Gas cutting tool for removing dead head arranged at circular ring-shaped part

Abstract

The utility model provides a gas cutting tool for removing a riser arranged at a circular ring. The gas cutting tool comprises a platform, the device further comprises a supporting disc, the top face of the supporting disc is used for bearing and placing castings, and a plurality of pushing mechanisms used for pushing the castings to be centered are installed on the edge of the top of the supporting disc in an annular array mode. The supporting disc is arranged on the top face of the platform, and a first motor used for driving the supporting disc to rotate is fixedly installed on the bottom face of a platen of the platform. And the gas cutting gun is connected with a transverse adjusting mechanism, the transverse adjusting mechanism is connected with a vertical adjusting mechanism, and the bottom of the vertical adjusting mechanism is installed on the side wall of the platform. The casting is driven by the supporting disc to rotate, so that the annular part, needing gas cutting of the riser, of the top of the casting does circular motion relative to the gas cutting gun, automatic gas cutting is achieved, manual operation is not needed, cutting is smooth, and the problem that the riser is not cleaned up or the defect of casting meat digging is overcome.

Description

Technical Field

[0001] This utility model relates to the field of casting processing, and in particular to an oxy-fuel cutting fixture for removing risers located at an annular position. Background Technology

[0002] In the casting process of valves, in order to ensure the internal quality of the complex casting body and to eliminate defects such as shrinkage porosity and slag porosity, many risers are often placed at the weld ends and flanges of the casting.

[0003] The weld ends and flanges of castings are usually circular in shape. When the riser is placed in the circular part of the casting, the shape and wall thickness of the casting cannot be well maintained when the riser is manually cut with gas. This results in the riser not being cleaned properly or defects such as the casting being cut out. This requires rough turning on a machine tool or subsequent welding and grinding repair, which increases production costs. The repair will also lead to the extension of the casting delivery time. Utility Model Content

[0004] This utility model provides an oxy-gas cutting fixture for removing risers located at annular locations to solve the technical problem of incomplete removal of risers or casting defects caused by manual oxy-gas cutting.

[0005] This utility model solves the above-mentioned technical problems through the following technical solutions:

[0006] This utility model provides an oxy-fuel cutting fixture for removing risers located at an annular position, comprising a platform; and further comprising: a support plate, the top surface of which is used to support and place castings, and a plurality of pusher mechanisms for centering the castings are installed in a circular array along the top edge of the support plate; the support plate is disposed on the top surface of the platform, and a first motor for driving the support plate to rotate is fixedly installed on the bottom surface of the platform; and an oxy-fuel cutting torch, which is connected to a horizontal adjustment mechanism, the horizontal adjustment mechanism being connected to a vertical adjustment mechanism, and the bottom of the vertical adjustment mechanism being installed on the side wall of the platform.

[0007] In this technical solution, the casting rotates by a support plate, causing the annular part of the casting top that needs to be gas-cut to move in a circular motion around the gas cutting gun, thus achieving automatic gas cutting without manual operation. The cut is smooth and avoids problems such as incomplete removal of the riser or defects in the casting.

[0008] Preferably, the support plate is disc-shaped, and a base is fixedly installed at the bottom center of the support plate. The bottom of the base has multiple bottom grooves arranged in a circular array, and each of the multiple bottom grooves is provided with a ball bearing. The ball bearing is in contact with the top surface of the platform. The output shaft end of the first motor is fixedly connected to the middle of the base.

[0009] In this technical solution, the support plate contacts the top surface of the platform through the ball bearings at the bottom of the base. When the support plate is rotated by the first motor, the ball bearings perform rolling friction to reduce frictional resistance.

[0010] Preferably, the pushing mechanism includes a fixed seat fixedly installed on the top edge of the support plate; the fixed seat has a guide hole, and a guide post is connected to the guide hole; an end ball is fixedly connected to one end of the guide post facing the casting, and an end plate is fixedly connected to the other end of the guide post; a threaded tube parallel to the guide post is fixedly connected to the end plate, and the threaded tube extends between the top surface of the platform and the bottom surface of the support plate.

[0011] In this technical solution, the pushing mechanism moves the end ball radially along the support plate. Several pushing mechanisms move radially together and move synchronously toward the axis of the support plate to push the casting placed on the top surface of the support plate to the center for centering.

[0012] Preferably, it further includes a drive mechanism, wherein several of the pushing mechanisms are connected to the drive mechanism, and the drive mechanism includes a second motor, a transmission part and several screws; the second motor is fixedly installed in the support plate, and the second motor is connected to several screws through the transmission part, and the several screws are respectively threaded to several threaded pipes.

[0013] In this technical solution, the drive mechanism is used to synchronously drive all the pushing mechanisms, so that all the pushing mechanisms operate synchronously.

[0014] Preferably, the transmission part includes a first cylindrical gear, a sleeve, a second cylindrical gear, a first bevel gear, and a second bevel gear; the sleeve is rotatably sleeved onto the cylindrical surface of the base, the first bevel gear and the second cylindrical gear are fixedly sleeved on the sleeve, the second cylindrical gear meshes with the first cylindrical gear, the first cylindrical gear is fixedly sleeved with the output shaft of the second motor, the first bevel gear meshes with the second bevel gear, and the middle part of the second bevel gear is fixedly connected to the end of the screw.

[0015] In this technical solution, the transmission unit enables the second motor to synchronously drive all screws to rotate, thereby synchronously driving all pushing mechanisms.

[0016] Preferably, a fixing block is rotatably mounted on one end of each of the screws near the second bevel gear, and the fixing block is fixedly connected to the bottom surface of the support plate.

[0017] In this technical solution, the fixing block provides an installation position for the screw.

[0018] Preferably, the vertical adjustment mechanism includes a vertical rod and a sliding sleeve; the bottom end of the vertical rod is fixedly connected to the platform, and the sliding sleeve is slidably sleeved onto the vertical rod.

[0019] In this technical solution, the vertical height is adjusted by sliding the sliding sleeve along the vertical rod.

[0020] Preferably, a first nut seat is fixedly installed on the front side of the sliding sleeve, the first nut seat is threadedly connected to a first stud, one end of the first stud is pressed against the vertical rod, and the other end of the first stud is fixedly installed with a first rotating disk.

[0021] In this technical solution, the vertical rod is pressed and positioned by tightening the first screw in the first nut seat at the vertical height adjustment port of the sliding sleeve.

[0022] Preferably, the lateral adjustment mechanism includes a movable frame and a clamping assembly; the movable frame is disposed on the back of the sliding sleeve, and one end of the movable frame is fixedly connected to the gas cutting torch, and the clamping assembly clamps the movable frame.

[0023] In this technical solution, when the clamping component releases the movable frame, the movable frame can move laterally to adjust the lateral position of the gas cutting torch.

[0024] Preferably, the clamping assembly includes two positioning strips and a pressure seat fixedly installed; a groove is formed between the two positioning strips, the pressure seat is fitted into the groove, the movable frame is located between the sliding sleeve and the pressure seat, a second nut seat is fixedly installed in the middle of the pressure seat, the second nut seat is threadedly connected to a second stud, one end of the second stud is rotatably connected to the back of the sliding sleeve, and the other end of the second stud is fixedly installed with a second rotating disk.

[0025] In this technical solution, the clamping component is used to clamp and limit the movable frame, so that the movable frame remains in the position after lateral adjustment.

[0026] Based on common knowledge in the field, the above-mentioned preferred conditions can be combined arbitrarily to obtain various preferred embodiments of this utility model.

[0027] The positive and progressive effects of this utility model are as follows:

[0028] The aforementioned gas cutting fixture for removing risers located at annular locations utilizes a support plate to place the casting. Driven by a first motor, the support plate rotates the casting, allowing the gas cutting torch to automatically cut the riser at the annular top of the casting. This eliminates the need for manual operation. Furthermore, the rotation ensures that the annular portion requiring riser cutting moves in a relative circular motion with the gas cutting chamber. Compared to manual gas cutting, this results in a smoother cut and avoids issues such as incomplete removal or casting defects due to difficulty in maintaining the casting's shape and wall thickness. Additionally, several pushing mechanisms are included. After the casting is placed on the support plate, these mechanisms push the casting, automatically centering it on the support plate without manual centering. Moreover, the vertical and horizontal adjustment mechanisms allow for adjustment of the gas cutting torch's vertical height and horizontal position, making it suitable for castings of different heights and diameters. Attached Figure Description

[0029] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0030] Figure 2 This is a side view of the overall structure of this utility model.

[0031] Figure 3 This utility model Figure 2 Enlarged structural diagram of section A in the middle.

[0032] Figure 4 This is a schematic diagram of the material pushing mechanism of this utility model.

[0033] Figure 5 This is a structural schematic diagram of the front of the sliding sleeve of this utility model.

[0034] Figure 6 This is a schematic diagram of the structure of the back of the sliding sleeve of this utility model.

[0035] Explanation of reference numerals in the attached figures

[0036] 1. Platform;

[0037] 2. Support plate;

[0038] 3. Pushing mechanism; 301. Fixed base; 302. Guide hole; 303. Guide post; 304. End ball; 305. End plate; 306. Threaded tube;

[0039] 4. Vertical pole;

[0040] 5. Sliding sleeve;

[0041] 6. Gas cutting gun;

[0042] 7. Castings;

[0043] 8. First motor;

[0044] 9. Base; 901. Bottom groove; 902. Ball bearing;

[0045] 10. Drive mechanism; 1001. Second motor; 1002. First cylindrical gear; 1003. Circular sleeve; 1004. Second cylindrical gear; 1005. First bevel gear; 1006. Second bevel gear; 1007. Fixing block; 1008. Screw;

[0046] 11. First nut seat;

[0047] 12. First stud;

[0048] 13. First rotating disk;

[0049] 14. Movable rack;

[0050] 15. Clamping assembly; 1501. Positioning bar; 1502. Pressure seat; 1503. Second stud; 1504. Second rotating disk; 1505. Second nut seat. Detailed Implementation

[0051] The present invention will be further illustrated by way of embodiments below, but the present invention is not limited to the scope of the embodiments described herein.

[0052] like Figure 1-6 As shown, an oxy-fuel cutting fixture for removing risers located at an annular location includes a platform 1; it also includes: a support plate 2, the top surface of which is used to support and place castings 7, and a plurality of pusher mechanisms 3 for pushing castings 7 to the center are installed in a circular array along the top edge of the support plate 2; the support plate 2 is disposed on the top surface of the platform 1, and a first motor 8 for driving the support plate 2 to rotate is fixedly installed on the bottom surface of the platform 1; and an oxy-fuel cutting torch 6, which is connected to a horizontal adjustment mechanism, the horizontal adjustment mechanism is connected to a vertical adjustment mechanism, and the bottom of the vertical adjustment mechanism is installed on the side wall of the platform 1.

[0053] like Figure 1-3 As shown, the pushing mechanism 3 includes a fixed seat 301 fixedly installed on the top edge of the support plate 2; the fixed seat 301 is provided with a guide hole 302, and a guide post 303 is connected to the guide hole 302; an end ball 304 is fixedly connected to one end of the guide post 303 facing the casting 7, and an end plate 305 is fixedly connected to the other end of the guide post 303; a threaded tube 306 parallel to the guide post 303 is fixedly connected to the end plate 305, and the threaded tube 306 extends between the top surface of the platform 1 and the bottom surface of the support plate 2.

[0054] It also includes a drive mechanism 10, and several of the pushing mechanisms 3 are connected to the drive mechanism 10. The drive mechanism 10 includes a second motor 1001, a transmission part and several screws 1008. The second motor 1001 is fixedly installed in the support plate 2, and the second motor 1001 is connected to several screws 1008 through the transmission part. The several screws 1008 are respectively threadedly connected to several threaded tubes 306.

[0055] The transmission unit includes a first cylindrical gear 1002, a sleeve 1003, a second cylindrical gear 1004, a first bevel gear 1005, and a second bevel gear 1006. The sleeve 1003 is rotatably sleeved onto the cylindrical surface of the base 9. The first bevel gear 1005 and the second cylindrical gear 1004 are fixedly sleeved on the sleeve 1003. The second cylindrical gear 1004 is meshed with the first cylindrical gear 1002. The first cylindrical gear 1002 is fixedly sleeved with the output shaft of the second motor 1001. The first bevel gear 1005 is meshed with the second bevel gear 1006. The middle part of the second bevel gear 1006 is fixedly connected to the end of the screw 1008.

[0056] Each of the screws 1008 has a fixing block 1007 rotatably mounted at one end near the second bevel gear 1006, and the fixing block 1007 is fixedly connected to the bottom surface of the support plate 2.

[0057] When the annular casting 7 needs to be gas-cut with a riser, the casting 7 is placed directly on the support plate 2, with the end to which the riser needs to be removed located at the top, and then the casting 7 is centered.

[0058] The specific process of centering casting 7 is as follows: the second motor 1001 drives the first cylindrical gear 1002 to rotate. Through the meshing transmission between the first cylindrical gear 1002 and the second cylindrical gear 1004, the sleeve 1003 rotates. The second bevel gear 1006 on the sleeve 1003 rotates together with the sleeve 1003. Through the meshing transmission between the second bevel gear 1006 and several first bevel gears 1005, several screws 1008 rotate synchronously together. The screws 1008 respectively screw into the threaded tubes 306 in several drive mechanisms 10. Guided by the guide post 303 and the guide hole 302, the threaded tube 306, end plate 305, guide post 303 and end ball 304 move together towards the axis of the support disk 2. The end ball 304 pushes the casting 7 to center it.

[0059] In practice, the number of pusher mechanisms 3 can be set to four.

[0060] like Figure 1 , Figure 2 , Figure 5 as well as Figure 6As shown, the vertical adjustment mechanism includes a vertical rod 4 and a sliding sleeve 5; the bottom end of the vertical rod 4 is fixedly connected to the platform 1, and the sliding sleeve 5 is slidably sleeved onto the vertical rod 4.

[0061] The front side of the sliding sleeve 5 is fixedly installed with a first nut seat 11, the first nut seat 11 is threadedly connected with a first stud 12, one end of the first stud 12 is pressed onto the vertical rod 4, and the other end of the first stud 12 is fixedly installed with a first rotating disk 13.

[0062] The lateral adjustment mechanism includes a movable frame 14 and a clamping assembly 15; the movable frame 14 is disposed on the back of the sliding sleeve 5, and one end of the movable frame 14 is fixedly connected to the gas cutting gun 6, and the clamping assembly 15 clamps the movable frame 14.

[0063] The clamping assembly 15 includes two positioning bars 1501 and a pressure seat 1502 fixedly installed; a groove is formed between the two positioning bars 1501, and the pressure seat 1502 is fitted into the groove. The movable frame 14 is located between the sliding sleeve 5 and the pressure seat 1502. A second nut seat 1505 is fixedly installed in the middle of the pressure seat 1502. A second stud 1503 is threadedly connected to the second nut seat 1505. One end of the second stud 1503 is rotatably connected to the back of the sliding sleeve 5, and a second rotating disk 1504 is fixedly installed at the other end of the second stud 1503.

[0064] After the casting 7 is placed centered on the support plate 2, the height and lateral position of the gas cutting gun 6 are adjusted to match the height and diameter of the casting 7.

[0065] When adjusting the height, the first rotating disk 13 is rotated forward to loosen the first stud 12 in the first nut seat 11. The end of the first stud 12 is released from the vertical rod 4, and the clamping and positioning between the sliding sleeve 5 and the vertical rod 4 is released. The sliding sleeve 5 can slide on the vertical rod 4 to adjust the height of the gas cutting gun 6. After adjustment, the first rotating disk 13 is rotated in the opposite direction to tighten the first stud 12 in the first nut seat 11. The end of the first stud 12 presses against the vertical rod 4 to achieve clamping and positioning.

[0066] When making lateral adjustments, such as Figure 6As shown, at this time, the pressure seat 1502 is pressed against the movable frame 14. The top and bottom sides of the movable frame 14 are in contact with the top and bottom bent edges of the pressure seat 1502. By rotating the second rotating disk 1504 in the forward direction, the second stud 1503 and the second nut seat 1505 are screwed together. With the guide provided by the slot for the pressure seat 1502, the pressure seat 1502 moves away from the sliding sleeve 5. The pressure seat 1502 releases the movable frame 14. After being released, the top and bottom sides of the movable frame 14 are still in contact with the top and bottom bent edges of the pressure seat 1502. By keeping the movable frame 14 against the back side of the sliding sleeve 5, the movable frame 14 is moved laterally to adjust the lateral position of the gas cutting gun 6. After adjustment, the position of the gas cutting gun 6 is maintained with one hand, and the second rotating disk 1504 is rotated in the reverse direction to press the pressure seat 1502 against the movable frame 14 to provide positioning.

[0067] After adjusting the height and lateral position as described above, the position of the flame nozzle of the gas cutting gun 6 is moved to the riser size position of the casting 7.

[0068] During subsequent cutting, the gas cutting torch 6 is connected to the oxy-acetylene cylinder through a pipe; the oxy-acetylene cylinder switch is turned on, the gas cutting torch 6 is ignited, the first motor 8 drives the support plate 2 to rotate, and the gas cutting torch 6 performs gas cutting on the riser.

[0069] After the gas cutting is completed, turn off the switch of the oxyacetylene cylinder, then adjust the position of the gas cutting torch 6 so that the gas cutting torch 6 is removed from the top of the casting 7 to avoid obstructing the subsequent removal of the casting 7. Then, drive all the pushing mechanisms 3 through the drive mechanism 10 to move the end ball 304 away from the axis of the support plate 2 until the end ball 304 is against the fixed seat 301; then remove the casting 7.

[0070] The first motor 8 is preferably a low-speed motor with a reducer, which is used to drive the support plate 2 to rotate at a low speed.

[0071] The second motor 1001 is preferably a servo motor.

[0072] like Figure 2-3 As shown, the support plate 2 is disc-shaped, and a base 9 is fixedly installed at the bottom center of the support plate 2. The bottom of the base 9 has multiple bottom grooves 901 arranged in a circular array. Each of the multiple bottom grooves 901 is provided with a ball bearing 902, and the ball bearing 902 is in contact with the top surface of the platform 1. The output shaft end of the first motor 8 is fixedly connected to the middle of the base 9.

[0073] When the first motor 8 drives the support disk 2 to rotate, the ball bearings 902 roll against the top surface of the platform 1, reducing frictional resistance.

[0074] This utility model provides a gas cutting fixture for removing risers located at annular locations. It can automatically cut the risers without the need for manual control of the gas cutting direction (i.e., using the hand to make the gas cutting gun 6 move in a circular motion along the outer circle or inner hole). Due to hand operation errors, shaking, etc., the casting body 7 may be cut or scraped after gas cutting, thereby reducing rework.

[0075] It performs gas cutting by rotating the casting 7; gas cutting of risers can be achieved whether the riser is placed on the outer circle or in the inner hole.

[0076] This utility model is not limited to the above-described embodiments. Any changes in its shape or structure fall within the protection scope of this utility model. The protection scope of this utility model is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of this utility model, but all such changes and modifications fall within the protection scope of this utility model.

Claims

1. A gas cutting fixture for removing risers located at an annular structure, comprising a platform (1); characterized in that, Also includes: The support plate (2) has a top surface for supporting and placing the casting (7), and a number of pushing mechanisms (3) for pushing the casting (7) to the center are installed in a ring array at the top edge of the support plate (2); the support plate (2) is set on the top surface of the platform (1), and a first motor (8) for driving the support plate (2) to rotate is fixedly installed on the bottom surface of the platform (1); Gas cutting gun (6), the gas cutting gun (6) is connected to a horizontal adjustment mechanism, the horizontal adjustment mechanism is connected to a vertical adjustment mechanism, and the bottom of the vertical adjustment mechanism is installed on the side wall of the platform (1).

2. The gas cutting fixture for removing the riser located at the annular position as described in claim 1, characterized in that: The support plate (2) is disc-shaped, and a base (9) is fixedly installed at the bottom center of the support plate (2). The bottom of the base (9) has multiple bottom grooves (901) arranged in a ring array. Each of the multiple bottom grooves (901) is provided with a ball (902), and the ball (902) is in contact with the top surface of the platform (1). The output shaft end of the first motor (8) is fixedly connected to the middle of the base (9).

3. The gas cutting fixture for removing the riser located at the annular position as described in claim 2, characterized in that: The pushing mechanism (3) includes a fixed seat (301) fixedly installed on the top edge of the support plate (2); the fixed seat (301) is provided with a guide hole (302), the guide hole (302) is connected to a guide post (303), one end of the guide post (303) facing the casting (7) is fixedly connected to an end ball (304), the other end of the guide post (303) is fixedly connected to an end plate (305), the end plate (305) is fixedly connected to a threaded tube (306) parallel to the guide post (303), and the threaded tube (306) extends into the space between the top surface of the platform (1) and the bottom surface of the support plate (2).

4. The gas cutting fixture for removing the riser located at the annular position as described in claim 3, characterized in that: It also includes a drive mechanism (10), and several of the pushing mechanisms (3) are connected to the drive mechanism (10). The drive mechanism (10) includes a second motor (1001), a transmission part and several screws (1008). The second motor (1001) is fixedly installed in the support plate (2), and the second motor (1001) is connected to several screws (1008) through the transmission part. Several screws (1008) are respectively threadedly connected to several threaded tubes (306).

5. The gas cutting fixture for removing the riser located at the annular position as described in claim 4, characterized in that: The transmission unit includes a first cylindrical gear (1002), a sleeve (1003), a second cylindrical gear (1004), a first bevel gear (1005), and a second bevel gear (1006). The sleeve (1003) is rotatably sleeved onto the cylindrical surface of the base (9). The first bevel gear (1005) and the second cylindrical gear (1004) are fixedly sleeved on the sleeve (1003). The second cylindrical gear (1004) is meshed with the first cylindrical gear (1002). The first cylindrical gear (1002) is fixedly sleeved with the output shaft of the second motor (1001). The first bevel gear (1005) is meshed with the second bevel gear (1006). The middle part of the second bevel gear (1006) is fixedly connected to the end of the screw (1008).

6. The gas cutting fixture for removing the riser located at the annular position as described in claim 5, characterized in that: Each of the screws (1008) has a fixing block (1007) rotatably mounted on one end near the second bevel gear (1006), and the fixing block (1007) is fixedly connected to the bottom surface of the support plate (2).

7. The gas cutting fixture for removing the riser located at the annular position as described in claim 1, characterized in that: The vertical adjustment mechanism includes a vertical rod (4) and a sliding sleeve (5); the bottom end of the vertical rod (4) is fixedly connected to the platform (1), and the sliding sleeve (5) is slidably sleeved onto the vertical rod (4).

8. The gas cutting fixture for removing the riser located at the annular position as described in claim 7, characterized in that: The front of the sliding sleeve (5) is fixedly installed with a first nut seat (11), the first nut seat (11) is threadedly connected with a first stud (12), one end of the first stud (12) is pressed onto the vertical rod (4), and the other end of the first stud (12) is fixedly installed with a first rotating disk (13).

9. The gas cutting fixture for removing the riser located at the annular position as described in claim 7, characterized in that: The lateral adjustment mechanism includes a movable frame (14) and a clamping assembly (15); the movable frame (14) is located on the back of the sliding sleeve (5), and one end of the movable frame (14) is fixedly connected to the gas cutting gun (6), and the clamping assembly (15) clamps the movable frame (14).

10. The gas cutting fixture for removing the riser located at the annular position as described in claim 9, characterized in that: The clamping assembly (15) includes two positioning bars (1501) and a pressure seat (1502) fixedly installed; a groove is formed between the two positioning bars (1501), and the pressure seat (1502) is fitted into the groove. The movable frame (14) is located between the sliding sleeve (5) and the pressure seat (1502). A second nut seat (1505) is fixedly installed in the middle of the pressure seat (1502). A second stud (1503) is threadedly connected to the second nut seat (1505). One end of the second stud (1503) is rotatably connected to the back of the sliding sleeve (5), and a second rotating disk (1504) is fixedly installed at the other end of the second stud (1503).

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