New eccentric forming equipment for curved leg joints

Abstract

The present invention relates to novel curved leg joint forming equipment, comprising a frame and a workbench arranged on the frame, on which at least one group of front end fixed molds arranged at intervals are arranged in sequence: for fixing the unexpanded end of the curved leg joint; a middle clamping and flattening mechanism: for flattening the middle part of the curved leg joint; at least one group of rear end fixed molds arranged at intervals and opposite to the front end fixed mold: for fixing the expanded end of the curved leg joint; a high-pressure core pump mechanism, which is driven into the expanded end of the curved leg joint fixed in the rear end fixed mold and extends to the middle part of the curved leg joint, or is driven into the unexpanded end of the curved leg joint and extends to the middle part of the curved leg joint; an eccentricity guiding mechanism: when the front end fixed mold and the rear end fixed mold fix the curved leg joint, the high-pressure core pump mechanism is driven into the expanded end of the curved leg joint, and the middle clamping and flattening mechanism clamps the middle part of the curved leg joint, the rear end fixed mold and the high-pressure core pump mechanism are lifted up or pressed down as a whole, thereby realizing the eccentricity guiding of the curved leg joint.

Description

Technical Field

[0001] The invention relates to the field of curved leg joint forming equipment, in particular to a novel curved leg joint eccentric forming equipment. Background Art

[0002] At present, the number of sanitary products is increasing day by day. The quality of the curved foot, as the main accessory of the faucet, directly affects the overall life of the faucet. The curved foot plays the role of connecting the pipe and the faucet. Under normal installation, the curved foot bears the weight of the entire faucet. After a long period of thermal expansion and contraction, contact with alkaline substances and material oxidation, the life of the curved foot is shortened, thereby affecting the life of the entire faucet. In order to improve the strength and corrosion resistance of the curved foot, the existing technology also uses stainless steel to make the curved foot. The casting process of the stainless steel curved foot is: press molding - wax mold pressing - wax mold assembly - dip coating - sanding - hardening and drying (repeated many times) - dewaxing - modeling - roasting - burning and pouring - sanding - cleaning. Due to the defects of the process, the finished curved foot has surface pits, black spots, shrinkage, depressions, oxide sand inclusions, island-shaped protrusions and other defects, which not only affects the appearance of the product, but also reduces the performance and yield of the product. Since the molecular structure of the cast product itself is not compact, the organization is loose, and the material contains many impurities, local rust or rust spots are prone to appear on the surface. In addition, the existing method of casting the curved foot is difficult to process, the hardness of the cast curved foot is relatively high, and the tool wears severely, resulting in a relatively high price. Therefore, in order to avoid the shortcomings of the prior art, a method for forming a curved leg joint by using multiple cold heading machines and using different molds on each cold heading machine through multiple processes has appeared on the market, which includes (1) shrinking, shrinking one end of the stainless steel pipe to obtain a reducer, (2) flattening, flattening the middle part of the reducer to the designed size, (3) expanding, expanding the holes at both ends of the flattened reducer to obtain a reducer with tubular connectors of the designed size at both ends, and (4) pressing eccentricity, pressing eccentricity on the reducer with the tubular connector to obtain a curved leg rough blank. This technology still has many shortcomings. It adopts a multi-die and multi-step extrusion method for production, resulting in a high defective rate and a high scrap rate during the production process. The circumscribed circle size at both ends of the curved leg joint is not accurate and the straightness is poor. In the step of pressing eccentricity on the curved leg joint after expansion, an arc is formed between the middle section of the curved leg joint and the straight line approaching the two ends, resulting in an incomplete thread tip and a torque that cannot be guaranteed. Summary of the invention

[0003] The technical problem to be solved by the present invention is to address the deficiencies of the above-mentioned prior art.

[0004] Provide new curved leg joint forming equipment.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a novel curved foot joint forming equipment, comprising a frame and a workbench arranged on the frame, characterized in that at least one group of front end fixed molds arranged at intervals are arranged in sequence on the workbench: to fix the unexpanded end of the curved foot joint; a middle clamping mechanism: to flatten the middle part of the curved foot joint; at least one group of rear end fixed molds arranged at intervals and opposite to the front end fixed mold: to fix the expanded end of the curved foot joint; a high-pressure core pump mechanism, which is driven into the expanded end of the curved foot joint fixed in the rear end fixed mold and extends to the middle part of the curved foot joint or is driven into the unexpanded end of the curved foot joint and extends to the middle part of the curved foot joint; an eccentric guide mechanism: when the front end fixed mold and the rear end fixed mold fix the curved foot joint, the high-pressure core pump mechanism is driven into the expanded end of the curved foot joint and the middle clamping mechanism clamps the middle part of the curved foot joint, the rear end fixed mold and the high-pressure core pump mechanism are lifted up or pressed down as a whole to achieve eccentric guide of the curved foot joint.

[0006] By adopting the above technical scheme, the working principle of the present invention is that the unexpanded end of the curved foot joint after the expansion is aligned with the front end fixed mold manually or through an automatic feeding mechanism or a feeding robot, and the expanded end is aligned with the rear end fixed mold and placed in the front and rear end fixed molds, the front and rear end fixed molds are closed, and then the high-pressure core pump mechanism is driven into the expanded end of the curved foot joint. Of course, it is also possible to drive into the unexpanded end, and then the clamping mechanism is closed to clamp and flatten the middle part of the curved foot joint, and the eccentric guide mechanism lifts the rear end fixed mold and the high-pressure core pump mechanism as a whole. Since the front end of the curved foot joint maintains an unchanged longitudinal position in the front end fixed mold, after the rear end fixed mold is lifted, the curved foot joint will Bend in the upward lifting direction, because the high-pressure core pump mechanism is driven into the curved foot joint, it plays an eccentric auxiliary guiding role for the guide eccentric mechanism. The upward lifting stroke of the guide eccentric mechanism is preset to prevent the upward lifting stroke from being too high and damaging the high-pressure core pump mechanism. After completion, the various components return to their positions, take out the eccentrically formed curved foot joint, put in the curved foot joint to be eccentric, and repeat this process. Since the front and rear ends of the curved foot joint are fixed during molding in this scheme, the high-pressure core pump mechanism exists when eccentric, and the middle part of the curved foot joint and the straight line approaching the two ends will not form an arc when eccentric, and the thread tips will not be incomplete when the front and rear ends of the curved foot joint are processed in the subsequent process, and the torque is guaranteed.

[0007] The above-mentioned eccentric forming equipment of the curved foot joint can be further configured as follows: the workbench is connected with a crossbeam plate by guide columns arranged around it, a movable plate that can move up and down along the guide columns is arranged between the workbench and the crossbeam plate, the front end fixed mold includes a front end upper mold and a front end lower mold that are relatively set up, the front end upper mold is connected to the movable plate through the front end upper mold mounting seat, the front end lower mold is connected to the workbench through the front end lower mold mounting seat, a main cylinder for driving the movable plate to move up and down along the guide columns is arranged on the crossbeam plate, the main cylinder piston is fixedly connected to the movable plate, the rear end fixed mold includes a rear end upper mold and a rear end lower mold that are relatively set up, the rear end lower mold contacts with the workbench through the rear end lower mold mounting seat, and the two ends of the rear end lower mold are connected by auxiliary molds that are relatively set up The cylinder is connected to a rear end upper mold mounting seat, an auxiliary cylinder is arranged on the rear end upper mold mounting seat and is connected to the rear end lower mold mounting seat through an auxiliary cylinder piston, the rear end upper mold is arranged on the rear end upper mold mounting seat, and the middle clamping and flattening mechanism is arranged between the front end fixed mold and the rear end fixed mold. When the number of front and rear end fixed molds is greater than one group, the front end upper mold and the front end upper mold mounting seat are provided with a first linkage structure cooperating with the middle clamping and flattening mechanism, the front end lower mold and the front end lower mold mounting seat are provided with a second linkage structure cooperating with the middle clamping and flattening mechanism, the rear end upper mold and the rear end upper mold mounting seat are provided with a third linkage structure cooperating with the middle clamping and flattening mechanism, and a fourth linkage structure cooperating with the middle clamping and flattening mechanism is arranged between the rear end lower mold and the rear end lower mold mounting seat.

[0008] By adopting the above technical scheme, the front end upper mold mounting seat is driven downward by the main cylinder to drive the front end upper mold downward to contact and close the mold with the front end lower mold, thereby fixing the front end of the curved foot joint. Since the rear end lower mold mounting seat is in contact with the workbench, when the auxiliary cylinder piston is pushed out, the rear end upper mold mounting seat will rise or fall under the action of the auxiliary cylinder piston to open and close the mold, and the rear end of the curved foot joint is fixed when closing the mold. Since the middle part of the curved foot joint needs to be flattened by the middle clamping mechanism, when only one set of front and rear end fixed molds is set, the middle clamping mechanism only needs to flatten the curved foot joint of this group of modules and then reset it.

[0009] The above-mentioned new type of eccentric forming equipment for curved foot joints can be further configured as follows: the middle clamping flattening mechanism includes a first clamping flattening guide plate and a second clamping flattening guide plate which are arranged on both sides of the workbench and are located between the front end lower mold and the rear end lower mold and are relatively set up. The first clamping flattening guide plate and the second clamping flattening guide plate are respectively installed on the workbench through the first guiding mechanism. Both ends of the first clamping flattening guide plate are penetrated with clamping flattening guide rods. The clamping flattening guide rods extend toward the second clamping flattening guide plate and pass through the second clamping flattening guide plate and are connected with a clamping flattening driving cylinder. The clamping flattening driving piston of the clamping flattening driving cylinder is fixedly connected to the second clamping flattening guide plate. The opposite ends of the first clamping flattening guide plate and the second clamping plate guide plate are both provided with clamping flattening templates between the clamping flattening guide rods. When the number of the front and rear end fixed molds is greater than one group, a clamping flattening template is also provided between the two clamping flattening templates. A same number of clamping and flattening movable plates are provided, which are installed between the front end and rear end fixed molds through the fifth linkage structure, and a first reset spring is arranged between adjacent clamping and flattening movable plates. When the number of the front and rear end fixed molds is greater than one group, a first linkage structure cooperating with the middle clamping and flattening mechanism is arranged between the front end upper mold and the front end upper mold mounting seat, a second linkage structure cooperating with the middle clamping and flattening mechanism is arranged between the front end lower mold and the front end lower mold mounting seat, a third linkage structure cooperating with the middle clamping and flattening mechanism is arranged between the rear end upper mold and the rear end upper mold mounting seat, and a fourth linkage structure cooperating with the middle clamping and flattening mechanism is arranged between the rear end lower mold and the rear end lower mold mounting seat, and a second reset spring is arranged between adjacent front end upper molds, adjacent front end lower molds, adjacent rear end upper molds and adjacent rear end lower molds.

[0010] By adopting the above technical scheme, when there is only one set of front and rear end fixed molds, that is, the equipment is one station at this time, the second clamping flattening guide plate is driven by the clamping flattening drive cylinder to move along the clamping flattening guide rod and the first guide mechanism in the direction close to the first clamping flattening guide plate, and the clamping flattening templates arranged at the opposite ends of the first clamping flattening guide plate and the second clamping flattening guide plate will clamp and flatten the two sides of the middle part of the curved foot joint fixed by the front and rear end fixed molds. When the number of the front and rear end fixed molds is greater than one group, since the middle clamping flattening mechanism needs to flatten the curved foot joints in multiple sets of front and rear end fixed molds at the same time, each set of front and rear end fixed molds will move closer to the first clamping flattening guide plate under the action of the middle clamping flattening mechanism, that is, each set of front and rear end fixed molds will move closer to the first clamping flattening guide plate. The spacing between the rear end fixed molds will be reduced, so the first, second, third and fourth linkage structures that cooperate with the middle clamping mechanism are arranged between the front end upper mold and the front end upper mold mounting seat, the front end lower mold and the front end lower mold mounting seat, the rear end upper mold and the rear end upper mold mounting seat, and the rear end lower mold and the rear end lower mold mounting seat. The clamping movable plate is ensured by the fifth linkage structure to cooperate with the middle clamping mechanism to clamp the curved foot joints in multiple groups of front and rear end fixed molds at the same time when the middle clamping mechanism is working. The first return spring and the second return spring are arranged to return the clamping template, the adjacent front end upper mold, the adjacent front end lower mold, the adjacent rear end upper mold and the adjacent rear end lower mold after the clamping drive cylinder returns.

[0011] The above-mentioned new type of eccentric forming equipment for curved foot joints can be further configured as follows: the rear end lower mold extends outward from one end of the front end fixed mold to form a core pump mounting seat, the high-pressure core pump mechanism is installed on the core pump mounting seat, the high-pressure core pump mechanism includes a high-pressure core pump body and a high-pressure piston core arranged at one end of the core pump body, the other end of the high-pressure piston core relatively connected to the core pump body is provided with a first eccentric guide structure, and a second eccentric guide structure is provided between the front end lower mold and the rear end upper mold or between the front end upper mold and the rear end lower mold at one end of the clamping mechanism toward the middle.

[0012] By adopting the above technical scheme, a first eccentric guide structure is arranged on the high-pressure piston core, and a second eccentric guide structure is arranged between the front end lower die and the rear end upper die toward one end of the middle clamping mechanism or between the front end upper die and the rear end lower die toward one end of the middle clamping mechanism, so as to guide and limit the curved foot joint when the eccentricity is guided. When the overall lifting method is adopted, the second eccentric guide structure is arranged between the front end upper die and the rear end lower die. When the overall downward pressing method is adopted, the second eccentric guide structure is arranged between the front end lower die and the rear end upper die to ensure that the eccentric direction is consistent with the force direction of the guiding eccentric structure, so as to prevent the excessive eccentricity from forming an arc in the middle part of the curved foot joint and the straight line approaching part at both ends, resulting in incomplete thread tips and insufficient torque guarantee.

[0013] The above-mentioned new type of eccentric forming equipment for curved foot joints can be further configured as follows: the first eccentric guide structure is a first guide bevel block arranged on the high-pressure piston core, the second eccentric guide structure includes a first guide eccentric mold arranged on the front end upper mold and a second guide eccentric mold arranged on the rear end lower mold opposite to the first guide eccentric mold, and a guide eccentric mold is formed between the first guide eccentric mold and the second guide eccentric mold, the inclination direction of which is consistent with the inclination direction of the first guide bevel block.

[0014] By adopting the above technical scheme, a first guide bevel block is arranged on the high-pressure piston core. When the overall lifting method is adopted, a first guide eccentric mold is arranged on the front end upper mold and a second guide eccentric mold is arranged on the rear end lower mold. A guide eccentric mold whose inclination direction is consistent with the inclination direction of the first guide bevel block is formed between the first guide eccentric mold and the second guide eccentric mold. When the guide eccentric mechanism drives the entire rear end fixed mold to lift up, it is ensured that the eccentric direction of the curved foot joint is consistent with the inclination direction of the first guide bevel block and the guide eccentric mold and the force direction of the guide eccentric mechanism.

[0015] The above-mentioned new type of eccentric forming equipment for curved foot joints can be further configured as follows: the eccentric guide mechanism includes an eccentric guide drive cylinder arranged at one end of the workbench toward the frame, and the piston of the eccentric guide drive cylinder passes through the workbench and is fixedly connected to the rear end lower mold mounting seat.

[0016] By adopting the above technical solution, an eccentric guide drive cylinder is arranged at one end of the workbench facing the frame, and is fixedly connected to the rear end lower mold mounting seat through the piston of the eccentric guide drive cylinder. After the rear end fixed mold is closed under the action of the auxiliary cylinder, it is lifted as a whole under the action of the eccentric guide drive cylinder.

[0017] The above-mentioned new type of eccentric forming equipment for curved foot joints can be further configured as follows: the first guiding mechanism includes a first linear guide rail arranged on the workbench and relatively set, the first linear rail is connected to a clamping guide plate mounting seat through a slider, the first clamping guide plate and the second clamping guide plate are both fixedly connected to the clamping guide plate mounting seat, the first linkage structure includes a second linear rail arranged on the front end upper mold mounting seat, the front end upper mold is connected to the second linear rail through a slider, the second linkage structure includes a third linear rail arranged on the front end lower mold mounting seat, the front end lower mold is connected to the third linear rail through a slider, the third linkage structure includes a fourth linear rail arranged on the rear end upper mold mounting seat, the rear end upper mold is connected to the fourth linear rail through a slider, the fourth linkage structure includes a fifth linear rail arranged on the rear end lower mold mounting seat, the rear end lower mold is connected to the fifth linear rail through a slider

[0018] By adopting the above technical solution, the front end upper mold and the front end upper mold mounting seat, the front end lower mold and the front end lower mold mounting seat, the rear end upper mold and the rear end upper mold mounting seat, and the rear end lower mold and the rear end lower mold mounting seat are connected through linear rails and sliders. This is not only reliable in operation but also easy to implement.

[0019] The above-mentioned new type of eccentric forming equipment for curved foot joints can be further configured as follows: the fifth linkage structure includes a connecting vertical plate arranged at one end of the front end lower mold mounting seat, a connecting groove is opened on the connecting vertical plate, a connecting horizontal plate with one end inserted in the connecting groove and connected to the rear end lower mold mounting seat at the other end is connected in the connecting groove, a sixth linear rail is arranged on the connecting horizontal plate, and a clamping movable plate mounting seat integrally formed with the clamping movable plate is provided on the clamping movable plate, and the clamping movable plate mounting seat is connected to the sixth linear rail through a slider.

[0020] By adopting the above technical solution, the clamping and flattening movable plate is installed between the front lower die mounting seat and the rear lower die mounting seat through the sixth linear rail and the slider, which is not only reliable in operation but also easy to implement.

[0021] The beneficial effects of the present invention are as follows: the front and rear ends of the curved leg joint are fixed during molding, a high-pressure core pump mechanism exists when eccentric, and no arc is formed between the middle part of the curved leg joint and the straight line approaching parts at both ends when eccentric. When threads are processed on the front and rear ends of the curved leg joint in subsequent processes, the thread tips will not be incomplete and the torque is guaranteed.

[0022] The present invention is further described in detail below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A three-dimensional schematic diagram of an embodiment of the present invention Figure 1 .

[0024] Figure 2 A three-dimensional schematic diagram of an embodiment of the present invention Figure 2 .

[0025] Figure 3 It is a schematic diagram of the high-pressure core pump mechanism and the rear end lower mold installation structure of an embodiment of the present invention.

[0026] Figure 4 It is a schematic diagram of the three-dimensional structure of the middle clamping mechanism of an embodiment of the present invention.

[0027] Figure 5 It is a schematic diagram of the three-dimensional structure of the high-pressure core pump mechanism according to an embodiment of the present invention.

[0028] Figure 6 It is a schematic diagram of the three-dimensional structure of the second eccentric guide structure according to an embodiment of the present invention.

[0029] Figure 7 Schematic diagram of the three-dimensional structure of an embodiment of the present invention Figure 3 .

[0030] Figure 8 It is a schematic diagram of the three-dimensional structure of an embodiment of the present invention without the middle clamping mechanism.

[0031] Fig. 9 It is a schematic diagram of the structure of the curved leg joint after expansion.

[0032] Fig.10 This is a schematic diagram of the structure of the curved leg joint after being clamped and flattened.

[0033] Fig.11 It is a schematic diagram of the structure of the curved foot joint after the eccentricity is guided. DETAILED DESCRIPTION

[0034] See also Figure 1-Figure 11As shown: a novel curved foot joint forming equipment comprises a frame 1 and a workbench 2 arranged on the frame 1, on which five groups of front fixed molds 3 arranged at intervals are arranged in sequence: to fix the unexpanded end of the curved foot joint; a middle clamping mechanism 4: to flatten the middle part of the curved foot joint; at least one group of rear fixed molds 5 arranged at intervals and opposite to the front fixed mold 3: to fix the expanded end of the curved foot joint; a high-pressure core pump mechanism 6, which is driven into the expanded end of the curved foot joint fixed in the rear fixed mold 5 and extends to the middle of the curved foot joint or driven into the unexpanded end of the curved foot joint and extends to the middle of the curved foot joint;The eccentric guide mechanism 7: when the front end fixed mold 3 and the rear end fixed mold 5 fix the curved foot joint, the high pressure core pump mechanism 6 is driven into the expanded end of the curved foot joint and the middle clamping mechanism 4 clamps the middle of the curved foot joint, the rear end fixed mold 5 and the high pressure core pump mechanism 6 are lifted up or pressed down as a whole to achieve the eccentric guide of the curved foot joint, the workbench 2 is connected with the cross beam plate 22 through the guide columns 21 arranged around, and a movable plate 23 that can move up and down along the guide columns 21 is arranged between the workbench 2 and the cross beam plate 22, and the front end fixed mold 3 includes a front end upper mold 31 and a front end lower mold 32 that are relatively set, and the front end upper mold 31 is connected to the movable plate 23 through the front end upper mold mounting seat 311, and the front end lower mold 32 is connected to the movable plate 23 through the front end upper mold mounting seat 311. The front end lower die mounting seat 321 is connected to the workbench 2, and a main cylinder 24 for driving the movable plate 23 to move up and down along the guide column 21 is provided on the crossbeam plate 22. The main cylinder piston 241 is fixedly connected to the movable plate 23. The rear end fixed mold 5 includes a rear end upper mold 51 and a rear end lower mold 52 which are relatively set. The rear end lower mold 52 contacts the workbench 2 through the rear end lower mold mounting seat 521. The two ends of the rear end lower mold 52 are connected to the rear end upper mold mounting seat 511 through the relatively set auxiliary cylinders 54. The auxiliary cylinder 54 is set on the rear end upper mold mounting seat 511 and is connected to the rear end lower mold mounting seat 521 through the auxiliary cylinder piston 541. The rear end upper mold 51 is set on the rear end upper mold mounting seat 511. The middle clamping machine The structure 4 is arranged between the front-end fixed mold 3 and the rear-end fixed mold 5, and the rear-end lower mold 52 extends outward from one end of the front-end fixed mold 3 to form a core pump mounting seat 522. The high-pressure core pump mechanism 6 is installed on the core pump mounting seat 522. The high-pressure core pump mechanism 6 includes a high-pressure core pump body 61 and a high-pressure piston core 62 arranged at one end of the core pump body 61. The rear-end lower mold 52 is provided with a high-pressure piston core limiting groove 523 for the high-pressure piston core 62 to move. The other end of the high-pressure piston core 62 is relatively connected to the core pump body 61. A first eccentric guide structure is provided, and one end of the clamping mechanism 4 is arranged between the front-end lower mold 32 and the rear-end upper mold 51 or between the front-end upper mold 31 and the rear-end lower mold 52 toward the middle There is a second eccentric guide structure, a first linkage structure cooperating with the middle clamping mechanism 4 is arranged between the front upper die 31 and the front upper die mounting seat 311, a second linkage structure cooperating with the middle clamping mechanism 4 is arranged between the front lower die 32 and the front lower die mounting seat 321, a third linkage structure cooperating with the middle clamping mechanism 4 is arranged between the rear upper die 51 and the rear upper die mounting seat 511, a fourth linkage structure cooperating with the middle clamping mechanism 4 is arranged between the rear lower die 52 and the rear lower die mounting seat 521, and a second return spring (not shown in the figure) is arranged between adjacent front upper dies 31, adjacent front lower dies 32, adjacent rear upper dies 51 and adjacent rear lower dies 52;The middle clamping mechanism 4 includes a first clamping guide plate 41 and a second clamping guide plate 42 which are arranged on both sides of the workbench 2 and are located between the front lower die 32 and the rear lower die 52. The first clamping guide plate 41 and the second clamping guide plate 42 are respectively installed on the workbench 2 through the first guide mechanism. Both ends of the first clamping guide plate 41 are penetrated with a clamping guide rod 43. The clamping guide rod 43 extends toward the second clamping guide plate 42 and passes through the second clamping guide plate 42 and is connected to a clamping drive cylinder 44. The clamping drive piston 441 of the clamping drive cylinder 44 is connected to the second The clamping flattening guide plate 42 is fixedly connected, and the opposite ends of the first clamping flattening guide plate 41 and the second clamping plate guide plate 42 are both provided with a clamping flattening template 45 between the clamping flattening guide rods 43. Between the two clamping flattening templates 45, there are also clamping flattening movable plates 46 with the same number and interval distribution as the front end fixed mold 3 and the rear end fixed mold 5. The clamping flattening movable plates 46 are installed between the front end fixed mold 3 and the rear end fixed mold 5 through the fifth linkage structure. A first return spring (not shown in the figure) is provided between adjacent clamping flattening movable plates 46. The fifth linkage structure includes a first reset spring (not shown in the figure) provided at the lower front end. A connecting vertical plate 322 at one end of the mold mounting seat 321 is provided with a connecting groove, and a connecting horizontal plate 323 is connected to the connecting groove with one end inserted in the connecting groove and connected to the rear end lower mold mounting seat 521. A sixth linear track 324 is provided on the connecting horizontal plate 322, and a clamping movable plate mounting seat 461 integrally formed with the clamping movable plate 46 is provided on the clamping movable plate 46, and the clamping movable plate mounting seat 461 is connected to the sixth linear track 324 through a slider; the first eccentric guide structure is a first eccentric guide structure provided on the high-pressure piston core 62 The guide bevel block 621, the second eccentric guide structure includes a first guide eccentric die 33 arranged on the front upper die 31 and a second guide eccentric die 55 arranged opposite to the first guide eccentric die 33 on the rear lower die 52, and a guide eccentric die with an inclination direction consistent with the inclination direction of the first guide bevel block is formed between the first guide eccentric die and the second guide eccentric die; the guide eccentric mechanism 7 includes an eccentric guide drive cylinder 71 arranged at one end of the workbench 2 facing the frame 1, and the piston of the guide eccentric drive cylinder 71 passes through the workbench 2 and is fixedly connected to the rear lower die mounting seat 521;The first guide mechanism includes a first linear guide rail 26 arranged on the workbench 2 and arranged opposite to each other. The first linear guide rail 26 is connected to a clamping guide plate mounting seat 27 through a slider. The first clamping guide plate 41 and the second clamping guide plate 42 are both fixedly connected to the clamping guide plate mounting seat 27. The first linkage structure includes a second linear rail 3111 arranged on the front upper die mounting seat 311. The front upper die 31 is connected to the second linear rail 3111 through a slider. The second linkage structure includes a third linear rail 3211 arranged on the front lower die mounting seat 321. The front lower die 32 is connected to the third linear rail 3211 through a slider. The third linkage structure includes a fourth linear rail 5111 arranged on the rear upper die mounting seat 511. The rear upper die 51 is connected to the fourth linear rail 5111 through a slider. The fourth linkage structure includes a fifth linear rail 5211 arranged on the rear lower die mounting seat 521. The rear lower die 52 is connected to the fifth linear rail 5211 through a slider. ;

Claims

1. A novel eccentric forming device for curved leg joints, comprising a frame and a workbench arranged on the frame, characterized in that: The workbench is provided with at least one group of front-end fixed molds arranged at intervals in sequence: to fix the unexpanded end of the curved foot joint; a middle clamping mechanism: to clamp and flatten the middle of the curved foot joint; at least one group of rear-end fixed molds arranged at intervals and opposite to the front-end fixed mold: to fix the expanded end of the curved foot joint; a high-pressure core pump mechanism, which is driven into the expanded end of the curved foot joint fixed in the rear-end fixed mold and extends to the middle of the curved foot joint; an eccentric guide mechanism: when the front-end fixed mold and the rear-end fixed mold fix the curved foot joint, the high-pressure core pump mechanism is driven into the expanded end of the curved foot joint, and the middle clamping mechanism clamps and flattens the middle of the curved foot joint, the rear-end fixed mold and the high-pressure core pump mechanism are lifted up or pressed down as a whole to achieve eccentric guide of the curved foot joint, the workbench is connected to a crossbeam plate by guide columns arranged around it, and a movable plate that can move up and down along the guide columns is provided between the workbench and the crossbeam plate, and the front-end fixed mold includes a front-end upper mold and a front-end lower mold that are relatively set, the front-end upper mold is connected to the movable plate through a front-end upper mold mounting seat, and the front-end lower mold is connected to the workbench through a front-end lower mold mounting seat. The workbench is provided with a main cylinder for driving the movable plate to move up and down along the guide column, and the main cylinder piston is fixedly connected to the movable plate. The rear end fixed mold includes a rear end upper mold and a rear end lower mold set up relatively, and the rear end lower mold contacts the workbench through the rear end lower mold mounting seat. The two ends of the rear end lower mold are connected with the rear end upper mold mounting seat through the auxiliary cylinders set up relatively. The auxiliary cylinder is set on the rear end upper mold mounting seat and connected with the rear end lower mold mounting seat through the auxiliary cylinder piston. The rear end upper mold is set on the rear end upper mold mounting seat. The middle clamping mechanism is set between the front end fixed mold and the rear end fixed mold. The end of the rear end lower mold away from the front end fixed mold extends outward to form a core pump mounting seat. The high-pressure core pump mechanism is installed on the core pump mounting seat. The high-pressure core pump mechanism includes a high-pressure core pump body and a high-pressure piston core set at one end of the high-pressure core pump body. The other end of the high-pressure piston core relative to the high-pressure core pump body is provided with a first eccentric guide structure, and a second eccentric guide structure is set between the front end lower mold and the rear end upper mold or between the front end upper mold and the rear end lower mold toward one end of the middle clamping mechanism.

2. The new eccentric forming equipment for curved leg joints according to claim 1 is characterized in that: The middle clamping flattening mechanism includes a first clamping flattening guide plate and a second clamping flattening guide plate which are arranged on both sides of the workbench and are located between the front end lower mold and the rear end lower mold. The first clamping flattening guide plate and the second clamping flattening guide plate are respectively installed on the workbench through the first guiding mechanism. Both ends of the first clamping flattening guide plate are penetrated with clamping flattening guide rods. The clamping flattening guide rods extend toward the second clamping flattening guide plate and pass through the second clamping flattening guide plate and are connected with a clamping flattening driving cylinder. The clamping flattening driving piston of the clamping flattening driving cylinder is fixedly connected to the second clamping flattening guide plate. The opposite ends of the first clamping flattening guide plate and the second clamping flattening guide plate are both provided with clamping flattening templates between the clamping flattening guide rods. When the number of the front end and the rear end fixed molds is greater than one group, a clamping flattening movable plate which is the same as the number of the front end and the rear end fixed molds is also provided between the two clamping flattening templates. The clamping movable plate is installed between the front end and the rear end fixed molds through the fifth linkage structure, and a first return spring is arranged between adjacent clamping movable plates. When the number of the front end and the rear end fixed molds is greater than one group, a first linkage structure cooperating with the middle clamping mechanism is arranged between the front end upper mold and the front end upper mold mounting seat, a second linkage structure cooperating with the middle clamping mechanism is arranged between the front end lower mold and the front end lower mold mounting seat, a third linkage structure cooperating with the middle clamping mechanism is arranged between the rear end upper mold and the rear end upper mold mounting seat, and a fourth linkage structure cooperating with the middle clamping mechanism is arranged between the rear end lower mold and the rear end lower mold mounting seat. Second return springs are arranged between adjacent front end upper molds, adjacent front end lower molds, adjacent rear end upper molds and adjacent rear end lower molds.

3. The new eccentric forming equipment for curved leg joints according to claim 1 is characterized in that: The first eccentric guide structure is a first guide bevel block arranged on the high-pressure piston core, and the second eccentric guide structure includes a first guide eccentric mold arranged on the front end upper mold and a second guide eccentric mold arranged on the rear end lower mold opposite to the first guide eccentric mold, and a guide eccentric mold is formed between the first guide eccentric mold and the second guide eccentric mold, and the inclination direction of the guide eccentric mold is consistent with the inclination direction of the first guide bevel block.

4. The new eccentric forming equipment for curved leg joints according to claim 1 is characterized in that: The eccentric guide mechanism comprises an eccentric guide drive cylinder arranged at one end of the workbench facing the frame, and a piston of the eccentric guide drive cylinder passes through the workbench and is fixedly connected to a rear end lower die mounting seat.

5. The new eccentric forming equipment for curved leg joints according to claim 2 is characterized in that: The first guiding mechanism includes a first linear rail arranged on the workbench and relatively set up, the first linear rail is connected to a clamping guide plate mounting seat through a slider, the first clamping guide plate and the second clamping guide plate are fixedly connected to the clamping guide plate mounting seat, the first linkage structure includes a second linear rail arranged on the front end upper mold mounting seat, the front end upper mold is connected to the second linear rail through a slider, the second linkage structure includes a third linear rail arranged on the front end lower mold mounting seat, the front end lower mold is connected to the third linear rail through a slider, the third linkage structure includes a fourth linear rail arranged on the rear end upper mold mounting seat, the rear end upper mold is connected to the fourth linear rail through a slider, the fourth linkage structure includes a fifth linear rail arranged on the rear end lower mold mounting seat, the rear end lower mold is connected to the fifth linear rail through a slider.

6. The new eccentric forming equipment for curved leg joints according to claim 2 is characterized in that: The fifth linkage structure includes a connecting vertical plate arranged at one end of the front end lower mold mounting seat, a connecting groove is opened on the connecting vertical plate, a connecting horizontal plate with one end inserted in the connecting groove and connected to the rear end lower mold mounting seat at the other end is connected in the connecting groove, a sixth linear track is arranged on the connecting horizontal plate, and the clamping movable plate is provided with a clamping movable plate mounting seat integrally formed with the clamping movable plate, and the clamping movable plate mounting seat is connected to the sixth linear track through a slider.

Images