Drilling device for nodular iron casting machining

Abstract

The invention relates to the technical field of nodular cast iron casting machining, in particular to a drilling device for nodular cast iron casting machining, which comprises a workbench for machining nodular cast iron, a drill bit arranged above the workbench and a spray head arranged on the outer side of the drill bit, and the spray head is connected with a liquid spraying mechanism and sprays cooling liquid. The cooling device is used for cooling a drill bit during drilling; the supporting check ring is located below the spray head, and the supporting check ring is located on the outer side of the drill bit in a sleeving mode; the annular sleeve shell is arranged on the outer side of the supporting check ring in a sleeving mode; according to the drilling device for nodular iron casting machining, the air inlet mechanism, the adjusting mechanism and the airflow blowing mechanism are arranged on the annular sleeve shell, so that after the nodular iron casting is machined, chippings on the nodular iron casting can be blown away, an air gun does not need to be manually used for blowing away the chippings, and therefore manpower is effectively saved; meanwhile, the machining efficiency of the nodular iron casting is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of ductile iron casting processing, in particular to a drilling device for ductile iron casting processing. Background Art

[0002] Ductile iron is a high-strength cast iron material developed in the 1950s. Its comprehensive properties are close to those of steel. Based on its excellent properties, it has been successfully used to cast some parts with complex forces and high requirements for strength, toughness and wear resistance. Ductile iron has rapidly developed into a widely used cast iron material second only to gray cast iron. The so-called "iron instead of steel" mainly refers to ductile iron.

[0003] The mechanical properties of ductile iron are better than those of gray cast iron and similar to those of steel. It can be used to replace cast steel and forged steel to manufacture various parts with large loads, complex forces and wear resistance.

[0004] At present, when the existing ductile iron parts are processed, it is necessary to process and punch holes in the ductile iron parts. However, during the drilling process, the ductile iron parts are manually placed on the fixture, and then the drill bit drills the ductile iron parts. During the drilling process, the ductile iron parts generate a lot of debris. Therefore, after the drilling is completed, the staff holds an air gun to remove the debris on the outside of the ductile iron parts, and then takes the ductile iron parts with holes. Before taking them, the staff needs to use an air gun to remove the chips on the surface of the ductile iron parts with holes, which increases the workload of the staff. Summary of the invention

[0005] The object of the present invention is to provide a drilling device for machining ductile iron parts to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above object, the present invention provides the following technical solution: a drilling device for processing ductile iron parts, comprising a workbench for processing ductile iron, a drill bit arranged above the workbench, and a nozzle arranged outside the drill bit, wherein the nozzle is connected to a liquid spraying mechanism and sprays a cooling liquid to cool the drill bit when drilling; A support retaining ring, the support retaining ring is located below the nozzle and is sleeved on the outside of the drill bit; An annular casing, the annular casing is sleeved on the outside of the supporting retaining ring, the top of the annular casing is fixedly connected to the top of the supporting retaining ring, a hollow cavity is formed between the annular casing and the supporting retaining ring, and the annular casing is fixedly connected to the workbench through a fixing frame provided on the outside of the annular casing; An air intake mechanism, wherein the air intake mechanism is installed on a workbench, and an output end of the air intake mechanism is connected to the annular casing; An adjusting mechanism, wherein the adjusting mechanism is located at the hollow cavity, a plurality of vent holes are provided at equal distances on the support retaining ring, the adjusting mechanism is used to adjust the closure of the plurality of vent holes, and an annular opening communicating with the hollow cavity is provided at the bottom of the annular casing; An airflow blowing mechanism is installed at the bottom of the annular casing and located outside the annular opening. The airflow blowing mechanism is used to blow away the debris on the surface of the ductile iron casting after drilling.

[0007] Among them, the air intake mechanism includes a fixed plate installed on the outside of the workbench, a fan is installed on the fixed plate, the output end of the fan is connected to a ventilation pipe, and one end of the ventilation pipe is connected to the hollow cavity inside the annular shell, and the outer wall of the ventilation pipe is fixedly connected to the annular shell.

[0008] Wherein, the support retaining ring is provided with multiple rows of vent holes, and each row is provided with multiple vent holes.

[0009] Wherein, the adjustment mechanism comprises a support plate located outside each row of a plurality of vent holes, and a plurality of sealing members for sealing the vent holes are provided on the support plate; The bottoms of the plurality of support plates are all fixedly connected with positioning plates, and the plurality of positioning plates are mutually fixedly connected with internal threaded sleeves, and the internal threaded sleeves are rotatably connected to the inner wall of the annular casing through a sealing bearing; The annular casing is provided with a rotating member for driving the internal threaded sleeve; The internal threaded sleeve is connected with a closing mechanism, which is used to close the annular opening, and the opening and closing of the plurality of vents can be controlled by an adjusting mechanism.

[0010] Among them, the sealing member includes an electromagnet fixedly mounted on a support plate, a sliding rod slidingly penetrates the electromagnet, a sealing block is fixedly connected to one end of the sliding rod close to the support retaining ring, the sealing block is cooperatively connected at the vent, a connecting spring is installed on one side of the sealing block, the connecting spring is sleeved on the outside of the sliding rod, and the connecting spring is fixedly connected to the electromagnet, the sealing block is made of metal iron material, and the vent is sealed by the provided sealing member.

[0011] Wherein, the annular casing is provided with a moving opening at a position corresponding to the rotating member, and the rotating member comprises a sealing shell installed on the outside of the annular casing, and the sealing shell is located outside the moving opening; A rotating motor is fixedly installed inside the sealing shell, and a rotating gear is fixedly connected to the output end of the rotating motor. A plurality of gear grooves meshing with the rotating gear are provided on the outer side of the internally threaded sleeve. The rotating gear passes through the moving port, and the rotating gear is meshed and connected with the gear groove at the internally threaded sleeve. The internally threaded sleeve is driven by a rotating member.

[0012] Wherein, the closing mechanism comprises an external threaded sleeve threadedly connected to the internal threaded sleeve, the inner side of the annular casing is provided with two slide grooves communicating with the hollow cavity, the two slide grooves are slidably connected to limit plates, and the two limit plates are fixedly connected to the external threaded sleeve; A sealing ring is fixedly connected to the bottom of the external threaded sleeve, and the sealing ring is located and connected to the annular opening. Through the provided closing mechanism, the annular opening can be opened and closed.

[0013] Wherein, the airflow blowing mechanism comprises a first conical shell and a second conical shell fixedly mounted at the bottom of the annular shell, the first conical shell is located outside the second conical shell, the first conical shell and the second conical shell are located at the annular opening, and a guide channel is formed between the first conical shell and the second conical shell; The first conical shell is provided with a first guide section and a second guide section from top to bottom, and the second conical shell is provided with an air intake section and a closing section from top to bottom; A guide port is provided on the first conical shell and located at the first guide section, and two air outlet covers are installed outside the guide port, and an air outlet channel is formed between the two air outlet covers; A limiting member is installed inside the first conical shell and outside the guide port, and through the provided airflow blowing mechanism, the surface debris of the ductile iron casting can be blown away after the holes are punched.

[0014] Among them, the limiting member includes an annular sealing plate located at the guide channel and outside the guide port, a plurality of buffer springs are equidistantly connected to the bottom of the annular sealing plate, a plurality of buffer springs are fixedly connected to each other at the bottom with a fixing ring, and the fixing ring is fixedly connected to the inner wall of the first conical shell, and the limiting member is provided to achieve the function of closing the guide port.

[0015] Among them, a protective sleeve is installed on the side of the annular sealing plate close to the guide channel, and the bottom of the protective sleeve is fixedly connected to the fixing ring. Through the protective sleeve, the multiple buffer springs at the annular sealing plate are protected.

[0016] The present invention has at least the following beneficial effects: 1. When the present invention is in use, an annular casing is provided on a workbench, a supporting retaining ring with a plurality of vents is installed on the inner side of the annular casing, and an air intake mechanism and an adjusting mechanism are provided between the supporting retaining ring and the annular casing, so that when the drill bit punches holes in a ductile iron part with relatively high hardness, the temperature of the coolant can be reduced, so that the coolant can fully cool and dissipate the heat of the drill bit, further reduce the cutting temperature of the drill bit, ensure the cutting force of the drill bit, and further ensure the accuracy of punching holes in the ductile iron part with relatively high hardness and strength.

[0017] 2. When the present invention is in use, the air intake mechanism, the regulating mechanism and the airflow blowing mechanism are arranged on the annular casing, so that the debris on the ductile iron parts can be blown away after the ductile iron parts are processed. There is no need to manually use an air gun to blow away the debris, thereby effectively saving manpower and ensuring the processing efficiency of the ductile iron parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a front view of the overall structure of the present invention; Figure 2 It is a side view of the overall structure of the present invention; Figure 3 It is a rear view of the overall structure of the present invention; Figure 4 It is a schematic diagram of the structure of the air intake mechanism of the present invention; Figure 5 This is a schematic diagram of the internal structure of the annular casing of the present invention; Figure 6 It is a front view of the internal structure of the annular casing of the present invention; Figure 7 This is a schematic diagram of the sealing ring structure of the present invention; Figure 8 For the present invention Figure 7 A schematic diagram of the enlarged structure of the middle A area; Fig. 9 This is a schematic diagram of the support plate structure of the present invention; Fig.10 This is a schematic diagram of the supporting retaining ring structure of the present invention; Fig.11 It is a schematic diagram of the structure of the internal thread sleeve of the present invention; Fig.12 For the present invention Fig.11 Schematic diagram of the enlarged structure of area B in the middle.

[0019] In the figure: 1-working table; 2-drill bit; 21-sprinkler; 3-support retaining ring; 31-vent; 4-annular casing; 41-annular opening; 42-moving opening; 43-sliding groove; 5-hollow cavity; 6-air intake mechanism; 61-fixed plate; 62-fan; 63-ventilation pipe; 7-adjusting mechanism; 71-support plate; 72-seal; 721-electromagnet; 722-sliding rod; 723-seal block; 724-connecting spring; 73-positioning plate; 74-internal thread sleeve; 741-gear groove; 75-rotating member; 751-seal shell; 752-rotating motor; 7 53-rotating gear; 76-closing mechanism; 761-externally threaded sleeve; 762-sealing ring; 763-limiting plate; 8-airflow blowing mechanism; 81-first conical shell; 811-flow guide port; 82-second conical shell; 83-flow guide channel; 84-air outlet hood; 841-air outlet channel; 85-limiting member; 851-annular sealing plate; 852-buffer spring; 853-fixing ring; 86-protective sleeve; 9-collection port; 91-collection shell; 92-push plate; 93-electric push rod; 94-moving block; 95-bidirectional threaded screw; 96-driving motor. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Embodiment 1

[0021] See also Figure 1 and Figure 3-12 A drilling device for processing ductile iron parts, comprising a workbench 1 for processing ductile iron, a drill bit 2 arranged above the workbench 1, and a nozzle 21 arranged outside the drill bit 2, wherein the nozzle 21 is connected to a liquid spraying mechanism and sprays a coolant to cool the drill bit 2 when drilling a hole, and the liquid spraying mechanism and the nozzle 21 are both existing mechanisms, and can cooperate with the drill bit 2 to spray the coolant when the drill bit 2 is drilling a hole in the ductile iron part, and no further elaboration is made for this: A support retaining ring 3, wherein the support retaining ring 3 is located below the nozzle 21, and the support retaining ring 3 is sleeved on the outside of the drill bit 2; An annular casing 4, wherein the annular casing 4 is sleeved on the outside of the support retaining ring 3, the top of the annular casing 4 is fixedly connected to the top of the support retaining ring 3, a hollow cavity 5 is formed between the annular casing 4 and the support retaining ring 3, and the annular casing 4 is fixedly connected to the workbench 1 through a fixing frame provided on the outside thereof, and the arrangement of the support retaining ring 3 and the annular casing 4 does not affect the downward movement of the drill bit 2 to drill holes in the ductile iron casting; An air intake mechanism 6, wherein the air intake mechanism 6 is installed on the workbench 1, and an output end of the air intake mechanism 6 is connected to the annular casing 4; The air intake mechanism 6 includes a fixed plate 61 installed on the outside of the workbench 1, and a fan 62 is installed on the fixed plate 61. The output end of the fan 62 is connected to a ventilation pipe 63, and one end of the ventilation pipe 63 is communicated with the hollow cavity 5 inside the annular shell 4. The outer wall of the ventilation pipe 63 is fixedly connected to the annular shell 4, so that the airflow can be introduced into the hollow cavity 5 formed between the support retaining ring 3 and the annular shell 4 through the operation of the fan 62 through the ventilation pipe 63.

[0022] The adjusting mechanism 7 is located at the hollow cavity 5. The supporting retaining ring 3 is provided with a plurality of vent holes 31 at equal distances. The supporting retaining ring 3 is provided with a plurality of rows of vent holes 31, and each row of vent holes 31 is provided with a plurality of vent holes. The adjusting mechanism 7 is used to adjust the closure of the plurality of vent holes 31, and the bottom of the annular casing 4 is provided with an annular opening 41 communicating with the hollow cavity 5; The adjusting mechanism 7 comprises a supporting plate 71 located at the outside of each row of multiple vent holes 31, and the supporting plate 71 is provided with multiple sealing members 72 for sealing the vent holes 31, and the sealing members 72 comprise an electromagnet 721 fixedly mounted on the supporting plate 71, and a sliding rod 722 is slidably penetrated through the electromagnet 721, and a sealing block 723 is fixedly connected to one end of the sliding rod 722 close to the supporting retaining ring 3, and the sealing block 723 is cooperatively connected to the vent hole 31, and a connecting spring 724 is installed on one side of the sealing block 723, and the connecting spring 724 is sleeved on the outside of the sliding rod 722, and the connecting spring 724 is fixedly connected to the electromagnet 721, and the sealing block 723 is made of metal iron material, and the end of the sliding rod 722 away from the sealing block 723 is fixedly connected to a limiting block, so that the limiting block is provided to achieve the function of limiting the sliding rod 722; Specific implementation process: when the drill bit 2 drills the ductile iron casting on the workbench 1, the multiple vents 31 at the support retaining ring 3 are in an open state, that is, the sealing block 723 deviates from the vents 31. At the same time, the nozzle 21 sprays coolant to the drill bit 2 to cool the drill bit 2 during the drilling process. At the same time, the fan 62 runs to introduce the airflow into the hollow cavity 5 through the ventilation pipe 63. At this time, the annular opening 41 at the bottom of the annular shell 4 is in a closed state, and the airflow overflows through the multiple through holes on the support retaining ring 3, and the overflowing airflow cools the coolant, thereby reducing the cooling temperature of the coolant, and further achieving the effect of fully cooling the drill bit 2 during the drilling process.

[0023] The bottoms of the plurality of support plates 71 are all fixedly connected with positioning plates 73, and the plurality of positioning plates 73 are mutually fixedly connected with internal thread sleeves 74, and the internal thread sleeves 74 are rotatably connected to the inner wall of the annular casing 4 through a sealing bearing; The annular casing 4 is provided with a rotating member 75 for driving the internal threaded sleeve 74. The annular casing 4 is provided with a moving opening 42 at a position corresponding to the rotating member 75. The rotating member 75 includes a sealing shell 751 installed on the outside of the annular casing 4. The sealing shell 751 is located outside the moving opening 42. A rotating motor 752 is fixedly installed inside the sealing shell 751, and a rotating gear 753 is fixedly connected to the output end of the rotating motor 752. A plurality of gear grooves 741 meshing with the rotating gear 753 are provided on the outer side of the internal threaded sleeve 74. The rotating gear 753 passes through the moving port 42, and the rotating gear 753 is meshed and connected with the gear groove 741 of the internal threaded sleeve 74. The inner threaded sleeve 74 is internally connected with a closing mechanism 76 , and the closing mechanism 76 is used to close the annular opening 41 .

[0024] The closing mechanism 76 comprises an external threaded sleeve 761 threadedly connected to the internal threaded sleeve 74, and the inner side of the annular casing 4 is provided with two slide grooves 43 communicating with the hollow cavity 5, and the two slide grooves 43 are slidably connected to the limiting plates 763, and the two limiting plates 763 are fixedly connected to the external threaded sleeve 761; A sealing ring 762 is fixedly connected to the bottom of the external threaded sleeve 761 , and the sealing ring 762 is located at the annular opening 41 .

[0025] Specific implementation process: When the drill bit 2 completes drilling the ductile iron casting on the workbench 1, the rotary motor 752 is operated, so that the rotating gear 753 rotates. While the rotating gear 753 rotates, it meshes with the gear groove 741 on the internal threaded sleeve 74, further driving the internal threaded sleeve 74 to rotate relative to the annular sleeve 4. When the internal threaded sleeve 74 rotates, on the one hand, the multiple positioning plates 73 on it drive the support plate 71 on it to rotate, and until the multiple sealing blocks 723 on the support plate 71 rotate To the position of the vent hole 31, at this time, due to the reverse elastic force of the connecting spring 724 on the multiple sealing blocks 723, the further sealing blocks 723 are clamped at the vent hole 31 to close the vent hole 31, and when the vent hole 31 is opened, the electromagnets 721 located on the multiple support plates 71 are energized, and at this time, the sealing blocks 723 move along the direction of the electromagnets 721 until they are about to leave the vent hole 31, and the rotary motor 752 rotates in the reverse direction, thereby making the sealing blocks 723 leave the vent hole 31; The airflow blowing mechanism 8 is installed at the bottom of the annular casing 4 and located at the annular opening 41. The airflow blowing mechanism 8 is used to blow away the debris on the surface of the ductile iron casting after drilling.

[0026] The airflow blowing mechanism 8 comprises a first conical shell 81 and a second conical shell 82 fixedly mounted at the bottom of the annular housing 4, wherein the first conical shell 81 is located outside the second conical shell 82, the first conical shell 81 and the second conical shell 82 are located outside the annular opening 41, and a guide channel 83 is formed between the first conical shell 81 and the second conical shell 82; The first conical shell 81 is provided with a first guide section and a second guide section from top to bottom, and the second conical shell 82 is provided with an air intake section and a closing section from top to bottom, and the cavity formed between the upper section of the air intake section and the first guide section is larger than the diameter of the sealing ring 762, so that when the sealing ring 762 enters the upper section of the air intake section, the airflow enters the guide channel 83; A guide port 811 is provided on the first conical shell 81 and located at the first guide section, and two air outlet covers 84 are installed outside the guide port 811, and an air outlet channel 841 is formed between the two air outlet covers 84; A limiting member 85 is installed on the inner side of the first conical shell 81 and on the outer side of the guide port 811. The limiting member 85 includes an annular sealing plate 851 located at the guide channel 83 and on the outer side of the guide port 811. A plurality of buffer springs 852 are equidistantly connected to the bottom of the annular sealing plate 851. A fixing ring 853 is fixedly connected to each other at the bottom of the plurality of buffer springs 852. The fixing ring 853 is fixedly connected to the inner wall of the first conical shell 81. A protective sleeve 86 is installed on the side of the annular sealing plate 851 close to the guide channel 83. The bottom of the protective sleeve 86 is fixedly connected to the fixing ring 853.

[0027] Specific implementation process: When the rotary motor 752 rotates, on the one hand, the internal threaded sleeve 74 is rotated, and the internal threaded sleeve 74 drives the multiple positioning plates 73 thereon to rotate synchronously. On the other hand, the internal threaded sleeve 74 provides a driving force for the external threaded sleeve 761 inside it. Because the external threaded sleeve 761 is limited by the slide groove 43 and the limiting plate 763, the external threaded sleeve 761 moves downward relative to the annular sleeve 4. When the external threaded sleeve 761 moves downward, it synchronously drives the sealing ring 762 thereon to deviate from the annular opening 41. At this time, the sealing block 723 is close to At the vent hole 31, under the limit of the support plate 71, the vent hole 31 is partially blocked. At this time, a part of the air flow flows out from the vent hole 31. At this time, since the ductile iron part has been punched, the nozzle 21 is in a closed state, and the air flow flows out through the inner ring of the annular shell 4 to blow away the debris on the surface of the ductile iron part that has been punched. The other part of the air flow flows out through the guide channel 83 formed between the first conical shell 81 and the second conical shell 82, and the guide channel 83 is set in a cone shape, so as to fully blow away the debris on the surface of the ductile iron part; And by the continuous operation of the rotating motor 752, multiple sealing blocks 723 are respectively sealed and clamped in the vent holes 31 of the support retaining ring 3. At this time, the sealing ring 762 presses down the annular sealing plate 851 to separate the annular sealing plate 851 from the guide port 811. At this time, the sealing ring 762 and the guide channel 83 remain sealed, and the guide port 811 is opened. At this time, all the airflow overflows through the air outlet channel 841, thereby achieving the effect of blowing away the debris at the fixture on the workbench 1, thereby ensuring that the debris on and around the ductile iron parts are blown away after the drilling process. Embodiment 2

[0028] See also Figure 2 , Embodiment 2 is a further supplementary explanation of Embodiment 1, specifically: both sides of the workbench 1 are provided with collection ports 9, and collection shells 91 for collecting debris are provided below the two collection ports 9, two push plates 92 are provided on the outside of the fixture, electric push rods 93 are installed on the push plates 92, and a moving block 94 is installed on the outside of the top of the electric push rod 93, a bidirectional threaded screw 95 is rotatably connected to the workbench 1, two moving blocks 94 are slidably connected to one side of the workbench 1, and the two moving blocks 94 are threadedly sleeved on the outside of the bidirectional threaded screw 95, and a driving motor 96 for driving the bidirectional threaded screw 95 is installed on the workbench 1; The bidirectional threaded screw 95 is thereby rotated by driving the motor 96, while the bidirectional threaded screw 95 rotates, it provides driving forces in opposite directions to the two moving blocks 94, thereby causing the two push plates 92 to move in opposite directions. The push plates 92 can push the debris at the fixture on the workbench 1 to the collection port 9, and collect it through the collection shell 91. When the pushing is completed, the drive motor 96 runs in the reverse direction, and the electric push rod 93 retracts, thereby causing the push plate 92 to move upward relative to the inside of the workbench 1 until the push plate 92 moves to the fixture, and the electric push rod 93 returns to its original position.

[0029] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0030] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A drilling device for machining ductile iron parts, comprising a workbench (1) for machining ductile iron, a drill bit (2) arranged above the workbench (1), and a nozzle (21) arranged outside the drill bit (2), wherein the nozzle (21) is connected to a liquid spraying mechanism and sprays a cooling liquid for cooling the drill bit (2) during drilling, characterized in that: A support retaining ring (3), wherein the support retaining ring (3) is located below the nozzle (21), and the support retaining ring (3) is sleeved on the outside of the drill bit (2); an annular sleeve (4), the annular sleeve (4) being sleeved on the outside of the supporting retaining ring (3), the top of the annular sleeve (4) being fixedly connected to the top of the supporting retaining ring (3), a hollow cavity (5) being formed between the annular sleeve (4) and the supporting retaining ring (3), the annular sleeve (4) being fixedly connected to the workbench (1) via a fixing frame provided on the outside of the annular sleeve (4); An air intake mechanism (6), wherein the air intake mechanism (6) is mounted on the workbench (1), and an output end of the air intake mechanism (6) is in communication with the annular casing (4); An adjusting mechanism (7), the adjusting mechanism (7) being located at the hollow cavity (5), the supporting retaining ring (3) being provided with a plurality of vent holes (31) at equal distances, the adjusting mechanism (7) being used to adjust the closure of the plurality of vent holes (31), and the bottom of the annular casing (4) being provided with an annular opening (41) communicating with the hollow cavity (5); An airflow blowing mechanism (8) is installed at the bottom of the annular casing (4) and is located at the annular opening (41). The airflow blowing mechanism (8) is used to blow away debris on the surface of the ductile iron casting after drilling.

2. A drilling device for machining ductile iron parts according to claim 1, characterized in that: The air intake mechanism (6) comprises a fixed plate (61) mounted on the outside of the workbench (1), a fan (62) being mounted on the fixed plate (61), an output end of the fan (62) being connected to a ventilation pipe (63), one end of the ventilation pipe (63) being in communication with a hollow cavity (5) inside the annular casing (4), and an outer wall of the ventilation pipe (63) being fixedly connected to the annular casing (4).

3. A drilling device for machining ductile iron parts according to claim 1, characterized in that: The support retaining ring (3) is provided with a plurality of rows of vent holes (31), and each row of vent holes (31) is provided with a plurality of vent holes.

4. A drilling device for machining ductile iron parts according to claim 1, characterized in that: The regulating mechanism (7) comprises a support plate (71) located outside each row of the plurality of vent holes (31), and the support plate (71) is provided with a plurality of sealing members (72) for sealing the vent holes (31); The bottoms of the plurality of support plates (71) are all fixedly connected to positioning plates (73), the plurality of positioning plates (73) are mutually fixedly connected to internally threaded sleeves (74), and the internally threaded sleeves (74) are rotatably connected to the inner wall of the annular casing (4) via a sealing bearing; A rotating member (75) for driving the internally threaded sleeve (74) is mounted on the annular casing (4); The internal threaded sleeve (74) is internally connected to a closing mechanism (76), and the closing mechanism (76) is used to close the annular opening (41).

5. A drilling device for machining ductile iron parts according to claim 4, characterized in that: The sealing member (72) comprises an electromagnet (721) fixedly mounted on a support plate (71); a slide rod (722) slidably penetrates the electromagnet (721); a sealing block (723) is fixedly connected to one end of the slide rod (722) close to the support retaining ring (3); the sealing block (723) is cooperatively connected to the vent hole (31); a connecting spring (724) is installed on one side of the sealing block (723); the connecting spring (724) is sleeved on the outside of the slide rod (722), and the connecting spring (724) is fixedly connected to the electromagnet (721); and the sealing block (723) is made of metal iron material.

6. A drilling device for machining ductile iron parts according to claim 4, characterized in that: The annular casing (4) is provided with a moving opening (42) at a position corresponding to the rotating member (75); the rotating member (75) comprises a sealing shell (751) mounted on the outside of the annular casing (4); the sealing shell (751) is located outside the moving opening (42); A rotating motor (752) is fixedly installed inside the sealing shell (751), and a rotating gear (753) is fixedly connected to the output end of the rotating motor (752). A plurality of gear grooves (741) meshing with the rotating gear (753) are provided on the outside of the internally threaded sleeve (74). The rotating gear (753) passes through the moving opening (42), and the rotating gear (753) is meshingly connected with the gear groove (741) on the internally threaded sleeve (74).

7. A drilling device for machining ductile iron parts according to claim 4, characterized in that: The closing mechanism (76) comprises an external threaded sleeve (761) threadedly connected to the internal threaded sleeve (74); the inner side of the annular casing (4) is provided with two slide grooves (43) communicating with the hollow cavity (5); the two slide grooves (43) are slidably connected to limit plates (763); the two limit plates (763) are fixedly connected to the external threaded sleeve (761); A sealing ring (762) is fixedly connected to the bottom of the externally threaded sleeve (761), and the sealing ring (762) is located at a position where it is fitted and connected to the annular opening (41).

8. The drilling device for machining ductile iron parts according to claim 1, characterized in that: The airflow blowing mechanism (8) comprises a first conical shell (81) and a second conical shell (82) fixedly mounted on the bottom of the annular casing (4); the first conical shell (81) is located outside the second conical shell (82); the first conical shell (81) and the second conical shell (82) are located outside the annular opening (41); and a guide channel (83) is formed between the first conical shell (81) and the second conical shell (82); The first conical shell (81) is provided with a first guide section and a second guide section from top to bottom, and the second conical shell (82) is provided with an air intake section and a closing section from top to bottom; A flow guide port (811) is provided on the first conical shell (81) and located at the first flow guide section, and two air outlet covers (84) are installed outside the flow guide port (811), and an air outlet channel (841) is formed between the two air outlet covers (84); A limiting member (85) is installed inside the first conical shell (81) and outside the guide port (811).

9. A drilling device for machining ductile iron parts according to claim 8, characterized in that: The limiting member (85) comprises an annular sealing plate (851) located at the guide channel (83) and outside the guide port (811); a plurality of buffer springs (852) are equidistantly connected to the bottom of the annular sealing plate (851); a fixing ring (853) is fixedly connected to the bottom of the plurality of buffer springs (852); and the fixing ring (853) is fixedly connected to the inner wall of the first conical shell (81).

10. A drilling device for machining ductile iron parts according to claim 9, characterized in that: A protective sleeve (86) is installed on one side of the annular sealing plate (851) close to the flow guide channel (83), and the bottom of the protective sleeve (86) is fixedly connected to the fixing ring (853).

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