Bridge type five-axis linkage milling machine

Abstract

The invention relates to the technical field of milling, in particular to a bridge type five-axis linkage milling machine which comprises a machine body, a workbench and a driving frame and further comprises a main shaft box, a shell, an output main shaft, a pneumatic pull rod, a lifting assembly, a cutter handle, a cutter and a side pressing assembly, the main shaft box is connected to the driving frame, and the shell and the output main shaft are both connected to the lower end of the main shaft box; the pneumatic pull rod is connected to the top of an inner cavity of the output main shaft, the lifting assembly is connected to the lower end of the pneumatic pull rod, the cutter handle is connected to the lower end of the lifting assembly, the cutter is connected to the lower end of the cutter handle, and the side pressing assembly is connected to the cutter handle. The clamping position of the cutter handle on the cutter in the radial direction is increased, the clamping length of the cutter handle on the cutter in the axial direction is increased, the side pressing assembly forms a second supporting point capable of sliding in the axial direction of the cutter handle, and then the purpose of avoiding a workpiece when a chute is machined is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of milling, in particular to a bridge-type five-axis linkage milling machine. Background Art

[0002] A bridge-type five-axis linkage milling machine is a CNC machining machine that fixes a crossbeam on columns on both sides to form a stable bridge-type structure. The bridge-type five-axis linkage milling machine has five coordinate systems, namely the three linear coordinate axes X, Y, and Z for controlling the tool and the two rotary coordinate axes A and C for operating the workpiece. The five coordinate axes move synchronously and coordinately under the control of the CNC system, and can perform high-precision processing on multiple side walls of the workpiece. For example, when a bevel groove is opened on the surface of the workpiece, the two rotary coordinate axes A and C for operating the workpiece can process the processing end of the workpiece toward the upper side. When the bevel groove is opened on the inner wall of the workpiece, the workpiece needs to be tilted so that the groove to be processed is vertical. At this time, the tool and the workpiece are fitted for processing. However, during the processing, in order to ensure the adaptability to tools of different sizes, the diameter of the tool holder will be set larger. As a result, when processing the bevel groove on the inner wall of the workpiece, the tool holder will avoid the workpiece, resulting in the tool being unable to reach the required processing depth requirement (such as Figure 1 As shown), which in turn affects the processing effect.

[0003] In response to the above problems, some solutions have been proposed in the prior art. For example, by extending the tool, a safe processing distance is maintained between the tool holder and the workpiece when processing the inclined groove on the inner wall of the workpiece. However, during the rough processing of the workpiece, the tool feed rate is large, which leads to rapid wear of the tool. Although the gap between the tool holder and the workpiece can be increased by extending the tool design, the cost of the tool will increase. In the environment of roughing the workpiece, the large amount of wear will lead to an increase in the cost of replacing the tool, thereby increasing the production cost. At the same time, since the rigidity of the tool is inversely proportional to the length, when the tool is extended, its bending resistance is reduced, resulting in the tool being affected by the resistance in the cutting process during processing, and the tool is prone to vibration, which in turn affects the processing effect of the workpiece.

[0004] Therefore, a bridge-type five-axis linkage milling machine is proposed. Summary of the Invention

[0005] The purpose of the present invention is to provide a bridge-type five-axis linkage milling machine, which solves the problem that the tool holder is prone to contact with the workpiece when machining the inner wall bevel groove of the workpiece, thereby causing damage to the workpiece and affecting product quality, by improving the clamping position of the tool holder on the radial direction of the tool holder, extending the clamping length of the tool holder on the axial direction of the tool holder, and making the side pressure component form a second support point that can slide in the axial direction of the tool holder. The tool holder can avoid the workpiece when machining the inner wall bevel groove, thereby ensuring the machining stability.

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

[0007] A bridge-type five-axis linkage milling machine comprises a bed, a worktable and a drive frame, the worktable is connected to the middle part of the bed, the drive frame is connected to the upper side of the bed, and also comprises a spindle box, an outer shell, an output spindle, a pneumatic pull rod, a lifting assembly, a tool holder, a tool and a side pressure assembly, the spindle box is connected to the drive frame, the outer shell and the output spindle are both connected to the lower end of the spindle box, and the outer shell is arranged on the outer periphery of the output spindle, the pneumatic pull rod is connected to the top of the output spindle inner cavity, the lifting assembly is connected to the lower end of the pneumatic pull rod, the tool holder is connected to the lower end of the lifting assembly, the tool is connected to the lower end of the tool holder, the side pressure assembly is connected to the tool holder, the tool holder forms a clamping surface on the tool surface, and the side pressure assembly is attached to the bottom of the clamping surface. When processing the bevel groove, the pneumatic pull rod drives the side pressure assembly to move upward through the lifting assembly and pressurizes the end of the clamping surface.

[0008] Through the above scheme, the clamping position of the tool holder in the radial direction of the tool is improved, thereby avoiding the workpiece and ensuring stability when processing the inclined groove on the inner wall of the workpiece. By extending the axial length of the tool holder in the tool, the stability of the tool holder clamping the tool is improved, thereby achieving the purpose of facilitating the processing of the workpiece.

[0009] Preferably, the output main shaft includes a shaft rod, an upper sliding cavity, a lower sliding cavity, a locking sleeve and a limit cylinder. The shaft rod is connected to the lower end of the main shaft box, and the shaft rod is rotatably connected to the outer shell. The upper sliding cavity and the lower sliding cavity are successively opened inside the shaft rod from top to bottom. The locking sleeve and the limit cylinder are respectively connected to the upper and lower sides of the lower sliding cavity. The inner diameter value of the upper sliding cavity is larger than the inner diameter value of the lower sliding cavity, thereby facilitating the segmented adjustment of the lifting assembly.

[0010] Preferably, the lifting assembly includes an adjusting disk, a pulling disk, a main clamp and a secondary clamp, the adjusting disk is connected to the lower end of the pneumatic pull rod, and the adjusting disk is slidingly connected to the upper sliding cavity, the pulling disk is connected to the lower end of the adjusting disk, the main clamp is connected to the lower end of the pulling disk, the inner wall of the locking sleeve is trumpet-shaped with the large end facing downward, the main clamp is arranged in the inner wall of the locking sleeve, the main clamp is inclined in the initial state, and the secondary clamp is connected to the outer edge of the lower end of the pulling disk.

[0011] Through the above solution, the main clamping jaws are arranged in the inner wall of the locking sleeve, and when the pulling disk drives the main clamping jaws to move upward, the inclined main clamping jaws will be limited by the locking sleeve and begin to close together to achieve clamping of the tool handle.

[0012] Preferably, the pulling disk includes a disk body, a chamber, a spring and a slider. The disk body is magnetically adsorbed on the lower side of the adjusting disk, and the disk body is slidingly connected to the lower sliding cavity. The chamber is opened on the front and back sides of the disk body. The spring is connected in the chamber. The slider is connected to the other end of the spring. Notches are opened on both sides of the bottom of the upper sliding cavity. When the disk body moves up to the specified position, the slider is engaged with the notch.

[0013] Through the above solution, when the disc body moves up to the specified position, the slider is engaged with the notch, thereby realizing the separation of the disc body and the adjustment disc, so that the adjustment disc can independently adjust the position of the side pressure assembly.

[0014] Preferably, the top of the slider is connected to an inclined plate, and the inclined plate passes through the top of the disk body. A rectangular groove is opened on the lower side of the adjustment disk, and the rectangular groove pushes the inclined plate to slide inward when the adjustment disk moves downward.

[0015] Through the above solution, when the lower end surface of the adjustment disk is in contact with the upper end surface of the disk body, the inclined plate slides inward, thereby releasing the disk body lock and adjusting the position of the disk body.

[0016] Preferably, the tool handle includes a handle sleeve, a collet and a sleeve, the handle sleeve is connected to the lower side of the main clamp, the collet is connected to the inner cavity of the handle sleeve, the sleeve is threadedly connected to the outer side of the handle sleeve, the lower end of the collet is connected to a splint, and the tool is arranged in the middle of the collet.

[0017] Through the above solution, the lower end array of the collet is connected with the clamping plate, thereby increasing the clamping area of ​​the tool and ensuring the stability of the tool operation.

[0018] Preferably, the side pressure assembly includes a pressure plate and a ring, the pressure plate passes through the sleeve from top to bottom, the ring is connected to the top of the pressure plate, the pressure plate is L-shaped, the side of the pressure plate that fits the splint is wavy, and the outer side of the splint is inclined.

[0019] Through the above solution, the side of the pressure plate that fits the splint is wavy, which effectively reduces the friction when the pressure plate slides on the splint surface, making it easier for the pressure plate to slide, and the chamfered setting makes it easier for the pressure plate to fit the splint when installing the sleeve.

[0020] Preferably, sensors are connected to the front and rear sides of the lower end surface of the shell, the lower end of the clamping plate is provided with a chamfer, and the upper side of the lower sliding cavity is provided with a chamfer.

[0021] Through the above solution, the chamfered setting makes it easy for the pressure plate to smoothly transition to the outer wall of the splint and fit on the outer wall of the splint when installing the sleeve, thereby achieving the purpose of easy assembly.

[0022] Preferably, a limiting groove is provided inside the shaft rod, and the auxiliary clamp extends through the limiting groove to the lower side of the ring. A bending portion is provided on the lower side of the auxiliary clamp, and the limiting groove is connected to a limiting strip on the side away from the limiting cylinder. When the adjusting disk moves upward, the auxiliary clamp is driven to fit against the side wall of the sleeve.

[0023] Through the above solution, when the adjusting disk moves upward, the auxiliary clamping jaws are fitted against the side wall of the sleeve, thereby achieving further position limiting of the sleeve.

[0024] Preferably, a support bar is connected to a side of the limiting groove close to the limiting cylinder, and the projection distance between adjacent end faces of the limiting bar and the support bar in a front view is equal to the thickness of the auxiliary clamping jaw.

[0025] Through the above scheme, the projection distance between the adjacent end faces of the limit bar and the support bar is equal to the thickness value of the auxiliary clamp, which makes it easy to limit the auxiliary clamp so that the auxiliary clamp fits on the outer surface of the sleeve, thereby achieving the purpose of improving the positioning effect of the tool handle and effectively improving the stability of the tool handle. At the same time, a bending portion is provided on the lower side of the auxiliary clamp, and the lever point of the auxiliary clamp is located on the lower side, so that the force arm on the upper side of the auxiliary clamp is greater than the force arm on the lower side, thereby further improving the positioning effect of the tool handle.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] 1. The present invention solves the problem that when machining the bevel groove on the inner wall of the workpiece, the tool holder is easily in contact with the workpiece, thereby causing damage to the workpiece and affecting product quality. By setting the tool holder, the clamping plate forms a slender clamping surface on the surface of the tool, thereby increasing the height of the sleeve on the tool surface, and the pressure plate fits on the side wall of the clamping plate, thereby assisting the tool holder in clamping the tool, effectively ensuring the stability of the tool during machining. When machining the bevel groove, the pneumatic pull rod raises the position of the pressure plate, thereby avoiding the workpiece and ensuring the machining effect of the workpiece.

[0028] 2. By setting up a side pressure component, when the pneumatic pull rod drives the adjusting disk to move upward, the auxiliary clamp will be vertically attached to the outer wall of the sleeve, so that the auxiliary clamp forms another limiting point for the tool holder in addition to the limiting cylinder, which effectively improves the stability of the tool holder during processing and ensures the processing accuracy of the workpiece. On the other hand, the bending part of the auxiliary clamp is set in the middle and lower side. When the auxiliary clamp applies pressure to the sleeve, the smaller pressure on the upper side of the auxiliary clamp can be amplified to the lower side of the auxiliary clamp, so that the lower side of the auxiliary clamp is tightly attached to the outer wall of the sleeve, thereby improving the positioning effect of the tool holder and achieving the purpose of ensuring the processing effect of the workpiece.

[0029] 3. By setting up a lifting assembly, when clamping the tool, the adjusting disk will drive the pulling disk to move upward, and then drive the slider to move to the chamfer of the lower cavity. At this time, the spring pushes the slider to move outward and pushes the disk body to separate from the adjusting disk, making it easier for the adjusting disk to adjust the auxiliary clamp separately. At the same time, the spring pushes the slider to fit on the chamfer of the lower cavity, and then the disk body moves upward along the lower cavity. The pulling force of the disk body on the main clamp makes the tool fit tightly against the inner wall of the limit cylinder, effectively improving the fixing effect of the tool handle. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the state during processing by the prior art;

[0031] Figure 2 It is a schematic structural diagram of the present invention as a whole;

[0032] Figure 3 For the present invention Figure 2 A is an enlarged schematic diagram;

[0033] Figure 4 This is a schematic structural diagram of the output spindle portion of the present invention;

[0034] Figure 5 It is a structural schematic diagram of the pulling disc portion of the present invention;

[0035] Figure 6 It is a structural schematic diagram of the handle portion of the present invention;

[0036] Figure 7 Schematic diagram of the structure of the auxiliary clamping jaw part of the present invention;

[0037] Figure 8 This is a schematic diagram of the state of the side pressure assembly of the present invention when it moves upward.

[0038] Figure: 1, bed; 2, worktable; 3, drive frame; 4, spindle box; 5, housing; 6, output spindle; 601, shaft; 6011, limit groove; 6012, limit bar; 6013, support bar; 602, upper slide cavity; 6021, notch; 603, lower slide cavity; 604, locking sleeve; 605, limit cylinder; 7, pneumatic pull rod; 8, lifting assembly; 801, adjustment plate; 8011, rectangular groove ;802, pulling disk;8021, disk body;8022, chamber;8023, spring;8024, slider;80241, inclined plate;803, main clamp;804, auxiliary clamp;9, tool handle;901, handle sleeve;902, collet;9021, clamp;903, sleeve;10, tool;11, side pressure assembly;1101, pressure plate;1102, collar;12, sensor;13, switch. DETAILED DESCRIPTION

[0039] The following, in conjunction with the accompanying drawings of the embodiments of the present invention, clearly and completely describes the technical solutions of the embodiments of the present invention, making its working state and structural features more detailed. Obviously, the embodiments described are only partial embodiments of the present invention and are not complete embodiments. Based on the embodiments of the present invention, other embodiments obtained by ordinary technicians in this field without making any creative ideas are all within the scope of protection of the present invention.

[0040] See also Figures 2 to 8 The present invention provides a bridge-type five-axis linkage milling machine, and the technical solution is as follows:

[0041] For details, please refer to Figures 2 to 8 A bridge-type five-axis linkage milling machine includes a bed 1, a worktable 2 and a drive frame 3. The worktable 2 is connected to the middle of the bed 1. The workpiece to be machined with a bevel is placed on the surface of the worktable 2. The worktable 2 provides two rotating coordinate axes A and C for operating the workpiece. The drive frame 3 is connected to the upper side of the bed 1 and also includes a spindle box 4, a housing 5, an output spindle 6, a pneumatic pull rod 7, a lifting assembly 8, a tool holder 9, a tool 10 and a side pressure assembly 11. The spindle box 4 is connected to the drive frame 3. The drive frame 3 provides three linear coordinate axes X, Y and Z for the position of the spindle box 4. The housing 5 and the output spindle 6 are both connected to the lower end of the spindle box 4. The output spindle 6 is fixedly connected to the output end of the spindle box 4. It can drive the output spindle 6 to rotate, and the outer shell 5 is arranged on the outer periphery of the output spindle 6, the outer shell 5 is fixedly connected to the spindle box 4, and the outer shell 5 is rotatably connected to the output spindle 6, the pneumatic pull rod 7 is connected to the top of the inner cavity of the output spindle 6, the lifting assembly 8 is connected to the lower end of the pneumatic pull rod 7, the tool handle 9 is connected to the lower end of the lifting assembly 8, the tool 10 is connected to the lower end of the tool handle 9, and the side pressure assembly 11 is connected to the tool handle 9. The tool 10 includes a handle and a blade. The tool handle 9 is clamped in the handle, and the blade is used for processing the workpiece. The tool handle 9 forms a clamping surface on the handle, and the side pressure assembly 11 is attached to the bottom of the clamping surface. When processing the bevel groove, the pneumatic pull rod 7 drives the side pressure assembly 11 to move upward through the lifting assembly 8 and pressurizes the end of the clamping surface.

[0042] By raising the clamping position of the tool holder 9 in the radial direction of the tool 10, the tool holder 9 is allowed to avoid the workpiece when machining the bevel groove, thereby ensuring stability when machining the bevel groove on the inner wall of the workpiece. By extending the clamping length of the tool holder 9 in the axial direction of the tool 10, the stability of the tool holder 9 clamping the tool 10 is improved, thereby achieving the purpose of facilitating the machining of the workpiece. At the same time, the side pressure component 11 is pressed on the clamping surface, thereby assisting the tool holder 9 in clamping the tool 10 and improving the stability of the tool 10 during machining.

[0043] As an embodiment of the present invention, refer to Figure 1 、 Figure 4 、 Figure 5 and Figure 8, a button is connected to the spindle box 4 for controlling the start of the pneumatic pull rod 7 for clamping the tool holder 9. The output spindle 6 includes a shaft 601, an upper sliding cavity 602, a lower sliding cavity 603, a locking sleeve 604 and a limiting cylinder 605. The shaft 601 is connected to the output end of the spindle box 4. The spindle box 4 can drive the shaft 601 to rotate, and the shaft 601 is rotatably connected to the housing 5. The upper sliding cavity 602 and the lower sliding cavity 603 are sequentially opened inside the shaft 601 from top to bottom. The locking sleeve 604 and the limiting cylinder 605 are respectively connected to the upper and lower sides of the lower sliding cavity 603. A stop block is connected to the lower side of the limiting cylinder 605. The inner diameter value of the upper sliding cavity 602 is larger than the inner diameter value of the lower sliding cavity 603. The inner diameter of the upper sliding cavity 602 is larger than that of the lower sliding cavity 603. A switch 13 is connected, and the switch 13 is used to reduce the spindle speed. The lifting component 8 includes an adjusting disk 801, a pulling disk 802, a main clamping jaw 803 and an auxiliary clamping jaw 804. The adjusting disk 801 is connected to the lower end of the pneumatic pull rod 7, and the adjusting disk 801 is slidably connected to the upper sliding cavity 602. When the adjusting disk 801 moves up, it will contact the switch 13, thereby reducing the spindle speed to ensure the stability of the tool 10 when processing the bevel groove. The inner diameter value of the adjusting disk 801 is equal to the inner diameter value of the upper sliding cavity 602. The pulling disk 802 is connected to the lower end of the adjusting disk 801, and the main clamping jaw 803 is connected to the lower end of the pulling disk 802. The inner wall of the locking sleeve 604 is a trumpet shape with the large end facing the lower side. The main clamping jaw 803 is arranged on the locking sleeve 60 4, in the initial state, the main clamping jaw 803 is inclined, and the main clamping jaw 803 is elastically connected to the pulling disk 802. When the pulling disk 802 moves up, the main clamping jaw 803 is driven to fit the inner wall of the locking sleeve 604, thereby bringing the main clamping jaw 803 together to clamp the tool handle 9. The auxiliary clamping jaw 804 is connected to the outer edge of the lower end of the pulling disk 802, and the connection between the auxiliary clamping jaw 804 and the pulling disk 802 is elastic. The pulling disk 802 includes a disk body 8021, a chamber 8022, a spring 8023 and a slider 8024. The disk body 8021 is magnetically adsorbed on the lower side of the adjusting disk 801, and the disk body 8021 is slidably connected to the downward cavity 603. The inner diameter value of the disk body 8021 is consistent with the inner diameter value of the downward cavity 603. The diameter values ​​are equal, and the chamber 8022 is opened on the front and back sides of the disk body 8021. One end of the spring 8023 is connected to the position near the inner side of the chamber 8022, and the slider 8024 is connected to the other end of the spring 8023. In the initial state, the spring 8023 is in a contracted state, and slots 6021 are opened on both sides of the bottom of the upper sliding cavity 602. When the disk body 8021 moves up to the specified position, the slider 8024 is engaged with the slot 6021, and the top of the slider 8024 is connected to the inclined plate 80241, and the inclined plate 80241 passes through the top of the disk body 8021. A rectangular groove 8011 is opened on the lower side of the adjusting disk 801. When the adjusting disk 801 moves down, the rectangular groove 8011 pushes the inclined plate 80241 to slide inward.

[0044] By setting the output spindle 6, the lifting component 8 is connected to the inside of the output spindle 6 and will rotate synchronously with the output spindle 6. When the tool holder 9 is clamped, the pneumatic pull rod 7 moves up to drive the adjusting disk 801 to move up. At this time, the pulling disk 802 and the adjusting disk 801 are magnetically attracted, which will drive the pulling disk 802 to move up. When the slider 8024 moves up to the upper sliding cavity 602, the outer end of the slider 8024 loses its limit. At this time, the spring 8023 pushes the slider 8024 to move outward, and the movement of the slider 8024 drives the inclined plate 80241 to move, so that The adjusting disk 801 is separated from the disk body 8021, and the slider 8024 is clamped in the slot 6021, so that the position of the disk body 8021 is fixed. At the same time, when the disk body 8021 moves upward, the main clamping jaw 803 is driven to move upward, and the main clamping jaw 803 moves upward to contact the inner wall of the locking sleeve 604, and then closes together, thereby fixing the tool handle 9. When the adjusting disk 801 moves downward, the side wall of the rectangular slot 8011 squeezes the inclined plate 80241, causing the inclined plate 80241 to move inward, thereby releasing the lock on the disk body 8021.

[0045] As an embodiment of the present invention, refer to Figure 6 、 Figure 7 and Figure 8The tool handle 9 includes a handle sleeve 901, a collet 902 and a sleeve 903. The handle sleeve 901 is connected to the lower side of the main clamping jaw 803. The outer wall of the handle sleeve 901 fits the inner wall of the limiting cylinder 605, and the outer wall of the handle sleeve 901 is inclined, thereby effectively increasing the contact area between the handle sleeve 901 and the limiting cylinder 605, and improving the stability of the fixation of the tool handle 9. The stop block is adapted to be clamped with the handle sleeve 901, and the rotation of the output spindle 6 can drive the tool handle 9 to rotate. The collet 902 is connected to the inner cavity of the handle sleeve 901, and the side wall of the collet 902 is provided with an expansion joint. The tool 10 can be clamped by the cooperation of the collet 902 and the handle sleeve 901. The sleeve 903 is threadedly connected to the outside of the handle sleeve 901. By rotating the sleeve 903, the collet 902 moves toward the inner cavity of the handle sleeve 901, and squeezes the collet 902 through the inner cavity of the handle sleeve 901, so that the expansion gap of the collet 902 contracts and locks the tool 10. The lower end of the collet 902 is connected to the clamping plate 9021 in an array. When clamping, the handle of the tool 10 is set at the clamping plate 9021, thereby reducing the radial length of the tool 10 when clamping compared to the collet 902. The tool 10 is set in the middle of the collet 902. The side pressure assembly 11 includes a pressure plate 1101 and a collar 1102. The pressure plate 1101 passes through the sleeve 903 from top to bottom. There are multiple pressure plates 1101 connected in an array. The collar 1102 is fixedly connected to the top of the pressure plate 1101. When the collar 1102 moves up, it can drive the pressure plate 1101 to move up. The pressure plate 1101 is The L-shaped, wave-shaped side of the pressure plate 1101 that fits against the splint 9021 effectively reduces the resistance of the pressure plate 1101 to sliding on the surface of the splint 9021. At the same time, the wave-shaped pressure plate 1101 can form multiple clamping points on the surface of the splint 9021, thereby improving the locking effect of the pressure plate 1101 on the splint 9021. The upper side of the outer wall of the splint 9021 is inclined outward. During the upward movement of the pressure plate 1101, the pressure plate 1101 will strengthen the clamping strength of the splint 9021. Sensors 12 are connected to the front and rear sides of the lower end face of the shell 5. The sensor 12 is used to sense the distance from the workpiece and start the pneumatic pull rod 7 when the distance from the workpiece reaches a specified value, so that the pneumatic pull rod 7 moves further upward. The lower end of the splint 9021 is provided with a chamfer. When the sleeve 903 is sleeved on the handle sleeve 901, it is convenient for the pressure plate 1101 to slide to the outer wall of the clamping plate 9021. A chamfer is provided on the upper side of the lower cavity 603, and a limiting groove 6011 is provided in the shaft rod 601. The auxiliary clamping jaw 804 passes through the limiting groove 6011 and extends to the lower side of the collar 1102. A clamping block is connected to the lower side of the auxiliary clamping jaw 804. The height of the clamping block is greater than the distance the collar 1102 moves upward, thereby making the clamping block of the auxiliary clamping jaw 804 always keep in contact with the sleeve 903, thereby improving the fixing effect of the tool handle 9. A bending portion is provided on the lower side of the auxiliary clamping jaw 804, and the limiting groove 6011 is connected to the limiting strip 6012 on the side away from the limiting cylinder 605. When the adjusting disk 801 moves upward, the auxiliary clamping jaw 804 is in contact with the side wall of the sleeve 903.The side of the limiting groove 6011 close to the limiting cylinder 605 is connected to the support bar 6013. The projection distance between the adjacent end faces of the limiting bar 6012 and the support bar 6013 in the front view is equal to the thickness of the auxiliary clamping jaw 804.

[0046] By setting the side pressure assembly 11, after the sleeve 903 is installed on the outer wall of the handle sleeve 901, the pressure plate 1101 forms a second fixing point for the handle of the tool 10 on the outer wall of the clamping plate 9021, which effectively improves the stability of the tool 10 during processing. At the same time, when the pneumatic pull rod 7 drives the adjustment disk 801 to move upward, it will drive the auxiliary clamping jaw 804 to move upward. During the process of the auxiliary clamping jaw 804 moving upward, it will contact the limit bar 6012, and the auxiliary clamping jaw 804 will be vertical and fit on the sleeve 9. 03, at this time, the auxiliary clamp 804 forms a second limiting point for the tool handle 9, which effectively improves the stability of the tool handle 9 during processing, thereby achieving the purpose of improving the processing progress. At the same time, when the auxiliary clamp 804 is in a vertical shape, the two sides of the auxiliary clamp 804 are respectively attached to the limiting strip 6012 and the support strip 6013, thereby ensuring that the auxiliary clamp 804 can be stably attached to the outer wall of the sleeve 903 when rotating, thereby achieving the purpose of ensuring that the auxiliary clamp 804 stably limits the tool handle 9.

[0047] The tool handle 9 forms an elongated clamping surface on the surface of the tool 10 through the clamping plate 9021, and forms a secondary clamping point on the clamping surface through the side pressure component 11. When processing other parts, the side pressure component 11 is attached to the lower end of the clamping surface to provide stable support for the tool 10. When processing the bevel, the pneumatic pull rod 7 drives the side pressure component 11 to move upward and pressurize the clamping surface to avoid the workpiece, thereby facilitating the opening of the bevel.

[0048] Specifically: Before processing, the tool 10 is placed in the inner cavity of the collet 902, and the clamping plate 9021 is attached to the upper side of the shank of the tool 10. At this time, the clamping plate 9021 forms a clamping surface on the surface of the tool 10. By tightening the threads of the sleeve 903 and the shank sleeve 901, the collet 902 locks the tool 10. At this time, the side pressure component 11 is attached to the outer wall of the clamping plate 9021;

[0049] When installing the tool 10, align the tool 10 with the inner cavity of the output spindle 6, press the button, and the pneumatic pull rod 7 drives the pulling plate 802 to move up through the adjusting plate 801, and then drives the main clamping jaw 803 to move up. When the main clamping jaw 803 moves up, the outer wall contacts the locking sleeve 604 and begins to close together, lifting the handle sleeve 901 so that the handle sleeve 901 fits the inner wall of the limiting cylinder 605, forming a stable support for the tool handle 9. When the pulling plate 802 moves up to the upper sliding cavity 602, the slider 8024 loses its limit The spring 8023 pushes the slider 8024 to move upward along the chamfer on the upper side of the lower cavity 603 and extend into the notch 6021, thereby locking the position of the pulling disk 802. The pneumatic pull rod 7 stops outputting. At the same time, the upward movement of the adjusting disk 801 drives the auxiliary clamping jaw 804 to move upward. The auxiliary clamping jaw 804 is limited by the limiting action of the limiting bar 6012 to form a vertical shape, fits against the side wall of the sleeve 903, and forms a second limiting point for the knife handle 9, effectively improving the stability of the knife handle 9.

[0050] During the machining process, the pressing plate 1101 is attached to the lower side of the outer wall of the clamping plate 9021, thereby forming a support in the middle of the handle of the tool 10, effectively improving the stability of the tool 10 during the machining process:

[0051] When processing the bevel, when the sensor 12 senses that the distance from the workpiece reaches a specified value, the pneumatic pull rod 7 is started, and the pneumatic pull rod 7 drives the auxiliary clamp 804 to move upward through the adjustment disk 801. After the auxiliary clamp 804 is vertical, its lower end is located on the lower side of the ring 1102, and then when the auxiliary clamp 804 moves upward, it can drive the ring 1102 to move upward, and then drive the pressure plate 1101 to move upward. After the pressure plate 1101 moves upward, the diameter of the clamping surface in the middle of the tool 10 is reduced, thereby achieving avoidance of the workpiece and effectively improving the processable depth of the bevel.

[0052] Although the embodiments of the present invention have been described, it is possible for those skilled in the art to change and modify the embodiments to obtain other effects with an understanding of the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A bridge-type five-axis linkage milling machine, comprising a bed (1), a workbench (2) and a drive frame (3), wherein the workbench (2) is connected to the middle of the bed (1), and the drive frame (3) is connected to the upper side of the bed (1), characterized in that: The machine tool further comprises a spindle box (4), a housing (5), an output spindle (6), a pneumatic pull rod (7), a lifting assembly (8), a tool holder (9), a tool (10) and a side pressure assembly (11), wherein the spindle box (4) is connected to the driving frame (3), the housing (5) and the output spindle (6) are both connected to the lower end of the spindle box (4), and the housing (5) is arranged on the periphery of the output spindle (6), the pneumatic pull rod (7) is connected to the top of the inner cavity of the output spindle (6), and the lifting assembly (8) is connected to the upper end of the driving frame (3). ) is connected to the lower end of the pneumatic pull rod (7), the tool handle (9) is connected to the lower end of the lifting assembly (8), the tool (10) is connected to the lower end of the tool handle (9), the side pressure assembly (11) is connected to the tool handle (9), the tool handle (9) forms a clamping surface on the surface of the tool (10), and the side pressure assembly (11) is attached to the bottom of the clamping surface. When processing the inclined groove, the pneumatic pull rod (7) drives the side pressure assembly (11) to move upward through the lifting assembly (8) and pressurizes the end of the clamping surface.

2. The bridge-type five-axis linkage milling machine according to claim 1, characterized in that: The output main shaft (6) includes a shaft (601), an upper sliding cavity (602), a lower sliding cavity (603), a locking sleeve (604) and a limiting cylinder (605); the shaft (601) is connected to the lower end of the main shaft box (4); the upper sliding cavity (602) and the lower sliding cavity (603) are sequentially opened inside the shaft (601) from top to bottom; the locking sleeve (604) and the limiting cylinder (605) are respectively connected to the upper and lower sides of the lower sliding cavity (603); the inner diameter of the upper sliding cavity (602) is greater than the inner diameter of the lower sliding cavity (603).

3. The bridge-type five-axis linkage milling machine according to claim 2, characterized in that: The lifting assembly (8) includes an adjusting disk (801), a pulling disk (802), a main clamping jaw (803) and a secondary clamping jaw (804), wherein the adjusting disk (801) is connected to the lower end of the pneumatic pull rod (7), and the adjusting disk (801) is slidably connected to the upper sliding cavity (602), the pulling disk (802) is connected to the lower end of the adjusting disk (801), the main clamping jaw (803) is connected to the lower end of the pulling disk (802), the inner wall of the locking sleeve (604) is in the shape of a trumpet with the large end facing downward, the main clamping jaw (803) is arranged in the inner wall of the locking sleeve (604), and in the initial state, the main clamping jaw (803) is inclined, and the secondary clamping jaw (804) is connected to the outer edge of the lower end of the pulling disk (802).

4. The bridge-type five-axis linkage milling machine according to claim 3, characterized in that: The pulling disk (802) includes a disk body (8021), a chamber (8022), a spring (8023) and a slider (8024). The disk body (8021) is magnetically adsorbed on the lower side of the adjusting disk (801), and the disk body (8021) is slidably connected to the lower sliding chamber (603). The chamber (8022) is opened on the front and back sides of the disk body (8021). The spring (8023) is connected in the chamber (8022). The slider (8024) is connected to the other end of the spring (8023). Notches (6021) are opened on both sides of the bottom of the upper sliding chamber (602). When the disk body (8021) moves up to a specified position, the slider (8024) is engaged with the notch (6021).

5. The bridge-type five-axis linkage milling machine according to claim 4, characterized in that: The top of the slider (8024) is connected to an inclined plate (80241) passing through the disc body (8021), and a rectangular groove (8011) is provided on the lower side of the adjustment disc (801). When the adjustment disc (801) moves downward, the rectangular groove (8011) pushes the inclined plate (80241) to slide inward.

6. The bridge-type five-axis linkage milling machine according to claim 3, characterized in that: The knife handle (9) comprises a handle sleeve (901), a collet (902) and a sleeve (903), wherein the handle sleeve (901) is connected to the lower side of the main clamp (803), the collet (902) is connected to the inner cavity of the handle sleeve (901), the sleeve (903) is connected to the outer side of the handle sleeve (901), the lower end of the collet (902) is connected to a clamping plate (9021), and the tool (10) is arranged in the middle of the collet (902).

7. The bridge-type five-axis linkage milling machine according to claim 6, characterized in that: The side pressure assembly (11) includes a pressure plate (1101) and a collar (1102), wherein the pressure plate (1101) passes through the sleeve (903) from top to bottom, and the collar (1102) is connected to the top of the pressure plate (1101), and the pressure plate (1101) is L-shaped, and the side of the pressure plate (1101) that is in contact with the splint (9021) is wavy, and the outer side of the splint (9021) is inclined.

8. The bridge-type five-axis linkage milling machine according to claim 7, characterized in that: Sensors (12) are connected to the front and rear sides of the lower end surface of the housing (5), the lower end of the clamping plate (9021) is provided with a chamfer, and the upper side of the lower cavity (603) is provided with a chamfer.

9. The bridge-type five-axis linkage milling machine according to claim 7, characterized in that: A limiting groove (6011) is provided in the shaft (601), and the auxiliary clamping jaw (804) passes through the limiting groove (6011) and extends to the lower side of the ring (1102). A bending portion is provided on the lower side of the auxiliary clamping jaw (804). The side of the limiting groove (6011) away from the limiting cylinder (605) is connected to the limiting strip (6012). When the adjusting disk (801) moves upward, the auxiliary clamping jaw (804) is driven to fit against the side wall of the sleeve (903).

10. The bridge-type five-axis linkage milling machine according to claim 9, characterized in that: The side of the limiting groove (6011) close to the limiting cylinder (605) is connected to a support bar (6013), and the projection distance between the adjacent surfaces of the limiting bar (6012) and the support bar (6013) in the front view is equal to the thickness of the auxiliary clamp (804).

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