Automatic embracing cutting die frame for oil rail forgings

Abstract

The utility model relates to the technical field of embracing cutting dies, and discloses an automatic embracing cutting die frame for oil rail forgings, which comprises an upper die frame, a lower die frame and a guide mechanism, the upper die frame comprises an upper die plate, the bottom of the upper die plate is connected with a connecting block, the bottom of the connecting block is connected with a first base, and one side of the bottom of the first base is connected with a trimming female die. A fixing plate is installed on the inner side wall of the first base, and a pressing block located on one side of the trimming female die is installed at the bottom of the fixing plate. The nitrogen spring is arranged in the closed area defined by the upper die plate, the connecting block, the material pressing block and the fixing plate and fixed to the surface of the upper die plate, pollution and erosion of cooling water and oxide skin to the nitrogen spring are effectively isolated, the service life of the nitrogen spring is prolonged, the working stability and reliability of the nitrogen spring are guaranteed, and meanwhile the nitrogen spring is prevented from being damaged. Due to the fact that the contact time of the pressing block and the forge piece is short and the temperature is low, conduction of high temperature to the nitrogen spring is reduced, and the service life of the nitrogen spring is further prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of holding and cutting dies, in particular to an automatic holding and cutting die frame for oil rail forgings. Background Technique

[0002] The oil rail is used to store fuel and suppress the pressure fluctuations generated by the high-pressure pump for oil supply and the fuel injector for fuel injection, ensuring the stability of the system pressure. The high-pressure oil rail is shared by all cylinders and is the symbol of the common rail system.

[0003] Under the background of carbon neutrality, the development of fuel vehicles faces severe challenges. To meet the increasingly stringent emission standards, one of the technical routes is to increase the fuel pressure to make it burn fully. To ensure that the oil rail does not leak under high pressure, higher requirements are put forward for the wall thickness uniformity of the oil rail. For forgings, the factors affecting the wall thickness uniformity of the oil rail mainly include the straightness of the oil rail forging, the position accuracy of the fuel injector seat, etc. For long-axis branched forgings such as stainless steel oil rails, when trimming, the force on each part is uneven. Especially after the cutting edge is worn, the force is more uneven, resulting in the trimming of the flash at each part in sequence. The oil rail at the part where trimming occurs first has a tendency to move further away from the flash, while the part where trimming occurs later will prevent the oil rail from moving away from the flash, resulting in the rotation of the oil rail and the deformation of branches such as columns.

[0004] In the Chinese patent with the authorization announcement number CN209647338U, an integral forging stainless steel oil rail trimming die frame is disclosed, providing a trimming die frame for integral forging stainless steel oil rails, mainly including an upper die frame body and a lower die frame body, solving the problems of bruising and trimming burrs caused by the misalignment of forgings during trimming; the following defects exist in the above patent: after the oil rail forging is trimmed, it directly falls into the receiving tray, and a certain proportion of the forgings will be bruised. There is no pressure block to pre-press the oil rail forging during trimming, which will lead to poor straightness, position accuracy of the fuel injector seat, and bolt column bracket size of the oil rail forging during trimming, and additional shaping or straightening processes are required in the subsequent process;

[0005] In the Chinese patent with the authorization announcement number CN212551342U, a trimming and straightening composite die for manufacturing integral stainless steel oil rail forgings is disclosed, providing a trimming and straightening composite die for stainless steel oil rail forgings, including an upper die assembly and a lower die assembly. The lower die assembly is increased with a lower die seat core, a floating plate, and a lower elastic element, which can effectively ensure the dimensional accuracy such as the straightness and position accuracy of the stainless steel oil rail; the following defects exist in the above patent: the trimming and straightening composite die has no flash ejection device, and it is not easy to take the flash after trimming, and automatic production cannot be realized. During the trimming process, the forging is always placed on the die seat core. Although there is a water cooling device, the temperature of the floating plate is still relatively high, resulting in a very low service life of the nitrogen spring; at the same time, the nitrogen spring is placed below the die frame and is open, and dust such as oxide scale is easy to fall into it, thus reducing the service life of the nitrogen spring;

[0006] In a Chinese patent with the authorization announcement number CN216656022U, a high-pressure oil rail trimming and shaping composite die is disclosed, and a high-pressure oil rail trimming and shaping composite die is provided, including a trimming upper die, a base, a punching die, a trimming lower die, a discharge spring, a discharge plate and a nitrogen spring and other components. The trimming and shaping are carried out simultaneously to solve the problem of springback after straightening. The above patent has the following defects: the trimming and shaping composite die has no water cooling device, and the nitrogen spring is easily damaged; after trimming, the forging and the flash are basically at the same height, and the flash is either stuck on the punching die or stuck on the forging, which is inconvenient to take, and also cannot realize automated production. Therefore, an oil rail forging automated cutting die holder is proposed. Utility Model Content

[0007] The utility model aims to provide an automatic cutting die frame for oil rail forgings to solve the problems raised in the above-mentioned background technology.

[0008] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an automatic cutting die frame for oil rail forgings, comprising an upper die frame, a lower die frame and a guide mechanism;

[0009] The upper mold frame includes an upper mold plate, a connecting block is connected to the bottom of the upper mold plate, a first base is connected to the bottom of the connecting block, a trimming die is connected to one side of the bottom of the first base, a fixing plate is installed on the inner side wall of the first base, and a pressing block located on one side of the trimming die is installed at the bottom of the fixing plate;

[0010] The lower mold frame includes a lower mold plate, a cylinder is provided on one side of the top of the lower mold plate, a floating positioning plate is connected to the top of the cylinder, a second base is provided on one side of the lower mold plate, and a trimming punch is installed on the top of the second base;

[0011] The oil rail forging body located at the lower side of the pressing block is placed on the top of the trimming punch.

[0012] Preferably, a nitrogen spring is fixed to the bottom of the upper mold plate, and one end of the bottom of the nitrogen spring is mounted on one side of the top of the fixed plate.

[0013] Preferably, the four corners of the floating positioning plate are connected with limiting bolts, and the cylinder push rod end is fixed to the top of the lower template.

[0014] Preferably, a plurality of first guide pillars are fixed on the top of the lower template, and guide pillar holes which are slidably sleeved on the outer sides of the first guide pillars are provided on the surface of the floating positioning plate.

[0015] Preferably, a circular arc is provided on the outer side of the first guide column, and a groove is provided on the top of the floating positioning plate.

[0016] Preferably, a second internal-threaded cylindrical pin is connected between the upper template and the connecting block, a first internal-threaded cylindrical pin is connected between the connecting block and the first base, and a third internal-threaded cylindrical pin is connected between the first base and the trimming die.

[0017] Preferably, a fourth internal-threaded cylindrical pin is connected between the lower template and the second base.

[0018] Preferably, the guiding mechanism includes a second guide post and a guide sleeve. The outer side of the second guide post is fixed to one side of the lower template, and the outer side of the guide sleeve is fixed to one side of the upper template.

[0019] Compared with the prior art, the present utility model adopts the above technical solutions and has the following technical effects:

[0020] 1. By placing the nitrogen spring in the closed area surrounded by the upper template, the connecting block, the blank holding block and the fixing plate and fixing it on the surface of the upper template, the nitrogen spring is effectively isolated from the pollution and erosion of cooling water and oxide scale, which not only prolongs the service life of the nitrogen spring, but also ensures its working stability and reliability. At the same time, since the contact time between the blank holding block and the forging is short and the temperature is low, the conduction of high temperature to the nitrogen spring is reduced, further prolonging the life of the nitrogen spring.

[0021] 2. By setting the cylinder, the ejection time of the flash can be controlled, which is coordinated with the taking-away action of the main body of the oil rail forging, realizing an automated production process, which not only improves the production efficiency, but also reduces the need for manual intervention and the possibility of errors.

[0022] 3. By using the floating positioning plate, it is ensured that the placement position of the main body of the oil rail forging is accurate every time trimming is performed, which helps to achieve a precise trimming effect, avoids over-trimming or burr generation, improves the processing quality of the product. The flash after trimming directly falls on the surface of the floating positioning plate, and then the cylinder can easily eject it, simplifying the waste treatment process, reducing the need for manual cleaning, and improving the cleanliness and safety of the production line. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0024] Figure 1 It is a schematic structural diagram of the nitrogen spring of the present utility model;

[0025] Figure 2Structural schematic diagram of the cylinder part of the present utility model;

[0026] Figure 3 Structural schematic diagram of the third internal thread cylindrical pin of the present utility model;

[0027] Figure 4 Structural schematic diagram of the guide pillar hole and groove of the present utility model;

[0028] Figure 5 Structural schematic diagram of the first guide pillar of the present utility model;

[0029] Figure 6 Structural schematic diagram of the arc part of the present utility model.

[0030] Explanation of reference numerals: 11, upper template; 12, connecting block; 13, nitrogen spring; 14, fixed plate; 15, first base; 16, trimming die; 17, blank holder; 101, first internal thread cylindrical pin; 102, second internal thread cylindrical pin; 103, third internal thread cylindrical pin; 21, lower template; 22, limit bolt; 23, cylinder; 24, floating positioning plate; 2401, guide pillar hole; 2402, groove; 25, first guide pillar; 2501, arc; 26, second base; 27, trimming punch; 201, fourth internal thread cylindrical pin; 31, second guide pillar; 32, guide bushing; 300, main body of oil rail forging. Detailed implementation manners

[0031] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0032] It should be noted that the structures, ratios, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those who are familiar with this technology to understand and read, and are not used to limit the limited conditions that can be implemented in this application. Therefore, they do not have a substantial technical meaning. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effects that can be produced by this application and the purposes that can be achieved, should still fall within the scope that can be covered by the technical content disclosed in this application.

[0033] Embodiment

[0034] Please refer to Figures 1-5 , the present utility model provides a technical solution: an automatic holding and trimming die set for oil rail forgings, including an upper die set, a lower die set and a guiding mechanism, and the upper die set and the lower die set are respectively connected to the surface of the workbench of the press.

[0035] The upper die set includes an upper template 11. A connecting block 12 is connected to the bottom of the upper template 11. A first base 15 is connected to the bottom of the connecting block 12. A trimming concave die 16 is connected to one side of the bottom of the first base 15. A fixing plate 14 is installed on the inner side wall of the first base 15. A blank holding block 17 located on one side of the trimming concave die 16 is installed at the bottom of the fixing plate 14;

[0036] A nitrogen spring 13 is fixed to the bottom of the upper template 11. There is one nitrogen spring 13 on each of the left and right sides. The maximum stroke of the nitrogen spring 13 is 32 mm, and the working stroke is 90% of the maximum stroke. The initial pressure of the nitrogen spring 13 is 66300 N, and the maximum pressure is 99000 N. One end of the bottom of the nitrogen spring 13 is installed on one side of the top of the fixing plate 14.

[0037] The lower die set includes a lower template 21. A cylinder 23 is provided on one side of the top of the lower template 21. A floating positioning plate 24 is connected to the top of the cylinder 23. A second base 26 is arranged on one side of the lower template 21. A trimming punch 27 is installed on the top of the second base 26. A fourth internal thread cylindrical pin 201 is connected between the lower template 21 and the second base 26, and the fourth internal thread cylindrical pin 201 ensures the accuracy of the relative position between the lower template 21 and the second base 26;

[0038] Limit bolts 22 are connected to the four corners of the floating positioning plate 24. The function of the limit bolts 22 is to prevent the floating positioning plate 24 from falling off the outside of the first guide post 25 when the cylinder 23 ejects. The push rod end of the cylinder 23 is fixed to the top of the lower template 21. Because the flash cut from the main body 300 of the oil rail forging has a relatively high temperature, part of the heat will be conducted to the surface of the floating positioning plate 24. In order to increase the service life of the cylinder 23, the cylinder 23 is installed in an inverted manner;

[0039] A number of first guide posts 25 are fixed to the top of the lower template 21. A guide post hole 2401 that is slidably sleeved on the outside of the first guide post 25 is formed on the surface of the floating positioning plate 24. An arc 2501 is provided on the outside of the first guide post 25. A groove 2402 is provided on the top of the floating positioning plate 24. The first guide post 25 is matched with the guide post hole 2401. The clearance between the first guide post 25 and the guide post hole 2401 is 0.2 mm on one side. And the upper half of the first guide post 25 is square. During sliding, it is guided and positioned by the arcs 2501 at the four corners. The length of the square and the arc 2501 is L, and L is 25 mm, so that the position of the floating positioning plate 24 is accurate every time it moves up and down, thus ensuring the accurate position of the main body 300 of the oil rail forging and avoiding over-cutting or scratching phenomena when trimming the main body 300 of the oil rail forging. The size of the groove 2402 is D, the width is 80 mm, and the depth is 5 mm, showing a state of successive penetration.

[0040] A second internal-threaded cylindrical pin 102 is connected between the upper template 11 and the connecting block 12. The second internal-threaded cylindrical pin 102 ensures the accuracy of the relative position between the upper template 11 and the connecting block 12. A first internal-threaded cylindrical pin 101 is connected between the connecting block 12 and the first base 15. The first internal-threaded cylindrical pin 101 ensures the accuracy of the relative position between the connecting block 12 and the first base 15. A third internal-threaded cylindrical pin 103 is connected between the first base 15 and the trimming die 16. The third internal-threaded cylindrical pin 103 ensures the accuracy of the relative position between the first base 15 and the trimming die 16.

[0041] The top of the trimming punch 27 is placed with the main body 300 of the oil rail forging located under the blank holder 17.

[0042] The guiding mechanism includes a second guide post 31 and a guide sleeve 32. The outer side of the second guide post 31 is fixed to one side of the lower template 21, and the outer side of the guide sleeve 32 is fixed to one side of the upper template 11.

[0043] Working principle: When machining the main body 300 of the oil rail forging is required, at this time, the air cylinder 23 jacks up the floating positioning plate 24, and the external manipulator gripper places the main body 300 of the oil rail forging on the top of the floating positioning plate 24. At this time, the floating positioning plate 24 descends, so that the main body 300 of the oil rail forging falls on the top of the trimming punch 27. Then the upper template 11 drives the nitrogen spring 13 to move downward, so that the blank holder 17 first contacts the main body 300 of the oil rail forging. The upper template 11 continues to move downward, so that the nitrogen spring 13 is compressed. At this time, the nitrogen spring 13 applies a pre-pressure to the main body 300 of the oil rail forging. Subsequently, the upper template 11 continues to move downward until the flash on the outer side of the main body 300 of the oil rail forging is cut off, and at the same time, the flash falls on the surface of the floating positioning plate 24;

[0044] At this time, the upper template 11 is lifted upward, the manipulator gripper clamps away the trimmed main body 300 of the oil rail forging, the air cylinder 23 jacks upward to lift the flash, so that the height of the flash is higher than that of the trimming punch 27, and finally the manipulator clamps away the flash;

[0045] The upper template 11, the connecting block 12, the blank holder 17 and the fixing plate 14 enclose a closed area. The nitrogen spring 13 is placed therein and fixed on the surface of the upper template 11. When cooling the die, the cooling water will not pollute the nitrogen spring 13, nor will scale fall into the inner side of the nitrogen spring 13, prolonging the service life of the nitrogen spring 13. When trimming, the contact time between the blank holder 17 and the forging is short, and the temperature of the blank holder 17 is low, reducing the conduction of high temperature to the nitrogen spring 13 and prolonging the service life of the nitrogen spring 13;

[0046] At the same time, an air cylinder 23 is arranged on one side of the lower template 21, which can control the ejection time of the flash. The flash is ejected after the main body 300 of the oil rail forging is taken away, which is easy to realize automatic production;

[0047] Moreover, when trimming, the main body 300 of the fuel rail forging is positioned by the floating positioning plate 24, which can ensure that the placement position of the main body 300 of the fuel rail forging is accurate each time trimming is performed. There is no over-trimming or burr after trimming, and the flash after trimming falls on the surface of the floating positioning plate 24. The flash can be ejected by the cylinder 23.

[0048] In summary, by placing the nitrogen spring 13 in the closed area surrounded by the upper template 11, the connecting block 12, the blank holding block 17 and the fixed plate 14 and fixing it on the surface of the upper template 11, the contamination and erosion of the nitrogen spring 13 by cooling water and scale are effectively isolated. This not only extends the service life of the nitrogen spring 13, but also ensures its working stability and reliability. At the same time, since the contact time between the blank holding block 17 and the forging is short and the temperature is low, the conduction of high temperature to the nitrogen spring 13 is reduced, further extending the life of the nitrogen spring 13.

[0049] The setting of the cylinder 23 enables the ejection time of the flash to be controlled, which is coordinated with the removal action of the main body 300 of the fuel rail forging, realizing an automated production process. This not only improves production efficiency, but also reduces the need for manual intervention and the possibility of errors.

[0050] The use of the floating positioning plate 24 ensures that the placement position of the main body 300 of the fuel rail forging is accurate each time trimming is performed, which helps to achieve a precise trimming effect, avoids over-trimming or burrs, improves the processing quality of the product. The flash after trimming directly falls on the surface of the floating positioning plate 24, and then the cylinder 23 can conveniently eject it, simplifying the waste treatment process, reducing the need for manual cleaning, and improving the cleanliness and safety of the production line.

[0051] The model of the nitrogen spring 13 is NX6600-032.

[0052] Those skilled in the art can understand that the features recited in the various embodiments and / or claims of the present invention can be combined or combined in various ways, even if such combinations or combinations are not explicitly recited in the present invention. In particular, without departing from the spirit and teachings of the present invention, the features recited in the various embodiments and / or claims of the present invention can be combined and combined in various ways. All such combinations and / or combinations fall within the scope of the present invention.

Claims

1. An automatic holding and cutting die holder for an oil rail forging, comprising an upper die holder, a lower die holder and a guiding mechanism, characterized in that: The upper die holder includes an upper template (11), a connecting block (12) is connected to the bottom of the upper template (11), a first base (15) is connected to the bottom of the connecting block (12), a trimming female die (16) is connected to one side of the bottom of the first base (15), a fixing plate (14) is installed on the inner side wall of the first base (15), and a blank holding block (17) located on one side of the trimming female die (16) is installed at the bottom of the fixing plate (14); The lower die holder includes a lower template (21), a cylinder (23) is provided on one side of the top of the lower template (21), a floating positioning plate (24) is connected to the top of the cylinder (23), a second base (26) is arranged on one side of the lower template (21), and a trimming male die (27) is installed on the top of the second base (26); The main body (300) of the oil rail forging is placed on the top of the trimming male die (27) and is located below the blank holding block (17).

2. The automated holding and cutting die holder for an oil rail forging according to claim 1, wherein: A nitrogen spring (13) is fixed to the bottom of the upper template (11), and one end of the bottom of the nitrogen spring (13) is installed on one side of the top of the fixing plate (14).

3. An automatic holding and cutting die carrier for an oil rail forging according to claim 2, characterized in that: Limit bolts (22) are connected to the four corners of the floating positioning plate (24), and the push rod end of the cylinder (23) is fixed to the top of the lower template (21).

4. An automatic holding and cutting die carrier for an oil rail forging according to claim 3, characterized in that: A plurality of first guide posts (25) are fixed to the top of the lower template (21), and guide post holes (2401) for sliding and sleeving on the outer side of the first guide posts (25) are formed on the surface of the floating positioning plate (24).

5. An automatic holding and cutting die carrier for an oil rail forging according to claim 4, characterized in that: An arc (2501) is provided on the outer side of the first guide post (25), and a groove (2402) is provided on the top of the floating positioning plate (24).

6. An automated clamping and cutting die carrier for an oil rail forging according to claim 5, characterized in that: A second internal thread cylindrical pin (102) is connected between the upper template (11) and the connecting block (12), a first internal thread cylindrical pin (101) is connected between the connecting block (12) and the first base (15), and a third internal thread cylindrical pin (103) is connected between the first base (15) and the trimming female die (16).

7. An automated holding and cutting die holder for an oil rail forging according to claim 6, characterized in that: A fourth internal thread cylindrical pin (201) is connected between the lower template (21) and the second base (26).

8. An automated holding and cutting die set for an oil rail forging according to claim 1, characterized in that: The guiding mechanism includes a second guide post (31) and a guide sleeve (32), the outer side of the second guide post (31) is fixed to one side of the lower template (21), and the outer side of the guide sleeve (32) is fixed to one side of the upper template (11).

Images