CN217570510U - A quick forming die for bullet strip production - Google Patents
A quick forming die for bullet strip production Download PDFInfo
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- CN217570510U CN217570510U CN202221918987.1U CN202221918987U CN217570510U CN 217570510 U CN217570510 U CN 217570510U CN 202221918987 U CN202221918987 U CN 202221918987U CN 217570510 U CN217570510 U CN 217570510U
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Abstract
The utility model discloses a quick forming die for bullet strip production, including frame, terrace die, go up reference column, lower reference column, center push arm, upside push arm, avris push arm, buffer board, elastic component, push pedal, upside gyro wheel, avris gyro wheel, locating plate and stopper. The female die is fixedly installed on the rack, the male die is located on one side of the female die, a groove matched with the male die is formed in the end face, facing the male die, of the female die, and two upper positioning columns and two lower positioning columns are installed in the groove in a sliding mode. Bending the bar material through the matching of the central push arm, the two upper push arms and the two lateral push arms, pressing the bent bar material into the female die through the male die, and enabling the upper positioning column and the lower positioning column to be matched with the female die to contract so as to be away from the groove, so that the male die punches the bent bar material to obtain the elastic strip; through improving cubic stamping forming into the shaping of once hot bending, reduce bullet strip shaping time and required mould, reduce the human cost, reduce bullet strip manufacturing cost, improve bullet strip production efficiency.
Description
Technical Field
The utility model relates to an bullet strip production technical field, especially a quick forming die for bullet strip production.
Background
In railway tracks, many different railway track fasteners are used to assist in the installation, fixing and connection of the rails, where a spring-loaded fastener is a very common type of fastener and a railway track spring-loaded member refers to a part of a fastening device for a rail and a tie having a resilient retaining member.
The W-shaped elastic strip is generally completed by 3 stamping processes, and the patent with the publication number of CN207941854U discloses a novel automatic forming system for railway track elastic strips, which comprises a first elastic strip pressing process device, a second elastic strip pressing process device and a third elastic strip pressing process device, wherein a first elastic strip transfer mechanism is arranged between the first elastic strip pressing process device and the second elastic strip pressing process device, and a second elastic strip transfer mechanism is arranged between the second elastic strip pressing process device and the third elastic strip pressing process device. Compared with the prior art, the technical effect of the utility model is that, through setting up first bullet strip transfer mechanism between first bullet strip suppression process equipment and second bullet strip suppression process equipment, set up second bullet strip transfer mechanism between second bullet strip suppression process equipment and the third bullet strip suppression process equipment, realize the automation that the process shifted, simultaneously, second bullet strip suppression process can not produce too big tensile force to the bullet strip when buckling, can not make the bullet strip by tensile attenuation.
Above-mentioned scheme is equipped with first bullet strip suppression process equipment, second bullet strip suppression process equipment and third bullet strip suppression process equipment, adopts 3 stamping process completions, through the ascending punching press of buckling and the plane punching press of twice length direction, all need shift out the back with the blank after each stamping process is accomplished and is carrying out the punching press of next time, and the course of working is comparatively complicated, can be at the blank through the last unloading in-process waste time of 3 removals, influences production efficiency.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the problem, a quick forming die for producing elastic strips is designed.
The technical scheme of the utility model is that the rapid forming die for producing the elastic strip comprises a frame, a male die, a female die, an upper positioning column, a lower positioning column, a central push arm, an upper push arm and a lateral push arm; the female die is fixedly arranged on the rack, the male die is positioned on one side of the female die, a groove matched with the male die is arranged on the end face of the female die, which faces the male die, a central push arm is positioned on a vertical reference surface of the female die and can move in the vertical direction, two upper positioning columns and two lower positioning columns are arranged in the groove in a sliding manner, the upper positioning columns and the lower positioning columns are symmetrically arranged on two sides of the axis of the central push arm, the upper positioning columns are positioned above the lower positioning columns, the upper positioning columns and the lower positioning columns are horizontally arranged in parallel, the distance between the upper positioning columns is smaller than that between the lower positioning columns, one ends of the upper positioning columns and the lower positioning columns, which are far away from the male die, extend out of the female die and are provided with a buffer plate, and the other end of the buffer plate is connected with a push plate capable of linearly transversely moving towards the female die through an elastic piece; the two upper side push arms are symmetrically arranged on two sides of the central push arm and can move in the vertical direction, and the two side push arms are symmetrically arranged on two sides of the central push arm and can move in the horizontal direction.
Furthermore, the lower end of the upper side push arm is provided with an upper side roller wheel, the upper side roller wheel is positioned outside the lower positioning column, and the motion track of the upper side roller wheel is from the upper part of the groove to the side of the lower positioning column.
Furthermore, the opposite ends of the side push arms are provided with side rollers, the side rollers are located below the lower positioning columns, and the motion tracks of the side rollers are from the outer sides of the female dies to the positions under the lower positioning columns.
Furthermore, positioning plates for positioning the bar stock are fixed on the rack, the positioning plates are symmetrically arranged on two sides of the female die, and a limiting block is fixed at one end, far away from the rack, of each positioning plate.
Furthermore, an inclined plane is arranged on the inner side of the limiting block.
Furthermore, the bottom end face of the central pushing arm is a semicircular arc face.
Furthermore, the rack is provided with a middle guide sleeve and a side guide sleeve of an upper side guide sleeve which are fixed with the rack, the center push arm is slidably mounted in the middle guide sleeve, the upper side guide sleeve is in one-to-one correspondence with the upper side push arms, the upper side push arms are slidably mounted in the upper side guide sleeve corresponding to the upper side push arms, the side guide sleeve is in one-to-one correspondence with the side push arms, and the side push arms are slidably mounted on the side push arms corresponding to the side push arms.
The beneficial effects of the technical scheme are as follows: bending the bar material through the matching of the central push arm, the two upper push arms and the two lateral push arms, pressing the bent bar material into the female die through the male die, and enabling the upper positioning column and the lower positioning column to be matched with the female die to contract so as to be away from the groove, so that the male die punches the bent bar material to obtain the elastic strip; through improving cubic stamping forming into the shaping of once hot bending, reduce bullet strip shaping time and required mould, reduce the human cost, reduce bullet strip manufacturing cost, improve bullet strip production efficiency.
Drawings
FIG. 1 is a schematic view of the present invention;
fig. 2 is a first working state diagram of the present invention;
FIG. 3 is a second working state diagram of the present invention;
fig. 4 is a third working state diagram of the present invention;
fig. 5 is a fourth working state diagram of the present invention;
fig. 6 is a side cross-sectional view of the present invention in the state of fig. 5;
fig. 7 is a fifth operation state diagram of the present invention from the perspective of fig. 6;
fig. 8 is a sixth view of the present invention in the operating state from the perspective of fig. 6;
fig. 9 is a seventh working state diagram of the present invention from the perspective of fig. 6;
fig. 10 is a top partial schematic view of the present invention;
in the figure, 1, a frame; 2. a male die; 3. a female die; 4. an upper positioning column; 5. a lower positioning column; 6. a center push arm; 7. an upper side push arm; 8. a side push arm; 9. a groove; 10. a buffer plate; 11. an elastic member; 12. pushing a plate; 13. a bar stock; 14. an upper roller; 15. side rollers; 16. positioning a plate; 17. a limiting block; 18. a middle guide sleeve; 19. an upper guide sleeve; 20. a side guide sleeve.
Detailed Description
In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.
As shown in fig. 1 to 10, a rapid prototyping die for elastic strip production comprises a frame 1, a male die 2, a female die 3, an upper positioning column 4, a lower positioning column 5, a central push arm 6, an upper side push arm 7 and a side push arm 8; the female die 3 is fixedly installed on the rack 1, the male die 2 is located on one side of the female die 3, a groove 9 matched with the male die 2 is formed in the end face, facing the male die 2, of the female die 3, the central push arm 6 is located on a vertical reference surface of the female die 3 and can move in the vertical direction, two upper positioning columns 4 and two lower positioning columns 5 are installed in the groove 9 in a sliding mode, the upper positioning columns 4 and the lower positioning columns 5 are symmetrically arranged on two sides of the axis of the central push arm 6, the upper positioning columns 4 are located above the lower positioning columns 5, the upper positioning columns 4 and the lower positioning columns 5 are horizontally arranged in parallel, the distance between the upper positioning columns 4 is smaller than that between the lower positioning columns 5, one ends, far away from the male die 2, of the upper positioning columns 4 and the lower positioning columns 5 extend out of the female die 3 and are provided with a buffer plate 10, the other end of the buffer plate 10 is connected with a push plate 12 capable of linearly transversely moving towards the female die 3 through an elastic piece 11, the elastic piece 11 is selected from a plurality of compression springs; the two upper side push arms 7 are symmetrically arranged on two sides of the central push arm 6 and can move in the vertical direction, and the two side push arms 8 are symmetrically arranged on two sides of the central push arm 6 and can move in the horizontal direction; the male die 2, the central push arm 6, the upper push arm 7 and the side push arm 8 are connected with corresponding hydraulic cylinders and driven to move through the hydraulic cylinders.
Specifically, the elastic strip is made of a bar 13, the bar 13 needs to be heated, the heated bar 13 is placed on the two upper positioning columns 4, and the center of the bar 13 is ensured to be located under the central push arm 6; after the central push arm 6 moves downwards, the bar 13 is pressed on the upper positioning columns 4, so that the bar 13 is bent, and the middle part of the bar 13 forms a U shape between the two upper positioning columns 4 under the action of the central push arm 6; then the two upper side push arms 7 move downwards, the bar 13 is pressed downwards to enable the bar 13 to bend downwards around the outer side of the upper positioning column 4, and the lower end of the bar 13 is lower than the lower positioning column 5 and the side push arm 8 after being bent; then the two side push arms 8 move oppositely to push the bar 13, so that the bar 13 bends towards the middle around the outer side of the lower positioning column 5, and the bar 13 can enter the groove 9 after being bent; after the central push arm 6, the upper push arm 7 and the lateral push arm 8 are retracted and reset, the male die 2 linearly moves towards the female die 3, the male die 2 is firstly contacted with the upper positioning column 4 and the lower positioning column 5, the upper positioning column 4 and the lower positioning column 5 are pushed to move towards the push plate 12, the elastic part 11 is compressed, the upper positioning column 4 and the lower positioning column 5 are gradually retracted into the groove 9, when the male die 2 is contacted with the bent bar 13 and presses the bent bar 13 in the groove 9, the hydraulic cylinder is contracted to drive the push plate 12 to be far away from the female die 3, and further drive the upper positioning column 4 and the lower positioning column 5 to be far away from the male die 2 until the upper positioning column 4 and the lower positioning column 5 are moved out of the groove 9, so as to avoid influencing the male die 2 to punch the bent bar 13, when a proximity switch for detecting the position of the buffer plate 10 is installed on the rack 1, the position of the buffer plate 10 is detected, and the time point that the convex die 2 pushes the upper positioning column 4, the lower positioning column 5 and the buffer plate 10 to tightly press the bent bar 13 in the groove 9 can be judged, or when the proximity switch for detecting the position of the convex die 2 is installed on the rack 1, a signal of the convex die 2 can be detected when the convex die 2 tightly presses the bent bar 13 in the groove 9, or a hydraulic cylinder for driving the convex die 2 is selected as a servo hydraulic cylinder, the advancing position of the convex die 2 is accurately controlled, when the convex die 2 moves to a preset position for tightly pressing the bent bar 13 in the groove 9, the stretching of the hydraulic cylinder is firstly paused, and the convex die 2 is stopped; after the upper positioning column 4 and the lower positioning column 5 are contracted, the male die 2 continues to advance to punch the bent bar 13, and the W elastic strip is manufactured after the forming is finished; the male die 2 retreats and resets, the push plate 12 advances and resets, the upper positioning column 4 and the lower positioning column 5 are driven to enter the groove 9 again, and the elastic strip is pushed out of the groove 9.
In this embodiment, when the upper pushing arm 7 pushes down the bar 13, the upper pushing arm moves relative to the bar 13 to rub the bar 13, which causes an excessive resistance and affects the quality of the bar 13, so that the upper rollers 14 are mounted at the lower end of the upper pushing arm 7, the upper rollers 14 are located outside the lower positioning column 5, and the movement track of the upper rollers 14 is from the upper side of the groove 9 to the side of the lower positioning column 5. The upper side roller 14 is directly contacted with the bar 13, so that the friction motion can be converted into rolling motion, the resistance for pressing down the bar 13 is reduced, the bar 13 cannot be damaged, and the quality of the elastic strip is improved.
In this embodiment, when the side push arm 8 pushes the bar 13 to bend the bar 13, the side push arm and the bar 13 move relatively to rub against each other, so that the resistance is too large, and the quality of the bar 13 is also affected, therefore, side rollers 15 are installed at opposite ends of the side push arm 8, the side rollers 15 are located below the lower positioning column 5, and the movement track of the side rollers 15 is from the outside of the female die 3 to the position under the lower positioning column 5. The side roller 15 is directly contacted with the bar 13, so that the friction motion can be converted into rolling motion, the resistance for bending the bar 13 is reduced, the bar 13 cannot be damaged, and the quality of the elastic strip is improved.
In the embodiment, in order to position the bar 13 horizontally, the bar 13 is centered on the upper positioning column 4, as shown in fig. 1-10, positioning plates 16 for positioning the bar 13 are fixed on the frame 1, the positioning plates 16 are symmetrically arranged on two sides of the female die 3, and a limiting block 17 is fixed at one end of the positioning plate 16 away from the frame 1. Bar 13 propelling movement is located between two stopper 17 on two last reference column 4 and with the locating rack laminating back, stopper 17 restriction bar 13 axial displacement fixes a position bar 13 horizontal direction through stopper 17 to improve positioning accuracy and product quality.
In this embodiment, in order to facilitate the bar 13 to enter between the limiting blocks 17 and attach to the positioning plate 16, as shown in fig. 10, an inclined surface is provided inside the limiting block 17. The inclined surface has a guiding function, so that the bar 13 can be guided to the front end surface of the positioning plate 16, and the bar is conveniently attached to the positioning plate 16.
In this embodiment, in order to facilitate the central push arm 6 to bend the bar 13 into a U shape and ensure the smoothness of the bent portion of the bar 13, the bottom end surface of the central push arm 6 is set to be a semi-circular arc surface. After the semicircular arc surface bends the bar 13, the U-shaped bottom of the bar 13 is bent into a smooth transition structure matched with the semicircular arc surface in a fitting manner.
In this embodiment, in order to enable the center push arm 6, the upper push arm 7 and the side guide sleeve 20 to move smoothly according to a predetermined path, the rack 1 is provided with a middle guide sleeve 18 and a side guide sleeve 20 of an upper guide sleeve 19 fixed thereto, the center push arm 6 is slidably mounted in the middle guide sleeve 18, the upper guide sleeves 19 correspond to the upper push arms 7 one by one, the upper push arms 7 are slidably mounted in the upper guide sleeves 19 corresponding thereto, the side guide sleeves 20 correspond to the side push arms 8 one by one, and the side push arms 8 are slidably mounted on the side push arms 8 corresponding thereto. The middle guide has a guiding function on the central push arm 6, the upper side guide sleeve 19 has a guiding function on the upper side push arm 7, and the side guide sleeve 20 has a guiding function on the side push arm 8.
And (3) forming the elastic strip:
s1, as shown in figure 1, a heated elastic strip raw material, namely a bar 13, is placed on two upper positioning columns 4 and between two limiting blocks 17 and is attached to a positioning frame, the upper positioning columns 4 position the bar 13 in the vertical direction, and a positioning plate 16 and the limiting blocks 17 position the bar 13 in the horizontal direction;
s2, as shown in FIG. 2, the central push arm 6 moves downwards to force the bar 13 to press the upper positioning posts 4, the semi-circular arc surface of the bottom end surface of the central push arm 6 presses the bar 13 downwards between the two upper positioning posts 4 to bend the bar 13, the upper side roller 14 contacts with the tilting parts of the two ends of the bar 13 to limit the bar 13 to tilt continuously, and the middle part of the bar 13 forms a U shape between the two upper positioning posts 4 under the action of the central push arm 6;
s3, as shown in the figure 3, the two upper side push arms 7 move downwards, the upper side rollers 14 are in contact with the bar 13, the bar 13 is pressed downwards to enable the bar 13 to bend downwards around the outer side of the upper positioning column 4 until the upper side rollers 14 move to the side of the lower positioning column 5, and at the moment, the bar 13 is M-shaped;
s4, as shown in the figure 4, the two side push arms 8 move oppositely, the side idler wheel 15 pushes the bar 13 to enable the bar 13 to bend towards the middle around the outer side of the lower positioning column 5 until the side idler wheel 15 moves to the position near the position right below the lower positioning column 5, at the moment, the bending step of the bar 13 is completed, the size of the bent bar 13 is smaller than that of the groove 9, and the bent bar 13 is separated from the positioning plate 16 and can enter the groove 9;
s5, as shown in the figures 5 and 6, the central push arm 6, the upper side push arm 7 and the side push arm 8 are retracted and reset;
s6, as shown in FIG. 7, the male die 2 moves forward towards the female die 3, the male die 2 is firstly contacted with the upper positioning column 4 and the lower positioning column 5, the upper positioning column 4 and the lower positioning column 5 are pushed to move towards the push plate 12, the elastic part 11 is compressed, and the upper positioning column 4 and the lower positioning column 5 gradually retract into the groove 9;
s7, as shown in FIG. 8, when the male die 2 is in contact with the bent bar 13 and the bent bar 13 is tightly pressed in the groove 9, the hydraulic cylinder contracts to drive the push plate 12 to be away from the female die 3, so as to drive the upper positioning column 4 and the lower positioning column 5 to be away from the male die 2 until the upper positioning column 4 and the lower positioning column 5 are moved out of the groove 9, and the bent bar 13 is prevented from being punched by the male die 2;
s8, as shown in the figure 9, after the upper positioning column 4 and the lower positioning column 5 are contracted, the male die 2 continues to advance, and the bent bar 13 is punched to complete forming to obtain the W elastic strip;
s9, the male die 2 retreats and resets, the push plate 12 advances and resets to drive the upper positioning column 4 and the lower positioning column 5 to enter the groove 9 again, the elastic strip is pushed out of the groove 9, and the elastic strip naturally falls down.
Through improving cubic stamping forming into the shaping of once hot bending, reduce bullet strip shaping time and required mould, reduce the human cost, reduce bullet strip manufacturing cost, improve bullet strip production efficiency.
The above examples only represent some embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the concept of the present invention, several variations and modifications can be made, which all fall within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature "under," "beneath," and "under" a second feature may be directly under or obliquely under the second feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.
Above-mentioned technical scheme has only embodied the utility model discloses technical scheme's preferred technical scheme, some changes that this technical field's technical personnel probably made to some parts wherein have all embodied the utility model discloses a principle belongs to within the protection scope of the utility model.
Claims (7)
1. A rapid forming die for elastic strip production comprises a machine frame (1), and is characterized by further comprising a male die (2), a female die (3), an upper positioning column (4), a lower positioning column (5), a central push arm (6), an upper side push arm (7) and a side push arm (8); the die (3) is fixedly arranged on the rack (1), the male die (2) is positioned on one side of the female die (3), a groove (9) matched with the male die (2) is formed in the end face, facing the male die (2), of the female die (3), the central push arm (6) is positioned on the vertical reference surface of the female die (3) and can move in the vertical direction, two upper positioning columns (4) and two lower positioning columns (5) are arranged in the groove (9) in a sliding mode, the upper positioning columns (4) and the lower positioning columns (5) are symmetrically arranged on two sides of the axis of the central push arm (6), the upper positioning columns (4) are positioned above the lower positioning columns (5), the upper positioning columns (4) and the lower positioning columns (5) are horizontally arranged in parallel, the distance between the upper positioning columns (4) is smaller than that between the lower positioning columns (5), one ends, far away from the male die (2), of the upper positioning columns (4) and the lower positioning columns (5) extend out of the female die (3) to form a buffer plate (10), and the other end of the buffer plate (10) is connected with a push plate (12) which can move towards a straight line in a transverse mode through an elastic piece (11); the two upper side push arms (7) are symmetrically arranged on two sides of the central push arm (6) and can move in the vertical direction, and the two side push arms (8) are symmetrically arranged on two sides of the central push arm (6) and can move in the horizontal direction.
2. The rapid prototyping die for producing elastic strips as claimed in claim 1, wherein the lower ends of the upper side pushing arms (7) are respectively provided with an upper side roller (14), the upper side rollers (14) are positioned outside the lower positioning columns (5), and the movement tracks of the upper side rollers (14) are from the upper part of the grooves (9) to the side of the lower positioning columns (5).
3. The rapid prototyping die for the production of elastic strips as set forth in claim 1, wherein the opposite ends of the side pushing arms (8) are respectively provided with a side roller (15), the side rollers (15) are located below the lower positioning column (5), and the movement track of the side rollers (15) is from the outer side of the female die (3) to the position right below the lower positioning column (5).
4. The rapid prototyping die for the production of the elastic strip as claimed in claim 1, wherein a positioning plate (16) for positioning the bar stock (13) is fixed on the frame (1), the positioning plate (16) is symmetrically arranged at two sides of the female die (3), and a limiting block (17) is fixed at one end of the positioning plate (16) far away from the frame (1).
5. The rapid prototyping die for producing elastic strips as set forth in claim 4, wherein an inclined surface is arranged on the inner side of the limiting block (17).
6. The rapid prototyping die for the production of spring strips as set forth in claim 1, wherein the bottom end face of the central pushing arm (6) is a semicircular arc surface.
7. The rapid prototyping die for the production of elastic strips as set forth in claim 1, wherein the frame (1) is provided with a middle guide sleeve (18) fixed with the frame and a side guide sleeve (20) of an upper side guide sleeve (19), the center push arm (6) is slidably mounted in the middle guide sleeve (18), the upper side guide sleeve (19) is in one-to-one correspondence with the upper side push arm (7), the upper side push arm (7) is slidably mounted in the upper side guide sleeve (19) corresponding to the upper side push arm, the side guide sleeve (20) is in one-to-one correspondence with the side push arm (8), and the side push arm (8) is slidably mounted on the side push arm (8) corresponding to the side push arm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221918987.1U CN217570510U (en) | 2022-07-25 | 2022-07-25 | A quick forming die for bullet strip production |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221918987.1U CN217570510U (en) | 2022-07-25 | 2022-07-25 | A quick forming die for bullet strip production |
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| CN217570510U true CN217570510U (en) | 2022-10-14 |
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| CN202221918987.1U Active CN217570510U (en) | 2022-07-25 | 2022-07-25 | A quick forming die for bullet strip production |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116422744A (en) * | 2023-06-13 | 2023-07-14 | 湖南益格特钢科技有限公司 | Special-shaped steel pipe forming die |
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2022
- 2022-07-25 CN CN202221918987.1U patent/CN217570510U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116422744A (en) * | 2023-06-13 | 2023-07-14 | 湖南益格特钢科技有限公司 | Special-shaped steel pipe forming die |
| CN116422744B (en) * | 2023-06-13 | 2023-08-18 | 湖南益格特钢科技有限公司 | Special-shaped steel pipe forming die |
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