Punching equipment for pipe fitting

Abstract

The invention provides pipe fitting punching equipment which comprises a press and a punching die, a buoyancy lift mechanism, a pushing mechanism and a rotating mechanism which are arranged on a press workbench, the press is matched with the punching die for punching, and the pushing mechanism is arranged on one side of the punching die and used for driving the rotating mechanism to move. The rotating mechanism is connected with or separated from workpieces on the punching die and the floating lifting mechanism, the floating lifting mechanism is used for transferring feeding and discharging, and the rotating mechanism is arranged on the pushing mechanism, used for driving the workpieces to rotate and comprises a clamping jaw assembly used for grabbing the workpieces; the punching die comprises a knife edge inlet block, and a plurality of punch inlet holes are formed in the knife edge inlet block in the axial direction of the workpiece. According to the multi-hole punching die, multi-hole machining of the pipe fitting can be completed in one step, hole machining of the workpiece in the same radial direction is completed in each time of punching, the production efficiency and the production quality are improved, the structure of the punching die is simplified, the strength of the knife edge inlet block and the core rod is guaranteed, consumables are reduced, and the production cost is saved.

Description

Technical Field

[0001] The invention relates to the technical field of punching equipment, in particular to a punching equipment for pipe fittings. Background Art

[0002] Precision round tubes and fittings are used in the manufacture of some mechanical equipment, such as those used in automotive steering systems. These precision tubes are circumferentially equipped with multiple rows of holes, each with a varying number of holes. They require high dimensional accuracy and small diameters. Using traditional presses for step-by-step punching makes it difficult to control product dimensions, and each step only punches a single hole. Punching a tube requires multiple steps, and debugging consumes significant manpower and material resources, resulting in high manufacturing costs, low production efficiency, and unstable processing quality, resulting in poor production quality.

[0003] In addition, some punching equipment has multiple blades on the side of the core rod of the punching die, which can punch multiple holes in one step. However, the structure of this punching die is complex, and due to the small diameter of the pipe fitting, the strength of the blade entering the block is poor, which is easily damaged and requires frequent replacement and maintenance, which increases consumables and affects production efficiency.

[0004] Invention content

[0005] The invention aims to provide a punching device for pipe fittings to overcome the deficiencies in the prior art.

[0006] In order to solve the above technical problems, the new technical solution of the present invention is: a punching device for pipe fittings, including a press and a punching die, a lifting mechanism, a pushing mechanism, and a rotating mechanism arranged on the press workbench. The output end of the press is connected to the punching die and cooperates with the punching die for punching. The pushing mechanism is arranged on one side of the punching die, and is used to drive the rotating mechanism to move, so that the rotating mechanism is connected to or separated from the punching die and the workpiece on the lifting mechanism. The lifting mechanism is arranged between the punching die and the pushing mechanism, and is used for loading and unloading transfer. The rotating mechanism is arranged on the pushing mechanism, and is used to drive the workpiece to rotate, including a clamping claw assembly for grabbing the workpiece; the punching die is arranged in the middle position of the press workbench, and includes a blade entry block, and the blade entry block is provided with a plurality of punch entry holes arranged along the axial direction of the workpiece.

[0007] Furthermore, in the above-mentioned punching equipment for pipe fittings, the punching die also includes a core rod, the blade entry block is arranged at the end of the core rod, and the blade entry block and the end of the core rod form a cylinder that is adapted to the inner side of the workpiece.

[0008] Furthermore, in the above-mentioned punching equipment for pipe fittings, a notch is provided at one end of the core rod, a mounting groove is provided on the notch, the blade entry block is provided at the notch, and the lower end of the blade entry block is embedded in the mounting groove.

[0009] Furthermore, in the aforementioned pipe punching device, one end of the mandrel is further provided with a waste discharge port located below the blade entry block, the waste discharge port being in communication with the punch entry hole, and the bottom of the waste discharge port being a material guiding inclined surface. Preferably, the waste discharge port is provided with a waste guide trough fixed to the lower die assembly on the outer side thereof, the waste guide trough being arranged at an angle.

[0010] Furthermore, in the above-mentioned punching equipment for pipe fittings, the punching die also includes an upper die assembly and a lower die assembly, the upper die assembly is connected to the output end of the press, the lower die assembly is arranged below the upper die assembly, and a receiving groove for accommodating the workpiece is provided between the upper die assembly and the lower die assembly; when the die is closed, the receiving groove is adapted to the outside of the workpiece, and the core rod is inserted in the receiving groove.

[0011] Furthermore, in the punching equipment for the above-mentioned pipe fittings, the upper die assembly includes an upper die connecting plate, an upper die plate, and an upper die floating plate. An upper die plate is provided below the upper die connecting plate. The upper die floating plate is provided below the upper die plate and is elastically connected to the upper die plate through a nitrogen spring; a plurality of punches corresponding to the punch entry holes are provided on the upper die plate, the lower end of the punch is inserted into the upper die floating plate and is slidably connected to the upper die floating plate, and a top stop boss is also provided at the upper end of the punch, and the top stop boss limits the lower position of the punch in the upper die plate.

[0012] Furthermore, in the above-mentioned punching equipment for pipe fittings, the punching die also includes a selection component arranged on the upper die assembly, and the selection component controls a corresponding number of punches for punching according to the number of holes in the same radial direction on the workpiece, so as to control the number of punchings per punching.

[0013] Furthermore, in the above-mentioned punching equipment for pipe fittings, the selection component includes a selection cylinder and a slider, the output end of the selection cylinder is provided with a slider, the upper mold component is provided with a slide groove, the slider is inserted in the slide groove and is slidably connected to the slide groove, and the slider is provided above the punch, the bottom surface of the slider abuts against the top surface of the punch, and the lower end of the slider is provided with an avoidance groove, and the upper end of the punch located below the avoidance groove can rise into the avoidance groove.

[0014] Furthermore, in the above-mentioned punching equipment for pipe fittings, the lower die assembly is fixed on the press workbench, and includes a lower die base plate and a lower die plate. The lower die plate is arranged above the lower die base plate, and the accommodating groove includes a semicircular groove located in the middle of the upper end of the lower die plate and an arc groove located in the middle of the lower end of the upper die floating plate. Both ends of the arc groove are provided with flares extending outward.

[0015] Furthermore, in the above-mentioned punching equipment for pipe fittings, the punching die also includes a fixed seat, which is arranged on the bottom plate of the lower die and abuts against the lower die plate, and the fixed seat protrudes from the top surface of the lower die plate, one end of the core rod is inserted in the fixed seat, and the other end extends out of the fixed seat and is inserted into the semicircular groove of the lower die plate, and the core rod is coaxially arranged with the semicircular groove.

[0016] Furthermore, in the above-mentioned punching equipment for pipe fittings, the lifting mechanism includes a lifting cylinder, a transfer seat plate, and a stop block. The lifting cylinder is installed on the base plate, and a transfer seat plate is provided at its output end. The base plate is installed above the workbench of the press. An arc-shaped groove for placing the workpiece is provided in the middle of the transfer seat plate. A stop plate is provided at one end of the arc-shaped groove close to the punching die, and a positioning plate is inlaid at the other end of the arc-shaped groove. The positioning plate is inserted into a positioning groove of the workpiece to position the placement angle of the workpiece.

[0017] Furthermore, in the above-mentioned punching equipment for pipe fittings, the pushing mechanism includes a pushing base plate, a linear module, and a pushing plate. A linear module is provided above the pushing base plate, a pushing plate is provided at the output end of the linear module, and the rotating mechanism is provided above the pushing plate.

[0018] Furthermore, in the above-mentioned punching equipment for pipe fittings, the rotating mechanism also includes a rotating rod, a support shaft seat, and a servo motor. The servo motor is fixed at one end of the pushing plate, and the support shaft seat is fixed at the other end of the pushing plate. A bearing seat is provided on the support shaft seat. The rotating rod is inserted into the bearing seat and is rotatably connected to the bearing seat. One end of the rotating rod is connected to the output end of the servo motor through a coupling, and the other end is connected to the clamping jaw assembly.

[0019] Furthermore, in the aforementioned pipe punching device, the clamping jaw assembly includes a rotating cylinder and clamping jaws. The rotating cylinder is a circular cylinder having a groove at its end adapted to fit the outer side of the workpiece. The end of the rotating cylinder is also provided with a plurality of clamping jaws arranged circumferentially along the rotating cylinder. The plurality of clamping jaws are arranged corresponding to the second positioning groove at the end of the workpiece. The end of the clamping jaw is provided with an insert extending axially along the rotating cylinder. The insert is shaped to fit the second positioning groove and is inserted into the second positioning groove. Preferably, the thickness of the insert is less than the thickness of the workpiece wall and does not protrude from the inner arm and outer wall of the workpiece.

[0020] Furthermore, the above-mentioned punching equipment for pipe fittings also includes a pushing mechanism, which is arranged on the hole mold and is used to push the workpiece out of the punching mold.

[0021] Furthermore, the above-mentioned punching equipment for pipe fittings, the pushing mechanism includes a pushing cylinder, a pushing seat plate, a guide rod, and a pushing rod. The pushing cylinder is fixed to the lower mold base plate through a cylinder mounting seat, and its output end is connected to the pushing seat plate. Linear bearings are provided at both ends of the pushing seat plate, one end of the guide rod is connected to the fixed seat, and the other end is inserted in the linear bearing and slidably connected to the linear bearing. A plurality of pushing rods are provided in the middle of the pushing seat plate, and the plurality of pushing rods are arranged along the outer peripheral side of the core rod, and the outer peripheral side of the core rod is provided with an arc slide corresponding to the pushing rod, and the pushing rod is partially embedded in the arc slide and slidably connected to the arc slide.

[0022] Compared with the prior art, the beneficial effects of the new invention are: the invention can complete the multi-hole punching processing of pipe fittings in multiple times in one step, and each punching completes the hole processing in the same radial direction on the outer peripheral side of the workpiece, without multiple debugging, and the processing quality is stable, which improves production efficiency and production quality. That is, it is suitable for the situation where there are multiple rows of holes with the same number of holes in each row, and it is also suitable for the situation where there are multiple rows of holes with different numbers of holes in each row. It has better flexibility and a wider range of use; and only one blade entry block and one punch for punching direction need to be set, which simplifies the structure of the punching die and ensures the strength of the blade entry block and the core rod, especially for the case where the aperture of the pipe fitting is small, reduces consumables and saves production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the new embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments recorded in the new embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0024] Figure 1 This is a schematic structural diagram of the punching equipment for the novel pipe fitting of the present invention;

[0025] Figure 2 Schematic diagram of the punching die structure of the punching equipment of the new pipe fitting of the present invention Figure 1 ;

[0026] Figure 3 Schematic diagram of the punching die structure of the punching equipment of the new pipe fitting of the present invention Figure 2 ;

[0027] Figure 4 For the present invention Figure 3 A cross-sectional structural diagram;

[0028] Figure 5 For the present invention Figure 3 Schematic diagram of the cross-section structure of B;

[0029] Figure 6 This is a schematic diagram of the blade entry block and mandrel structure of the punching equipment for the new pipe fitting of the present invention;

[0030] Figure 7 This is a schematic diagram of the structure of the floating mechanism of the punching equipment for the new pipe fitting of the present invention;

[0031] Figure 8 This is a schematic structural diagram of the pushing mechanism and rotating mechanism of the punching equipment for the new pipe fitting of the present invention;

[0032] Figure 9 This is a schematic structural diagram of the clamping jaw assembly of the punching equipment for the new pipe fitting of the present invention;

[0033] In the figure: 1, press; 11, press workbench; 12, bottom plate;

[0034] 2. Punching die; 21. Blade entry block; 211. Punch entry hole; 22. Mandrel; 221. Mounting slot; 222. Waste discharge port; 223. Arc chute; 23. Upper die assembly; 231. Upper die connecting plate; 232. Upper die plate; 233. Upper die floating plate; 234. Nitrogen spring; 235. Punch; 2351. Stop boss; 24. Lower die assembly; 241. Lower die base plate; 242. Lower die plate; 25. Selection assembly; 251. Selection cylinder; 252. Slider; 2521. Avoidance groove; 253. Chute; 26. Receiving slot; 27. Fixing seat; 28. Waste guide chute;

[0035] 3. Floating mechanism; 31. Floating cylinder; 32. Transfer seat plate; 33. Stop block; 34. Positioning plate;

[0036] 4. Pushing mechanism; 41. Pushing base plate; 42. Linear module; 43. Pushing plate;

[0037] 5. Rotating mechanism; 51. Rotating cylinder; 511. Groove; 52. Clamping jaw; 521. Insert; 53. Rotating rod; 54. Support shaft seat; 55. Servo motor; 56. Bearing seat;

[0038] 6. Pushing mechanism; 61. Pushing cylinder; 62. Pushing seat plate; 63. Guide rod; 64. Pushing rod;

[0039] 101. Positioning groove one; 102. Positioning groove two. DETAILED DESCRIPTION

[0040] The following will be combined with the accompanying drawings of the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0041] Example 1

[0042] like Figure 1-9 As shown, a punching device for pipe fittings includes a press 1 and a punching die 2, a lifting mechanism 3, a pushing mechanism 4, and a rotating mechanism 5 arranged on a press workbench 11. The output end of the press 1 is connected to the punching die 2 and cooperates with the punching die 2 for punching. The pushing mechanism 4 is arranged on one side of the punching die 2, and is used to drive the rotating mechanism 5 to move, so that the rotating mechanism 5 is connected to or separated from the punching die 2 and the workpiece on the lifting mechanism 3. The lifting mechanism 3 is arranged between the punching die 2 and the pushing mechanism 4 for loading and unloading transfer. The rotating mechanism 5 is arranged on the pushing mechanism 4, and is used to drive the workpiece to rotate, including a clamping claw assembly for grabbing the workpiece; the punching die 2 is arranged in the middle position of the press workbench 11, and includes a blade entry block 21. The blade entry block 21 is provided with a plurality of punch entry holes 211 arranged along the axial direction of the workpiece, that is, the punch entry holes 211 correspond to the holes to be processed in the same radial direction on the outer peripheral side of the workpiece, and the number of punch entry holes 211 is equal to the number of rows of holes on the workpiece. The punching die 2, the lifting mechanism 3, and the rotating mechanism 5 are arranged in sequence along the pushing direction of the pushing mechanism 4. During processing, the workpiece blank is placed on the lifting mechanism 3, and then the pushing mechanism 4 is started to drive the rotating mechanism 5 close to the lifting mechanism. The clamping claw assembly grabs the blank on the lifting mechanism 3, the lifting mechanism 3 descends, and the pushing mechanism 4 continues to push forward to send the blank into the punching die 2, and process the holes to be processed in the same radial direction on the outer peripheral side of the workpiece to complete one punching; then, the rotating mechanism 5 drives the blank to rotate, and punches the holes to be processed in other directions on the outer peripheral side of the workpiece in turn to complete all hole processing of the workpiece; the workpiece after processing is sent to the lifting mechanism 3 to wait for unloading.

[0043] The present invention can complete the punching process of the pipe fitting in multiple times in one step, and completes the hole processing in the same radial direction on the outer peripheral side of the workpiece each time, without multiple debugging, and the processing quality is stable, thereby improving production efficiency and production quality; and only one blade entry block and one punch for punching direction need to be provided, which simplifies the structure of the punching die and ensures the strength of the blade entry block and the core rod, especially for the case where the aperture of the pipe fitting is small, reduces consumables and saves production costs.

[0044] like Figure 4 、 6As shown, the punching die 2 also includes a core rod 22, and the blade entry block 21 is arranged at the end of the core rod 22. The blade entry block 21 and the end of the core rod 22 form a cylinder that is compatible with the inner side of the workpiece. During processing, the workpiece is sleeved on the outside of the cylinder to coaxially position the workpiece.

[0045] Specifically, a notch is provided at one end of the core rod 22, and a mounting groove 221 is provided on the notch. The blade entry block 21 is provided at the notch, and the lower end of the blade entry block 21 is embedded in the mounting groove 221 to ensure that the blade entry block 21 and the core rod 22 are firmly connected.

[0046] In addition, if Figure 2 、 5 As shown in Figure 6, to facilitate waste discharge, one end of the mandrel 22 is provided with a waste discharge port 222 located below the blade entry block 21. This port 222 communicates with the punch entry hole 221, and the bottom of this port 222 is formed into a sloped guide surface. To further facilitate waste discharge, a waste guide trough 28 secured to the lower die assembly 24 is provided on the outside of the waste discharge port 222. This slanted guide trough 28 also prevents waste from falling onto the equipment and affecting its normal operation.

[0047] like Figure 2-5 As shown, the punching die 2 also includes an upper die assembly 23 and a lower die assembly 24. The upper die assembly 23 is connected to the output end of the press 1, and the lower die assembly 24 is arranged below the upper die assembly 23. A receiving groove 26 for receiving the workpiece is provided between the upper die assembly 23 and the lower die assembly 24. When the die is closed, the receiving groove 26 is adapted to the outside of the workpiece, and the core rod 22 is inserted into the receiving groove 26. The receiving groove 26 cooperates with the core rod 22 to position the workpiece.

[0048] The upper mold assembly 23 includes an upper mold connecting plate 231, an upper mold plate 232, and an upper mold floating plate 233. The upper mold connecting plate 231 is provided with an upper mold plate 232. The upper mold floating plate 233 is provided below the upper mold plate 232 and is elastically connected to the upper mold plate 232 through a nitrogen spring 234. The upper mold plate 232 is provided with a plurality of punches 235 corresponding to the punch entry holes 211. The lower end of the punch 235 is inserted into the upper mold floating plate 233 and is slidably connected to the upper mold floating plate 233. The upper end of the punch 235 is also provided with a stop boss 2351. The stop boss 2351 limits the lower position of the punch 235 in the upper mold plate 232.

[0049] In addition, if Figure 2 、 3As shown in Figure 5, the punching die 2 also includes a selection component 25 provided on the upper die assembly 23. The selection component 25 controls the corresponding number of punches to perform punching according to the number of holes in the same radial direction on the outer peripheral side of the workpiece, thereby controlling the number of punchings per punching. The selection component 25 includes a selection cylinder 251 and a slider 252. The output end of the selection cylinder 251 is provided with a slider 252. A slide groove 253 is provided in the upper die assembly 23, which is specifically provided at the bottom of the upper die connecting plate 231. The slider 252 is inserted into the slide groove 253 and is connected to the upper die connecting plate 231. The slide groove 253 is slidably connected, and the slider 252 is arranged above the punch 235. The bottom surface of the slider 252 abuts against the top surface of the punch 235, limiting the upper position of the punch 235 in the upper template 232. The slider 252 cooperates with the top stop boss 2351 to limit the punch. The lower end of the slider 252 is provided with an avoidance groove 2521. The upper end of the punch 235 located below the avoidance groove 2521 can rise into the avoidance groove 2521. The punch is in a floating state and there is no impact force at the lower end, so that the punch 235 does not punch a hole during punching.

[0050] In this embodiment, the outer side of the workpiece has two rows of holes, one row with 6 holes and the other row with 3 holes, and the number of punch entry holes is 2. When there is only one hole in the radial direction of the workpiece, the cylinder 251 is activated to drive the slider 252 to move so that the avoidance groove 2521 is located above the punch 235 that is not being punched. It can be seen that by selecting the configuration of the component 25, when the workpiece has different numbers of holes in the same radial direction, there is no need to replace the blade entry block during processing. It can adapt to situations where the number of holes in each row is the same, and it can also adapt to situations where the number of holes in each row is different, which provides greater flexibility, a wider range of applications, and improved production efficiency.

[0051] In addition, if Figure 2-5 As shown, the lower die assembly 24 is fixed to the press worktable 11 and comprises a lower die base plate 241 and a lower die plate 242. The lower die plate 242 is positioned above the lower die base plate 241. The receiving groove 26 comprises a semicircular groove located in the middle of the upper end of the lower die plate 242 and an arcuate groove located in the middle of the lower end of the upper die floating plate 233. Both ends of the arcuate groove are provided with outwardly extending flares to facilitate downward pressing of the arcuate groove into the workpiece. Furthermore, a guide rod is provided between the upper die plate 232 and the upper die floating plate 233. Positioning rods are provided on the upper and lower die assemblies 23 and 24 for positioning the upper and lower dies.

[0052] like Figure 2-5 As shown, the punching die 2 also includes a fixed seat 27, which is arranged on the lower die bottom plate 241 and abuts against the lower die plate 242, and the fixed seat 27 protrudes from the top surface of the lower die plate. When the workpiece is sent into the accommodating groove, it can be limited by the top stop of the fixed seat. One end of the core rod 22 is inserted in the fixed seat 27, and the other end extends out of the fixed seat 27 and is inserted into the semicircular groove of the lower die plate 242. The core rod 22 is coaxially arranged with the semicircular groove.

[0053] Example 2

[0054] Based on the structure of Example 1, Figure 1 、 7 As shown, the floating mechanism 3 includes a floating cylinder 31, a transfer seat plate 32, and a stop block 33. The floating cylinder 31 is installed on the base plate 12, and its output end is provided with a transfer seat plate 32. The base plate 12 is installed above the press workbench 11. The floating mechanism 3, the punching die 2, and the pushing mechanism 4 are all provided on the base plate 12 to facilitate the overall installation of the equipment. The middle part of the transfer seat plate 32 is provided with an arc-shaped groove for placing the workpiece. The end of the arc-shaped groove close to the punching die 2 is provided with a stop plate 33, and the other end of the arc-shaped groove is inlaid with a positioning plate 34. The positioning plate 34 is inserted into a positioning groove 101 of the workpiece to position the placement angle of the workpiece, which is convenient for docking with the clamping jaw assembly. In addition, a sensor for detecting the presence or absence is also provided at the bottom of the arc-shaped groove.

[0055] like Figure 1 、 8 As shown, the pushing mechanism 4 includes a pushing base plate 41, a linear module 42, and a pushing plate 43. The linear module 42 is provided above the pushing base plate 41, and the pushing plate 43 is provided at the output end of the linear module 42. The rotating mechanism 5 is provided above the pushing plate 43. In this embodiment, the linear module is a ball screw linear module driven by a servo motor, but is not limited thereto.

[0056] like Figure 1 、 8 As shown, the rotating mechanism 5 also includes a rotating rod 53, a support shaft seat 54, and a servo motor 55. The servo motor 55 is fixed to one end of the pushing plate 43, and the support shaft seat 54 is fixed to the other end of the pushing plate 43. A bearing seat 56 is provided on the support shaft seat 54. The rotating rod 53 is inserted into the bearing seat 56 and is rotatably connected to the bearing seat 56. One end of the rotating rod 53 is connected to the output end of the servo motor 55 through a coupling, and the other end is connected to the clamping jaw assembly.

[0057] like Figure 8 、 9 As shown, the clamping assembly includes a rotating cylinder 51 and a clamping jaw 52. The rotating cylinder 51 is a circular cylinder with a groove 511 at its end that matches the outer side of the workpiece. The rotating cylinder 51 also has multiple clamping jaws 52 arranged circumferentially along the rotating cylinder 51. These multiple clamping jaws 52 are arranged corresponding to the second positioning groove 102 at the end of the workpiece. The end of the clamping jaw 52 is provided with an insert 521 extending axially along the rotating cylinder 51. The shape of the insert 521 matches the second positioning groove 102 and is inserted into the second positioning groove 102. The thickness of the insert 521 is less than the thickness of the workpiece wall and does not protrude from the inner arm or outer wall of the workpiece, which facilitates the clamping assembly to grasp the workpiece without scratching the equipment.

[0058] In addition, if Figure 1-3 As shown, the above-mentioned pipe punching equipment further includes a pushing mechanism 6 , which is provided on the lower die assembly 24 and is used to push the workpiece out of the accommodating groove 26 . The pushing mechanism 6 includes a pushing cylinder 61, a pushing seat plate 62, a guide rod 63, and a pushing rod 64. The pushing cylinder 61 is fixed on the lower mold base plate 241 through a cylinder mounting seat, and its output end is connected to the pushing seat plate 62. Linear bearings are provided at both ends of the pushing seat plate 62. One end of the guide rod 63 is connected to the fixed seat 27, and the other end is inserted in the linear bearing and slidably connected to the linear bearing. A plurality of pushing rods 64 are provided in the middle of the pushing seat plate 62. In this embodiment, there are 3 pushing rods 64, and the plurality of pushing rods 64 are arranged along the outer peripheral side of the core rod 22. The outer peripheral side of the core rod 22 is provided with an arc-shaped slide groove 223 corresponding to the pushing rod 64. The pushing rod 64 is partially embedded in the arc-shaped slide groove 223 and is slidably connected to the arc-shaped slide groove 233. When the workpiece is punched, the clamping jaw assembly is connected to the workpiece, and the pushing mechanism 6 and the pushing mechanism 4 are started simultaneously to push the workpiece in the punching die onto the floating mechanism 3 and wait for unloading.

[0059] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and it is intended that all variations within the meaning and range of equivalents of the claims be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0060] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A punching device for pipe fittings, characterized in that: It includes a press and a punching die, a lifting mechanism, a pushing mechanism, and a rotating mechanism arranged on the press workbench. The output end of the press is connected to the punching die and cooperates with the punching die for punching. The pushing mechanism is arranged on one side of the punching die and is used to drive the rotating mechanism to move, so that the rotating mechanism is connected to or separated from the punching die and the workpiece on the lifting mechanism. The lifting mechanism is arranged between the punching die and the pushing mechanism and is used for loading and unloading transfer. The rotating mechanism is arranged on the pushing mechanism and is used to drive the workpiece to rotate, including a clamping claw assembly for grabbing the workpiece; the punching die is arranged in the middle position of the press workbench and includes a blade entry block, and the blade entry block is provided with a plurality of punch entry holes arranged along the axial direction of the workpiece.

2. The punching device for pipe fittings according to claim 1, characterized in that: The punching die also includes a core rod, and the blade entry block is arranged at the end of the core rod. The blade entry block and the end of the core rod form a cylinder that is adapted to the inner side of the workpiece.

3. The punching device for pipe fittings according to claim 2, characterized in that: One end of the core rod is provided with a notch, the notch is provided with a mounting groove, the blade entry block is arranged at the notch, and the lower end of the blade entry block is embedded in the mounting groove.

4. The punching device for pipe fittings according to claim 2, characterized in that: One end of the core rod is also provided with a waste discharge port located below the blade entry block, the waste discharge port is communicated with the punch entry hole, and the bottom of the waste discharge port is a material guiding slope.

5. The punching device for pipe fittings according to claim 2, characterized in that: The punching die also includes an upper die assembly and a lower die assembly. The upper die assembly is connected to the output end of the press, and the lower die assembly is arranged below the upper die assembly. A receiving groove for accommodating a workpiece is provided between the upper die assembly and the lower die assembly. When the die is closed, the receiving groove is adapted to the outside of the workpiece, and the core rod is inserted into the receiving groove.

6. The punching device for pipe fittings according to claim 5, characterized in that: The upper mold assembly includes an upper mold connecting plate, an upper mold plate, and an upper mold floating plate. An upper mold plate is provided below the upper mold connecting plate. The upper mold floating plate is provided below the upper mold plate and is elastically connected to the upper mold plate through a nitrogen spring. A plurality of punches corresponding to the punch entry holes are provided on the upper mold plate. The lower end of the punch is inserted into the upper mold floating plate and is slidably connected to the upper mold floating plate. A top stop boss is also provided at the upper end of the punch. The top stop boss limits the lower position of the punch in the upper mold plate.

7. The punching device for pipe fittings according to claim 6, characterized in that: The punching die also includes a selection component arranged on the upper die component, and the selection component controls a corresponding number of punches to perform punching according to the number of holes in the same radial direction on the workpiece, so as to control the number of punchings per punching.

8. The punching device for pipe fittings according to claim 7, characterized in that: The selection component includes a selection cylinder and a slider. The output end of the selection cylinder is provided with a slider. The upper mold component is provided with a slide groove. The slider is inserted into the slide groove and is slidably connected to the slide groove. The slider is provided above the punch, and the bottom surface of the slider abuts against the top surface of the punch. The lower end of the slider is provided with an avoidance groove. The upper end of the punch located below the avoidance groove can rise into the avoidance groove.

9. The punching device for pipe fittings according to claim 6, characterized in that: The lower mold assembly is fixed on the press workbench and includes a lower mold base plate and a lower mold plate. The lower mold plate is arranged above the lower mold base plate. The accommodating groove includes a semicircular groove located in the middle of the upper end of the lower mold plate and an arc groove located in the middle of the lower end of the upper mold floating plate. Both ends of the arc groove are provided with flares extending outward.

10. The pipe punching device according to claim 9, characterized in that: The punching die also includes a fixed seat, which is arranged on the bottom plate of the lower die and abuts against the lower die plate, and the fixed seat protrudes from the top surface of the lower die plate. One end of the core rod is inserted into the fixed seat, and the other end extends out of the fixed seat and is inserted into the semicircular groove of the lower die plate. The core rod and the semicircular groove are coaxially arranged.

11. The punching device for pipe fittings according to claim 1, characterized in that: The lifting mechanism includes a lifting cylinder, a transfer seat plate, and a stop block. The lifting cylinder is installed on the base plate, and a transfer seat plate is provided at its output end. The base plate is installed above the press workbench. An arc-shaped groove for placing the workpiece is provided in the middle of the transfer seat plate. A stop plate is provided at one end of the arc-shaped groove close to the punching die, and a positioning plate is inlaid at the other end of the arc-shaped groove. The positioning plate is inserted into a positioning groove of the workpiece to position the placement angle of the workpiece.

12. The pipe punching device according to claim 1, characterized in that: The pushing mechanism includes a pushing base plate, a linear module, and a pushing plate. The linear module is provided above the pushing base plate, the output end of the linear module is provided with a pushing plate, and the rotating mechanism is provided above the pushing plate.

13. The pipe punching device according to claim 11, characterized in that: The rotating mechanism also includes a rotating rod, a supporting shaft seat, and a servo motor. The servo motor is fixed to one end of the pushing plate, and the supporting shaft seat is fixed to the other end of the pushing plate. A bearing seat is provided on the supporting shaft seat. The rotating rod is inserted into the bearing seat and is rotatably connected to the bearing seat. One end of the rotating rod is connected to the output end of the servo motor through a coupling, and the other end is connected to the clamping claw assembly.

14. The punching device for pipe fittings according to claim 13, characterized in that: The clamping jaw assembly includes a rotating cylinder and a clamping jaw. The rotating cylinder is a circular cylinder, and a groove is provided at its end to match the outer side of the workpiece. The end of the rotating cylinder is also provided with a plurality of clamping jaws arranged along the circumference of the rotating cylinder. The plurality of clamping jaws are arranged corresponding to the second positioning groove at the end of the workpiece. The end of the clamping jaw is provided with an insert extending axially along the rotating cylinder. The shape of the inserting jaw is adapted to the second positioning groove and is plugged into the second positioning groove.

15. The pipe punching device according to any one of claims 1 to 14, characterized in that: It also includes a pushing mechanism, which is arranged on the hole die and is used to push the workpiece out of the punching die.

16. The pipe punching device according to claim 15, characterized in that: The pushing mechanism includes a pushing cylinder, a pushing seat plate, a guide rod, and a pushing rod. The pushing cylinder is fixed to the lower mold base plate through a cylinder mounting seat, and its output end is connected to the pushing seat plate. Linear bearings are provided at both ends of the pushing seat plate. One end of the guide rod is connected to the fixed seat, and the other end is inserted in the linear bearing and slidably connected to the linear bearing. A plurality of pushing rods are provided in the middle of the pushing seat plate. The plurality of pushing rods are arranged along the outer peripheral side of the core rod, and the outer peripheral side of the core rod is provided with an arc slide corresponding to the pushing rod. The pushing rod is partially embedded in the arc slide and slidably connected to the arc slide.

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