Tray structure of double-row tool numerical control machine tool

Abstract

The invention discloses a double-row cutter numerical control machine tool tray structure, and particularly relates to the technical field of numerical control machine tools, the double-row cutter numerical control machine tool tray structure comprises a main shaft system and a cutter assembly, the main shaft system comprises a main shaft box and a main shaft, the main shaft is rotatably arranged in the main shaft box, at least two cutter trays are arranged around the main shaft box, and the two cutter trays are arranged on the two sides of the main shaft box; the tool tray is located at the front end of the workpiece clamping area of the spindle and connected with the spindle system through the feeding driving assembly, the tool assembly comprises cutting tools, and multiple sets of cutting tools are arranged on the surface of the tool tray. Numerical control machining can be conducted by means of the two sets of cutting tools at the same time, the machining efficiency is effectively improved, when the cutting tools need to be replaced actually, only the tool trays need to be driven to move correspondingly so that the corresponding cutting tools can make contact with a workpiece, the time consumed for replacing the tools is effectively shortened, and the machining efficiency is further improved.

Description

Technical Field

[0001] The present invention relates to the technical field of numerical control machine tools, and more particularly to a pallet structure for a double-row tool numerical control machine tool. Background Art

[0002] Numerical Control Machine (NC machine tool) is an advanced manufacturing equipment that uses digital control technology to operate and monitor machine tool movement. CNC machine tools are mainly composed of a spindle system, a feed system, and a tool system. In traditional CNC machine tools, the tool system is relatively simple. For example, in a traditional CNC lathe, the lathe spindle is mainly used to clamp the workpiece, while in the tool system, the tool is installed on the tool holder, and the feed system drives the tool holder to move, thereby causing the tool to contact the workpiece for turning processing.

[0003] However, in traditional CNC lathes, the tool system is relatively simple, that is, during actual turning processing, only a single tool contacts and processes the workpiece, and the actual processing efficiency is limited. In particular, for Du Yu multi-tool system processing, after a single tool is processed, the tool holder system needs to be returned to its initial position, and the tool must be replaced before secondary feed processing can be performed. The actual processing efficiency is relatively low. Summary of the Invention

[0004] The present invention provides a double-row tool CNC machine tool pallet structure to solve the problem that: in existing CNC lathes, the tool system is relatively simple, that is, during actual turning processing, only a single tool contacts and processes the workpiece, and the actual processing efficiency is limited. As for the existing multi-tool system processing, after the single tool processing is completed, the tool holder system needs to be returned to the initial position, and the tool must be replaced before secondary feed processing can be carried out, and the actual processing efficiency is relatively low.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: a double-row tool CNC machine tool pallet structure, comprising a spindle system and a tool assembly, the spindle system comprising a spindle box and a spindle, the spindle being rotatably arranged in the spindle box, at least two sets of tool pallets being arranged around the spindle box, the two sets of tool pallets being arranged on both sides of the spindle box, the tool pallets being located at the front end of the spindle workpiece clamping area, the tool pallets being connected to the spindle system via a feed drive assembly, the feed drive assembly being used to drive the tool pallets to move along the X, Y, and Z axes respectively;

[0006] The tool assembly includes cutting tools, and a plurality of groups of cutting tools are arranged on the surface of the tool tray;

[0007] A pulling and positioning assembly is also provided on the side of the tool tray facing away from the spindle system.

[0008] In a preferred embodiment, a reaction frame is also provided on the tool pallet, the reaction frame is located on the side of the workpiece away from the cutting tool, and the reaction frame and the tool pallet are slidably fitted together, a reaction force driver is fixedly installed on the tool pallet, the reaction frame is installed on the output end of the reaction force driver, and a workpiece adapter component is provided on the reaction frame, which is used to contact the workpiece.

[0009] In a preferred embodiment, the workpiece adapter assembly is a ball-type workpiece adapter assembly, which includes two groups of balls, which are symmetrically arranged up and down. The workpiece adapter assembly also includes a ball groove, which is arranged on the reaction frame, and the balls are rollingly installed in the ball groove.

[0010] In a preferred embodiment, the workpiece adapter assembly is a crawler-type workpiece adapter assembly, which includes a group of belts and multiple groups of floating brackets. The floating brackets are slidably inserted in the reaction frame, and the sliding direction of the floating brackets is set perpendicular to the axial direction of the workpiece. An elastic member is provided between the floating bracket and the reaction frame. The elastic member is used to provide an elastic force for the floating bracket to squeeze the workpiece, and a pulley is rotatably installed in the floating bracket, and the belt is sleeved on the outside of the pulley to form a crawler structure.

[0011] In a preferred embodiment, the outer surface of the belt is provided with a accommodating groove, and an injection tube is provided in the accommodating groove. Both ends of the injection tube extend out of the accommodating groove and are connected to the reaction frame through an elastic mounting frame. One end of the injection tube is connected to an injection pump, which is used to provide high-pressure cutting fluid into the injection tube. The other end of the injection tube is a sealed end, and a release hole is provided in the middle of the injection tube.

[0012] In a preferred embodiment, the pulling and positioning assembly includes a traction guide seat, a traction frame, and a first pulling positioner arranged on the traction frame. The traction guide seat is fixedly connected to the spindle box and is distributed along the axial direction of the workpiece. At the same time, the traction frame is slidably installed on the traction guide seat. The traction guide seat is provided with a linear drive for driving the traction frame to move along the X-axis direction. The first pulling positioner includes a support tube and a threaded rod. The support tube is fixedly installed on the traction frame, and the threaded rod is threadedly inserted in the support tube. A docking bolt is rotatably installed on one end of the threaded rod corresponding to the spindle box, and the docking bolt is arranged corresponding to the threaded hole pre-opened at the end of the workpiece.

[0013] In a preferred embodiment, a plurality of groups of laterally distributed mounting grooves are provided on the tool tray, and the cutting tool is installed in the mounting groove of the tool tray through a tool holder. The tool assembly also includes a drilling tool, wherein a group of tool trays is provided with a plurality of groups of drilling tools on one side corresponding to the spindle box, and the drilling tool is fixedly connected to the tool tray through a tool holder, and the tool holder is fixedly installed on the tool tray, and a plurality of groups of mounting holes for installing the drilling tool are provided on the tool holder.

[0014] In a preferred embodiment, the pulling and positioning assembly further includes another set of pulling guide seats, a pulling frame, and a second pulling positioner disposed on the pulling frame. A linear drive is provided between the pulling frame and the pulling guide seat. The second pulling positioner includes two sets of clamping plates. The two sets of clamping plates are slidably mounted on the pulling frame. On the side of the clamping plate corresponding to the workpiece, two sets of positioning wheels are provided. The two sets of positioning wheels are symmetrically distributed up and down, and the positioning wheels are mounted on the clamping plate through a positioning wheel frame. The positioning wheels are rotatably mounted in the positioning wheel frame. An oblique guiding mechanism is fixedly mounted on the clamping plate. The oblique guiding mechanism is arranged to gradually move away from the workpiece in the direction away from the spindle box. The positioning wheel frame is slidably mounted on the oblique guiding mechanism.

[0015] In a preferred embodiment, the feed drive assembly includes a Z-axis moving seat, an X-axis moving seat, and a Y-axis moving seat. The Z-axis moving seat is slidably mounted on the side wall of the spindle box along the Z-axis direction. The X-axis moving seat is slidably mounted on the Z-axis moving seat along the X-axis direction. The Y-axis moving seat is slidably mounted on the front end of the X-axis moving seat along the Y-axis direction. The tool tray is fixedly mounted on the Y-axis moving seat. Between the Z-axis moving seat and the spindle box, between the X-axis moving seat and the Z-axis moving seat, and between the Y-axis moving seat and the X-axis moving seat, they are all in sliding fit through linear guide rails. Between the Z-axis moving seat and the spindle box, between the X-axis moving seat and the Z-axis moving seat, and between the Y-axis moving seat and the X-axis moving seat, linear drives are all provided.

[0016] In a preferred embodiment, the tool rest is rotatably mounted in the mounting groove of the tool tray, and a torsion elastic member is provided between the tool rest and the mounting groove of the tool tray. The torsion elastic member is used to provide an elastic force for the tool rest to flip away from the tool tray. A tail block is fixedly connected to the end of the tool rest away from the cutting tool. A pusher is further provided on the tool tray. The pusher corresponds to the tail block. A pusher fixing head is provided at the output end of the pusher. The pusher pushes the tail block by driving the pusher fixing head to extend, so that the tool rest is fixedly attached to the tool tray.

[0017] The beneficial effects of the present invention are as follows:

[0018] 1. By driving the two sets of tool trays to move correspondingly, the left and right two sets of corresponding cutting tools can simultaneously contact the workpiece, so that numerical control machining can be carried out by means of the two sets of cutting tools at the same time, effectively improving the machining efficiency. And when the cutting tool actually needs to be replaced, only need to drive the tool tray to move correspondingly to make the corresponding cutting tool contact the workpiece, effectively reducing the consumption time of replacing the tool and further improving the machining efficiency.

[0019] 2. By providing a pulling and positioning assembly to form a pulling force on the end of the workpiece, the stability of the workpiece is enhanced in the form of stretching the workpiece, reducing the bending deformation of the workpiece during the machining process, and further improving the machining stability. Brief Description of the Drawings

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0021] Figure 2 This is a state diagram when the side views of two groups of tool trays of the present invention are operating simultaneously.

[0022] Figure 3 This is a top view when two groups of cutting tools of the present invention are operating simultaneously.

[0023] Figure 4 This is a state diagram when the first pulling and positioning device of the present invention positions and pulls the end of a slender workpiece.

[0024] Figure 5 This is a schematic diagram of the structure after a drilling tool is installed on one of the trays of the present invention.

[0025] Figure 6 This is a state diagram when the cutting tool and the drilling tool of the present invention are operating simultaneously.

[0026] Figure 7 This is a state diagram when the second pulling and positioning device of the present invention positions the outside of the workpiece end.

[0027] Figure 8 This is a schematic diagram of the cooperation between the positioning wheel frame and the clamping plate of the present invention.

[0028] Figure 9 This is a schematic diagram of the structure after a reaction force frame is added to the tool tray of the present invention.

[0029] Figure 10 This is a schematic diagram of the structure of the ball-type workpiece adapter assembly of the present invention.

[0030] Figure 11 This is a schematic diagram of the structure of the caterpillar-type workpiece adapter assembly of the present invention.

[0031] Figure 12 For the present invention Figure 11 Enlarged view of the structure of part A.

[0032] Figure 13 Schematic diagram of the distribution state of the liquid injection pipe of the present invention in the accommodation groove.

[0033] Figure 14 This is a schematic diagram after the installation method of the cutting tool of the present invention is improved.

[0034] Figure 15 This is a state diagram when the cutting tool automatically pops out under the action of the torsion elastic member after the top push fixation is cancelled in the present invention.

[0035] The reference numerals are as follows: 1, spindle system; 11, spindle headstock; 12, spindle; 2, tool tray; 3, tool assembly; 31, cutting tool; 32, tool rest; 321, tailstock; 33, drilling tool; 34, tool holder; 35, pusher; 36, pusher fixing head; 4, feed drive assembly; 41, Z-axis moving seat; 42, X-axis moving seat; 43, Y-axis moving seat; 5, pulling and positioning assembly; 51, pulling guide seat; 52, towing frame; 53, first pulling and positioning device; 531, support cylinder; 532, threaded rod; 533, docking bolt; 54, second pulling and positioning device; 541, clamping plate; 542, positioning wheel; 543, positioning wheel frame; 544, oblique guiding mechanism; 6, workpiece; 7, reaction frame; 71, reaction driver; 8, workpiece adaptation assembly; 81, ball-type workpiece adaptation assembly; 811, ball groove; 812, ball; 82, caterpillar-type workpiece adaptation assembly; 821, belt; 822, floating bracket; 823, pulley; 824, accommodating groove; 9, liquid injection pipe; 91, elastic mounting bracket; 92, release hole. Detailed implementation manners

[0036] The present application will be further described in detail below with reference to the accompanying drawings. It is necessary to point out here that the following detailed implementation manners are only used to further illustrate the present application and cannot be construed as a limitation on the protection scope of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application according to the above application content.

[0037] Referring to the attached drawings of the specification Figures 1 to 4 , a tool tray structure of a double-row tool numerical control machine tool, comprising a spindle system 1 and a tool assembly 3. The spindle system 1 includes a spindle headstock 11 and a spindle 12. The spindle 12 is rotatably arranged in the spindle headstock 11. Among them, the spindle system 1 is the basic structure of a numerically controlled lathe, and will not be elaborated in this embodiment. At least two groups of tool trays 2 are arranged around the spindle headstock 11. The two groups of tool trays 2 are preferably arranged on both sides of the spindle headstock 11. The tool tray 2 is located at the front end of the area where the spindle 12 clamps the workpiece 6. The tool tray 2 is connected to the spindle system 1 through a feed drive assembly 4. The feed drive assembly 4 is used to drive the tool tray 2 to move in the X, Y, and Z axis directions respectively.

[0038] The tool assembly 3 includes a cutting tool 31. Multiple groups of cutting tools 31 are arranged on the surface of the tool tray 2. Each cutting tool 31 selects a corresponding tool structure according to actual processing requirements.

[0039] During actual use, referring to the attached drawings of the specification Figure 2, by driving two sets of tool trays 2 to move correspondingly, the left and right sets of corresponding cutting tools 31 can contact the workpiece 6 simultaneously. For example, the left cutting tool 31 continues to perform cutting on a larger outer diameter, while the right cutting tool 31 performs further cutting on a smaller outer diameter on the side of the left cutting tool 31 away from the headstock 11. Thus, numerical control machining can be carried out with two sets of cutting tools 31 simultaneously, effectively improving the machining efficiency. And when it is actually necessary to replace the cutting tool 31, only need to drive the tool tray 2 to move correspondingly to make the corresponding cutting tool 31 contact the workpiece 6, effectively reducing the consumption time of tool replacement and further improving the machining efficiency.

[0040] Furthermore, multiple sets of horizontally distributed mounting grooves are provided on the tool tray 2, and the cutting tool 31 is installed in the mounting groove of the tool tray 2 through a tool holder 32. And according to the actual machining requirements, different cutting tools 31 can be installed in each mounting groove.

[0041] The feed drive assembly 4 includes a Z-axis moving seat 41, an X-axis moving seat 42, and a Y-axis moving seat 43. The Z-axis moving seat 41 is slidably mounted on the side wall of the headstock 11 along the Z-axis direction, the X-axis moving seat 42 is slidably mounted on the Z-axis moving seat 41 along the X-axis direction, the Y-axis moving seat 43 is slidably mounted on the front end of the X-axis moving seat 42 along the Y-axis direction, and the tool tray 2 is fixedly mounted on the Y-axis moving seat 43.

[0042] Among them, the Z-axis moving seat 41 and the headstock 11, the X-axis moving seat 42 and the Z-axis moving seat 41, and the Y-axis moving seat 43 and the X-axis moving seat 42 are all slidably mated through linear guides. Linear drivers are provided between the Z-axis moving seat 41 and the headstock 11, between the X-axis moving seat 42 and the Z-axis moving seat 41, and between the Y-axis moving seat 43 and the X-axis moving seat 42. The linear driver is preferably a motor screw structure, thereby improving the machining accuracy of the CNC machine tool.

[0043] It should be noted that the above tool tray 2 is docked with the headstock 11 through the feed drive assembly 4, which is suitable for the improvement of existing traditional CNC machine tools. Only need to install the corresponding feed drive assembly 4 outside the headstock 11, which can further reduce the production cost of the CNC machine tool. In addition, the above distribution method of the feed drive assembly 4 is only one of them. In actual design or improvement, other ways of the feed drive assembly 4 can also be set, such as directly installing the X-axis moving seat 42 on the machine tool frame, and then setting the Z-axis moving seat 41 and the Y-axis moving seat 43 on the X-axis moving seat 42, etc.

[0044] In the above embodiments, since the present invention provides two tool trays 2, two sets of tools can be processed synchronously. However, due to the requirements of the processing technology, the two sets of tools do not stay at the same processing position for a long time, that is, there is a certain distance between the two sets of tools. For short and thick workpieces 6, the above distance is not too large, and the workpiece 6 itself has good rigidity. During actual processing, the overall stability is relatively high, and the processing accuracy is also relatively high. However, for slender rod-shaped workpieces 6, during actual processing, the two sets of tools are relatively far apart. For example, referring to the attached drawings of the specification Figure 3 and Figure 4 As shown, at this time, since the two cutting tools 31 will form a certain thrust on the workpiece 6 during actual cutting, and when the two cutting tools 31 are relatively far apart, since the thrust directions formed by the two cutting tools 31 on the workpiece 6 are opposite, it is easy to cause slight bending deformation of the workpiece 6 itself, and then form vibration during the rotation of the workpiece 6, affecting the processing accuracy. Seriously, it may even cause processing construction. The traditional tailstock of a numerical control machine mainly forms a stable support for the workpiece 6 through centering extrusion. However, for slender workpieces 6, it is more likely to deform when subjected to axial extrusion. Therefore, to cooperate with the stable operation of the two tool trays 2, the present embodiment also provides the following technical solutions. Specifically, a pulling and positioning assembly 5 is further provided on the side of the tool tray 2 facing away from the spindle system 1. The pulling and positioning assembly 5 includes a pulling guide seat 51, a pulling frame 52, and a first pulling and positioning device 53 provided on the pulling frame 52. Among them, the pulling guide seat 51 is fixedly connected to the spindle box 11 and is distributed along the axial direction of the spindle 12. At the same time, the pulling frame 52 is slidably installed on the pulling guide seat 51, and a linear drive for driving the pulling frame 52 to move in the X-axis direction is provided on the pulling guide seat 51.

[0045] The first pulling and positioning device 53 includes a support cylinder 531 and a threaded rod 532. The support cylinder 531 is fixedly installed on the pulling frame 52, and the threaded rod 532 is threadedly inserted into the support cylinder 531. A docking bolt 533 is rotatably installed at one end of the threaded rod 532 corresponding to the spindle box 11.

[0046] It should be noted that in the above solution, a threaded hole adapted to the docking bolt 533 needs to be pre-opened at the end of the workpiece 6, and a blank section is reserved. This blank section is not processed, and this blank section covers the above threaded hole. During actual processing, first connect the docking bolt 533 with the threaded hole at the end of the workpiece 6, and rotate the threaded rod 532 to make the docking bolt 533 form a pulling force on the workpiece 6, so as to enhance the stability of the workpiece 6 in the form of stretching the workpiece 6 and reduce the bending deformation of the workpiece 6 during processing. Further, to improve the stability of processing, the cooperation between the docking bolt 533 and the threaded hole is only one way to form a connection at the end of the workpiece 6, and other related clamping structures can also replace the docking bolt 533.

[0047] Furthermore, in the above-described embodiment, in addition to using two rows of cutting tools 31 for simultaneous cutting, in the case of machining processes such as drilling and boring that are required, the present embodiment further provides the following technical solution. Referring to the accompanying Figure 5 and Figure 6 drawings, the tool assembly 3 further includes a drilling tool 33. On one side of the tool turret 2 corresponding to the main spindle box 11, multiple groups of drilling tools 33 are provided. The drilling tool 33 is fixedly connected to the tool turret 2 through a tool holder 34. The tool holder 34 is fixedly installed on the tool turret 2. Multiple mounting holes for installing the drilling tool 33 are provided on the tool holder 34, and corresponding fixing structures are provided.

[0048] By adopting the above solution, the machining functions of the numerical control machine tool can be further enriched, multiple processes can be carried out simultaneously, and the machining efficiency and practicality of the numerical control machine tool can be further improved.

[0049] However, in the machining process with a drilling requirement, the end of the workpiece 6 needs to cooperate with the drilling tool 33 for drilling. At this time, if the pulling method of fixedly connecting the end of the workpiece 6 with a docking bolt 533, etc. is still used, the operation of the drilling tool 33 will be affected. Therefore, the present embodiment further provides the following technical solution. Specifically, referring to the accompanying Figure 7 and Figure 8 drawings, the pulling and positioning assembly 5 further includes another set of pulling guide seats 51, a traction frame 52, and a second pulling and positioning device 54 provided on the traction frame 52. A linear actuator is provided between the traction frame 52 and the pulling guide seat 51. The second pulling and positioning device 54 includes two sets of clamping plates 541. The two sets of clamping plates 541 are slidably installed on the traction frame 52, and a linear actuator is provided between the clamping plate 541 and the traction frame 52, so as to automatically drive the two sets of clamping plates 541 to approach the workpiece 6. Among them, on the side of the clamping plate 541 corresponding to the workpiece 6, two sets of positioning wheels 542 are provided. The two sets of positioning wheels 542 are symmetrically distributed up and down, and the positioning wheels 542 are installed on the clamping plate 541 through a positioning wheel frame 543. The positioning wheels 542 are rotatably installed in the positioning wheel frame 543. Referring to the accompanying Figure 8 drawings, an inclined guiding mechanism 544 is fixedly installed on the clamping plate 541. The inclined guiding mechanism 544 is arranged to gradually move away from the workpiece 6 in the direction away from the main spindle box 11. The positioning wheel frame 543 is slidably installed on the inclined guiding mechanism 544.

[0050] It should be noted that before the drilling tool 33 is actually processed, the second pulling positioner 54 can be controlled to move to the corresponding position, and then the two sets of clamping plates 541 can be controlled to move closer to each other, so that the positioning wheel 542 on the clamping plate 541 cooperates with the outer circumference of the workpiece 6, so that the end of the workpiece 6 away from the spindle system 1 can be positioned. At the same time, with the help of the oblique guide mechanism 544, when the clamping plate 541 applies lateral pressure to the workpiece 6, an axial thrust is formed on the positioning wheel 542, and then the thrust is applied to the end of the workpiece 6, forming a certain pressure on the workpiece 6. The pulling effect is achieved, thereby avoiding the deformation of the workpiece 6 caused by the axial pressure exerted on the workpiece 6 by the drilling tool 33 when drilling, and also avoiding the unstable vibration of the cutting tool 31 on the other set of tool trays 2 during synchronous operation. The thrust transmission between the positioning wheel 542 and the workpiece 6 can be carried out by means of the friction force of the positioning wheel 542, that is, the positioning wheel 542 is set to a high resistance, or a group of reserved convex steps can be set at the end of the workpiece 6, and the positioning wheel 542 is set on the step surface of the convex step to directly transmit the axial thrust.

[0051] In the above embodiment, in addition to setting up the pulling and positioning component 5 to pull the workpiece 6 to improve stability, this embodiment also provides another way to enhance processing stability. The reason why the above-mentioned slender workpiece 6 vibrates is that when the two sets of cutting tools 31 work synchronously, the workpiece 6 is only subjected to the unidirectional thrust of the cutting tool 31 at the position corresponding to the cutting tool 31, thereby forming deformation and vibration hazards. Therefore, this embodiment improves the processing stability by compensating for the imbalance of the above-mentioned thrust. For details, please refer to the attached manual. Figure 9 A reaction frame 7 is also provided on the tool tray 2. The reaction frame 7 is located on the side of the workpiece 6 away from the cutting tool 31, and the reaction frame 7 and the tool tray 2 are slidably fitted. A reaction force driver 71 is fixedly installed on the tool tray 2. The reaction force driver 71 is also a linear driver. The reaction frame 7 is installed on the output end of the reaction force driver 71. A workpiece adapter component 8 is provided on the reaction frame 7. The workpiece adapter component 8 is used to contact the workpiece 6.

[0052] It should be noted that the reaction frame 7 can be set as a detachable structure. For example, two sets of reaction drivers 71 are provided, one end of the reaction frame 7 is directly rotatably installed at the output end of one of the reaction drivers 71, and a slot structure that engages with the output end of the other set of reaction drivers 71 is provided at the other end of the reaction frame 7. Before actually installing the workpiece 6, the reaction frame 7 is rotated out to avoid hindering the installation of the workpiece 6. After the installation is completed, the reaction frame 7 is then flipped and engaged and fixed with the output end of the other set of reaction drivers 71. In addition, the reaction frame 7 can also be directly fixedly connected to the output ends of the two sets of reaction drivers 71. When the workpiece 6 needs to be installed, the reaction frame 7 is driven by the reaction driver 71 to move away from the tool tray 2, and then the workpiece 6 can be passed through the space formed between the two and installed on the spindle 12. During actual operation, when there are two sets of cutting tools 31 with a relatively large distance between them in the machining program, the reaction frame 7 can be driven by the reaction driver 71 to approach the workpiece 6, so that the workpiece adapter assembly 8 contacts the workpiece 6, forming a reverse thrust on the workpiece 6, and thus relatively balancing the unidirectional thrust generated by the cutting tool 31 during the machining of the workpiece 6, thereby reducing the magnitude of the unbalanced force and improving the stability of the workpiece 6.

[0053] Among them, the reaction frame 7 and the workpiece adapter assembly 8 only provide an appropriate reaction force to the workpiece 6 to reduce the impact of the unidirectional thrust of the cutting tool 31. Therefore, there is no need for high-precision requirements for the reaction frame 7 and the workpiece adapter assembly 8. At the same time, since multiple sets of cutting tools 31 are provided on a single tool tray 2, multiple sets of workpiece adapter assemblies 8 can also be provided on the reaction frame 7, which are respectively set corresponding to the cutting tools 31. At the same time, only one set of workpiece adapter assembly 8 can also be provided, and a corresponding moving drive structure, such as a linear driver, is provided, and the position of the workpiece adapter assembly 8 is adjusted to adapt to the corresponding cutting tool 31.

[0054] In the above embodiment, the workpiece adapter assembly 8 can adopt a simple ball-type workpiece adapter assembly 81. For example, referring to the attached Figure 10 illustrations, the ball-type workpiece adapter assembly 81 includes two sets of balls 812, and the two sets of balls 812 are symmetrically arranged up and down. The workpiece adapter assembly 8 further includes a ball groove 811, and the ball groove 811 is provided on the reaction frame 7, and the balls 812 are rotatably installed in the ball groove 811.

[0055] Furthermore, in the above embodiment, the balls 812 are of a rigid structure. For workpieces 6 with relatively low machining hardness, such as materials like aluminum and copper, especially when the workpiece 6 has been pre-drilled by the tool assembly 3 and a hollow structure has been formed in a local area, the reverse extrusion of the ball groove 811 is likely to cause extrusion damage to the workpiece 6. For this reason, this embodiment also provides another workpiece adapter assembly 8. Specifically, referring to the attached Figures 11 to 13, the workpiece adaptation component 8 is a crawler-type workpiece adaptation component 82. The crawler-type workpiece adaptation component 82 includes a set of belts 821 and multiple sets of floating brackets 822. The floating brackets 822 are slidably inserted into the reaction frame 7, and the sliding direction of the floating brackets 822 is perpendicular to the axial direction of the workpiece 6. An elastic member is provided between the floating brackets 822 and the reaction frame 7. This elastic member is used to provide an elastic force that squeezes the floating brackets 822 towards the workpiece 6. And a pulley 823 is rotatably installed in the floating brackets 822. The belt 821 is sleeved outside the pulley 823 to form a crawler structure. During actual use, the reaction frame 7 is driven to approach the workpiece 6. As a result, a concave area is formed on the workpiece 6 on the belt 821, so that the belt 821 forms contact and limitation on the workpiece 6, and by means of the belt 821 and the floating brackets 822, a force opposite to the thrust formed by the cutting tool 31 is provided to the reaction frame 7. Furthermore, the influence of the above-mentioned unidirectional thrust on the workpiece 6 is reduced to avoid deformation and vibration of the workpiece 6 due to excessive unidirectional thrust. Among them, the belt 821 only needs to provide an appropriate range of reverse force to the workpiece 6 to appropriately offset the unidirectional thrust of the cutting tool 31, allowing a thrust difference to be formed between the two, but this thrust difference can avoid deformation of the workpiece 6, so that there is no need for the pulley 823 to provide relatively precise and stable thrust.

[0056] In addition, the number of floating brackets 822 and the length of the belt 821 can be increased, so that the crawler-type workpiece adaptation component 82 can cover all areas of the cutting tools 31. Then, during actual use, without adjusting the position of the workpiece adaptation component 8, at the corresponding positions of the cutting tools 31, the workpiece 6 can be reversely supported and positioned through the concave deformation of the belt 821 by the workpiece 6.

[0057] Furthermore, in the above-mentioned embodiment, a receiving groove 824 is provided on the outer surface of the belt 821. A liquid injection pipe 9 is provided in the receiving groove 824. Both ends of the liquid injection pipe 9 extend out of the receiving groove 824 and are connected to the reaction frame 7 through an elastic mounting frame 91. One end of the liquid injection pipe 9 is connected to a liquid injection pump, and this liquid injection pump is used to provide high-pressure cutting fluid into the liquid injection pipe 9. The other end of the liquid injection pipe 9 is a sealed end. A release hole 92 is provided in the middle of the liquid injection pipe 9. During actual use, the release hole 92 outputs cutting fluid in the area between the belt 821 and the workpiece 6, so as to form a liquid film between the two. On the one hand, it can effectively cool the workpiece 6, and on the other hand, it can lubricate between the belt 821 and the workpiece 6, so as to facilitate the axial movement of the workpiece adaptation component 8 along with the tool tray 2 on the workpiece 6.

[0058] It should be noted that the linear drivers used in multiple places in the above solutions can be selected as cylinders, hydraulic cylinders, linear motors, motor screw structures, etc. according to requirements. The specific selection depends on the actual situation, and this embodiment will not be elaborated too much.

[0059] In the above-described embodiments, due to the limited internal space of the CNC machine tool, the cutting tools on the tool rest provided on the pallet are relatively dense. Therefore, in actual use, for a workpiece 6 with a relatively small machining volume, the upper and lower sets of cutting tools of a single cutting tool will not touch the workpiece 6 to form a bottom contact. However, for a workpiece 6 with a relatively large volume, the distance between the upper and lower sets of cutting tools on a single pallet is limited. During actual machining, it is easy for the upper and lower sets of cutting tools to accidentally touch the workpiece 6, resulting in machining errors and affecting the machining quality. For this reason, the present embodiment further improves the installation method of the above-mentioned cutting tool 31. Specifically, referring to the attached drawings of the specification Figure 14 and Figure 15 , the tool rest 32 is rotatably installed in the installation groove of the tool pallet 2, and a torsion elastic member, such as a torsion spring, is provided between the tool rest 32 and the installation groove of the tool pallet 2. This torsion elastic member is used to provide an elastic force for the tool rest 32 to flip away from the tool pallet 2. A tail block 321 is fixedly connected to one end of the tool rest 32 away from the cutting tool 31. A push-pull positioning assembly 5 of a pusher 35 is also provided on the tool pallet 2. The push-pull positioning assembly 5 of the pusher 35 is arranged corresponding to the tail block 321. A push-fixed head 36 of the push-pull positioning assembly 5 of the pusher 35 is provided with a guiding seat 51. The push-pull positioning assembly 5 of the pusher 35 is preferably a cylinder structure. The push-pull positioning assembly 5 of the pusher 35 pushes the tail block 321 by driving the push-fixed head 36 to extend the guiding seat 51, so that the tool rest 32 is fixedly attached to the tool pallet 2 for machining. For the unused cutting tool 31, the push of the push-pull positioning assembly 5 of the pusher 35 on its tail block 321 can be cancelled, so that the cutting tool 31 automatically pops out under the action of the torsion elastic member, thus moving away from the workpiece 6 and not interfering with the workpiece 6. Furthermore, under the condition of making full use of the original space of the CNC machine tool, the CNC machine tool can be adapted to the machining of larger workpieces 6, further improving the practicality of the CNC machine tool.

[0060] It should be noted that the above-mentioned method of fixing the tool rest 32 by means of the push-pull positioning assembly 5 of the pusher 35 and the tool rest 32 automatically flipping out by means of the torsion elastic member is one of the driving-away schemes for the unused cutting tool 31 provided in the present embodiment. Other schemes that can automatically drive the tool rest 32 to flip can also meet the above requirements.

[0061] The above-described embodiments only represent several implementation manners of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention.

Claims

1. A double-row tool CNC machine tool pallet structure, characterized in that: It includes a spindle system (1) and a tool assembly (3). The spindle system (1) includes a spindle box (11) and a spindle (12). The spindle (12) is rotatably arranged in the spindle box (11). At least two groups of tool trays (2) are arranged around the spindle box (11). The two groups of tool trays (2) are arranged on both sides of the spindle box (11). The tool tray (2) is located at the front end of the area where the spindle (12) holds the workpiece. The tool tray (2) is connected to the spindle system (1) through a feed drive assembly (4). The feed drive assembly (4) is used to drive the tool tray (2) to move along the X, Y, and Z axes respectively. The tool assembly (3) includes a cutting tool (31). Multiple groups of cutting tools (31) are arranged on the surface of the tool tray (2). A pulling and positioning assembly (5) is further arranged on the side of the tool tray (2) facing away from the spindle system (1).

2. The pallet structure of a double-row tool CNC machine tool according to claim 1, characterized in that: A reaction force frame (7) is also arranged on the tool tray (2). The reaction force frame (7) is located on the side of the workpiece (6) facing away from the cutting tool (31). The reaction force frame (7) is slidably matched with the tool tray (2). A reaction force driver (71) is fixedly installed on the tool tray (2). The reaction force frame (7) is installed on the output end of the reaction force driver (71). A workpiece adaptation assembly (8) is arranged on the reaction force frame (7). The workpiece adaptation assembly (8) is used to contact the workpiece (6).

3. The pallet structure of a double-row tool CNC machine tool according to claim 2, characterized in that: The workpiece adaptation assembly (8) is a ball-type workpiece adaptation assembly (81). The ball-type workpiece adaptation assembly (81) includes two groups of balls (812). The two groups of balls (812) are symmetrically arranged up and down. The workpiece adaptation assembly (8) further includes a ball groove (811). The ball groove (811) is arranged on the reaction force frame (7). The balls (812) are rotatably installed in the ball groove (811).

4. A double-row tool CNC machine tool pallet structure according to claim 2, characterized in that: The workpiece adaptation assembly (8) is a track-type workpiece adaptation assembly (82). The track-type workpiece adaptation assembly (82) includes a group of belts (821) and multiple groups of floating brackets (822). The floating brackets (822) are slidably inserted into the reaction force frame (7). The sliding direction of the floating brackets (822) is perpendicular to the axial direction of the workpiece (6). An elastic member is arranged between the floating brackets (822) and the reaction force frame (7). The elastic member is used to provide an elastic force for squeezing the floating brackets (822) towards the workpiece (6). A pulley (823) is rotatably installed in the floating brackets (822). The belt (821) is sleeved outside the pulley (823) to form a track structure.

5. The pallet structure of a double-row tool CNC machine tool according to claim 4, characterized in that: The outer surface of the belt (821) is provided with a receiving groove (824). A liquid injection pipe (9) is arranged in the receiving groove (824). Both ends of the liquid injection pipe (9) extend out of the receiving groove (824) and are connected to the reaction force frame (7) through an elastic mounting frame (91). One end of the liquid injection pipe (9) is connected to a liquid injection pump which is used to provide high-pressure cutting fluid into the liquid injection pipe (9). The other end of the liquid injection pipe (9) is a sealed end. A release hole (92) is arranged in the middle of the liquid injection pipe (9).

6. A double-row tool CNC machine tool pallet structure according to claim 3 or 5, characterized in that: The pulling and positioning assembly (5) includes a pulling and guiding seat (51), a pulling frame (52), and a first pulling and positioning device (53) arranged on the pulling frame (52). The pulling and guiding seat (51) is fixedly connected to the headstock (11) and is distributed along the axial direction of the workpiece (6). At the same time, the pulling frame (52) is slidably mounted on the pulling and guiding seat (51). A linear driver for driving the pulling frame (52) to move in the X-axis direction is arranged on the pulling and guiding seat (51). The first pulling and positioning device (53) includes a support cylinder (531) and a threaded rod (532). The support cylinder (531) is fixedly mounted on the pulling frame (52). The threaded rod (532) is threadedly inserted into the support cylinder (531). A docking bolt (533) is rotatably mounted at one end of the threaded rod (532) corresponding to the headstock (11). The docking bolt (533) is arranged corresponding to a threaded hole pre-opened at the end of the workpiece (6).

7. A double-row tool CNC machine tool pallet structure according to claim 6, characterized in that: Multiple groups of horizontally distributed mounting grooves are arranged on the tool tray (2). The cutting tool (31) is mounted in the mounting groove of the tool tray (2) through a tool holder (32). The tool assembly (3) further includes a drilling tool (33). Multiple groups of drilling tools (33) are arranged on one side of a group of tool trays (2) corresponding to the headstock (11). The drilling tools (33) are fixedly connected to the tool tray (2) through a tool holder (34). The tool holder (34) is fixedly mounted on the tool tray (2). Multiple groups of mounting hole positions for mounting the drilling tools (33) are arranged on the tool holder (34).

8. A double-row tool CNC machine tool pallet structure according to claim 7, characterized in that: The pulling and positioning assembly (5) further includes another set of pulling guide seats (51), a pulling frame (52), and a second pulling positioner (54) provided on the pulling frame (52). A linear drive is provided between the pulling frame (52) and the pulling guide seat (51). The second pulling positioner (54) includes two sets of clamping plates (541). The two sets of clamping plates (541) are slidably mounted on the pulling frame (52). On the side of the clamping plate (541) corresponding to the workpiece (6), two sets of positioning wheels (542) are provided. The two sets of positioning wheels (542) are symmetrically distributed up and down. The positioning wheel (542) is mounted on the clamping plate (541) through a positioning wheel frame (543). The positioning wheel (542) is rotatably mounted in the positioning wheel frame (543). An oblique guiding mechanism (544) is fixedly mounted on the clamping plate (541). The oblique guiding mechanism (544) is arranged to gradually move away from the workpiece (6) in the direction away from the headstock (11). The positioning wheel frame (543) is slidably mounted on the oblique guiding mechanism (544).

9. The pallet structure of a double-row tool CNC machine tool according to claim 8, characterized in that: The feed drive assembly (4) includes a Z-axis moving seat (41), an X-axis moving seat (42), and a Y-axis moving seat (43). The Z-axis moving seat (41) is slidably mounted on the side wall of the headstock (11) along the Z-axis direction. The X-axis moving seat (42) is slidably mounted on the Z-axis moving seat (41) along the X-axis direction. The Y-axis moving seat (43) is slidably mounted on the front end of the X-axis moving seat (42) along the Y-axis direction. The tool tray (2) is fixedly mounted on the Y-axis moving seat (43). Between the Z-axis moving seat (41) and the headstock (11), between the X-axis moving seat (42) and the Z-axis moving seat (41), and between the Y-axis moving seat (43) and the X-axis moving seat (42), they are all slidably mated through linear guide rails. Between the Z-axis moving seat (41) and the headstock (11), between the X-axis moving seat (42) and the Z-axis moving seat (41), and between the Y-axis moving seat (43) and the X-axis moving seat (42), linear drives (44) are provided.

10. A double-row tool CNC machine tool pallet structure according to claim 9, characterized in that: The tool rest (32) is rotatably mounted in the mounting groove of the tool tray (2). A torsion elastic member is provided between the tool rest (32) and the mounting groove of the tool tray (2). The torsion elastic member is used to provide an elastic force for the tool rest (32) to flip in the direction away from the tool tray (2). One end of the tool rest (32) facing away from the cutting tool (31) is fixedly connected with a tail block (321). A pusher (35) is further provided on the tool tray (2). The pusher (35) is arranged corresponding to the tail block (321). A pusher fixing head (36) is provided at the output end of the pusher (35). The pusher (35) pushes the tail block (321) by driving the pusher fixing head (36) to extend, so that the tool rest (32) is fixedly attached to the tool tray (2).

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