Punching die with core rod positioning mechanism

Abstract

The utility model discloses a punching die with a core rod positioning mechanism. The punching die comprises an upper die frame, a lower die frame and at least one station assembly. The station assembly comprises a male die extending longitudinally, a core rod, a die cavity component provided with a die cavity, a front-end positioning assembly and a rear-end positioning assembly, wherein the front-end positioning assembly and the rear-end positioning assembly are arranged on the front side and the rear side of the core rod respectively. And the core rod transversely extends back and forth and is inserted into the die cavity. The front-end positioning assembly comprises an overturning clamping block provided with a front-end clamping groove and a clamping block pressing block; a clamping block clamping groove is formed in the side wall of the overturning clamping block, and an automatic clamping block capable of being embedded into the clamping block clamping groove is arranged in the clamping block pressing block. The rear end positioning assembly comprises a rear end positioning block provided with a positioning block through groove, a core rod positioning block provided with a rear end clamping groove is arranged in the positioning block through groove, a first positioning hole and a second positioning hole are formed in the core rod positioning block and the rear end positioning block respectively, and a plug pin is inserted into the first positioning hole and the second positioning hole at the same time. The hole height of the first positioning hole and the hole height of the second positioning hole are both larger than the height of the plug pin. The device is easy to operate, and the two ends of the core rod can be locked in the operation process.

Description

Technical Field

[0001] The utility model relates to the technical field of punching, in particular to a punching die with a core rod positioning mechanism. Background Art

[0002] In modern equipment, many pipe fittings need to be drilled. Compared with machine drilling, using die punching to punch holes on various pipes can greatly save processing costs and improve production efficiency. At the same time, it can also reduce the amount of burrs and debris generated during processing and improve processing quality.

[0003] In some punching molds, an upper mold frame and a lower mold frame are included, between which a punch, a core rod (i.e., a die) and a cavity component (a component with a cavity, in which the die and the pipe to be punched can be placed) are arranged; the punch is connected to the lower end of the upper mold frame and extends longitudinally; the cavity component is located at the upper end of the lower mold frame, and a laterally extending cavity is provided in the cavity component for inserting the core rod and the product; the core rod is placed in the cavity, and a punching hole is provided on the core rod directly below the punch; at the same time, a through hole is provided at the upper end of the cavity component for the punch to pass through from top to bottom, and the through hole is connected to the cavity and is located directly below the lower end of the punch.

[0004] During the punching operation using the above-mentioned punching die, if the position of the core rod is not locked before the punching operation, the alignment between the lower end of the punch and the punching hole on the core rod may not be precise enough, which may result in wear and tear of the punch and core rod and poor punching quality of the product.

[0005] In order to maintain the alignment accuracy between the punch and the hole, we need to ensure that the mandrel does not move as much as possible during the punching process, especially the lateral displacement. To this end, we designed the rear end positioning component and the front end positioning component to achieve the positioning of the mandrel. The specific idea is: before inserting the distribution tube into the mold cavity from front to back and sleeved on the periphery of the mandrel, first use the rear end positioning component located on the rear side of the mandrel to fix the rear end of the mandrel; then, sleeve the distribution tube on the periphery of the mandrel in the mold cavity, and then use the front end positioning component located on the front side of the mandrel to fix the front end of the mandrel, so as to lock the lateral position of the mandrel and ensure that the mandrel will not deviate left and right during the punching process.

[0006] In our design, the rear end positioning component is a rear end fixing block fixed to the upper end of the lower die frame, and a rear end slot is provided on the side of the rear end fixing block facing the rear end of the core rod. The rear end of the core rod inserted into the mold cavity is inserted into the rear end slot and cannot be radially rotated or moved left and right, but can be moved up and down (for example, the shape of the rear end slot and the rear end of the core rod are both rectangular, and the length of the left and right sides of the rear end slot and the length of the left and right sides of the rear end of the core rod are almost equal, but the height of the rear end slot is greater than the height of the rear end of the core rod); when the rear end of the core rod is inserted into the rear end slot, the rear end of the core rod cannot be displaced left and right, but can be moved up and down slightly. The front end positioning component adopts a front end block with a front end slot, which is detachably connected to the upper end of the lower die frame. When the distribution tube is sleeved on the outer periphery of the core rod in the mold cavity, the front end of the core rod is inserted into the front end slot, and then the front end block is fixed to the lower die frame using a fixing pin, thereby locking the front end block; after the punching is completed, the fixing pin is pulled out to remove the front end block, and the distribution tube is withdrawn from the mold cavity after the space in front of the core rod is released.

[0007] Since the distance between the rear end slot and the front end slot is equal to the length of the mandrel, and the front and rear ends of the mandrel are respectively inserted into the front end slot and the rear end slot, the position of the mandrel can be locked.

[0008] However, in the above structure, the operator is required to manually insert and remove the fixed pin in each stamping operation, which is cumbersome and inefficient. Utility Model Content

[0009] The utility model aims to provide a punching die with a core rod positioning mechanism, which mainly solves the technical problem of positioning the end of a core rod inserted laterally into a die cavity during the punching process, minimizes the displacement of the core rod during the punching process, has a simple structure, and is flexible and convenient to operate.

[0010] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0011] A punching die with a core rod positioning mechanism comprises an upper die frame and a lower die frame, wherein at least one set of station components is arranged between the upper die frame and the lower die frame;

[0012] Each group of station components includes a longitudinally extending male mold, a core rod extending forward and backward, a cavity component connected to the upper end of the lower mold frame, and a core rod positioning mechanism; the upper end of the male mold is connected to the upper mold frame, and the lower end faces the core rod; a cavity extending forward and backward is provided in the cavity component, and a through hole is provided at the upper end of the cavity component for the male mold to pass through; the through hole is through from top to bottom and communicates with the cavity; the core rod is inserted into the cavity;

[0013] The core rod positioning mechanism comprises a front end positioning component and a rear end positioning component respectively located at the front and rear sides of the mold cavity component;

[0014] The front end positioning assembly includes a flip block located at the front side of the mandrel and flipped toward the front end of the mandrel, the flip block is flipped and connected to the lower mold frame, and a front end slot is provided on the side wall of the flip block facing the mandrel; a block pressing block is also provided on the left or right side of the flip block at the upper end of the lower mold frame, and an automatic block that can move laterally is connected to the block pressing block, and a block slot for the end of the automatic block to be embedded is provided on the side wall of the flip block facing the automatic block;

[0015] The rear end positioning assembly includes a rear end positioning block connected to the upper end of the lower mold frame and located at the rear side of the mandrel, the rear end positioning block is provided with a positioning block through slot for the rear end of the mandrel to be inserted, a mandrel positioning block is provided in the positioning block through slot, the mandrel positioning block is provided with a rear end slot on the side facing the mandrel, a positioning hole 1 extending left and right is provided on the mandrel positioning block, and a positioning hole 2 penetrating at both ends of the left and right is provided on the side wall of the rear end positioning block;

[0016] It also includes a latch pin, which is inserted into the first positioning hole and the second positioning hole transversely at the same time; and the hole height of the first positioning hole and the hole height of the second positioning hole are both greater than the height of the latch pin.

[0017] Furthermore, the lower end of the core rod positioning block is also connected to an elastic component three.

[0018] Furthermore, the workstation components are divided into two groups, namely a first workstation component and a second workstation component which are arranged side by side on the left and right;

[0019] It also includes a material return pull rod assembly; the material return pull rod assembly includes a pull rod limit block, a pull rod extending front and rear, a connecting rod extending left and right, a push rod 1 and a push rod 2;

[0020] The pull rod limit block is arranged at the upper end of the lower mold frame, and is located between the first station assembly and the second station assembly; the pull rod limit block is provided with a movable socket that passes through the front and back, and the pull rod passes through the movable socket; the connecting rod is located at the rear side of the first station assembly and the second station assembly and is connected to the pull rod; the push rod one and the push rod two are both connected to the connecting rod; and the front ends of the push rod one and the push rod two are respectively inserted into different positioning block grooves from back to front.

[0021] Furthermore, the mold cavity component includes a pressing plate and a concave mold plate distributed up and down, and the mold cavity is placed between the pressing plate and the concave mold plate; the through hole is located at the upper end of the pressing plate.

[0022] Furthermore, it also includes a longitudinally extending positioning guide post and a positioning groove for the positioning guide post to be inserted into;

[0023] The lower end of the positioning guide column is fixedly connected to the concave template, and the positioning groove is arranged at the lower end of the pressing plate; or the upper end of the positioning guide column is fixedly connected to the lower end of the pressing plate, and the positioning groove is arranged at the upper end of the concave template.

[0024] Furthermore, it also includes an elastic component 1 for causing the concave mold plate and the pressing plate to loosen; the elastic component 1 is arranged between the concave mold plate and the pressing plate;

[0025] It also includes at least one longitudinally retractable pressing assembly, the upper end of which is connected to the lower end of the upper mold frame, and the bottom of which is placed above the pressing plate and higher than the lower end of the punch.

[0026] Further, the mold cavity component in the first station assembly is a first mold cavity component, and the mold cavity component in the second station assembly is a second mold cavity component;

[0027] The length of the first cavity member is greater than the length of the second cavity member;

[0028] A movable angle fixing block is also provided on the front side of the second mold cavity component, and a locking pin which can lock the existing hole on the product is provided on the angle fixing block.

[0029] Furthermore, a guide column assembly is provided between the upper mold frame and the lower mold frame.

[0030] Compared with the prior art, the utility model provides a punching die with a core rod positioning mechanism, which has the following beneficial effects:

[0031] In this embodiment, the mandrel positioning mechanism includes a front-end positioning component and a rear-end positioning component. The flip block in the rear-end positioning component flips forward and backward. Before the distribution tube is inserted into the mold cavity and sleeved on the outer ring of the mandrel, the flip block can be flipped backward to make room for the front side of the mandrel, so that the operator can insert the distribution tube from the front side of the mandrel into the mold cavity from the front to the back. Then, after the distribution tube is inserted into place, the flip block is flipped forward to clamp the rear end of the mandrel, thereby quickly locking the mandrel between the end positioning component and the rear-end positioning component. In addition, when the flip block is flipped into place, the end of the automatic block enters the block slot on the flip block, thereby locking the position of the flip block so that it cannot continue to flip and move.

[0032] The above structure is relatively simple, easy and convenient to operate for operators, and more efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a top view of the punching die with a positioning device after the upper die frame, the top pressing assembly and the punch are removed in the utility model.

[0034] Figure 2 It is a front view of the punching die after the front end positioning component is removed in the utility model.

[0035] Figure 3It is a top view structural schematic diagram of the utility model in a state where the rear end positioning assembly and the material return pull rod assembly are connected.

[0036] Figure 4 It is a front view of the rear end positioning component of the utility model.

[0037] Figure 5 It is a side view of the rear end positioning component of the utility model.

[0038] Figure 6 It is a schematic diagram of the top view of the front end positioning component of the utility model when in use.

[0039] Figure 7 It is a side view structural schematic diagram of the front end positioning component in the utility model in two closed states.

[0040] In the picture:

[0041] A-upper mold frame, B-lower mold frame, C-guide column assembly, D-mold foot;

[0042] 1-2-first punch, 1-2-first core rod, 1-3-first pressing plate, 1-4-first concave plate, 1-5-positioning guide column, 1-6-pressing assembly, 1-7-elastic component 1;

[0043] 2-1-second punch, 2-2-second core rod, 2-3-second pressing plate, 2-4-second concave mold plate;

[0044] 3-1- material return pull rod assembly, 4-1- positioning pin, 4-2- angle fixing block;

[0045] 5-front end positioning assembly, 5-1-flip card block, 5-2-front end card slot, 5-3-card block slot, 5-4-handle, 5-5-card block pressure block, 5-6-automatic card block, 5-7-elastic component 2, 5-8-pin shaft;

[0046] 6-rear end positioning assembly, 6-1-cover plate, 6-2-base block, 6-3-latch, 6-4-core rod positioning block, 6-5-rear end slot, 6-6-elastic component three, 6-7-positioning block slot;

[0047] 7-1-pull rod limit block, 7-2-pull rod, 7-3-connecting rod, 7-4-push rod one, 7-5-push rod two. DETAILED DESCRIPTION

[0048] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0049] like Figure 1-7 As shown, a punching die with a core rod positioning mechanism is provided, and the punching die includes an upper die frame A, a lower die frame B, a guide column assembly C and two sets of station assemblies. The guide column assembly and the two sets of station assemblies are arranged between the upper die frame A and the lower die frame B.

[0050] At the same time, each group of station components includes a punch, a core rod, a cavity component connected to the upper end of the lower mold frame, and a core rod positioning mechanism, and the core rod positioning mechanism includes a front end positioning component and a rear end positioning component respectively located at the front and rear sides of the cavity component. The cavity component is provided with a cavity extending forward and backward for the core rod to be inserted.

[0051] like Figure 1 As shown, the two groups of workstation components in this embodiment are respectively a first workstation component and a second workstation component that are distributed side by side on the left and right.

[0052] The first station assembly includes a first punch 1-1, a first core rod 1-2, and a first cavity member connected to the upper end of the lower die frame B and located directly below the first punch 1-1; the upper end of the first punching punch 1-1 is connected to the upper die frame A, and the lower end thereof is downwardly directed toward the first core rod 1-2; the first core rod 1-2 is provided with a first core rod punching hole through which the first punching punch 1-1 can pass, such as Figure 2 shown.

[0053] The first mold cavity component includes a first pressing plate 1-3 and a first concave mold plate 1-4 distributed up and down. The first pressing plate 1-3 is provided with a through hole for the first punching punch 1-1 to pass through. The first pressing plate 1-3 is detachably mounted on the top of the first concave mold plate 1-4. A first mold cavity into which the first core rod 1-2 can be inserted is provided between the first pressing plate 1-3 and the first concave mold plate 1-4.

[0054] The second station assembly includes a second punch 2-1, a second core rod 2-2, and a second cavity member connected to the upper end of the lower mold frame B and located directly below the second punch 2-1; the upper end of the second punch 2-11 is connected to the upper mold frame A, and the lower end thereof is downwardly directed toward the second core rod 2-2; the second core rod 2-2 is provided with a second core rod punch hole through which the second punch 2-1 can pass, such as Figure 2 shown.

[0055] The second mold cavity component includes a second pressing plate 2-3 and a second concave mold plate 2-4 distributed up and down, the second pressing plate 2-3 is provided with a through hole for the second punch 2-1 to pass through, the second pressing plate 2-3 is detachably mounted on the top of the second concave mold plate 2-4, and a second mold cavity into which the second core rod 2-2 can be inserted is provided between the second pressing plate 2-3 and the second concave mold plate 2-4.

[0056] As described above, the two cavity members (the first cavity member and the second cavity member) in this embodiment are identical in structure.

[0057] In this embodiment, the length of the first mold cavity component on the left is greater than the length of the second mold cavity component on the right. Figure 1 As shown; an angle fixing block 4-2 is also added to the front side of the second cavity component, and a movable locking pin 4-1 is provided on the left side of the angle fixing block 4-2 (the side facing the second core rod 2-2), and the locking pin 4-1 can be locked into the existing punched hole on the product (such as a dispensing tube).

[0058] In this embodiment, the second station assembly is located on the right side of the first station assembly. Specifically, when the punching die is used to punch the distribution tube, the first station assembly is used to punch the distribution tube for the first time, and then the distribution tube that has completed the first punching is placed in the second mold cavity in the second mold cavity component for the second punching operation. At the same time, when the distribution tube that has completed the first punching is placed in the second mold cavity for the second punching operation, a new distribution tube can be placed in the first mold cavity to perform the first punching operation on the new distribution tube synchronously, and the cycle continues.

[0059] During the second punching operation of the distribution tube, since the punching holes have been formed on the distribution tube during the first punching process, we can put the distribution tube into the second cavity in the second cavity component, align the positioning pin 4-1 with the punching hole closest to the tube end on the distribution tube, and lock the second punching hole position, which can also fix the product. The rear end of the positioning pin 4-1 is connected to the convex end 4-1 with a spring, which can realize the forward and backward telescopic movement of the positioning pin 4-1.

[0060] The first station assembly and the second station assembly both include a core rod positioning mechanism with the same structure, which are used to lock the position of the first core rod 1-2 and the second core rod 2-2 respectively.

[0061] like Figure 3-7 As shown, each core rod positioning mechanism includes a front end positioning component 5 and a rear end positioning component 6. The front end positioning component 5 and the rear end positioning component 6 are respectively located at the front side and the rear side of the mold cavity component. Figure 1 shown.

[0062] like Figure 6-7As shown, taking the first group of station components as an example, the front end positioning component 5 includes a flip block 5-1 located at the front side of the first mandrel 1-2 and flipped toward the front end direction of the first mandrel 1-2, the flip block 5-1 is flipped and connected to the lower mold frame B, and a front end slot 5-2 is provided on the side wall of the flip block 5-1 facing the first mandrel 1-2; a block pressing block 5-5 is also provided on the right side of the flip block 5-1 at the upper end of the lower mold frame B, and an automatic block 5-6 that can move laterally is connected to the block pressing block 5-5, and a block slot 5-3 for the end of the automatic block 5-6 to be embedded is provided on the side wall of the flip block 5-1 facing the automatic block 5-6; an elastic component 2 5-7 is provided between the automatic block 5-6 and the block pressing block 5-5. Preferably, the block pressing block 5-5 can also be set at the left side of the flip block 5-1. In this embodiment, the elastic component 2 5-7 is a spring.

[0063] Meanwhile, in this embodiment, a handle 5-4 is also provided on the flip block 5-1, and an operator can grasp the handle 5-4 to perform a flipping operation on the flip block 5-1.

[0064] like Figure 3-5 As shown, taking the first group of station components as an example, the rear end positioning component 6 includes a rear end positioning block connected to the upper end of the lower mold frame B and located at the rear side of the first core rod 1-2, and the rear end positioning block is provided with a positioning block through groove 6-7 for the rear end of the core rod to be inserted, and a core rod positioning block 6-4 is provided in the positioning block through groove 6-7, and the core rod positioning block 6-4 is provided with a rear end slot 6-5 on the side facing the first core rod 1-2, and the core rod positioning block 6-4 is provided with a positioning hole 1 extending left and right, and the side wall of the rear end positioning block is provided with a positioning hole 2 penetrating at both ends; at the same time, it also includes a latch 6-3, and the latch 6-3 can be inserted into the positioning hole 1 and the positioning hole 2 at the same time; and the hole height of the positioning hole 1 and the hole height of the positioning hole 2 are both greater than the height of the latch 6-3. In this embodiment, the rear end positioning block is composed of a cover plate 6-1 and a base block 6-2, and the cover plate 6-1 and the base block 6-2 are detachably connected.

[0065] In this embodiment, a positioning hole 2 extending horizontally from left to right is respectively provided on the left and right sides of the rear end positioning block, and the positioning hole 2 is through-through from left to right; the latch 6-3 can be inserted into the left positioning hole 2, the positioning hole 1 and the right positioning hole 2 from left to right in sequence, thereby locking the position of the core rod positioning block 6-4. At the same time, we can also minimize the gap between the front and rear side walls of the latch 6-3 and the hole wall of the positioning hole 1, and reduce the gap between the front and rear side walls of the latch 6-3 and the hole wall of the positioning hole 2, so as to reduce the front and rear movement of the latch 6-3 and the core rod positioning block 6-4, and better lock the front and rear position of the core rod positioning block 6-4. Preferably, we can also make the latch 6-3 simultaneously and horizontally penetrate the rear end of the first core rod 1-2 placed in the rear end slot 6-5, and at this time, the positioning hole 1 is connected to the rear end slot 6-5.

[0066] Preferably, in this embodiment, since the hole height of positioning hole one and the hole height of positioning hole two are both greater than the height of the latch 6-3, the latch 6-3 and the core rod positioning block 6-4 can be moved up and down in the longitudinal direction, thereby achieving a slight up and down movement of the rear end of the first core rod 1-2 inserted into the core rod positioning block 6-4, and the up and down position of the rear half of the first core rod 1-2 can be adjusted, thereby adjusting the up and down spacing between the first core rod 1-2 and the first mold cavity wall, so that the distribution tube can be more smoothly pushed backward in the mold cavity after being sleeved outside the first core rod 1-2, thereby reducing the difficulty of the operator in pushing the distribution tube and reducing the risk of the distribution tube being stuck between the first core rod 1-2 and the first mold cavity wall during the backward pushing process.

[0067] At the same time, the rear end positioning assembly 6 also includes an elastic component 3 6-6, and the elastic component 3 6-6 is connected to the lower end of the core rod positioning block 6-4. Figure 4 As shown, in this embodiment, the elastic component 3 6-6 is a spring that can be vertically extended and retracted up and down. Before the distribution pipe is inserted into the mold cavity, the elastic component 3 6-6 supports the core rod positioning block 6-4 at a certain height, and the core rod placed in the mold cavity is slightly inclined with the front lower and the back higher.

[0068] During operation, we first push the distribution tube into the mold cavity and sleeve it on the outer ring of the first core rod 1-2, then the rear end of the distribution tube is against the outer wall of the latch 6-3, then the flip block 5-1 is flipped toward the first core rod 1-2, the front end of the first core rod 1-2 is inserted into the front end slot 5-2, and finally the front end of the automatic block 5-6 is inserted into the block slot 5-3. At this time, the first core rod 1-2 is locked between the core rod positioning block 6-4 and the flip block 5-1, and cannot be flipped or moved forward and backward. Through the above method and structure, we realize the positioning and locking of the position of the first core rod 1-2, reduce its displacement risk during the punching operation, and improve the alignment accuracy of the core rod punching on the first core rod 1-2 and the first core rod 1-2.

[0069] Likewise, the mandrel positioning mechanism in the second station assembly realizes positioning and locking of the second mandrel 2 - 2 in the same manner.

[0070] The structure of the core rod positioning mechanism is relatively simple, and the operation is simple, convenient and efficient for operators.

[0071] Preferably, this embodiment also includes a set of ejection rod assemblies for removing the dispensing tube from the mold cavity.

[0072] like Figure 1-2 As shown, the material return rod assembly in this embodiment includes two rod limit blocks 7-1, a rod 7-2 extending forward and backward, a connecting rod 7-3 extending left and right, a push rod 1 7-4 and a push rod 2 7-5.

[0073] The tie rod limit block 7-1 is arranged at the upper end of the lower mold frame B, and is located between the first station assembly and the second station assembly. The tie rod limit block 7-1 is provided with a movable socket that passes through the front and back, and the tie rod passes through the movable socket and extends forward and backward; the connecting rod 7-3 is connected to the tie rod 7-2 and is located at the rear side of the first station assembly and the second station assembly; the rear end of the push rod 1 7-4 and the rear end of the push rod 2 7-5 are both connected to the connecting rod 7-3; and the front end of the push rod 1 7-4 and the front end of the push rod 2 7-5 are respectively inserted from the back to the front into two different positioning block through grooves in the first station assembly and the second station assembly, as shown in FIG. Figure 1 shown.

[0074] When unloading the material, the operator turns the flip block in the opposite direction of the core rod, then grabs the pull rod 7-2 and pulls it forward, and the front end of the push rod 1 7-4 enters the positioning block slot 6-7 from the back to the front, and pushes the rear end of the distribution tube from the back, pushing the distribution tube forward for a distance, and the front part of the distribution tube exits the mold cavity, completing the unloading operation of the distribution tube; then, the operator holds the front end of the distribution tube and finally pulls the distribution tube out of the mold cavity to complete the unloading operation of the distribution tube. When there is a distribution tube in both the first mold cavity and the second mold cavity at the same time, after pulling the pull rod 7-2, the push rod 1 7-4 and the push rod 2 7-5 move forward at the same time, and the unloading operation of each distribution tube can be performed.

[0075] The material-returning pull rod assembly can realize a fast, convenient and efficient material-returning operation, thereby improving the operational efficiency of continuous punching of multiple distribution pipes.

[0076] Preferably, since the mold cavity component is composed of a pressing plate and a concave mold plate, and the two are separable and distributed up and down; in order to lock the relative positions of the pressing plate and the concave mold plate, we can add positioning guide pins and positioning grooves.

[0077] like Figure 2 As shown, we add one positioning guide post 5-1 in the first station assembly and two positioning guide posts 5-1 in the second station assembly.

[0078] In the first station assembly, the lower end of the positioning guide post 5-1 is fixedly connected to the first concave template 1-4, and a positioning groove running through the first pressing plate 1-3 is provided from top to bottom. The positioning guide post 5-1 runs through the corresponding positioning groove from bottom to top, thereby locking the relative position of the first pressing plate 1-3 and the first concave template 1-4. The two positioning guide posts 5-1 and the two positioning grooves in the second station assembly are used to lock the relative position of the second pressing plate 2-3 and the second concave template 2-4 in the same structure and manner. Of course, we can also choose to swap the positions of the positioning guide post 5-1 and the positioning groove, that is, the positioning guide post 5-1 is set at the lower end of the first pressing plate 1-3, and the positioning groove is set at the upper end of the first concave template 1-4.

[0079] In order to further enhance the pressing effect on the distribution tube during the punching process and ensure that the distribution tube does not deviate during the punching process, we can also add a top pressing component. Figure 2 As shown, in this embodiment, a top pressing assembly 1-6 with longitudinal retractability is added to the first station assembly on the left.

[0080] During the processing, when the top pressing assembly 1-6 contacts the top of the first pressing plate 1-3, the distribution tube will be pressed tightly into the first mold cavity through the first pressing plate 1-3 to ensure that it does not deviate during the punching process. Figure 1 As shown, in this embodiment, the top pressing assembly 1-6 visible in the figure is one, which is installed at the bottom of the upper mold frame A. However, when designing the actual mold, multiple top pressing assemblies 1-6 can be added according to the size of the mold and the length and width of the first pressing plate 1-3, and the distribution pipe can be pressed at multiple points to ensure processing accuracy.

[0081] The top pressure component 1-6 has elasticity and can also play a buffering role, unloading part of the upward rebound force when descending to the dead point, reducing damage to the machine and the mold. Its elastic function can be achieved by arranging a spring component in the top pressure component 1-6, or by adopting a piston device. In the present embodiment, the top pressure component 1-6 is composed of a built-in spring and a connecting press column. The upper end of the top pressure component 1-6 is a set with a spring inside, and the lower end of the set is connected to the press column. The bottom of the top pressure component 1-6 is placed above the first press plate 1-3 and higher than the lower end of the first punching punch 1-1, which can ensure that before the first punching punch 1-1 contacts the distribution pipe, the top pressure component 1-6 is pressed against the first press plate 1-3 to press the distribution pipe.

[0082] like Figure 2 As shown, two guide post assemblies C are located between the upper mold frame A and the lower mold frame B and are symmetrically distributed. The guide post assembly C can be composed of a guide sleeve, a guide post and a spring assembly, which plays a role in guiding the movement of the mold frame. At the same time, the guide sleeve and the guide post are nested during the processing and also play a preliminary positioning role. In this embodiment, the guide sleeve is installed on the upper mold frame A, and the embedding port faces the lower mold frame B; one end of the guide post is connected to the top of the lower mold frame B, and the other end faces the embedding port of the guide sleeve. As the upper mold frame A moves up and down, the guide post and the guide sleeve can be embedded or separated.

[0083] Preferably, we can also add an elastic component to facilitate the loosening of the pressing plate and the concave plate. Figure 2 As shown, in this embodiment, we set an elastic component 1-7 between the first pressing plate 1-3 and the first concave plate 1-4. After the punching is completed, during the upward reset movement of the upper mold frame A, the elastic component 1-7 can cause the first pressing plate 1-3 and the first concave plate 1-4 to loosen, making it convenient to unload the punched distribution tube from the mold cavity. In this embodiment, the elastic component 1-7 is a spring component with a built-in spring.

[0084] In this embodiment, a mold foot D is additionally provided at the lower end of the lower mold frame B to play a supporting role.

Claims

1. A punching die with a core rod positioning mechanism, characterized in that: It comprises an upper mold frame and a lower mold frame, wherein at least one set of station components is arranged between the upper mold frame and the lower mold frame; Each group of station components includes a longitudinally extending male mold, a core rod extending forward and backward, a cavity component connected to the upper end of the lower mold frame, and a core rod positioning mechanism; the upper end of the male mold is connected to the upper mold frame, and the lower end faces the core rod; a cavity extending forward and backward is provided in the cavity component, and a through hole is provided at the upper end of the cavity component for the male mold to pass through; the through hole is through from top to bottom and communicates with the cavity; the core rod is inserted into the cavity; The core rod positioning mechanism comprises a front end positioning component and a rear end positioning component respectively located at the front and rear sides of the mold cavity component; The front end positioning assembly includes a flip block located at the front side of the mandrel and flipped toward the front end of the mandrel, the flip block is flipped and connected to the lower mold frame, and a front end slot is provided on the side wall of the flip block facing the mandrel; a block pressing block is also provided on the left or right side of the flip block at the upper end of the lower mold frame, and an automatic block that can move laterally is connected to the block pressing block, and a block slot for the end of the automatic block to be embedded is provided on the side wall of the flip block facing the automatic block; The rear end positioning assembly includes a rear end positioning block connected to the upper end of the lower mold frame and located at the rear side of the mandrel, the rear end positioning block is provided with a positioning block through slot for the rear end of the mandrel to be inserted, a mandrel positioning block is provided in the positioning block through slot, the mandrel positioning block is provided with a rear end slot on the side facing the mandrel, a positioning hole 1 extending left and right is provided on the mandrel positioning block, and a positioning hole 2 penetrating at both ends of the left and right is provided on the side wall of the rear end positioning block; It also includes a latch pin, which is inserted into the first positioning hole and the second positioning hole transversely at the same time; and the hole height of the first positioning hole and the hole height of the second positioning hole are both greater than the height of the latch pin.

2. A punching die with a core rod positioning mechanism according to claim 1, characterized in that: The lower end of the core rod positioning block is also connected to an elastic component three.

3. A punching die with a core rod positioning mechanism according to claim 1 or 2, characterized in that: The workstation components are divided into two groups, namely a first workstation component and a second workstation component which are arranged side by side on the left and right; It also includes a material return pull rod assembly; the material return pull rod assembly includes a pull rod limit block, a pull rod extending front and rear, a connecting rod extending left and right, a push rod 1 and a push rod 2; The pull rod limit block is arranged at the upper end of the lower mold frame, and is located between the first station assembly and the second station assembly; the pull rod limit block is provided with a movable socket that passes through the front and back, and the pull rod passes through the movable socket; the connecting rod is located at the rear side of the first station assembly and the second station assembly and is connected to the pull rod; the push rod one and the push rod two are both connected to the connecting rod; and the front ends of the push rod one and the push rod two are respectively inserted into different positioning block grooves from back to front.

4. A punching die with a core rod positioning mechanism according to claim 3, characterized in that: The mold cavity component comprises a pressing plate and a concave mold plate which are distributed up and down, and the mold cavity is placed between the pressing plate and the concave mold plate; the through hole is located at the upper end of the pressing plate.

5. A punching die with a core rod positioning mechanism according to claim 4, characterized in that: It also includes a longitudinally extending positioning guide post and a positioning groove for the positioning guide post to be inserted into; The lower end of the positioning guide column is fixedly connected to the concave template, and the positioning groove is arranged at the lower end of the pressing plate; or the upper end of the positioning guide column is fixedly connected to the lower end of the pressing plate, and the positioning groove is arranged at the upper end of the concave template.

6. A punching die with a core rod positioning mechanism according to claim 5, characterized in that: It also includes an elastic component 1 for causing the concave mold plate and the pressing plate to loosen; the elastic component 1 is arranged between the concave mold plate and the pressing plate; It also includes at least one longitudinally retractable pressing assembly, the upper end of which is connected to the lower end of the upper mold frame, and the bottom of which is placed above the pressing plate and higher than the lower end of the punch.

7. A punching die with a core rod positioning mechanism according to claim 6, characterized in that: The mold cavity component in the first station assembly is a first mold cavity component, and the mold cavity component in the second station assembly is a second mold cavity component; The length of the first cavity member is greater than the length of the second cavity member; A movable angle fixing block is also provided on the front side of the second mold cavity component, and a locking pin which can lock the existing hole on the product is provided on the angle fixing block.

8. A punching die with a core rod positioning mechanism according to claim 7, characterized in that: A guide column assembly is also provided between the upper mold frame and the lower mold frame.

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