Tool changing device for spindle of numerical control machine tool

Abstract

The invention provides a numerical control machine tool spindle tool changing device which comprises a frame body which is of a rectangular structure, is installed between a tool bit and a tool magazine in a sliding mode and comprises two parallel side plates and an end plate connected between the two side plates. The number of the sliding blocks is two, and each sliding block comprises a semicircular base body part and an arc-shaped outer edge part. A mounting hole used for being in butt joint with a cutter is formed in the base body part; guide grooves are respectively formed in the two side plates corresponding to the outer edge parts; the driving mechanism comprises a reciprocating driving assembly, a reversing driving assembly and a lifting driving assembly, wherein the reciprocating driving assembly and the reversing driving assembly are arranged on the side plates, and the lifting driving assembly is arranged on the end plate. The rectangular frame body is arranged and is installed between the tool bit and the tool magazine in a sliding mode, it can be guaranteed that the sliding block can be in butt joint with the tool bit in the tool changing process, and the tool bit can be avoided after tool changing; wherein the reversing driving assembly drives the two sliding blocks to rotate and change positions, the lifting driving assembly drives the sliding blocks to vertically slide, large-range horizontal rotation of a traditional mechanical arm is avoided, and the horizontal space needed for tool changing is remarkably reduced.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of machining, in particular to a spindle tool changer of a numerical control machine tool. BACKGROUND

[0002] The traditional machining center tool changer on the market has a separate tool changer control system, and the tool changing process is the same despite the different types of tool magazines of the numerical control machining center; when the automatic tool changer receives a tool changing instruction, the spindle immediately stops rotating and stops at the tool changing position, and the tool is loosened; then the tool magazine selects a tool, the new tool moves to the tool changing position with the tool magazine, the tool magazine is loosened; the tool changer arm simultaneously picks up the new and old tools on the tool magazine and the spindle, and after the tool changer rotates to the position, the new and old tools are respectively rotated to the spindle and the empty position of the tool magazine; then the spindle clamps the tool, and the tool changer arm returns to the original position to achieve the purpose of tool changing.

[0003] The existing automatic tool changer clamps the tool by a mechanical hand, and then rotates by 180 degrees in the horizontal direction to complete the entire tool changing process; this requires a large horizontal space for the automatic tool changer, which cannot realize automatic tool changing in a production workshop with limited space or a compact machine tool, and cannot meet the needs of small production workshops and compact machine tools. SUMMARY

[0004] In view of the above defects or deficiencies in the prior art, it is desirable to provide a spindle tool changer of a numerical control machine tool.

[0005] The application provides a spindle tool changer of a numerical control machine tool, which comprises a frame body, the frame body is in a rectangular structure, is slidingly installed between a tool head and a tool magazine, and comprises two side plates parallel to each other and an end plate connected between the two side plates; two sliding blocks, each sliding block comprises a base body portion in a semicircular shape and an outer edge portion in an arc shape; the base body portion is provided with a mounting hole for butt joint with a tool; the two side plates are respectively provided with a guide groove corresponding to the outer edge portion, for butt joint with the sliding blocks and limiting the sliding direction; a driving mechanism, the driving mechanism comprises a reciprocating driving assembly and a reversing driving assembly provided on the side plates, and a lifting driving assembly provided on the end plate; the reversing driving assembly is located at the middle of the side plate, for driving the two sliding blocks to rotate and reverse; the reciprocating driving assemblies are respectively located on the two sides of the reversing driving assembly, for driving the corresponding sliding blocks to slide in the horizontal direction; the lifting driving assembly is located above the reciprocating driving assembly, for driving the sliding blocks to slide in the vertical direction.

[0006] Further, The reciprocating driving assembly comprises a bidirectional screw rod located inside the two side plates respectively and a driving block mounted on the bidirectional screw rod; Two ends of the bidirectional screw rod are respectively provided with external threads with opposite rotation directions; The driving block is respectively sleeved at the two ends of the bidirectional screw rod and is in threaded connection with the bidirectional screw rod.

[0007] Further, The bidirectional screw rod is located below the guide groove; The guide groove and the bidirectional screw rod are further provided with a strip-shaped hole for communication; The driving block is located in the strip-shaped hole and is used for abutting against the sliding block.

[0008] Further, The driving block is provided with a first electromagnet, which is used for forming a controllable connection with the sliding block; The top surface of the electromagnet is provided with a matching arc-shaped groove corresponding to the outer edge portion, which is used for forming a positioning connection with the sliding block.

[0009] Further, The reversing driving assembly comprises a worm rotatably mounted on the side plate; The extension direction of the worm is parallel to the extension direction of the side plate, which is used for driving the sliding block to rotate; The sliding block is provided with a matching worm gear corresponding to the worm, and a worm and gear structure is formed between the worm and the sliding block.

[0010] Further, The worm comprises a coaxial worm shaft and a worm thread; The cross section of the worm shaft comprises a first semicircular portion and a second semicircular portion; The worm thread is arranged on the first semicircular portion, which can abut against the sliding block through the first semicircular portion and can be separated from the sliding block through the second semicircular portion.

[0011] Further, The inside of the side plate is provided with a mounting cavity for mounting the worm; Two ends of the mounting cavity are provided with bearing seats for mounting the worm, and a communication hole is arranged in the middle; The communication hole is located on the side of the mounting cavity close to the sliding block, which is used for abutting the worm thread against the sliding block.

[0012] Further, The lifting driving assembly comprises an abutting block matched with the sliding block; The butt joint block is arc-shaped on one side close to the slider, and a second electromagnet is arranged corresponding to the slider, for forming controllable connection with the slider. A slide table air cylinder is arranged on the end plate corresponding to the butt joint block, for driving the butt joint block to move up and down.

[0013] Further, An up-and-down sliding groove is arranged at the end of the side plate corresponding to the slider. The up-and-down sliding groove is arc-shaped, and the radius thereof matches the radius of the outer edge portion. The butt joint block is arranged in the up-and-down sliding groove, for butt joint with the base portion.

[0014] Further, The outer edge portion is flat on one end close to the end plate. The flat surface is parallel to the end plate, for abutting positioning with the end plate.

[0015] The application has the advantages and positive effects that: The rectangular frame body is arranged between the tool head and the tool magazine, which can ensure that the slider can be butt jointed with the tool head during tool changing, and can be avoided after tool changing. Meanwhile, the two sliders are used to cooperate with the driving mechanism to effectively realize the integrated layout of the tool changing process. The reciprocating driving assembly drives the slider to slide horizontally, the reversing driving assembly drives the two sliders to rotate and change position, and the lifting driving assembly drives the slider to slide vertically, which avoids the large-scale horizontal rotation of the traditional mechanical hand, significantly reduces the horizontal space required for tool changing, and is particularly suitable for production environments with limited space or compact numerical control machine tools. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 A structure schematic view of the numerical control machine tool spindle tool changer provided by the embodiment of the application is shown in the figure; Figure 2 A structure schematic view of the side wall of the numerical control machine tool spindle tool changer provided by the embodiment of the application is shown in the figure; Figure 3 A structure schematic view of the end plate of the numerical control machine tool spindle tool changer provided by the embodiment of the application is shown in the figure; Figure 4 A structure schematic view of the guide groove of the numerical control machine tool spindle tool changer provided by the embodiment of the application is shown in the figure; Figure 5 A structure schematic view of the slider of the numerical control machine tool spindle tool changer provided by the embodiment of the application is shown in the figure; Figure 6 A structure schematic view of the butt joint block of the numerical control machine tool spindle tool changer provided by the embodiment of the application is shown in the figure.

[0017] The text annotations in the figure are as follows: 100-frame body; 110-side plate; 111-guide groove; 120-end plate; 200-sliding block; 210-mounting hole; 300-bidirectional screw rod; 310-driving block; 400-worm; 500-docking block; 510-sliding table cylinder. DETAILED DESCRIPTION

[0018] In order to make the skilled in the art better understand the technical solutions of the present application, the present application will be described in detail below in conjunction with the drawings, and the description in this part is only exemplary and explanatory, and should not have any limiting effect on the protection scope of the present application.

[0019] Please refer to Figures 1-6 The embodiment provides a numerical control machine tool spindle tool changer, which comprises a frame body 100, the frame body 100 is in a rectangular structure, is slidingly installed between a tool head and a tool magazine, comprises two side plates 110 parallel to each other and an end plate 120 connected between the two side plates 110; two sliding blocks 200, the number of the sliding blocks 200 is two, comprising a semicircular base body part and an arc-shaped outer edge part; the base body part is provided with a mounting hole 210 for docking with a tool; the two side plates 110 are respectively provided with guide grooves 111 corresponding to the outer edge parts, for docking with the sliding blocks 200 and limiting the sliding direction; a driving mechanism, the driving mechanism comprises a reciprocating driving assembly and a reversing driving assembly arranged on the side plates 110 and a lifting driving assembly arranged on the end plate 120; the reversing driving assembly is located at the middle of the side plates 110, for driving the two sliding blocks 200 to rotate and reverse; the reciprocating driving assemblies are respectively located on the two sides of the reversing driving assembly, for driving the corresponding sliding blocks 200 to slide in the horizontal direction; the lifting driving assembly is located above the reciprocating driving assemblies, for driving the sliding blocks 200 to slide in the vertical direction.

[0020] In the embodiment, the frame body 100 constitutes the support and movement basis of the whole device; it is designed as a rectangular frame structure with good rigidity, which enables it to be stably slidingly installed on a specific track or sliding seat between the spindle tool head and the tool magazine of the numerical control machine tool; the frame body 100 is specifically composed of two side plates 110 arranged parallel to each other and two end plates 120 connected between the end portions of the two side plates 110, forming a stable rectangular frame structure.

[0021] In this embodiment, the slider 200 is the key component of the device for directly grabbing and carrying the tool, and the number is two, allowing one slider to grab the old tool on the spindle and the other slider to grab the new tool in the tool magazine, so as to realize fast exchange; each slider 200 includes a main body part, i.e. a base part, which is configured in the shape of an approximate semicircle; and an outer edge part extending from the outer edge of the base part, which is arc-shaped; on the base part, a mounting hole 210 is precisely arranged for interfacing and locking with the shank part of the tool.

[0022] In this embodiment, in order to accurately guide the motion trajectory of the slider 200, a guide groove 111 matched with the outer edge part of the slider 200 is respectively machined on the two side plates 110; the slider 200 is embedded and supported in the guide groove 111 through the outer edge part, so that the guide groove 111 not only serves as a bearing track of the slider, but more importantly strictly limits the slider 200 to slide only in the extension direction of the guide groove 111.

[0023] In this embodiment, the driving mechanism is the power core for realizing the complex and coordinated motion of the slider 200, which is highly integrated on the frame 100; the driving mechanism includes three functionally different components, namely the reciprocating driving component and the reversing driving component arranged on the side plate 110, and the lifting driving component arranged on the end plate 120.

[0024] In this embodiment, the function of the reciprocating driving component is to drive the slider 200 to accurately and linearly reciprocate in the horizontal direction, i.e. the length direction of the guide groove 111; the component is provided with two groups, which are respectively located on the two sides of the reversing driving component; each group of reciprocating driving components is responsible for driving a corresponding slider 200, so that the two sliders 200 can respectively carry the old tool and the new tool to relatively approach or move away.

[0025] In this embodiment, the reversing driving component is responsible for driving the two sliders 200 to rotate, so as to realize the position exchange of the two sliders 200; the component is strategically arranged at the middle position of the side plate 110, so that it can effectively interact with the two sliders 200 moving to this position and drive them to rotate 180° around their own axes, thereby completing the position exchange of the new and old tools.

[0026] In this embodiment, the side of the two sliders 200 close to each other is respectively provided with a matching male plug and a female plug, so as to not only prevent the two sliders 200 from separating from each other during rotation, but also not to affect the separation of the two sliders after the position exchange is completed.

[0027] In this embodiment, the function of the lifting driving assembly is to drive the slider 200 to move in the vertical direction; since the lifting driving assembly is arranged on each of the two end plates 120, it can ensure that the two sliders 200 can independently realize the lifting action, thereby performing the action of inserting or pulling out the tool.

[0028] In a preferred embodiment, the reciprocating driving assembly comprises a bidirectional screw rod 300 arranged inside each of the two side plates 110 and a driving block 310 arranged on the bidirectional screw rod 300; the two ends of the bidirectional screw rod 300 are respectively provided with external threads with opposite rotation directions; the driving block 310 is respectively sleeved on the two ends of the bidirectional screw rod 300 and is in threaded connection with the bidirectional screw rod 300.

[0029] In this embodiment, the reciprocating driving assembly comprises a bidirectional screw rod 300 and a driving block 310.

[0030] In this embodiment, the bidirectional screw rod 300, as a core transmission component, is arranged inside each of the two side plates 110, and the axial direction thereof is parallel to the extension direction of the side plate 110 and the running direction of the guide groove 111; the two ends of the bidirectional screw rod 300 are respectively provided with external threads with opposite rotation directions, i.e., one end is a left-handed thread and the other end is a right-handed thread; this design makes the threads at the two ends of the bidirectional screw rod 300 generate opposite transmission directions when the bidirectional screw rod 300 rotates around its axis.

[0031] In this embodiment, the number of the driving blocks 310 corresponds to that of the sliders 200, which is two; they are respectively sleeved on the two ends of the bidirectional screw rod 300 and are in transmission connection with the bidirectional screw rod 300 through threads; specifically, one driving block 310 cooperates with the left-handed thread segment, and the other driving block 310 cooperates with the right-handed thread segment.

[0032] In this embodiment, when the bidirectional screw rod 300 is driven to rotate by the motor, since the threads at the two ends have opposite rotation directions, the two driving blocks 310 will generate synchronous and opposite linear motions along the axis of the bidirectional screw rod 300 under the driving of the threads; that is, when the bidirectional screw rod 300 rotates in one direction, the two driving blocks 310 approach each other; when the bidirectional screw rod 300 reversely rotates, the two driving blocks 310 move away from each other; The driving blocks 310 are configured to be in driving connection with the corresponding sliders 200; therefore, the reciprocating motion of the driving blocks 310 is ultimately transmitted to the sliders 200, thereby accurately driving the two sliders 200 to perform horizontal and synchronous reciprocating linear motions along the guide groove 111, realizing the stroke of approaching the reversing position or returning to the two-end working position; By adopting the design of a bidirectional screw rod synchronously driving two sliders, the embodiment ensures the synchronization and coordination of the movement of the two sliders 200, has compact structure, simple and reliable control, and provides accurate displacement basis for subsequent reversing action.

[0033] In a preferred embodiment, the bidirectional screw rod 300 is located below the guide groove 111; a strip-shaped hole for communication is further arranged between the guide groove 111 and the bidirectional screw rod 300; the driving block 310 is located in the strip-shaped hole and used for abutting against the slider 200.

[0034] In the embodiment, the bidirectional screw rod 300 is precisely arranged inside the side plate 110 and located below the guide groove 111; this up-down layout fully utilizes the vertical space of the side plate 110, so that the thickness of the whole driving structure is thinner and the structure is more compact.

[0035] In the embodiment, in order to realize the conversion of the rotary motion of the bidirectional screw rod 300 into the horizontal linear motion of the driving block 310 and finally into the transmission to the slider 200, a special design is made on the structure: a strip-shaped hole for communication is further arranged on the wall of the side plate 110 between the guide groove 111 and the bidirectional screw rod 300 located below the guide groove 111; the length direction of the strip-shaped hole is parallel to the axis direction of the guide groove 111 and the bidirectional screw rod 300, but the width in the vertical direction is accurately calculated to be only slightly larger than the corresponding size of the driving block 310, so as to provide accurate guidance for the driving block 310 and prevent the driving block 310 from deflecting or being stuck during the movement.

[0036] In the embodiment, the driving block 310 is contained in the strip-shaped hole, one end of the driving block 310 is combined with the bidirectional screw rod 300 through screw threads, and the other end of the driving block 310 extends upward through the strip-shaped hole and is configured to be capable of abutting against the bottom of the slider 200 sliding in the guide groove 111; when the bidirectional screw rod 300 rotates and drives the driving block 310 to move horizontally, the driving block 310 stably moves in a straight line under the constraint of the strip-shaped hole and drives the slider 200 through the part of the driving block 310 extending out of the strip-shaped hole, so as to effectively transmit power to the slider 200 and drive the slider 200 to accurately slide along the guide groove 111.

[0037] In the embodiment, by adopting the layout of “screw rod below, slider above, and driving block connected in the strip-shaped hole”, the embodiment realizes efficient, compact and reliable power transmission between the driving mechanism and the execution component, and lays a solid structural foundation for the stable operation of the whole tool changing device in a small space.

[0038] In a preferred embodiment, a first electromagnet is arranged on the driving block 310 and used for forming controllable connection with the slider 200; the top surface of the electromagnet is provided with a matching arc-shaped groove corresponding to the outer edge portion, so as to form positioning connection with the slider 200.

[0039] In this embodiment, the driving block 310 is the key link of power transmission, and a first electromagnet is arranged on the top of the driving block 310; the first electromagnet is integrated in the driving block 310, and the circuit of the first electromagnet is connected with the control system of the device through hidden lines, so that the first electromagnet can be controlled in real time and accurately according to the instructions of the tool changing process; the design enables the driving block 310 and the sliding block 200 to form a controllable connection relationship: when the sliding block 200 needs to be driven to move horizontally, the first electromagnet is powered on to generate strong adsorption force; when the sliding block 200 needs to perform actions such as lifting or reversing independently of horizontal driving, the first electromagnet is powered off, and the connection is automatically released.

[0040] In this embodiment, in order to ensure accurate circumferential positioning between the sliding block 200 and the driving block 310 while generating magnetic adsorption, prevent relative sliding or mispositioning, a matched arc-shaped groove is precisely machined on the top surface of the first electromagnet; the curvature of the arc-shaped groove matches the curvature of the lower surface of the outer edge of the sliding block 200; when the driving block 310 rises or is connected with the sliding block 200 under the action of the electromagnetic force, the outer edge of the sliding block 200 will be embedded in the arc-shaped groove.

[0041] In this embodiment, after the two driving blocks 310 are connected, the arc-shaped grooves form a circular groove, so that effective rotation limiting can be formed when the sliding block 200 rotates and changes position.

[0042] In a preferred embodiment, the reversing driving assembly includes a worm 400 rotatably installed on the side plate 110; the extension direction of the worm 400 is parallel to the extension direction of the side plate 110, and the worm 400 is used to drive the sliding block 200 to rotate; the sliding block 200 is provided with a matched worm gear corresponding to the worm 400, and a worm and gear structure is formed between the worm 400 and the worm gear.

[0043] In this embodiment, the reversing driving assembly mainly includes a worm 400; the worm 400 is rotatably installed in the inside of the side plate 110 through a bearing or other support structure; the installation position of the worm 400 corresponds to the middle point of the horizontal stroke of the sliding block 200; the extension direction of the worm 400 is parallel to the extension direction of the side plate 110, that is, the axis of the worm 400 is parallel to the axis of the bidirectional screw rod 300; such a layout makes the entire driving mechanism compact in the thickness direction of the side plate 110.

[0044] In this embodiment, in order to convert the rotating motion of the worm 400 into the rotation of the slider 200, corresponding worm gears are arranged on the slider 200 at positions corresponding to the worm 400; these worm gears are formed on the circumferential surface of the base portion of the slider 200; when the slider 200 is moved to the intermediate reversing position under the drive of the reciprocating drive assembly, the worm gear segment thereon is just engaged with the worm 400, thereby forming a worm and gear structure between the worm 400 and the slider 200.

[0045] In a preferred embodiment, the worm 400 comprises a coaxial worm shaft and worm thread; the cross section of the worm shaft comprises a first semicircular portion and a second semicircular portion; the worm thread is arranged on the first semicircular portion and can be connected to the slider 200 through the first semicircular portion and separated from the slider 200 through the second semicircular portion.

[0046] In this embodiment, the worm 400 is a composite structure comprising a coaxial worm shaft and worm thread; the key lies in that the cross section of the worm shaft comprises two specific portions: a first semicircular portion and a second semicircular portion; the two semicircular portions together form the substantially cylindrical profile of the worm shaft, but they are completely different in function.

[0047] In this embodiment, the worm thread is arranged and formed only on the first semicircular portion; this means that along the axial direction of the worm 400, one side of its outer surface is a worm thread segment with complete tooth profile, and the other side is a smooth cylindrical surface.

[0048] In this embodiment, In the initial state of the device, and when the slider 200 only needs to perform horizontal or lifting motion, the worm 400 is controlled and kept at a specific angular position, so that its second semicircular portion continuously faces outward and is directly opposite the movement path of the slider 200; in this state, there is a gap between the smooth second semicircular portion and the worm gear on the slider 200, and the two are completely separated and do not interfere with each other, thereby ensuring the free sliding of the slider 200 under the action of other drive assemblies.

[0049] In this embodiment, when the two sliders 200 carrying the tool move to the reversing position and are connected after 180° rotation, the control system drives the worm 400 to rotate; when the first semicircular portion of the worm 400 is rotated to a position opposite the worm gear on the slider 200, the two immediately enter the engaged state and form an effective worm and gear transmission pair; the continuous rotation of the worm 400 is converted into the precise rotation of the two sliders 200 through this engagement pair.

[0050] In this embodiment, when the worm 400 continues to rotate for several turns, the second semicircular part of the worm 400 also rotates to the position facing outward again after the driving slider 200 just completes the 180° reversing; at this time, the engagement of the worm thread and the worm gear tooth is automatically disengaged, the transmission connection is released, and the initial separation state is restored; this makes the two sliders 200 that have completed the reversing can be immediately driven by the reciprocating driving assembly, and slide away from each other without any hindrance.

[0051] In a preferred embodiment, the inside of the side plate 110 is provided with a mounting cavity for mounting the worm 400; both ends of the mounting cavity are provided with bearing seats for mounting the worm 400, and a communication hole is provided in the middle; the communication hole is located on the side of the mounting cavity close to the slider 200, and is used for the abutment of the worm thread and the slider 200.

[0052] In this embodiment, the inside of the side plate 110 is specially provided with a mounting cavity for mounting the worm 400; this mounting cavity is a cavity extending along the length direction of the side plate 110, which provides a dedicated mounting space for the worm 400, so that it is isolated from other components on the side plate 110 in space, avoids motion interference, and effectively protects the transmission components from external pollution.

[0053] In this embodiment, in order to ensure that the worm 400 can rotate smoothly and accurately, bearing seats for mounting the worm 400 are respectively arranged at both ends of the mounting cavity; the two ends of the worm 400 are supported in the two bearing seats through bearings; this two-end support structure gives the worm 400 high rotational stiffness and positional accuracy, ensures the centration when the worm 400 engages with the worm gear tooth on the slider 200, and thus the transmission is stable and low noise.

[0054] In this embodiment, in order to realize the function of local engagement between the worm 400 and the slider 200, a communication hole is provided in the middle section of the mounting cavity; the communication hole is located on the side of the mounting cavity close to the slider 200, and its length covers the activity range of the worm gear tooth on the slider 200 at the reversing position; this communication hole is a key design, which is like a window for the abutment of the worm thread and the slider 200; specifically, only when the first semicircular part of the worm 400 rotates to directly face the communication hole, the thread can extend out through the window and engage with the worm gear tooth of the slider 200; when the second semicircular part rotates to this position, a gap is formed to realize separation.

[0055] In this embodiment, the length of the worm thread is matched with the length of the communication hole, rather than being provided throughout; thus, the action of extending out through the window is realized.

[0056] In a preferred embodiment, the lifting driving assembly comprises a docking block 500 matched with the sliding block 200; the docking block 500 is arc-shaped near one side of the sliding block 200, and a second electromagnet is arranged corresponding to the sliding block 200, for forming a controllable connection with the sliding block 200; a slide cylinder 510 is arranged on the end plate 120 corresponding to the docking block 500, for driving the docking block 500 to lift relative to the end plate 120.

[0057] In this embodiment, the lifting driving assembly mainly comprises the docking block 500; the docking block 500 is designed to match the shape of the sliding block 200; specifically, the docking block 500 is arc-shaped near one side of the sliding block 200, aiming to form a large-area and stable contact and support with the arc-shaped surface of the base body part or the outer edge part of the sliding block 200.

[0058] In this embodiment, in order to realize controllable connection and separation with the sliding block 200, a second electromagnet is arranged on the docking block 500 corresponding to the position of the sliding block 200; the function of the second electromagnet is in harmony with that of the first electromagnet in the reciprocating driving assembly, and together they constitute a complete power switching system; when the sliding block 200 needs to be lifted, the second electromagnet is powered on to generate a strong magnetic force, for forming a controllable connection with the sliding block 200, and firmly adsorbing the docking block 500 and the sliding block 200 as a whole; when the lifting action is completed and the sliding block 200 needs to move horizontally or rotate, the second electromagnet is powered off and the magnetic force disappears, the connection is automatically released, and the sliding block 200 can restore its freedom.

[0059] In this embodiment, a slide cylinder 510 is arranged on the end plate 120 corresponding to the position of the docking block 500; the moving platform of the slide cylinder 510 is fixedly connected with the docking block 500, for driving the docking block 500 to lift relative to the end plate 120; the slide cylinder 510 itself has a high-rigidity and high-precision guide structure, which can ensure that the docking block 500 does not deviate during lifting, so as to realize accurate and stable vertical displacement of the sliding block 200 and the clamped tool.

[0060] In a preferred embodiment, the end of the side plate 110 is provided with a lifting sliding groove corresponding to the sliding block 200; the lifting sliding groove is arc-shaped, and the radius thereof matches that of the outer edge part; the docking block 500 is located in the lifting sliding groove, for docking with the base body part.

[0061] In this embodiment, The end of the side plate 110, corresponding to the motion stroke end position of the slider 200, is specially provided with a lifting chute; the lifting chute is not an ordinary straight chute, but is processed into an arc shape; the radius of the arc shape matches the radius of the outer edge of the slider 200; this design enables the arc-shaped outer edge to smoothly and non-interferingly enter and fit into the arc-shaped track of the lifting chute when the slider 200 moves to the end and needs to perform a lifting action.

[0062] In a preferred embodiment, the outer edge portion near one end of the end plate 120 is a plane; the plane is parallel to the end plate 120 for abutting positioning with the end plate 120.

[0063] In this embodiment, when the slider 200 moves in the horizontal direction to the limit position of its stroke, i.e., closest to the end plate 120, the plane will come into contact with and abut against the inner surface of the end plate 120. This face-to-face contact provides a clear and reliable mechanical hard stop for the slider 200 for abutting positioning with the end plate 120, accurately defining the end point of its horizontal movement.

[0064] Working process: In the initial state, the frame body is located near the tool magazine, which does not affect the action of the tool head; the two sliders 200 are located at the ends far away from each other and are attracted to the docking blocks 500 by the second electromagnet; When changing the tool, the docking block 500 near the tool magazine first drives the slider 200 to rise to take a new tool, and then to descend to reset; then, the frame body 100 slides to make the docking block 500 at the other end take out the old tool; after the two sliders 200 are reset, the first electromagnet and the second electromagnet are switched, so that the slider 200 first forms magnetic attraction with the driving block 310, and then drives the slider 200 to be close to the docking block by the bidirectional screw rod 300; at this time, the first electromagnet is controlled to be powered off first, and then the worm 400 is controlled to rotate to drive the cylindrical structure formed by the two sliders 200 to rotate until 180°, realizing the transposition of the two sliders 200; then, the new tool is installed on the tool head in turn, and the old tool is sent back to the tool magazine; this tool changing process is completed within the frame body 100, which is suitable for working environments with limited space.

[0065] The principles and implementation manners of the present application are described by using specific examples in the present article, and the above example descriptions are only used to help understand the method of the present application and its core idea. The above descriptions are only the preferred implementation manners of the present application. It should be noted that, due to the limited nature of the language expression, there are objectively infinite specific structures, and for ordinary skilled persons in the technical field, some improvements, refinements or changes can be made, or the above technical features can be combined in an appropriate manner without departing from the principles of the present application; these improvements, refinements, changes or combinations, or the direct application of the inventive concept and technical solution to other occasions without improvement, should be regarded as the protection scope of the present application.

Claims

1. A numerical control machine tool spindle tool changer, characterized in that, The utility model relates to a kind of numerical control machine tool spindle tool changing device, including Frame body (100), the frame body (100) is rectangular structure, slidingly installed between tool head and tool magazine, including two side plates (110) and end plate (120) being connected between the two side plates (110) and parallel to each other; Slider (200), the number of the slider (200) is two, including the base body part of semicircle and the outer edge part of arc; The base body part is equipped with mounting hole (210) for and tool butt joint; Two side plates (110) are equipped with guide slot (111) respectively corresponding the outer edge part, for and the slider (200) butt joint and limit sliding direction; Driving mechanism, the driving mechanism includes reciprocating drive assembly and reversing drive assembly being arranged on the side plate (110) and lifting drive assembly being arranged on the end plate (120); The reversing drive assembly is located at the middle of the side plate (110), for driving two slider (200) rotation reversing; The reciprocating drive assembly is located at the two sides of the reversing drive assembly respectively, for driving corresponding slider (200) sliding along horizontal direction; The lifting drive assembly is located above the reciprocating drive assembly, for driving the slider (200) sliding along vertical direction.

2. The numerical control machine tool spindle tool changing device according to claim 1, wherein The reciprocating drive assembly includes bidirectional screw rod (300) located inside two side plates (110) respectively and driving block (310) installed on the bidirectional screw rod (300); Two ends of the bidirectional screw rod (300) are respectively equipped with external threads with opposite rotation directions; The driving block (310) is respectively sleeved at two ends of the bidirectional screw rod (300), and is threadedly connected between the bidirectional screw rod (300).

3. The numerical control machine tool spindle tool changing device according to claim 2, wherein The bidirectional screw rod (300) is located below the guide slot (111); A strip-shaped hole for communication is further provided between the guide slot (111) and the bidirectional screw rod (300); The driving block (310) is located in the strip-shaped hole, for butt joint with the slider (200).

4. The numerical control machine tool spindle tool changing device according to claim 3, wherein A first electromagnet is provided on the driving block (310), for forming controllable connection with the slider (200); A matching arc-shaped groove is provided on the top surface of the electromagnet corresponding to the outer edge part, for forming positioning connection with the slider (200).

5. The numerical control machine tool spindle tool changing device according to claim 1, wherein The reversing drive assembly includes worm (400) rotatably installed on the side plate (110); The extension direction of the worm (400) is parallel to the extension direction of the side plate (110), for driving the slider (200) to rotate; A matching worm gear tooth is provided on the slider (200) corresponding to the worm (400), and a worm and gear structure is formed between the worm (400).

6. The numerical control machine tool spindle tool changing device according to claim 5, wherein The worm (400) comprises a coaxial worm shaft and worm thread; The cross section of the worm shaft comprises a first semicircular part and a second semicircular part; The worm thread is arranged on the first semicircular part, and can be connected with the slider (200) through the first semicircular part and separated from the slider (200) through the second semicircular part.

7. The numerical control machine tool spindle tool changer according to claim 6, characterized in that, An installation cavity for installing the worm (400) is arranged inside the side plate (110); Both ends of the installation cavity are provided with bearing seats for installing the worm (400), and a communication hole is arranged in the middle; The communication hole is located on the side of the installation cavity close to the slider (200), and is used for connecting the worm thread with the slider (200).

8. The numerical control machine tool spindle tool changer according to claim 1, characterized in that, The lifting driving assembly comprises a butt joint block (500) matched with the slider (200); The side of the butt joint block (500) close to the slider (200) is arc-shaped, and a second electromagnet is arranged on the side corresponding to the slider (200), which is used for forming a controllable connection with the slider (200); A slide table air cylinder (510) is arranged on the end plate (120) corresponding to the butt joint block (500), which is used for driving the butt joint block (500) to lift.

9. The numerical control machine tool spindle tool changer according to claim 8, characterized in that, The end of the side plate (110) corresponding to the slider (200) is provided with a lifting sliding groove; The lifting sliding groove is arc-shaped, and the radius thereof matches the radius of the outer edge part; The butt joint block (500) is located in the lifting sliding groove, and is used for butt joint with the base part.

10. The numerical control machine tool spindle tool changer according to claim 1, characterized in that, The end of the outer edge part close to the end plate (120) is a flat surface; The flat surface is parallel to the end plate (120), and is used for abutting and positioning with the end plate (120).

Images