A triangular needle electrical discharge machining device

Abstract

The present invention belongs to the technical field of triangular needle processing, and discloses a triangular needle electric discharge processing device, including a fixed seat, a rotary table, a rotary motor, a needle-up mechanism, three groups of grinding and punching mechanisms and a needle-down mechanism, the rotary table is rotatably connected to the top of the fixed seat and connected to the rotary motor, the needle-up mechanism, three groups of grinding and punching mechanisms, and the needle-down mechanism are sequentially distributed in a circular array outside the rotary table, and eight groups of needle clamping mechanism groups distributed in a circular array are provided on the rotary table, each group of needle clamping mechanism groups includes at least one needle clamping mechanism, and each needle clamping mechanism includes a clamping seat and a needle clamping device. The present invention distributes the needle-up mechanism, three groups of grinding and punching mechanisms and the needle-down mechanism in a circular array outside the rotary table, and integrates the functions of needle-up, three-faceted punching and grinding, and needle-down, without the need for frequent transfer between multiple sets of equipment, simplifies the operation process, shortens the processing cycle, and improves production efficiency.

Description

Technical Field

[0001] The invention belongs to the technical field of triangular needle processing, and in particular relates to a triangular needle electrical discharge processing device. Background Art

[0002] When producing and processing a medical triangular needle, the hollow round stainless steel tube is usually cut into a fixed-length needle body, and one end of the needle body is rolled into a closed cone structure using a specific processing equipment, and then the end is ground into a triangular cone with three facets, and finally the three facets are respectively subjected to electric spark discharge drilling to connect them with the cavity inside the needle body for infusion. Before processing the triangular needle, the needle body needs to be clamped and fixed, and the first facet is first ground and discharged. After the processing is completed, the needle body is rotated 120° in turn to process the second and third facets. The existing triangular needle processing device has a single functional structure and can usually only realize a single processing of drilling or grinding the needle body, or can only perform drilling and grinding processing on a single facet of the triangular needle. This processing method often requires multiple sets of processing equipment to cooperate with each other, and the operation process is cumbersome, the processing cycle is long, the production efficiency is low, and it is very inconvenient to use. Therefore, it is urgently needed to provide a triangular needle processing device that integrates the punching and grinding functions of three edges to simplify the operation process, shorten the processing cycle, and improve production efficiency. Summary of the invention

[0003] In view of the deficiencies in the background technology, the present invention provides a three-edged needle processing device integrating the punching and grinding functions of three edges, so as to simplify the operation process, shorten the processing cycle and improve the production efficiency.

[0004] To achieve the above purpose, the technical solution of the present invention is as follows:

[0005] A triangular needle electrical discharge machining device, characterized in that it includes a fixed seat, a rotary worktable, a rotary motor, an upper needle mechanism, three groups of grinding and drilling mechanisms and a lower needle mechanism, the rotary worktable is rotatably connected to the top of the fixed seat and connected to the rotary motor, the upper needle mechanism, three groups of grinding and drilling mechanisms, and the lower needle mechanism are distributed in a circular array on the outer side of the rotary worktable in sequence, each group of the grinding and drilling mechanisms includes a grinding mechanism and a drilling mechanism, the rotary worktable is provided with eight groups of needle clamping mechanism groups distributed in a circular array, each group of needle clamping mechanism groups includes at least one needle clamping mechanism, each of the needle clamping mechanisms includes a clamping seat and a needle clamping device, the needle clamping device is radially arranged along the rotary worktable and rotatably connected to the clamping seat, each of the needle clamping devices is transmission-connected with a dividing gear, a fan gear is provided between each adjacent two groups of grinding and drilling mechanisms, the fan gear is connected to the fixed seat and cooperates with each dividing gear, when any one of the dividing gears is engaged with the fan gear until the two are separated, the dividing gear drives the needle clamping device to rotate 120°.

[0006] Preferably, the needle body clamping mechanism also includes a locking mechanism for fixing the needle clamping device, the locking mechanism includes a positioning pin, a positioning pin lifting and adjusting device and a circular dividing plate sleeved on the needle clamping device, the positioning pin is located above the circular dividing plate and is connected to the positioning pin lifting and adjusting device, and the outer periphery of the circular dividing plate is evenly distributed with three positioning grooves that can cooperate with the positioning pin.

[0007] Preferably, the positioning pin lifting and lowering adjustment device includes a guide seat, a top plate, a first spring and a lever control mechanism, the guide seat is arranged at the upper end of the clamping seat, the top plate is arranged at the upper end of the guide seat, the positioning pin is slidably connected to the guide seat up and down, and a stop ear is provided thereon, the first spring is sleeved on the positioning pin and is located between the stop ear and the top plate, the lever control mechanism includes a lever, a pressure wheel and a fan-shaped pressure plate, the lever is rotatably connected to the guide seat, one end of the lever is connected to the stop ear, and the other end is rotatably connected to the pressure wheel, the fan-shaped pressure plate is connected to the fixed seat, the pressure wheel is rollingly matched with the lower end face of the arc-shaped convex strip arranged at the outer peripheral edge of the fan-shaped pressure plate, and the two ends of the arc-shaped convex strip are provided with a first sloped surface.

[0008] Preferably, the needle clamping device includes a jacket and a sleeve arranged outside the jacket, one end of the jacket is a conical structure composed of at least two movable parts and having a needle clamping groove in the middle, which expands outward, and a groove is provided between each two adjacent movable parts. The sleeve is a hollow structure with two openings at both ends, and an inner wall at one end is provided with an inner conical surface matching the conical structure, and the other end is provided with a control component for controlling the expansion and contraction of the conical structure, the control component includes a pull rod, a second spring and a baffle, one end of the pull rod is connected to the jacket, and the other end passes through the sleeve and is connected to the baffle, the second spring is sleeved on the pull rod and is located between the baffle and the end of the sleeve away from the conical structure, and the end of the pull rod passes through the baffle and is connected to an upper needle cylinder.

[0009] Preferably, the needle raising mechanism includes a support plate and a support frame located on one side of the support plate, a needle box and a needle feeding mechanism are sequentially arranged on the support frame from top to bottom, a needle box is provided with a needle drop port at the bottom of the needle box, a needle supporting frame is provided directly below the needle feeding mechanism, and a needle pushing device matching the needle supporting frame is provided on one side of the needle supporting frame, the needle supporting frame includes a fixed needle frame, a movable needle frame connected to the fixed needle frame for upward and downward sliding, and an elastic guide assembly, the elastic guide assembly is connected between the fixed needle frame and the movable needle frame, and the needle supporting groove is composed of a fixed card slot arranged at the top of the fixed needle frame and a movable card slot arranged at the top of the movable needle frame.

[0010] Preferably, the needle pushing device includes a movable seat, a needle pushing member and a second driving device, one side of the movable seat is connected to the second driving device that drives it to slide horizontally along the bottom plate, and the other side is connected to the needle pushing member that cooperates with the needle support frame, the needle pushing member is provided with a pin hole, and a second roller is provided at its lower end, and the second roller cooperates with the second sloped surface provided on the top of the movable needle frame.

[0011] Preferably, the needle feeding mechanism includes a needle ring, a needle feeding seat and a needle feeding motor. The needle ring is a horizontally arranged cylindrical structure and is rotatably mounted on the needle feeding seat. The needle ring is connected to the needle feeding motor and has at least two needle feeding grooves parallel to its central axis evenly distributed on its outer circumference.

[0012] Preferably, the grinding mechanism includes a grinding support, on which a grinding assembly and a grinding adjustment mechanism for driving the grinding assembly to achieve three-axis motion are provided. The grinding assembly includes at least one grinding spindle, and a grinding wheel is installed at the end of each grinding spindle.

[0013] Preferably, the punching mechanism includes a punching support, a discharge punching assembly and a punching lifting drive device that drives the discharge punching assembly to slide up and down along the punching support, and the discharge punching assembly includes a punching frame and at least one working electrode, and at least one of the working electrodes is connected to the punching frame in an up and down sliding manner.

[0014] Preferably, the lower needle mechanism includes a lower needle support and a lower needle cylinder connected to a fixed seat, the lower needle cylinder cooperates with each group of needle clamping mechanisms, the lower needle support is provided with a lower needle rack and a needle clamping cylinder driving the lower needle rack to slide horizontally along the lower needle support, and the lower needle rack is provided with at least one needle clamping air claw.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] (1) The present invention arranges the needle loading mechanism, three sets of grinding and punching mechanisms and the needle lowering mechanism in a circular array on the outer side of the rotary table, integrating the functions of needle loading, three-faceted hole grinding and needle lowering, eliminating the need for frequent transfer between multiple sets of equipment, simplifying the operation process, shortening the processing cycle, and improving production efficiency;

[0017] (2) The present invention utilizes the meshing of the sector gear and the indexing gear to achieve 120° indexing rotation of each set of needle clamping devices, thereby ensuring the accuracy and convenience of switching the processing edges and guaranteeing product quality;

[0018] (3) The present invention uses the lever principle to cleverly utilize the cooperation between the pressure wheel and the arc-shaped convex strip to control the lifting and lowering of the positioning pin to adjust the locking and fixing of the needle clamping device, thereby effectively ensuring the stability of the triangular needle during the processing and grinding process and guaranteeing product quality;

[0019] (4) The needle clamping device of the present invention has a novel and reasonable structural design. The cylinder is used to apply thrust to the pull rod to control the contraction of the clamping sleeve to achieve the needle clamping function, which is convenient for needle insertion and removal and easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Other features, objectives and advantages of the present invention will become more apparent from a reading of the detailed description of non-limiting embodiments made with reference to the following accompanying drawings.

[0021] Figure 1 It is a schematic diagram of the structure of the present invention;

[0022] Figure 2 It is a schematic diagram of the connection structure of the components above the rotary worktable of the present invention;

[0023] Figure 3 For the present invention Figure 2 Another perspective structural diagram;

[0024] Figure 4 For the present invention Figure 3 The enlarged structural diagram at A in the middle;

[0025] Figure 5 It is a schematic diagram of the connection structure of the upper needle cylinder, the lower needle cylinder, the fan gear and the fixed seat of the present invention;

[0026] Figure 6 It is a structural schematic diagram of the needle clamping mechanism group of the present invention;

[0027] Figure 7 It is a schematic diagram of the structure of the needle clamping mechanism of the present invention;

[0028] Figure 8 It is a schematic cross-sectional structure diagram of a positioning pin and a positioning pin lifting and adjusting device of the present invention;

[0029] Fig. 9 It is a schematic diagram of the structure of the circular indexing plate of the present invention;

[0030] Fig.10 It is a schematic cross-sectional view of the needle clamping mechanism of the present invention;

[0031] Fig.11 This is a schematic diagram of the jacket structure of the present invention;

[0032] Fig.12 It is a schematic diagram of the structure of the needle-loading mechanism of the present invention;

[0033] Fig.13 For the present invention Fig.12 Another perspective structural diagram;

[0034] Fig.14 For the present invention Fig.12 Schematic diagram of local structure;

[0035] Fig.15 It is a schematic diagram of the connection structure between the needle box, the needle feeding mechanism and the needle support frame of the present invention;

[0036] Fig.16 This is a schematic diagram of the structure of the needle support frame and the needle pusher of the present invention;

[0037] Fig.17 This is a schematic diagram of the fixed needle holder structure of the present invention;

[0038] Fig.18 It is a schematic diagram of the structure of the movable needle holder of the present invention;

[0039] Fig.19 This is a schematic diagram of the connection structure between the needle ring and the needle feeding seat of the present invention;

[0040] Fig. 20 This is a schematic diagram of the needle feeding seat structure of the present invention;

[0041] Fig.21 It is a schematic diagram of the needle ring structure of the present invention;

[0042] Fig. 22 It is a schematic diagram of the cross-sectional structure of the needle box of the present invention;

[0043] Fig.23 This is a schematic diagram of the grinding mechanism structure of the present invention;

[0044] Fig.24 It is a schematic diagram of the punching mechanism structure of the present invention;

[0045] Fig.25 It is a structural schematic diagram of the needle lowering mechanism of the present invention;

[0046] Fig.26 This is a schematic diagram of the needle clamping air claw structure of the present invention;

[0047] In the figure: 1, fixed seat, 2, rotary worktable, 3, needle loading mechanism, 301, support plate, 302, support frame, 303, needle box, 30301, needle drop port, 304, fixed needle frame, 30401, fixed card slot, 305, movable needle frame, 30501, movable card slot, 306, movable seat, 307, needle pusher, 308, ejector hole, 309, second roller, 3010, second sloped surface, 3011, needle feeding ring, 3012, needle feeding seat, 3013, needle feeding motor, 3014, needle feeding slot, 4, needle lowering mechanism, 401, lower needle support, 402, lower needle frame, 403, needle clamping air Cylinder, 404, needle clamping air claw, 5, grinding mechanism, 501, grinding support, 502, grinding spindle, 503, grinding wheel, 504, fifth drive device, 505, sixth drive device, 506, seventh drive device, 6, punching mechanism, 601, punching support, 602, punching frame, 603, working electrode, 604, punching lifting drive device, 605, eighth drive device, 7, needle clamping mechanism, 701, clamping seat, 702, jacket, 70201, movable part, 70202, groove, 70203, needle clamping groove, 703, sleeve, 7031, inner cone, 704, pull rod, 7 05, second spring, 706, baffle, 707, upper needle cylinder, 8, indexing gear, 9, fan gear, 10, positioning pin, 11, circular indexing plate, 1101, positioning groove, 12, guide seat, 13, top plate, 14, first spring, 15, stop ear, 16, lever, 17, pressure wheel, 18, fan-shaped pressure plate, 19, arc-shaped convex strip, 1901, first slope surface, 20, transmission bracket, 21, vertical transmission shaft, 22, first bevel gear, 23, horizontal transmission shaft, 24, second bevel gear, 25, driving wheel, 26, driven wheel, 27, synchronous belt, 28, first roller, 29, guide rod, 30. The third spring, 31. The support rod, 32. The slide, 33. The lifting frame, 34. The first motor, 35. The first driving wheel, 36. The first driven wheel, 37. The first synchronous belt, 38. The first lead screw, 39. The first slide rail, 40. The second motor, 41. The second lead screw, 42. The second slide rail, 43. The second driven wheel, 44. The needle clamping slot, 45. The base, 46. The base plate, 47. The third cylinder, 48. The third slide rail, 49. The fourth cylinder, 50. The fourth slide rail, 51. The fixed shaft, 52. The dividing plate, 53. The lower needle cylinder, 54. The upper needle positioning plate, 55. The connecting rod, 56. The second synchronous belt. DETAILED DESCRIPTION

[0048] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0049] In the description of the present invention, it is necessary to understand that the terms "middle", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0050] In the present invention, unless otherwise clearly specified and limited, the terms "set", "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection; it can be a mechanical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0051] like Figure 1 As shown, a triangular needle discharge machining device includes a fixed seat 1, a rotary table 2, a rotary motor (not shown in the figure), a needle upper mechanism 3, three groups of grinding and punching mechanisms and a needle lower mechanism 4. The rotary table is rotatably connected to the top of the fixed seat and connected to the rotary motor. The rotary motor drives the rotary table to rotate. The needle upper mechanism, the three groups of grinding and punching mechanisms, and the needle lower mechanism are sequentially distributed in a circular array on the outer side of the rotary table. Each group of grinding and punching mechanisms includes a grinding mechanism 5 and a punching mechanism 6, that is, in clockwise or counterclockwise direction, they are the needle upper mechanism, the first grinding mechanism, the first punching mechanism, the second grinding mechanism, the second punching mechanism, the third grinding mechanism, the third punching mechanism and the needle lower mechanism. Figure 2 , Figure 3 As shown, eight groups of needle clamping mechanism groups are arranged in a circular array on the rotary workbench, and each group of needle clamping mechanism groups includes at least one needle clamping mechanism 7. In this embodiment, each group of needle clamping mechanism groups includes 4 needle clamping mechanisms, which is convenient for realizing the synchronous processing of 4 triangular needles. Each needle clamping mechanism includes a clamping seat 701 and a needle clamping device. The needle clamping device is arranged radially along the rotary workbench and is rotatably connected to the clamping seat. Each needle clamping device is transmission-connected with a dividing gear 8, combined with Figures 3 to 5As shown, a fan gear 9 is provided between each two adjacent groups of grinding and drilling mechanisms. There are two fan gears. The fan gear is connected to a fixed seat and cooperates with each indexing gear. All indexing gears are distributed in a circular array, and their meshing lines with the fan gears are located on the same circular line. When any indexing gear meshes with the fan gear, the indexing gear drives the needle clamping device to rotate 120° until the two are separated. During operation, the triangular needle to be processed is first clamped at the end of the needle clamping device through the needle upper mechanism, and the rotary motor drives the rotary table to rotate, and first passes through the first grinding mechanism and the first punching mechanism for grinding and punching, and completes the processing of the first surface of the triangular needle; then the needle clamping device holding the triangular needle rotates with the rotary table to the first fan gear, drives the indexing gear to rotate, drives the needle clamping device and the needle body to rotate 120°, and then passes through the second grinding mechanism and the second punching mechanism for grinding and punching, and completes the processing of the second surface of the triangular needle; then the indexing gear of the needle clamping device engages with the second fan gear again, and the needle clamping device and the needle body rotate 120° again, and then passes through the third grinding mechanism and the third punching mechanism for grinding and punching, and completes the processing of the third surface of the triangular needle; finally, it reaches the needle lowering mechanism to realize needle lowering, and the processing of the three surfaces of the triangular needle body is completed.

[0052] The needle clamping device mentioned above is connected to the indexing gear transmission, and its specific structure is as follows Figure 4 and Figure 6 As shown, a transmission bracket 20 is provided on the side of the clamping seat close to the fixed axis, and a vertical transmission shaft 21 is rotatably connected to the transmission bracket, one end of the vertical transmission shaft is connected to the indexing gear, and the other end is connected to the first bevel gear 22, and a horizontal transmission shaft 23 is rotatably connected between the transmission bracket and the clamping seat, one end of the horizontal transmission shaft is connected to the second bevel gear 24 meshing with the first bevel gear, and the other end is connected to a driving wheel 25, and the driving wheel is connected to a driven wheel 26 provided on the needle clamping device through a synchronous belt 27. When the fan gear drives the indexing gear to rotate, the indexing gear drives the first bevel gear to rotate through the vertical transmission shaft, and the first bevel gear drives the second bevel gear to rotate, and then drives the wheel to rotate through the horizontal transmission shaft, and the driving wheel drives the driven wheel to rotate through the synchronous belt, thereby driving the needle clamping device to rotate.

[0053] like Figures 6 to 9As shown, the needle body clamping mechanism also includes a locking mechanism for fixing the needle clamping device. When any one of the surfaces of the needle body is being processed, the locking mechanism can lock and fix the needle clamping device to prevent it from rotating; and when the fan gear is engaged with the indexing gear to drive the needle clamping device to rotate, the locking mechanism will release the fixation of the needle clamping device. The locking mechanism includes a positioning pin 10, a positioning pin lifting and adjusting device, and a circular indexing plate 11 sleeved on the needle clamping device. The positioning pin is located above the circular indexing plate and is connected to the positioning pin lifting and adjusting device. The outer circumference of the circular indexing plate is evenly spaced with three positioning grooves 1101 that can be connected to the positioning pin to ensure that the needle clamping device drives the needle body to rotate 120° each time. The positioning pin lifting and adjusting device includes a guide seat 12, a top plate 13, a first spring 14 and a lever control mechanism. The guide seat is arranged at the upper end of the clamping seat, the top plate is arranged at the upper end of the guide seat, and the positioning pin It is connected to the guide seat for sliding up and down movement, and is provided with a stop ear 15. The first spring is sleeved on the positioning pin and is located between the stop ear and the top plate. The lever control mechanism includes a lever 16, a pressure wheel 17 and a fan-shaped pressure plate 18. The lever is rotatably connected to the guide seat. One end of the lever is rotatably connected to a first roller 28, which contacts the lower end surface of the stop ear. The other end is rotatably connected to the pressure wheel. The fan-shaped pressure plate is connected to the fixed seat. The pressure wheel rolls with the lower end surface of the arc-shaped convex strip 19 provided at the outer peripheral edge of the fan-shaped pressure plate. Both ends of the arc-shaped convex strip are provided with a first slope surface 1901, as shown in FIG. Figure 3 and Figure 4 As shown, when the needle clamping device drives the needle body to perform indexing rotation (after processing one of the surfaces of the needle body, it needs to rotate 120° to process the next surface), the pressure wheel first enters the first sloped surface at one end of the arc-shaped convex strip, gradually pushing the lever downward, driving the stop ear and the positioning pin to move upward, so that they are disengaged from the positioning groove of the circular indexing disk, and releasing the locking and fixation of the needle clamping device, so as to facilitate the subsequent engagement of the fan gear and the indexing gear to achieve indexing. When the needle clamping device of each group of needle clamping mechanism groups has all rotated 120°, the pressure wheel drives away from the first sloped surface at the other end of the arc-shaped convex strip, the downward pressure on the first roller disappears, and the stop ear and the positioning pin are reset under the action of the first spring, that is, the positioning pin is embedded in the positioning groove of the circular indexing disk again, locking and fixing the needle clamping device. In this embodiment, all the needle clamping mechanisms of each group of needle clamping mechanism groups share one pressure wheel, and the levers of the four needle body clamping mechanisms are connected by a connecting rod 55, and the pressure wheel is rotatably connected to the top of the connecting rod, which not only reduces the cost but also ensures the stability of the indexing. Since two indexing operations are required during the processing of the triangular needle, two convex strips are provided on the fan-shaped pressing plate.

[0054] A fixed shaft 51 fixedly connected to the fixed seat is provided through the center of the rotary table. The rotary table rotates at the upper end of the fixed seat with the fixed shaft as the central axis. The fan-shaped pressure plate is fixedly connected to the fixed shaft, and a dividing plate 52 is provided below it in parallel. The dividing plate is composed of two fan-shaped plates and a circular plate. The two fan-shaped plates are symmetrically distributed on both sides of the circular plate. Two fan gears are fixed to the edge of one of the circular plates. The upper needle cylinder and the lower needle cylinder 53 are both located on the other fan-shaped plate. Figure 5 As shown, the upper needle cylinder and the lower needle cylinder are not connected to any pull rod of the needle clamping device, but they cooperate with each other. When the upper needle or lower needle is operated, the output shaft of the upper needle cylinder or the lower needle cylinder extends and contacts with the corresponding pull rod to apply pressure, which can control the expansion and contraction of the needle clamping sleeve at the end of the needle clamping device, wherein the upper needle cylinder is slidably connected to the upper needle positioning plate 54, the upper needle positioning plate is fixed on the dividing plate, and a fifth cylinder (not shown in the figure) connected to the upper needle cylinder is provided. In this embodiment, the upper needle cylinder is provided with two output heads, which can cooperate with two pull rods at a time. When the fifth cylinder drives it to translate, it can cooperate with the other two pull rods, and the lower needle cylinder is provided with four output heads, thereby realizing the use of one upper needle cylinder and one lower needle cylinder to control four needle clamping mechanisms at the same time, saving costs and improving processing efficiency.

[0055] Combination Figure 7 , Fig.10 and Fig.11 As shown, the needle clamping device includes a jacket 702 and a sleeve 703 arranged outside the jacket, one end of the jacket is a conical structure composed of at least two active parts 70201 with a needle clamping groove 70203 in the middle and expanding outward, a groove 70202 is provided between each two adjacent active parts, the sleeve is a hollow structure with two ends open, an inner wall of one end is provided with an inner conical surface 7031 matching the conical structure, and the other end is provided with a control component for controlling the expansion and contraction of the conical structure, the control component includes a pull rod 704, a second spring 705 and a baffle 706, one end of the pull rod is connected to the jacket, and the other end passes through the sleeve and is connected to the baffle, the second spring is sleeved on the pull rod and is located between the baffle and the end of the sleeve away from the conical structure, the end of the pull rod passes through the baffle and is connected to the upper needle cylinder 707. When the upper needle cylinder pushes the pull rod, so that it overcomes the second spring and drives the jacket to move to the outside of the rotary table, the movable part expands outward under its own elasticity, and the needle body can be placed in the needle clamping groove or taken out of the needle clamping groove; on the contrary, when the upper needle cylinder is separated from the pull rod, the pull rod is reset under the action of the second spring, that is, the jacket is driven to move toward the center of the rotary table, and the movable part is squeezed by the inner cone surface to move toward the middle, so that the needle body in the needle clamping groove at the center is clamped and fixed, and the needle body cannot be taken out of the needle clamping groove. In this embodiment, the second spring adopts a disc spring, and the position of the baffle on the pull rod can be freely adjusted, and a threaded connection can be adopted, so that the second spring can be used to adjust the force balance between the pull rod, the jacket and the sleeve.

[0056] like Figures 12 to 15 As shown, the needle loading mechanism includes a support plate 301 and a support frame 302 located on one side of the support plate. The support frame is provided with a needle box 303 and a needle feeding mechanism from top to bottom. The bottom of the needle box is provided with a needle drop port 30301. Fig. 22 As shown, the needle box is a hollow structure with an open top, a narrow rectangular parallelepiped structure at the top, and an inverted cone-shaped vertical section at the bottom. The inner cavity size matches the size of the needle body. Figures 19 to 21 As shown, the needle feeding mechanism includes a needle ring 3011, a needle feeding seat 3012 and a needle feeding motor 3013. The needle ring is a horizontally arranged cylindrical structure and is rotatably mounted on the needle feeding seat. The needle ring is connected to the needle feeding motor, and at least two needle feeding grooves 3014 are evenly spaced and parallel to its central axis on its outer circumference. The length direction of the needle feeding groove is consistent with the placement direction of the needle body in the needle box. The needle feeding seat is a hollow cylindrical structure matching the needle ring. The needle feeding seat is sleeved on the outside of the needle ring. The gap between the needle ring and the inner wall of the needle feeding seat is smaller than the diameter of the needle body. The upper end of the needle feeding seat is provided with an upper opening corresponding to the lower needle port, and the lower end is provided with a lower opening for the needle body to fall. A needle support frame is provided directly below the needle feeding mechanism, and a needle pushing device matching the needle support frame is provided on one side of the needle support frame.

[0057] Combination Figures 16 to 18 As shown, the needle support frame includes a fixed needle frame 304, a movable needle frame 305 slidably connected to the fixed needle frame up and down, and an elastic guide component, the elastic guide component is connected between the fixed needle frame and the movable needle frame, the needle support groove is composed of a fixed card slot 30401 arranged at the top of the fixed needle frame and a movable card slot 30501 arranged at the top of the movable needle frame, the elastic guide component includes a guide rod 29 and a third spring 30, the guide rod is installed on the fixed needle frame, the movable needle frame is slidably connected to the guide rod, the third spring is sleeved on the guide rod and is located between the fixed needle frame and the movable needle frame, when the movable needle frame is subjected to When the external environment exerts downward pressure on it, it can move downward along the guide rod. The fixed needle holder is an L-shaped structure composed of a support and a vertical plate connected vertically. The guide rod is vertically arranged on the support, and the movable needle holder is sleeved on the guide rod. A support rod 31 is arranged on the vertical plate. The support rod is connected with a slide groove 32 arranged on the movable needle holder. The cooperation between the support rod and the slide groove can enhance the stability of the movement of the movable needle holder. The elastic guide component is in a natural state, and the fixed card slot and the movable card slot are on the same straight line. One end of the whole body that falls from the lower opening of the needle feeding seat is located in the fixed card slot, and the other end is located in the movable card slot. Combined with Fig.14 , Fig.15As shown, the needle pushing device includes a movable seat 306, a needle pushing member 307 and a second driving device. One side of the movable seat is connected to a second driving device that drives it to slide horizontally along the bottom plate, and the other side is connected to a needle pushing member that cooperates with the needle support frame. The needle pushing member is provided with an ejector hole 308, and a second roller 309 is provided at the lower end thereof. The ejector hole is located on the extension line of the fixed card slot. The second roller cooperates with a second sloped surface 3010 provided on the top of the movable needle frame. When the second driving device drives the needle pushing member to move toward the side of the fixed needle frame, one end of the needle body is inserted into the ejector The second roller is in contact with the upper end surface of the movable needle holder. As the needle pushing member continues to translate, the second roller enters the second sloped surface to drive the movable needle holder to move downward. At this time, the needle body is disengaged from the movable slot, and the needle pushing member pushes the needle body to move toward the side of the fixed needle holder until it is inserted into the needle clamping mechanism. After the needle pushing member reaches the predetermined position, the needle feeding drive mechanism drives it to reset. Under the action of the third spring, the movable needle holder returns to its original state. The vertical cross-sections of the needle feeding slot and the needle supporting slot are both V-shaped, and their sizes correspond to the needle body to be processed.

[0058] like Fig.12 and Fig.13 As shown, a first driving device is provided on the support frame for driving the needle box and the needle feeding mechanism to synchronously lift and lower the support frame (in the Z-axis direction). A lifting frame 33 is slidably connected to the support frame, and the needle box and the needle feeding mechanism are both installed on the lifting frame. The first driving device adopts a motor-screw transmission mechanism, which specifically includes a first motor 34, a first driving wheel 35, a first driven wheel 36, a first synchronous belt 37, a first screw 38, and a first slide rail 39. The first motor drives the first driving wheel to rotate, and the first driving wheel drives the first driven wheel to rotate through the synchronous belt. The first driven wheel is connected to the first screw and drives it to rotate. The lifting frame is threadedly connected to the screw and is slidably connected to the first slide rail provided on the support frame, thereby realizing the synchronous lifting and lowering of the needle box and the needle feeding mechanism, ensuring that the needle falling from the opening under the needle feeding seat of the needle feeding mechanism accurately falls into the needle supporting groove of the needle supporting frame. The lifting and lowering movement of the needle box and the needle feeding mechanism also facilitates the maintenance of each component. In this embodiment, the second driving device also adopts a motor-screw transmission mechanism, specifically including a second motor 40, a second screw 41, a second slide rail 42, a second driving wheel (not shown in the figure), and a second driven wheel 43. The movable frame is threadedly connected to the second screw and is slidingly connected to the second slide rail on the bottom plate. The second screw is rotatably connected to the support frame and connected to the second driven wheel. The second driven wheel is connected to the second driving wheel through a second synchronous belt 56. The second driving wheel is connected to the second motor. The second motor drives the second driving wheel to rotate, which in turn drives the second driven wheel and the second screw to rotate, thereby driving the movable frame and the needle pusher connected thereto to move horizontally back and forth.

[0059] The working principle of the needle loading mechanism is as follows: the staff puts the needle body to be processed into the top of the needle box, and the needle body falls from the needle drop port, and falls into the needle feeding groove at the top of the needle ring through the upper opening of the needle feeding seat. The needle feeding motor drives the needle ring to rotate, and then the needle body at the bottom of the needle box falls into the needle feeding groove at the top of the rotated needle ring again, and so on, so that the needle bodies to be processed in the needle box are separated one by one, and when the needle feeding groove carrying the needle body rotates to the bottom, the needle body falls from the lower opening into the needle supporting groove of the needle supporting frame, and then the needle pushing device pushes the needle body to the needle clamping mechanism on one side of it, and the needle clamping mechanism clamps and fixes the needle body, thereby realizing the needle loading function.

[0060] like Fig.12 and Fig.13 As shown, a base 45 is arranged below the support frame, and a substrate 46 and a third driving device for driving the substrate to slide horizontally (in the Y-axis direction) are slidably connected to the base. The support frame is installed on the substrate, and the bottom plate is slidably connected to the upper end of the substrate. A fourth driving device for driving the bottom plate to slide horizontally (in the X-axis direction) is arranged on the substrate. In this embodiment, the third driving device includes a third cylinder 47 and a third slide rail 48. The third cylinder is connected to the substrate, and the substrate is slidably connected to the third slide rail arranged on the base, so as to realize the horizontal movement of the support frame, the bottom plate, the needle box, the needle feeding mechanism, and the needle support frame as a whole. The fourth driving device includes a fourth cylinder 49 and a fourth slide rail 50. The fourth cylinder is connected to the bottom plate, and the bottom plate is slidably connected to the fourth slide rail arranged on the substrate, so as to realize the horizontal movement of the support frame needle support frame and adjust the distance between it and the needle clamping mechanism, that is, the sliding direction of the substrate on the base and the sliding direction of the bottom plate on the substrate are perpendicular to each other.

[0061] like Fig.23 As shown, the grinding mechanism includes a grinding support 501, on which a grinding component and a grinding adjustment mechanism for driving the grinding component to realize three-axis motion are provided. The grinding component includes at least one grinding spindle 502, which is an electric spindle with a built-in motor. A grinding wheel 503 is installed at the end of each grinding spindle. In this embodiment, the grinding spindle and the grinding wheel are respectively divided into two groups, which can grind the triangular needle bodies on the four needle clamping mechanisms in each needle clamping mechanism group. In order to realize that each grinding wheel is responsible for grinding the needle bodies on two needle clamping mechanisms and to realize the adjustment of the grinding wheel position, the grinding The grinding adjustment mechanism can drive the grinding assembly to perform three-axis motion, using the fifth drive device 504 (motor screw drive structure) to realize the X-axis direction (in this embodiment, the radial direction of the rotary table), using the sixth drive device 505 (motor screw drive structure) to realize the Y-axis direction (horizontal movement direction perpendicular to the X-axis direction) and using the seventh drive device 506 (motor screw drive structure) to realize the Z-axis direction (vertical movement direction perpendicular to the X-axis and Y-axis). The motor screw drive structure is an existing technology for realizing linear motion and will not be repeated here.

[0062] like Fig.24As shown, the punching mechanism includes a punching support 601, a discharge punching assembly, and a punching lifting drive device 604 that drives the discharge punching assembly to slide up and down along the punching support. The punching lifting drive device adopts a motor screw drive structure to drive the discharge punching assembly to slide up and down along the slide rail. The specific structure will not be repeated. In this embodiment, the punching support is divided into two parts, and a cylinder slide rail drive structure is used between the upper and lower parts to achieve horizontal sliding of the two (radial horizontal sliding along the rotary table). It will not be repeated in detail. The discharge punching assembly includes a punching frame 602 and at least one working electrode 603. At least one working electrode is connected to the punching frame for sliding up and down. In this embodiment, four working electrodes 603 for electric spark discharge are provided, and their number and position match the four needle clamping mechanisms of each group of needle clamping mechanisms. Each working electrode is driven by the eighth drive device 605 to move up and down along the punching frame. The eighth drive device 605 also adopts a motor screw drive structure. During the drilling operation, the working electrode is the electrode, and the workpiece (i.e., the triangular needle body) is the negative electrode. The working electrode moves up and down continuously, performing pulse spark discharge on the workpiece, etching the metal and achieving the purpose of drilling. This method is a prior art and will not be described in detail here.

[0063] like Fig.25 and Fig.26 As shown, the lower needle mechanism includes a lower needle support 401 and a lower needle cylinder 53 connected to a fixed seat, the lower needle cylinder cooperates with the pull rod of each group of needle clamping mechanism groups, the lower needle support is provided with a lower needle frame 402 and a needle clamping cylinder 403 which drives the lower needle frame to slide horizontally along the lower needle support (movement in the X-axis direction, i.e. radial movement along the rotary table), the lower needle frame is provided with at least one needle clamping claw 404, the needle clamping claw is a product purchased on the market, and its clamping end is provided with a needle clamping slot 44 which matches the triangular needle.

[0064] The present invention defines the needle-up mechanism as the first station, the first grinding mechanism, the first punching mechanism, the second grinding mechanism, the second punching mechanism, the third grinding mechanism, the third punching mechanism and the needle-down mechanism as the second station, the third station, the fourth station, the fifth station, the sixth station, the seventh station and the eighth station. The specific steps of processing the triangular needle using the present invention are as follows:

[0065] S1, needle loading: stack the triangular needle bodies to be processed in the two needle boxes 303 of the needle loading mechanism 3 in sequence, and the lowermost needle body falls into the uppermost needle feeding groove 3014 of the needle feeding ring 3011 through the needle drop port 30301 and the upper opening of the needle feeding seat 3012. The lifting frame 33 is controlled to descend to the specified position through the first driving device. At this time, the lower opening of the needle feeding seat 3012 is located directly above the needle drop groove, and the needle feeding motor 3013 drives the needle feeding ring 3011 to rotate, and the needle bodies in the needle box fall into the needle feeding groove of the needle feeding ring 3011 one by one, until the first needle body in the needle feeding ring falls into the needle supporting groove of the needle supporting frame. At this time, the needle loading cylinder 707 works, and the pull rod 704 is implemented The thrust force is applied to cause the end of the jacket 702 to expand outward, and at the same time, the second driving device drives the needle pusher 307 to move toward the side of the fixed needle holder 304, and the end of the needle body is embedded in the ejector hole 308 of the needle pusher, and the needle pusher 307 drives the needle body to move toward the jacket 702 until it is inserted into the jacket, and then the second driving device drives the needle pusher 307 to reset, and at the same time the needle cylinder 707 is reset, and the needle clamping device clamps and fixes the needle body, and the needle-loading work of two of the needle clamping mechanisms is completed at this time; then the third driving device drives the base plate 46 to slide horizontally, and the needle-loading mechanism is translated to the positions of the other two needle clamping mechanisms of the needle clamping mechanism group, and the above method is used to load the needle;

[0066] S2, grinding and drilling the first edge: start the rotary motor to drive the rotary table 2 to rotate counterclockwise, rotate to the second station, use the grinding adjustment mechanism to move the grinding wheel 503 to the two needle bodies to be polished for grinding, and then translate to grind the other two needle bodies; after the grinding is completed, the rotary table 2 continues to rotate to the third station to drill the first edge;

[0067] S3, first rotation indexing: when the pressure wheel 17 enters the sloped surface of the first arc-shaped convex strip 19, the lever 16 is pressed down, driving the stop ear 15 and the positioning pin 10 to move upward, so that they are separated from the positioning groove 1101 of the circular indexing disk 11, and the locking and fixing of the needle clamping device are released. Then, each indexing gear 8 of the needle clamping mechanism group is meshed with the fan gear 9 in turn to drive each needle clamping device to complete a 120° rotation. When the pressure wheel 17 is separated from the arc-shaped convex strip 19, the stop ear 15 and the positioning pin 10 are reset under the action of the first spring 14, that is, the positioning pin 10 is embedded in the positioning groove 1101 of the circular indexing disk 11 again, and the needle clamping device is locked and fixed. At this point, the rotation indexing of the needle body is completed, and the second edge surface to be processed is facing directly upward;

[0068] S4, grinding and drilling the second edge surface: the rotary motor drives the rotary table 2 to rotate counterclockwise to the 4th station to grind the second edge surface; after the grinding is completed, the rotary table continues to rotate to the 5th station to drill the second edge surface;

[0069] S5, second rotation indexing: when the pressing wheel 17 enters the sloped surface of the second arc-shaped convex strip 19, the locking and fixing of the positioning pin 10 on the clamping device is released, and then each indexing gear 8 of the clamping mechanism group is meshed with the fan gear 9 in turn to drive each clamping device to complete another 120° rotation, and at this time, the third edge to be processed faces upward;

[0070] S6, grinding and drilling the third edge surface: the rotary motor drives the rotary table 2 to rotate counterclockwise to the 6th station to grind the second edge surface; after the grinding is completed, the rotary table continues to rotate to the 5th station to drill the second edge surface;

[0071] S7, needle insertion: the rotary table continues to rotate to the 8th station, and the needle inserting cylinder 53 applies a thrust to the pull rods of the four needle body clamping mechanisms, so that the movable part of the jacket is opened and the needle body is clamped and removed by the needle clamping claws, thereby completing the purpose of needle insertion.

[0072] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes that fall within the meaning and scope of the equivalent elements of the claims are included in the present invention.

Claims

1. A triangular needle electrical discharge machining device, characterized in that: The present invention relates to a method for producing a plurality of grinding and drilling devices, wherein the plurality of grinding and drilling devices are respectively provided with a plurality of grinding and drilling devices and a plurality of grinding and drilling devices, and the plurality of grinding and drilling devices are respectively provided with a plurality of grinding and drilling devices and a plurality of grinding and drilling devices. 20°, the needle upper mechanism includes a support plate and a support frame located on one side of the support plate, the support frame is provided with a needle box and a needle feeding mechanism from top to bottom in sequence, the bottom of the needle box is provided with a needle drop port, a needle supporting frame is provided directly below the needle feeding mechanism, and one side of the needle supporting frame is provided with a needle pushing device matching therewith, the needle supporting frame includes a fixed needle frame, a movable needle frame connected to the fixed needle frame for upward and downward sliding movement, a needle supporting groove and an elastic guide component, the elastic guide component is connected between the fixed needle frame and the movable needle frame, the needle supporting groove is composed of a fixed card slot arranged at the top of the fixed needle frame and a movable card slot arranged at the top of the movable needle frame, the needle pushing device includes a movable seat, a needle pushing member and a second driving device, one side of the movable seat is connected to a second driving device that drives it to slide horizontally along the bottom plate, and the other side is connected to a needle pushing member that cooperates with the needle supporting frame, the needle pushing member is provided with a pin hole, and a second roller is provided at its lower end, and the second roller cooperates with the second sloped surface arranged at the top of the movable needle frame.

2. A triangular needle electrical discharge machining device as claimed in claim 1, characterized in that: The needle clamping mechanism also includes a locking mechanism for fixing the needle clamping device, and the locking mechanism includes a positioning pin, a positioning pin lifting and adjusting device, and a circular dividing plate sleeved on the needle clamping device. The positioning pin is located above the circular dividing plate and is connected to the positioning pin lifting and adjusting device. The outer circumference of the circular dividing plate is evenly distributed with three positioning grooves that can cooperate with the positioning pin.

3. A triangular needle electrical discharge machining device as claimed in claim 2, characterized in that: The positioning pin lifting and lowering adjustment device includes a guide seat, a top plate, a first spring and a lever control mechanism, the guide seat is arranged at the upper end of the clamping seat, the top plate is arranged at the upper end of the guide seat, the positioning pin is slidably connected with the guide seat up and down, and a stop ear is provided thereon, the first spring is sleeved on the positioning pin and is located between the stop ear and the top plate, the lever control mechanism includes a lever, a pressure wheel and a fan-shaped pressure plate, the lever is rotatably connected to the guide seat, one end of the lever is connected to the stop ear, and the other end is rotatably connected to the pressure wheel, the fan-shaped pressure plate is connected to the fixed seat, the pressure wheel is rollingly matched with the lower end surface of the arc-shaped convex strip arranged at the outer peripheral edge of the fan-shaped pressure plate, and the two ends of the arc-shaped convex strip are provided with a first slope surface.

4. A triangular needle electrical discharge machining device as claimed in claim 1, characterized in that: The needle clamping device includes a jacket and a sleeve arranged outside the jacket, one end of the jacket is a conical structure composed of at least two movable parts, with a needle clamping groove in the middle and expanding outward, and a groove is provided between each two adjacent movable parts. The sleeve is a hollow structure with two openings at both ends, and an inner conical surface matching the conical structure is provided on the inner wall of one end, and a control component for controlling the expansion and contraction of the conical structure is provided on the other end. The control component includes a pull rod, a second spring and a baffle, one end of the pull rod is connected to the jacket, and the other end passes through the sleeve and is connected to the baffle, the second spring is sleeved on the pull rod and is located between the baffle and the end of the sleeve away from the conical structure, and the end of the pull rod passes through the baffle and is connected to the upper needle cylinder.

5. A triangular needle electrical discharge machining device as claimed in claim 1, characterized in that: The needle feeding mechanism includes a needle ring, a needle feeding seat and a needle feeding motor. The needle ring is a horizontally arranged cylindrical structure and is rotatably mounted on the needle feeding seat. The needle ring is connected to the needle feeding motor and has at least two needle feeding grooves evenly spaced on its outer circumference and parallel to its central axis.

6. A triangular needle electrical discharge machining device as claimed in claim 1, characterized in that: The grinding mechanism comprises a grinding support, on which a grinding assembly and a grinding adjustment mechanism for driving the grinding assembly to realize three-axis motion are arranged. The grinding assembly comprises at least one grinding spindle, and a grinding wheel is installed at the end of each grinding spindle.

7. A triangular needle electrical discharge machining device as claimed in claim 1, characterized in that: The punching mechanism includes a punching support, a discharge punching assembly and a punching lifting drive device that drives the discharge punching assembly to slide up and down along the punching support. The discharge punching assembly includes a punching frame and at least one working electrode. At least one of the working electrodes is connected to the punching frame in an up and down sliding manner.

8. A triangular needle electrical discharge machining device as claimed in claim 1, characterized in that: The lower needle mechanism includes a lower needle support and a lower needle cylinder connected to a fixed seat, the lower needle cylinder cooperates with each group of needle clamping mechanisms, the lower needle support is provided with a lower needle rack and a needle clamping cylinder driving the lower needle rack to slide horizontally along the lower needle support, and the lower needle rack is provided with at least one needle clamping air claw.

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