Full-automatic chain tool magazine

Abstract

The invention provides a full-automatic chain tool magazine which comprises a movable base, a plurality of chain tool magazine devices distributed in parallel at intervals are installed on the movable base, each chain tool magazine device comprises a rack, two chain wheels distributed in parallel at intervals are installed on the rack, one chain wheel is connected with a driving assembly, and the other chain wheel is connected with a transmission assembly. The two chain wheels are connected through an annular chain, a lower annular guide strip is installed on the portion, located on the periphery of the lower portion of the annular chain, of the rack, a plurality of cutter claw assemblies which are evenly distributed at intervals are installed on the annular chain, guide strip butt joint blocks arranged on the cutter claw assemblies are inserted into the annular guide strip, and the upper guide cover covers the upper portion of the rack. And the upper guide bearing arranged on each cutter claw assembly is embedded into an annular guide groove formed in the upper guide cover. The full-automatic tool magazine is large in capacity and compact in structure, all directions during running of the chain can be limited through the structural design of upward and downward guiding of the tool magazine, and the positioning precision of the tool magazine is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of numerical control machine tool equipment, and particularly relates to a fully automatic chain tool magazine. Background Art

[0002] Heavy cutting machines are industrial equipment designed specifically for machining large, high-hardness or complex workpieces. The core advantages of heavy cutting machines lie in heavy load, high efficiency and high precision, making them suitable for machining large key components.

[0003] Numerical control four-spindle heavy cutting machines have been widely used in the machining of medium and small-sized precision parts or products due to their advantages such as small volume and high machining accuracy. However, with the continuous improvement of product complexity and machining requirements, higher requirements are also put forward for numerical control four-spindle heavy cutting machines. It is not only required that the machine tool occupies a small space, but also that the machine tool has a sufficiently large tool magazine capacity. Although the existing disc tool magazines can achieve a relatively large tool magazine capacity, due to their relatively large volume, and often an additional tool changing mechanism is required for tool changing, resulting in a relatively large occupied space inside the machine tool, which is not conducive to the miniaturization design of the machine tool. The direct-pick type straight-line tool magazine occupies less space and does not require a robot for tool changing, but its tool magazine capacity is limited and cannot meet the requirements of the machine tool for the number of tools. The existing chain-type tool magazines have a relatively large tool magazine capacity, but their structures are complex. Especially during the operation of the chain tool magazine, since the chain will become loose during long-term use, it is easy to cause inaccurate positioning, and then it may cause the spindle to fail to grasp the tool or damage. Summary of the Invention

[0004] Aiming at the deficiencies of the prior art, the present invention proposes a fully automatic chain tool magazine, which has a large capacity and a compact structure. Through the structural design of the upper and lower guides of the tool magazine, various directions of the chain during operation are restricted. Even if the chain becomes loose during use, it will not affect the positioning accuracy of the tool magazine.

[0005] To achieve the above technical solution, the present invention provides a fully automatic chain tool magazine, including: a moving base, on which a plurality of chain tool magazine devices are installed in parallel at intervals. Each chain tool magazine device includes an independent frame, which is fixed on the moving base. At the front and rear ends of the frame, two sprockets are installed in parallel at intervals. One of the sprockets is connected to a driving component, and the two sprockets are connected by an endless chain. Below the periphery of the endless chain on the frame, a lower annular guide bar is installed. A plurality of uniformly spaced claw assemblies are installed on the endless chain. The claw assembly includes a claw seat, which is fixed on the chain. An upper guide bearing is installed at the rear end of the claw seat. Two symmetrically distributed clamping arms are fixed on the claw seat through a rotating pin shaft. A strong spring is installed between the rear ends of the two clamping arms. A guide bar docking block is installed below the claw seat, and the guide bar docking block is inserted into the lower annular guide bar located below the endless chain. An upper guide cover covers the upper part of the frame. An annular guide groove is provided in the upper guide cover, and the upper guide bearings provided on each claw assembly are embedded in the annular guide groove provided in the upper guide cover.

[0006] Preferably, the moving base includes a base body, and a guide rail limit docking bar for connecting with a guide rail is installed at the bottom of the base body to facilitate the overall operation of the base body driving the four chain tool magazine devices.

[0007] Preferably, a screw rod mounting seat connected to a screw rod is also installed at the center of the bottom of the base body to facilitate the connection with the screw rod for driving the overall movement of the base body.

[0008] Preferably, the driving component includes a chain driving motor and a planetary reducer. The planetary reducer is installed below the sprocket and connected to the sprocket. The chain driving motor is connected to the planetary reducer. The planetary reducer and the chain driving motor can both be built into the tool magazine, which can save a large amount of space.

[0009] Preferably, a proximity switch mounting seat is installed on one side of the front end of the endless chain on the frame. A proximity switch corresponding to the claw assembly is installed on the proximity switch mounting seat. During actual operation, it can be judged whether there is a tool on the corresponding claw assembly through the proximity switch, so as to provide a discrimination signal for the tool change of the spindle.

[0010] Preferably, a chain adjusting block for adjusting the chain tension is also installed on the frame. When the chain is loose, the chain tension can be adjusted only by adjusting the chain adjusting block, which is convenient to operate.

[0011] Preferably, the chain is a double-row composite chain to improve the strength of the chain.

[0012] The beneficial effects of the fully automatic chain tool magazine provided by the invention are as follows:

[0013] (1) The present invention adopts a chain tool magazine device with four independent and parallel spaced distributions on the same moving base. Each chain tool magazine device can correspond to providing a tool magazine for a main shaft. The overall tool magazine adopts a chain structure, which not only makes the structural layout of the tool magazine more compact, but also greatly increases the capacity of the tool magazine, and can meet the tool change requirements for simultaneous independent machining of a four-spindle heavy cutting machine.

[0014] (2) Through the structural design of the tool claw assembly, the present invention adopts a tool claw structure design with elastic double arms for automatic opening and closing. During actual operation, the tool can be clamped by using a strong spring installed between the rear ends of the two clamping arms to push the clamping arms. When the main shaft takes the tool, only the thrust of the strong spring needs to be overcome to take out the tool from the clamping arms, which not only simplifies the structure of the tool claw, but also greatly facilitates the tool loading and tool taking operations.

[0015] (3) Through the structural design of the upper and lower guiding of the tool magazine, the upper part of the tool magazine is limited by embedding the upper guiding bearings provided on each tool claw assembly into the annular guiding grooves provided on the upper guiding cover. The lower part of the tool magazine is limited by inserting the guiding bar docking blocks provided on each tool claw assembly into the lower annular guiding bar located below the annular chain, which will limit the movement of each tool claw assembly driven by the chain in all directions. Even if the chain becomes loose during use, it will not affect the positioning accuracy of each tool claw assembly, thereby improving the operation accuracy of the entire tool magazine. Description of the Drawings

[0016] Figure 1 is the top view of the present invention.

[0017] Figure 2 is the front view of the present invention.

[0018] Figure 3 is the three-dimensional structure schematic diagram of the chain tool magazine device in the present invention.

[0019] Figure 4 is the top view of the chain tool magazine device in the present invention.

[0020] Figure 5 is the top view of the chain tool magazine device in the present invention after removing the upper guiding cover.

[0021] Figure 6 is the side view of the chain tool magazine device in the present invention.

[0022] Figure 7 is the sectional view of the chain tool magazine device in the present invention.

[0023] Figure 8 is the partial structure installation diagram of the chain tool magazine device in the present invention.

[0024] In the figure: 100, mobile base; 101, base body; 102, guide rail limit docking strip; 103, screw rod mounting seat; 200, chain tool magazine device; 210, frame; 220, drive assembly; 221, chain drive motor; 222, planetary reducer; 223, sprocket; 230, tool claw assembly; 231, tool claw seat; 232, upper guide bearing; 233, clamping arm; 234, rotating pin shaft; 235, strong spring; 236, guide strip docking block; 240, chain; 250, lower annular guide strip; 260, proximity switch mounting seat; 270, proximity switch; 280, tool; 290, chain adjustment block; 2110, upper guide cover. Detailed implementation mode

[0025] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0026] Embodiment: A fully automatic chain tool magazine.

[0027] Refer to Figures 1 to 8 As shown, a fully automatic chain tool magazine includes:

[0028] A mobile base 100, the mobile base 100 includes a base body 101, and a guide rail limit docking strip 102 for connecting with a guide rail is installed at the bottom of the base body 101 to facilitate the overall operation of the base body 101 driving four chain tool magazine devices 200. A screw rod mounting seat 103 connected to a screw rod is also installed at the center of the bottom of the base body 101 to facilitate the connection with the screw rod for driving the overall movement of the base body 101.

[0029] Four chain tool magazine devices 200 are installed on the mobile base 100 in parallel and at intervals. Each chain tool magazine device 200 includes an independent frame 210. The frame 210 is fixed on the base body 101 of the mobile base 100. Two sprockets 223 are installed at the front and rear ends of the frame 210 in parallel and at intervals. One of the sprockets 223 is connected to a drive assembly 220. The drive assembly 220 includes a chain drive motor 221 and a planetary reducer 222. The planetary reducer 222 is installed below the sprocket 223 and connected to the sprocket 223. The chain drive motor 221 is connected to the planetary reducer 222. The planetary reducer 222 and the chain drive motor 221 can both be built into the tool magazine, which can save a lot of space.

[0030] Two sprockets 223 are connected by an endless chain 240. The chain 240 is a double-row composite chain to improve the strength of the chain 240. A lower annular guide strip 250 is installed on the outer periphery below the endless chain 240 on the frame 210. A plurality of evenly spaced cutter claw assemblies 230 are installed on the endless chain 240. The cutter claw assembly 230 includes a cutter claw seat 231. The cutter claw seat 231 is fixed on the chain 240. An upper guide bearing 232 is installed at the rear end of the cutter claw seat 231. Two symmetrically distributed clamping arms 233 are fixed on the cutter claw seat 231 through a rotating pin shaft 234. A strong spring 235 is installed between the rear ends of the two clamping arms 233. A guide strip docking block 236 is installed below the cutter claw seat 231. The guide strip docking block 236 is inserted into the lower annular guide strip 250 located below the endless chain 240. An upper guide cover 2110 covers the upper part of the frame 210. An annular guide groove is provided in the upper guide cover 2110. The upper guide bearings 232 provided on each cutter claw assembly 230 are all embedded in the annular guide groove provided in the upper guide cover 2110. A proximity switch mounting seat 260 is installed on one side of the front end of the endless chain 240 on the frame 210. A proximity switch 270 corresponding to the cutter claw assembly 230 is installed on the proximity switch mounting seat 260. During actual operation, it is possible to determine whether a cutter 280 is present on the corresponding cutter claw assembly 230 through the proximity switch 270, so as to provide a discrimination signal for tool change of the main shaft. A chain adjustment block 290 for adjusting the chain tension is also installed on the frame 210. When the chain 240 becomes loose, the tension of the chain 240 can be adjusted only by adjusting the chain adjustment block 290, which is convenient to operate.

[0031] The present invention uses four independent and parallelly spaced chain tool magazine devices 200 on the same moving base 100. Each chain tool magazine device 200 can correspond to provide a tool magazine for a main shaft. The overall tool magazine adopts a chain structure, which not only makes the structural layout of the tool magazine more compact, but also greatly increases the capacity of the tool magazine, and can meet the tool change requirements for simultaneous independent machining of a four-spindle heavy cutting machine. Through the structural design of the cutter claw assembly 230, the present invention adopts a cutter claw structure design with elastic double arms for automatic opening and closing. During actual operation, the strong spring 235 installed between the rear ends of the two clamping arms 233 is used to push the clamping arms 233 to clamp the tool. When the main shaft takes the tool, the tool can be taken out from the clamping arms 233 only by overcoming the thrust of the strong spring 235. This not only simplifies the structure of the cutter claw, but also greatly facilitates the tool loading and tool taking operations.

[0032] Through the structural design of the upper and lower guides of the tool magazine, the upper part of the tool magazine is limited by embedding the upper guide bearings 232 provided on each tool jaw assembly 230 into the annular guide grooves provided in the upper guide cover 2110. The lower part of the tool magazine is limited by inserting the guide bar docking blocks 236 provided on each tool jaw assembly 230 into the lower annular guide bar 250 located below the annular chain 240, which will limit all directions when the chain 240 drives the movement of each tool jaw assembly 230. Even if the chain 240 becomes loose during use, it will not affect the positioning accuracy of each tool jaw assembly 230, thereby improving the operating accuracy of the entire tool magazine.

[0033] The above is the preferred embodiment of the present invention, but the present invention should not be limited to the content disclosed in this embodiment and the drawings. Therefore, all equivalent or modified implementations completed without departing from the spirit disclosed by the present invention fall within the protection scope of the present invention.

Claims

1. A fully automatic chain tool magazine, characterized in that Comprising: A moving base, on which a plurality of chain tool magazines are installed in parallel and spaced apart. Each chain tool magazine device includes an independent frame fixed on the moving base. At the front and rear ends of the frame, two sprockets are installed in parallel and spaced apart. One of the sprockets is connected to a driving component, and the two sprockets are connected by an endless chain. Below the periphery of the endless chain on the frame, a lower annular guide bar is installed. A plurality of uniformly spaced tool claw assemblies are installed on the endless chain. The tool claw assembly includes a tool claw seat fixed on the chain. An upper guide bearing is installed at the rear end of the tool claw seat. Two symmetrically distributed clamping arms are fixed on the tool claw seat by a rotating pin shaft. A strong spring is installed between the rear ends of the two clamping arms. A guide bar docking block is installed below the tool claw seat, and the guide bar docking block is inserted into the lower annular guide bar located below the endless chain. An upper guide cover covers the upper part of the frame. An annular guide groove is provided in the upper guide cover, and the upper guide bearings provided on each tool claw assembly are embedded in the annular guide groove provided in the upper guide cover.

2. The fully automatic tool magazine of the numerically controlled four-spindle heavy cutting machine according to claim 1, characterized in that: The moving base includes a base body, and a guide rail limit docking bar for connecting with a guide rail is installed at the bottom of the base body.

3. The full-automatic tool magazine of the numerically controlled four-spindle heavy cutting machine according to claim 2, wherein: A lead screw mounting seat connected to a lead screw is also installed at the center of the bottom of the base body.

4. The fully automatic tool magazine of the numerically controlled four-spindle heavy cutting machine according to claim 1, characterized in that: The driving component includes a chain driving motor and a planetary reducer. The planetary reducer is installed below the sprocket and connected to the sprocket, and the chain driving motor is connected to the planetary reducer.

5. The full-automatic tool magazine of the numerically controlled four-spindle heavy cutting machine according to claim 1, characterized in that: A proximity switch mounting seat is installed on one side of the front end of the endless chain on the frame, and a proximity switch corresponding to the tool claw assembly is installed on the proximity switch mounting seat.

6. The full-automatic tool magazine of the numerically controlled four-spindle heavy cutting machine according to claim 1, characterized in that, A chain adjusting block for adjusting the chain tension is also installed on the frame.

7. The full-automatic tool magazine of the numerically controlled four-spindle heavy cutting machine according to claim 1, characterized in that, The chain is a double-row composite chain.

Images