Chain type tool magazine and tool changing method suitable for eight main shaft rectangular array machine tool

Abstract

The application relates to the technical field of machine tool equipment, in particular to a chain type tool magazine and a tool changing method suitable for an eight-spindle rectangular array machine tool, which comprises a linear moving unit and a rotating motion unit, the rotating motion unit is arranged above the linear moving unit; the linear moving unit comprises two mounting seats arranged side by side, linear guide pairs are arranged at the top of the mounting seats, sliding tables are arranged at the top of the two linear guide pairs, and linear moving driving assemblies capable of driving the sliding tables to move are arranged on one side of the sliding tables; and the rotating motion unit comprises a tool disc arranged at the top of the sliding table. The chain type tool magazine is adopted, the movement precision and stability of a tool chain link assembly are guaranteed, the accuracy and reliability of a tool changing process are ensured, the polygon effect in the chain transmission process is basically offset through optimized paths, the looseness of the chain in the rotating process is extremely small, the error can be ignored, and the machining precision is improved.

Description

Technical Field

[0001] This invention relates to the field of machine tool equipment technology, specifically to a chain-type tool magazine and tool changing method suitable for an eight-spindle rectangular array machine tool. Background Technology

[0002] Five-axis linkage rectangular array blade grinding machine tools with A and B swing axis structures offer numerous advantages for grinding multiple blades, including high processing efficiency and low processing cost. They have already seen initial application in the machining of aero-engine blade components. The currently developed 8-spindle rectangular array blade grinding and polishing machine tool uses eight spindles to simultaneously process eight blades. The machine body is a gantry-type vertical machining center. By configuring a spindle synchronous swing component (B-axis) on this body that can simultaneously drive the eight spindles to rotate synchronously, and two sets of workpiece swing components (A-axis) with parallel axes on the XY platform, an eight-spindle-eight-workpiece five-axis linkage grinding and polishing system is formed, which can be used to simultaneously grind and polish eight blades.

[0003] To improve the automation level and processing efficiency of machine tools, machine tools need to have automatic tool changing functions, and due to the structural characteristics of array machine tools, conventional tool magazines on the market cannot meet the requirements.

[0004] The previously configured double-layer slide table linear tool magazine has complex movements, large size, and serious occupation of the machine tool's internal space. Furthermore, due to structural limitations, the diameter of the tools that can be used is limited, and parallel angle head tools cannot be used. When the workpiece has curved surfaces and large twists, it is impossible to achieve full surface machining in one clamping. To solve this problem, we propose a chain-type tool magazine and a matching tool changing method. Summary of the Invention

[0005] The purpose of this invention is to provide a chain-type tool magazine and tool changing method suitable for an eight-spindle rectangular array machine tool, so as to solve the problems existing in the prior art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a chain-type tool magazine suitable for an eight-spindle rectangular array machine tool, comprising a linear motion unit and a rotary motion unit, wherein the rotary motion unit is disposed above the linear motion unit; The linear motion unit includes two mounting bases arranged side by side. A linear guide pair is provided on the top of the mounting bases. A slide is provided on the top of the two linear guide pairs. A linear motion drive component capable of driving the slide is provided on one side of the slide. The rotary motion unit includes a cutter head mounted on the top of the slide table. Link support seats are provided on all four sides of the upper surface of the cutter head, with a gap between the ends of each adjacent link support seat. A link guide seat is provided on the top of each link support seat, and the link support seat extends outward from the outer side of the link guide seat. Guide grooves are provided on the outer wall of each link support seat and the bottom of the link guide seat located on its outer side. A cutter link assembly is arranged around the outer walls of the four link support seats. A link drive assembly that cooperates with the cutter link assembly is provided at one bottom corner of the cutter head. The link drive assembly drives the cutter link assembly to move around the link support seat. The tool chain assembly includes a chain surrounding the outer wall of the chain link support, a detachable tool clip located on the outside of the chain, a cam bearing located on the inside of the chain and equipped with a screw, and a deep groove ball bearing I located at the bottom of the chain and two deep groove ball bearings II and III located at the top of the chain. The cam bearing is adapted to fit the inner wall of the guide groove on the outer wall of the chain link support, the deep groove ball bearing I and the deep groove ball bearing II are adapted to fit the outer wall of the chain link support, and the deep groove ball bearing III is adapted to fit the inner wall of the guide groove at the bottom of the chain link guide seat. The chain link drive assembly can actuate the deep groove ball bearing I and the deep groove ball bearing II to roll, thereby driving the chain to rotate circumferentially.

[0007] In a preferred embodiment, the linear motion drive assembly includes a motor mount, a geared motor, a gear, and a rack; The motor base is located on one side of the slide table. A geared motor is provided on the side wall of the motor base. A gear is provided at the output end of the geared motor. The rack is provided on one side of the slide table and meshes with the gear.

[0008] In a preferred embodiment, the top of the link guide seat is provided with a tool position detection sensor bracket and a tool position detection sensor disposed between the two.

[0009] In a preferred embodiment, the rotating motion unit further includes a zero-point switch bracket disposed on one side of the bottom of the cutter head and a zero-point switch disposed on the zero-point switch bracket, and a zero-point detection block corresponding to the zero-point switch is disposed at the bottom of the cutter chain link assembly.

[0010] In a preferred embodiment, the chain includes a plurality of chain link seats connected end to end, adjacent to each other by a pin, and both ends of the pin pass through the chain link seats. The cam bearing is fixed to the inner side of the chain link seat by its own screw. The deep groove ball bearing one, deep groove ball bearing two and deep groove ball bearing three are disposed on the outer wall of the pin. The zero point detection block is disposed at the bottom end of the pin.

[0011] In a preferred embodiment, spacers are provided between the deep groove ball bearing 1 and the deep groove ball bearing 2 and the chain link seat, between the deep groove ball bearing 2 and the deep groove ball bearing 3, and between the cam bearing and the chain link seat. A shaft retainer is provided on the outer wall of the pin located on the upper surface of the deep groove ball bearing 3.

[0012] In a preferred embodiment, a blade holder is provided on the outer side of the link seat, and the blade holder is disposed on the top of the blade holder.

[0013] In a preferred embodiment, the link drive assembly includes a connecting seat disposed at one corner of the bottom of the cutter head, a second motor seat disposed at the bottom of the connecting seat, a reducer disposed at the bottom of the second motor seat, a servo motor disposed at one end of the reducer, and a shift shaft disposed above the outer wall of the connecting seat and capable of being driven by the servo motor and the reducer. The outer wall of the shift shaft is in close contact with the outer walls of the first deep groove ball bearing and the second deep groove ball bearing.

[0014] In a preferred embodiment, the chain link drive assembly further includes a support shaft, a tapered roller bearing, a spacer, a lock nut, a coupling, and a height adjustment shim; The tapered roller bearings are arranged in pairs in the inner hole of the connecting seat. The support shaft is fitted with the inner hole of the tapered roller bearing and is fixed on the inner ring of the tapered roller bearing by a lock nut. The top of the support shaft extends out of the connecting seat and is connected to the shift shaft. The coupling is located at the output end of the reducer. The other end of the coupling is provided with an output shaft connected to the support shaft. The height adjustment shim is located between the connecting seat and the cutter head.

[0015] A tool changing method for a chain-type tool magazine suitable for an eight-spindle rectangular array machine tool includes the following steps: S1. After receiving the tool change command, the tool magazine rotates the motion unit, causing the chain link drive assembly to drive the tool chain link assembly to rotate, and rotates the empty tool holder to the tool change position. S2. The linear motion unit operates, pushing out the tool disc and causing the empty tool holder to hold the tool on the spindle. In conjunction with the up-and-down movement of the spindle of the external equipment, the tool on the spindle is removed. S3. Rotate the motion unit again to make the chain link drive assembly drive the tool chain link assembly to rotate, and rotate the tool holder that needs to be changed to the tool change position. S4. The external equipment spindle moves down to load the tool into the spindle. The spindle pulls the tool tight, the linear motion unit rotates, and the tool disc is retracted, so that the tool is loaded into the empty tool holder, completing the tool change. The tool disc is then completely retracted, and the tool change is finished.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. This invention significantly improves the automation level and processing efficiency of machine tools, reduces manual intervention, and increases production efficiency; 2. This invention optimizes the tool magazine structure, effectively reducing its volume, minimizing its footprint within the machine tool, and improving space utilization. 3. This invention can be configured with a parallel angle head tool, which greatly enhances the machining capability of the machine tool; 4. This invention uses a chain-type tool magazine to ensure the movement accuracy and stability of the tool chain link assembly, and to ensure the accuracy and reliability of the tool changing process; 5. By optimizing the path, this invention essentially eliminates the polygonal effect in the chain drive process, minimizing chain loosening during rotation and making the error negligible, thereby improving processing accuracy. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the chain-type tool magazine of the present invention; Figure 2 This is a schematic diagram of the front cross-sectional structure of the linear motion unit of the present invention; Figure 3 This is a schematic diagram of the front cross-sectional structure of the rotating motion unit of the present invention; Figure 4 This is a top view of the rotating motion unit of the present invention. Figure 5 For the present invention Figure 3 Enlarged structural diagram at point I; Figure 6 This is a top cross-sectional view of the rotating motion unit of the present invention; Figure 7 These are schematic diagrams of the right view, right sectional view, and front sectional view of the tool chain assembly of the present invention. Figure 8 This is a schematic diagram of the front cross-sectional structure of the link drive assembly of the present invention; Figure 9 This is a diagram illustrating the application of the chain tool magazine of the present invention in a machine tool; Figure 10 This is a diagram illustrating the tool changing action of the present invention. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] It should be noted that in the following technical solutions, screws 03, 01-03, 01-05, 01-07, 01-11, 01-13, 02-02, 02-03, 02-06, 02-09, 02-10, 02-12, 02-15, A08, A12, B11, B12, B13, and B15 are screw structures of the same or different sizes, which should be understood by those skilled in the art, and will not be distinguished or described in detail here.

[0020] Please see Figures 1-9 The present invention provides a technical solution: a chain tool magazine suitable for an eight-spindle rectangular array machine tool, comprising a linear motion unit 01 and a rotary motion unit 02, wherein the rotary motion unit 02 is mounted above the linear motion unit 01 by screws 03; The linear motion unit 01 includes two mounting seats 01-01 arranged side by side. A linear guide pair 01-02 is provided on the top of the mounting seat 01-01. A slide table 01-04 is provided on the top of the two linear guide pairs 01-02. A linear motion drive assembly capable of driving the slide table 01-04 is provided on one side of the slide table 01-04. The linear guide pair 01-02 includes a guide rail and a slider. The guide rail is connected to the mounting seat 01-01 by screws 01-03, and the slider is connected to the slide table 01-04 by screws 01-05. The rotary motion unit 02 includes a cutter head 02-01 connected to the top of the slide table 01-04 by screws 02-02. Each of the four sides of the upper surface of the cutter head 02-01 is provided with a link support seat 02-04, and there is a gap between the ends of each adjacent link support seat 02-04. A link guide seat 02-05 is provided on the top of the link support seat 02-04, and the link support seat 02-04 extends outward from the outer side of the link guide seat 02-05. The link support seat 02-04 and the link... Guide seat 02-05 is connected to cutter head 02-01 by screw 02-06. Guide grooves are provided on the outer wall of link support seat 02-04 and the bottom of link guide seat 02-05 located on its outer side. The outer walls of the four link support seats 02-04 are surrounded by cutter link assembly A. A link drive assembly B that cooperates with cutter link assembly A is provided at the bottom corner of cutter head 02-01. The link drive assembly B drives the cutter link assembly A to move around the link support seat 02-04. The tool chain assembly A includes a chain surrounding the outer wall of the chain link support 02-04, a detachable tool clip A11 located on the outside of the chain, a cam bearing A01 located on the inside of the chain and equipped with a screw, a deep groove ball bearing A02 located at the bottom of the chain, and deep groove ball bearings A03 and A04 located at the top of the chain. The cam bearing A01 is adapted to fit the inner wall of the guide groove on the outer wall of the chain link support 02-04. The deep groove ball bearings A02 and A03 are adapted to fit the outer wall of the chain link support 02-04. The deep groove ball bearing A04 is adapted to fit the inner wall of the guide groove at the bottom of the chain link guide seat 02-05. The chain link drive assembly B can actuate the deep groove ball bearings A02 and A03 to roll, thereby driving the chain to rotate circumferentially.

[0021] In specific implementation, the linear motion drive assembly includes a motor base 01-12, a geared motor 01-10, a gear 01-08, and a rack 01-06; Motor base 01-12 is located on one side of slide table 01-04. Motor base 01-12 has screws 01-13 for connecting to external support tools. The side wall of motor base 01-12 is connected to a gear motor 01-10 by screws 01-11. The output end of gear motor 01-10 is connected to gear 01-08 by a flat key 01-09. Rack 01-06 is connected to one side of slide table 01-04 by screws 01-07 and meshes with gear 01-08. By engaging gear 01-08 and rack 01-06, the geared motor 01-10 can easily drive the slide 01-04 to move linearly along the linear guide pair 01-02, thereby driving the rotary motion unit 02 to move linearly.

[0022] In specific implementation, the top of the chain link guide seat 02-05 is connected to the tool position detection sensor bracket 02-07 and the tool position detection sensor 02-08 connected between the two by screws 02-09. The tool position detection sensor 02-08 can detect whether the tool chain link assembly A, which has been rotated to the corresponding position, is equipped with a tool. With a linear four-array arrangement, four tool chain link assemblies A can be detected simultaneously.

[0023] In specific implementation, the rotating motion unit 02 also includes a zero-point switch bracket 02-11 connected to the bottom side of the cutter head 02-01 by screws 02-12 and a zero-point switch 02-13 set on the zero-point switch bracket 02-11. The bottom of the cutter chain link assembly A is provided with a zero-point detection block 02-14 corresponding to the zero-point switch 02-13. The automatic zero-point return of the tool magazine can be easily achieved through the cooperation of zero-point switch 02-13 and zero-point detection block 02-14.

[0024] In specific implementation, the chain includes several chain link seats A05 connected end to end, which are connected to each other by a pin A06, and both ends of the pin A06 pass through the chain link seat A05. The cam bearing A01 is fixed to the inner side of the chain link seat A05 by its own screw. Deep groove ball bearing one A02, deep groove ball bearing two A03 and deep groove ball bearing three A04 are set on the outer wall of the pin A06. The zero point detection block 02-14 is connected to the bottom end of the pin A06 by screw 02-15.

[0025] In specific implementation, spacers A09 are provided between deep groove ball bearing A02 and deep groove ball bearing A03 and chain link seat A05, between deep groove ball bearing A03 and deep groove ball bearing A04, and between cam bearing A01 and chain link seat A05. A shaft retainer A10 is provided on the outer wall of the pin A06 located on the upper surface of deep groove ball bearing A04 to limit the movement.

[0026] In practice, the outer side of the chain link seat A05 is connected to the tool holder seat A07 by screw A08, and the tool holder A11 is fixed to the top of the tool holder seat A07 by screw A12 and pin A13, which facilitates the disassembly of the tool holder A11.

[0027] In specific implementation, the chain link drive assembly includes a connecting seat B01 connected to one corner of the bottom of the cutter head 02-01 by screws 02-03, a motor base B07 connected to the bottom of the connecting seat B01 by screws B15, a reducer B08 connected to the bottom of the motor base B07 by screws B11, a servo motor B09 connected to one end of the reducer B08 by screws B12, and a shift shaft B03 located on the outer wall of the connecting seat B01 and driven by the servo motor B09 and the reducer B08. The outer wall of the shift shaft B03 is in close contact with the outer walls of the deep groove ball bearing A02 and the deep groove ball bearing A03.

[0028] In practice, the chain link drive assembly also includes a support shaft B02, a tapered roller bearing B04, a spacer B05, a lock nut B06, a coupling B10, and a height adjustment shim B14. Tapered roller bearings B04 are installed in pairs in the inner hole of connecting seat B01. Support shaft B02 is fitted with the inner hole of tapered roller bearing B04 and is fixed to the inner ring of tapered roller bearing B04 by locking nut B06. The top of support shaft B02 extends out of connecting seat B01 and is connected to dial shaft B03 by screw B13. Coupling B10 is installed at the output end of reducer B08. The other end of coupling B10 is provided with an output shaft connected to support shaft B02. Height adjustment shim B14 is installed between connecting seat B01 and cutter head 02-01.

[0029] More specifically, when the pivot B03 rotates, it drives the chain to rotate by actuating the deep groove ball bearings A02 and A03. During this process, the cooperation between the A01 cam bearing and the guide groove in the chain link support seat 02-04 can accurately limit the position of the tool in the height direction, ensuring that the tool height is consistent. The deep groove ball bearings A02 and A03 roll along the outer wall of the chain link support seat 02-04, and the deep groove ball bearing A04 rolls along the guide groove on the chain link guide seat 02-05. Through the chain link support seat 02-04 and the chain link guide seat 02-05, the tool chain link assembly A can be restricted to always move along a fixed trajectory, thereby ensuring that the rotation trajectory of the tool is consistent. By restricting the position of the tool chain link assembly A through the above structure, the relative position of the tool chain link assembly A in the tool changing position is completely consistent with the corresponding spindle, so as to meet the needs of array tool changing. By optimizing the path, the polygonal effect in the chain drive process can be largely offset, resulting in only a 0.01 mm looseness in the chain during rotation. In actual use, this error is negligible, thus eliminating the need for the tensioning structure required in traditional chain drives. Furthermore, the use of bearings ensures that the contact points of the tool chain link assembly A move along the path using rolling motion, leading to higher transmission efficiency, reduced wear, and extended service life. Moreover, based on the spindle center distance of the eight-array rectangular array machine tool, calculations ensure that the spindle center distance is an integer multiple of the link pitch of the tool chain link assembly A, meeting the requirement for simultaneous tool changing of four spindles in a single row. This also makes the tool changing control logic clearer and the program simpler. The chain formed by the tool chain link assembly A simultaneously transmits power and supports the tool, further simplifying the overall structure.

[0030] like Figure 10 As shown, taking the removal of tool T1 and replacement with tool T2 as an example, the tool changing steps are as follows: ①After receiving the tool change command, the tool magazine rotates the motion unit, which drives the tool chain assembly to rotate, and rotates the rear T1 tool holder to the tool change position.

[0031] ② The linear motion unit operates, pushing out the cutter head, causing the rear T1 tool holder to lock the rear T1 tool on the main shaft. In conjunction with the up-and-down movement of the main shaft of the external equipment, the rear T1 tool is removed.

[0032] ③ Rotate the motion unit to move the front row T1 tool holder to the tool change position. The linear motion unit moves to push the tool disc out further, so that the front row T1 tool holder locks the front row T1 tool on the spindle. With the spindle moving up and down, the front row T1 tool is removed.

[0033] ④ Rotate the motion unit to move the front row T2 tool holder to the tool changing position, move the spindle down to load the T2 tool into the spindle, and move the linear motion unit to retract the tool turret, thus completing the replacement of the front row T2 tool.

[0034] ⑤ Rotate the motion unit to move the rear T2 tool holder to the tool changing position, move the spindle down to load the T2 tool into the spindle, and move the linear motion unit to continue retracting the tool turret, thus completing the replacement of the rear T2 tool.

[0035] ⑥ The linear movement unit moves, the tool turret retracts completely, and the tool change ends.

[0036] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A chain-type tool magazine suitable for an eight-spindle rectangular array machine tool, characterized in that: It includes a linear motion unit and a rotary motion unit, wherein the rotary motion unit is disposed above the linear motion unit; The linear motion unit includes two mounting bases arranged side by side. A linear guide pair is provided on the top of the mounting bases. A slide is provided on the top of the two linear guide pairs. A linear motion drive component capable of driving the slide is provided on one side of the slide. The rotary motion unit includes a cutter head mounted on the top of the slide table. Link support seats are provided on all four sides of the upper surface of the cutter head, with a gap between the ends of each adjacent link support seat. A link guide seat is provided on the top of each link support seat, and the link support seat extends outward from the outer side of the link guide seat. Guide grooves are provided on the outer wall of each link support seat and the bottom of the link guide seat located on its outer side. A cutter link assembly is arranged around the outer walls of the four link support seats. A link drive assembly that cooperates with the cutter link assembly is provided at one bottom corner of the cutter head. The link drive assembly drives the cutter link assembly to move around the link support seat. The tool chain assembly includes a chain surrounding the outer wall of the chain link support, a detachable tool clip located on the outside of the chain, a cam bearing located on the inside of the chain and equipped with a screw, and a deep groove ball bearing I located at the bottom of the chain and two deep groove ball bearings II and III located at the top of the chain. The cam bearing is adapted to fit the inner wall of the guide groove on the outer wall of the chain link support, the deep groove ball bearing I and the deep groove ball bearing II are adapted to fit the outer wall of the chain link support, and the deep groove ball bearing III is adapted to fit the inner wall of the guide groove at the bottom of the chain link guide seat. The chain link drive assembly can actuate the deep groove ball bearing I and the deep groove ball bearing II to roll, thereby driving the chain to rotate circumferentially.

2. A chain-type tool magazine suitable for an eight-spindle rectangular array machine tool according to claim 1, characterized in that: The linear motion drive assembly includes a motor base, a reduction motor, gears, and a rack; The motor base is located on one side of the slide table. A geared motor is provided on the side wall of the motor base. A gear is provided at the output end of the geared motor. The rack is provided on one side of the slide table and meshes with the gear.

3. A chain-type tool magazine suitable for an eight-spindle rectangular array machine tool according to claim 2, characterized in that: The top of the chain link guide seat is provided with a tool position detection sensor bracket and a tool position detection sensor disposed between the two.

4. A chain-type tool magazine suitable for an eight-spindle rectangular array machine tool according to claim 3, characterized in that: The rotating motion unit also includes a zero-point switch bracket disposed on one side of the bottom of the cutter head and a zero-point switch disposed on the zero-point switch bracket, and a zero-point detection block corresponding to the zero-point switch is disposed at the bottom of the cutter chain link assembly.

5. A chain-type tool magazine suitable for an eight-spindle rectangular array machine tool according to claim 4, characterized in that: The chain includes several chain link seats connected end to end, which are connected to each other by a pin, and both ends of the pin pass through the chain link seats. The cam bearing is fixed to the inner side of the chain link seat by its own screw. The deep groove ball bearing one, deep groove ball bearing two and deep groove ball bearing three are set on the outer wall of the pin. The zero point detection block is set at the bottom end of the pin.

6. A chain-type tool magazine suitable for an eight-spindle rectangular array machine tool according to claim 5, characterized in that: Spacers are provided between the deep groove ball bearing 1 and deep groove ball bearing 2 and the chain link seat, between the deep groove ball bearing 2 and the deep groove ball bearing 3, and between the cam bearing and the chain link seat. A shaft retainer is provided on the outer wall of the pin located on the upper surface of the deep groove ball bearing 3.

7. A chain-type tool magazine suitable for an eight-spindle rectangular array machine tool according to claim 6, characterized in that: A tool holder is provided on the outer side of the link seat, and the tool holder is located on top of the tool holder.

8. A chain-type tool magazine suitable for an eight-spindle rectangular array machine tool according to claim 7, characterized in that: The chain link drive assembly includes a connecting seat located at one corner of the bottom of the cutter head, a motor base two located at the bottom of the connecting seat, a reducer located at the bottom of the motor base two, a servo motor located at one end of the reducer, and a shift shaft located above the outer wall of the connecting seat that can be driven by the servo motor and the reducer. The outer wall of the shift shaft is in close contact with the outer walls of the first deep groove ball bearing and the second deep groove ball bearing.

9. A chain-type tool magazine suitable for an eight-spindle rectangular array machine tool according to claim 8, characterized in that: The chain link drive assembly also includes a support shaft, tapered roller bearings, spacers, lock nuts, couplings, and height adjustment shims; The tapered roller bearings are arranged in pairs in the inner hole of the connecting seat. The support shaft is fitted with the inner hole of the tapered roller bearing and is fixed on the inner ring of the tapered roller bearing by a lock nut. The top of the support shaft extends out of the connecting seat and is connected to the shift shaft. The coupling is located at the output end of the reducer. The other end of the coupling is provided with an output shaft connected to the support shaft. The height adjustment shim is located between the connecting seat and the cutter head.

10. A tool changing method for a chain-type tool magazine suitable for an eight-spindle rectangular array machine tool, characterized in that: The tool changing method is applied to a chain-type tool magazine suitable for an eight-spindle rectangular array machine tool as described in any one of claims 1-9, and the tool changing method includes the following steps: S1. After receiving the tool change command, the tool magazine rotates the motion unit, causing the chain link drive assembly to drive the tool chain link assembly to rotate, and rotates the empty tool holder to the tool change position. S2. The linear motion unit operates, pushing out the tool disc and causing the empty tool holder to hold the tool on the spindle. In conjunction with the up-and-down movement of the spindle of the external equipment, the tool on the spindle is removed. S3. Rotate the motion unit again to make the chain link drive assembly drive the tool chain link assembly to rotate, and rotate the tool holder that needs to be changed to the tool change position. S4. The external equipment spindle moves down to load the tool into the spindle. The spindle pulls the tool tight, the linear motion unit rotates, and the tool disc is retracted, so that the tool is loaded into the empty tool holder, completing the tool change. The tool disc is then completely retracted, and the tool change is finished.

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