A machine tool for machining a casting blank

Abstract

The application discloses a machining tool for casting blanks, and relates to the technical field of machining, comprising a machine body, a cutter head, a feeding mechanism and a fixing mechanism, wherein the feeding mechanism comprises a mounting seat and a bracket, a linear driving element is arranged in the mounting seat, protective telescopic covers are arranged at both ends of the outer part of the mounting seat, and the ends of the two protective telescopic covers close to each other are connected through a connecting cover; compared with the current casting blank machining tool, the application is provided with protective telescopic covers and a circulating cleaning module, the protective telescopic covers are composed of a plurality of protective units with movable connecting parts, when the protective telescopic covers are contracted, the ends of the plurality of protective units close to the end face of the bracket are flush with each other, thereby fundamentally avoiding the problem that the traditional piano cover is prone to clamping and trapping chips at the corner, and through the circulating cleaning module, the surface of the connecting cover can be periodically and bidirectionally scraped synchronously when the bracket is in linear motion, so that the excessive accumulation of the chips on the surface of the connecting cover is prevented.

Description

Technical Field

[0001] This invention relates to the field of machining technology, specifically a machine tool for machining casting blanks. Background Technology

[0002] During the casting process, due to the shrinkage rate of the metal and the process tolerance of the sand mold itself, the casting blanks (such as valve bodies and pump casings) often need to be machined before they can be used. At present, for the multi-face machining of such large castings, the industry generally adopts machine tools equipped with multiple displacement degrees, so that the machine tool spindle cutter can flexibly approach each surface to be machined on the casting blank.

[0003] However, under actual heavy cutting conditions, a large amount of oxide scale will fall off the surface of the casting blank, and as the cutting progresses, a large number of sharp and curled metal chips will be generated inside the machine tool. These chips will not only invade the displacement system of the machining tool, but also accumulate on the worktable of the machining tool. At present, in order to prevent such contaminants from entering the displacement system of the machining tool, a bellows-type protective cover composed of multiple overlapping plates is usually installed outside the displacement system. However, when such protective covers are used frequently, chip trapping and chip clamping are very likely to occur. These chips can easily be carried into the displacement system with the movement of the protective cover, thereby affecting the positioning accuracy of the displacement system. Summary of the Invention

[0004] The purpose of this invention is to provide a machine tool for processing casting blanks, so as to solve the problem in the prior art that debris is easily trapped in the shrinkage area of ​​the protective cover.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a machine tool for processing casting blanks, comprising a machine body, a cutter head, a feed mechanism, and a fixing mechanism. The cutter head is used to perform cutting actions, the feed mechanism is used to drive the casting to perform linear or rotary displacement, and the fixing mechanism is located at the output end of the feed mechanism for clamping and fixing the casting blank. The feed mechanism includes a mounting base and a bracket. A linear drive component is provided inside the mounting base (in this embodiment, the linear drive component is preferably a combination of a ball screw and a servo motor, or a linear motor). Protective telescopic covers are provided at both ends of the mounting base, and the ends of the two protective telescopic covers that are close to each other are connected by a connecting cover. The linear drive is kept in a sealed environment by the cooperation of the connecting cover and two protective telescopic covers to ensure the transmission life of the linear drive in a high-debris environment. The bracket is connected to the working end of the linear drive through the connecting cover. A rotary drive is provided on the outside of the bracket. A turntable and two circulating cleaning modules are provided inside the bracket. One end of the turntable is connected to the fixing mechanism, and the other end of the turntable is connected to the rotary drive through gear assembly two. The two circulating cleaning modules are arranged opposite to each other at both ends inside the bracket. Each circulating cleaning module cooperates with a protective telescopic cover. The rotary drive is connected to the two circulating cleaning modules through gear assembly one and reversing assembly.

[0006] Furthermore, the protective telescopic cover includes several protective units, which are arranged sequentially along the moving direction of the bracket, and a movable connecting part is provided between two adjacent protective units; When two adjacent protective units are fully retracted, the end faces of the two adjacent protective units near the bracket are flush with each other.

[0007] When the operator needs to control the rotation of the casting, the rotary drive can be activated. The rotary drive drives the gear assembly and the turntable, thereby rotating the fixing mechanism and the casting to the designated position. When the operator controls the bracket to move horizontally, one of the protective telescopic covers will retract, and the other will extend. In the retracted state, adjacent protective units inside the protective telescopic cover will sequentially approach and push against each other, causing accumulated debris and coolant above the protective units to be pushed onto the connecting cover. At this point, the operator can activate the circulating cleaning module to periodically scrape the top surface of the connecting cover, pushing the accumulated debris and coolant towards the outside of the machine tool or the chip removal channel. This effectively prevents debris and coolant from accumulating at the end of the protective telescopic cover near the bracket. This invention utilizes the flush end face characteristic of the protective telescopic cover in the retracted state, effectively avoiding the problems of chip trapping and accumulating in traditional bellows-style protective covers. Furthermore, the second gear assembly is connected to the rotary drive via a clutch-type coupling. This coupling allows the operator to freely open and close the cyclic cleaning module without interfering with the casting's position. Specifically, when controlling the casting's rotation, the operator uses the clutch-type coupling to fix the second gear assembly to the rotary drive, facilitating the transmission of power from the rotary drive to the turntable and the fixing mechanism. Once the casting reaches the target position, the connection between the second gear assembly and the rotary drive is disconnected via the clutch-type coupling to prevent the casting's position from changing while the rotary drive is operating the cyclic cleaning module. Through this technical solution, the present invention utilizes a single rotary drive to achieve time-sharing drive, enabling the cyclic cleaning module to clean the connecting cover while adjusting the casting's position.

[0008] Furthermore, the circulating cleaning module includes a mounting frame, inside which a movable seat is provided. A through groove is provided at one end of the mounting frame near the connecting cover. Both ends of the through groove are provided with sealing covers. The working end of the movable seat is located in the through groove and connected to the two sealing covers. A cleaner is provided on the side of the working end of the movable seat near the connecting cover.

[0009] Furthermore, the reversing assembly includes valves and a hydraulic unit, the rotary drive unit drives the hydraulic unit through a gear assembly, and both ends of the mounting bracket are connected to the hydraulic unit through valves.

[0010] When the cyclic cleaning module needs to operate, the operator can activate the rotary drive (gear assembly two is disconnected from the rotary drive). The rotary drive, acting as the power source for the hydraulic unit, intermittently supplies hydraulic oil to both ends of the mounting bracket. Specifically, when the hydraulic unit supplies hydraulic oil to one end of the mounting bracket, the hydraulic oil pushes the movable seat to slide towards the other end. The cleaner connected to the working end of the movable seat then performs a horizontal scraping motion along the top surface of the connecting cover. Subsequently, the hydraulic unit switches the oil supply direction via a valve, sending hydraulic oil to the other end of the mounting bracket, pushing the movable seat to reset in the reverse direction. The cleaner then performs a reverse scraping motion, repeating this process to form a periodic bidirectional cleaning action. Furthermore, the fixing mechanism includes a first workbench, a second workbench, and a tooling fixture. The first workbench, the second workbench, and the tooling fixture are sequentially arranged on the bracket. The second workbench is provided with a sliding groove, and the tooling fixture is provided with a slider at one end near the second workbench. The slider cooperates with the sliding groove. During operation, the operator places the casting on the tooling fixture, and then the operator can push the tooling fixture to move on the second workbench so that the casting reaches the preset processing position.

[0011] Furthermore, both ends of the slider are provided with chamfered edges, and both cavities are connected to an external air pump. After the work is completed, the operator can drive the tooling fixture to move on the second workbench. When the tooling fixture moves, the slider will move synchronously in the slide groove, forcibly pushing and removing the curled iron filings or oil stains accumulated in the slide groove forward or backward. Finally, both ends of the second workbench are provided with cavities, and the end of each cavity near the slide groove is provided with a through hole. A sealing assembly is provided in the through hole. When the machine tool is cutting the casting, the sealing assembly... The part seals the through hole. When the cutting work is finished and the slider moves the debris in the groove to the end of the groove, the operator can start the external air pump. At this time, high-pressure air will be sprayed out through the cavity and through hole and perform high-pressure sweeping on the end of the groove. This blows the remaining debris and coolant directly out of the groove, preventing small debris from raising the slider and ensuring subsequent positioning accuracy. Compared with the current method of directly cleaning the groove with an air gun, this invention can effectively avoid the risk of blowing the debris in the groove back into the depth of the groove, causing the debris to become tighter and deeper as it is blown.

[0012] Furthermore, the sealing assembly includes a sealing block, and a fixing frame is provided inside the cavity. The fixing frame is connected to the sealing block via a connecting rod and to the cavity via a compression spring. When an external air pump delivers high-pressure air into the cavity, the air inside the cavity increases, causing the sealing block to rise and thus opening the through hole. At this time, the high-pressure air will be ejected through the cavity and the through hole, and discharged to the outside along the chamber formed by the bottom of the tooling fixture and the slide groove. During the discharge process, the high-pressure air can clean away the debris and coolant remaining in the slide groove.

[0013] Furthermore, each protective unit is equipped with a sealing gasket at one end near the bracket. When the protective telescopic cover retracts and expands, the sealing gasket flexibly seals the mechanical gap between adjacent protective units. This effectively prevents the penetration of highly atomized cutting fluid. On the other hand, when the protective telescopic cover retracts, the upper protective unit can effectively clean the surface of the lower protective unit. The surface of the protective unit is coated with an anti-corrosion coating, which can isolate the acid and alkali substances in the cutting fluid from corroding the protective unit, thereby significantly extending the service life of the feed mechanism and the protective telescopic cover.

[0014] Furthermore, the reversing assembly includes a first liquid storage tank, a disc, a second liquid storage tank, and a drive shaft. The two ends of the mounting bracket are respectively connected to the first liquid storage tank and the second liquid storage tank. One end of the drive shaft is connected to a rotary drive component through a gear assembly, and the other end of the drive shaft is connected to the disc. A bracket is provided on the disc. Pistons are provided inside both the first and second liquid storage tanks. The bracket is connected to the pistons inside the first and second liquid storage tanks through a push rod.

[0015] When the rotary drive is activated and drives the drive shaft and disk to rotate continuously via gear assembly one, the bracket will rotate around the center of the disk. The rotating bracket, through push rods, alternately pulls and pushes the pistons inside reservoir one and reservoir two. At this time, the pistons in reservoir one and reservoir two will perform synchronous but opposite linear reciprocating suction and pushing movements along their own axes. Both reservoir one and reservoir two are filled with a transmission medium (such as hydraulic oil), and the ends of reservoir one and reservoir two are connected to the two side chambers inside the mounting bracket via pipes. When the pistons in reservoir one and reservoir two periodically move in opposite directions, Under the action of the transmission medium, the movable seat inside the mounting frame will perform high-frequency reciprocating linear motion in the horizontal direction, thereby driving the cleaner to continuously scrape and clean the connecting cover. Through the above technical solution, the present invention can be used in harsh environments with high dust and high cutting fluid splashes when processing castings, without considering the problem of hydraulic pumps and valves failing to switch due to oil impurities or dust. At the same time, the cleaner can achieve reciprocating scraping by the drive component only needing to rotate continuously in one direction, effectively avoiding heat loss and backlash accumulation caused by frequent start-stop and switching of the rotary drive component, and significantly extending the service life of the rotary drive component.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: Compared with the current casting blank processing machine tool, the present invention is equipped with a protective telescopic cover and a circulating cleaning module. The protective telescopic cover is composed of several protective units with movable connecting parts. When the protective telescopic cover retracts, the end faces of several protective units near the bracket are flush with each other, thus fundamentally avoiding the problem of traditional bellows covers easily trapping and accumulating chips at the corners, leading to jamming. The circulating cleaning module can simultaneously perform periodic bidirectional scraping on the surface of the connecting cover while the bracket is making linear motion, preventing excessive accumulation of chips on the surface of the connecting cover, avoiding jamming of the protective telescopic cover, and ensuring the displacement accuracy of the bracket. In addition, the present invention sets a clutch-type coupling between the gear assembly and the rotary drive component. The shaft assembly enables a single rotary drive component to simultaneously drive the cyclic cleaning module to clean the connecting cover without affecting the adjustment of the casting blank position. In addition, the invention also includes a slider with a shovel-shaped bevel within the fixing mechanism. Through the cooperation of the slider and the sealing component, the phenomenon of debris invading the deep groove in the reverse direction when the traditional air gun blows the worktable is effectively avoided. Finally, in embodiment two, the invention also provides a reversing component. This reversing component can not only operate stably in a high-pressure dust environment, but also allows the rotary drive component to drive the cleaner to perform reciprocating scraping without dead zones by maintaining continuous rotation in one direction. This completely avoids the heat loss and reverse clearance accumulation problems caused by frequent start-stop and reversal of the rotary drive component in the traditional method. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the appearance of the present invention; Figure 2 This is a schematic diagram of the feeding mechanism and fixing mechanism of the present invention; Figure 3 This is a schematic diagram of the feeding mechanism structure of the present invention; Figure 4 This is a schematic diagram of the internal structure of the bracket of the present invention; Figure 5 This is a schematic diagram of the cyclic cleaning module structure of the present invention; Figure 6 This is a schematic diagram of the commutation component structure in Embodiment 2 of the present invention; Figure 7 This is a schematic diagram showing the location of the sealing assembly of the present invention; Figure 8 This is a schematic diagram of the slider structure of the present invention.

[0018] In the diagram: 1. Machine body; 2. Cutter head; 3. Feed mechanism; 31. Mounting base; 32. Bracket; 321. Turntable; 322. Gear assembly one; 323. Clutch coupling; 324. Gear assembly two; 325. Mounting bracket; 3251. Movable seat; 3252. Sealing cover; 3253. Cleaner; 326. Liquid storage tank one; 327. Disc; 3271. Bracket; 3272. Push rod; 328. Liquid storage tank two; 329. Drive shaft; 33. Rotary drive component; 34. Protective telescopic cover; 35. Linear drive component; 36. Connecting cover; 4. Fixing mechanism; 41. Worktable one; 42. Worktable two; 421. Slide; 422. Fixture; 423. Sealing block; 424. Cavity; 43. Tooling fixture; 431. Slider. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] like Figures 1-8As shown in Embodiment 1 of the present invention, a machine tool for processing casting blanks includes a machine body 1, a cutter head 2, a feed mechanism 3, and a fixing mechanism 4. The cutter head 2 is used to perform cutting actions, the feed mechanism 3 is used to drive the casting to perform linear or rotary displacement, and the fixing mechanism 4 is located at the output end of the feed mechanism 3 for clamping and fixing the casting blank. The feed mechanism 3 includes a mounting base 31 and a bracket 32. A linear drive component 35 is provided inside the mounting base 31 (in this embodiment, the linear drive component 35 is preferably a combination of a ball screw and a servo motor, or a linear motor). Protective telescopic covers 34 are provided at both ends of the mounting base 31. The two protective telescopic covers 34 are connected at their close ends by a connecting cover 36. The connecting cover 36 and the two protective telescopic covers 34 are connected by a connecting cover 36. The protective telescopic cover 34 ensures that the linear drive 35 is in a sealed environment, thus guaranteeing its transmission life in a high-debris environment. The bracket 32 ​​is connected to the working end of the linear drive 35 via the connecting cover 36. A rotary drive 33 is provided on the outside of the bracket 32. A turntable 321 and two circulating cleaning modules are provided inside the bracket 32. One end of the turntable 321 is connected to the fixing mechanism 4, and the other end of the turntable 321 is connected to the rotary drive 33 via the gear assembly 324. The two circulating cleaning modules are arranged opposite each other at both ends inside the bracket 32. Each circulating cleaning module is equipped with a protective telescopic cover 34. The rotary drive 33 is connected to the two circulating cleaning modules via the gear assembly 322 and the reversing assembly.

[0021] like Figures 2-3 As shown, the protective telescopic cover 34 includes several protective units, which are arranged sequentially along the moving direction of the bracket 32, and a movable connecting part is provided between two adjacent protective units. When two adjacent protective units are fully retracted, the end faces of the two adjacent protective units near the bracket 32 ​​are flush with each other.

[0022] When the operator needs to control the rotation of the casting, the rotary drive 33 can be activated. The rotary drive 33 drives the gear assembly 324 and the turntable 321 to work, thereby driving the fixing mechanism 4 and the casting to rotate to the designated position. When the operator controls the bracket 32 ​​to make horizontal linear movement, one of the protective telescopic covers 34 will retract and the other protective telescopic cover 34 will extend. At this time, the adjacent protective units inside the retracted protective telescopic cover 34 will approach and push against each other in sequence, thereby pushing the debris and coolant accumulated above the protective units onto the connecting cover 36. At this time, the operator can activate the circulation cleaning module to periodically scrape the top surface of the connecting cover 36, pushing the debris and coolant accumulated on the connecting cover 36 to the outside of the machine tool or the chip removal channel, thereby effectively preventing the debris and coolant from accumulating at the end of the protective telescopic cover 34 near the bracket 32. This invention utilizes the flush end face characteristic of the protective telescopic cover 34 in the retracted state to effectively avoid the problem of chip trapping and chip accumulating in traditional bellows protective covers.

[0023] like Figure 4 As shown, gear assembly 324 and rotary drive 33 are connected by a clutch coupling 323. The clutch coupling 323 allows the operator to freely open the cyclic cleaning module without interfering with the casting's position. Specifically, when the operator controls the casting's rotation, the clutch coupling 323 fixes gear assembly 324 and rotary drive 33 together, facilitating the rotary drive 33's power transmission to the turntable 321 and the fixing mechanism 4. When the casting reaches the target position, the clutch coupling 323 disconnects gear assembly 324 from the rotary drive 33 to prevent the casting's position from changing while the rotary drive 33 is driving the cyclic cleaning module. Through this technical solution, the present invention utilizes a single rotary drive 33 to achieve time-sharing drive, allowing the cyclic cleaning module to clean the connecting cover 36 while adjusting the casting's position.

[0024] like Figures 4-5 As shown, the circulating cleaning module includes a mounting frame 325, inside which a movable seat 3251 is provided. A through groove is provided at one end of the mounting frame 325 near the connecting cover 36. Both ends of the through groove are provided with sealing covers 3252. The working end of the movable seat 3251 is located in the through groove and connected to the two sealing covers 3252. A cleaner 3253 is provided on the side of the working end of the movable seat 3251 near the connecting cover 36.

[0025] like Figure 3 As shown, the reversing assembly includes valves and a hydraulic unit. The rotary drive 33 drives the hydraulic unit through a gear assembly 322. Both ends of the mounting bracket 325 are connected to the hydraulic unit through valves.

[0026] When the cyclic cleaning module needs to work, the operator can activate the rotary drive 33 (the gear assembly 324 is disconnected from the rotary drive 33). The rotary drive 33 serves as the power source for the hydraulic unit, which intermittently supplies hydraulic oil to both ends of the mounting bracket 325. That is, when the hydraulic unit supplies hydraulic oil to one end of the mounting bracket 325, the hydraulic oil will push the movable seat 3251 to slide to the other end of the mounting bracket 325. The cleaner 3253 connected to the working end of the movable seat 3251 will then perform horizontal scraping along the top surface of the connecting cover 36. Subsequently, the hydraulic unit switches the oil supply direction through the valve, sending hydraulic oil to the other end of the mounting bracket 325, pushing the movable seat 3251 to reset in the reverse direction. The cleaner 3253 then performs reverse scraping. This process is repeated to form a periodic bidirectional cleaning action.

[0027] like Figure 2 , Figures 7-8 As shown, the fixing mechanism 4 includes a first workbench 41, a second workbench 42, and a tooling fixture 43. The first workbench 41, the second workbench 42, and the tooling fixture 43 are arranged sequentially on the bracket 32. The second workbench 42 is provided with a sliding groove 421. The tooling fixture 43 is provided with a slider 431 at one end near the second workbench 42. The slider 431 cooperates with the sliding groove 421. During operation, the operator places the casting on the tooling fixture 43, and then the operator can push the tooling fixture 43 to move on the second workbench 42 so that the casting can reach the preset processing position.

[0028] like Figures 7-8 As shown, both ends of the slider 431 are provided with chopping bevels, and both cavities 424 are connected to an external air pump. After the work is completed, the operator can drive the tooling fixture 43 to move on the workbench 42. When the tooling fixture 43 moves, the slider 431 will move synchronously in the slide groove 421, forcibly pushing and removing the curled iron filings or oil stains accumulated in the slide groove 421 forward or backward. Finally, both ends of the workbench 42 are provided with cavities 424. The end of the cavity 424 near the slide groove 421 is provided with a through hole, and a sealing component is provided in the through hole. When the machine tool is cutting the casting, the sealing component closes. When the cutting operation is completed and the slider 431 moves the debris in the groove 421 to the end of the groove 421, the operator can start the external air pump. At this time, high-pressure air will be sprayed out through the cavity 424 and the through hole, and perform high-pressure sweeping on the end of the groove 421. This blows out the remaining debris and coolant directly from the groove 421, preventing small debris from raising the slider 431 and ensuring subsequent positioning accuracy. Compared with the current method of directly cleaning the groove 421 with an air gun, this invention can effectively avoid blowing the debris in the groove 421 back into the depth of the groove 421, which would cause the debris to become tighter and deeper as it is blown.

[0029] like Figure 7As shown, the sealing assembly includes a sealing block 423 and a fixing frame 422 disposed in the cavity 424. The fixing frame 422 is connected to the sealing block 423 by a connecting rod and to the cavity 424 by a compression spring. When an external air pump delivers high-pressure air into the cavity 424, the air in the cavity 424 will increase and cause the sealing block 423 to rise, thereby opening the through hole. At this time, the high-pressure air will be ejected through the cavity 424 and the through hole and discharged to the outside along the chamber formed by the bottom of the tooling fixture 43 and the slide groove 421. During the discharge process, the high-pressure air can clean away the debris and coolant remaining in the slide groove 421.

[0030] like Figure 3 As shown, each protective unit is equipped with a sealing gasket at one end near the bracket 32. When the protective telescopic cover 34 retracts and expands, the sealing gasket flexibly seals the mechanical gap between adjacent protective units. On the one hand, it effectively prevents the penetration of highly atomized cutting fluid. On the other hand, when the protective telescopic cover 34 retracts, the upper protective unit can effectively clean the surface of the lower protective unit. The surface of the protective unit is coated with an anti-corrosion coating, which can isolate the acid and alkali substances in the cutting fluid from corroding the protective unit, thereby significantly extending the service life of the feed mechanism 3 and the protective telescopic cover 34.

[0031] like Figures 4-6As shown, Embodiment 2 of the present invention provides a reversing assembly for processing casting blanks that differs from Embodiment 1. The difference lies in that the reversing assembly in this embodiment includes a first liquid storage tank 326, a disc 327, a second liquid storage tank 328, and a drive shaft 329. Both ends of the mounting bracket 325 are connected to the first liquid storage tank 326 and the second liquid storage tank 328, respectively. One end of the drive shaft 329 is connected to a rotary drive component 33 via a gear assembly 322, and the other end of the drive shaft 329 is connected to the disc 327. A bracket 3271 is provided on the disc 327. The first liquid storage tank 326 and... Each of the two storage tanks 328 is equipped with a piston. The support 3271 is connected to the pistons in the first storage tank 326 and the second storage tank 328 via a push rod 3272. In this embodiment, when the rotary drive 33 is activated and drives the drive shaft 329 and the disk 327 to rotate continuously via the gear assembly 322, the support 3271 rotates around the center of the disk 327. The rotating support 3271 alternately pulls and pushes the pistons inside the first storage tank 326 and the second storage tank 328 via the push rod 3272. At this time, the pistons inside the first storage tank 326 and the second storage tank 328... The piston will perform synchronous but opposite linear reciprocating suction and pushing movements along its own axis. In this embodiment, both the first liquid storage tank 326 and the second liquid storage tank 328 are filled with a transmission medium (such as hydraulic oil), and the ends of the first liquid storage tank 326 and the second liquid storage tank 328 are respectively connected to the two side chambers inside the mounting frame 325 through pipelines. When the pistons in the first liquid storage tank 326 and the second liquid storage tank 328 periodically move in opposite directions, under the action of the transmission medium, the movable seat 3251 inside the mounting frame 325 will perform high-frequency reciprocating linear movements in the horizontal direction, thereby driving the cleaning... The cleaner 3253 continuously scrapes and cleans the connecting cover 36. Compared with the first embodiment, this embodiment can be used in harsh environments with high dust and high cutting fluid splashes when processing castings without considering the problem of hydraulic pumps and valves failing to switch due to oil impurities or dust. At the same time, in this embodiment, the rotary drive 33 only needs to rotate continuously in one direction to realize the reciprocating scraping of the cleaner 3253, which effectively avoids the heat loss and backlash accumulation caused by frequent start-stop and switching of the rotary drive 33, and significantly extends the service life of the rotary drive 33.

[0032] The working principle of this invention is as follows: During operation, the operator clamps the casting blank to be processed onto the tooling fixture 43 of the fixing mechanism 4, and pushes the tooling fixture 43 to slide along the slide groove 421 of the worktable 42 via the bottom slider 431 to the target position. During this clamping and movement, the chopping bevels at both ends of the slider 431 forcefully push and remove the previously accumulated curled iron filings in the slide groove 421. At any time, the operator can drive the bracket 32 ​​to move horizontally via the linear drive 35 until the casting blank moves to the preset processing position. When the bracket 32 ​​moves, the protective extensions at both ends of the mounting base 31 extend... The retractable cover 34 then contracts and extends synchronously. When the protective telescopic cover 34 is in the contracted state, the internal protective units move closer together and push against each other, pushing the debris and coolant on the surface of the protective units onto the connecting cover 36. When the operator needs to clean the debris accumulated on the connecting cover 36, he only needs to start the rotary drive 33, which drives the reversing component through the gear assembly 322, causing the movable seat 3251 in the circulating cleaning module to slide back and forth, thereby causing the cleaner 3253 to periodically and bidirectionally scrape the connecting cover 36, thoroughly sweeping the debris on the connecting cover 36 into the chip discharge channel.

[0033] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A machine tool for machining casting blanks, comprising a machine body (1), a cutter head (2), a feed mechanism (3), and a fixing mechanism (4), characterized in that: The feeding mechanism (3) includes a mounting base (31) and a bracket (32). A linear drive element (35) is installed inside the mounting base (31). Protective telescopic covers (34) are installed at both ends of the mounting base (31). The two protective telescopic covers (34) are connected at their closest points via a connecting cover (36). The bracket (32) is connected to the working end of the linear drive element (35) via the connecting cover (36). A rotary drive element (33) is installed on the outer side of the bracket (32). 32) The interior is equipped with a turntable (321) and two circulating cleaning modules. One end of the turntable (321) is connected to the fixing mechanism (4), and the other end of the turntable (321) is connected to the rotary drive (33) through the gear assembly (324). The two circulating cleaning modules are arranged opposite to each other at both ends inside the bracket (32). Each circulating cleaning module is matched with a protective telescopic cover (34). The rotary drive (33) is connected to the two circulating cleaning modules through the gear assembly (322) and the reversing assembly. The circulating cleaning module includes a mounting frame (325), inside which is a movable seat (3251). A through groove is provided at one end of the mounting frame (325) near the connecting cover (36), and sealing covers (3252) are provided at both ends of the through groove. The working end of the movable seat (3251) is located in the through groove and connected to the two sealing covers (3252). A cleaner (3253) is provided on the side of the working end of the movable seat (3251) near the connecting cover (36). The reversing assembly includes a first liquid storage tank (326), a disc (327), a second liquid storage tank (328), and a drive shaft (329). The two ends of the mounting bracket (325) are connected to the first liquid storage tank (326) and the second liquid storage tank (328) respectively. One end of the drive shaft (329) is connected to the rotary drive component (33) through a gear assembly (322), and the other end of the drive shaft (329) is connected to the disc (327). A bracket (3271) is provided on the disc (327). Pistons are provided in both the first liquid storage tank (326) and the second liquid storage tank (328). The bracket (3271) is connected to the pistons in the first liquid storage tank (326) and the second liquid storage tank (328) through a push rod (3272).

2. The machine tool for machining casting blanks according to claim 1, characterized in that: The protective telescopic cover (34) includes several protective units, which are arranged sequentially along the moving direction of the bracket (32), and a movable connecting part is provided between two adjacent protective units; When two adjacent protective units are fully retracted, the end faces of the two adjacent protective units near the bracket (32) are flush with each other.

3. The machine tool for machining casting blanks according to claim 1, characterized in that: The gear assembly (324) is connected to the rotary drive (33) via a clutch coupling (323).

4. A machine tool for machining casting blanks according to any one of claims 1-3, characterized in that: The fixing mechanism (4) includes a workbench one (41), a workbench two (42) and a tooling fixture (43). The workbench one (41), the workbench two (42) and the tooling fixture (43) are arranged sequentially on the bracket (32). The workbench two (42) is provided with a sliding groove (421). The tooling fixture (43) is provided with a slider (431) at one end near the workbench two (42). The slider (431) cooperates with the sliding groove (421).

5. A machine tool for processing casting blanks according to claim 4, characterized in that: Both ends of the slider (431) are provided with shovel bevels, and both ends of the workbench (42) are provided with cavities (424). The cavity (424) near the slide groove (421) is provided with a through hole, and a sealing component is provided in the through hole. Both cavities (424) are connected to an external air pump.

6. A machine tool for machining casting blanks according to claim 5, characterized in that: The sealing assembly includes a sealing block (423), and a fixing frame (422) is provided in the cavity (424). The fixing frame (422) is connected to the sealing block (423) by a connecting rod, and the fixing frame (422) is connected to the cavity (424) by a compression spring.

7. A machine tool for machining casting blanks according to claim 2, characterized in that: Each protective unit has a sealing gasket at one end near the bracket (32), and the surface of the protective unit is coated with an anti-corrosion coating.

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