc to complete the punching operation on the metal plate during the punching operation.

[0014] Preferably, in the metal plate punching and expanding hole device, the top of the fixing part is connected with an upper die base through an insulating connecting part, and the bottom of the bearing seat is connected with a lower die base through the insulating connecting part, and the insulating connecting part avoids the upper die base and the lower die base of the device from being electrified.

[0015] Preferably, the metal plate punching and expanding hole equipment, the support frame and the lower die plate are provided with through-thread holes, and the metal plate can be tested by current assistance through the power connection of the through-thread holes.

[0016] Compared with the prior art, the utility model has the advantages of:

[0017] (1) The punching and expanding hole equipment in the utility model positions the metal plate on the pressure ring during punching operation, then performs punching operation through the punching and expanding hole assembly, and continues to perform expanding operation after the punching operation is completed, thereby avoiding the problem of decreased accuracy of test results caused by the need for repositioning the metal plate during expanding operation after punching operation, and ensuring the accuracy of the test results of the metal plate, which provides important data support for performance evaluation of materials.

[0018] (2) The utility model can also test the metal plate by electrifying the metal plate and then performing punching and expanding operation, so as to obtain test results of the metal plate under the condition of current assistance, accurately judge the performance of the metal plate material, and provide important data support for performance testing, defect prediction and process optimization through analysis of the results, thereby having significant practical application value, and in addition, the punching and expanding hole equipment in the utility model is also provided with an insulating connecting piece to ensure the operation safety of the operator. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a structure schematic view of the metal plate punching and expanding hole equipment in the utility model;

[0020] Figure 2 It is a front view of Figure 1

[0021] Figure 3 It is a split structure schematic view of the upper die unit in the utility model;

[0022] Figure 4 It is a structure schematic view of the pressure piece in the utility model;

[0023] Figure 5 It is a sectional view of Figure 4

[0024] Figure 6 It is a structure schematic view of the lower die unit in the utility model;

[0025] Figure 7 It is a split structure schematic view of the lower die unit in the utility model;

[0026] Figure 8 It is a structure schematic view of the punching and expanding hole assembly in the utility model;

[0027] ​​Figure 9 The utility model discloses a structure diagram of the equipment of the metal plate punching and expanding hole operation.

[0028] The corresponding relationship between the reference signs and the component names in the drawings is as follows:

[0029] A, insulating connecting piece, B, power screw hole,

[0030] 100, upper die unit, 200, lower die unit,

[0031] 101, upper die plate, 102, connecting rod, 103, support frame, 104, upper die base, 105, pressing piece,

[0032] 103a, fixing piece, 105a, pressing disc, 105b, connecting rod, 105c, gradient waste hole,

[0033] 201, lower die plate, 202, edge ring, 203, guide pin guide sleeve, 204, air spring, 205, bearing seat, 206, lower die base, 207, fixed base, 208, punching and expanding hole assembly,

[0034] 208a, punching piece, 208b, expanding hole piece. DETAILED DESCRIPTION

[0035] In order to make the above-mentioned purpose, features and advantages of the utility model more apparent, easy to understand, the specific implementation of the utility model is explained in detail below in conjunction with the drawings of the specification.

[0036] In the following description, a lot of specific details are set forth in order to fully understand the utility model, but the utility model can also be implemented in other ways different from the description, and those skilled in the art can make similar generalization without violating the connotation of the utility model, therefore, the utility model is not limited by the specific embodiments disclosed below.

[0037] Secondly, the "one embodiment" or "embodiment" referred to here means that the specific features, structures or characteristics can be contained in at least one implementation of the utility model. In this specification, "in one embodiment" does not mean the same embodiment, nor is it an independent or selective embodiment that excludes other embodiments. The utility model provides the following embodiments.

[0038] As Figure 1 And Figure 2As shown, it is the structural schematic diagram of the metal plate punching and expanding hole equipment in the embodiment, the punching and expanding hole equipment in the embodiment is used for punching and expanding hole operation of the metal plate, avoids the problem of reducing precision caused by twice positioning of positioning when punching and positioning when expanding hole, the punching and expanding hole equipment in the embodiment, including the upper die unit 100 and the lower die unit 200, the upper die unit 100 is located above the lower die unit 200, when punching and expanding hole operation, the upper die unit 100 moves to the direction of the lower die unit 200, and the metal plate between the upper die unit 100 and the lower die unit 200 is punched and expanded.

[0039] As shown in the figure, Figures 1 to 3 The upper die unit 100 in the embodiment includes an upper die plate 101, the upper die plate 101 is provided with a fixed hole, and the upper surface of the upper die plate 101 is fixedly connected with a connecting rod 102, the top of the connecting rod 102 is fixedly installed with a support frame 103, in the embodiment, the support frame 103 is installed with a fixing piece 103a, the fixing piece 103a is collinear with the axis of the fixed hole, in the embodiment, the top of the fixing piece 103a is detachably connected with an insulating piece A through a pin shaft, the top of the insulating piece A is connected with an upper die base 104 through a pin shaft, in the embodiment, the upper die base 104 is connected with the power unit outside, the power unit can drive the upper die unit 100 to move downward, close to the lower die unit 200, and the upper die unit 100 and the lower die unit 200 can cooperate to punch and expand hole operation of the metal plate.

[0040] As shown in the figure, Figures 3 to 5 The top of the fixing piece 103a in the embodiment extends to the top of the support frame 103, and the bottom of the fixing piece 103a extends to the bottom of the support frame 103, in the embodiment, the bottom of the fixing piece 103a is connected with a pressing piece 105 through a pin shaft, the axis of the pressing piece 105 is collinear with the axis of the fixed hole on the upper die plate 101.

[0041] As shown in the figure, Figure 4 And Figure 5 The pressing piece 105 in the embodiment includes a pressing disc 105a and a connecting rod 105b assembled on the pressing disc 105a, as shown in the figure, Figure 5As shown, the connecting rod 105b in the embodiment is in an integral structure with the pressing disc 105a, and the pressing member 105 is provided with a gradient waste hole 105c which is communicated with the lower surface of the pressing disc 105a. In the embodiment, the connecting rod 105b is provided with pin holes, and the pin holes are provided with two groups. In addition, the lower end of the fixing member 103a is also provided with pin holes. During the punching operation, the pressing member 105 is installed on the fixing member 103a through the cooperation of the pin holes and the guide pins on the upper portion of the connecting rod 105b. At this time, the lower surface of the pressing disc 105a in the pressing member 105 is flush with the lower surface of the upper die plate 101. The pressing member 105 can be dismounted from the fixing member 103a by removing the guide pins, and the pressing member 105 is moved upward. The pin holes on the lower portion of the connecting rod 105b and the pin holes on the fixing member 103a are fixed by guide wires, so that the pressing member 105 is fixed on the fixing member 103a. At this time, the lower surface of the pressing disc 105a is higher than the upper surface of the upper die plate 101.

[0042] As shown in Figure 6 and Figure 7 As shown, it is a structure schematic view of the lower die unit 200 in the embodiment. The lower die unit 200 in the embodiment comprises a lower die plate 201, and the upper portion of the lower die plate 201 is provided with a pressure ring 202. In the embodiment, the pressure ring 202 and the lower die plate 201 are connected through a guide pin guide sleeve 203. When the pressure ring 202 moves downward, the guide pin guide sleeve 203 is stretched and contracted to cooperate with the formation of the pressure ring 202. In addition, in the embodiment, the pressure ring 202 and the lower die plate 201 are also assembled with an air spring 204. When the pressure ring 202 moves downward, the air spring 204 is contracted. When the acting force on the pressure ring 202 is removed, the air spring 204 resets to drive the pressure ring 202 to move upward.

[0043] As shown in Figure 6 and Figure 7As shown, in the embodiment, the lower die unit 200 further comprises a fixing seat 207 mounted on the lower surface of the lower die plate 201 to ensure the stability of the lower die unit 200, in addition, the lower die plate 201 is coaxially mounted with a bearing seat 205, the top of the bearing seat 205 extends above the lower die plate 201, and the lower end of the bearing seat 205 extends below the lower die plate 201, in the embodiment, the bearing seat 205 is connected with an insulating piece A through a pin shaft, the end of the insulating piece A is connected with a lower die base 206 through a pin shaft, in addition, in the embodiment, the top of the bearing seat 205 is further connected with a hole expansion assembly 208, a through hole is formed in the center of the edge ring 202, when the punching operation of the metal plate is needed, the metal plate is placed on the edge ring 202, the power unit on the outside drives the upper die unit 100 to move downward and press on the surface of the metal plate, at the same time, the edge ring 202 moves downward under the cooperation of the guide pin guide sleeve 203 and the air spring 204, the hole expansion assembly 208 passes through the through hole on the edge ring and presses on the lower surface of the metal plate, the upper die unit 100 continues to move downward, the top of the hole expansion assembly 208 passes through the metal plate and enters the gradient waste hole 105c in the pressing piece 105, thereby completing the hole expansion operation of the metal plate.

[0044] As Figure 8 shown, it is a structure diagram of the hole expansion assembly 208 in the embodiment, the hole expansion assembly 208 in the embodiment comprises a hole expansion piece 208b and a punching piece 208a located at the top of the hole expansion piece 208b, when the punching operation is needed, the punching piece 208a passes through the metal plate and enters the gradient waste hole 105c to complete the punching operation, when the hole expansion operation is needed, the hole expansion piece 208b enters the punch hole to expand the inner diameter of the punch hole to complete the hole expansion operation, the hole expansion piece 208b in the embodiment is a conical structure, the hole expansion is completed through the conical structure, the process is as Figure 9 shown, and in the embodiment, the metal plate only needs to be positioned on the edge ring 202 once to complete the punching and hole expansion operation, without the problem of precision decline caused by secondary positioning, ensuring the accuracy of the test results.

[0045] The embodiment provides the technical scheme of the metal plate hole expansion device as above, and the hole expansion method of the device is also provided, which is as follows.

[0046] First, the metal plate is placed on the surface of the edge ring 202 in the lower die unit 200, the power unit on the outside drives the upper die unit 100 to move downward, the upper die plate 101 and the pressing piece 105 in the upper die unit 100 press on the surface of the metal plate, the upper die unit 100 continues to move downward due to the action of the power unit, at this time the edge ring 202 in the lower die unit 200 continues to move downward, the punching piece 208a in the hole expansion assembly 208 passes through the through hole of the edge ring 202 to perform punching work on the metal plate.

[0047] When the hole expansion test is needed, the pressing piece 105 is disassembled by the pin shaft and then pulled upward, and then fixed by the guide pin through the pin hole below the connecting rod 105b in the pressing piece 105 and the pin hole on the fixing piece 103a, so that the pressing piece 105 is away from the upper die plate 101, and then the upper die unit 100 is continuously driven downward by the power unit, so that the tapered hole expansion piece 208b in the hole expansion assembly 208 continues to enter the punch hole to expand the inner diameter of the punch hole, and the upper die unit 100 is stopped before the metal plate is about to break, and the crack on the surface of the metal plate is observed, so that the test result is obtained to judge the performance of the metal plate.

[0048] By the above-mentioned way, only one positioning of the metal plate on the edge ring 202 is needed, then punching work is performed, and then hole expansion work is performed to complete the required test process and obtain the corresponding test result. The punching and hole expansion method in the embodiment is one positioning, and then punching and hole expansion work is performed in sequence, which avoids the need for repositioning when the next unit hole expansion work is performed after punching work, avoids the problem of inaccurate positioning caused by repositioning, and thus causes inaccurate test results. The above-mentioned way can ensure the accuracy of the test results.

[0049] In addition, as shown in Figure 1 The support frame 103 and the lower die plate 201 in the embodiment are provided with through-thread holes B, and the connection of the through-thread holes B can make the metal plate realize power-on for testing, so that the operating personnel can obtain the material performance of the metal plate when punching and hole expansion under the condition of current assistance. In addition, the existence of the insulating connecting piece A avoids the power-on of the upper die base 104 and the lower die base 206 of the equipment, ensures the isolation of other parts of the equipment from the power-on material, and thus guarantees the safety of the operating personnel and avoids the situation of electric shock of the operating personnel.

[0050] The above is further detailed description of the utility model in combination with specific embodiments, and cannot be determined that the utility model specific implementation is limited to these descriptions. For ordinary skilled in the art to which the utility model belongs, without departing from the concept of the utility model, a number of simple deductions or substitutions can be made, and all should be regarded as belonging to the protection scope determined by the claims submitted by the utility model.

Claims

1. A metal plate piercing and expanding apparatus comprising an upper die unit (100), a lower die unit (200), characterized in that, The upper die unit (100) comprises an upper die plate (101), a support frame (103) and a connecting rod (102) assembled between the upper die plate (101) and the support frame (103), the support frame (103) is connected with a fixing part (103a), the fixing part (103a) is connected with a pressing part (105), the lower die unit (200) comprises a lower die plate (201) and a pressure ring (202) above the lower die plate (201), the pressure ring (202) is provided with a through hole, and the lower die plate (201) is connected with a hole punching and expanding assembly (208), the metal plate is placed on the pressure ring (202), the upper die unit (100) is driven to move downward to drive the pressure ring (202) and the metal plate to move downward, and the hole punching and expanding assembly (208) is used for punching and expanding the metal.

2. The metal plate hole flaring apparatus according to claim 1, wherein The pressure ring (202) and the lower die plate (201) are further provided with a guide pin guide sleeve (203) and an air spring (204), when the pressure ring (202) moves downward, the guide pin guide sleeve (203) is matched to stretch and retract to drive the pressure ring (202) to move relative to the lower die plate (201), and when the pressure ring (202) moves relative to the lower die plate (201), the air spring (204) is matched to stretch and retract.

3. The metal plate hole flaring apparatus of claim 1, wherein The pressing part (105) comprises a pressing disc (105a) and a connecting rod (105b) integrally formed with the pressing disc (105a), and is further provided with a gradient waste hole (105c), when the punching work is performed, the hole punching and expanding assembly (208) penetrates through the metal plate into the gradient waste hole (105c), so that the punching work of the metal plate is completed.

4. The metal plate hole flaring apparatus according to claim 3, wherein The upper part and the bottom of the connecting rod (105b) are provided with pin holes, when the pressing part (105) is connected with the fixing part (103a) through the pin holes in the upper part of the connecting rod (105b), the lower surface of the pressing disc (105a) is flush with the lower surface of the upper die plate (101), and when the pressing part (105) is connected with the fixing part (103a) through the pin holes in the bottom of the connecting rod (105b), the lower surface of the pressing disc (105a) is located above the upper surface of the upper die plate (101).

5. A metal sheet hole flaring apparatus according to claim 3 or 4, wherein The lower die plate (201) is further fixedly connected with a bearing seat (205), one end of the bearing seat (205) extends above the lower die plate (201), the other end extends below the lower die plate (201), and the hole punching and expanding assembly (208) is connected at the top of the bearing seat (205), when the upper die unit (100) moves downward to drive the pressure ring (202) to move downward, the hole punching and expanding assembly (208) penetrates through the through hole to punch and expand the metal plate.

6. The metal plate hole flaring apparatus according to claim 5, wherein The punching and expanding hole assembly (208) comprises a punching piece (208a) and an expanding piece (208b), the expanding piece (208b) is a conical structure, the expanding piece (208b) is connected to the bearing seat (205), the top of the expanding piece (208b) is connected with the punching piece (208a), when punching, the punching piece (208a) penetrates into the gradient waste hole (105c) of the abutting piece (105) from the metal plate to complete the punching work of the metal plate.

7. The metal plate hole flaring apparatus of claim 6, wherein The top of the fixing piece (103a) is connected with the upper die base (104) through the insulating connecting piece (A), and the bottom of the bearing seat (205) is connected with the lower die base (206) through the insulating connecting piece (A), and the insulating connecting piece (A) avoids the power supply of the upper die base (104) and the lower die base (206) of the equipment.

8. The metal plate hole flaring apparatus of claim 1, wherein, The supporting frame (103) and the lower die plate (201) are provided with power supply threaded holes (B), and the power supply of the power supply threaded holes (B) can make the metal plate realize current-assisted test.

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