A device for cutting off a casting head

Abstract

This utility model belongs to the field of casting post-processing technology, and in particular relates to a casting riser removal device. The device includes an indexing drive device, a turntable bearing, a turntable, and a clamping device. The indexing drive device drives the turntable to rotate intermittently at a preset angle. The turntable has several rectangular through holes along its circumference, and the inner wall of the rectangular through holes has a mounting groove. The clamping device includes a support plate, a positioning column, and an arc-shaped positioning plate. The positioning column is inserted into the bottom countersunk hole of the casting to achieve radial positioning, and the arc-shaped positioning plate fits against the arc-shaped surface of the casting to achieve circumferential positioning. A cross rail locking assembly is provided in the dovetail groove, and the casting is quickly and automatically clamped through the first driving inclined surface and the return spring. This device can effectively clamp small pump body castings with irregular shapes for riser and gate removal, solving the problems of low production efficiency, complex clamping operation, and low equipment utilization of traditional single-station removal methods. It realizes multi-process parallel operation, improving production efficiency and removal accuracy.

Description

Technical Field

[0001] This utility model belongs to the field of casting post-processing technology, and in particular relates to a casting riser removal device. Background Technology

[0002] In casting production, riser removal is an essential post-processing step, especially for the production of small pump body castings. Riser and gate are crucial components of the casting process; risers primarily compensate for shrinkage during solidification, while gates serve as channels for molten metal to enter the mold cavity, located at both ends of the pump body casting. After casting is complete, these risers and gates need to be precisely removed to obtain a finished pump body casting that meets the required specifications.

[0003] Traditional riser removal devices for small pump body castings mainly adopt a single-station removal method, meaning that only one pump body casting can be clamped and removed at a time. This removal method cannot achieve continuous processing, resulting in low production efficiency. In single-station mode, it is necessary to wait for one pump body casting to complete all removal processes (including riser removal and gate removal) before the next casting can be clamped. Time-sharing reuse is not possible, equipment utilization is low, and this seriously restricts the batch production efficiency of small pump body castings.

[0004] Secondly, traditional clamping methods are complex and cumbersome, with long operation times, numerous clamping steps, and complicated operations. The clamping time for a single casting accounts for a large proportion of the entire processing cycle, further reducing production efficiency. Utility Model Content

[0005] In view of the technical problems existing in the background art, the present invention provides a casting riser removal device.

[0006] To achieve the above objectives, the technical solution provided by this utility model is as follows: A casting riser removal device includes an indexing drive device. The outer end of the indexing drive device is fixedly connected to a turntable bearing. The inner ring of the turntable bearing is fixedly connected to a turntable. The turntable has a plurality of rectangular through holes along its circumference. The inner wall of each of the plurality of rectangular through holes is provided with a mounting groove. The interior of the mounting groove is provided with a clamping device for clamping the casting. The clamping device includes a support plate that is fixedly connected to the inner wall of the mounting groove by bolts. The support plate is located in the middle of the rectangular through hole. Two tool relief grooves are formed between the support plate and the inner walls on both sides of the rectangular through hole. A positioning post is fixedly connected to the top of the support plate. An arc-shaped positioning plate is fixedly connected to the top of the support plate. A limit plate is fixedly connected to the top of the turntable. The positioning post is inserted into the countersunk hole of the workpiece to achieve radial positioning. The arc-shaped positioning plate abuts against the arc-shaped part of the workpiece to achieve circumferential positioning. The limit plate abuts against the end face of the workpiece to achieve radial limitation.

[0007] Optionally, rectangular grooves and dovetail grooves arranged in a cross pattern are provided on the inner walls of both sides of the rectangular through hole. Arc-shaped parts are provided at the four corners of the intersection area of ​​the rectangular grooves and dovetail grooves. A locking component for locking the casting is slidably connected in the dovetail groove.

[0008] Optionally, the indexing drive device drives the turntable to rotate intermittently at a preset angle.

[0009] Optionally, the locking assembly includes a cross rail that is slidably connected to the rectangular groove and the dovetail groove. The two sides of the cross rail are provided with tenons that are slidably connected to the inner wall of the dovetail groove. The top of the cross rail is provided with a locking head, and the outer end of the locking head is provided with a first driving slope.

[0010] Optionally, the bottom end of the cross rail is provided with an unlocking head, the outer end of the unlocking head is provided with a second driving slope, and the inner wall of the arc-shaped part is slidably connected with a return spring. The end of the return spring near the cross rail abuts against the cross rail, and the end of the return spring away from the cross rail abuts against the bottom of the rectangular groove.

[0011] Optionally, the outer end of the indexing drive device is fixedly connected to a discharge cylinder, the outer end of the discharge cylinder is fixedly connected to a mounting plate, the outer end of the mounting plate is fixedly connected to a drive block and a discharge rod, and a through hole opposite to the discharge rod is opened on the support plate.

[0012] Optionally, the top of the turntable is provided with a gate cutting device, which includes a first mounting bracket fixedly connected to the outer end of the indexing drive device. The outer end of the first mounting bracket is fixedly connected to a first feed assembly, and the outer end of the first feed assembly is provided with a double saw blade assembly.

[0013] Optionally, the outer end of the turntable bearing is provided with a riser cutting device. The riser cutting device includes a second mounting bracket fixedly connected to the outer end of the indexing drive device. The outer end of the second mounting bracket is fixedly connected to a second feed assembly, and the outer end of the second feed assembly is fixedly connected to a single saw blade assembly.

[0014] This utility model has the following advantages and beneficial effects: In this invention, by setting up a vertical turntable and a multi-station indexing drive device, continuous operation and time-sharing reuse of riser removal for castings are realized; through the design of rectangular through holes and mounting grooves, the existing shape features of the casting are fully utilized for rapid positioning and clamping; by inserting positioning pins into the bottom countersunk holes of the casting and fitting the arc-shaped positioning plate with the arc-shaped surface of the casting, reliable radial and circumferential constraints are provided at the part of the casting with the best rigidity; by setting up a cross rail locking assembly, in conjunction with the first driving inclined surface and the return spring, the technical characteristics of casting pressing and spring return are utilized to provide a fast and automatic clamping function. This method can effectively clamp small pump body castings for precise removal of risers and gates and maintain the stability of the cutting process.

[0015] Compared to the traditional single-station cutting method, it avoids the production efficiency problems caused by low equipment utilization and complex clamping operations. It realizes parallel operation of clamping, gate cutting, riser cutting, unloading and other processes, which greatly improves production efficiency. The design of cutting both gates at the same time with a double saw blade assembly and cutting the top riser with a single saw blade assembly ensures the accuracy of the cutting position and the quality of the cutting surface, meeting the technical requirements for mass production of small pump body castings. Attached Figure Description

[0016] Figure 1 This is an overall structural diagram of the casting riser removal device of this utility model; Figure 2 This is a partial view of the casting riser removal device of this utility model. Figure 1 ; Figure 3 This is a partial view of the casting riser removal device of this utility model. Figure 2 ; Figure 4 This is a front view of the casting riser removal device of this utility model; Figure 5 This utility model Figure 4 A cross-sectional view along the AA direction; Figure 6 The clamping device structure of this utility model Figure 1 ; Figure 7 The clamping device structure of this utility model Figure 2 ; Figure 8 This is a structural diagram of the cross rail of this utility model; Figure 9 This is a structural diagram of the gate cutting device of this utility model; Figure 10 This is a structural diagram of the riser cutting device of this utility model.

[0017] Reference numerals: 1. Indexing drive device; 2. Turntable bearing; 3. Turntable; 4. Rectangular through hole; 5. Mounting slot; 6. Support plate; 7. Tool relief groove; 8. Positioning pin; 9. Arc-shaped positioning plate; 10. Limiting plate; 11. Rectangular groove; 12. Dovetail groove; 13. Arc-shaped part; 14. Cross rail; 1401. Tenon head; 1402. Locking head; 1403. First driving ramp; 1404. Unlocking head; 1405. Second driving ramp; 1 5. Return spring; 16. Unloading cylinder; 17. Mounting plate; 18. Drive block; 19. Unloading rod; 20. Through hole; 21. Sprue cutting device; 2101. First mounting frame; 2102. First feed assembly; 2103. Double saw blade assembly; 22. Riser cutting device; 2201. Second mounting frame; 2202. Second feed assembly; 2203. Single saw blade assembly; 23. Casting; 2301. Riser; 2302. Sprue. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0019] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0020] Example like Figures 1-10 As shown, a casting riser removal device includes an indexing drive device 1, a turntable bearing 2, and a clamping device for clamping the casting to be removed.

[0021] like Figure 2 and Figure 6 As shown, the casting 23 to be cut is a small mechanical part casting. The casting 23 includes a casting body, a riser 2301 and gates 2302 on both sides. The riser 2301 is usually located at the thickest part of the casting 23 for feeding and solidification shrinkage. The gates 2302 are located at both ends of the casting 23 and are channels for molten metal to enter the mold cavity. The cutting device designed in this utility model is used to automatically cut off the riser 2301 and gate 2302 of the casting 23.

[0022] like Figures 1-5 As shown, the indexing drive device 1 adopts an integrated design, including components such as a frame, servo motor, and precision reducer. The frame provides a supporting foundation for the entire device. The outer end of the indexing drive device 1 is fixedly connected to a turntable bearing 2, which is a large slewing bearing capable of bearing the weight of the turntable 3 and the workpiece, as well as the cutting reaction force.

[0023] The inner ring of the turntable bearing 2 is fixedly connected to the turntable 3. The turntable 3 is set vertically to make full use of the workshop space height. The turntable 3 has several rectangular through holes 4 along the circumference. In this embodiment, four rectangular through holes 4 are set and distributed at equal intervals along the circumference of the turntable 3. One station is set every 90°. The inner wall of each rectangular through hole 4 is provided with a mounting groove 5. The inside of the mounting groove 5 is provided with a clamping device for clamping the casting 23.

[0024] In this invention, by setting up a vertical turntable 3 and multiple workstations, the casting 23 is positioned and clamped using its shape, which can conveniently and quickly achieve precise clamping of the casting 23. Compared with the traditional single-station cutting method, it can achieve multi-station parallel operation and improve cutting efficiency.

[0025] The clamping device includes a support plate 6 that is bolted to the inner wall of the mounting groove 5. The support plate 6 is located in the middle of the rectangular through hole 4. Two blade relief grooves 7 are formed between the support plate 6 and the inner walls on both sides of the rectangular through hole 4 to provide blade relief space for the cutting saw blade. The top of the support plate 6 is fixedly connected to a positioning post 8 and an arc-shaped positioning plate 9. The positioning post 8 is inserted into the countersunk hole of the casting for radial positioning of the casting 23. The arc-shaped positioning plate 9 is used to abut against the arc-shaped part of the casting 23 to complete circumferential positioning, ensuring that the position of the casting 23 is stable during the cutting process. The top of the turntable 3 is fixedly connected to a limit plate 10, which is used to bear the cutting reaction force generated during the cutting process and ensure the reliability of the clamping.

[0026] The inner walls on both sides of the rectangular through hole 4 are provided with rectangular grooves 11 and dovetail grooves 12 arranged in a cross shape. The four corners of the intersection area of ​​the rectangular grooves 11 and dovetail grooves 12 are provided with arc-shaped parts 13. A locking component for locking the casting 23 is slidably connected in the dovetail groove 12. The cross groove design provides flexible sliding space for the locking component.

[0027] Furthermore, the indexing drive device 1 drives the turntable 3 to rotate intermittently at a preset angle. In this embodiment, the turntable 3 stops after rotating 90° each time to achieve precise indexing and positioning. When the turntable 3 rotates to the 12 o'clock position, the gate 2302 is cut, and when the turntable 3 rotates to the 3 o'clock position, the riser 2301 is cut. This intermittent rotation method ensures that each station can perform clamping, cutting, unloading and other operations under static conditions, thus ensuring processing accuracy and operational safety.

[0028] like Figures 6-8 As shown, the locking assembly includes a cross rail 14 that is slidably connected to the rectangular groove 11 and the dovetail groove 12. The two sides of the cross rail 14 are provided with tenons 1401 that are slidably connected to the inner wall of the dovetail groove 12. The tenons 1401 have a trapezoidal cross section and are precisely matched with the dovetail groove 12 to prevent the cross rail 14 from coming out. The top of the cross rail 14 is provided with a locking head 1402, and the outer end of the locking head 1402 is provided with a first driving inclined surface 1403.

[0029] Furthermore, the bottom end of the cross rail 14 is provided with an unlocking head 1404, the outer end of the unlocking head 1404 is provided with a second driving inclined surface 1405, and the inner wall of the arc-shaped part 13 is slidably connected with a reset spring 15. The arc-shaped part 13 facilitates the installation of the reset spring 15. The part of the reset spring 15 near the cross rail 14 abuts against the cross rail 14, and the part of the reset spring 15 away from the cross rail 14 abuts against the bottom of the rectangular groove 11.

[0030] like Figures 1-3 and Figures 6-8 As shown, this design facilitates rapid clamping of casting 23. During clamping, firstly, the turntable 3 is rotated to the clamping position (located at the 9 o'clock position of the turntable 3) and stopped. Then, casting 23 is placed on support plate 6, and positioning pin 8 is inserted into the countersunk hole at the bottom of casting 23 for positioning. The arc-shaped surface of casting 23 abuts against arc-shaped positioning plate 9, and the flat end of casting 23 abuts against limiting plate 10. During clamping, the bottom end of casting 23 first contacts the first driving inclined surface 1403 on both sides of casting 23, pushing... The first driving inclined plane 1403 drives the cross rail 14 and the locking head 1402 to slide along the inner wall of the rectangular groove 11 and the dovetail groove 12, compressing the return spring 15 until the bottom surface of the casting 23 abuts against the support plate 6. The return spring 15 pushes the cross rail 14 and the locking head 1402 back to their original positions, and the locking head 1402 engages with the bottom plate of the casting 23 to complete the clamping. After the casting 23 is clamped, the turntable 3 can continue to rotate to the cutting station (12 o'clock position of the turntable 3) to cut the gate 2302.

[0031] like Figures 6-8 As shown, further, the outer end of the indexing drive device 1 is fixedly connected to the unloading cylinder 16, the outer end of the unloading cylinder 16 is fixedly connected to the mounting plate 17, the outer end of the mounting plate 17 is fixedly connected to the drive block 18 and the unloading rod 19, and the support plate 6 is provided with a through hole 20 opposite to the unloading rod 19.

[0032] After the riser 2301 and gate 2302 of the casting 23 are removed, the turntable 3 rotates to the unloading position (6 o'clock position of the turntable 3). Then, the unloading cylinder 16 drives the mounting plate 17, and the mounting plate 17 drives the drive block 18 and the unloading rod 19 to move synchronously. The drive block 18 contacts the second drive inclined surface 1405 on the unlocking head 1404, causing the unlocking heads 1404 on both sides to open. The unlocking head 1404 drives the cross rail 14 and the locking head 1402 to slide together along the inner wall of the rectangular groove 11 and the dovetail groove 12. The cross rail 14 compresses the return spring 15, and at the same time, the locking head 1402 disengages from the bottom plate of the casting 23. At this time, the unloading rod 19 also enters the through hole 20 on the support plate 6. The unloading cylinder 16 continues to operate until the unloading rod 19 pushes the casting 23 out, completing the automatic unloading.

[0033] like Figures 1-3 and Figure 9 As shown, the top of the turntable 3 is further provided with a gate cutting device 21. The gate cutting device 21 includes a first mounting bracket 2101 fixedly connected to the outer end of the indexing drive device 1. The outer end of the first mounting bracket 2101 is fixedly connected to a first feed assembly 2102. The outer end of the first feed assembly 2102 is provided with a double saw blade assembly 2103. The double saw blade assembly 2103 includes two symmetrically arranged saw blades, which correspond to two cutting grooves 7 respectively. It can simultaneously cut off the gates 2302 on both sides of the casting 23. When the turntable 3 rotates, the first feed assembly 2102 will drive the double saw blade assembly 2103 to move to the initial position to avoid positional interference with the turntable 3. When it is necessary to cut the gate 2302, the first feed assembly 2102 will drive the double saw blade assembly 2103 to feed precisely to cut, ensuring accurate cutting position.

[0034] like Figures 1-3 and Figure 10 As shown, the riser cutting device 22 is further fixedly connected to the indexing drive device 1. The riser cutting device 22 includes a second mounting bracket 2201, a second feed assembly 2202, and a single saw blade assembly 2203. The single saw blade assembly 2203 is used to cut off the riser 2301 on the top of the casting 23. Since the riser 2301 is usually thick, it requires a large cutting force. The second feed assembly 2202 provides stable feed control. When the turntable 3 rotates, the second feed assembly 2202 will drive the single saw blade assembly 2203 to move to the initial position to avoid positional interference with the turntable 3. When it is necessary to cut the riser 2301, the second feed assembly 2202 will drive the single saw blade assembly 2203 to feed precisely for cutting.

[0035] like Figures 1-10 As shown, the overall working process of this utility model casting riser removal device is as follows: Clamping stage: The indexing drive device 1 drives the turntable 3 to rotate to the clamping position (9 o'clock direction) and stop. The operator places the casting 23 to be processed on the support plate 6. The positioning pin 8 is inserted into the bottom countersunk hole of the casting for radial positioning. The arc-shaped positioning plate 9 fits against the arc surface of the casting to achieve circumferential positioning. During the descent of the casting, its bottom end pushes the first drive inclined surface 1403, which drives the cross rail 14 to slide and compress the return spring 15. When the casting is fully in place, the return spring 15 rebounds, and the locking head 1402 engages with the bottom plate of the casting to complete the clamping.

[0036] Gate cutting stage: Turntable 3 rotates 90° to the gate cutting station (12 o'clock direction). The first feed component 2102 drives the double saw blade component 2103 to simultaneously cut off the gates 2302 on both sides of the casting 23. The two saw blades work in the two cutter grooves 7 respectively to achieve efficient double-sided synchronous cutting.

[0037] Riser cutting stage: Turntable 3 continues to rotate 90° to the riser cutting position (3 o'clock direction), and the second feed assembly 2202 drives the single saw blade assembly 2203 to cut off the riser 2301 on the top of the casting.

[0038] Unloading stage: Turntable 3 rotates to the unloading position (6 o'clock direction), unloading cylinder 16 drives mounting plate 17, which drives drive block 18 to push the second drive inclined surface 1405 on unlocking head 1404, so that locking head 1402 is separated from casting. At the same time, unloading rod 19 pushes out the completed casting through through hole 20 on support plate 6, realizing automatic unloading.

[0039] Cyclic operation: Turntable 3 continues to rotate, and each station operates in parallel, forming a continuous cycle of clamping, gate cutting, riser cutting and unloading, which greatly improves production efficiency.

[0040] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A casting riser removal device, comprising an indexing drive device (1), wherein a turntable bearing (2) is fixedly connected to the outer end of the indexing drive device (1), characterized in that, The inner ring of the turntable bearing (2) is fixedly connected to a turntable (3). The turntable (3) has several rectangular through holes (4) along the circumference. The inner walls of the several rectangular through holes (4) are provided with mounting grooves (5). The interior of the mounting grooves (5) is provided with clamping devices for clamping castings. The clamping device includes a support plate (6) that is fixedly connected to the inner wall of the mounting groove (5) by bolts. The support plate (6) is located in the middle of the rectangular through hole (4). Two tool relief grooves (7) are formed between the support plate (6) and the inner walls on both sides of the rectangular through hole (4). A positioning post (8) is fixedly connected to the top of the support plate (6). An arc-shaped positioning plate (9) is fixedly connected to the top of the support plate (6). A limit plate (10) is fixedly connected to the top of the turntable (3). The positioning post (8) is inserted into the countersunk hole of the workpiece to achieve radial positioning. The arc-shaped positioning plate (9) abuts against the arc-shaped part of the workpiece to achieve circumferential positioning. The limit plate (10) abuts against the end face of the workpiece to achieve radial limitation.

2. The casting riser removal device according to claim 1, characterized in that: The inner walls of both sides of the rectangular through hole (4) are provided with rectangular grooves (11) and dovetail grooves (12) arranged in a cross shape. The four corners of the intersection area of ​​the rectangular grooves (11) and dovetail grooves (12) are provided with arc-shaped parts (13). A locking component for locking the casting is slidably connected in the dovetail groove (12).

3. The casting riser removal device according to claim 1, characterized in that: The indexing drive device (1) drives the turntable (3) to rotate intermittently at a preset angle.

4. A casting riser removal device according to claim 2, characterized in that: The locking assembly includes a cross rail (14) that is slidably connected to a rectangular groove (11) and a dovetail groove (12). The cross rail (14) has tenons (1401) on both sides that are slidably connected to the inner wall of the dovetail groove (12). The top of the cross rail (14) has a locking head (1402). The outer end of the locking head (1402) has a first driving slope (1403).

5. A device for cutting off a riser of a casting according to claim 4, characterized in that: The bottom end of the cross rail (14) is provided with an unlocking head (1404), and the outer end of the unlocking head (1404) is provided with a second driving inclined surface (1405). The inner wall of the arc-shaped part (13) is slidably connected with a reset spring (15). The end of the reset spring (15) close to the cross rail (14) abuts against the cross rail (14), and the end of the reset spring (15) away from the cross rail (14) abuts against the bottom of the rectangular groove (11).

6. A device for cutting off a riser of a casting according to claim 1, characterized in that: The indexing drive device (1) is fixedly connected to an unloading cylinder (16) at its outer end. The unloading cylinder (16) is fixedly connected to an mounting plate (17) at its outer end. The mounting plate (17) is fixedly connected to a drive block (18) and an unloading rod (19) at its outer end. The support plate (6) has a through hole (20) opposite to the unloading rod (19).

7. A casting riser removal device according to claim 1, characterized in that: The top of the turntable (3) is provided with a gate cutting device (21). The gate cutting device (21) includes a first mounting bracket (2101) fixedly connected to the outer end of the indexing drive device (1). The outer end of the first mounting bracket (2101) is fixedly connected to a first feed assembly (2102). The outer end of the first feed assembly (2102) is provided with a double saw blade assembly (2103).

8. A device for cutting off a riser of a casting according to claim 1, characterized in that: The outer end of the turntable bearing (2) is provided with a riser cutting device (22). The riser cutting device (22) includes a second mounting bracket (2201) fixedly connected to the outer end of the indexing drive device (1). The outer end of the second mounting bracket (2201) is fixedly connected to a second feed assembly (2202). The outer end of the second feed assembly (2202) is fixedly connected to a single saw blade assembly (2203).

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