Column type machining center

Abstract

The invention relates to the technical field of tool changing mechanisms, in particular to a stand column type machining center which comprises a rack, a tool magazine, a stand column main shaft and a rotating shaft, tools are installed on the tool magazine and the stand column main shaft, a tool changing arm is arranged on the rotating shaft, and a locking pin and a lifting pin are arranged in the left end and the right end of the tool changing arm. By arranging the rotating disc and the rotating assembly, the rotating assembly drives the rotating disc to rotate by a fixed angle when the ejector pin is ejected out of the ejector groove, so that the locking pin is locked by the convex surface of the rotating disc, and the position of a cutter is locked; after the tool changing arm is reset, the lifting pin shrinks, the rotary table continues to rotate by a fixed angle to the concave surface so as to unlock the tool by the locking pin, and the process is repeated to enable the locking pin to abut against different convex surfaces respectively, so that the situation that after the tool changing arm is used for a long time, the lifting pin repeatedly locks the same point of the locking pin, a friction gap is enlarged, and the tool changing precision is improved is avoided. And therefore, the equipment matching precision and the use safety of the stand column type machining center are ensured.

Description

Technical Field

[0001] This invention relates to the field of tool changing mechanism technology, specifically a column-type machining center. Background Technology

[0002] Machining centers are commonly used parts processing equipment, often used for auxiliary machining such as turning and milling. In the multi-process continuous machining of column-type machining centers, multiple tools are needed to process metal materials. The tool changer is the core component for realizing automatic tool changing. A traditional tool changer consists of a robotic arm body, a power transmission module, locking pins, top pins, and a detection module. When the detection module detects that the next process requires tool changing, it sends a signal to the power transmission module to drive the robotic arm body to rotate 90°. At this time, the locking pins at both ends of the robotic arm body clamp the tools on the tool magazine and the column spindle respectively and move downward to pull out the tools. During the pulling process, the top pin locks the locking pins, thus locking the tools at both ends of the robotic arm body and preventing the tools from being thrown out during tool changing. After the tools are pulled out, the arm rotates 180°, causing the positions of the tools on the tool magazine and the column spindle to be interchanged and moved upward. This causes the top pin to be squeezed, thereby unlocking the locking pin and inserting the tool into the tool magazine and the column spindle, thus completing the tool changing. However, with the improvement of processing efficiency and the increasing demand for multi-tool collaborative machining of complex workpieces, the tool magazine contains a variety of tools, each with different center and weight. This results in some heavier tools experiencing a larger moment of inertia during the rotation of the tool changer arm, which may lead to insufficient clamping force of the tool changer arm and cause the tool to fall off.

[0003] To address the aforementioned problems, existing technologies offer several solutions. For example, patent application CN202510020666.1 provides an automatic knife-locking device. This solution involves providing locking assemblies at both ends of the knife arm body. The locking assemblies include a push rod, a push block that elastically lifts within the knife arm and pushes the push rod towards the knife, and a lifting drive mechanism for raising and lowering the push block. The lifting drive mechanism includes a rotating turntable and a lower plate supported below the turntable. The bottom surface of the lower plate is the unlocking surface. The turntable protrudes downwards to form a lower protrusion, and the outer edge of the lower plate is recessed to form a receiving groove for accommodating the lower protrusion and allowing it to rotate. During the rotation of the lower protrusion, its sidewall and the groove wall of the receiving groove enclose it to form a locking mechanism. The push block, which accommodates elastic reset, moves upward to press the locking groove of the push rod. The locking groove for the push block to enter is formed by the cooperation of the turntable and the lower plate. Then, the push block and the push rod cooperate to lock the tool before tool changing, which avoids the tool falling off during rapid tool changing and improves the strength of the tool arm holding the tool. However, in this design, in order to fix the tool, the outer edge of the locking pin is directly squeezed by the push rod. This causes the contact surface between the locking pin and the push rod to wear and become concave after long-term use. As a result, the gap in the push rod causes the tool to wobble when fixed. This may lead to a decrease in the concentricity of the tool and the column spindle during tool setting, or even tool flying, thus affecting production quality and safety. Summary of the Invention

[0004] The purpose of this invention is to provide a column-type machining center to solve the problem that, during tool changing, the heavy tool experiences a large moment of inertia as the tool changer rotates, which may lead to insufficient clamping force of the tool changer and tool slippage. Furthermore, this invention addresses the problem in existing technologies where the locking pin and push rod repeatedly lock at the same contact point for extended periods, causing increased friction clearance and resulting in wobbling of the push rod when fixing the tool. This can lead to decreased concentricity between the tool and the column spindle during tool setting, or even tool slippage, ultimately damaging the column-type machining center.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A column-type machining center includes a frame, a tool magazine, a column spindle, and a rotating shaft. The tool magazine and the column spindle are installed side-by-side within the frame. The rotating shaft is connected to the frame. Tools are mounted on the tool magazine and the column spindle. A tool changing arm is provided on the rotating shaft. The tool changing arm has tool changing grooves at both ends that mate with the tools. A locking groove and a top groove are formed inside the tool changing arm. The locking groove and the top groove are connected. Locking pins and top pins are provided at both ends of the tool changing arm. The locking pins are elastically connected to the locking grooves. The top pins are elastically connected to the top grooves, and one end of the top pins abuts against the frame. A turntable and a rotating assembly are provided in the top groove. The turntable is concentric with the top groove. The turntable includes a convex surface and a concave surface, which are arranged at intervals on the outer edge of the turntable. The top pin passes through the turntable and is rotatably connected to it. The rotating assembly drives the convex and concave surfaces to alternately abut against the locking pins through the extension and retraction of the top pin.

[0007] As easily understood, a turntable is rotatably connected to the top pin. When the top pin pushes out of the top groove, the rotating assembly drives the turntable to rotate to the convex surface, causing the locking pin to push out of the locking groove, thus locking the tool. This avoids the problem of the tool falling off due to insufficient clamping force of the tool changing arm caused by the large swing inertia moment experienced by the tool during tool changing. While ensuring locking strength, the outer edge of the turntable has two convex and concave surfaces of different diameters arranged at intervals. The rotating assembly drives the turntable to rotate through the elastic force of the top pin, so that the locking pin alternately abuts against different convex and concave surfaces. This prevents only a single convex surface from repeatedly abutting against the locking pin, avoiding the failure to fully utilize the contact surface with the locking pin, thereby reducing the time lost due to the expansion of the friction gap between the two, thus improving the service life and stability of the equipment. This also prevents the locking pin from shaking when locking the tool, and the drive is achieved by the change in the position of the top pin, thereby reducing the need for external power. The structure is simple and effectively reduces the manufacturing cost of the equipment.

[0008] Preferably, the rotating assembly includes a guide groove, a sliding part, and a locking member. The guide groove is a ring-shaped wavy line and is formed on the inner edge surface of the turntable. The lowest point of the guide groove is located in the concave direction, and the highest point of the guide groove is located in the convex direction. One end of the sliding part is rotatably connected to the top pin, and the other end is slidably connected to the guide groove. The locking member is connected to the top pin and the turntable.

[0009] As easily understood, by creating a wavy guide groove on the inner edge of the turntable, the sliding part is positioned within the guide groove path as the top pin slides up and down along the top groove. When the top pin is pressed, the sliding part is at the lowest point of the groove. At this point, the other end of the locking pin, when pressed by the tool, can abut against the concave surface of the turntable. When the top pin pops out of the top groove, the sliding part moves to the highest point of the guide groove. Because the guide groove is wavy, the turntable rotates at a fixed angle during this movement, thus ensuring the sliding part is at the highest point of the guide groove. The convex surface of the turntable then abuts against the locking pin. Repeating this process ensures that the convex surface abutting against the locking pin is different each time the locking pin locks the tool, fully utilizing the contact surface and extending the friction gap between the two. This reduces the time the locking pin wobbles when locking the tool, thereby improving the equipment's lifespan and stability.

[0010] Preferably, the locking member includes an inner wall groove arranged in a circumferential array on the inner wall of the top groove, a fixing block is elastically connected in the inner wall groove, the fixing block abuts against the concave surface, a top plate is provided at the lower end of the top pin, a pin is elastically connected on the top plate, the pin is conical, the pin passes through the inner wall groove and abuts against the fixing block.

[0011] As is easily understood, when the sliding part moves up and down, it is within the guide groove path, which restricts the rotation of the turntable. This causes the top pin to experience stress concentration at the contact point after the convex surface on the turntable comes into contact with the locking pin. After long-term use, the top pin may bend slightly, which changes the concentricity between the turntable and the top groove. Consequently, the locking pin can still slide in the locking groove after contacting the convex surface, reducing the locking strength of the tool changer arm on the tool. As the conical top pin penetrates into the inner wall groove, the fixing block is squeezed out of the inner wall groove by the conical surface of the ejector pin until the fixing block comes into contact with the concave surface. This provides some support for the top pin in the turntable, thus preventing the top pin from bending and deforming due to stress concentration from one direction. This ensures that the locking effect of the locking pin on the tool can still be guaranteed after long-term use.

[0012] Preferably, the guide groove has a phase-changing section at its wavy end, the diameter of which is larger than the wavy diameter of the guide groove, and the phase-changing section is inclined toward the path of the guide groove at the same end.

[0013] It is easy to understand that, in order to prevent the top pin from moving back and forth within a certain path of the guide groove during the sliding motion of the top pin along the top groove, causing the same convex surface to repeatedly abut against the locking pin and resulting in a higher wear rate on the convex surface at that point than on other convex surfaces, a phase-changing part is provided at the upper and lower ends of the wavy shape of the guide groove. This allows the sliding part to enter the phase-changing part after moving to the upper and lower ends of the guide groove. Since the phase-changing parts are all inclined towards the same direction of the guide groove path, the sliding part will only enter the guide groove path on the side closest to the phase-changing part after sliding out of the phase-changing part. This avoids a single convex surface from repeatedly locking the locking pin, thereby increasing the service life of the turntable and ensuring the stability of the tool changing arm after long-term use.

[0014] Preferably, the connection between the convex and concave surfaces is provided with rounded corners, and the locking pin is provided with an inner arc surface at one end near the turntable, the inner arc surface being inclined toward the rotation direction of the turntable.

[0015] It is easy to understand that by using the concentric fit between the rounded corners and the inner arc surface, the friction caused by the sliding between the concave and convex surfaces of the turntable and the inner arc surface during switching is reduced, thereby further improving the service life of the turntable.

[0016] Preferably, a rotating part is rotatably connected to the turntable, a rotating pin is provided on the lower end face of the rotating part, a rotating groove is provided on the upper end face of the turntable, the rotating pin is elastically connected to the rotating groove, the opening end of the inner wall groove is inclined toward the concave surface, and the diameter of the convex surface on the rotating part is larger than the diameter of the inner arc surface.

[0017] As is easily understood, by setting up a rotating part and arranging the inner wall groove inclined towards the concave surface, if a convex surface on the turntable wears down after prolonged use, the fixing block in the inclined inner wall groove will press against the concave surface on the rotating part, thereby driving the rotating part to rotate. This ensures that although the convex surface on the turntable will inevitably wear down after prolonged use, the rotating part will continue to rotate until the convex surface on the rotating part that meets the locking conditions for the locking pin abuts against the locking pin. The friction gap of the convex surface will never widen, causing the tool to wobble, thus ensuring the locking strength of the locking pin for the tool.

[0018] Preferably, the fixing block has an outer arc surface that is inclined toward the rotation direction of the turntable. The outer arc surface slides along the middle of the concave surface and abuts against the rounded corner at the rotation direction of the turntable. The arc length of the concave surface is half the arc length of the rotating groove, and the arc length of the convex surface on the rotating part is equal to the arc length of the rotating groove.

[0019] It is easy to understand that when the fixed block presses against the rotating part and makes it rotate, the convex surface on the rotating part and the contact point with the locking pin will inevitably wear. As the wear gap widens, the fixed block continues to drive the rotating part to rotate, so that the convex surface rotates a certain angle and then contacts the locking pin again. While ensuring the locking strength, the usable area of ​​the convex surface is increased, and by increasing the ratio of the area of ​​the convex surface to the area of ​​the concave surface on the rotating part, the service life of the turntable is further improved.

[0020] The rotating part has a toothed surface on its convex surface, and a wedge is elastically connected to the locking pin. The wedge is inclined toward the rotation direction of the turntable and abuts against the toothed surface.

[0021] As is easily understood, the outer arc surface of the fixed block will wear down during long-term sliding along the concave surface. Since the position of the fixed block is directly related to the rotation angle of the rotating part, the gap caused by wear changes the rotation angle of the rotating part. As a result, the unworn convex surface cannot fully compensate for the locking of the locking pin. By forming a one-way locking structure with the wedge and the tooth surface, the rotating part cannot rotate back due to the tension on the rotating pin after being rotated. This reduces part of the reaction force of the rotating part on the fixed block, thereby reducing the sliding friction between the fixed block and the concave surface. This reduces the wear caused by the relative sliding between the fixed block and the concave surface, and further improves the service life of the turntable.

[0022] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0023] 1. This invention, by setting up a turntable and a rotating assembly, allows the rotating assembly to drive the turntable to rotate at a fixed angle when the top pin pops out of the top groove, so that the locking pin is locked by the convex surface of the turntable, thereby locking the position of the tool. When the tool changing arm resets, the top pin retracts, and the rotating assembly drives the turntable to continue rotating at a fixed angle to the concave surface, thereby releasing the locking pin from locking the tool. This avoids the problem of increased friction gap caused by repeated locking of the top pin to the same point of the locking pin after long-term use of the tool changing arm, and the problem of underutilization of other surfaces of the top pin, which would cause the tool to wobble when locked. This ensures the equipment matching accuracy and safety of the column-type machining center.

[0024] 2. By setting up a phase-changing part, the sliding part will enter the phase-changing part after moving to the upper and lower ends of the guide groove. Since the phase-changing parts are all inclined towards the guide groove path in the same direction, the sliding part will only enter the guide groove path on the side close to the phase-changing part after sliding out of the phase-changing part. This avoids the possibility of a single convex surface locking the locking pin repeatedly, thereby improving the service life of the turntable.

[0025] 3. By setting a rotating part and arranging the inner wall groove inclined towards the concave surface, if the convex surface on the turntable wears down after long-term use, the fixing block in the inner wall groove will drive the rotating part to rotate until the convex surface on the rotating part that meets the locking conditions of the locking pin abuts against the locking pin. This ensures that the turntable will not cause the tool to wobble due to the increased friction gap of the convex surface after long-term use, and the locking strength of the locking pin on the tool is still guaranteed.

[0026] 4. By setting toothed surfaces and wedges, the present invention provides a one-way locking structure composed of toothed surfaces and wedges, which shares part of the reaction force of the rotating part on the fixed block, thereby reducing the sliding friction between the fixed block and the concave surface, thus reducing the friction loss caused by the relative sliding between the fixed block and the concave surface, thereby improving the service life of the fixed block and the turntable. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the column-type machining center of the present invention;

[0028] Figure 2 A schematic diagram of the structure for changing tools in the tool changing arm;

[0029] Figure 3 This is a full 3D cross-sectional view of the rotating assembly when the top pin abuts against the open end face of the rotating shaft;

[0030] Figure 4 for Figure 2 Full cross-section view at point AA;

[0031] Figure 5 This is a schematic diagram of the structural state of the tool changer arm in its initial position.

[0032] Figure 6 A full sectional view of the structure of the turntable and the top pin assembly;

[0033] Figure 7 A schematic diagram showing the arrangement direction of the rotating parts inside the guide groove;

[0034] Figure 8 for Figure 2 Full sectional view of the structure at point BB;

[0035] Figure 9 A schematic diagram showing the structural position of the fixing block when the top pin abuts against the open end face of the rotating shaft;

[0036] Figure 10 for Figure 8 Enlarged schematic diagram of the structure at point C.

[0037] In the diagram: 1. Frame; 101. Tool magazine; 102. Column spindle; 103. Rotating shaft; 104. Tool changing arm; 1041. Tool changing groove; 1042. Locking groove; 105. Top groove; 106. Locking pin; 1061. Inner arc surface; 1062. Wedge block; 107. Top pin; 108. Turntable; 1081. Rotating part; 1082. Rotating pin; 1083. Rotating groove; 2. Rotating assembly; 201. Convex surface; 2011. Tooth surface; 202. Concave surface; 2021. Rounded corner; 203. Guide groove; 2031. Transformation part; 204. Sliding part; 3. Locking element; 301. Inner wall groove; 302. Fixing block; 3021. Outer arc surface; 303. Top plate; 3031. Ejector pin. Detailed Implementation

[0038] This invention provides a column-type machining center, the technical solution of which is as follows:

[0039] Please see Figures 1 to 10 A column-type machining center includes a frame 1, a tool magazine 101, a column spindle 102, and a rotating shaft 103. The tool magazine 101 and the column spindle 102 are installed side by side in the frame 1. The rotating shaft 103 is connected to the frame 1. Tools are mounted on the tool magazine 101 and the column spindle 102. A tool changing arm 104 is provided on the rotating shaft 103. The tool changing arm 104 has tool changing grooves 1041 at both ends that mate with the tools. The tool changing arm 104 has a locking groove 1042 and a top groove 105 inside. The locking groove 1042 and the top groove 105 are connected. Locking pins 106 are provided at both ends of the tool changing arm 104. The top pin 107 and the locking pin 106 are elastically connected to the locking groove 1042. The top pin 107 is elastically connected to the top groove 105 and one end of the top pin 107 abuts against the frame 1. The top groove 105 is provided with a turntable 108 and a rotating assembly 2. The turntable 108 is concentric with the top groove 105. The turntable 108 includes a convex surface 201 and a concave surface 202. The convex surface 201 and the concave surface 202 are arranged at intervals on the outer edge of the turntable 108. The top pin 107 passes through the turntable 108 and is rotatably connected to the turntable 108. The rotating assembly 2 drives the convex surface 201 and the concave surface 202 to alternately abut against the locking pin 106 through the extension and retraction of the top pin 107.

[0040] Please see Figures 1 to 8The rotating assembly 2 includes a convex surface 201, a concave surface 202, a guide groove 203, a sliding part 204, and a locking member 3. The convex surface 201 and the concave surface 202 are arranged at intervals on the outer edge of the turntable 108. The guide groove 203 is a ring-shaped wavy line and is opened on the inner edge of the turntable 108. The lowest point of the guide groove 203 is located in the direction of the concave surface 202, and the highest point of the guide groove 203 is located in the direction of the convex surface 201. One end of the sliding part 204 is rotatably connected to the top pin 107, and the other end is slidably connected to the guide groove 203. The locking member 3 is connected to the top pin 107 and the turntable 108. The connection between the convex surface 201 and the concave surface 202 is provided with a rounded corner 2021. The locking pin 106 is provided with an inner arc surface 1061 near the end of the turntable 108. The inner arc surface 1061 is inclined towards the rotation direction of the turntable 108. A rotating part 1081 is rotatably connected to the turntable 108. A rotating pin 1082 is provided on the lower end face of 1081, and a rotating groove 1083 is provided on the upper end face of the turntable 108. The rotating pin 1082 is elastically connected to the rotating groove 1083. The opening end of the inner wall groove 301 is inclined toward the concave surface 202. The locking member 3 includes an inner wall groove 301 arranged in a circumferential array on the inner wall of the top groove 105. A fixing block 302 is elastically connected in the inner wall groove 301. The fixing block 302 abuts against the concave surface 202. A top plate 303 is provided at the lower end of the top pin 107. A pin 3031 is elastically connected on the top plate 303. The pin 3031 is conical. The pin 3031 penetrates the inner wall groove 301 and abuts against the fixing block 302. A phase-changing part 2031 is provided at the wavy end of the guide groove 203. The diameter of the phase-changing part 2031 is larger than the wavy diameter of the guide groove 203. The phase-changing part 2031 is inclined toward the path of the same end guide groove 203.

[0041] Please see Figures 8 to 10 The fixed block 302 is provided with an outer arc surface 3021 that is inclined toward the rotation direction of the turntable 108. The outer arc surface 3021 slides along the middle of the concave surface 202 and abuts against the rounded corner 2021. The arc length of the concave surface 202 is half the arc length of the rotating groove 1083. The arc length of the convex surface 201 on the rotating part 1081 is equal to the arc length of the rotating groove 1083. A toothed surface 2011 is provided on the convex surface 201 of the rotating part 1081. A wedge block 1062 is elastically connected to the locking pin 106. The wedge block 1062 is inclined toward the rotation direction of the turntable 108 and abuts against the toothed surface 2011.

[0042] Please see Figures 1 to 8The column-type machining center processes materials. After drilling, the material needs rough milling. After receiving the programming command, the machine frame 1 drives the tool magazine 101 to retrieve the milling cutter and controls the column spindle 102 to return to the tool changing position. At this time, the tool magazine 101 and the tool on the column spindle 102 are collinear. The tool changing arm 104, which is in the initial position, is perpendicular to the collinearity. After the spindle rotates 90°, the tool changing slots 1041 at both ends of the tool changing arm 104 simultaneously engage with the tools on the column spindle 102 and the tool magazine 101. At this time, the locking pin 106 moves a distance into the locking slot 1042 due to the pressure of the tool. The tool is fixed in the tool changing slot 1041 by the locking pin 106 due to the elasticity, thus preventing the tool from leaving the tool changing slot when separating from the tool magazine 101 and the column spindle 102. 1041 falls. After the tool changing arm 104 is connected with the tool, the frame 1 drives the rotating shaft 103 to extend, thereby pulling out the tool from the tool magazine 101 and the column spindle 102. At this time, the upper end face of the top pin 107 on both sides of the tool changing arm 104 begins to separate from the output end face of the rotating shaft 103. The top pin 107 is pushed upward by the elastic force. Since the guide groove 203 is wavy, the sliding part 204 moves along the path of the top pin 107, causing the sliding part 204 to move from the lowest point to the highest point along the path of the guide groove 203. The lowest point and the highest point of the guide groove 203 are located in the direction of the convex surface 201 and the concave surface 202, respectively. This makes the sliding part 204, which was originally in contact with the inner arc surface 1061 of the locking pin 106, when it moves to the highest point of the guide groove 203. As the concave surface 202 rotates, the inner arc surface 1061 transitions to the convex surface 201 via the rounded corner 2021 during the rotation of the turntable 108. Since the inner arc surface 1061 and the rounded corner 2021 are concentric, the friction between them is minimized, resulting in a smooth transition of the turntable 108 from the concave surface 202 to the convex surface 201. This completes the locking of the tool by the locking pin 106. During the process of the top pin 107 ejecting from the top groove 105, the top plate 303 at the lower end of the top pin 107 moves towards the inner wall groove 301, further inserting the ejector pin 3031 into the inner wall groove 301. Because the ejector pin 3031 is conical, during the insertion of the ejector pin 3031 into the inner wall groove 301, the fixing block 3... 02 is squeezed out of the inner wall groove 301 by the ejector pin 3031. As the sliding part 204 moves to the highest point of the guide groove 203, the convex surface 201 on the turntable 108 completely presses against the inner arc surface 1061, thereby locking the locking pin 106. At the same time, the fixing block 302 abuts against the concave surface 202 to fix the position of the turntable 108, thereby improving the locking strength of the locking pin 106 for the tool. Furthermore, by opening the same inclined phase part 2031 at the upper and lower ends of the guide groove 203, the sliding part 204 will move into the phase part 2031 after reaching the upper and lower ends of the guide groove 203. Due to the torsional elastic force and the guidance of the phase part 2031, it will only enter the path of the guide groove 203 on the side close to the phase part 2031.This ensures that the rotation direction of the turntable 108 is definite, thereby preventing the locking pin 106 from repeatedly abutting against the same convex surface 201. Simultaneously, by tilting the inner wall groove 301 and cooperating with the rotating part 1081 on the turntable 108, after the convex surface 201 on the turntable 108 abuts against the locking pin 106, the fixing block 302 presses against the concave surface 202 on the rotating part 1081. Because the inner wall groove 301 is tilted, the rotating part 1081 is pressed by the fixing block 302, thus causing… The rotation allows the rotating part 1081 to rotate further. If the convex surface 201 on the turntable 108 wears down after long-term use, causing the locking pin 106 to wobble during locking, the rotating part 1081 can rotate further. Before the outer arc surface 3021 and the concave surface 202 completely overlap, the convex surface 201 on the rotating part 1081, which meets the locking conditions, re-abuts against the locking pin 106. After the turntable 108 rotates from the concave surface 202 to the convex surface 201, the toothed surface 2011 abuts against the wedge block 1062 and locks in one direction, thus locking the locking pin 106. 6. The tool is fully locked. At this time, the frame 1 drives the rotating shaft 103 to rotate 180°, so that the tools on the tool magazine 101 and the column spindle 102 are swapped. The rotating shaft 103 is then further driven to retract, and the upper end face of the top pin 107 abuts against the output end face of the rotating shaft 103 again. The top pin 107 is squeezed into the top groove 105. At the same time, the sliding part 204 moves from the highest point of the guide groove 203 to the lowest point of the phase-changing part 2031. As the top plate 303 retracts, the ejector pin 3031 retracts synchronously, so that the fixed part... The fixed block 302 retracts into the inner groove 301 under elastic force, and the rotating part 1081 is no longer squeezed by the fixed block 302. This causes the rotating pin 1082 on the rotating part 1081 to be unable to resist the spring's thrust and move along the inner wall of the rotating groove 1083 to one end of the rotating groove 1083 to complete its reset. After the above process is completed, the locking pin 106 releases its lock on the tool, allowing the tool to disengage from the tool changing arm 104. After the tool changing arm 104 rotates 180° in the reverse direction, the tool replacement is completed.

[0043] The specific embodiment of the present invention has been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the embodiments described above. For those skilled in the art, various changes, modifications, substitutions, and variations made to these embodiments without departing from the principles and ideas of the present invention should still fall within the protection scope of the present invention.

Claims

1. A column-type machining center, characterized by, The utility model provides a tool magazine device, including frame (1), tool magazine (101), column main shaft (102) and rotary shaft (103), tool magazine (101) is installed in frame (1) with column main shaft (102) side by side, rotary shaft (103) is connected with frame (1), tool magazine (101) is installed with tool on column main shaft (102), rotary shaft (103) is equipped with tool changing arm (104), tool changing arm (104) left and right two ends are equipped with with tool changing groove (1041) that cooperates, the inside of tool changing arm (104) is equipped with locking groove (1042) and top groove (105), locking groove (1042) is communicated with top groove (105), tool changing arm (104) left and right two ends are equipped with locking pin (106) and top pin (107), locking pin (106) is elastically connected with locking groove (1042), top pin (107) is elastically connected with top groove (105) and top pin (107) one end is abutted with frame (1), top groove (105) is equipped with rotating disc (108) and rotating assembly (2), rotating disc (108) is concentric with top groove (105), rotating disc (108) includes convex surface (201) and concave surface (202), convex surface (201) and concave surface (202) are arranged in interval in the outer edge of rotating disc (108), top pin (107) penetrates rotating disc (108) and is rotatably connected with rotating disc (108), rotating assembly (2) is driven convex surface (201) and concave surface (202) with locking pin (106) alternate abutment through the telescopic drive of top pin (107).

2. A column-type machining center according to claim 1, characterized in that Rotating assembly (2) includes guide groove (203), sliding part (204) and locking part (3), guide groove (203) is annular wave line and is arranged on the inner edge surface of rotating disc (108), the lowest point of guide groove (203) is located in the direction of concave surface (202), the highest point of guide groove (203) is located in the direction of convex surface (201), one end of sliding part (204) is rotatably connected with top pin (107), and the other end is slidably connected with guide groove (203), and locking part (3) is connected with top pin (107) and rotating disc (108).

3. A column-type machining center according to claim 2, characterized in that Locking part (3) includes inner wall groove (301) that is arranged in the inner wall of top groove (105) in circumferential array, the inner wall groove (301) is elastically connected with fixed block (302), the fixed block (302) is abutted with concave surface (202), the lower end of top pin (107) is equipped with top disc (303), the top disc (303) is elastically connected with thimble (3031), the thimble (3031) is tapered, the thimble (3031) penetrates inner wall groove (301) and is abutted with fixed block (302).

4. A column-type machining center according to claim 2, characterized in that The end of wave shape of guide groove (203) is equipped with phase change part (2031), the diameter of phase change part (2031) is greater than the diameter of wave shape of guide groove (203), and phase change part (2031) is inclined towards the path of guide groove (203) of the same end.

5. A column-type machining center according to claim 2, characterized in that The connecting part of the convex surface (201) and the concave surface (202) is provided with a round corner (2021), and the locking pin (106) is provided with an inner circular surface (1061) near one end of the rotating disc (108), which is arranged obliquely towards the rotating direction of the rotating disc (108).

6. A column-type machining center according to claim 3, characterized in that The rotating disc (108) is rotatably connected with a rotating part (1081), and the lower end surface of the rotating part (1081) is provided with a rotating pin (1082), and the upper end surface of the rotating disc (108) is provided with a rotating groove (1083), and the rotating pin (1082) is elastically connected with the rotating groove (1083), and the opening end of the inner wall groove (301) is arranged obliquely towards the concave surface (202), and the diameter of the convex surface (201) on the rotating part (1081) is greater than the diameter of the inner circular surface (1061).

7. A column-type machining center according to claim 6, characterized in that The fixed block (302) is provided with an outer circular surface (3021) obliquely towards the rotating direction of the rotating disc (108), which slides along the middle part of the concave surface (202) and abuts against the round corner (2021), and the arc length of the concave surface (202) is half of the arc length of the rotating groove (1083), and the arc length of the convex surface (201) on the rotating part (1081) is equal to the arc length of the rotating groove (1083).

8. A column-type machining center according to claim 7, characterized in that The convex surface (201) of the rotating part (1081) is provided with a tooth surface (2011), and the locking pin (106) is elastically connected with a wedge block (1062), which is obliquely towards the rotating direction of the rotating disc (108) and abuts against the tooth surface (2011).

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