Composite machine tool with auxiliary tool magazine and tool changing method

Abstract

The invention relates to the technical field of composite machine tools, and discloses a composite machine tool with an auxiliary tool magazine, the composite machine tool comprises a machine tool base, the left end and the right end of the machine tool base are provided with vertical seats, the vertical seats are provided with spindle boxes capable of lifting in the Z direction, the top surface of the machine tool base is provided with a sliding table capable of feeding in the X direction and the Y direction, and the side surface of the sliding table is provided with the auxiliary tool magazine; the auxiliary tool magazine comprises a connecting seat, a tool rest disc arranged on the connecting seat, and a plurality of tool storage positions arranged around the tool rest disc and used for storing tools; one end of the connecting seat is fixedly connected with the sliding Y-direction inner end; the bottom of the tool rest disc is provided with rotating power used for driving the tool rest disc to rotate; at least one of the two spindle boxes is configured to be a vertical spindle box; the invention further discloses a tool changing method. The automatic tool changing device has the beneficial effects that overweight and oversized tools can be stored, automatic tool changing is achieved, and the tool changing efficiency is greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of compound machine tools, and particularly relates to a compound machine tool with an auxiliary tool magazine and a tool changing method. Background Art

[0002] Compound machine tools belong to a type of multitasking machine tools, which usually integrate various machining functions such as turning, milling, and boring, and can complete multiple machining operations in one clamping, thereby reducing the number of clampings and improving the accuracy and machining efficiency. Especially for the machining of very heavy parts, the efficiency improvement brought by reducing the number of clampings is more obvious. As Figure 11 shown is a large boring tool, the maximum length of which is 695 mm and the weight of a single tool reaches 35 Kg. It belongs to an overweight and oversized tool. Usually, multiple tools are installed in a tool magazine, and the total weight of the tool magazine and the tools can reach about 800 Kg. Currently, the maximum tool load of a standard BT50 tool magazine is 15 Kg, and the maximum tool disc diameter is 220 mm, which cannot meet the storage of such overweight and oversized tools. In the actual machining process, currently, manual tool changing is carried out. Due to the very large weight of the tool, usually two or three people are required to change the tool together, and the labor intensity of tool changing is very high. Moreover, if the cooperation is not coordinated during the tool changing process, the tool may fall onto the workbench, causing damage to the workbench, slide rails, etc. Summary of the Invention

[0003] In order to solve the above problems existing in the prior art, the present invention provides a compound machine tool with an auxiliary tool magazine and a tool changing method that can store overweight and oversized tools, realize automatic tool changing, and greatly improve the tool changing efficiency and tool changing safety.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions: A compound machine tool with an auxiliary tool magazine, the compound machine tool includes a machine tool base, vertical seats are provided at both the left and right ends of the machine tool base, a spindle box capable of lifting in the Z direction is provided on each vertical seat, a slide table capable of feeding in the X and Y directions is provided on the top surface of the machine tool base, and an auxiliary tool magazine is provided on the side of the slide table; the auxiliary tool magazine includes a connecting seat, a tool rack disc provided on the connecting seat, and a plurality of tool storage positions for storing tools provided around the tool rack disc. One end of the connecting seat is fixedly connected to the inner end of the sliding Y direction, and a rotation power for driving the tool rack disc to rotate is provided at the bottom of the tool rack disc; at least one of the two spindle boxes is configured as a vertical spindle box, and the rotation axis of each tool in the tool storage position is parallel to the axis of the vertical spindle box.

[0005] By adopting the above technical solution: a secondary tool magazine is arranged on the side of the sliding table, and the rotation axis of the tool is set to be parallel to the main shaft of the vertical spindle box. The tool is directly moved to the position directly below the main shaft of the vertical spindle box by the X-direction and Y-direction movement of the sliding table. Then, the vertical spindle box descends to connect the main shaft with the tool to achieve rapid tool picking. In a conventional machine tool tool magazine, when installing large-size tools, the weight is overweight and the rigidity of the tool magazine is insufficient and it will deform. When installing oversize large-size tools, there will be interference with the machine tool spindle. In this structure, through structural improvement, the clamping rigidity of the tool is improved and the storage of super-large tools is realized through structural improvement. The secondary tool magazine is directly installed on the sliding table. The sliding table has a large load-bearing capacity, and the tool change is realized by using the X-direction / Y-direction feed of the sliding table itself and the Z-direction lifting of the spindle box itself, eliminating manual tool change and also eliminating tool change by using a robot, greatly improving the convenience and safety of tool change.

[0006] Preferably, a rotary table for workpiece positioning is arranged on the top surface of the sliding table. Installing a rotary table on the sliding table and cooperating with the double spindle boxes of the composite machine tool greatly improves the convenience and versatility of workpiece processing.

[0007] Preferably, a sliding seat is arranged on the connecting seat, the rotary power is arranged on the sliding seat, and a translational power for driving the sliding seat to move along the Y-direction is arranged on the connecting seat. The translational power can drive the sliding seat to move along the Y-direction. On the one hand, during the processing, the sliding seat can be moved to prevent interference between the workpiece and the secondary tool magazine; on the other hand, during tool change, the translational power is directly used to move the sliding seat in the Y-direction, so that the tool in the secondary tool magazine can be quickly moved to the position directly below the main shaft of the vertical spindle box, improving the tool change efficiency.

[0008] Preferably, the sliding seat and the connecting seat are connected by a slide rail and a slider. The translational power is configured as any one of a motor, a cylinder, and an oil cylinder. The rotary power is configured as a motor, and the shaft end of the translational power is connected to the sliding seat.

[0009] Preferably, a tool positioning component is arranged at each tool storage position on the tool rack plate. The tool positioning component includes two clamping arms symmetrically distributed. The middle of the clamping arms is rotatably connected to the tool rack plate. An elastic member for driving the outer ends of the clamping arms to contract and clamp the tool is arranged between the inner ends of the clamping arms. A clamping groove for clamping and limiting the tool handle is formed between the outer ends of the two clamping arms. A limiting block for engaging with the keyway on the tool handle is arranged at the position at the bottom of the clamping groove on the tool rack plate. The tool and the tool positioning component can be quickly separated and connected by Y-direction translation, which is very convenient to use.

[0010] Preferably, a protective cover is provided on the upper side of the tool rest disk. A relief opening is provided on the side surface of the outer end in the Y direction of the protective cover, and a spindle relief groove communicating with the relief opening is provided on the top surface of the outer end in the Y direction of the protective cover. Since the auxiliary tool magazine is arranged on the slide table, metal chips generated during the workpiece machining process are likely to remain on the tool shank. The protective cover can prevent the metal chips from falling onto the tool shank. The relief opening can, on the one hand, avoid the workpiece and prevent the interference between the workpiece and the protective cover; on the other hand, it is convenient for the tool to be separated from the auxiliary tool magazine. The spindle relief groove is convenient for the spindle to descend and directly connect to the tool shank of the tool.

[0011] Preferably, an empty tool position is provided at the edge of the tool rest disk, and a baffle for closing the spindle relief groove is provided at the empty tool position; when the rotational power drives the tool rest disk to rotate so that the empty tool position is directly below the spindle relief groove, the spindle relief groove is closed by the baffle. By providing a baffle at the empty tool position, during the workpiece machining process, when the empty tool position rotates to correspond to the spindle relief groove, the baffle closes the spindle relief groove, thereby preventing metal chips from entering the tool from the spindle relief groove.

[0012] A tool changing method applicable to the compound machine tool includes the following steps: when tool changing is required, the rotational power drives the tool rest disk to rotate so that the tool to be replaced rotates to the spindle relief groove; at the same time, the feed power of the compound machine tool itself is used to drive the slide table to move in the X and Y directions, so that the tool in the spindle relief groove moves to be coaxial with the spindle of the vertical spindle box; the lifting power of the compound machine tool itself is used to drive the vertical spindle box to descend, and the spindle descends to connect with the tool in the spindle relief groove; the feed power of the compound machine tool itself is used to drive the slide table to move inward in the Y direction, so that the tool is separated from the auxiliary tool magazine from the relief opening, realizing tool changing; then the rotational power drives the tool rest disk to rotate until the baffle closes the spindle relief groove. In this tool changing process, the X and Y direction movements of the slide and the Z direction lifting of the spindle box are fully utilized to connect the spindle with the tool shank, and the separation of the tool from the auxiliary tool magazine is realized through the Y direction movement of the slide table.

[0013] A tool changing method is applicable to the compound machine tool, comprising the following steps: when the tool needs to be changed, the rotary power drives the tool holder to rotate so that the tool to be replaced moves into the spindle clearance groove, and at the same time, the feed power of the compound machine tool is used to drive the slide to move along the X direction, so that the axis of the tool in the spindle clearance groove is coplanar with the axis of the spindle in the Y direction; the sliding seat is driven to move toward the outer end in the Y direction by the translational force, so that the axis of the tool in the spindle clearance groove moves to be colinear with the spindle; the vertical spindle box is driven to descend by the lifting power of the compound machine tool, and the spindle is descended to connect with the tool in the spindle clearance groove; the sliding seat is driven to move toward the inner end in the Y direction by the translational force, so that the tool is separated from the auxiliary tool magazine from the clearance port to realize the tool change; and then the rotary power is used to drive the tool holder to rotate until the baffle plate closes the spindle clearance groove. In this tool changing process, the sliding X-axis movement, the Y-axis movement of the translational force, and the Z-axis lifting of the spindle box are utilized to connect the spindle with the tool holder, and the Y-axis movement of the translational force is used to separate the tool from the auxiliary tool magazine. Since the feed speed of the slide in the X-axis and Y-axis is very slow, the Y-axis movement of the auxiliary tool magazine is driven by the translational force, which can reduce the invalid Y-axis travel of the slide and greatly improve the tool changing speed.

[0014] Therefore, the present invention has the following beneficial effects: (1) the auxiliary tool magazine is installed on the side of the slide, and oversized and overweight tools can be installed in the auxiliary tool magazine to improve the processing performance of the compound machine tool; (2) the X-direction and Y-direction movement of the slide in the compound machine tool and the Z-direction lifting of the spindle box are utilized to realize automatic tool change, which greatly reduces the modification cost of the compound machine tool; (3) the Y-direction movement is realized by utilizing the translational force, which further improves the tool change efficiency; (4) the auxiliary tool magazine is in a closed state when not in use, which prevents metal chips generated during the workpiece processing from entering the tool handle and affecting the connection between the spindle and the tool handle. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A structural schematic diagram of the present invention.

[0016] Figure 2 It is a schematic diagram of the state of taking tools from the auxiliary tool magazine after the vertical spindle box is lowered.

[0017] Figure 3 This is a connection diagram for the auxiliary tool magazine, slide, and machine tool base.

[0018] Figure 4 This is a connection diagram of the rotary worktable, slide, and auxiliary tool magazine.

[0019] Figure 5 This is a schematic diagram of the structure of the auxiliary tool magazine.

[0020] Figure 6 for Figure 5 Sectional view at AA.

[0021] Figure 7 Exploded view of the auxiliary tool magazine.

[0022] Figure 8 is Figure 7 Another perspective view of

[0023] Figure 9 Schematic diagram of the tool installed on the tool rest disc.

[0024] Figure 10 Top view of the tool rest disc.

[0025] Figure 11 Schematic diagram of a boring tool structure that is overweight and oversized. Specific implementation mode

[0026] In order to make the technical problems, technical solutions, and beneficial technical effects to be solved by the present invention clearer and more understandable, the present invention will be further described in detail below in conjunction with the drawings and multiple exemplary embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the protection scope of the present invention.

[0027] It should be understood that in this article, expressions such as "first" and "second" are only used for descriptive purposes, and should not be construed as indicating or implying relative importance, nor should they be construed as implicitly indicating the quantity of the indicated technical features. Features defined with "first" and "second" may explicitly or implicitly include at least one of the features.

[0028] Such as Figures 1-10 A compound machine tool with an auxiliary tool magazine as shown. The compound machine tool 1 includes a machine tool base 10. Vertical seats 11 are provided at both the left and right ends of the machine tool base 10. Spindle boxes 13 that can be lifted in the Z direction are provided on the vertical seats 11. A slide table 14 that can feed in the X and Y directions is provided on the top surface of the machine tool base 10. An auxiliary tool magazine 2 is provided on the side of the slide table 14; the auxiliary tool magazine 2 includes a connecting seat 20, a tool rest disc 21 provided on the connecting seat 20, and a plurality of tool storage positions 210 provided around the tool rest disc 21 for storing tools 3. One end of the connecting seat 20 is fixedly connected to the inner end of the sliding Y direction. A rotation power 22 for driving the tool rest disc 21 to rotate is provided at the bottom of the tool rest disc 21; at least one of the two spindle boxes 13 is configured as a vertical spindle box 130, and the rotation axis of each tool in the tool storage position 210 is parallel to the axis of the vertical spindle box 130.

[0029] In this embodiment, one of the spindle boxes 13 is configured as a vertical spindle box 130, and the other spindle box 13 is configured as a horizontal spindle box 131; main tool magazines 12 are provided on the vertical seats 11. A rotary worktable 15 for workpiece positioning is provided on the top surface of the slide table 14.

[0030] Such as Figures 6-8As shown in the figure, a sliding seat 23 is provided on the connecting seat 20, a rotational power source 22 is arranged on the sliding seat 23, and a translational power source 24 for driving the sliding seat 23 to move along the Y direction is provided on the connecting seat 20. The sliding seat 23 and the connecting seat 20 are connected by a slide rail and a slider. The translational power source 24 is configured as any one of a motor, a cylinder, and an oil cylinder, the rotational power source 22 is configured as a motor, and the shaft end of the translational power source 24 is connected to the sliding seat 23. In this embodiment, the translational power source is configured as a cylinder.

[0031] On each tool storage position 210 of the tool carrier disk 21, a tool positioning assembly 25 is provided. The tool positioning assembly 25 includes two clamping arms 250 symmetrically distributed. The middle of the clamping arms 250 is rotatably connected to the tool carrier disk 21. An elastic member 251 for driving the outer ends of the clamping arms 250 to contract and clamp the tool is provided between the inner ends of the clamping arms 250. A clamping groove 252 for clamping and limiting the tool shank is formed between the outer ends of the two clamping arms 250. A limiting block 253 for engaging with the keyway on the tool shank is provided at the position of the tool carrier disk 21 at the bottom of the clamping groove 252. A protective cover 26 is provided on the upper side of the tool carrier disk 21. The protective cover 26 is installed on the sliding seat through a bracket 28. A relief opening 260 is provided on the side surface of the outer end of the protective cover 26 in the Y direction, and a spindle relief groove 261 communicating with the relief opening 260 is provided on the top surface of the outer end of the protective cover 26 in the Y direction. An empty tool position 211 is provided at the edge of the tool carrier disk 21, and a baffle 27 for closing the spindle relief groove 261 is provided at the empty tool position 211; when the rotational power source 22 drives the tool carrier disk 21 to rotate so that the empty tool position 211 is directly below the spindle relief groove 261, the spindle relief groove 261 is closed by the baffle 27. In some embodiments, the elastic member 251 is a compression spring or an elastic sheet.

[0032] As Figure 9 and Figure 10 shown, the tool storage positions 210 on the tool carrier disk 21 are configured as 4, and four tools are respectively installed. A baffle is installed at an empty tool position 211, and the total weight of the auxiliary tool magazine reaches 800 Kg. When the auxiliary tool magazine is not in use, the state is as Figure 5 shown, and the baffle closes the spindle relief groove 261 on the protective cover 26 to prevent metal chips from entering the tool during the machining process.

[0033] A tool changing method comprises the following steps: when the tool needs to be changed, a rotary power 22 drives a tool holder disc 21 to rotate so that a tool 3 to be replaced rotates to a spindle clearance groove 261; at the same time, the feed power of a compound machine tool 1 is used to drive a slide 14 to move along the X direction and the Y direction, so that the tool 3 in the spindle clearance groove 261 moves to be coaxial with the spindle of a vertical spindle box 130; the lifting power of the compound machine tool 1 is used to drive the vertical spindle box 130 to descend, and the spindle descends to connect with the tool 3 in the spindle clearance groove 261; the feed power of the compound machine tool 1 is used to drive the slide 14 to move along the inner end of the Y direction, so that the tool is separated from the auxiliary tool magazine 2 at the clearance port 260, so as to realize tool changing; then, the rotary power 22 is used to drive the tool holder disc 21 to rotate to the baffle 27 to close the spindle clearance groove 261.

[0034] A tool changing method comprises the following steps: when the tool needs to be changed, the rotary power 22 drives the tool holder disc 21 to rotate so that the tool 3 to be replaced moves into the spindle clearance groove 261, and at the same time, the feed power of the compound machine tool 1 is used to drive the slide 14 to move along the X direction, so that the axis of the tool 3 in the spindle clearance groove 261 is coplanar with the axis of the spindle in the Y direction; the sliding seat 23 is driven to move toward the outer end in the Y direction by the translational force 24, so that the axis of the tool 3 in the spindle clearance groove 261 moves to be colinear with the spindle; the vertical spindle box 130 is driven to descend by the lifting power of the compound machine tool 1, and the spindle is descended to connect with the tool 3 in the spindle clearance groove 261; the sliding seat 23 is driven to move toward the inner end in the Y direction by the translational force 24, so that the tool is separated from the auxiliary tool magazine 2 at the clearance port 260, so as to realize the tool change; then, the rotary power 22 is used to drive the tool holder disc 21 to rotate until the baffle 27 closes the spindle clearance groove 261.

[0035] The above two tool changing methods are for taking out the tool when there is no tool on the spindle of the vertical spindle box. When the spindle of the vertical spindle box is equipped with a tool, the tool needs to be put back into the main tool magazine or the auxiliary tool magazine first, and then the tool is taken out according to the above method: if the tool is in the main tool magazine, the tool is put back into the main tool magazine in the normal way (all CNC machine tools can realize automatic tool change between the main tool magazine and the main tool magazine); if the tool is in the auxiliary tool magazine, the empty tool positioning assembly is first rotated to the spindle clearance slot, the spindle with the tool is lowered to the preset position, the tool holder moves along the Y direction to the outer end so that the clamping groove in the tool positioning assembly clamps the tool, the vertical spindle box rises and separates from the tool, and the tool enters the auxiliary tool magazine.

[0036] This type of compound machine tool is equipped with an auxiliary tool magazine that can store overweight and oversized tools to meet the composite processing of large parts; it saves the workload of manual tool replacement and the resulting safety hazards.

[0037] In the description of the present invention, it should be understood that the directions or positional relationships indicated by up and down, left and right, inner end, outer end, one end, the other end, etc. are based on the orientation or positional relationship shown in the drawings, and are only for more clearly facilitating the description of the technical solution of the present invention, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific orientation, and should not be construed as a limitation to the present invention.

[0038] Although specific embodiments of the present invention are described in detail herein, they are given for purposes of explanation only and should not be considered as limiting the scope of the present invention. Various substitutions, alterations and modifications can be conceived without departing from the spirit and scope of the present invention.

Claims

1. A composite machine tool with an auxiliary tool magazine, the composite machine tool (1) comprising a machine tool base (10), both left and right ends of the machine tool base (10) are provided with a stand (11), each of the stand (11) is provided with a spindle box (13) which can be lifted in the Z direction, wherein: The top surface of the machine tool base (10) is provided with a slide table (14) capable of feeding in the X direction and the Y direction, and the side surface of the slide table (14) is provided with an auxiliary tool magazine (2); The auxiliary tool magazine (2) comprises a connecting seat (20), a tool holder disc (21) arranged on the connecting seat (20), and a plurality of tool storage positions (210) arranged around the tool holder disc (21) for storing tools (3); one end of the connecting seat (20) is fixedly connected to the Y-direction inner end of the slide; and a rotating power (22) for driving the tool holder disc (21) to rotate is provided at the bottom of the tool holder disc (21); At least one of the two spindle boxes (13) is configured as a vertical spindle box (130), and the rotation axis of each tool in the tool storage position (210) is parallel to the axis of the vertical spindle box (130).

2. A compound machine tool with an auxiliary tool magazine according to claim 1, characterized in that: The top surface of the slide table (14) is provided with a rotating worktable (15) for positioning a workpiece.

3. A compound machine tool with an auxiliary tool magazine according to claim 1 or 2, characterized in that: A sliding seat (23) is provided on the connecting seat (20), the rotating power (22) is arranged on the sliding seat (23), and a translational power (24) is provided on the connecting seat (20) for driving the sliding seat (23) to move along the Y direction.

4. A compound machine tool with an auxiliary tool magazine according to claim 3, characterized in that: The sliding seat (23) and the connecting seat (20) are connected via a sliding rail and a sliding block; the translational force (24) is configured as any one of a motor, a cylinder, and an oil cylinder; the rotational force (22) is configured as a motor; and the shaft end of the translational force (24) is connected to the sliding seat (23).

5. The compound machine tool with auxiliary tool magazine according to claim 3 is characterized in that: Each tool storage position (210) on the tool holder disc (21) is provided with a tool positioning assembly (25), the tool positioning assembly (25) comprising two symmetrically distributed clamping arms (250), the middle of the clamping arms (250) being rotatably connected to the tool holder disc (21), an elastic member (251) for driving the outer ends of the clamping arms (250) to contract and clamp the tool is provided between the inner ends of the clamping arms (250), a clamping groove (252) for clamping and limiting the tool handle is formed between the outer ends of the two clamping arms (250), and a limiting block (253) for clamping with a keyway on the tool handle is provided at a position at the bottom of the clamping groove (252) on the tool holder disc (21).

6. A compound machine tool with an auxiliary tool magazine according to claim 5, characterized in that: A protective cover (26) is provided on the upper side of the tool holder disc (21); a clearance opening (260) is provided on the side surface of the Y-direction outer end of the protective cover (26); and a main shaft clearance groove (261) that is in communication with the clearance opening (260) is provided on the top surface of the Y-direction outer end of the protective cover (26).

7. A compound machine tool with an auxiliary tool magazine according to claim 6, characterized in that: An empty tool position (211) is provided at the edge of the tool holder disc (21), and a baffle (27) for closing a spindle clearance groove (261) is provided at the empty tool position (211); when the rotary power (22) drives the tool holder disc (21) to rotate so that the empty tool position (211) is located directly below the spindle clearance groove (261), the spindle clearance groove (261) is closed by the baffle (27).

8. A tool changing method, applicable to the compound machine tool (1) according to any one of claims 1 to 7, characterized in that: The following steps are involved: When the tool needs to be changed, the rotary power (22) drives the tool holder (21) to rotate so that the tool (3) to be changed is rotated to the spindle clearance groove (261); at the same time, the feed power of the compound machine tool (1) is used to drive the slide (14) to move along the X direction and the Y direction, so that the tool (3) in the spindle clearance groove (261) moves to be coaxial with the spindle of the vertical spindle box (130); The vertical spindle box (130) is driven to descend by the lifting power of the composite machine tool (1), and the spindle is lowered until it is connected with the tool (3) in the spindle clearance groove (261); The feed power of the composite machine tool (1) is used to drive the slide (14) to move inward along the Y direction, so that the tool is separated from the auxiliary tool magazine (2) at the clearance opening (260) to achieve tool change; then, the tool holder disc (21) is driven by the rotary power (22) to rotate to the baffle plate (27) to close the spindle clearance groove (261).

9. A tool changing method, applicable to the compound machine tool according to any one of claims 1 to 7, characterized in that: The following steps are involved: When the tool needs to be changed, the rotary power (22) drives the tool holder (21) to rotate so that the tool (3) to be changed is moved into the spindle clearance groove (261), and at the same time, the feed power of the compound machine tool (1) is used to drive the slide (14) to move along the X direction so that the axis of the tool (3) in the spindle clearance groove (261) is coplanar with the axis of the spindle in the Y direction; The sliding seat (23) is driven to move toward the outer end in the Y direction by the translational force (24), so that the axis of the tool (3) in the spindle clearance groove (261) moves to be in line with the spindle; The vertical spindle box (130) is driven to descend by the lifting power of the composite machine tool (1), and the spindle is lowered until it is connected with the tool (3) in the spindle clearance groove (261); The sliding seat (23) is driven to move inward in the Y direction by the translational force (24), so that the tool is separated from the auxiliary tool magazine (2) at the clearance opening (260), thereby realizing tool change; then, the tool holder disc (21) is driven to rotate to the baffle plate (27) by the rotational force (22) to close the spindle clearance groove (261).

Images