CNC machining center for mold

Abstract

The invention relates to the technical field of CNC, in particular to a CNC machining center for molds, which comprises a machine tool shell and a sliding door, the sliding door is slidably connected to the machine tool shell, a workbench is fixedly mounted in the machine tool shell, a machine tool spindle is arranged above the workbench, a tool magazine is further arranged in the machine tool shell, and a control assembly is further arranged in the machine tool shell. According to the tool changing device, the induction assembly and the adjusting assembly are arranged in the tool changing manipulator, the induction assembly can convert the weight of a tool into mechanical transmission, and the adjusting assembly can adjust the clamping force of the clamping jaw according to the tool gravity obtained by the induction assembly; therefore, when the tool changing mechanical arm clamps a light tool, the pressure of the clamping jaw is not too large, the tool is prevented from being abraded, the service life of the tool is prolonged, when the tool changing mechanical arm clamps a heavy tool, large pressure can be applied to the clamping jaw, the tool is prevented from falling off when the tool changing mechanical arm rotates, other devices are protected, and safety is improved.

Description

Technical Field

[0001] The invention relates to the technical field of CNC, in particular to a CNC machining center for a mold. Background Art

[0002] The CNC machining center for molds is a highly automated machine tool. It has its own tool magazine and automatic tool changing function, so that the workpiece can be continuously subjected to multiple machining processes such as drilling, boring, milling, reaming, and tapping after one clamping, greatly improving the machining efficiency. The CNC machining center is particularly suitable for machining workpieces with complex shapes, multiple processes, and high precision requirements, such as box-type workpieces, complex curved surface workpieces, etc. It is now widely used in machinery manufacturing, mold manufacturing, aerospace and other fields.

[0003] CNC machining centers usually use a variety of tools when processing some complex molds. Therefore, automatic tool changing devices are usually installed inside CNC machining centers. The automatic tool changing device mainly uses the tool changing robot to remove the tool on the spindle, and then take out the tool in the tool magazine and install it on the spindle to complete the automatic tool change. When the tool changing robot removes the tool from the spindle or takes it out from the tool magazine, the claw on the tool changing robot will fix the tool on the clamp through the pressure of the spring, and the size of the clamping force of the claw will affect the tool handle on the tool. When the clamping force is too large, the claw will wear the tool handle, thereby affecting the accuracy of clamping the tool handle. If the clamping force is too small, the claw will cause the tool to fall or even be thrown away when clamping a heavier tool, which may cause the tool to hit other equipment, causing damage to the tool and the equipment hit, and may even cause injury to the staff.

[0004] In response to the above problems, the prior art provides some solutions. For example, patent application number: CN201910650080.8 provides a tool changing manipulator, a tool changing mechanism and a tool magazine with a tool position detection function. The tool changing manipulator provided by the invention, by adding a detection mechanism to the tool changing manipulator, is used to detect and determine whether the tool is clamped by the tool claw, thereby preventing the tool from flying out of the tool claw during the tool change rotation, protecting the equipment, and eliminating such safety accidents. However, although this solution can send an alarm signal when the tool claw does not clamp the tool, the machining center needs to stop working at this time to allow the staff to perform maintenance, which will not only increase the workload of the staff, but also affect the machining efficiency when the machining center stops working. Summary of the invention

[0005] The purpose of the present invention is to provide a CNC machining center for molds, so as to solve the problem that when the clamping force of the clamping jaws is too large, the clamping jaws will wear the tool handle on the tool and affect the accuracy of clamping the tool handle; when the clamping force is too small, the tool will fall or even be thrown away when the clamping jaws clamp a heavy tool, which may cause the tool to hit other equipment, causing damage to the tool and the equipment hit, and may even cause harm to the staff, while solving the deficiencies of the existing technical solutions.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A CNC machining center for a mold comprises a machine tool shell and a sliding door, wherein the sliding door is slidably connected to the machine tool shell, a workbench is fixedly installed inside the machine tool shell, a machine tool spindle is arranged above the workbench, a tool magazine is also arranged inside the machine tool shell, a control component is also arranged inside the machine tool shell, a tool changing manipulator is rotatably connected to the control component, a clamping claw is slidably connected inside the tool changing manipulator, one end of the clamping claw is fixedly connected to a locking pin, a limiting block is slidably connected inside the tool changing manipulator, a reset spring is arranged between the limiting block and the inner wall of the tool changing manipulator, and the reset spring is arranged between the limiting block and the inner wall of the tool changing manipulator. A sensing component with a pressure slider is also provided inside the tool manipulator, and the pressure slider is slidably connected to the tool changing manipulator. An adjusting component with an adjusting slider is also provided inside the tool changing manipulator, and the adjusting slider is slidably connected inside the tool changing manipulator. A claw spring is provided inside the tool changing manipulator, and one end of the claw spring is fixedly connected to the claw, and the other end is fixedly connected to the adjusting slider. The adjusting component controls the clamping force of the claw on the tool by controlling the sliding of the adjusting slider, and the sensing component controls the sliding distance of the adjusting slider by sensing the pressure exerted by the tool on the pressure slider.

[0008] It is easy to understand that since the conventional tool changing robot has a fixed clamping force on the tool, if the clamping force is too large, although the tool can be prevented from falling, it will cause greater wear to the tool. If the clamping force is too small, it is easy to fall or even be thrown away when clamping a heavy tool. Therefore, this design sets a sensing component and an adjustment component inside the tool changing robot. When the control component drives the tool changing robot to clamp the tool, the adjustment slider pulls the claw spring to the end. At this time, the thrust applied by the claw spring to the claw is minimal. When the tool squeezes the claw to be clamped by the tool changing robot, the pressure on the claw is minimal. At this time, the wear of the tool by the claw is minimal. When the tool changing robot completely clamps the tool, the weight of the tool will squeeze The pressure slider is a sensor component that can convert the weight of the tool into the displacement of the pressure slider. When the adjusting component adjusts the pressure applied by the clamping claw on the tool by moving the adjusting slider, the adjusting component can adjust the distance moved by the adjusting slider according to the tool gravity obtained by the sensing component. When the tool changing robot clamps a light tool, the pressure of the clamping claw will not be too large, thereby avoiding wear on the tool and increasing the service life of the tool. When clamping a heavy tool, the clamping claw will apply greater pressure to avoid the tool falling off or even being thrown away and hitting other equipment when the tool changing robot rotates, thereby avoiding damage to the tool and other equipment. At the same time, it also avoids the possible injury to the staff caused by the flying tool, thereby improving the safety of the equipment.

[0009] Preferably, the sensing component includes an L-shaped rod, a plurality of pressure springs are arranged between the pressure slider and the inner wall of the tool changing robot, the middle part of the L-shaped rod is hinged to the tool changing robot, and one end of the L-shaped rod is hinged to the pressure slider, the tool changing robot is slidably connected with an unlocking slider, an unlocking spring is arranged between the unlocking slider and the inner wall of the tool changing robot, a pressing rod is slidably connected inside the unlocking slider, a pressing spring is arranged between the pressing rod and the unlocking slider, one end of the pressing rod is fixedly connected with a rectangular block, a ratchet 1 is arranged on the tool changing robot, a lock tongue 1 is hinged on the unlocking slider, the lock tongue 1 is in contact with the ratchet 1, the rectangular block is in contact with one end of the lock tongue 1, and the pressing rod is in contact with one end of the L-shaped rod.

[0010] It is easy to understand that the design sets an L-shaped rod. When the gravity of the tool acts on the pressure slider, the pressure slider will squeeze the pressure spring to slide downward. After the L-shaped rod is subjected to the pressure of the pressure slider, it begins to rotate around the hinge with the tool changing robot. One end of the L-shaped rod applies pressure to the pressing rod on the unlocking slider. At this time, the pressing rod squeezes the pressing spring to slide and drives the rectangular block to move together. At this time, the rectangular block moves from one side of the lock tongue to the other side. The L-shaped rod continues to rotate and begins to push the unlocking slider to slide. The unlocking slider stops after sliding a certain distance, and the sensing component records the gravity of the tool by the distance moved by the unlocking slider. The design has a simple structure and does not require the addition of any electronic detection devices and power devices, thereby reducing the manufacturing cost.

[0011] Preferably, the adjusting assembly includes a connecting slider, a connecting rod is hinged on the connecting slider, a torsion spring is arranged at the hinge of the connecting slider and the connecting rod, a connecting groove is provided on the adjusting slider, one end of the connecting rod is located in the connecting groove and fits with the inner wall of the connecting groove, and the other end of the connecting rod contacts the unlocking slider, a rack 1 is fixedly connected to the connecting slider, a gear is also rotatably connected inside the tool changing manipulator, the gear is meshed with the rack 1, one end of the gear extends to the outside of the tool changing manipulator, a rack 2 is also arranged inside the machine tool shell, when the tool changing manipulator moves toward the main axis of the machine tool, the gear is meshed with the rack 2, a lock tongue 2 is slidably connected inside the adjusting slider, a lock tongue spring is arranged between the lock tongue 2 and the adjusting slider, the tool changing manipulator is provided with a ratchet 2, one end of the lock tongue 2 extends to the outside of the adjusting slider and contacts with the ratchet 2, a control rod is also hinged on the adjusting slider, a torsion spring is arranged at the hinge of the control rod and the adjusting slider, and one end of the control rod contacts with the lock tongue 2.

[0012] It is easy to understand that the design is achieved by setting a gear on the tool changing manipulator. When rack two is engaged with the gear, when the tool changing manipulator moves, rack two drives the gear to rotate, the gear rotates and drives rack one to move, and rack one then drives the connecting slider to move. Since the connecting rod on the connecting slider is in contact with the adjusting slider, the connecting slider will drive the adjusting slider to move during the movement of the connecting slider. The adjusting slider moves and gradually squeezes the claw spring. At this time, the pressure exerted by the claw on the tool gradually increases. When the connecting slider moves a certain distance, one end of the connecting rod will collide with the unlocking slider, causing the connecting rod to rotate. After rotation, the end of the connecting rod located in the connecting groove squeezes The inner wall of the connecting groove is pressed and leaves the connecting groove. At this time, the connecting slider continues to move, while the adjusting slider stops moving due to the contact between the lock tongue 2 and the ratchet 2. When the gear is away from the rack 2, the connecting slider also stops moving. This design uses the movement of the tool changing robot itself as power to drive the adjusting slider to adjust the claw spring during tool changing. Therefore, there is no need to set up an additional power device, which saves costs. The moving distance of the adjusting slider is controlled by the unlocking slider, so the claw can apply corresponding pressure according to the gravity of the tool, avoiding the wear of the tool caused by excessive clamping force, and the drop of the heavy tool caused by insufficient clamping force, thereby improving the service life of the equipment.

[0013] Preferably, a lifting block is provided on the side of the adjusting slider close to the claw, and when the gear controls the rack 1 and then controls the unlocking slider to move in the direction away from the claw, the lifting block contacts the connecting rod, and the connecting rod rotates.

[0014] It is easy to understand that when the connecting slider moves toward the adjusting slider, one end of the connecting rod on the connecting slider contacts the lifting block on the adjusting slider and rotates. At this time, the connecting slider continues to move, and the connecting rod will come to the position of the connecting groove, and the connecting rod is acted upon by the torsion spring to enter the connecting groove. At this time, the connecting slider contacts the adjusting slider, and the connecting slider squeezes the control rod on the adjusting slider. At this time, the control rod rotates, and one end of the control rod contacts and squeezes the lock tongue to make the lock tongue 2 move away from the ratchet 2. At this time, the connecting slider drives the adjusting slider to move together. This design avoids the two ends of the connecting rod on the connecting slider contacting the unlocking slider and the adjusting slider at the same time, causing the connecting slider to be stuck. Setting the lifting block on the adjusting slider can make the connecting rod contact the lifting block first to rotate, so that it will not contact the unlocking slider and cause jamming when continuing to move. This setting ensures the smooth operation of the adjusting component, avoids damage caused by violent collision of internal components, and improves the service life of the equipment.

[0015] Preferably, there is a gap between one side of the pressure slider and the inner wall of the tool changing robot, the gap width is A, and A≤0.05mm. When the adjustment slider moves toward the direction of the clamping claw, the tool squeezes the pressure slider, and at this time one side of the pressure slider contacts the inner wall of the tool changing robot.

[0016] It is easy to understand that when the tool changing robot just removes the tool from the spindle, the gravity of the tool acts on the pressure slider. This design leaves a certain gap between one side of the pressure slider and the inner wall of the tool changing robot. When the gravity of the tool acts on the pressure slider, the pressure slider can avoid friction with the inner wall of the tool changing robot when sliding, thereby avoiding the pressure slider from getting stuck. When the sensing component and the adjusting component have completed their work, the claws will apply pressure to the tool, thereby causing the tool to apply pressure to the pressure slider. At this time, the pressure slider will contact the inner wall of the tool changing robot after being subjected to pressure and squeeze the inner wall of the tool changing robot. The pressure slider is subjected to friction from the tool changing robot, and the pressure slider cannot slide at this time. Therefore, this design also avoids the tool shaking on the tool changing robot when the sensing component and the adjusting component have completed their work and the tool changing robot is rotating because the pressure slider is not fixed, thereby improving the stability of the tool changing robot when it rotates.

[0017] Preferably, a baffle is slidably connected to the tool changing robot, and the baffle is also fixedly connected to the pressure sliding block. The baffle is arc-shaped, and the surface of the baffle fits the surface of the tool changing robot.

[0018] It is easy to understand that when the working tool of the CNC machining center processes the mold, a large amount of debris will be generated and the debris will splash everywhere. If the debris enters the tool changing robot through the sliding position of the pressure slider, the debris will affect the sliding of the pressure slider, and then cause the sensing component to fail to work. This design sets a baffle on the tool changing robot. The baffle is arc-shaped and can better fit the tool changing robot to avoid gaps that cause debris to enter, and the baffle can slide with the pressure slider, so it will not affect the normal operation of the pressure slider. Therefore, this design ensures that the debris will not enter the tool changing robot, avoids the debris from affecting the work of the sensing component, and improves the stability of the sensing component.

[0019] Preferably, a smooth surface is provided on the second rack, and when the tool changing robot moves to the end toward the main shaft, the gear is located on one side of the smooth surface, and at this time, the plane of the adjusting slider away from the clamping claw is in contact with the inner wall of the tool changing robot.

[0020] It is easy to understand that when the tool changing robot installs the tool, the tool changing robot clamps the tool and moves it toward the spindle. At this time, since the movement stroke of the tool changing robot is fixed, no matter whether it is clamping a heavy tool or a light tool, the tool changing robot will clamp the tool and squeeze the spindle, so that the tool and the pressure slide block slide on the tool changing robot until the pressure slide block slides to the end and cannot slide further. In this process, since the adjusting component does not completely relax the clamping claw, the clamping claw still exerts a large pressure on the tool. At this time, if the tool slides on the tool changing robot, it will generate a large friction with the clamping claw, thereby producing Wear occurs, and this design opens a smooth surface on rack 2. When the tool changing robot clamps the tool and moves toward the spindle, rack 2 will mesh with the gear, thereby allowing the adjustment component to reduce the clamping force of the claw on the tool. When the gear follows the tool changing robot to move to the smooth surface, the gear no longer meshes with the rack. At this time, the adjustment slider moves to the maximum distance, and the pressure applied by the claw on the tool is minimum. Therefore, this design can ensure that when the tool is in contact with the spindle, the pressure applied by the claw on the tool is minimum, thereby reducing the friction between the tool and the claw, reducing wear, and increasing the service life of the tool and the claw.

[0021] Preferably, three circular holes are formed on the tool changing robot, and the three circular holes are evenly and equidistantly arranged on the tool changing robot.

[0022] It is easy to understand that most of the structures in the tool changing robot are made of metal materials, so the overall mass of the tool changing robot is very heavy. After the tool changing robot clamps the tool, the weight is further increased. Due to the weight factor, the connection between the tool changing robot and the control component will be subject to greater pressure. Therefore, when the tool changing robot rotates, the wear between the connection between the tool changing robot and the control component is aggravated. This design opens three circular holes on the tool changing robot. The three circular holes can reduce the weight of the tool changing robot to a certain extent, thereby reducing the pressure on the connection between the tool changing robot and the control component. Therefore, this design reduces the wear between the connection between the tool changing robot and the control component, thereby increasing the service life of the tool changing robot.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. The present invention arranges a sensing component and an adjusting component inside the tool changing robot. The sensing component can convert the weight of the tool into the displacement of the pressure slider, and the adjusting component can adjust the clamping force of the claw according to the tool gravity obtained by the sensing component, so that the pressure of the claw will not be too large when the tool changing robot clamps a light tool, thereby avoiding wear of the tool and increasing the service life of the tool. When clamping a heavy tool, the claw will apply a greater pressure to avoid the tool falling when the tool changing robot rotates, thereby protecting other equipment and improving safety.

[0025] 2. The present invention sets an L-shaped rod, and the gravity of the tool acts on the pressure slider, causing the pressure slider to slide downward. The L-shaped rod rotates due to the pressure of the pressure slider, and one end of the L-shaped rod applies pressure to the pressing rod on the unlocking slider, and drives the rectangular block to move together. The L-shaped rod continues to rotate and pushes the unlocking slider to move. The unlocking slider stops after sliding a certain distance, and the sensing component records the gravity of the tool by the distance moved by the unlocking slider. The design structure is simple, and does not require the addition of any electronic detection device and power device, thereby reducing the production cost.

[0026] 3. The present invention arranges gears on the tool changing robot. The design utilizes the movement of the tool changing robot itself as power to drive the adjusting slider to adjust the claw spring. Therefore, there is no need to set up an additional power device, which saves costs. The moving distance of the adjusting slider is controlled by the unlocking slider. Therefore, the claw can apply corresponding pressure according to the gravity of the tool, avoiding wear of the tool due to excessive clamping force and the fall of the heavy tool due to insufficient clamping force, thereby improving the service life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of a CNC machining center for the mold of the present invention;

[0028] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0029] Figure 3 It is a structural schematic diagram of the mechanical tool changer of the present invention;

[0030] Figure 4 for Figure 3 Sectional view at the middle BB;

[0031] Figure 5 for Figure 4 Enlarged view of point C in the middle;

[0032] Figure 6 for Figure 3 Sectional view at DD in the middle;

[0033] Figure 7 for Figure 6 Enlarged view of point E in the middle;

[0034] Figure 8 for Figure 3 Cross-sectional view at FF.

[0035] Fig. 9 This is a schematic diagram of the structure of the unlocking slider of the present invention;

[0036] Fig.10 for Fig. 9 Sectional view at GG in the middle;

[0037] Fig.11 It is a structural schematic diagram of the adjusting slider of the present invention;

[0038] Fig.12 for Fig.11 Sectional view at HH in the middle;

[0039] In the figure: 1. machine tool housing; 2. sliding door; 3. workbench; 4. machine tool spindle; 5. tool magazine; 6. control component; 7. tool changing manipulator; 8. claw; 9. locking pin; 10. limit block; 11. reset spring; 12. pressure slider; 13. adjustment slider; 14. claw spring; 15. L-shaped rod; 16. pressure spring; 17. unlocking slider; 18. unlocking spring; 19. pressing rod; 20. pressing spring; 21. rectangular block; 22. ratchet one; 23. lock tongue one; 24. connecting slider; 25. connecting rod; 26. connecting groove; 27. rack one; 28. gear; 29. ​​rack two; 30. lock tongue two; 31. lock tongue spring; 32. ratchet two; 33. control rod; 34. lifting block; 35. baffle; 36. smooth surface; 37. circular hole. DETAILED DESCRIPTION

[0040] The present invention provides a CNC machining center for a mold, and the technical solution is as follows:

[0041] See also Figures 1 to 12 A CNC machining center for molds comprises a machine tool housing 1 and a sliding door 2, the sliding door 2 is slidably connected to the machine tool housing, a workbench 3 is fixedly installed inside the machine tool housing 1, a machine tool spindle 4 is arranged above the workbench 3, a tool magazine 5 is also arranged inside the machine tool housing 1, a control component 6 is also arranged inside the machine tool housing 1, a tool changing manipulator 7 is rotatably connected to the control component 6, a clamping claw 8 is slidably connected inside the tool changing manipulator 7, one end of the clamping claw 8 is fixedly connected to a locking pin 9, a limited position block 10 is slidably connected inside the tool changing manipulator 7, a reset spring 11 is arranged between the limited position block 10 and the inner wall of the tool changing manipulator 7, and a reset spring 11 is arranged between the limited position block 10 and the inner wall of the tool changing manipulator 7. A sensing component with a pressure slider 12 is also provided inside the hand 7. The pressure slider 12 is slidably connected to the tool changing robot 7. An adjusting component with an adjusting slider 13 is also provided inside the tool changing robot 7. The adjusting slider 13 is slidably connected inside the tool changing robot 7. A claw spring 14 is provided inside the tool changing robot 7. One end of the claw spring 14 is fixedly connected to the claw 8, and the other end is fixedly connected to the adjusting slider 13. The adjusting component controls the clamping force of the claw 8 on the tool by controlling the sliding of the adjusting slider 13. The sensing component controls the sliding distance of the adjusting slider 13 by sensing the pressure exerted by the tool on the pressure slider 12.

[0042] For further information, see Figures 1 to 12The sensing component includes an L-shaped rod 15, three pressure springs 16 are arranged between the pressure slide 12 and the inner wall of the tool changing manipulator 7, the middle part of the L-shaped rod 15 is hinged to the tool changing manipulator 7, and one end of the L-shaped rod 15 is hinged to the pressure slide 12, the tool changing manipulator 7 is slidably connected with an unlocking slide 17, an unlocking spring 18 is arranged between the unlocking slide 17 and the inner wall of the tool changing manipulator 7, a pressing rod 19 is slidably connected inside the unlocking slide 17, and a pressing rod 19 is arranged between the pressing rod 19 and the unlocking slide 17. A pressing spring 20 is arranged, one end of the pressing rod 19 is fixedly connected to a rectangular block 21, a ratchet 22 is arranged on the tool changing manipulator 7, a lock tongue 23 is hinged on the unlocking slider 17, the lock tongue 23 contacts the ratchet 22, the rectangular block 21 contacts one end of the lock tongue 23, the pressing rod 19 contacts one end of the L-shaped rod 15, the adjusting component includes a connecting slider 24, a connecting rod 25 is hinged on the connecting slider 24, a torsion spring is arranged at the hinge of the connecting slider 24 and the connecting rod 25, and the adjusting component includes a connecting slider 24, a connecting rod 25 is hinged on the connecting slider 24, and a torsion spring is arranged at the hinge of the connecting slider 24 and the connecting rod 25. The slider 13 is provided with a connecting groove 26, one end of the connecting rod 25 is located in the connecting groove 26 and fits with the inner wall of the connecting groove 26, the other end of the connecting rod 25 contacts the unlocking slider 17, the connecting slider 24 is fixedly connected with a rack 1 27, the tool changing manipulator 7 is also rotatably connected with a gear 28, the gear 28 is meshed with the rack 1 27, one end of the gear 28 extends to the outside of the tool changing manipulator 7, and a rack 29 is also provided inside the machine tool housing 1. When the tool changing manipulator 7 is moved toward the machine tool spindle 4, the tool changing manipulator 7 is locked. When moving, the gear 28 meshes with the rack 29, and the adjusting slider 13 is slidably connected with the lock tongue 230 inside, and a lock tongue spring 31 is arranged between the lock tongue 230 and the adjusting slider 13. The tool changing manipulator 7 is provided with a ratchet 232, and one end of the lock tongue 230 extends to the outside of the adjusting slider 13 and contacts with the ratchet 232. A control rod 33 is also hinged on the adjusting slider 13, and a torsion spring is arranged at the hinge between the control rod 33 and the adjusting slider 13, and one end of the control rod 33 contacts with the lock tongue 230.

[0043] See also Figures 1 to 12A lifting block 34 is provided on the side of the adjusting slide block 13 close to the claw 8. When the gear 28 controls the rack 27 and then controls the unlocking slide block 17 to move in the direction away from the claw 8, the lifting block 34 contacts the connecting rod 25. At this time, the connecting rod 25 rotates, and there is a gap between one side of the pressure slide block 12 and the inner wall of the tool changing manipulator 7. The gap width is A, A = 0.05mm. When the adjusting slide block 13 moves in the direction of the claw 8, the tool squeezes the pressure slide block 12. At this time, one side of the pressure slide block 12 contacts the inner wall of the tool changing manipulator 7. A baffle 35 is slidably connected to the tool manipulator 7, and the baffle 35 is also fixedly connected to the pressure slider 12. The baffle 35 is arc-shaped, and the surface of the baffle 35 fits with the surface of the tool changing robot 7. A smooth surface 36 is provided on the rack 29. When the tool changing robot 7 moves to the end toward the main axis, the gear 28 is located on one side of the smooth surface 36. At this time, the plane of the adjusting slider 13 away from the side of the claw 8 fits with the inner wall of the tool changing robot 7. Three circular holes 37 are provided on the tool changing robot 7, and the three circular holes 37 are evenly and equidistantly arranged on the tool changing robot 7.

[0044] See also Figures 1 to 12When the control component 6 drives the tool changing manipulator 7 to move upward to clamp the tool, the control component 6 controls the tool changing manipulator 7 to come to the side of the tool. At this time, the limit block 10 on the tool changing manipulator 7 contacts the control component 6 and is pressed by the pressure of the control component 6 to squeeze the reset spring 11 to move. Then the control component 6 drives the tool changing manipulator 7 to rotate. At this time, the claw 8 on the tool changing manipulator 7 contacts the tool. The claw 8 is pressed by the pressure of the tool to squeeze the claw spring 14 and starts to slide. When the groove on the tool is completely fitted with the pressure slider 12, the claw 8 is pushed out again by the claw spring 14 and applies pressure to the tool. At this time, the gravity of the tool acts on the pressure slide 12, causing the pressure slide 12 to squeeze the pressure spring 16 and slide downward. At this time, the L-shaped rod 15 hinged at one end of the pressure slide 12 begins to rotate around the hinge with the tool changing manipulator 7 after receiving the pressure of the pressure slide 12. At this time, one end of the L-shaped rod 15 applies pressure to the pressing rod 19 on the unlocking slide 17. At this time, the pressing rod 19 squeezes the pressing spring 20 to slide and drives the rectangular block 21 to move together. At this time, the rectangular block 21 moves from one side of the lock tongue 23 to the other side, and the L-shaped rod 15 continues to rotate and begins to push the unlocking slide 17 to slide, and the unlocking slide 17 stops after sliding a certain distance. At this time, the control component 6 drives the tool changing manipulator 7 to move downward, and the limit block 10 is reset by the thrust of the reset spring 11, and the rack 29 will mesh with the gear 28 on the tool changing manipulator 7, and in the movement process of the tool changing manipulator 7, the rack 29 drives the gear 28 to rotate, and the gear 28 rotates and drives the rack 1 27 to move, and the rack 1 27 then drives the connecting slider 24 to move. At this time, one side of the connecting rod 25 on the connecting slider 24 squeezes the inner wall of the connecting groove 26 to rotate and contact the inner wall of the connecting slider 24, so that the connecting slider 24 will bring The movable adjusting slider 13 moves, and the adjusting slider 13 moves and gradually squeezes the claw spring 14. At this time, the pressure exerted by the claw 8 on the tool gradually increases. When the connecting slider 24 moves a certain distance, one end of the connecting rod 25 will collide with the unlocking slider 17, causing the connecting rod 25 to rotate. After rotation, the end of the connecting rod 25 located in the connecting groove 26 squeezes the inner wall of the connecting groove 26 and leaves the connecting groove 26. At this time, the connecting slider 24 continues to move, and the adjusting slider 13 stops moving due to the contact between the lock tongue 2 30 and the ratchet 2 32. When the gear 28 is away from the rack 29, the connecting slider 24 also stops moving.

[0045] See also Figures 1 to 12When the control component 6 drives the tool changing manipulator 7 to move upward to install the tool, the control component 6 drives the tool changing manipulator 7 to align the tool on the tool changing manipulator 7 with the spindle. At this time, the control component 6 drives the tool changing manipulator 7 to move upward. When the tool sleeve on the tool enters the tool sleeve hole on the spindle, the rack 29 will mesh with the gear 28 on the tool changing manipulator 7, and during the movement of the tool changing manipulator 7, the rack 29 drives the gear 28 to rotate, and the gear 28 rotates and drives the rack 1 27 to move, and the rack 1 27 then drives the connecting slider 24 to move. After the connecting slider 24 moves a certain distance, one end of the connecting rod 25 on the connecting slider 24 contacts the lifting block 34 on the adjusting slider 13 and rotates. At this time, the connecting slider 24 continues to move, and the connecting rod 25 comes to the position of the connecting groove 26, and the connecting rod 25 is acted upon by the torsion spring and enters the connecting groove 26. At this time, the connecting slider 24 contacts the adjusting slider 1 3, and the connecting slider 24 squeezes the control rod 33 on the adjusting slider 13, at this time the control rod 33 rotates, one end of the control rod 33 contacts and squeezes the lock tongue to make the lock tongue 2 30 away from the ratchet 2 32, at this time the connecting slider 24 drives the adjusting slider 13 to move together, at this time when the gear 28 follows the tool changing manipulator 7 to move to the smooth surface 36, the pressure of the claw 8 on the tool is reduced to a minimum, at this time the tool changing manipulator 7 mechanically moves upward, the tool squeezes the pressure slider 12, at this time the tool moves into place, when the spindle fixes the tool, the control component 6 drives the tool changing manipulator 7 to rotate and move away from the tool, at this time the pressure slider 12 loses the pressure of the tool and resets, the L-shaped rod 15 also resets, at this time the pressing rod 19 on the unlocking slider 17 loses the pressure of the L-shaped rod 15 and resets, and the rectangular block 21 on the L-shaped rod 15 moves to the other side of the lock tongue, at this time the unlocking slider 17 is reset by the action of the unlocking spring 18.

[0046] A specific embodiment of the present invention is described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above described embodiment. For those skilled in the art, various changes, modifications, substitutions and variations of these embodiments without departing from the principles and ideas of the present invention should still fall within the scope of protection of the present invention.

Claims

1. A CNC machining center for a mold, comprising a machine tool housing (1) and a machine tool spindle (4), wherein the machine tool spindle (4) is fixedly installed inside the machine tool housing (1), and a control component (6) is also arranged inside the machine tool housing (1), and a tool changing manipulator (7) is rotatably connected to the control component (6), characterized in that: A clamping claw (8) is slidably connected inside the tool changing manipulator (7), one end of which is fixedly connected to a locking pin (9). A limit block (10) is also slidably connected inside the tool changing manipulator (7), a return spring (11) is provided between the limit block (10) and the inner wall of the tool changing manipulator (7), a sensing component having a pressure slider (12) is also provided inside the tool changing manipulator (7), the pressure slider (12) is slidably connected to the tool changing manipulator (7), and a pressure regulating slider (12) is also provided inside the tool changing manipulator (7). The adjusting component of the block (13) is slidingly connected to the inside of the tool changing robot (7), and a claw spring (14) is arranged inside the tool changing robot (7). One end of the claw spring (14) is fixedly connected to the claw (8), and the other end is fixedly connected to the adjusting block (13). The adjusting component controls the clamping force of the claw (8) on the tool by controlling the sliding of the adjusting block (13), and the sensing component controls the sliding distance of the adjusting block (13) by sensing the pressure of the tool on the pressure block (12).

2. A CNC machining center for molds according to claim 1, characterized in that: The sensing component comprises an L-shaped rod (15), a plurality of pressure springs (16) are arranged between the pressure slide block (12) and the inner wall of the tool changing manipulator (7), the middle part of the L-shaped rod (15) is hinged to the tool changing manipulator (7), and one end of the L-shaped rod (15) is hinged to the pressure slide block (12), the tool changing manipulator (7) is slidably connected to an unlocking slide block (17), an unlocking spring (18) is arranged between the unlocking slide block (17) and the inner wall of the tool changing manipulator (7), and the unlocking slide block (17) is slidably connected to the inner wall of the tool changing manipulator (7). A pressing rod (19) is connected, a pressing spring (20) is arranged between the pressing rod (19) and the unlocking slider (17), one end of the pressing rod (19) is fixedly connected to a rectangular block (21), a ratchet tooth 1 (22) is arranged on the tool changing manipulator (7), a locking tongue 1 (23) is hinged on the unlocking slider (17), the locking tongue 1 (23) is in contact with the ratchet tooth 1 (22), the rectangular block (21) is in contact with one end of the locking tongue 1 (23), and the pressing rod (19) is in contact with one end of the L-shaped rod (15).

3. A CNC machining center for molds according to claim 2, characterized in that: The adjustment assembly comprises a connecting slider (24), a connecting rod (25) is hinged on the connecting slider (24), a torsion spring is arranged at the hinge between the connecting slider (24) and the connecting rod (25), a connecting groove (26) is provided on the adjusting slider (13), one end of the connecting rod (25) is located in the connecting groove (26) and is in contact with the inner wall of the connecting groove (26), the other end of the connecting rod (25) is in contact with the unlocking slider (17), a rack (27) is fixedly connected to the connecting slider (24), a gear (28) is rotatably connected inside the tool changing manipulator (7), the gear (28) is meshed with the rack (27), one end of the gear (28) extends to the outside of the tool changing manipulator (7), and the machine tool housing (1) A rack (29) is also arranged inside. When the tool changing manipulator (7) moves toward the machine tool spindle (4), the gear (28) meshes with the rack (29). A lock tongue (30) is slidably connected inside the adjusting slide block (13). A lock tongue spring (31) is arranged between the lock tongue (30) and the adjusting slide block (13). The tool changing manipulator (7) is provided with a ratchet (32). One end of the lock tongue (30) extends to the outside of the adjusting slide block (13) and contacts with the ratchet (32). A control rod (33) is also hinged on the adjusting slide block (13). A torsion spring is arranged at the hinge between the control rod (33) and the adjusting slide block (13). One end of the control rod (33) contacts with the lock tongue (30).

4. A CNC machining center for molds according to claim 3, characterized in that: A lifting block (34) is provided on one side of the adjusting slider (13) close to the claw (8). When the gear (28) controls the rack 1 (27) and further controls the unlocking slider (17) to move in a direction away from the claw (8), the lifting block (34) contacts the connecting rod (25), and the connecting rod (25) rotates.

5. A CNC machining center for molds according to claim 2, characterized in that: There is a gap between one side of the pressure slider (12) and the inner wall of the tool changing robot (7), the gap width is A, and A is ≤ 0.05 mm. When the adjustment slider (13) moves in the direction of the clamping claw (8), the tool squeezes the pressure slider (12), and at this time, one side of the pressure slider (12) contacts the inner wall of the tool changing robot (7).

6. A CNC machining center for molds according to claim 2, characterized in that: A baffle (35) is slidably connected to the tool changing manipulator (7), and the baffle (35) is also fixedly connected to the pressure slider (12). The baffle (35) is arc-shaped, and the surface of the baffle (35) is in contact with the surface of the tool changing manipulator (7).

7. A CNC machining center for molds according to claim 3, characterized in that: A smooth surface (36) is provided on the second rack (29). When the tool changing manipulator (7) moves to the end toward the main shaft, the gear (28) is located on one side of the smooth surface (36). At this time, the plane of the adjusting slider (13) away from the clamping claw (8) is in contact with the inner wall of the tool changing manipulator (7).

8. The CNC machining center for molds according to claim 1, characterized in that: The tool changing manipulator (7) is provided with three circular holes (37), and the three circular holes (37) are evenly and equidistantly arranged on the tool changing manipulator (7).

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