A valve stem perforating machine

Abstract

The present application relates to the technical field of valve production, and particularly relates to a valve rod perforating machine, which adopts electric spark perforation to avoid the defects of drill bit drilling, realizes perforation of valve rods in two directions by one device, simplifies operation and is high in working efficiency; the valve rod perforating machine comprises a rack, a vertical plate installed on the vertical frame of the rack, an electric spark machine installed on the top of the vertical plate, and a perforating rod installed on the chuck of the electric spark machine; the valve rod perforating machine further comprises a turnover plate, a sliding table, a push cylinder, a translation mechanism and a clamping mechanism, the turnover plate is rotatably installed in the notch of the vertical plate, the translation mechanism is arranged on the front end face of the turnover plate, the sliding table is installed on the translation mechanism, the clamping mechanism is installed on the front end face of the sliding table, the fixed end of the push cylinder is rotatably installed on a support, the support is installed on the vertical frame of the rack, the moving end of the push cylinder is rotatably connected with the rear end face of the turnover plate, the push cylinder is retracted to make the turnover plate vertical, the perforating rod perforates the valve rod in the axial direction, the push cylinder is elongated to make the turnover plate horizontal, and the perforating rod perforates the valve rod in the radial direction.

Description

Technical Field

[0001] This invention relates to the technical field of valve manufacturing, and in particular to a perforation machine for valve stems. Background Technology

[0002] The valve stem is the component on a valve used to drive the valve core. The upper end of the valve stem extends above the middle of the valve. Rotating the valve stem drives the valve core to rotate or lift, thus opening or closing the valve. During the valve stem manufacturing process, the formed blank needs to undergo multiple machining processes. After cutting the blank, a valve stem with a head and a stem portion is initially formed. Then, a hole is drilled in the axial center or radial portion of the valve stem. The traditional method for drilling this hole is using a drill bit. Existing technologies have many devices for drilling the radial portion of the valve stem, such as those proposed in publication number "CN207127303U". A valve stem drilling machine and a valve stem head drilling machine are disclosed in publication number "CN208496433U". However, there are few machines that can drill through the axial center of the valve stem, and even fewer machines that can drill through the valve stem in both axial and radial directions. Moreover, when drilling through the axial center of the valve stem, a very long drill bit is required. Drilling with a long drill bit has many disadvantages, such as easy breakage and difficulty in ensuring the concentricity of the drilled hole. Drilling through the valve stem in two directions requires two machines and two disassembly and assembly of the valve stem, which leads to complicated operation and low work efficiency. Summary of the Invention

[0003] To solve the above-mentioned technical problems, the present invention provides a valve stem drilling machine that uses electric spark drilling to avoid the drawbacks of drill bit drilling, realizes two-way drilling of valve stem with one machine, simplifies operation and has high working efficiency.

[0004] This invention discloses a valve stem piercing machine, comprising a frame, a vertical plate, an electrical discharge machine (EDM), and a piercing rod. The frame is provided with a base and a vertical frame. The vertical plate is mounted on the vertical frame of the frame. The EDM is mounted on the top of the front end face of the vertical plate. A piercing rod is mounted on the chuck of the EDM, with the piercing rod pointing vertically downwards. The machine also includes a flip plate, a slide, a push cylinder, a translation mechanism, and a clamping mechanism. The EDM and the piercing rod perform EDM piercing on the valve stem. A slot is provided in the middle of the vertical plate. The flip plate is rotatably connected to the left and right side walls of the slot on the vertical plate via a shaft. Next, a translation mechanism is provided on the front end face of the flapper, which drives the valve stem to move. A slide is mounted on the translation mechanism, and a clamping mechanism is mounted on the front end face of the slide. The clamping mechanism clamps the valve stem, and the clamping center of the clamping mechanism is coaxially aligned with the perforated rod. The fixed end of the push cylinder is rotatably mounted on a bracket, which is mounted on the vertical frame of the machine frame. The moving end of the push cylinder is rotatably connected to the rear end face of the flapper. When the push cylinder retracts, the flapper becomes vertical, and the perforated rod axially perforates the valve stem. When the push cylinder extends, the flapper becomes horizontal, and the perforated rod radially perforates the valve stem. Perforation: The frame supports the upright plate, clamps the valve stem onto the clamping mechanism, extends the push cylinder, and pushes the flapper to rotate, making the flapper horizontal. The translation mechanism is then operated, moving the valve stem via the slide table until the radial position of the valve stem to be perforated is aligned with the perforating rod. The EDM machine is started, driving the perforating rod to extend vertically downwards. The conductive medium and the perforating rod are energized to radially perforate the valve stem. After radial perforation, the EDM machine drives the perforating rod to reset, and the push cylinder retracts, causing the flapper to rotate vertically. The valve stem is reset, and the translation mechanism is operated to align the top of the valve stem with the bottom of the perforating rod. The EDM machine is then restarted, driving the perforating rod to extend vertically downwards. The conductive medium and the perforating rod are energized to axially perforate the center of the valve stem's end face. After axial perforation is completed, the EDM machine drives the perforating rod to reset, and the perforated valve stem is removed. Using EDM perforation avoids the drawbacks of drilling with a drill bit, allowing one machine to perform perforation processing on the valve stem in two directions. Only one valve stem disassembly and assembly is required, simplifying the operation and increasing work efficiency.

[0005] Preferably, the translation mechanism includes two slide rails, a lead screw, and a stepper motor. The two slide rails are installed parallel to each other on the front end face of the flap, and are arranged perpendicular to the rotation axis of the flap. The slide table is slidably mounted on the two slide rails via a slider. The upper and lower ends of the lead screw are rotatably mounted on two supports, which are installed at the upper and lower ends of the front end face of the flap. The lead screw is connected to the slide table via a lead screw nut. The stepper motor is mounted on the flap, and the output shaft of the stepper motor is concentrically connected to the lead screw. The stepper motor drives the lead screw to rotate, and the lead screw drives the slide table to move along the two slide rails via the lead screw nut, thereby realizing the automatic adjustment of the relative position of the valve stem and the perforated rod. Moreover, it enables the EDM machine to load extra-long perforated rods and perform deep hole machining on the axial direction of the valve stem, making it highly practical.

[0006] Preferably, the clamping mechanism includes two clamping plates, clamping seat one, clamping seat two, a push rod, clamping seat three, clamping seat four, and a cam. The two clamping plates are symmetrically mounted on the upper surface of the slide table. Clamping seat one and clamping seat two are mounted on the inner wall of one clamping plate. A sliding rod is provided in the middle of the push rod, which is located inside the other clamping plate. The sliding rod of the push rod is slidably connected to the aforementioned clamping plates. Clamping seat three and clamping seat four are mounted at the front and rear ends of the push rod. Clamping seat one and clamping seat two are respectively connected to clamping seat three and clamping seat four. The cam is symmetrically mounted on the slide bar of the push rod. The wheel surface of the cam slides in contact with the card seat on the outer wall of the clamping plate. A handle is mounted on the cam. When clamping the valve stem, the valve stem is placed between clamping seats one and two and clamping seats three and four. By rotating the cam with the handle, when the protruding end of the cam contacts the card seat on the outer wall of the clamping plate, the cam pushes the push rod inward, so that clamping seats three and four press the valve stem tightly against clamping seats one and two, thereby achieving rapid clamping of the valve stem and improving work efficiency.

[0007] Preferably, the device also includes multiple sliding grooves and multiple positioning screws. Multiple sliding grooves are symmetrically arranged on the left and right sides of the upper end face of the slide table. The two clamping plates are slidably connected to the multiple sliding grooves through multiple sliders. Multiple positioning screws are rotatably screwed onto each of the multiple clamping plates, and the multiple positioning screws lock the two clamping plates on the slide table. The two clamping plates can be moved along the multiple sliding grooves, thereby changing the distance between the two clamping plates, so that the device can be used for valve stems of different diameters and improve versatility.

[0008] Preferably, the device also includes a second slide rail and two locking screws. The second slide rail is installed on the inner wall of the clamping plate. The second clamping seat is slidably installed on the second slide rail, and the fourth clamping seat is slidably installed on the push rod. Both the second and fourth clamping seats are rotatably screwed with locking screws. One locking screw locks the fourth clamping seat onto the push rod, and the other locking screw locks the second clamping seat onto the second slide rail. The second and fourth clamping seats are moved along the second slide rail and the push rod, and the two locking screws are tightened to position the second and fourth clamping seats, so that the device can be used for valve stems of different lengths, improving versatility.

[0009] Preferably, it also includes two slides and two rollers. The two slides are respectively installed on the top of the two clamping plates, and the two rollers are respectively slidably installed in the two slides through the brackets. Each of the two slides is provided with a locking screw for the roller bracket. Moving the two rollers causes them to roll and clamp the perforated rod, providing auxiliary limiting support for the perforated rod. Tightening the locking screws on the two slides positions the two rollers and improves the stability of the perforated rod.

[0010] Preferably, it also includes two pneumatic pins and two ear plates. The two pneumatic pins are respectively installed on the left and right sides of the upper part of the upright plate, and the two ear plates are respectively installed on the left and right sides of the upper part of the flip plate. The telescopic rods of the two pneumatic pins are aligned with the two ear plates. When the flip plate is in a vertical state for axial deep hole machining, the telescopic pins of the two pneumatic pins are inserted into the two ear plates to position the flip plate, thereby improving the stability during machining.

[0011] Preferably, it also includes two pneumatic pins, which are installed on the left and right sides of the middle of the upright plate, respectively. The two pneumatic pins are located directly in front of the rotating shaft of the flip plate, and positioning holes are provided on both the left and right sides of the flip plate. When the flip plate is in a horizontal state and is performing radial perforation work, the telescopic pins of the two pneumatic pins are inserted into the two positioning holes of the flip plate to position the flip plate, thereby improving the stability during processing.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows: The frame supports the upright plate, the valve stem is clamped onto the clamping mechanism, the push cylinder is extended, the push cylinder pushes the flap to rotate, so that the flap is in a horizontal state, the translation mechanism is operated, the translation mechanism drives the valve stem to move through the slide table, so that the radial position of the valve stem to be perforated is aligned with the perforating rod, the EDM is started, the EDM drives the perforating rod to extend vertically downward, the conductive medium and the perforating rod are energized to radially perforate the rod of the valve stem, after the radial perforation is completed, the EDM drives the perforating rod to reset, and the push cylinder... The retraction mechanism causes the flapper to vertically reset. The translation mechanism is then operated to align the top of the valve stem with the bottom of the perforating rod. The EDM machine is restarted, driving the perforating rod to extend vertically downwards. The conductive medium and the perforating rod are energized to axially perforate the center of the valve stem's end face. After axial perforation is completed, the EDM machine drives the perforating rod to reset, and the perforated valve stem is removed. Using EDM perforation avoids the drawbacks of drilling with a drill bit, allowing one machine to perform perforation processing on the valve stem in two directions. Only one valve stem disassembly and assembly is required, simplifying operation and increasing work efficiency. Attached Figure Description

[0013] Figure 1 This is an exploded structural diagram of the present invention;

[0014] Figure 2 This is a schematic diagram of the shaft side structure during axial perforation processing according to the present invention;

[0015] Figure 3 This is a side view of the axial perforation process of the present invention.

[0016] Figure 4 This is a schematic diagram of the axial structure during radial perforation processing according to the present invention;

[0017] Figure 5 This is a side view of the radial perforation process of the present invention.

[0018] Figure 6 This is an enlarged structural diagram of the slide table and clamping mechanism, etc.

[0019] Figure 7 This is an enlarged structural diagram of a translation mechanism and other similar structures;

[0020] The following components are labeled in the attached diagram: 1. Frame; 2. Vertical plate; 3. EDM machine; 4. Perforating rod; 5. Flip plate; 6. Slide table; 7. Push cylinder; 8. Slide rail; 9. Lead screw; 10. Stepper motor; 11. Clamping plate; 12. Clamping seat one; 13. Clamping seat two; 14. Push rod; 15. Clamping seat three; 16. Clamping seat four; 17. Cam; 18. Slide groove; 19. Positioning screw; 20. Slide rail two; 21. Locking screw; 22. Slide seat; 23. Roller; 24. Pneumatic pin; 25. Ear plate; 26. Pneumatic pin two. Detailed Implementation

[0021] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. The present invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

[0022] Example 1

[0023] like Figures 1 to 5 As shown, a valve stem piercing machine includes a frame 1, a vertical plate 2, an EDM machine 3, and a piercing rod 4. The frame 1 is equipped with a base and a vertical frame. The vertical plate 2 is mounted on the vertical frame of the frame 1. The EDM machine 3 is mounted on the top of the front end face of the vertical plate 2. The piercing rod 4 is mounted on the chuck of the EDM machine 3, and the piercing rod 4 is vertically downward. The machine also includes a flip plate 5, a slide table 6, a push cylinder 7, a translation mechanism, and a clamping mechanism. The EDM machine 3 and the piercing rod 4 perform EDM piercing on the valve stem. A groove is provided in the middle of the vertical plate 2. The flip plate 5 is rotatably connected to the left and right side walls of the groove in the vertical plate 2 via a shaft. A translation mechanism is provided on the front end face of the flip plate 5, which drives the valve stem to move. The slide table 6 is mounted on the translation mechanism. A clamping mechanism is installed on the front end face of the platform 6. The clamping mechanism clamps the valve stem. The clamping center of the clamping mechanism is coaxially aligned with the perforated rod 4. The fixed end of the push cylinder 7 is rotatably mounted on the bracket. The bracket is mounted on the upright of the frame 1. The moving end of the push cylinder 7 is rotatably connected to the rear end face of the flip plate 5. When the push cylinder 7 retracts, the flip plate 5 becomes vertical. The perforated rod 4 axially perforates the valve stem. When the push cylinder 7 extends, the flip plate 5 becomes horizontal. The perforated rod 4 radially perforates the valve stem. The platform also includes two slides 22 and two rollers 23. The two slides 22 are respectively mounted on the top of the two clamping plates 11. The two rollers 23 are respectively slidably mounted in the two slides 22 through the bracket. Each slide 22 is provided with a locking screw for the roller 23 bracket.

[0024] The valve stem is clamped onto the clamping mechanism. The push cylinder 7 extends, causing the flapper 5 to rotate and become horizontal. The translation mechanism, via the slide table 6, moves the valve stem until the radial position of the valve stem requiring perforation aligns with the perforating rod 4. The EDM machine 3 starts, driving the perforating rod 4 to extend vertically downwards. The conductive medium and the perforating rod 4 are energized to radially perforate the valve stem. After radial perforation, the EDM machine 3 drives the perforating rod 4 to reset. The cylinder 7 retracts, causing the flap 5 to vertically reset. The operation of the translation mechanism aligns the top of the valve stem with the bottom of the perforated rod 4. The EDM machine 3 is restarted, driving the perforated rod 4 to extend vertically downwards. Two rollers 23 clamp the bottom of the perforated rod 4, providing auxiliary limiting support. The conductive medium and the perforated rod 4 are energized to perform axial depth perforation at the center of the valve stem end face. After the axial perforation is completed, the EDM machine 3 drives the perforated rod 4 to reset, and the perforated valve stem is removed.

[0025] Example 2

[0026] like Figures 6 to 7 As shown, the clamping mechanism includes two clamping plates 11, a first clamping seat 12, a second clamping seat 13, a push rod 14, a third clamping seat 15, a fourth clamping seat 16, and a cam 17. The two clamping plates 11 are symmetrically mounted on the upper surface of the slide table 6. The first clamping seat 12 and the second clamping seat 13 are mounted on the inner wall of one clamping plate 11. A sliding rod is provided in the middle of the push rod 14, which is located inside the other clamping plate 11. The sliding rod of the push rod 14 is slidably connected to the aforementioned clamping plate 11. The third clamping seat 15 and the fourth clamping seat 16 are mounted at the front and rear ends of the push rod 14, respectively. The first clamping seat 12 and the second clamping seat 13 are symmetrical to the third clamping seat 15 and the fourth clamping seat 16. The cam 17 is rotatably mounted on the sliding rod of the push rod 14. The wheel surface of the cam 17 slides in contact with the card seat on the outer wall of the clamping plate 11. A [missing information - likely a device or component] is mounted on the cam 17. The handle also includes multiple slide grooves 18 and multiple positioning screws 19. Multiple slide grooves 18 are symmetrically arranged on the left and right sides of the upper end face of the slide table 6. The two clamping plates 11 are slidably connected to the multiple slide grooves 18 through multiple sliders. Multiple positioning screws 19 are rotatably screwed onto each of the multiple clamping plates 11, and the multiple positioning screws 19 lock the two clamping plates 11 onto the slide table 6. The handle also includes a second slide rail 20 and two locking screws 21. The second slide rail 20 is installed on the inner wall of the clamping plate 11. The second clamping seat 13 is slidably installed on the second slide rail 20, and the fourth clamping seat 16 is slidably installed on the push rod 14. Locking screws 21 are rotatably screwed onto both the second clamping seat 13 and the fourth clamping seat 16. One locking screw 21 locks the fourth clamping seat 16 onto the push rod 14, and the other locking screw 21 locks the second clamping seat 13 onto the second slide rail 20.

[0027] When changing the valve stem specifications, move the two clamping plates 11 along the multiple slide grooves 18 to change the distance between the two clamping plates 11. Move the clamping seats 13 and 16 along the slide rail 20 and push rod 14, and tighten the two locking screws 21 to position the clamping seats 13 and 16. When clamping the valve stem, place the valve stem between the clamping seats 12 and 13 and the clamping seats 35 and 16. Rotate the cam 17 by the handle. When the protruding end of the cam 17 contacts the card seat on the outer wall of the clamping plate 11, the cam 17 pushes the push rod 14 inward, so that the clamping seats 35 and 16 press the valve stem against the clamping seats 12 and 13, thus achieving quick clamping of the valve stem.

[0028] like Figures 1 to 7 As shown, the valve stem piercing machine of the present invention, when in operation, firstly places the valve stem between clamping seats 12 and 23 and clamping seats 35 and 46. By rotating the cam 17 with a handle, when the protruding end of the cam 17 contacts the retainer on the outer wall of the clamping plate 11, the cam 17 pushes the push rod 14 inward, causing clamping seats 35 and 416 to press the valve stem tightly against clamping seats 12 and 23. Then, the push cylinder 7 extends, pushing the flip plate 5 to rotate, making the flip plate 5 horizontal. The telescopic pins of the two pneumatic pins 26 are respectively inserted into the two positioning holes of the flip plate 5 to position the flip plate 5. Then, the stepper motor 10 runs, driving the lead screw 9 to rotate. The lead screw 9, through the lead screw nut, drives the slide table 6 to move along the two slide rails 8, causing the slide table 6 to move the valve stem, so that the radial position of the valve stem to be pierced is aligned with the piercing point. Align the perforated rod 4, start the EDM machine 3, and drive the perforated rod 4 to extend vertically downwards. The conductive medium and the perforated rod 4 are energized to radially perforate the valve stem. After radial perforation, the EDM machine 3 drives the perforated rod 4 to reset. The push cylinder 7 retracts, causing the flap 5 to reset vertically. The telescopic pins of the two pneumatic pins 24 are inserted into the two ear plates 25 to position the flap 5. The stepper motor 10 runs, driving the lead screw 9 to rotate. The lead screw 9 drives the slide table 6 to move along the two slide rails 8 through the lead screw nut, causing the slide table 6 to move the valve stem so that the top of the valve stem contacts and aligns with the bottom of the perforated rod 4. Finally, start the EDM machine 3 again, and drive the perforated rod 4 to extend vertically downwards. The conductive medium and the perforated rod 4 are energized to axially perforate the center of the valve stem end face. After axial perforation, the EDM machine 3 drives the perforated rod 4 to reset. The perforated valve stem can then be removed.

[0029] The main functions achieved by this invention are:

[0030] 1. Electrical discharge machining avoids the drawbacks of drilling with a drill bit;

[0031] 2. It can perform perforation processing on the valve stem in two directions, requiring only one disassembly and assembly of the valve stem, simplifying the operation and increasing work efficiency.

[0032] The valve stem piercing machine of the present invention uses common mechanical methods for installation, connection, or setting. Any method that can achieve the desired effect can be implemented. The frame, upright plate, EDM machine, piercing rod, slide table, push cylinder, slide rail, lead screw, stepper motor, cam, positioning screw, slide rail II, locking screw, roller, pneumatic pin, and pneumatic pin II of the valve stem piercing machine of the present invention are commercially available. Technicians in the industry only need to install and operate it according to the accompanying instruction manual, without requiring any creative work from those skilled in the art.

[0033] All technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the specification of this invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0034] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A valve stem perforating machine, comprising a frame (1), a vertical plate (2), an electric spark machine (3) and a perforating rod (4), the frame (1) is provided with a base frame and a vertical frame, the vertical plate (2) is installed on the vertical frame of the frame (1), the electric spark machine (3) is installed on the top of the front end face of the vertical plate (2), the perforating rod (4) is installed on the chuck of the electric spark machine (3), and the perforating rod (4) vertically faces downward; characterized in that, It also includes a flap (5), a sliding platform (6), a push cylinder (7), a translation mechanism and a clamping mechanism, the electric spark machine (3) and the perforating rod (4) are used for electric spark perforating the valve rod, the middle part of the vertical plate (2) is provided with a notch, the flap (5) is rotationally connected with the left and right side walls of the notch of the vertical plate (2) through a shaft rod, the front end face of the flap (5) is provided with a translation mechanism, the translation mechanism drives the valve rod to move, the sliding platform (6) is installed on the translation mechanism, the front end face of the sliding platform (6) is provided with a clamping mechanism, the clamping mechanism clamps the valve rod, the clamping center of the clamping mechanism is coaxially aligned with the perforating rod (4), the fixed end of the push cylinder (7) is rotationally installed on a support, the support is installed on the vertical frame of the rack (1), the moving end of the push cylinder (7) is rotationally connected with the rear end face of the flap (5), the push cylinder (7) retracts the flap (5) vertically, the perforating rod (4) is used for axially perforating the valve rod, the push cylinder (7) is elongated to make the flap (5) horizontal, and the perforating rod (4) is used for radially perforating the valve rod. The clamping mechanism comprises two clamping plates (11), a clamping seat one (12), a clamping seat two (13), a push rod (14), a clamping seat three (15), a clamping seat four (16) and a cam (17), the two clamping plates (11) are symmetrically installed on the upper end face of the sliding platform (6), the clamping seat one (12) and the clamping seat two (13) are installed on the inner wall of one clamping plate (11), the middle part of the push rod (14) is provided with a sliding rod, the push rod (14) is located on the inner side of the other clamping plate (11), the sliding rod of the push rod (14) is slidably connected with the clamping plate (11), the clamping seat three (15) and the clamping seat four (16) are installed on the front and rear ends of the push rod (14), the clamping seat one (12) and the clamping seat two (13) are symmetrically arranged with the clamping seat three (15) and the clamping seat four (16) respectively, the cam (17) is rotationally installed on the sliding rod of the push rod (14), the wheel surface of the cam (17) is slidably in contact with the clamping seat of the outer wall of the clamping plate (11), and the cam (17) is provided with a handle. It also comprises two sliding seats (22) and two rollers (23), the two sliding seats (22) are respectively installed at the top ends of the two clamping plates (11), and the two rollers (23) are respectively slidably installed in the two sliding seats (22) through supports. Locking screws of roller (23) supports are arranged on the two sliding seats (22).

2. A valve stem piercing machine as defined in claim 1, wherein, The translation mechanism comprises two sliding rails (8), a lead screw (9) and a stepping motor (10), the two sliding rails (8) are parallelly installed on the front end face of the flap (5), the two sliding rails (8) are vertically arranged with the rotation shaft of the flap (5), the sliding platform (6) is slidably installed on the two sliding rails (8) through a sliding block, the upper and lower ends of the lead screw (9) are rotationally installed on two supports, the two supports are installed on the upper and lower ends of the front end face of the flap (5), the lead screw (9) is drivingly connected with the sliding platform (6) through a lead screw nut, the stepping motor (10) is installed on the flap (5), and the output shaft of the stepping motor (10) is coaxially drivingly connected with the lead screw (9).

3. The valve stem piercing machine of claim 1 wherein, It also includes multiple sliding grooves (18) and multiple positioning screws (19), the upper end surface of the sliding table (6) is symmetrically provided with multiple sliding grooves (18) on the left and right sides, two clamping plates (11) are respectively connected with multiple sliding grooves (18) through multiple sliding blocks, multiple positioning screws (19) are rotatably screwed on multiple clamping plates (11), and the two clamping plates (11) are locked on the sliding table (6) by the multiple positioning screws (19).

4. The valve stem piercing machine of claim 1 wherein, It also includes a sliding rail two (20) and two locking screws (21), the sliding rail two (20) is installed on the inner wall of the clamping plate (11), the clamping seat two (13) is slidably installed on the sliding rail two (20), the clamping seat four (16) is slidably installed on the push rod (14), the locking screws (21) are rotatably screwed on the clamping seat two (13) and the clamping seat four (16), one locking screw (21) locks the clamping seat four (16) on the push rod (14), and the other locking screw (21) locks the clamping seat two (13) on the sliding rail two (20).

5. The valve stem piercing machine of claim 1 wherein, It also includes two pneumatic bolts (24) and two ear plates (25), the two pneumatic bolts (24) are respectively installed on the left and right sides of the upper portion of the stand plate (2), the two ear plates (25) are respectively installed on the left and right sides of the upper portion of the turning plate (5), and the extension rods of the two pneumatic bolts (24) are respectively aligned with the two ear plates (25).

6. A valve stem piercing machine as defined in claim 1 wherein, It also includes two pneumatic bolts two (26), the two pneumatic bolts two (26) are respectively installed on the left and right sides of the middle portion of the stand plate (2), and the two pneumatic bolts two (26) are respectively located in front of the shafts of the turning plates (5).

Images