Punch stretching device with pressing type oil immersion structure

Abstract

The utility model discloses a punch stretching device with a pressing type oil immersion structure, which is characterized in that a connecting rod is driven by a three-axis manipulator to drive a first sucker to move so as to adsorb stacked metal sheets on the uppermost layer and transfer the metal sheets to a supporting piece; then the three-axis mechanical arm is driven to drive a second suction cup to move to suck the metal sheet on the supporting piece and then press the metal sheet downwards, so that an elastic piece is compressed, the metal sheet is immersed in the stretching oil in the oil storage box, and meanwhile, the first suction cup sucks the other metal sheet to be immersed in the oil; in this way, the openings of the first suction cup and the second suction cup cannot suck stretching oil, when the first suction cup and the second suction cup adsorb and fix a metal sheet, the metal sheet does not have the stretching oil, it is guaranteed that the metal sheet is stably adsorbed and fixed, the first suction cup and the second suction cup are effectively prevented from adsorbing the oil into a negative-pressure air pipeline, and the service life of the metal sheet is prolonged. Therefore, the negative pressure control valve is prevented from being blocked or damaged.

Description

Technical Field

[0001] The utility model relates to the technical field of punch stretching devices, in particular to a punch stretching device with a pressing oil-immersed structure. Background Art

[0002] The metal sheet stretching process is a processing technology that uses a stamping device as a pressure source to press a flat blank into various shapes through a drawing die after the flat blank is punched into a specific contour. During the stretching process, the thin plate material is subjected to the tensile force, which mainly involves the dislocation movement and interaction in the crystal structure, and begins to undergo plastic deformation. At the same time, the shape of the material needs to change without breaking, so special stretching oil is needed in the process.

[0003] During the stretching process, the stretching oil can continuously provide an efficient lubricating and friction-reducing oil film during plastic changes, effectively reduce the friction coefficient, reduce the friction between the workpiece and the mold, prevent scratches and abrasions on the workpiece surface, thereby improving the surface quality and precision of the workpiece. In addition, the stretching oil also has good cooling performance, can effectively control the generation of black sludge, reduce the temperature of the workpiece and the mold, prevent thermal deformation and burns of the workpiece, and extend the service life of the mold.

[0004] The existing Chinese invention patent with authorization announcement number CN105268872B discloses an automatic sorting oil-immersed feeding robot for a stretching hydraulic press. The device has the following actions during use: the right suction cup soaks the material to be processed in the oil-immersed structure, then sucks up the material again and finally places it on the processing table. This will cause two problems. First, the material is completely immersed in the oil, and the oil on the surface of the material will cause the suction cup to be unable to absorb and fix the material. Second, the suction cup will absorb the oil on the material into the negative pressure air pipeline when it is adsorbed under negative pressure, thereby causing blockage or damage to the negative pressure control valve. Utility Model Content

[0005] In order to overcome the shortcomings of the prior art, the utility model provides a punch stretching device with a press-type oil-immersed structure to solve the problem that the existing oil-immersed structure may cause the suction cup to be unable to adsorb and fix the material, and the suction cup will adsorb the oil on the material into the negative pressure air pipeline when adsorbing under negative pressure, thereby causing blockage or damage to the negative pressure control valve.

[0006] In order to solve the above technical problems, the utility model provides the following technical solutions: a punch stretching device with a press-type oil-immersed structure, comprising:

[0007] A feeding mechanism, comprising a support plate carrying a plurality of stacked metal sheets;

[0008] Stretch punch press with processing stations;

[0009] The oil immersion mechanism comprises an oil storage box and an elastic floating pin, wherein the oil storage box is provided with stretching oil, and at least one elastic floating pin is fixedly installed on the inner bottom surface of the oil storage box, wherein the elastic floating pin comprises an elastic member and a supporting member;

[0010] The driving mechanism comprises a three-axis manipulator and a connecting rod, wherein the output end of the three-axis manipulator is fixedly connected to the connecting rod;

[0011] A suction cup mechanism, fixedly arranged on the connecting rod, comprising a first suction cup and a second suction cup, wherein the driving mechanism drives the first suction cup to move to absorb the topmost metal sheet stacked on the support plate and transfer it to the top surface of the support member, and the second suction cup is used to absorb the metal sheet on the top surface of the support member;

[0012] Among them, when the metal sheet is transferred to the top surface of the support, the elastic member is in its original length state, and the height of the top surface of the support is not lower than the oil level in the oil storage box. When the driving mechanism drives the second suction cup to drive the metal sheet on the top surface of the support to move and squeeze the elastic lifting pin, the elastic member is in a compressed state, and the tensile oil in the oil storage box submerges the metal sheet.

[0013] Preferably, a partition is fixedly installed horizontally in the oil storage box, the supporting member includes a supporting part and a limiting part, a plurality of elastic members and a limiting rod are fixedly installed on the inner bottom surface of the oil storage box, the top end of the elastic member is fixedly connected to the limiting part, the elastic member is sleeved on the periphery of the limiting rod, the supporting part is fixedly installed on the top end of the limiting part, the size of the top surface of the limiting part is larger than the size of the bottom surface of the supporting part, the supporting part movably passes through the partition, when the elastic member is in the original length state, the limiting rod does not contact the limiting part, the top surface of the limiting part abuts against the bottom surface of the partition, and the elastic member is a spring.

[0014] Preferably, the oil immersion mechanism further comprises an oil supply assembly, the oil supply assembly comprises a pneumatic vacuum oil pump and an oil inlet pipe, an oil inlet is provided on one side of the outer wall of the oil storage box, and the oil inlet pipe is fixed in the oil inlet.

[0015] Preferably, an oil outlet is opened on one side of the outer wall of the oil storage box, and the height position of the lowest point of the opening of the oil outlet is not higher than the height position of the top surface of the support member when the elastic member is in the original length state.

[0016] Preferably, an oil outlet pipe is fixed in the oil outlet, and one end of the oil outlet pipe enters the oil collecting tank.

[0017] Preferably, the top surface of the partition is detachably provided with a plurality of positioning blocks to limit the position of metal sheets of different sizes.

[0018] Preferably, the feeding mechanism also includes a support table, a driving member and a plurality of limit columns. The support table is detachably and fixedly mounted with a plurality of limit columns to limit the stacked metal sheets. The output end of the driving member is fixedly connected to the support plate, and the driving member drives the support plate to move along the length direction of the limit columns.

[0019] Preferably, a third suction cup is fixedly mounted on the connecting rod for unloading the metal sheet processed at the processing station.

[0020] Preferably, the stretching punch comprises a punch, and the opening areas of the first suction cup, the second suction cup and the third suction cup are not larger than the horizontal projection area of ​​the punch.

[0021] Compared with the prior art, the utility model can achieve the following beneficial effects:

[0022] The utility model drives the connecting rod by a three-axis manipulator to drive the first suction cup to move to absorb the topmost metal sheet of the stack and then transfer it to the support member, and then drives the three-axis manipulator to drive the second suction cup to move to absorb the metal sheet on the support member and press it downward to compress the elastic member, so that the stretching oil in the oil storage box immerses the metal sheet. At the same time, the first suction cup absorbs another metal sheet to be immersed in oil, so as to ensure that the openings of the first suction cup and the second suction cup will not absorb the stretching oil, and when the first suction cup and the second suction cup absorb and fix the metal sheet, there is no stretching oil on the metal sheet, which ensures stable absorption and fixation of the metal sheet while effectively preventing the first suction cup and the second suction cup from absorbing oil into the negative pressure air pipeline, thereby avoiding blockage or damage to the negative pressure control valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0024] Figure 2 This is a schematic diagram of the structure of the oil storage box, oil inlet, oil outlet, elastic floating pin, partition and positioning block of the utility model;

[0025] Figure 3 This is a schematic diagram of the structure of the elastic floating pin of the utility model;

[0026] Among them: 1. feeding mechanism; 11. driving part; 12. supporting plate; 13. limiting column; 2. oil immersion mechanism; 21. oil storage box; 22. oil inlet; 23. oil outlet; 24. elastic floating pin; 241. supporting part; 242. limiting part; 243. elastic part; 244. limiting rod; 25. pneumatic vacuum oil pump; 26. oil inlet pipe; 27. oil outlet pipe; 28. oil collecting box; 29. ​​partition; 210. positioning block; 3. stretching punch; 4. three-axis manipulator; 5. connecting rod; 6. first suction cup; 7. second suction cup; 8. third suction cup. DETAILED DESCRIPTION

[0027] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific embodiments. However, the following embodiments are only preferred embodiments of the present invention, not all of them. Based on the embodiments in the implementation mode, other embodiments obtained by those skilled in the art without creative work all belong to the protection scope of the present invention. The experimental methods in the following embodiments are conventional methods unless otherwise specified. The materials, reagents, etc. used in the following embodiments are all commercially available unless otherwise specified.

[0028] like Figure 1-Figure 3 As shown, the utility model provides a punch stretching device with a press-type oil-immersed structure, comprising a feeding mechanism 1, a stretching punch 3, an oil-immersed mechanism 2, a driving mechanism and a suction cup mechanism;

[0029] The feeding mechanism 1 comprises a support plate 12 carrying a plurality of stacked metal sheets;

[0030] The stretching punch 3 has a processing station, which is an existing processing equipment and will not be described in detail;

[0031] The oil immersion mechanism 2 includes an oil storage box 21 and an elastic floating pin 24. The oil storage box 21 is provided with stretching oil. At least one elastic floating pin 24 (four are taken as an example here) is fixedly installed on the bottom surface of the inner part of the oil storage box 21. The elastic floating pin 24 includes an elastic member 243 and a support member.

[0032] The driving mechanism includes a three-axis manipulator 4 and a connecting rod 5, and the output end of the three-axis manipulator 4 is fixedly connected to the connecting rod 5;

[0033] The suction cup mechanism is fixed on the connecting rod 5, and includes a first suction cup 6 and a second suction cup 7. The driving mechanism drives the first suction cup 6 to move to absorb the topmost metal sheet stacked on the support plate 12 and transfer it to the top surface of the support member. The second suction cup 7 is used to absorb the metal sheet on the top surface of the support member.

[0034] When the metal sheet is transferred to the top surface of the support, the elastic member 243 is in the original length state, and the height of the top surface of the support is not lower than the oil level in the oil storage box 21. When the driving mechanism drives the second suction cup 7 to drive the metal sheet on the top surface of the support to move and squeeze the elastic floating pin 24, the elastic member 243 is in a compressed state, and the tensile oil in the oil storage box 21 immerses the metal sheet;

[0035] When the device needs to be used to stretch the metal sheet, the three-axis manipulator 4 is adjusted to drive the connecting rod 5 to move, and the connecting rod 5 drives the first suction cup 6 to move, so that the first suction cup 6 fits with the topmost metal sheet of the stack, and the topmost metal sheet is fixed by the first suction cup 6, and then the three-axis manipulator 4 is adjusted to transport the metal sheet to the top surface of the support member of the elastic floating pin 24, and then the first suction cup 6 no longer fixes the metal sheet (when the metal sheet is placed on the top surface of the support member, its own weight will not cause compression to the elastic member 243);

[0036] Then adjust the three-axis manipulator 4 again to drive the connecting rod 5 to move so that the second suction cup 7 is located just above the metal sheet on the support and adsorbs it, and then drive the three-axis manipulator 4 to drive the second suction cup 7 to move downward. At this time, the elastic member 243 is gradually compressed until the stretching oil in the oil storage box 21 completely immerses the metal sheet (at this time, the first suction cup 6 is in contact with and adsorbs the uppermost metal sheet on the support plate 12), and at this time, the second suction cup 7 will not absorb the oil in the oil storage box 21;

[0037] After the metal sheet on the support is completely soaked in oil, the three-axis manipulator 4 is adjusted to drive the connecting rod 5 to move, and the connecting rod 5 drives the first suction cup 6 and the second suction cup 7 to move, so that the second suction cup 7 places the metal sheet soaked in oil on the processing station of the stretching punch 3, and at this time, the first suction cup 6 simultaneously places the metal sheet not soaked in oil on the support;

[0038] Subsequently, the three-axis manipulator 4 is adjusted to drive the connecting rod 5 to move, so that the second suction cup 7 adsorbs the non-oiled metal sheet on the support and then immerses it in oil. At the same time, the first suction cup 6 adsorbs and fixes the next non-oiled metal sheet. At this time, the metal sheet immersed in oil on the processing station is stretched and formed by the stretching punch 3. Such cyclic processing can realize continuous material taking, oil immersion and stretching, and the processing efficiency is high. When the first suction cup 6 and the second suction cup 7 adsorb and fix the metal sheet, there is no stretching oil on the metal sheet, which can avoid the openings of the first suction cup 6 and the second suction cup 7 from contacting with the oil. While ensuring stable adsorption and fixation of the metal sheet, the first suction cup 6 and the second suction cup 7 are effectively prevented from absorbing oil into the negative pressure air pipeline, thereby avoiding blockage or damage to the negative pressure control valve.

[0039] It should be noted that when the device is just started up, a metal sheet can be manually placed on the top surface of the elastic floating pin 24 in advance. In this way, when the first suction cup 6 absorbs the stacked metal sheets for the first time, the second suction cup 7 can be prevented from being directly immersed in the oil in the oil storage box 21, thereby further preventing the second suction cup 7 from being unable to absorb and fix the metal sheet later.

[0040] In addition, the first suction cup 6 and the second suction cup 7 can be detachably fixed on the connecting rod 5. The specific height positions of the first suction cup 6 and the second suction cup 7 on the connecting rod 5, the height position of the processing station, the height position of the oil storage box 21, and the height position of the top stacked metal sheet can be set according to needs. It is only necessary to ensure that the above-mentioned continuous work can be carried out, and no limitation is made here.

[0041] like Figure 2 and Figure 3 As shown, a partition 29 is fixedly installed horizontally in the oil storage box 21, and the support member includes a support portion 241 and a limiting portion 242. A plurality of elastic members 243 and a limiting rod 244 are fixedly installed on the bottom surface of the oil storage box 21. The top of the elastic member 243 is fixedly connected to the limiting portion 242. The elastic member 243 is set as a spring. The elastic member 243 is sleeved on the periphery of the limiting rod 244. The top of the limiting portion 242 is fixedly installed with the support portion 241. The size of the top surface of the limiting portion 242 is larger than the size of the bottom surface of the support portion 241. The support portion 241 movably penetrates the partition 29. When the elastic member 243 is in the original length state, the limiting rod 244 does not contact the limiting portion 242, and the top surface of the limiting portion 242 abuts against the bottom surface of the partition 29.

[0042] By setting the limit rod 244, when the three-axis manipulator 4 drives the second suction cup 7 to drive the metal sheet to move downward, the downward movement distance of the metal sheet can be limited, ensuring that the metal sheet can be completely immersed in the stretching oil, while preventing the elastic member 243 from being over-compressed, causing it to be unable to rebound to its original state, affecting subsequent work, and can extend the service life of the elastic member 243;

[0043] By providing the limiting portion 242 , it can be ensured that the elastic member 243 can recover its original length each time after being compressed and rebounded, and it can be ensured that the supporting portion 241 will not move and protrude from the partition plate 29 .

[0044] like Figure 1 and Figure 2 As shown, the oil immersion mechanism 2 also includes an oil supply assembly, which includes a pneumatic vacuum oil pump 25 (existing equipment) and an oil inlet pipe 26. An oil inlet 22 is opened on one side of the outer wall of the oil storage box 21, and the oil inlet pipe 26 is fixed in the oil inlet 22;

[0045] By providing a pneumatic vacuum oil pump 25 , the stretching oil can be introduced into the oil storage box 21 through the oil inlet pipe 26 , so that the automatic oiling work in the oil storage box 21 can be completed.

[0046] like Figure 1 and Figure 2 As shown, an oil outlet 23 is provided on one side of the outer wall of the oil storage box 21, and the height position of the lowest point of the opening of the oil outlet 23 is not higher than the height position of the top surface of the support member when the elastic member 243 is in the original length state;

[0047] By setting the oil outlet 23, it is possible to prevent the oil supply component from adding excessive stretching oil when replenishing oil into the oil storage box 21, thereby preventing the stretching oil from grinding the metal sheet when the metal sheet is placed on the support, and ensuring that the second suction cup 7 will not absorb the stretching oil when adsorbing and fixing the metal sheet on the support.

[0048] like Figure 1 and Figure 2 As shown, an oil outlet pipe 27 is fixed inside the oil outlet 23, and one end of the oil outlet pipe 27 enters the oil collecting tank 28;

[0049] By providing the oil outlet pipe 27 and the oil collecting tank 28, when the oil supply assembly supplies too much oil, the excess oil can be introduced from the oil outlet 23 through the oil outlet pipe 27 into the oil collecting tank 28 for collection, so that when a certain amount is collected later, it can be put into the pneumatic vacuum oil pump 25 for recycling.

[0050] like Figure 2 As shown, the top surface of the partition 29 is detachably provided with a plurality of positioning blocks 210 to limit the position of metal sheets of different sizes;

[0051] By setting the positioning blocks 210, when the metal sheet is placed on the support, each positioning block 210 contacts the outer wall of the metal sheet to limit the metal sheet. At the same time, the positioning blocks 210 can be detachably arranged on the partition 29, and the position of the positioning blocks 210 can be adjusted, thereby facilitating the limiting of metal sheets of different sizes.

[0052] like Figure 1 As shown, the feeding mechanism 1 also includes a support platform, a driving member 11 (a cylinder can be selected) and a plurality of limiting columns 13. The plurality of limiting columns 13 can be detachably fixedly installed on the support platform to limit the stacked metal sheets. The output end of the driving member 11 is fixedly connected to the support plate 12, and the driving member 11 drives the support plate 12 to move along the length direction of the limiting columns 13.

[0053] To ensure that each time the three-axis manipulator 4 drives the connecting rod 5 to drive the first suction cup 6 to move, it can absorb the top metal sheet of the stack, after the first suction cup 6 absorbs and removes the top metal sheet of the stack, the driving member 11 is adjusted to drive the support plate 12 to move upward, thereby driving the stacked metal sheet to move up a distance of the thickness of the metal sheet, thereby ensuring that the first suction cup 6 can subsequently stably absorb the top metal sheet of the stack at the same height;

[0054] By providing a detachable limiting column 13, the position of the limiting column 13 can be adjusted, so that the limiting column 13 can limit the metal sheets of different sizes.

[0055] like Figure 1 As shown, a third suction cup 8 is fixedly mounted on the connecting rod 5, and is used to unload the metal sheet processed at the processing station;

[0056] By setting up the third suction cup 8, when the three-axis manipulator 4 drives the connecting rod 5 to drive the first suction cup 6 to absorb and transfer the top layer of the stacked metal sheet to the support, the third suction cup 8 will take the stretched product away from the processing station to complete the automatic unloading work.

[0057] The stretching punch 3 includes a punch, and the opening areas of the first suction cup 6, the second suction cup 7 and the third suction cup 8 are not larger than the horizontal projection area of ​​the punch;

[0058] From the principle of the stretching die, since there will be no friction in the area of ​​the horizontal projection area of ​​the punch corresponding to the metal sheet during the stretching process, there is no need to use stretching oil lubrication in the area of ​​the horizontal projection area of ​​the punch corresponding to the metal sheet. It is preferred to set the opening area of ​​the first suction cup 6, the second suction cup 7 and the third suction cup 8 to be equal to the horizontal projection area of ​​the punch, so that the area where the suction cup fits the metal sheet will not be immersed in oil, thereby meeting the processing requirements while maximizing the savings in production costs.

[0059] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A punch stretching device with a press-type oil-immersed structure, It is characterized in that include: A feeding mechanism (1) comprises a support plate (12) for carrying a plurality of stacked metal sheets; A stretching punch (3) having a processing station; The oil immersion mechanism (2) comprises an oil storage box (21) and an elastic floating pin (24), wherein the oil storage box (21) is provided with stretching oil, and at least one elastic floating pin (24) is fixedly mounted on the inner bottom surface of the oil storage box (21), and the elastic floating pin (24) comprises an elastic member (243) and a support member; The driving mechanism comprises a three-axis manipulator (4) and a connecting rod (5), wherein the output end of the three-axis manipulator (4) is fixedly connected to the connecting rod (5); A suction cup mechanism is fixedly arranged on the connecting rod (5), and comprises a first suction cup (6) and a second suction cup (7); the driving mechanism drives the first suction cup (6) to move to absorb the topmost metal sheet stacked on the support plate (12) and transfer it to the top surface of the support member; the second suction cup (7) is used to absorb the metal sheet on the top surface of the support member; When the metal sheet is transferred to the top surface of the support, the elastic member (243) is in its original length, and the height of the top surface of the support is not lower than the oil level in the oil storage box (21). When the driving mechanism drives the second suction cup (7) to drive the metal sheet on the top surface of the support to move and squeeze the elastic lifting pin (24), the elastic member (243) is in a compressed state, and the metal sheet is immersed in the tensile oil in the oil storage box (21).

2. The punch stretching device with a press-type oil-immersed structure according to claim 1, Features: A partition (29) is fixedly installed horizontally in the oil storage box (21); the support member comprises a support portion (241) and a limiting portion (242); a plurality of elastic members (243) and a limiting rod (244) are fixedly installed on the bottom surface of the oil storage box (21); the top end of the elastic member (243) is fixedly connected to the limiting portion (242); the elastic member (243) is sleeved on the periphery of the limiting rod (244); the top end of the limiting portion (242) is fixedly installed with the support portion (241); the size of the top surface of the limiting portion (242) is larger than the size of the bottom surface of the support portion (241); the support portion (241) movably penetrates the partition (29); when the elastic member (243) is in the original length state, the limiting rod (244) does not contact the limiting portion (242); the top surface of the limiting portion (242) abuts against the bottom surface of the partition (29); and the elastic member (243) is a spring.

3. The punch stretching device with a press-type oil-immersed structure according to claim 1, Features: The oil immersion mechanism (2) further comprises an oil supply assembly, which comprises a pneumatic vacuum oil pump (25) and an oil inlet pipe (26). An oil inlet (22) is provided on one side of the outer wall of the oil storage box (21), and the oil inlet pipe (26) is fixed in the oil inlet (22).

4. The punch stretching device with a press-type oil-immersed structure according to claim 3, Features: An oil outlet (23) is provided on one side of the outer wall of the oil storage box (21), and the height position of the lowest point of the opening of the oil outlet (23) is not higher than the height position of the top surface of the support member when the elastic member (243) is in the original length state.

5. The punch stretching device with a press-type oil-immersed structure according to claim 4, Features: An oil outlet pipe (27) is fixed inside the oil outlet (23), and one end of the oil outlet pipe (27) enters an oil collecting tank (28).

6. The punch stretching device with a press-type oil-immersed structure according to claim 2, Features: The top surface of the partition (29) is detachably provided with a plurality of positioning blocks (210) for limiting the position of metal sheets of different sizes.

7. The punch stretching device with a press-type oil-immersed structure according to claim 1, Features: The feeding mechanism (1) further comprises a support platform, a driving member (11) and a plurality of limiting columns (13); the plurality of limiting columns (13) are detachably fixedly mounted on the support platform to limit the stacked metal sheets; the output end of the driving member (11) is fixedly connected to the support plate (12); the driving member (11) drives the support plate (12) to move along the length direction of the limiting columns (13).

8. The punch stretching device with a press-type oil-immersed structure according to claim 1, Features: A third suction cup (8) is fixedly mounted on the connecting rod (5) and is used for unloading the metal sheet processed at the processing station.

9. The punch stretching device with a press-type oil-immersed structure according to claim 8, Features: The stretching punch (3) comprises a punch, and the opening areas of the first suction cup (6), the second suction cup (7) and the third suction cup (8) are not larger than the horizontal projection area of ​​the punch.

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