A kind of opening device for injection mold manufacturing

Abstract

The application belongs to the technical field of mold processing, and particularly relates to a hole opening device for manufacturing an injection mold, which comprises a machine table, a numerical control drilling machine fixedly assembled on the machine table, and a drill bit installed on a drilling machine main shaft of the numerical control drilling machine; further comprises a guide frame fixedly installed on the top of the machine table, wherein the guide frame is a circular arc frame body; an arc-shaped guide rail fixedly arranged on the inner wall of the guide frame, wherein a sliding table is slidingly assembled on the arc-shaped guide rail; and a workpiece clamp installed on the sliding table, wherein the workpiece clamp is used for clamping a mold workpiece. The sliding table drives the workpiece clamp to move along the arc-shaped guide rail to the upper part of the guide frame in an inclined state, at the same time, a servo motor in a flushing mechanism drives a connecting rod and a sleeve rod in linkage, drives a flushing pipe to reciprocatingly slide in a sliding groove and swing to flush, improves the cleaning efficiency of drilling, and avoids that residual debris affects the subsequent processing quality.

Description

Technical Field

[0001] This invention belongs to the field of mold processing technology, and more specifically, relates to an opening device for injection mold manufacturing. Background Technology

[0002] Molds, as crucial process equipment used in industrial production for shaping products, play an indispensable role in modern manufacturing. Through cavities or cores of specific shapes, materials such as metals, plastics, and rubber can undergo plastic deformation or solidification under pressure and temperature, thereby obtaining parts of the desired shape and size. In the injection mold manufacturing process, drilling machines are key equipment used to process cylindrical holes in the mold material. Depending on the specific needs and mold conditions, different types of equipment, such as vertical drilling machines, bench drilling machines, radial drilling machines, and deep hole drilling machines, can be selected for the operation.

[0003] However, existing drilling methods and technologies have some significant drawbacks in practical operation. First, during the drilling process, the fine iron filings generated by the drill bit cutting the workpiece through rotation and axial feed tend to accumulate at the drill rod and the drill hole, especially in deep hole drilling and coolant spraying. This accumulation not only affects the normal flow of coolant, leading to heat accumulation and potentially causing thermal deformation of the workpiece, but also increases the wear of the drill bit. Second, when the drill bit first contacts the workpiece to make a hole, the smooth surface of the workpiece and the high-speed rotation of the drill bit often cause the drill bit to slip, which can lead to problems such as drilling position deviation and accelerated drill bit wear. Therefore, we propose a hole-making device for injection mold manufacturing to overcome the above-mentioned drawbacks. Summary of the Invention

[0004] In order to overcome the shortcomings of the prior art, the present invention provides an opening device for injection mold manufacturing.

[0005] The technical solution is as follows: A hole-opening device for injection mold manufacturing, comprising a machine table and a CNC drilling machine. The machine table is the load-bearing base of the hole-opening device. The CNC drilling machine is fixedly mounted on the machine table and is used to perform hole-opening processing on the mold workpiece. A drill bit is mounted on the spindle of the CNC drilling machine. The device also includes: a guide frame, fixedly mounted on the top of the machine table, the guide frame being an arc-shaped frame with an open lower part; an arc-shaped guide rail, fixedly disposed on both sides of the inner wall of the guide frame, with a slide table slidably mounted on the arc-shaped guide rail; a workpiece clamp, mounted on the slide table, the workpiece clamp being a customized clamp used to hold the mold workpiece to be hole-opened, and a drive mechanism for driving the slide table is provided inside the guide frame; the guide... The upper frame is equipped with a flushing mechanism for rinsing the drilled hole; the CNC drilling machine is equipped with a cleaning mechanism near the drill spindle, which is used to clean the drill bit. The cleaning mechanism includes: a fixing block, which is fixedly connected to the housing of the CNC drilling machine near the drill spindle; a mounting bracket, which is fixedly installed on the drill spindle; two cleaning brushes, which are symmetrically connected to the lower two sides of the mounting bracket via a rotating shaft, and a torsion spring is provided between the mounting bracket and the rotating shaft. The cleaning brushes are used to clean the drill bit after drilling; a pull rope, which passes through and is slidably connected to the mounting bracket, with both ends of the pull rope fixedly connected to the rotating shafts on both sides, and the pull rope is vertically aligned with the fixing block; and a spray pipe, which is installed in the mounting bracket and is used to spray cutting fluid for cooling and cleaning onto the drill bit.

[0006] As a further preferred embodiment, the drive mechanism includes an arc-shaped rack, a bidirectional motor, and gears. The bottom of the arc-shaped guide rail is fixedly provided with an arc-shaped rack, and the bidirectional motor is fixedly installed inside the slide. Gears are fixedly connected to the bidirectional output shafts of the bidirectional motor, and the gears mesh with the corresponding racks on the same side.

[0007] As a further preferred embodiment, the rinsing mechanism includes a rinsing pipe rotatably connected to the upper inner wall of the guide frame. The rinsing pipe has nozzles for rinsing the mold workpiece. The upper part of the guide frame is an inclined frame with symmetrically arranged grooves on its side walls. Both ends of the rinsing pipe extend into the grooves of the guide frame. A servo motor is fixedly installed on the upper outer wall of the guide frame. Both ends of the rinsing pipe are fixedly connected to connecting rods. Sleeve rods are rotatably connected to the outer walls of both sides of the guide frame near the connecting rods. The sleeve rods and the connecting rods on the same side are slidably engaged. The output shaft of the servo motor is connected to the rotation shaft of the connecting rod on the same side. A baffle is slidably connected to the inner wall of the guide frame corresponding to the groove. The baffle and the rinsing pipe are rotatably engaged.

[0008] As a further preferred embodiment, the machine tool is equipped with a conveying mechanism for conveying cutting fluid. The conveying mechanism includes a storage tank fixedly installed inside the machine tool, which stores cutting fluid for drilling. The storage tank is located below the guide frame, and the platform of the machine tool corresponding to the storage tank is open. Two liquid pumps are installed on the storage tank. The inlet of the liquid pump is connected to the bottom of the storage tank through a pipe. The outlet of one of the liquid pumps is connected to a flushing pipe through a first conveying pipe, and the outlet of the other liquid pump is connected to a spray pipe through a second conveying pipe.

[0009] As a further preferred embodiment, the drill spindle is provided with a switching mechanism for convenient drill bit switching. The switching mechanism includes a mounting block fixedly connected to the drill spindle, a guide rail frame rotatably connected to the mounting block, and multiple storage frames fixedly mounted on the guide rail frame. The storage frames are arranged in an arc shape along the guide rail on the guide rail frame. An assembly block is rotatably connected to one side of each storage frame. The assembly block is square and has a through slot for placing drill bits inside. Each slot of the assembly block holds a spare drill bit of a different model adapted to the drill spindle. One end of the storage frame is provided with a limiting member for limiting the assembly block.

[0010] As a further preferred embodiment, the limiting component includes a limiting plate, a guide rod, and a spring. The storage frame is provided with a limiting plate at one end near the assembly block. The limiting plate is slidably connected to the storage frame via the guide rod. The guide rod and the assembly block are hinged to each other. A spring is provided between the storage frame and the guide rod.

[0011] As a further preferred embodiment, a locking rod is slidably connected to the connection end between the mounting block and the guide rail frame. The locking rod is slidably embedded in the mounting block. A spring is provided between the mounting block and the locking rod. The rod end of the locking rod is an arc end face. Multiple slots for matching the locking rod are spaced apart on the guide rail frame. The slots on the guide rail frame correspond to the positions of the storage frame.

[0012] As a further preferred embodiment, a first filter screen and a second filter screen are installed on the upper part of the inner wall of the liquid storage tank. The pore size of the first filter screen is larger than that of the second filter screen. The first filter screen and the second filter screen are used to filter the cutting fluid that flows back into the liquid storage tank. The first filter screen and the second filter screen are used to filter the cutting fluid that flows back into the liquid storage tank in stages.

[0013] The present invention has the following advantages:

[0014] 1. The present invention uses a slide table to move the workpiece fixture along the arc-shaped guide rail to the upper part of the guide frame in an inclined state. At the same time, the servo motor in the flushing mechanism drives the connecting rod and the sleeve rod to move the flushing pipe back and forth in the slide groove and swing to flush, thereby improving the cleaning efficiency of the drilled hole and avoiding residual debris from affecting the subsequent processing quality.

[0015] 2. This invention can achieve automated cleaning of the drill bit by setting up a cleaning mechanism and using the linkage mechanism of torsion spring and pull rope. When the drill bit rises and resets, it is pressed by the fixed block and closes, contacting and brushing the rotating drill bit. At the same time, the spray pipe intermittently sprays cutting fluid to further remove metal debris from the surface of the drill bit, thereby achieving automated cleaning of the drill bit, effectively preventing drill bit blockage and excessive wear, and significantly extending the service life of the drill bit.

[0016] 3. The present invention can also store different types of drill bits through a drill bit switching mechanism and multiple storage boxes on the guide rail frame. When it is necessary to change the drill bit, the operator only needs to rotate the guide rail frame to quickly find the required drill bit, and the alignment and installation can be achieved by rotating the assembly block, which shortens the drill bit change time and achieves stable storage and quick replacement of drill bits. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0018] Figure 2 This diagram shows the connection relationship between the guide frame, slide, workpiece fixture, and drive mechanism of the present invention.

[0019] Figure 3 This is a schematic diagram illustrating the relationship between the arc-shaped rack, bidirectional motor, and gears of the present invention.

[0020] Figure 4 This is a schematic diagram of the slide table moving to the tilted cleaning state within the guide frame of the present invention.

[0021] Figure 5 This is a schematic diagram of the flushing pipe, servo motor, connecting rod, sleeve rod, and baffle of the present invention.

[0022] Figure 6 This is a schematic diagram of the specific components of the CNC drilling machine, drilling spindle, and cleaning mechanism of the present invention.

[0023] Figure 7 This is a schematic diagram of the components of the present invention, including the fixing block, mounting bracket, cleaning brush, and pull rope.

[0024] Figure 8 This diagram shows the connection relationship between the mounting bracket, rotating shaft, cleaning brush, torsion spring, and spray pipe of the present invention.

[0025] Figure 9 This is a schematic diagram of specific components of the conveying mechanism of the present invention.

[0026] Figure 10 This is a schematic diagram of the CNC drilling machine, mounting block, guide rail frame, and storage frame of the present invention.

[0027] Figure 11 This is a schematic diagram of the specific components of the switching mechanism and limiting member of the present invention.

[0028] Figure 12 This is a schematic diagram showing the mating relationship between the mounting block, guide rail frame, and clamp rod of the present invention.

[0029] Figure 13 This is a three-dimensional structural diagram of the first and second filter screens inside the liquid storage tank of the present invention.

[0030] Among them: 100-Mold workpiece, 1-Machine base, 2-CNC drilling machine, 21-Drilling machine spindle, 22-Drill bit, 3-Guide frame, 31-Arc-shaped guide rail, 32-Slide groove, 4-Slide table, 5-Workpiece clamp, 6-Drive mechanism, 61-Arc-shaped rack, 62-Bidirectional motor, 63-Gear, 7-Flushing mechanism, 71-Flushing pipe, 72-Servo motor, 73-Connecting rod, 74-Sleeve rod, 75-Baffle, 8-Cleaning mechanism, 81-Fixing block, 82-Mounting bracket, 83-Rotating shaft, 84- Cleaning brush, 85-pull rope, 86-torsion spring, 9-spray pipe, 10-conveying mechanism, 101-liquid storage tank, 102-liquid pump, 103-conveying pipe one, 104-conveying pipe two, 11-switching mechanism, 111-mounting block, 112-guide rail frame, 113-storage frame, 114-assembly block, 12-limiting component, 121-limiting plate, 122-guide rod, 123-spring one, 13-clamping rod, 131-spring two, 132-slot, 14-first filter screen, 15-second filter screen. Detailed Implementation

[0031] The present invention will be further described below with reference to specific embodiments. It should also be noted that, unless otherwise explicitly specified and limited, terms such as "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention based on the specific circumstances.

[0032] A hole-opening device for injection mold manufacturing, see reference. Figures 1-8As shown, the device includes a machine base 1 and a CNC drilling machine 2. The machine base 1 serves as the load-bearing base for the drilling device. The CNC drilling machine 2 is fixedly mounted on the machine base 1 and is used to perform drilling operations on the mold workpiece 100. A drill bit 22 is mounted on the drill spindle 21 of the CNC drilling machine 2. The device also includes: a guide frame 3, fixedly mounted on the top of the machine base 1. The guide frame 3 is an arc-shaped frame with an open structure at the bottom. An arc-shaped guide rail 31 is fixedly set on both sides of the inner wall of the guide frame 3, and a slide table 4 is slidably mounted on the arc-shaped guide rail 31. A workpiece clamp 5 is mounted on the slide table 4. The workpiece clamp 5 is a customized clamp used to hold the mold workpiece 100 to be drilled. A drive mechanism 6 for driving the slide table 4 is provided inside the guide frame 3. The upper frame of the guide frame 3 is equipped with a flushing mechanism 7 for flushing the drilled holes. When the CNC drilling machine 2 drives the drill bit 22 to drill the mold workpiece 100 through the drill spindle 21, each drilling is performed in multiple rounds. In each round of drilling, the drill bit 22 is lowered to a preset drilling depth and reset by the drill spindle 21. Then, the drive unit drives the slide table 4, so that the workpiece fixture 5 and the mold workpiece 100 it holds move along the arc guide rail 31 to the upper part of the guide frame 3 in an inclined state. Then, the flushing mechanism 7 is used to flush the drilled holes of the mold workpiece 100. The inclined state of the mold workpiece 100 facilitates the flow of cutting fluid from the drilled holes after flushing. The CNC drilling machine 2 is equipped with a cleaning mechanism 8 near the drill spindle 21. The cleaning mechanism 8 is used to clean the drill bit 22. The cleaning mechanism 8 includes: a fixed block 81, fixedly connected to the housing of the CNC drilling machine 2 near the drill spindle 21; a mounting bracket 82, fixedly mounted on the drill spindle 21; two cleaning brushes 84, symmetrically connected to the lower sides of the mounting bracket 82 via rotating shafts 83, with a torsion spring 86 between the mounting bracket 82 and the rotating shafts 83; the cleaning brushes 84 are used to clean the drill bit 22 after drilling; a pull rope 85, passing through and slidably connected to the mounting bracket 82, with both ends of the pull rope 85 fixedly connected to the rotating shafts 83 on both sides, and the pull rope 85 vertically corresponding to the fixed block 81; and a spray pipe 9, installed inside the mounting bracket 82 and used to spray cooling and cleaning fluid onto the drill bit 22. When the drill bit 22 is driven down by the drill spindle 21 to drill, the cleaning brushes 84 on both sides are open upward under the action of the torsion spring 86. When the drill bit 22 is driven up by the drill spindle 21 to reset, the pull rope 85 on the mounting bracket 82 is pressed by the fixing block 81 and pulls the rotating shafts 83 on both sides to rotate, so that the rotating shafts 83 drive the cleaning brushes 84 to rotate inward and close and contact the drill bit 22. At this time, the bristles of the cleaning brushes 84 will clean the rotating drill bit 22. At the same time, the cutting fluid is sprayed intermittently by the spray pipe 9 to remove metal chips on the drill bit 22. Thus, the drilling of the mold workpiece 100 and the cleaning of the drill bit 22 are carried out in a separate manner to ensure the quality of the opening of the mold workpiece 100 in each round and reduce the wear of the drill bit 22.

[0033] See Figure 2 and Figure 3As shown, the drive mechanism 6 includes an arc-shaped rack 61, a bidirectional motor 62, and a gear 63. The bottom of the arc-shaped guide rail 31 is fixedly provided with an arc-shaped rack 61. The bidirectional motor 62 is fixedly installed inside the slide table 4. The bidirectional output shaft of the bidirectional motor 62 is fixedly connected with a gear 63. The gear 63 and the corresponding rack on the same side mesh with each other. The bidirectional motor 62 drives the gears 63 on both sides to mesh with the rack synchronously, thereby driving the slide table 4 in the guide frame 3 to move stably along the arc-shaped guide rail 31.

[0034] See Figures 2-5 As shown, the rinsing mechanism 7 includes a rinsing pipe 71 rotatably connected to the upper inner wall of the guide frame 3. The rinsing pipe 71 has nozzles for rinsing the mold workpiece 100. The upper part of the guide frame 3 is an inclined frame with symmetrically arranged grooves 32 on its side walls. Both ends of the rinsing pipe 71 extend into the grooves 32 of the guide frame 3. A servo motor 72 is fixedly installed on the upper outer wall of the guide frame 3. Both ends of the rinsing pipe 71 are fixedly connected to connecting rods 73. Sleeve rods 74 are rotatably connected to the outer walls of both sides of the guide frame 3 near the connecting rods 73. The sleeve rods 74 and the same side... The connecting rod 73 is slidably engaged, and the output shaft of the servo motor 72 is connected to the rotation shaft 83 of the connecting rod 73 on the same side. A baffle 75 is slidably connected to the inner wall of the guide frame 3 corresponding to the slide groove 32. The baffle 75 and the flushing pipe 71 are rotatably engaged. The servo motor 72 reciprocates to drive the connecting rod 73 to rotate. The rotating connecting rod 73 drives the sleeve 74, which is slidably engaged with it, to extend and retract, thereby driving the flushing pipe 71 to slide back and forth along the slide groove 32 on the guide frame 3, so that the flushing pipe 71 can always swing towards the mold workpiece 100 for rinsing during the movement.

[0035] When using a hole-opening device to open a hole in an injection mold, the mold workpiece 100 to be holed is first stably clamped by the workpiece clamp 5. Then, the CNC drilling machine 2 drives the drilling spindle 21 to drive the drill bit 22 to perform hole-opening on the mold workpiece 100 clamped by the workpiece clamp 5. A split-drilling strategy is adopted in the hole-opening process: in each round, the drill bit 22 is controlled by the drilling spindle 21 to descend to the preset drilling depth and then return to its original position. After the mold workpiece 100 and the drill bit 22 are cleaned after the first round of drilling, the next round of drilling is performed until a complete drilling cycle is completed. After a round of drilling is completed, the drive mechanism 6 is activated. At this time, the bidirectional motor 62 drives the gears 63 on both sides to mesh synchronously with the arc-shaped rack 61 on the same side, thereby pushing the slide 4 to slide stably along the arc-shaped guide rails 31 fixed on both sides of the inner wall of the guide frame 3. The movement of the slide 4 drives the workpiece clamp 5 and the clamped mold workpiece 100 to move as a whole, and finally transports and positions the mold workpiece 100 to the guide frame 3. In the upper region, the mold workpiece 100 is tilted due to the guidance of the arc-shaped guide rail 31. At this time, the flushing mechanism 7 built into the upper part of the guide frame 3 starts to work. The servo motor 72 drives the connecting rod 73 to rotate, which drives the sleeve rod 74 that slides with the connecting rod 73 to extend and retract. This forces the flushing pipe 71 to slide back and forth along the slide groove 32 on the upper part of the guide frame 3. During this sliding process, the nozzle on the flushing pipe 71 continuously sprays cutting fluid to oscillate and flush the hole just drilled on the tilted mold workpiece 100. During the flushing process, the baffle 75 will always block the slide groove 32 of the guide frame 3 to prevent the cutting fluid from splashing out of the slide groove 32 during the flushing process. At this time, the tilted state of the mold workpiece 100 can ensure that the flushed cutting fluid can carry the metal chips generated by drilling and flow smoothly out of the hole, effectively cleaning the hole wall and removing chips, thereby improving the quality of subsequent hole opening of the mold workpiece 100, while protecting the drill bit 22 and preventing the residual metal chips in the hole from accelerating the wear of the drill bit 22.

[0036] See Figure 1 and Figure 9 As shown, the machine tool 1 is equipped with a conveying mechanism 10 for conveying cutting fluid. The conveying mechanism 10 includes a storage tank 101 fixedly installed inside the machine tool 1. The storage tank 101 stores cutting fluid for drilling. The storage tank 101 is located below the guide frame 3. The table surface of the machine tool 1 corresponding to the storage tank 101 is open. Two liquid pumps 102 are installed on the storage tank 101. The inlet of the liquid pump 102 is connected to the bottom of the storage tank 101 through a pipe. The outlet of one liquid pump 102 is connected to the flushing pipe 71 through a first conveying pipe 103. The outlet of the other liquid pump 102 is connected to the spray pipe 9 through a second conveying pipe 104. The two liquid pumps 102 pump cutting fluid to the flushing pipe 71 and the spray pipe 9 respectively, thereby cooling and cleaning the mold workpiece 100 and the drill bit 22 during the drilling process.

[0037] See Figure 13As shown, a first filter screen 14 and a second filter screen 15 are installed on the upper part of the inner wall of the liquid storage tank 101. The pore size of the first filter screen 14 is larger than that of the second filter screen 15. The first filter screen 14 and the second filter screen 15 are used to filter the cutting fluid that flows back into the liquid storage tank 101. The first filter screen 14 and the second filter screen 15 are used to filter the cutting fluid that flows back into the liquid storage tank 101 in stages, and filter out the open metal chips mixed therein, so as to classify the chips.

[0038] During the process of drill bit 22 rising and resetting with the drill spindle 21, cleaning mechanism 8 is activated. When mounting bracket 82 rises with the spindle, the pull rope 85 passing through mounting bracket 82 contacts and is pressed downward by the fixing block 81 at the housing of CNC drill machine 2. The downward-moving pull rope 85 pulls the rotating shafts 83 on both sides of mounting bracket 82, causing the rotating shafts 83 to rotate against the force of torsion spring 86. The rotation of rotating shaft 83 drives the cleaning brush 84 on it to rotate inward and close from its original upward-open posture under the action of torsion spring 86, until the bristles of the cleaning brush 84 tightly contact and wrap around the still rotating drill bit 22. At the same time, the spray pipe 9 inside mounting bracket 82 intermittently sprays cutting fluid onto drill bit 22. Through the synergistic effect of the rotating drill bit 22, the closed cleaning brush 84, and the spraying of cutting fluid, metal debris and other contaminants adhering to the surface of drill bit 22 are efficiently removed. During the cleaning process, the sprayed cutting fluid carries the metal chips on the drill bit 22 and drips them downwards. At this time, since the slide table 4 and workpiece clamp 5 on the guide frame 3 have moved from the lower machining position to the upper cleaning position, the cutting fluid dripping from the drill bit 22 can flow smoothly back into the storage tank 101. The cutting fluid used by the flushing pipe 71 and the spray pipe 9 both come from the storage tank 101 inside the machine tool 1. They are pumped by the corresponding liquid pump 102 through the first delivery pipe 103 and the second delivery pipe 104, respectively. The used cutting fluid carrying the chips flows back into the storage tank 101 through the lower opening of the guide frame 3 or the opening of the machine tool 1. In the storage tank 101, the returning cutting fluid flows through the first filter screen 14 (larger aperture) and the second filter screen 15 (smaller aperture) assembled at the top for graded filtration. After filtering out the metal chips, they are separated and collected for processing.

[0039] See Figure 1 , Figure 10 and Figure 11As shown, a switching mechanism 11 for convenient switching of drill bits 22 is provided at the drill spindle 21. The switching mechanism 11 includes a mounting block 111 fixedly connected to the drill spindle 21. A guide rail frame 112 is rotatably connected to the mounting block 111. Multiple storage frames 113 are fixedly mounted on the guide rail frame 112. The storage frames 113 are arranged in an arc shape along the guide rail on the guide rail frame 112. An assembly block 114 is rotatably connected to one side of the storage frame 113. The assembly block 114 is square and has a through slot for placing drill bits 22 inside. Each slot of the assembly block 114 holds a spare drill bit 22 of a different model adapted to be installed on the drill spindle 21. The drill bit 22 has a limiting member 12 at one end of the storage frame 113 for limiting the assembly block 114. After the drill bit 22 is removed from the drill spindle 21, it is placed into the through slot of the corresponding assembly block 114. Then, by rotating the assembly block 114, the drill bit 22 can be stored in the storage frame 113. By rotating the storage frame 113 on the guide rail frame 112, the required size of the drill bit 22 in the storage frame 113 can be quickly switched. Then, by rotating the drill bit 22 on the assembly block 114 in the storage frame 113, the required drill bit 22 is quickly aligned with the drill spindle 21. Finally, the aligned drill bit 22 is installed on the drill spindle 21.

[0040] See Figure 10 and Figure 11 As shown, the limiting component 12 includes a limiting plate 121, a guide rod 122, and a spring 123. The storage frame 113 is provided with a limiting plate 121 at one end near the assembly block 114. The limiting plate 121 is slidably connected to the storage frame 113 through the guide rod 122. The guide rod 122 and the assembly block 114 are hinged to each other. A spring 123 is provided between the storage frame 113 and the guide rod 122. Under the action of the spring 123, the limiting plate 121 elastically contacts and limits itself on the assembly block 114, so that the assembly block 114 can drive the drill bit 22 to rotate and switch stably within the storage frame 113.

[0041] See Figure 11 and Figure 12 As shown, a locking rod 13 is slidably connected to the connection end of the mounting block 111 and the guide rail frame 112. The locking rod 13 is slidably embedded in the mounting block 111. A spring 131 is provided between the mounting block 111 and the locking rod 13. The rod end of the locking rod 13 is an arc end face. Multiple slots 132 for matching the locking rod 13 are spaced apart on the guide rail frame 112. The slots 132 on the guide rail frame 112 correspond to the positions of the storage frame 113. When the storage frame 113 on the guide rail frame 112 is switched by rotating on the mounting block 111, the locking rod 13 in the mounting block 111 will be locked into the slot 132 of the corresponding storage frame 113 under the action of the spring 131, thereby firmly locking the guide rail frame 112 in the current state on the mounting block 111, ensuring that the storage frame 113 can be stably switched on the mounting block 111.

[0042] When it is necessary to replace the drill bit 22 on the drill spindle 21, first remove the drill bit 22 from the current drill spindle 21. After the removed drill bit 22 is separated from the drill spindle 21, it is placed into the through slot of the assembly block 114 inside the target storage frame 113. Then, rotate the assembly block 114, moving the assembly block 114 along with the drill bit 22 to the storage position inside the storage frame 113. At this time, under the elastic force of the spring 123, the limiting member 12 elastically presses against the assembly block 114 through the limiting plate 121, stably restricting the assembly block 114 in the storage position. When a specific spare drill bit 22 needs to be replaced, the operator manually rotates the entire guide rail frame 112. The guide rail frame 112 drives all the fixedly assembled storage frames 113 on it to rotate together. When the storage frame 113 containing the required drill bit 22 rotates... When the drill bit is moved to the working position aligned with the drill spindle 21, the slidingly connected locking rod 13 inside the mounting block 111 will automatically engage with the corresponding slot 132 on the guide rail frame 112 under the elastic force of its internal spring 131, making a positioning sound and firmly locking the guide rail frame 112. Finally, the target assembly block 114 inside the storage frame 113 is manually rotated. At this time, the assembly block 114 will overcome the elastic resistance of the limiting member 12 and rotate, driving the spare drill bit 22 in its through slot to rotate out of the storage position until the mounting shank of the drill bit 22 is precisely aligned with and close to the mounting interface of the drill spindle 21. At this time, the operator can take out the aligned drill bit 22 and install it onto the drill spindle 21, thereby realizing the quick replacement of the required drill bit 22.

[0043] Although this disclosure has been shown and described with reference to specific exemplary embodiments thereof, those skilled in the art will understand that various changes in form and detail may be made to this disclosure without departing from the spirit and scope of the disclosure as defined by the appended claims and their equivalents. Therefore, the scope of this disclosure should not be limited to the above embodiments, but should be defined not only by the appended claims, but also by their equivalents.

Claims

1. A tapping device for injection mold manufacturing, comprising a machine table (1) and a numerical control drilling machine (2), the numerical control drilling machine (2) is assembled on the machine table (1), and a drill bit (22) is installed on a drilling machine spindle (21) of the numerical control drilling machine (2); characterized in that Further comprising: a guide frame (3) fixedly arranged on the top of the machine table (1), the guide frame (3) is a circular arc frame body; an arc-shaped guide rail (31) is fixedly arranged on the inner wall of the guide frame (3), and a sliding table (4) is slidingly assembled on the arc-shaped guide rail (31); a workpiece clamp (5) is installed on the sliding table (4), and a driving mechanism (6) for driving the sliding table (4) to move is arranged in the guide frame (3); a flushing mechanism (7) for flushing the drill hole is arranged in the upper frame body of the guide frame (3); a cleaning mechanism (8) is arranged near the drilling machine spindle (21) of the numerical control drilling machine (2), and the cleaning mechanism (8) comprises: a fixed block (81) fixedly connected to the numerical control drilling machine (2) near the drilling machine spindle (21); a mounting bracket (82) fixedly mounted on the drilling machine spindle (21); a cleaning brush (84) is symmetrically connected to the lower two sides of the mounting bracket (82) through a rotating shaft (83), and a torsional spring (86) is arranged between the mounting bracket (82) and the rotating shaft (83); a pull rope (85) is penetratingly and slidingly connected to the mounting bracket (82), and the two ends of the pull rope (85) are fixedly connected to the two rotating shafts (83), respectively, and the pull rope (85) is vertically corresponding to the fixed block (81); a spray pipe (9) is installed in the mounting bracket (82); a switching mechanism (11) for conveniently switching the drill bit (22) is arranged at the drilling machine spindle (21), the switching mechanism (11) comprises a mounting block (111) fixedly connected to the drilling machine spindle (21), a guide rail bracket (112) rotatably connected to the mounting block (111), a plurality of storage boxes (113) fixedly assembled on the guide rail bracket (112), the storage boxes (113) are arranged in a circular arc shape on the guide rail bracket (112), an assembly block (114) is rotatably connected to one side of the storage box (113), the assembly block (114) is square-shaped and has a through slot in the interior for placing the drill bit (22), one of the assembly blocks (114) is provided with a spare drill bit (22) of different models matched with the drilling machine spindle (21), and one end of the storage box (113) is provided with a limiting piece (12) for limiting the assembly block (114).

2. The apparatus according to claim 1, wherein The driving mechanism (6) comprises an arc-shaped rack (61), a bidirectional motor (62) and a gear (63), the bottom of the arc-shaped guide rail (31) is fixedly provided with the arc-shaped rack (61), the bidirectional motor (62) is fixedly installed in the sliding table (4), and the bidirectional output shaft of the bidirectional motor (62) is fixedly connected with the gear (63).

3. The apparatus according to claim 2, wherein The flushing mechanism (7) comprises a flushing pipe (71) rotatably connected to the inner wall of the upper part of the guide frame (3), a nozzle for flushing the mold workpiece (100) is formed on the pipe body of the flushing pipe (71), the upper part of the guide frame (3) is an inclined frame body, and the side wall is symmetrically provided with a sliding groove (32), the two ends of the flushing pipe (71) extend into the sliding groove (32) of the guide frame (3), a servo motor (72) is fixedly installed on the outer wall of the upper part of the guide frame (3), the two ends of the flushing pipe (71) are fixedly connected with connecting rods (73), the outer wall of the guide frame (3) near the connecting rod (73) is rotatably connected with a sleeve rod (74), the sleeve rod (74) and the connecting rod (73) on the same side are in sliding fit, the output shaft of the servo motor (72) is connected with the rotating shaft (83) of the connecting rod (73) on the same side, and the inner wall of the guide frame (3) corresponding to the sliding groove (32) is slidably connected with a baffle (75), and the baffle (75) and the flushing pipe (71) are in rotational fit.

4. The apparatus according to claim 3, wherein The machine table (1) is provided with a conveying mechanism (10) for conveying cutting fluid, the conveying mechanism (10) comprises a liquid storage tank (101) fixedly arranged in the machine table (1), the liquid storage tank (101) is located below the guide frame (3), the surface of the machine table (1) corresponding to the liquid storage tank (101) is open, two liquid pumps (102) are installed on the liquid storage tank (101), the liquid inlet of the liquid pump (102) is connected to the bottom of the liquid storage tank (101) through a pipeline, the liquid outlet of one of the liquid pumps (102) is connected to the flushing pipe (71) through a conveying pipe (103), and the liquid outlet of the other liquid pump (102) is connected to the spraying pipe (9) through a conveying pipe (104).

5. The apparatus according to claim 4, wherein The limiting piece (12) comprises a limiting plate (121), a guide rod (122) and a spring (123), one end of the storage frame (113) close to the assembly block (114) is provided with the limiting plate (121), the limiting plate (121) is slidably connected with the storage frame (113) through the guide rod (122), the guide rod (122) and the assembly block (114) are hingedly connected, and the spring (123) is arranged between the storage frame (113) and the guide rod (122).

6. The apparatus according to claim 5, wherein The connecting end of the mounting block (111) and the guide rail frame (112) is slidably connected with a clamping rod (13), the clamping rod (13) is slidably embedded in the mounting block (111), the spring (131) is arranged between the mounting block (111) and the clamping rod (13), the rod end of the clamping rod (13) is a circular arc end face, a plurality of clamping grooves (132) suitable for the clamping rod (13) are formed on the guide rail frame (112) at intervals, and the clamping grooves (132) on the guide rail frame (112) correspond to the positions of the storage frames (113) respectively.

7. The apparatus according to claim 6, wherein The upper part of the inner wall of the liquid storage tank (101) is equipped with a first filter screen (14) and a second filter screen (15), the filter screen aperture of the first filter screen (14) is larger than that of the second filter screen (15), and the first filter screen (14) and the second filter screen (15) are used for filtering the cutting fluid flowing back into the liquid storage tank (101).

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