Double-spindle high-speed high-efficiency vertical machining center quick change structure

Abstract

The application discloses a double-spindle high-speed and high-efficiency vertical machining center quick replacement structure, and relates to the technical field of machining centers. The machining center comprises a machine base, a plurality of clamping toolings for adapting to different machining procedures, a plurality of base tables which are arranged on the machine base and slide in the horizontal direction, a clamping tooling is arranged on each base table, the clamping toolings on the base tables correspond to different machining procedures respectively, and a first driving piece for driving the base tables to slide is arranged on the machine base. A lifting frame which slides in the vertical direction is arranged on the machine base, a positioning frame which slides in the horizontal direction is arranged on the lifting frame, a clamping assembly for clamping a workpiece is arranged on the positioning frame, a second driving piece for driving the lifting frame to lift is arranged on the machine base, and a third driving piece for driving the positioning frame to slide is arranged on the lifting frame. The machining center has the effect that corresponding clamping toolings can be quickly switched according to different procedures, and the machining efficiency is improved.

Description

Technical Field

[0001] This application relates to the technical field of machining centers, and in particular to a quick-change structure for a dual-spindle high-speed and high-efficiency vertical machining center. Background Technology

[0002] A machining center is a highly automated, multi-functional CNC machine tool equipped with a tool magazine and automatic tool changer. It consists of mechanical equipment and a CNC system and can perform various processes such as turning, milling, drilling, boring, and tapping on workpieces. It has good economic benefits for machining parts with complex shapes, high precision requirements, and frequent product changes.

[0003] Currently, when machining workpieces, dual-spindle machining centers require different tools to be changed using an automatic tool changer depending on the machining process. Additionally, for certain machining processes, different workpiece clamping fixtures need to be changed. When changing the clamping fixture, the workpiece must first be removed from the original fixture, then the original clamping fixture must be removed, and a new clamping fixture corresponding to the process must be installed. After that, the workpiece must be reinstalled on the corresponding clamping fixture and repositioned. The entire changeover process is very cumbersome and seriously affects the machining efficiency of the workpiece. Summary of the Invention

[0004] To address the problems existing in the prior art, this application provides a quick-change structure for a dual-spindle high-speed and high-efficiency vertical machining center, which can quickly switch the corresponding clamping fixtures according to different processes, thereby improving machining efficiency.

[0005] This application provides a quick-change structure for a dual-spindle high-speed, high-efficiency vertical machining center, which adopts the following technical solution:

[0006] A quick-change structure for a dual-spindle high-speed and high-efficiency vertical machining center includes a machine base and multiple clamping fixtures for adapting to different machining processes. Multiple bases are slidably mounted on the machine base in the horizontal direction, and each base is equipped with one of the clamping fixtures. Each clamping fixture on each base corresponds to a different machining process. A first driving component is provided on the machine base to drive the sliding of each base. A lifting frame is slidably mounted on the machine base in the vertical direction, and a positioning frame is slidably mounted on the lifting frame in the horizontal direction. The positioning frame is equipped with a clamping assembly for holding the workpiece. A second driving component is provided on the machine base to drive the lifting frame to move up and down, and a third driving component is provided on the lifting frame to drive the sliding of the positioning frame.

[0007] Optionally, the clamping fixture is detachably mounted on the base, and the base is provided with a fixing mechanism for fixing the clamping fixture.

[0008] Optionally, the fixing mechanism includes a mounting slot formed on the base and a mounting block fixedly mounted on the clamping fixture. The mounting block is adapted to the mounting slot, and the fixing mechanism further includes a limiting component for preventing the mounting block from detaching from the mounting slot.

[0009] Optionally, the limiting component includes a stop block, a lever block, and a first elastic element. The side wall of the mounting groove is provided with a receiving groove. The stop block is slidably disposed in the receiving groove. The first elastic element is used to drive the stop block to slide away from the receiving groove. The side wall of the base is provided with a long groove along the sliding direction of the stop block. The lever block is slidably disposed in the long groove and fixedly connected to the stop block.

[0010] Optionally, the end of the stop block away from the receiving groove is provided with a guide slope, which is used to abut against the mounting block and guide the stop block to slide into the receiving groove.

[0011] Optionally, a turntable is rotatably mounted on the positioning frame, and a drive source is provided on the positioning frame to drive the turntable to rotate. The clamping assembly is used to fix the workpiece on the turntable.

[0012] Optionally, the clamping assembly includes a first clamping frame, a second clamping frame, and a bidirectional cylinder. The first clamping frame and the second clamping frame are slidably disposed on the turntable in a direction that approaches or moves away from each other. A clamping area for clamping the workpiece is formed between the first clamping frame and the second clamping frame. The bidirectional cylinder is fixedly disposed on the turntable, and the two piston rods of the bidirectional cylinder are fixedly connected to the first clamping frame and the second clamping frame, respectively.

[0013] Optionally, both the first clamping frame and the second clamping frame have anti-slip pads at their ends that are close to each other.

[0014] Optionally, a socket is provided in the mounting slot, the socket is connected to a power source, and the clamping fixture is provided with a power contact port, which is compatible with the socket and electrically connected to each electrical component on the clamping fixture.

[0015] Optionally, the side wall of the mounting groove is provided with a sealing groove along the circumference of the socket, a sealing block is slidably disposed in the sealing groove, a sealing strip is disposed on the sealing block, an air bladder cavity is disposed in the sealing strip, and a second elastic element is disposed in the sealing groove for driving the sealing block to slide away from the sealing groove.

[0016] In summary, this application includes at least one of the following beneficial technical effects:

[0017] 1. This application sets up clamping fixtures on each base platform to adapt to different processes. When it is necessary to change the clamping fixture, the lifting frame and the positioning frame are first driven to slide, and the workpiece is clamped and fixed on the positioning frame by the clamping assembly, so that the original clamping fixture is released from the workpiece. Then, the lifting frame is driven to rise, so that the workpiece is separated from the original clamping fixture. After that, each base platform is driven to slide, so that the clamping fixture to be replaced slides to the bottom of the workpiece. Then, the lifting frame places the workpiece on the clamping fixture to be replaced and fixes the workpiece on the clamping fixture to be replaced, thus completing the replacement of the clamping fixture. The whole replacement process is convenient and quick, and there is no need to reposition the workpiece during this process, thereby effectively improving the processing efficiency of the workpiece.

[0018] 2. This application improves practicality by detachably mounting the clamping fixture on the base, thereby setting corresponding clamping fixtures on each base according to the processing steps of different workpieces.

[0019] 3. Since the clamping fixture is usually equipped with various electrical components, by setting a socket in the mounting slot of the base and connecting the socket to the power supply, and setting a power contact port on the clamping fixture, when the clamping fixture is installed on the base, the power contact port on the clamping fixture directly connects to the socket in the mounting slot, so that the various electrical components on the clamping fixture can be energized, thus making the installation of the clamping fixture more convenient. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application;

[0021] Figure 2 yes Figure 1 Enlarged view of section A;

[0022] Figure 3 This is a schematic diagram illustrating the structure of the base in an embodiment of this application;

[0023] Figure 4 This is a schematic diagram illustrating the structure of the plug and socket according to an embodiment of this application;

[0024] Figure 5 yes Figure 4 A magnified view of section B.

[0025] Explanation of reference numerals in the attached drawings: 1. Base; 11. Conveyor frame; 12. First drive component; 13. Lifting frame; 14. Second drive component; 15. Positioning frame; 151. Turntable; 152. Drive source; 153. First clamping frame; 154. Second clamping frame; 155. Two-way cylinder; 156. Anti-slip pad; 16. Third drive component; 2. Clamping fixture; 21. Mounting block; 22. Plug; 3. Base; 31. Mounting groove; 32. Stop block; 321. Guide slope; 33. Push block; 34. First elastic element; 35. Socket; 36. Sealing groove; 361. Limiting groove; 37. Sealing block; 371. Limiting block; 372. Sealing strip; 38. Second elastic element. Detailed Implementation

[0026] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0027] This application discloses a quick-change structure for a dual-spindle high-speed, high-efficiency vertical machining center. (Refer to...) Figure 1 It includes a base 1, multiple clamping fixtures 2 for adapting to different processing steps, and multiple bases 3 that are slidably arranged on the base 1 in the horizontal direction. Each base 3 is provided with a fixing mechanism for fixing the clamping fixtures 2.

[0028] Reference Figure 1 A conveyor frame 11 is slidably mounted on the machine base 1 in the horizontal direction. Each base 3 is fixed on the conveyor frame 11 and the base 3 is evenly distributed along the length of the conveyor frame 11. When both spindles on the dual-spindle machining center are located at the machining origin, the distance between two adjacent bases 3 is equal to the distance between the two spindles. A first driving member 12 for driving the conveyor frame 11 to slide is provided on the machine base 1. The first driving member 12 includes a rodless cylinder. The rodless cylinder is fixedly mounted on the machine base 1 and the length of the rodless cylinder is parallel to the sliding direction of the conveyor frame 11. The piston of the rodless cylinder is fixedly connected to the conveyor frame 11.

[0029] Reference Figure 1 , 2 A lifting frame 13 is slidably mounted on the base 1 in the vertical direction. A second driving component 14 for driving the lifting frame 13 to move up and down is provided on the base 1. The second driving component 14 includes a servo cylinder, which is fixedly mounted on the base 1. The piston rod of the servo cylinder is fixedly connected to the lifting frame 13. A positioning frame 15 is slidably mounted on the lifting frame 13 in the horizontal direction. The sliding direction of the positioning frame 15 is perpendicular to the sliding direction of the conveyor frame 11. A third driving component 16 for driving the positioning frame 15 to slide is provided on the lifting frame 13. The third driving component 16 includes a push cylinder, which is fixedly mounted on the lifting frame 13. The piston rod of the push cylinder is fixedly connected to the positioning frame 15.

[0030] Reference Figure 2 A turntable 151 is rotatably mounted on the positioning frame 15. The rotation axis of the turntable 151 is horizontal and parallel to the sliding direction of the positioning frame 15. A drive source 152 for driving the turntable 151 to rotate is provided on the positioning frame 15. The drive source 152 includes a servo motor, which is fixedly mounted on the positioning frame 15. The output shaft of the servo motor is coaxially and fixedly connected to the turntable 151.

[0031] Reference Figure 2 The turntable 151 is provided with a clamping assembly for clamping workpieces. The clamping assembly includes a first clamping frame 153, a second clamping frame 154 and a bidirectional cylinder 155. The first clamping frame 153 and the second clamping frame 154 are slidably disposed on the turntable 151 in a direction that approaches or moves away from each other. The bidirectional cylinder 155 is fixedly disposed on the turntable 151, and the two piston rods of the bidirectional cylinder 155 are fixedly connected to the first clamping frame 153 and the second clamping frame 154 respectively. A clamping area for clamping workpieces is formed between the first clamping frame 153 and the second clamping frame 154.

[0032] Reference Figure 2 Both the first clamping frame 153 and the second clamping frame 154 are provided with anti-slip pads 156 at their close ends. The anti-slip pads 156 are made of rubber. The anti-slip pads 156 increase the stability of the first clamping frame 153 and the second clamping frame 154 when clamping and fixing the workpiece. Furthermore, by using anti-slip pads 156 made of rubber, the first clamping frame 153 and the second clamping frame 154 can effectively prevent the first clamping frame 153 and the second clamping frame 154 from leaving marks on the surface of the workpiece.

[0033] Reference Figure 3 The fixing mechanism includes a mounting groove 31 opened on the base 3 and a mounting block 21 fixedly installed on the clamping fixture 2. The mounting groove 31 is opened in the horizontal direction and the opening direction of the mounting groove 31 is perpendicular to the sliding direction of the base 3. The mounting groove 31 is a T-shaped groove and penetrates the top wall of the base 3. The mounting block 21 is adapted to the mounting groove 31. The clamping fixture 2 is detachably installed on the base 3, so that the corresponding clamping fixture 2 can be set on each base 3 according to the processing steps of different workpieces, thereby improving practicality.

[0034] Reference Figure 3 The fixing mechanism also includes a limiting component for preventing the mounting block 21 from detaching from the mounting groove 31. The limiting component includes a stop block 32, a lever block 33, and a first elastic element 34. The lower side wall of the mounting groove 31 is provided with a receiving groove communicating with the mounting groove 31 in the vertical direction. The stop block 32 is slidably disposed in the receiving groove in the vertical direction. The side wall of the base 3 is provided with a long strip groove communicating with the receiving groove in the sliding direction of the stop block 32. The lever block 33 is slidably disposed in the long strip groove and is fixedly connected to the stop block 32.

[0035] Reference Figure 3The first elastic element 34 includes a first compression spring, which is disposed in the receiving groove. One end of the first compression spring abuts against the bottom wall of the receiving groove, and the other end of the first compression spring abuts against the stop block 32. The stop block 32 has a guide slope 321 at the end away from the receiving groove. The guide slope 321 gradually approaches the first compression spring along the direction close to the opening of the mounting groove 31.

[0036] The clamping fixture 2 is inserted horizontally into the mounting groove 31 of the base 3 via the mounting block 21. When the mounting block 21 is inserted into the mounting groove 31, it abuts against the guide slope 321 on the stop block 32 and pushes the stop block 32 into the receiving groove through the guide slope 321, so that the mounting block 21 can slide smoothly in the mounting groove 31. When the mounting block 21 abuts against the side wall of the mounting groove 31 away from the groove opening, the stop block 32 just disengages from the bottom wall of the mounting block 21. At this time, the stop block 32 slides away from the receiving groove under the elastic force of the first compression spring and makes contact with the side wall of the mounting block 21 near the groove opening of the mounting groove 31, thereby limiting the mounting block 21 and fixing the clamping fixture 2 on the base 3.

[0037] Reference Figure 3 , 4 A socket 35 is fixedly installed on the side wall of the mounting slot 31. The socket 35 is connected to a power source. A plug 22 is fixedly installed on the mounting block 21. The plug 22 is compatible with the socket 35 and is electrically connected to the electrical components on the clamping fixture 2. Since the clamping fixture 2 is usually equipped with various electrical components, for example, the clamping fixture 2 used for turning and milling is equipped with a spindle for driving the workpiece to rotate, thereby cooperating with the turning and milling of the workpiece. At the same time, in order to improve the clamping efficiency of the workpiece, many clamping fixtures 2 are also equipped with electrical clamping to replace the traditional manual clamping method. By setting the socket 35 in the mounting slot 31 of the base 3 and connecting the socket 35 to the power source, and setting the power contact port on the clamping fixture 2, when the clamping fixture 2 is installed on the base 3, the power contact port on the clamping fixture 2 directly connects to the socket 35 in the mounting slot 31, so that the electrical components on the clamping fixture 2 can be energized, thus making the clamping fixture 2 more convenient to install.

[0038] Reference Figure 4 , 5A sealing groove 36 is provided on the side wall of the mounting groove 31 along the circumference of the socket 35. A sealing block 37 is slidably disposed in the sealing groove 36. A limit block 371 is fixedly disposed on the side wall of the sealing block 37. A limit groove 361 is provided on the side wall of the sealing groove 36 along the sliding direction of the sealing block 37. The limit block 371 is slidably disposed in the limit groove 361. A sealing strip 372 is provided on the sealing block 37. The sealing strip 372 is made of insulating rubber and has an air bladder cavity inside. A second elastic member 38 is provided in the sealing groove 36 to drive the sealing block 37 to slide away from the sealing groove 36. The second elastic member 38 includes a second compression spring. The second compression spring is disposed in the sealing groove 36. One end of the second compression spring abuts against the bottom wall of the sealing groove 36, and the other end of the second compression spring abuts against the sealing block 37.

[0039] When the plug 22 mates with the socket block, the mounting block 21 abuts against the sealing strip 372 and pushes the sealing block 37 to slide within the sealing groove 36. At the same time, the sealing strip 372 is squeezed and deformed to seal the gap between the sealing block 37 and the sealing groove 36, as well as the gap between the socket 35 and the mounting block 21. Since coolant is usually sprayed onto the surface of the workpiece during turning, milling, or drilling to cool it down, the sealing strip 372 effectively prevents coolant from entering the connection between the socket 35 and the plug 22, thus avoiding short circuits or electric shocks and increasing safety.

[0040] The implementation principle of the quick-change structure of a dual-spindle high-speed and high-efficiency vertical machining center in this application embodiment is as follows: Clamping fixtures 2 for different processes are respectively set on each base 3. When it is necessary to change the clamping fixture 2, the lifting frame 13 and the positioning frame 15 are first slidable to position the workpiece between the first clamping frame 153 and the second clamping frame 154. Then, the bidirectional cylinder 155 drives the first clamping frame 153 and the second clamping frame 154 to move closer together, clamping and fixing the workpiece on the first clamping frame 153 and the second clamping frame 154, causing the original clamping fixture 2 to release its clamping of the workpiece. Then, the lifting frame 13 and the positioning frame 15 are moved closer together to position the workpiece. The lifting frame 13 rises, separating the workpiece from the original clamping fixture 2. Then, it drives each base 3 to slide, allowing the clamping fixture 2 to be replaced to slide below the workpiece. At the same time, according to the processing procedure and the position of the workpiece to be processed, the turntable 151 is rotated to adjust the clamping angle of the workpiece. Then, the lifting frame 13 places the workpiece on the clamping fixture 2 to be replaced and fixes the workpiece on the clamping fixture 2 to be replaced, thus completing the replacement of the clamping fixture 2. The entire replacement process is convenient and quick, and during this process, there is no need to reposition the workpiece, thereby effectively improving the processing efficiency of the workpiece.

[0041] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A quick change structure of a high-speed and high-efficiency vertical machining center with double spindles, comprising a machine base (1) and a plurality of clamping tools (2) for adapting different machining processes, characterized in that: The machine base (1) is provided with a plurality of bases (3) slidably arranged in the horizontal direction. Each base (3) is provided with a clamping fixture (2), and the clamping fixture (2) on each base (3) corresponds to a different processing procedure. The machine base (1) is provided with a first driving member (12) for driving each base (3) to slide. A lifting frame (13) is slidably arranged on the base (1) in the vertical direction. A positioning frame (15) is slidably arranged on the lifting frame (13) in the horizontal direction. A clamping component for clamping the workpiece is provided on the positioning frame (15). A second driving member (14) for driving the lifting frame (13) to rise and fall is provided on the base (1). A third driving member (16) for driving the positioning frame (15) to slide is provided on the lifting frame (13). The clamping fixture (2) is detachably mounted on the base (3), and the base (3) is provided with a fixing mechanism for fixing the clamping fixture (2); The fixing mechanism includes a mounting groove (31) opened on the base (3) and a mounting block (21) fixedly disposed on the clamping fixture (2). The mounting block (21) is adapted to the mounting groove (31). The fixing mechanism also includes a limiting component for preventing the mounting block (21) from detaching from the mounting groove (31). The limiting component includes a stop (32), a lever (33), and a first elastic element (34). The side wall of the mounting groove (31) is provided with a receiving groove. The stop (32) is slidably disposed in the receiving groove. The first elastic element (34) is used to drive the stop (32) to slide away from the receiving groove. The side wall of the base (3) is provided with a long groove along the sliding direction of the stop (32). The lever (33) is slidably disposed in the long groove and is fixedly connected to the stop (32).

2. The quick change structure of a high-speed and high-efficiency vertical machining center with double spindles according to claim 1, characterized in that: The stop block (32) has a guide slope (321) at the end away from the receiving groove. The guide slope (321) is used to abut against the mounting block (21) and guide the stop block (32) to slide into the receiving groove.

3. The quick-change structure for a dual-spindle high-speed and high-efficiency vertical machining center according to claim 1, characterized in that: A turntable (151) is rotatably mounted on the positioning frame (15), and a drive source (152) is provided on the positioning frame (15) to drive the turntable (151) to rotate. The clamping assembly is used to fix the workpiece on the turntable (151).

4. The quick-change structure for a dual-spindle high-speed and high-efficiency vertical machining center according to claim 3, characterized in that: The clamping assembly includes a first clamping frame (153), a second clamping frame (154), and a bidirectional cylinder (155). The first clamping frame (153) and the second clamping frame (154) are slidably disposed on the turntable (151) in a direction that approaches or moves away from each other. A clamping area for clamping workpieces is formed between the first clamping frame (153) and the second clamping frame (154). The bidirectional cylinder (155) is fixedly disposed on the turntable (151). The two piston rods of the bidirectional cylinder (155) are fixedly connected to the first clamping frame (153) and the second clamping frame (154), respectively.

5. The quick-change structure for a dual-spindle high-speed and high-efficiency vertical machining center according to claim 4, characterized in that: Anti-slip pads (156) are provided at the ends of the first clamping frame (153) and the second clamping frame (154) that are close to each other.

6. The quick-change structure for a dual-spindle high-speed and high-efficiency vertical machining center according to claim 1, characterized in that: The mounting slot (31) is provided with a socket (35), the socket (35) is connected to a power source, the clamping fixture (2) is provided with a power contact port, the power contact port is adapted to the socket (35), and the power contact port is electrically connected to each electrical component on the clamping fixture (2).

7. The quick-change structure for a dual-spindle high-speed and high-efficiency vertical machining center according to claim 6, characterized in that: The side wall of the mounting groove (31) is provided with a sealing groove (36) along the circumference of the socket (35). A sealing block (37) is slidably disposed in the sealing groove (36). A sealing strip (372) is provided on the sealing block (37). An air bladder cavity is provided in the sealing strip (372). A second elastic element (38) is provided in the sealing groove (36) for driving the sealing block (37) to slide away from the sealing groove (36).

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