Bending and pressing forming equipment for die steel plate
By using a combination of transmission belt, motor and L-shaped connecting rod in bending forming equipment, the problems of inconvenience in loading and unloading and lack of limiting functions of existing equipment are solved, convenient loading and stable material return of steel are achieved, and the quality of steel molding is improved.
Patent Information
- Application Number
- CN202411918073.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-24
- Publication Date
- 2025-03-18
AI Technical Summary
The existing bending and forming equipment is simple in design, inconvenient to load and unload, and lacks limiting function for steel, resulting in the reduction of the quality of steel during bending and forming.
A bending and forming equipment for mold steel plates is designed, using a combination of a transmission belt, a motor, a one-shaped connecting rod and a mold seat. The loading function is achieved through the motor to drive the L-shaped connecting rod movement, and the setting of clamps, limiting rods, sliders and push plates is used to limit and withdraw steels of different specifications.
The convenience of loading and unloading and stable support of steel is achieved, ensuring the quality stability of steel during bending and forming.
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Figure CN119634501A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of steel plate processing, in particular to a bending and pressing forming device for a die steel plate. Background Art
[0002] As is known to all, cold bending roll forming equipment is an auxiliary device used for cold bending forming during the steel plate processing process, and has been widely used in the field of steel plate processing; the existing cold bending roll forming equipment includes a base, multiple groups of pillars, a die seat, a mounting frame and a cold bending roller, the bottom end of the base is fixedly connected to the top end of the pillar, the bottom end of the die seat is fixedly connected to the top end of the base, the top end of the die seat is provided with an arc surface, the bottom end of the mounting frame is fixedly connected to the top end of the base, the two ends of the cold bending roller are rotatably mounted on the front and rear walls of the mounting frame respectively, and the cold bending roller is located above the die seat.
[0003] Chinese patent publication number CN212821927U discloses "a cold bending roll forming equipment, which saves manpower and improves the effect and efficiency of cold bending roll forming through its settings; it includes a base, multiple groups of pillars, a die seat, a mounting frame and a cold bending roll, the bottom end of the base is fixedly connected to the top end of the pillar, and the bottom end of the die seat is fixedly connected to the top end of the base; it also includes two groups of roller frames, four groups of positioning bolts, a first motor, two groups of mounting plates, four groups of solenoids, four groups of screws, two groups of guide plates and multiple groups of guide shafts, a groove is provided on the mounting frame, the roller frame is clamped on the groove of the mounting frame, both ends of the cold bending roll can be rotatably mounted on the roller frame, a fin plate is provided on the outer side of the roller frame, the positioning bolt passes through the fin plate of the roller frame and is mounted on the mounting frame, the first motor is fixedly mounted on the roller frame, the front end of the cold bending roll is connected to the output end of the first motor, the bottom end of the mounting plate is fixedly connected to the top end of the base, the solenoid can rotatably pass through the mounting plate, the screw is screwed in the solenoid, and the screw and the guide plate are fixedly connected".
[0004] During the conception process, the applicant searched a large number of patent documents on the patent network. For example, China Patent Publication No. CN212821927U discloses "a cold bending roll forming device". However, since most of the existing bending and pressing devices need to bend and press different types of steel, the design of the bending and pressing devices is relatively simple. When loading and unloading materials, workers are required to manually load and take out materials. At the same time, after loading, there is a lack of a limiting function for the steel, which reduces the quality of the steel during bending and pressing. Therefore, a bending and pressing device for mold steel plates is proposed to solve the above-mentioned problems. Summary of the invention
[0005] 1. Technical issues to be resolved
[0006] In view of the deficiencies in the prior art, the present invention provides a bending and pressing device for a mold steel plate, which solves the problem that most bending and pressing devices are relatively simple in design and inconvenient in loading and unloading.
[0007] (II) Technical solution
[0008] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a bending and pressing device for mold steel plates, comprising a workbench, a driving mechanism is arranged on the upper surface of the workbench, the driving mechanism comprises a motor 1, the motor 1 is fixedly connected to the lower surface of the workbench, the output shaft of the motor 1 is fixedly connected to a transmission shaft, the transmission shaft passes through the workbench and is rotatably connected to the workbench, the transmission shaft is arranged in two groups, a transmission groove is provided on the upper surface of the workbench, a transmission belt is slidably connected to the inner surface of the transmission groove, the two groups of transmission shafts are connected by transmission belt transmission, the upper surface of the workbench is fixedly connected to a die seat, the upper surface of the die seat is provided with a slide groove, the inner surface of the slide groove is slidably connected to an L-shaped connecting rod, and the L-shaped connecting rod is fixedly connected to the upper surface of the transmission belt through a vertical rod.
[0009] Preferably, two groups of L-shaped connecting rods are provided, and the two groups of L-shaped connecting rods are symmetrically arranged with the center line of the workbench as the axis of symmetry. Two groups of slide grooves are provided, and the two groups of slide grooves are symmetrically arranged with the center line of the workbench as the axis of symmetry. The inner surface of the slide groove is slidably connected to the vertical rod of the L-shaped connecting rod.
[0010] Preferably, a connecting plate is fixedly connected to the right surface of the one group of L-shaped connecting rods, and the right surface of the connecting plate is fixedly connected to the left surface of another group of L-shaped connecting rods.
[0011] Preferably, a material return mechanism is provided on the upper surface of the L-shaped connecting rod, and the material return mechanism includes a limit rod, which is fixedly connected to the L-shaped connecting rod, the outer arc surface of the limit rod is slidably connected with a clamping plate, the right surface of the clamping plate is rotatably connected with the connecting rod, the right surface of the connecting rod passes through a connecting rod and is slidably connected to the connecting rod, the left surface of the connecting plate is slidably connected with a slide plate, and the left surface of the slide plate is fixedly connected to the connecting rod.
[0012] Preferably, a buckle is passed through the outer arc surface of the clamping plate and is slidably connected to the buckle, and a slot is formed in a linear array on the outer arc surface of the limiting rod, and the inner surface of the slot is slidably connected to the buckle.
[0013] Preferably, a groove is provided on the front surface of the connecting plate, a push plate is slidably connected to the inner surface of the groove, a movable rod is fixedly connected to the right surface of the push plate, and the movable rod passes through the connecting plate and is slidably connected to the connecting plate.
[0014] Preferably, a U-shaped rod is fixedly connected to the upper surface of the slide plate, a clamping rod is fixedly connected to the lower surface of the U-shaped rod, the clamping rod passes through the connecting plate and is slidably connected to the connecting plate, and the clamping rod passes through the push plate and is slidably connected to the push plate.
[0015] Preferably, a bending and pressing mechanism is provided on the upper surface of the workbench, and the bending and pressing mechanism includes a bending and pressing frame, and the right surface of the bending and pressing frame is fixedly connected to motor 2, and the output shaft of motor 2 is fixedly connected to a bending and pressing roller shaft, and the lower surface of the bending and pressing frame is rotatably connected to a threaded rod, and the threaded rod passes through the workbench and is threadedly connected to the workbench.
[0016] Preferably, a pressure rod penetrates the upper surface of the bending frame, a top plate is fixedly connected to the upper surface of the pressure rod, a telescopic rod is fixedly connected to the lower surface of the top plate, and four groups of the pressure rods are provided.
[0017] (III) Beneficial effects
[0018] Compared with the prior art, the present invention provides a bending and pressing forming device for a die steel plate, which has the following beneficial effects:
[0019] 1. This bending and pressing equipment for mold steel plates utilizes the settings of a transmission belt, a motor, an L-shaped connecting rod and a die seat. The motor can drive the L-shaped connecting rod to move. When loading is required, the steel is placed in the L-shaped connecting rod manually or by a mechanical arm, and the motor is started. The L-shaped connecting rod is driven to move by the transmission belt to realize the loading function, making the entire operation more convenient.
[0020] 2. This kind of bending and pressing equipment for mold steel plates utilizes the settings of a clamp, a limit rod, a slide plate and a push plate. The clamp can limit steels of different specifications by sliding on the limit rod for adjustment. At the same time, after the steel is bent and pressed, the clamp can be rotated to drive the slide plate and the buckle to move upward and disengage from the push plate, and the formed steel can be pushed out by the push plate.
[0021] 3. This kind of bending and pressing equipment for mold steel plates utilizes the setting of a bending frame, a bending roller, a threaded rod and a pressing rod. The top plate is adjusted by a telescopic rod. After the steel is above the die seat, the upper surface of the steel can be fixed to make the steel more stable during bending and pressing. At the same time, the threaded rod can be manually rotated to adjust the distance between the bending roller and the steel according to the thickness of the steel. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Figure 1 This is a schematic diagram of the overall structure of a bending and pressing device for a mold steel plate proposed by the present invention;
[0023] Figure 2 This is a schematic diagram of the overall bottom view structure of a bending and pressing forming device for a mold steel plate proposed by the present invention;
[0024] Figure 3 This is a schematic diagram of the overall structure of a driving mechanism of a bending and pressing forming device for a die steel plate proposed by the present invention;
[0025] Figure 4 A bending and pressing forming device for a die steel plate proposed by the present invention Figure 3 A schematic diagram of the structure enlargement of part A;
[0026] Figure 5 This is a schematic diagram of the overall structure of a connecting plate of a bending and pressing forming device for a mold steel plate proposed by the present invention;
[0027] Figure 6 This is a schematic diagram of the overall structure of a bending and pressing mechanism of a die steel plate bending and pressing forming device proposed by the present invention;
[0028] Figure 7 The present invention is a schematic diagram of the overall structure of a die base of a bending and pressing forming device for a die steel plate proposed by the present invention.
[0029] In the figure: 1. workbench; 2. driving mechanism; 21. motor 1; 22. transmission shaft; 23. transmission belt; 24. die holder; 25. slide groove; 26. L-shaped connecting rod; 27. transmission groove; 28. connecting plate; 3. material withdrawal mechanism; 31. limit rod; 32. clamping plate; 33. connecting rod; 34. slide plate; 35. buckle; 36. clamping groove; 37. groove; 38. push plate; 39. movable rod; 310. U-shaped rod; 311. clamping rod; 4. bending and pressing mechanism; 41. bending and pressing frame; 42. motor 2; 43. bending and pressing roller; 44. threaded rod; 45. pressing rod; 46. top plate; 47. telescopic rod. DETAILED DESCRIPTION
[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0031] See also Figure 1-Figure 7A bending and pressing device for a mold steel plate comprises a workbench 1, a driving mechanism 2 is arranged on the upper surface of the workbench 1, the driving mechanism 2 comprises a motor 21, the motor 21 is fixedly connected to the lower surface of the workbench 1, the output shaft of the motor 21 is fixedly connected to a transmission shaft 22, the transmission shaft 22 passes through the workbench 1 and is rotatably connected to the workbench 1, two groups of transmission shafts 22 are arranged, a transmission groove 27 is opened on the upper surface of the workbench 1, a transmission belt 23 is slidably connected to the inner surface of the transmission groove 27, and two groups of transmission grooves 27 are arranged on the upper surface and the lower surface of the workbench 1 respectively. Through this arrangement, the transmission belt 23 can be wound around the two groups of transmission shafts 22. Through this arrangement, the transmission groove 27 can limit the transmission belt 23. At the same time, the motor A 21 can drive the transmission belt 23 to move, and the two sets of transmission shafts 22 are connected by the transmission belt 23. The upper surface of the workbench 1 is fixedly connected with a die seat 24, and a slide groove 25 is provided on the upper surface of the die seat 24. The inner surface of the slide groove 25 is slidably connected with an L-shaped connecting rod 26. The slide groove 25 can limit the L-shaped connecting rod 26. At the same time, the shape of the slide groove 25 is formed by two sets of rectangles. The L-shaped connecting rod 26 and the vertical rod fixed on the lower surface can move into the slide groove 25 to bring the steel into the upper part of the die seat 24 for die pressing. The L-shaped connecting rod 26 is fixedly connected to the upper surface of the transmission belt 23 through the vertical rod. Two sets of L-shaped connecting rods 26 are provided, and the two sets of L-shaped connecting rods 26 are symmetrically arranged with the center line of the workbench 1 as the symmetry axis. , there are two groups of slide grooves 25, and the two groups of slide grooves 25 are symmetrically arranged with the center line of the workbench 1 as the symmetry axis. The inner surface of the slide groove 25 is slidably connected with the vertical rod of the L-shaped connecting rod 26. The two groups of L-shaped connecting rods 26 can stably support the steel, which is more convenient when transporting materials. The right surface of one group of L-shaped connecting rods 26 is fixedly connected with a connecting plate 28, and the right surface of the connecting plate 28 is fixedly connected to the left surface of the other group of L-shaped connecting rods 26. The two groups of L-shaped connecting rods 26 are fixed by the connecting plate 28, which is convenient for the two groups of L-shaped connecting rods 26 to move at the same time. By utilizing the arrangement of the transmission belt 23, the motor 21, the L-shaped connecting rod 26 and the die seat 24, the motor 21 can drive the L-shaped connecting rod 26 to move. When feeding is needed, the motor 21 is started, and the L-shaped connecting rod 26 is driven to move by the transmission belt 23 to realize the feeding function, making the whole operation more convenient. The upper surface of the L-shaped connecting rod 26 is provided with a material return mechanism 3, and the material return mechanism 3 includes a limit rod 31, and the limit rod 31 is fixedly connected to the L-shaped connecting rod 26. The outer arc surface of the limit rod 31 is slidably connected with a clamping plate 32, and the right surface of the clamping plate 32 is rotatably connected with the connecting rod 33, and the right surface of the connecting rod 33 is penetrated by the connecting rod 33 and is slidably connected with the connecting rod 33, and the left surface of the connecting plate 28 is slidably connected with a slide plate 34, and the left surface of the slide plate 34 is fixedly connected with the connecting rod 33. By sliding the clamping plate 32 on the limit rod 31, the function of fixing steel materials of different specifications can be realized.The outer arc surface of the clamping plate 32 is penetrated by a buckle 35 and is slidably connected to the buckle 35. The outer arc surface of the buckle 35 is sleeved with a spring. At the same time, the buckle 35 is fixed to one end of the spring, and the clamping plate 32 is fixed to the other end of the spring. Through this arrangement, the buckle 35 is guaranteed to be more stable in the slot 36. The outer arc surface of the limit rod 31 is provided with a slot 36 in a linear array. The inner surface of the slot 36 is slidably connected to the buckle 35. Through the cooperation of the buckle 35 and the slot 36, the lateral and longitudinal movement of the clamping plate 32 can be limited. At the same time, it can be ensured that the clamping plate 32 will not rotate. The front surface of the connecting plate 28 is provided with a groove 37. The inner surface of the groove 37 is slidably connected to a push plate 38. The right surface of the push plate 38 is fixedly connected to a movable rod 39. A spring is sleeved on the outer arc surface, and a movable rod 39 is fixed to one end of the spring, and a connecting plate 28 is fixed to the other end of the spring. Through this arrangement, after the push plate 38 loses its limit, the push plate 38 can be bounced toward the direction of the die seat 24 by the elastic force of the spring. The movable rod 39 penetrates the connecting plate 28 and is slidably connected to the connecting plate 28. A U-shaped rod 310 is fixedly connected to the upper surface of the slide plate 34, and a clamping rod 311 is fixedly connected to the lower surface of the U-shaped rod 310. The clamping rod 311 penetrates the connecting plate 28 and is slidably connected to the connecting plate 28. The clamping rod 311 penetrates the push plate 38 and is slidably connected to the push plate 38. The clamping rod 311 penetrates the connecting plate 28 and the push plate 38 at the same time, so that the clamping rod 311 can limit the push plate 38. When the steel is bent and pressed. , to ensure that the push plate 38 will not push the steel away, by using the settings of the clamping plate 32, the limiting rod 31, the sliding plate 34 and the pushing plate 38, after the clamping plate 32 is adjusted by sliding on the limiting rod 31, after the steel is bent and pressed, the sliding plate 34 and the buckle 35 can be driven to move upward by rotating the clamping plate 32 and disengage from the pushing plate 38, and the formed steel is pushed out by the pushing plate 38. A bending mechanism 4 is provided on the upper surface of the workbench 1, and the bending mechanism 4 includes a bending frame 41, and a motor 42 is fixedly connected to the right surface of the bending frame 41, and a bending roller shaft 43 is fixedly connected to the output shaft of the motor 42, and a threaded rod 44 is rotatably connected to the lower surface of the bending frame 41, and the threaded rod 44 passes through the workbench 1 and is threadedly connected to the workbench 1, and two groups of threaded rods 44 are provided, and at the same time, the two The threaded rods 44 are connected in a transmission manner. Through this arrangement, rotating the threaded rods 44 on one side can drive the other threaded rods 44 to rotate, thereby stably making the bending frame 41 move up and down. A pressure rod 45 runs through the upper surface of the bending frame 41. The upper surface of the pressure rod 45 is fixedly connected to a top plate 46. The lower surface of the top plate 46 is fixedly connected to a telescopic rod 47. Four groups of pressure rods 45 are provided. A limiting mechanism is provided on the telescopic rod 47. The limiting mechanism includes a spring buckle. At the same time, the outer arc surface of the telescopic rod 47 is provided with a limiting groove in a linear array. Through this arrangement, the top plate 46 can be controlled to move up and down. The up and down movement of the top plate 46 can drive the pressure rod 45 to move up and down, thereby realizing the function of fixing steels of different sizes.By means of the bending frame 41, the bending roller shaft 43, the threaded rod 44 and the pressing rod 45, the upper surface of the steel material can be fixed after the steel material is above the die holder 24, so that the steel material is more stable during bending and pressing. The threaded rod 44 can be manually rotated to adjust the distance between the bending roller shaft 43 and the steel material according to the thickness of the steel material.
[0032] Working principle: when the steel needs to be bent and pressed, after placing the steel on the upper surface of the L-shaped connecting rod 26, according to the width of the steel, manually pull the buckle 35 out of the slot 36, move the clamp plate 32 on the limit rod 31, and make the two sets of clamp plates 32 close to the two sides of the steel, then reinsert the buckle 35 into the slot 36, start the motor 21, and the motor 21 drives the transmission shaft 22 to rotate clockwise, and the transmission belt 23 drives the L-shaped connecting rod 26 to move forward. At the same time, before the L-shaped connecting rod 26 moves toward the direction of the bending frame 41, according to the thickness of the steel plate, manually rotate the threaded rod 44 to drive the bending roller shaft 4 through the threaded rod 44. 3 moves up and down, so that the bending roller 43 moves to the top of the steel plate, the L-shaped connecting rod 26 moves into the slide groove 25, and the pressing rod 45 is made to be in close contact with the upper surface of the steel by adjusting the telescopic rod 47. After pressing the steel, the motor 2 42 is started to drive the bending roller to process the steel. After the processing is completed, the buckle 35 is taken out of the slot 36, and the clamping plate 32 is rotated counterclockwise. The clamping plate 32 drives the slide plate 34 to move upward through the connecting rod 33 and the movable rod 39. After the slide plate 34 drives the clamping rod 311 to disengage from the push plate 38 through the U-shaped rod 310, the movable rod 39 drives the push plate 38 to push the steel from the die seat 24 through the elastic force of the spring, thereby realizing the whole process of pushing the die.
[0033] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.
Claims
1. A bending and press forming device for a die steel plate, comprising a workbench (1), characterized in that: The upper surface of the workbench (1) is provided with a driving mechanism (2), the driving mechanism (2) comprising a motor (21), the motor (21) being fixedly connected to the lower surface of the workbench (1), the output shaft of the motor (21) being fixedly connected to a transmission shaft (22), the transmission shaft (22) passing through the workbench (1) and being rotatably connected to the workbench (1), the transmission shaft (22) being provided with two groups, the upper surface of the workbench (1) being provided with a transmission groove (27), The inner surface of the transmission groove (27) is slidably connected with a transmission belt (23), and the two groups of transmission shafts (22) are transmission-connected via the transmission belt (23); the upper surface of the workbench (1) is fixedly connected with a die seat (24), and a slide groove (25) is provided on the upper surface of the die seat (24); the inner surface of the slide groove (25) is slidably connected with an L-shaped connecting rod (26), and the L-shaped connecting rod (26) is fixedly connected to the upper surface of the transmission belt (23) via a vertical rod.
2. The bending and pressing forming equipment for mold steel plates according to claim 1, characterized in that: The L-shaped connecting rods (26) are provided in two groups, and the two groups of L-shaped connecting rods (26) are symmetrically arranged with the center line of the workbench (1) as the symmetry axis. The slide grooves (25) are provided in two groups, and the two groups of slide grooves (25) are symmetrically arranged with the center line of the workbench (1) as the symmetry axis. The inner surface of the slide groove (25) is slidably connected to the vertical rod of the L-shaped connecting rod (26).
3. The bending and pressing equipment for mold steel plates according to claim 2, characterized in that: A connecting plate (28) is fixedly connected to the right surface of one group of L-shaped connecting rods (26), and a right surface of the connecting plate (28) is fixedly connected to the left surface of another group of L-shaped connecting rods (26).
4. The bending and pressing equipment for mold steel plates according to claim 3 is characterized in that: The upper surface of the L-shaped connecting rod (26) is provided with a material return mechanism (3), and the material return mechanism (3) includes a limit rod (31), and the limit rod (31) is fixedly connected to the L-shaped connecting rod (26); the outer arc surface of the limit rod (31) is slidably connected to a clamping plate (32); the right surface of the clamping plate (32) is rotatably connected to a connecting rod (33); the right surface of the connecting rod (33) passes through the connecting rod (33) and is slidably connected to the connecting rod (33); the left surface of the connecting plate (28) is slidably connected to a slide plate (34), and the left surface of the slide plate (34) is fixedly connected to the connecting rod (33).
5. The bending and pressing equipment for mold steel plates according to claim 4, characterized in that: The outer arc surface of the clamping plate (32) is penetrated by a buckle (35) and is slidably connected to the buckle (35); the outer arc surface of the limiting rod (31) is provided with a clamping groove (36) in a linear array; the inner surface of the clamping groove (36) is slidably connected to the buckle (35).
6. The bending and pressing equipment for mold steel plates according to claim 5, characterized in that: The front surface of the connecting plate (28) is provided with a groove (37), the inner surface of the groove (37) is slidably connected to a push plate (38), the right surface of the push plate (38) is fixedly connected to a movable rod (39), and the movable rod (39) passes through the connecting plate (28) and is slidably connected to the connecting plate (28).
7. The bending and pressing equipment for mold steel plates according to claim 6, characterized in that: The upper surface of the slide plate (34) is fixedly connected to a U-shaped rod (310), the lower surface of the U-shaped rod (310) is fixedly connected to a clamping rod (311), the clamping rod (311) passes through the connecting plate (28) and is slidably connected to the connecting plate (28), and the clamping rod (311) passes through the push plate (38) and is slidably connected to the push plate (38).
8. The bending and pressing equipment for mold steel plates according to claim 7, characterized in that: The upper surface of the workbench (1) is provided with a bending and pressing mechanism (4), and the bending and pressing mechanism (4) comprises a bending and pressing frame (41), the right surface of the bending and pressing frame (41) is fixedly connected to a second motor (42), the output shaft of the second motor (42) is fixedly connected to a bending and pressing roller shaft (43), and the lower surface of the bending and pressing frame (41) is rotatably connected to a threaded rod (44), and the threaded rod (44) passes through the workbench (1) and is threadedly connected to the workbench (1).
9. The bending and pressing equipment for mold steel plates according to claim 8, characterized in that: A pressure rod (45) passes through the upper surface of the bending frame (41), a top plate (46) is fixedly connected to the upper surface of the pressure rod (45), a telescopic rod (47) is fixedly connected to the lower surface of the top plate (46), and four groups of pressure rods (45) are provided.
Citation Information
Patent Citations
Cold bending and rolling forming equipment
CN212821927U