Numerically-controlled machine tool for sheet metal turning

Abstract

The invention belongs to the related technical field of numerical control machine tools, and particularly discloses a numerical control machine tool for sheet metal turning, which comprises a base, a machining center shell, a computer controller, a guide rail lifting mechanism, an X-axis driving mechanism, a Y-axis driving mechanism and a turning mechanism, the two sides of the bottom of the Y-axis driving mechanism are erected above the inner wall of the material collecting chamber through correspondingly-arranged frame bases, the bottom of the X-axis driving mechanism slides above the Y-axis driving mechanism through an arranged Y-axis sliding table, the outer portion of the X-axis driving mechanism is connected with a ring disc through an X-axis sliding table arranged in a sliding mode, and a clamping mechanism is arranged above the ring disc. A connecting plate is arranged on one side of the X-axis sliding table, a hydraulic abutting and supporting mechanism is arranged above one end of the connecting plate, a workpiece can be supported in a wrap angle form in a self-adaption mode through the arranged rotating adjusting arc-shaped supporting rod, radial cutting force is counteracted, and the problem that the thin-wall workpiece is locally sunken is solved.

Description

Technical Field

[0001] This invention belongs to the technical field of CNC machine tools, and specifically discloses a CNC machine tool for sheet metal turning. Background Technology

[0002] This refers to CNC machine tools used for sheet metal turning (usually turning centers or mill-turn centers, used to process relatively thin-walled, easily deformable sheet metal rotating parts).

[0003] Disc-shaped sheet metal parts refer to parts manufactured using a disc-based shape through sheet metal processing. Common examples include pressure vessels, tanks, and automobile wheel rims, with wide applications. The manufacturing process mainly includes material selection, cutting, stamping, forming, and machining. Attention must be paid to material selection, thickness control, forming process selection, and surface treatment during manufacturing. When processing sheet metal parts of this shape, the sheet metal parts have poor rigidity, and cutting force, centrifugal force, and clamping force can easily cause deformation, tool deflection, and vibration. In particular, when turning and punching holes on the edge of a disc, the cutting force can cause the sheet metal parts to deform and the workpiece to become concave. Therefore, it is necessary to improve it. Summary of the Invention

[0004] The purpose of this invention is to solve the problems existing in the background art, and to propose a CNC machine tool for sheet metal turning, including a base, a machining center housing, a computer controller, a guide rail lifting mechanism, an X-axis drive mechanism, a Y-axis drive mechanism, and a turning mechanism. The machining center housing is disposed above the base, and a material collection chamber is opened inside the base. The bottom sides of the Y-axis drive mechanism are supported on the upper walls of the material collection chamber by corresponding brackets. The bottom of the X-axis drive mechanism slides above the Y-axis drive mechanism via a Y-axis slide. A ring plate is connected to the outside of the X-axis drive mechanism via a sliding X-axis slide. A clamping mechanism is disposed above the ring plate. A connecting plate is disposed on one side of the X-axis slide, and a hydraulic support mechanism is disposed above one end of the connecting plate.

[0005] Preferably, a bracket is provided at the rear end of the inner wall of the machining center housing, the guide rail lifting mechanism is provided above the bracket, the guide rail lifting mechanism controls the turning mechanism to move up and down outside the bracket, a rotating bracket is provided at the lower end of the computer controller, the end of the rotating bracket away from the computer controller is connected to the outer wall of the base, and sliding windows are slidably installed on both sides of the inner side of the machining center housing near the front end.

[0006] Preferably, the clamping mechanism includes two vertically mounted support rods on both sides above the ring disk, with an arc-shaped abutment fixedly mounted on top of each of the two support rods, and a pneumatic mechanism mounted on the outer wall of the side of the two support rods that are far apart from each other.

[0007] Preferably, the pneumatic mechanism includes a first cylinder fixedly mounted on the outer wall of one side of the frame rod. The telescopic end of the first cylinder is provided with a clamping plate. The inner surface of the clamping plate is provided with an anti-slip pad. The two clamping plates together hold a disc workpiece, and the bottom of the disc workpiece abuts against the upper surfaces of the two arc-shaped abutting rods.

[0008] Preferably, the hydraulic support mechanism includes a sleeve mounted above one end of the connecting plate, a hydraulic cylinder is mounted inside the sleeve, a push rod is fixedly mounted on the telescopic end of the hydraulic cylinder, a fixed plate is mounted on one side of the outer wall of the push rod, a second cylinder is mounted on the outer wall of the fixed plate, a stop is mounted on the telescopic end of the second cylinder, a fixed column is mounted above the stop, and a rotating mechanism is mounted on both sides of the outer wall of the fixed column.

[0009] Preferably, the rotating mechanism includes an L-shaped frame fixedly disposed on one side of the outer wall of the fixed column, a rotating shaft inserted inside the L-shaped frame, a rotating sleeve rotatably disposed outside the rotating shaft, and an arc-shaped support rod disposed outside the rotating sleeve.

[0010] Preferably, a locking post is provided below the end of the two arc-shaped support rods away from the rotating sleeve, and a locking sleeve is rotatably provided on the outside of the locking post. A bidirectional telescopic cylinder is provided between the two locking sleeves. A guide frame is provided in the middle outside the bidirectional telescopic cylinder. A base is provided at one end of the guide frame, and a connecting seat is provided on the side of the base away from the guide frame. The connecting seat is fixedly connected to the abutment.

[0011] Preferably, a third cylinder is provided in the middle of the machine base, and a bracket is fixedly provided at the telescopic end of the third cylinder. A second motor is fixedly installed on one side of the bracket, and the output end of the second motor passes through the interior of the bracket and is connected to a grinding roller at its end.

[0012] Preferably, a first motor is disposed in the middle of the X-axis slide, and the output end of the first motor is connected to the bottom of the ring disk.

[0013] Compared with the prior art, the present invention has the following beneficial effects: The position of the first slide can be adjusted by setting up the X-axis drive mechanism, X-axis slide, Y-axis drive mechanism, and Y-axis slide to cooperate with the turning mechanism for machining operations.

[0014] The first motor can drive the ring disc, support rod, and arc-shaped stop rod to rotate, so that the disc workpiece can be rotated and turned according to the processing requirements.

[0015] By using a hydraulic support mechanism and a rotating mechanism, the edge of the cutting point can be dynamically supported at the bottom of the disc, directly offsetting the cutting force that causes deformation of thin-walled parts and improving the machining accuracy of the disc workpiece.

[0016] The coordinated operation of the bidirectional telescopic cylinder, the rotating sleeve, and the rotating shaft allows control of the opening and closing angles of the arc-shaped abutments on both sides in the cutting point area. This enables the turning mechanism to flexibly adjust its position when machining the edge of the disc, expanding the arc support area and distributing the cutting force to the support area. It has strong versatility and can adapt to supporting the edge of the disc and the bottom center.

[0017] After turning is completed, the third cylinder pushes the chuck to rise, and the second motor drives the grinding roller to rotate, grinding the bottom edge of the hole to improve machining accuracy. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is another schematic diagram of the overall connection structure of the present invention; Figure 3 This is a schematic diagram of the connection structure between the bracket and the guide rail lifting mechanism of the present invention; Figure 4 This is a schematic diagram of the connection structure between the X-axis drive mechanism, the Y-axis drive mechanism, and the support frame of the present invention; Figure 5 This is a schematic diagram of the connection structure between the Y-axis slide and the first motor of the present invention; Figure 6 This is a schematic diagram of the connection structure of the hydraulic support mechanism of the present invention; Figure 7 This is a schematic diagram of the connection structure between the second cylinder and the arc-shaped support rod of the present invention; Figure 8 This is a schematic diagram of the connection structure between the connecting seat, the grinding roller, and the machine base of the present invention; Figure 9 For the present invention Figure 7 Schematic diagram of the structure at point A in the middle.

[0019] In the diagram: 1. Base; 2. Machining center housing; 3. Sliding window; 4. Rotating bracket; 5. Computer controller; 6. Guide rail lifting mechanism; 7. X-axis drive mechanism; 8. X-axis slide table; 9. Ring plate; 10. Turning mechanism; 11. Bracket; 12. Y-axis drive mechanism; 13. Sleeve; 14. Material collection chamber; 15. Frame base; 16. Top rod; 17. Connecting plate; 18. Frame rod; 19. Y-axis slide table; 20. First motor; 21. Clamping plate; 22. Disc; 23. First cylinder; 24. Arc-shaped abutment; 25. Arc-shaped support; 26. Second cylinder; 27. Hydraulic cylinder; 28. Fixing plate; 29. ​​Sleeve; 30. Bidirectional telescopic cylinder; 31. Guide frame; 32. Clamping post; 33. Grinding roller; 34. Third cylinder; 35. Machine base; 36. Clamping seat; 37. Connecting seat; 38. Second motor; 39. Fixing post; 40. Rotating sleeve; 41. L-shaped frame; 42. Rotating shaft; 43. Abutment. Detailed Implementation

[0020] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] Numerous specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and therefore the invention is not limited to the specific embodiments disclosed below.

[0022] like Figures 1-9 The CNC machine tool for sheet metal turning shown includes a base 1, a machining center housing 2, a computer controller 5, a guide rail lifting mechanism 6, an X-axis drive mechanism 7, a Y-axis drive mechanism 12, and a turning mechanism 10. The machining center housing 2 is located above the base 1. A material collection chamber 14 is provided inside the base 1. The bottom sides of the Y-axis drive mechanism 12 are supported on the inner wall of the material collection chamber 14 by corresponding brackets 15. The material collection chamber 14 is used to guide and collect the waste chips from the processed workpiece. The bottom of the X-axis drive mechanism 7 slides above the Y-axis drive mechanism 12 via a Y-axis slide 19. An X-axis slide 8 is slidably connected to a ring plate 9 outside the X-axis drive mechanism 7. A clamping mechanism is provided above the ring plate 9. A connecting plate 17 is provided on one side of the X-axis slide 8. A hydraulic support mechanism is provided above one end of the connecting plate 17.

[0023] A bracket 11 is provided at the rear end of the inner wall of the machining center housing 2. A guide rail lifting mechanism 6 is provided above the bracket 11. The guide rail lifting mechanism 6 controls the turning mechanism 10 to move up and down outside the bracket 11. A rotating bracket 4 is provided at the lower end of the computer controller 5. The end of the rotating bracket 4 away from the computer controller 5 is connected to the outer wall of the base 1. Sliding windows 3 are slidably installed on both sides of the inner side of the machining center housing 2 and near the front end. The computer controller 5 plans the machining path and drives the ring disk 9 and the disc workpiece 22 to move through the X-axis drive mechanism 7 and the Y-axis drive mechanism 12. The machining center housing 2, computer controller 5, guide rail lifting mechanism 6, X-axis drive mechanism 7, Y-axis drive mechanism 12, and turning mechanism 10 are all commonly used drive components in existing CNC machine tools, so they will not be described in detail. The sliding window 3 can close the machining center housing 2 during operation and machining to achieve the effect of dust suppression and noise reduction.

[0024] The clamping mechanism includes two vertically mounted support rods 18 on both sides above the ring disk 9. Each of the two support rods 18 has an arc-shaped abutment rod 24 fixedly mounted on its upper side. The outer walls of the two support rods 18 on opposite sides are equipped with pneumatic mechanisms. The pneumatic mechanisms include a first cylinder 23 fixedly mounted on the outer wall of one side of the support rod 18. The telescopic end of the first cylinder 23 is equipped with a clamping plate 21. The inner surface of the clamping plate 21 is equipped with an anti-slip pad. The two clamping plates 21 are used to clamp the disc workpiece 22. The bottom of the disc workpiece 22 abuts against the upper surfaces of the two arc-shaped abutment rods 24. The support rod 18 supports the arc-shaped abutment rod 24 below the ring disk 9, so that the arc-shaped abutment rod 24 can provide edge support at the bottom of the disc workpiece 22; The first cylinder 23 is started, which drives the two side clamping plates 21 to flexibly clamp the outer edge of the disc workpiece 22. The anti-slip pad is made of rubber material, which can ensure the stability of the disc workpiece 22 during the machining of the turning mechanism 10.

[0025] The hydraulic support mechanism includes a sleeve 13 mounted above one end of the connecting plate 17. A hydraulic cylinder 27 is housed inside the sleeve 13. A push rod 16 is fixedly mounted on the telescopic end of the hydraulic cylinder 27. A fixing plate 28 is mounted on one side of the outer wall of the push rod 16. A second cylinder 26 is mounted on the outer wall of the fixing plate 28. A stop seat 43 is mounted on the telescopic end of the second cylinder 26. A fixing column 39 is mounted above the stop seat 43. Rotating mechanisms are mounted on both sides of the outer wall of the fixing column 39. Each rotating mechanism includes an L-shaped frame 41 fixedly mounted on one side of the outer wall of the fixing column 39. A rotating shaft 42 is inserted inside, and a rotating sleeve 40 is rotatably mounted on the outside of the rotating shaft 42. An arc-shaped support rod 25 is mounted on the outside of the rotating sleeve 40. A locking post 32 is mounted below the end of the two arc-shaped support rods 25 away from the rotating sleeve 40. A locking sleeve 29 is rotatably mounted on the outside of the locking post 32. A bidirectional telescopic cylinder 30 is mounted between the two locking sleeves 29. A guide frame 31 is mounted in the middle outside the bidirectional telescopic cylinder 30. A base 35 is mounted at one end of the guide frame 31. A connecting seat 37 is mounted on the side of the base 35 away from the guide frame 31. The connecting seat 37 is fixedly connected to the abutment 43. The X-axis slide 8 has a first motor 20 in the middle. The output end of the first motor 20 is connected to the bottom of the ring disk 9. The first motor 20 can drive the ring disk 9 to rotate, causing the ring disk 9 and the circular workpiece 22 above it to rotate, and cooperate with the turning mechanism 10 to perform circumferential hole cutting.

[0026] The hydraulic cylinder 27 vertically lifts and drives the push rod 16 and the fixed plate 28 to move up and down, and the second cylinder 26 drives the abutment 43 to move into the inside of the ring disk 9, so that the arc-shaped support rod 25 approaches the bottom of the disc workpiece 22. The bidirectional telescopic cylinder 30 retracts synchronously, and the collet 29 drives the collet 32 ​​to retract inward, forcing the arc-shaped support rod 25 to rotate around the rotating shaft 42 until the turning mechanism 10 is cutting a hole above it. At this time, the arc-shaped support rod 25 can provide support at the bottom cutting range of the disc workpiece 22. When the disc workpiece 22 is circumferentially equidistantly drilled, the second cylinder 26 needs to exit from the ring disc 9 when the support rod 18 rotates, and then re-enter to support the opening and closing angle of the arc-shaped support rod 25, so as to adapt to the curved surface support requirements of the disc workpiece 22 at different radii, and therefore will not cause positional obstruction with the support rod 18.

[0027] A third cylinder 34 is installed in the middle of the machine base 35. A card seat 36 is fixedly installed at the telescopic end of the third cylinder 34. A second motor 38 is fixedly installed on one side of the card seat 36. The output end of the second motor 38 passes through the inside of the card seat 36 and is connected to a grinding roller 33 at its end. The third cylinder 34 pushes the card seat 36 and the grinding roller 33 to rise, so that the grinding roller 33 contacts the edge of the bottom hole of the disc workpiece 22 and grinds the burrs generated by the concave hole.

[0028] Working principle: When in use, the disc workpiece 22 is placed above the arc-shaped support rod 24. Driven by the first cylinder 23, the clamping plate 21 flexibly clamps the outer edge to ensure stability during processing. Then, the computer controller 5 plans the path and drives the X-axis drive mechanism 7 and the Y-axis drive mechanism 12 to move, positioning the ring disk 9 and causing the disc workpiece 22 to correspond to the position of the turning mechanism 10. Driven by the lifting of the hydraulic cylinder 27, the height of the abutment 43 can be controlled at one end. Then, the second cylinder 26 drives the abutment 43 to move into the interior of the ring disk 9. When the turning mechanism 10 moves to the disc workpiece 22 to cut a hole, the bidirectional telescopic cylinder 30 retracts synchronously according to the position of the hole. The collet 29 drives the collet 32 ​​to retract, forcing the arc-shaped support rod 25 to rotate around the rotating shaft 42, causing the two collet 32 ​​to move closer to each other. As a result, the arc-shaped support rod 25 can provide bottom support at the edge of the current hole, reducing the deformation of the disc workpiece 22. The arc-shaped support rod 25 forms an all-round corner support in the cutting area, dispersing the radial cutting force and suppressing the workpiece concave deformation. After the turning is completed, the turning mechanism 10 pushes away, the third cylinder 34 pushes the collet 36 to rise, and the second motor 38 drives the grinding roller 33 to rotate at one end to grind the burrs on the bottom edge of the hole. The cutting debris is guided by the inclination of the inner wall of the base 1 and falls into the collection chamber 14 for centralized recycling.

[0029] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A CNC machine tool for sheet metal turning, comprising a base (1), a machining center housing (2), a computer controller (5), a guide rail lifting mechanism (6), an X-axis drive mechanism (7), a Y-axis drive mechanism (12), and a turning mechanism (10), characterized in that: The machining center housing (2) is located above the base (1). The base (1) has a material collection chamber (14) inside. The bottom sides of the Y-axis drive mechanism (12) are supported on the inner wall of the material collection chamber (14) by corresponding brackets (15). The bottom of the X-axis drive mechanism (7) slides above the Y-axis drive mechanism (12) through the Y-axis slide (19). The X-axis drive mechanism (7) is connected to a ring disk (9) outside the X-axis drive mechanism (7) through a sliding X-axis slide (8). A clamping mechanism is provided above the ring disk (9). A connecting plate (17) is provided on one side of the X-axis slide (8). A hydraulic support mechanism is provided above one end of the connecting plate (17). The hydraulic support mechanism includes a sleeve (13) disposed above one end of the connecting plate (17). A hydraulic cylinder (27) is disposed inside the sleeve (13). A push rod (16) is fixedly disposed at the telescopic end of the hydraulic cylinder (27). A fixing plate (28) is disposed on one side of the outer wall of the push rod (16). A second cylinder (26) is disposed on the outer wall of the fixing plate (28). A stop seat (43) is disposed at the telescopic end of the second cylinder (26). A fixing column (39) is disposed above the stop seat (43). Rotating mechanisms are disposed on both sides of the outer wall of the fixing column (39). The rotating mechanism includes an L-shaped frame (41) fixedly disposed on one side of the outer wall of the fixing column (39). The L-shaped frame (41) contains... A rotating shaft (42) is inserted, and a rotating sleeve (40) is rotatably provided on the outside of the rotating shaft (42). An arc-shaped support rod (25) is provided on the outside of the rotating sleeve (40). A locking post (32) is provided below the end of the two arc-shaped support rods (25) away from the rotating sleeve (40). A locking sleeve (29) is rotatably provided on the outside of the locking post (32). A bidirectional telescopic cylinder (30) is provided between the two locking sleeves (29). A guide frame (31) is provided in the middle outside the bidirectional telescopic cylinder (30). A base (35) is provided at one end of the guide frame (31). A connecting seat (37) is provided on the side of the base (35) away from the guide frame (31). The connecting seat (37) is fixedly connected to the abutment (43).

2. The CNC machine tool for sheet metal turning according to claim 1, characterized in that: The machining center housing (2) has a bracket (11) at the rear end of its inner wall. The guide rail lifting mechanism (6) is located above the bracket (11). The guide rail lifting mechanism (6) controls the turning mechanism (10) to move up and down outside the bracket (11). The computer controller (5) has a rotating bracket (4) at its lower end. The end of the rotating bracket (4) away from the computer controller (5) is connected to the outer wall of the base (1). Sliding windows (3) are slidably installed on both sides of the machining center housing (2) near the front end.

3. The CNC machine tool for sheet metal turning according to claim 1, characterized in that: The clamping mechanism includes two vertically mounted rods (18) on both sides above the ring plate (9). An arc-shaped abutment (24) is fixedly installed above each of the two rods (18), and a pneumatic mechanism is provided on the outer wall of the side of the two rods (18) that are far apart from each other.

4. A CNC machine tool for sheet metal turning according to claim 3, characterized in that: The pneumatic mechanism includes a first cylinder (23) fixedly mounted on the outer wall of one side of the frame rod (18). The first cylinder (23) has a clamping plate (21) at its telescopic end. The inner surface of the clamping plate (21) is provided with an anti-slip pad. The two clamping plates (21) together hold a disc workpiece (22), and the bottom of the disc workpiece (22) abuts against the upper surfaces of the two arc-shaped abutting rods (24).

5. A CNC machine tool for sheet metal turning according to claim 1, characterized in that: The machine base (35) has a third cylinder (34) in the middle. The extension end of the third cylinder (34) is fixedly provided with a card seat (36). A second motor (38) is fixedly installed on one side of the card seat (36). The output end of the second motor (38) passes through the inside of the card seat (36) and is connected to a grinding roller (33) at its end.

6. A CNC machine tool for sheet metal turning according to claim 1, characterized in that: The X-axis slide (8) has a first motor (20) in the middle, and the output end of the first motor (20) is connected to the bottom of the ring disk (9).

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