A vertical CNC machine tool with multiple spindles

Abstract

The present invention relates to the technical field of numerical control machine tools, and specifically, to a vertical numerical control machine tool with multiple spindles. It includes spindle components, a chuck, and an infusion tube arranged on one side of the spindle components. The infusion tube is oriented towards the tool, and further includes a valve control mechanism and a cleaning mechanism, wherein: the cleaning mechanism is communicated with the infusion tube, and a valve is arranged at the communication point, and the valve is connected to the valve control mechanism; in this vertical numerical control machine tool with multiple spindles, by distributing the coolant in the infusion tube when the tool disengages from the workpiece, the waste of part of the coolant generated during this process is avoided. In this way, on the one hand, it does not affect the cooling and lubrication of the tool, and on the other hand, the excess coolant is collected for standby, so that when cleaning the chuck, there is no need to make the infusion tube continue to transport the coolant after the processing is completed, reducing the consumption of the coolant.

Description

Technical Field

[0001] The present invention relates to a cleaning mechanism in the technical field of numerical control machine tools, and more specifically, to a vertical numerical control machine tool with multiple spindles. Background Art

[0002] Numerical control is the conversion of the circuit thinking constructed by computer programming into digital technology and the operation of processing control through a numerical control lathe. A vertical numerical control lathe is a type of numerical control equipment, mainly used for processing various parts. At present, with the breakthrough of R & D technology, a single device can be equipped with two spindles and a platform for processing.

[0003] A multi-spindle vertical numerical control machine tool can simultaneously process multiple workpieces through multiple spindles, thereby improving work efficiency. However, since the spindles and chucks inside the numerical control lathe are paired, when the machine tool processes a single workpiece, the chips cut off from the workpiece during the processing are likely to splash on other unprocessed chucks. The accumulated chips are easily carried by the flowing coolant and enter the gaps of the working chucks. As a result, when the machine is restarted, it is necessary to use liquid to flush and clean the chucks.

[0004] Currently, usually after the processing is completed (i.e., the equipment stops), the coolant is continuously controlled to flow out from the infusion pipe (installed near the spindle, used to convey the coolant to the tool and the workpiece for cooling and lubrication), and the coolant is collected, and then the coolant is used to clean the chuck. However, this will cause the infusion pipe to continue to convey the coolant for a period of time after the processing is completed, resulting in a large consumption of coolant. Summary of the Invention

[0005] The purpose of the present invention is to provide a vertical numerical control machine tool with multiple spindles, which shunts the coolant during the upward movement of the spindle assembly to collect the excess coolant during the non-processing period, thereby solving the problem raised in the above background art, that is, the infusion pipe needs to continue to convey the coolant for a period of time after the processing is completed, resulting in a large consumption of coolant.

[0006] To achieve the above object, the vertical numerical control machine tool with multiple spindles includes a spindle assembly, a chuck, and an infusion pipe arranged on one side of the spindle assembly. The infusion pipe is directed towards the tool, and further includes a valve control mechanism and a cleaning mechanism, wherein:

[0007] The cleaning mechanism is communicated with the infusion pipe, and a valve is arranged at the communication position. The valve is connected to the valve control mechanism;

[0008] The valve control mechanism has a free state for controlling the valve to close and a restricted state for controlling the valve to open. When the height of the main shaft component moving upward corresponds to a preset height, the valve control mechanism is in the restricted state; in the restricted state, part of the coolant in the infusion tube flows into the cleaning mechanism through the valve.

[0009] The cleaning mechanism is used to spray the internal coolant to the area to be cleaned to clean the area to be cleaned.

[0010] In the above technical solution, the cleaning mechanism is connected to the infusion tube and can split the coolant. When the main shaft component moves upward, it means that the cutting tool is not in the working state at this time. At this time, the valve is controlled to open through the valve control mechanism, and part of the coolant in the infusion tube is collected into the cleaning mechanism, thus avoiding the waste of this part of the coolant, and there is no need to collect the coolant after the processing is completed.

[0011] On this basis, a shunt tube is connected to one side of the infusion tube, and a liquid outlet tube with one end connected to the cleaning mechanism is connected to the bottom of the shunt tube.

[0012] The valve includes a valve ball slidably arranged in the shunt tube. The valve ball has a first position and a second position; the first position is located on the side of the liquid outlet tube close to the infusion tube for disconnecting the shunt tube and the liquid outlet tube; the second position is located on the side of the liquid outlet tube far from the infusion tube for connecting the shunt tube and the liquid outlet tube; the valve control mechanism controls the valve ball to switch between the first position and the second position.

[0013] The valve control mechanism includes a first slide rail arranged along the X-axis direction and a second slide rail arranged along the Y-axis direction. Among them, the second slide rail is slidably connected to the first slide rail, and a slider is slidably connected to the top of the second slide rail. The slider is connected to the valve ball through a traction rope; a return spring for elastically connecting the valve ball and one end of the shunt tube is arranged between the valve ball and one end of the shunt tube.

[0014] Here, the structure of the valve control mechanism and the valve is specifically described. According to the above, the valve control mechanism only has the ability to move in the X and Y axes. Therefore, when the main shaft component moves upward in the Z-axis direction, the valve control mechanism will control the displacement of the valve ball to open the connecting part by the valve ball.

[0015] In another technical solution, the cleaning mechanism includes a liquid storage cylinder connected to the liquid outlet tube, and a piston slidably arranged in the liquid storage cylinder. A driving mechanism for driving the piston to reciprocate is arranged at the bottom of the piston.

[0016] A transmission rod is fixedly connected to the bottom of the second slide rail; one end of the liquid outlet pipe communicates with a flow limiting pipe, one end of the flow limiting pipe communicates with a connecting pipe, and one end of the connecting pipe communicates with the top of the liquid storage cylinder; the inner diameter of the flow limiting pipe is smaller than that of the connecting pipe; an expansion pipe made of rubber material is arranged at the position of the connecting pipe corresponding to the transmission rod, and the expansion pipe drives the transmission rod to move through expansion, so that the liquid infusion pipe switches from facing the tool to facing the chuck.

[0017] In this technical solution, the coolant in the liquid storage cylinder can flow back into the liquid infusion pipe again. During the reflux process, the flow rate of the reflux is restricted by the inner diameter of the flow limiting pipe, so that the expansion pipe expands under pressure to drive the liquid infusion pipe to change its orientation. On the one hand, it can clean the chuck, and on the other hand, it can also clean the processed workpiece.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] 1. In this multi-spindle vertical CNC machine tool, the coolant in the liquid infusion pipe is distributed when the tool disengages from the workpiece, avoiding waste of some coolant generated during this process. In this way, on the one hand, it does not affect the cooling and lubrication of the tool, and on the other hand, the excess coolant is collected for standby. Therefore, when cleaning the chuck, there is no need to make the liquid infusion pipe continue to transport coolant after the processing is completed, reducing the consumption of coolant.

[0020] 2. In this multi-spindle vertical CNC machine tool, the valve control mechanism can not only control the valve to open during the upward movement of the spindle component, but also use the reflux coolant to change the orientation position of the liquid infusion pipe when the spindle component is in the initial position, so that the liquid infusion pipe switches from facing the tool to facing the chuck. Furthermore, the collected coolant flows out to the chuck through the liquid infusion pipe in a reflux manner, thereby cleaning the chuck. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic diagram of the overall structure of the present invention Figure 1 ;

[0022] Figure 2 is a schematic diagram of the overall structure of the present invention Figure 2 ;

[0023] Figure 3 is a schematic cross-sectional structure diagram of the flow dividing pipe of the present invention;

[0024] Figure 4 is a schematic structure diagram of the valve control mechanism of the present invention;

[0025] Figure 5 is a schematic structure diagram of the cleaning mechanism of the present invention Figure 1 ;

[0026] Figure 6Structural schematic of the cleaning mechanism of the present invention Figure 2 ;

[0027] Figure 7 Structural schematic of the flow-limiting tube of the present invention;

[0028] Figure 8 Of the present invention Figure 7 Enlarged schematic of the A-out structure;

[0029] Figure 9 Structural schematic of the infusion tube of the present invention.

[0030] The meanings of each label in the figure are as follows:

[0031] 100, workbench; 101, machine shell; 102, main shaft component; 110, infusion tube; 120, shunt tube; 121, liquid outlet tube; 122, valve ball; 123, towing rope; 124, return spring; 125, connecting tube; 126, flow-limiting tube; 127, expansion tube; 128, transmission rod; 130, valve control mechanism; 131, first slide rail; 132, second slide rail; 133, slider; 134, connecting spring; 140, cleaning mechanism; 141, liquid storage cylinder; 142, liquid discharge port; 143, piston; 144, hydraulic rod; 145, aggregate box; 146, support spring; 147, baffle; 148, through port. Detailed implementation manners

[0032] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0033] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention.

[0034] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more such features. In the description of the present invention, "a plurality" means two or more, unless otherwise specifically defined.

[0035] Regarding the problem that using coolant to clean the chuck causes the infusion tube 110 to continue to transport coolant for some time after the machining is completed, resulting in a relatively large consumption of coolant, the present invention provides a multi-spindle vertical CNC machine tool, as Figure 2 shown. The vertical CNC machine includes spindle components 102 and a chuck, and two sets of spindle components 102 and chucks are provided; the chuck is located below the spindle components 102 and is used to fix the workpiece; a tool is provided at the bottom of the spindle components 102 to machine the workpiece on the chuck. Among them, the spindle components 102 and the chuck are both installed on the top of the workbench 100 and are isolated from the outside through the housing 101 provided on the top of the workbench 100 to avoid harm to the staff.

[0036] The shape and structure of the housing 101 are as Figure 1 shown, and an observation window made of glass is provided on its side wall to facilitate people to observe the machining state of the workpiece.

[0037] As Figure 2 shown, an infusion tube 110 is provided on one side of the spindle component 102. The input end of the infusion tube 110 is connected to the coolant delivery system, and the other end is oriented towards the tool. At this time, the coolant enters the infusion tube 110 through the coolant delivery system and then flows from the output end of the infusion tube 110 to the tool to cool and lubricate the tool. Moreover, when the tool contacts the workpiece on the chuck, the coolant will also cool and lubricate the workpiece. During this process, since the infusion tube 110 is connected to the spindle component 102, it will move together with the spindle component 102.

[0038] During the machining process, taking drilling as an example, the spindle unit 102 moves downward from the initial position to contact the workpiece, completing the machining of the first hole. Then, the spindle unit 102 moves upward away from the workpiece and adjusts its horizontal position. Subsequently, it continues to move downward to complete the machining of the second hole, and then continues to cycle. During this process, the coolant is usually not interrupted, that is, the coolant continuously flows out through the infusion pipe 110 after the drilling starts and is interrupted only after the machining of the last hole is completed. It can be seen that when the spindle unit 102 moves upward away from the workpiece, the coolant will still be discharged through the infusion pipe 110. Although the coolant can cool the tool, the tool is not performing cutting operations at this time, so there is no need for a large amount of coolant for cooling. However, the flow rate of the coolant discharged from the infusion pipe 110 is fixed, which results in waste of some coolant.

[0039] Therefore, the vertical CNC machine tool further includes a valve control mechanism 130 and a cleaning mechanism 140. Among them, the cleaning mechanism 140 is communicated with the infusion pipe 110, and a valve is provided at the communication point. The valve is connected to the valve control mechanism 130;

[0040] The valve control mechanism 130 has a free state for controlling the valve to close and a restricted state for controlling the valve to open. When the height at which the spindle unit 102 moves upward corresponds to a preset height, the valve control mechanism 130 is in the restricted state; in the restricted state, a part of the coolant in the infusion pipe 110 flows into the cleaning mechanism 140 through the valve;

[0041] The cleaning mechanism 140 includes a drain port 142 (refer to Figure 5 ) provided corresponding to the chuck, which is used to spray the coolant inside to the chuck through the drain port 142 to clean the chuck.

[0042] Specifically, the cleaning mechanism 140 and the infusion pipe 110 are communicated through a shunt pipe 120. As Figure 3 shown, one end of the shunt pipe 120 is communicated with the infusion pipe 110, and the communication point preferably selects the bent part of the infusion pipe 110 to facilitate the coolant to flow into the shunt pipe 120. And, the bottom of the shunt pipe 120 is communicated with a liquid outlet pipe 121 whose one end is communicated with the cleaning mechanism 140. In this way, the coolant in the shunt pipe 120 can flow into the cleaning mechanism 140 through the liquid outlet pipe 121.

[0043] The valve includes a valve ball 122 slidably disposed within the shunt pipe 120. The outer diameter of the valve ball 122 is consistent with the inner diameter of the shunt pipe 120 to block the shunt pipe 120. In addition, sliding enables the valve ball 122 to have two positions, which are respectively on both sides of the liquid outlet pipe 121, that is, the side of the liquid outlet pipe 121 close to the infusion pipe 110 and the side of the liquid outlet pipe 121 far from the infusion pipe 110. The valve ball 122 is controlled by a valve control mechanism 130 to switch back and forth between these two positions, realizing the control of the on-off between the shunt pipe 120 and the liquid outlet pipe 121. For the specific control structure, refer to Figure 4 .

[0044] As Figure 4 shown, the valve control mechanism 130 includes two first slide rails 131 disposed along the X-axis direction and one second slide rail 132 disposed along the Y-axis direction. Among them, the second slide rail 132 is slidably connected to the first slide rail 131, and the top of the second slide rail 132 is slidably connected to a slider 133. A traction rope 123 is connected between the slider 133 and the valve ball 122. A return spring 124 that elastically connects the valve ball 122 and one end of the shunt pipe 120 is provided between them.

[0045] During specific implementation, side plates are provided at both ends of the first slide rail 131. The direction of the side plates corresponds to the Y-axis direction. The side plates are fixed at both ends of the first slide rail 131 to fix the distance between the two first slide rails 131. At the same time, the side plates are fixedly provided on the inner wall of the Figure 2 housing 101 in

[0046] . Then, slide plates are fixedly provided at both ends of the second slide rail 132. The slide plates are slidably disposed on the top of the first slide rail 131. At this time, both the second slide rail 132 and the slider 133 have the ability to move along the X-axis direction. In this way, since the slider 133 is connected to the second slide rail 132, the slider 133 already has the ability to move along the Y-axis direction, and combined with the X-axis sliding of the second slide rail 132, the slider 133 can move to any position on the X and Y axes. Then, one end of the traction rope 123 is fixedly connected to the slider 133, and the other end passes through the end of the shunt pipe 120 and is fixedly connected to the valve ball 122.

[0047] Refer to Figure 3 . Figure 3The valve ball 122 in it is in position a', and the height at the bottom of the tool is height a. When the spindle component 102 drives the tool and the infusion tube 110 to move horizontally (i.e., in the X and Y axis directions), the infusion tube 110 drives the valve ball 122 to move through the shunt tube 120. Since the elastic force of the return spring 124 is greater than the frictional force between the first slide rail 131 and the second slide rail 132 and the frictional force between the second slide rail 132 and the slider 133, therefore, under the elastic push of the return spring 124, the valve ball 122 will not generate displacement, and thus the slider 133 is pulled through the towing rope 123 to move horizontally. When the spindle component 102 drives the tool to rise from height a to height b, at this time, since the slider 133 cannot move upward, the distance between the shunt tube 120 and the slider 133 will become larger, forcing the return spring 124 to compress, and thus the valve ball 122 is pulled through the towing rope 123 to move from position a' to position b'. At this time, the valve ball 122 passes through the liquid outlet pipe 121, and the shunt tube 120 is communicated with the liquid outlet pipe 121.

[0048] From the above content, it can be understood that when the spindle component 102 moves horizontally (i.e., in the X and Y axis directions), the spindle component 102 can drive the slider 133 to move synchronously in the X and Y axis directions through the towing rope 123, and will not restrict the valve ball 122. Therefore, at this time, the state of the slider 133 is a free state; when the spindle component 102 moves upward, since the slider 133 cannot move upward, the valve ball 122 is restricted. Therefore, at this time, the state of the slider 133 is a restricted state.

[0049] It should be understood that the distance that the spindle component 102 drives the tool to move from height a to height b corresponds to the distance that the valve ball 122 moves from position a' to position b'. Therefore, when the valve ball 122 is in position b' (i.e., on the side of the liquid outlet pipe 121 away from the infusion tube 110), the height of the spindle component 102 corresponding to height b is the preset height.

[0050] It should be noted that at the preset height, the height of the bottom end of the tool should be higher than the height of the top of the workpiece, that is, there is a non-contact state between the bottom end of the tool and the top of the workpiece. At the same time, the liquid outlet pipe 121 is preferably located in the middle of the shunt tube 120. Through this design, when the valve ball 122 is in position b', there is still a space for the valve ball 122 to displace and the return spring 124 to compress between the valve ball 122 and the end of the shunt tube 120, so as to realize the further upward movement of the spindle component 102 to the initial position.

[0051] Such as Figure 5As shown in the figure, the cleaning mechanism 140 includes a liquid storage cylinder 141 that communicates with the liquid outlet pipe 121 and the liquid discharge port 142. The liquid storage cylinder 141 is fixedly arranged on the top of the workbench 100, and the liquid discharge port 142 faces the chuck. A piston 143 is slidably arranged in the liquid storage cylinder 141. A driving mechanism is arranged at the bottom of the piston 143, and the piston 143 is driven to move upward by the driving mechanism to squeeze out the coolant in the liquid storage cylinder 141 through the liquid discharge port 142.

[0052] During implementation, a connecting pipe 125 is connected to the bottom end of the liquid outlet pipe 121 (refer to Figure 7 ), and then one end of the connecting pipe 125 is connected to the liquid storage cylinder 141. The connection position should be above the piston 143 to enable the coolant to enter the liquid storage cylinder 141. Two conduits are connected to the top of the liquid storage cylinder 141. The top ends of the conduits are the liquid discharge ports 142, and the top ends of the two conduits are bent towards the corresponding chucks respectively (specifically refer to Figure 5 ). Then, a hydraulic rod 144 is arranged at the bottom of the piston 143, and the hydraulic rod 144 is installed inside the workbench 100 or penetrates through the liquid infusion pipe 110.

[0053] When the piston 143 moves upward, the coolant will be sprayed out through the two liquid discharge ports 142 simultaneously. Among them, the chuck corresponding to one of the liquid discharge ports 142 holds a workpiece, so there is no need to clean it. To ensure that the liquid in the liquid storage cylinder 141 only cleans the chuck without holding a workpiece, as Figure 5 shown, aggregate boxes 145 are slidably arranged on both sides of the liquid storage cylinder 141 facing the chuck. The outer edge of the aggregate box 145 is bent upward to collect the splashed coolant and debris. The aggregate box 145 is elastically connected to the top of the workbench 100 through the support spring 146 at the bottom. In this way, after collecting the coolant and debris, the support spring 146 can be compressed by the gravity of the coolant and debris, so as to move downward. As Figure 6 shown, a baffle 147 with a side wall fitting the end of the liquid discharge port 142 is fixedly arranged at the top of the aggregate box 145. A through port 148 is arranged on the side wall of the baffle 147. The position of the through port 148 corresponds to the position of the liquid discharge port 142. Specifically, when the support spring 146 is not compressed, the through port 148 communicates with the liquid discharge port 142.

[0054] The cleaning process of the vertical CNC machine tool will be described in detail below.

[0055] As Figure 3As shown, when the bottom end of the tool is at height a, the height of the tool is lower than that of the workpiece to machine the workpiece. When the spindle unit 102 moves upward to drive the bottom end of the tool to be at height b, the infusion tube 110 will also move upward accordingly. The upward movement of the infusion tube 110 drives the shunt tube 120, and the shunt tube 120 drives the valve ball 122. The valve ball 122 is restricted by the pulling of the traction rope 123, so it moves from position a' to position b'. At this time, the shunt tube 120 is communicated with the liquid outlet tube 121, and part of the coolant in the infusion tube 110 enters the liquid storage cylinder 141 through the shunt tube 120, the liquid outlet tube 121 and the connecting tube 125.

[0056] Refer to Figure 5 , assuming that a workpiece is clamped on the chuck on the right side, then part of the coolant for cooling the workpiece on the right side will splash into the aggregate box 145 on the right side. As the machining continues, the coolant in the aggregate box 145 on the right side gradually increases, thus overcoming the elastic force of the support spring 146 and causing the aggregate box 145 on the right side to move downward. At this time, the aggregate box 145 drives the baffle 147 to move downward, so that the through port 148 is disengaged from the liquid discharge port 142 on the right side to block the liquid discharge port 142 on the right side with the baffle 147. Since the aggregate box 145 on the left side is far from the chuck on the right side, the amount of coolant splashed in is less, and at the same time, the liquid storage cylinder 141 also plays a blocking role. In this way, the liquid discharge port 142 on the left side is in an open state.

[0057] When the machining is completed, the driving piston 143 moves upward. The upward movement of the piston 143 squeezes the coolant in the liquid storage cylinder 141, and the coolant is sprayed onto the left chuck through the liquid discharge port 142 on the left side to clean the debris on the left chuck.

[0058] That is to say, by distributing the coolant in the infusion tube 110 when the tool is separated from the workpiece, the waste of part of the coolant generated during this process is avoided. In this way, on the one hand, it does not affect the cooling and lubrication of the tool, and on the other hand, the excess coolant is collected for standby. Thus, when cleaning the chuck, there is no need for the infusion tube 110 to continue to supply coolant after the machining is completed, reducing the consumption of coolant.

[0059] In addition, to further improve the cleaning efficiency of the chuck. As Figure 7 shown, in some embodiments, a transmission rod 128 is fixedly connected to the bottom of the second slide rail 132; the communicating part of the connecting tube 125 and the liquid storage cylinder 141 is at the top of the liquid storage cylinder 141, and the connecting tube 125 and the liquid outlet tube 121 are connected through a flow limiting tube 126, and the inner diameter of the flow limiting tube 126 is smaller than that of the connecting tube 125. Then, as Figure 8 shown, an expansion tube 127 is provided at the part of the connecting tube 125 corresponding to the transmission rod 128, and the expansion tube 127 is preferably made of rubber material.

[0060] In this way, refer toFigure 9 When the machining is completed, the spindle unit 102 resets to the initial position. At the same time, the height of the initial position is higher than the height b. Therefore, the valve ball 122 is also on the right side of the position b'. At this time, the shunt pipe 120 is communicated with the liquid outlet pipe 121, and the return spring 124 is in a compressed state. Then, the cleaning of the chuck can be divided into the following two methods:

[0061] In the first method, the piston 143 moves upward to squeeze the coolant, so that a part of the coolant is discharged through the liquid discharge port 142 to clean the chuck, and the other part of the coolant is discharged into the connecting pipe 125. However, due to the small inner diameter of the flow limiting pipe 126, the passing speed of the coolant is reduced. At this time, the pressure in the connecting pipe 125 will increase, forcing the expansion pipe 127 to expand outward. During the expansion process of the expansion pipe 127, the transmission rod 128 is pushed to move. The movement of the transmission rod 128 drives the second slide rail 132 and the slider 133. The slider 133 pulls the valve ball 122 to move through the traction rope 123. However, since the return spring 124 has been compressed, the movement of the valve ball 122 will drive the shunt pipe 120 to move through the return spring 124. The movement of the shunt pipe 120 pulls the bottom end of the infusion pipe 110 to deform, so that the infusion pipe 110 switches from facing the tool to facing the chuck. At this time, the coolant in the connecting pipe 125 enters the shunt pipe 120 through the flow limiting pipe 126 and the liquid outlet pipe 121, and then enters the infusion pipe 110 through the shunt pipe 120, and finally is discharged onto the chuck through the infusion pipe 110 to clean the chuck.

[0062] In the second method, the setting of the liquid discharge port 142 is cancelled, that is, the liquid discharge port 142 is not provided at the top of the liquid storage cylinder 141 (it should be understood that after the liquid discharge port 142 is not provided, the aggregate box 145, the support spring 146, the baffle 147 and the through port 148 do not need to be provided either), so that the coolant in the liquid storage cylinder 141 can only flow back into the infusion pipe 110 through the connecting pipe 125, the flow limiting pipe 126, the liquid outlet pipe 121 and the shunt pipe 120. During the reflux process, the expansion pipe 127 expands to push the transmission rod 128 to move. The subsequent working principle has been specifically described in the above first method, so it will not be elaborated here.

[0063] It can be seen from this that the valve control mechanism 130 can not only control the valve to open during the upward movement of the spindle unit 102, but also use the reflux coolant to change the orientation position of the infusion pipe 110 when the spindle unit 102 is in the initial position, so that the infusion pipe 110 switches from facing the tool to facing the chuck, and then the collected coolant flows out onto the chuck through the infusion pipe 110 in a reflux manner, thereby cleaning the chuck.

[0064] Moreover, since the height of the infusion tube 110 is higher than that of the workpiece, after the coolant flows back into the infusion tube 110, the coolant can also clean the workpiece that has been processed on the chuck (this cannot be achieved by the drain port 142 mentioned above because a higher position of the drain port 142 will affect the movement of the spindle unit 102).

[0065] It should be noted that the part of the connecting tube 125 corresponding to the expansion tube 127 is preferably made of a rigid material (such as a metal material), and this part is fixed to the top of the workbench 100 to limit the expansion tube 127, while the rest of the connecting tube 125 is made of a flexible material to avoid affecting the movement of the shunt tube 120. At the same time, the infusion tube 110 is made of an elastic metal material, and the elastic coefficient of the infusion tube 110 is greater than the elastic coefficients of the return spring 124 and the connecting spring 134 (which will be described in detail later).

[0066] And, as shown in Figure 4 a connecting spring 134 is provided between the side wall of the second slide rail 132 and the side plate at the end of the first slide rail 131. The connecting spring 134 can drive the second slide rail 132 to reset. When the towing rope 123 exerts an upward force on the slider 133, the connecting spring 134 can drive the second slide rail 132 to reset. In this way, the transmission rod 128 at the bottom of the second slide rail 132 will always be against the side wall of the expansion tube 127 to push the transmission rod 128 to move during the expansion of the expansion tube 127. At the same time, the bottom height of the transmission rod 128 is higher than the top height of the expansion tube 127 when it is not expanded.

[0067] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification are only preferred examples of the present invention and are not used to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A vertical numerically controlled machine tool with multiple spindles, comprising a spindle component (102), a chuck, and an infusion tube (110) arranged on one side of the spindle component (102), the infusion tube (110) being oriented towards the tool, characterized in that: It further includes a valve control mechanism (130) and a cleaning mechanism (140), where: The cleaning mechanism (140) is communicated with the infusion tube (110), and a valve is provided at the communication position, and the valve is connected to the valve control mechanism (130); The valve control mechanism (130) has a free state for controlling the valve to close and a restricted state for controlling the valve to open. When the height of the upward movement of the main shaft component (102) corresponds to a preset height, the valve control mechanism (130) is in the restricted state; in the restricted state, part of the coolant in the infusion tube (110) flows into the cleaning mechanism (140) through the valve; The cleaning mechanism (140) is used to spray the internal coolant to the area to be cleaned to clean the area to be cleaned; One side of the infusion tube (110) is communicated with a shunt tube (120), and the bottom of the shunt tube (120) is communicated with a liquid outlet tube (121) with one end communicated with the cleaning mechanism (140); The valve includes a valve ball (122) slidably arranged in the shunt tube (120), and the valve ball (122) has a first position and a second position; The first position is located on the side of the liquid outlet tube (121) close to the infusion tube (110) for disconnecting the shunt tube (120) and the liquid outlet tube (121); The second position is located on the side of the liquid outlet tube (121) far from the infusion tube (110) for connecting the shunt tube (120) and the liquid outlet tube (121); The valve control mechanism (130) controls the valve ball (122) to switch between the first position and the second position; The valve control mechanism (130) includes a first slide rail (131) arranged along the X-axis direction and a second slide rail (132) arranged along the Y-axis direction. Among them, the second slide rail (132) is slidably connected to the first slide rail (131), and the top of the second slide rail (132) is slidably connected with a slider (133), and the slider (133) is connected to the valve ball (122) through a traction rope (123); a return spring (124) for elastically connecting the valve ball (122) and one end of the shunt tube (120) is arranged between them; The cleaning mechanism (140) includes a liquid storage cylinder (141) communicated with the liquid outlet tube (121), and a piston (143) slidably arranged in the liquid storage cylinder (141), and a driving mechanism for driving the piston (143) to reciprocate is arranged at the bottom of the piston (143).

2. The vertical numerical control machine tool with multiple spindles according to claim 1, characterized in that: When the valve ball (122) is in the second position, the main shaft component (102) is at the preset height.

3. The vertical numerical control machine tool with multiple main spindles according to claim 1, characterized in that: The top of the liquid storage cylinder (141) is communicated with a liquid discharge port (142) facing the chuck, and the piston (143) extrudes the coolant through the liquid discharge port (142) by moving upward.

4. The vertical numerical control machine tool with multiple spindles according to claim 3, characterized in that: On both sides of the liquid storage cylinder (141) facing the chuck, there are slidingly arranged aggregate boxes (145) for collecting splashing coolant. The bottom of the aggregate box (145) is connected to the top of the workbench (100) through elastic members; a baffle (147) with a side wall fitting the end of the liquid discharge port (142) is fixedly arranged at the top of the aggregate box (145), and a through port (148) is arranged through the side wall of the baffle (147).

5. The vertical numerical control machine tool with multiple spindles according to claim 1, wherein: A transmission rod (128) is fixedly connected to the bottom of the second slide rail (132); one end of the liquid outlet pipe (121) is communicated with a flow limiting pipe (126), one end of the flow limiting pipe (126) is communicated with a connecting pipe (125), and one end of the connecting pipe (125) is communicated with the top of the liquid storage cylinder (141); The inner diameter of the flow limiting pipe (126) is smaller than the inner diameter of the connecting pipe (125); At the position of the connecting pipe (125) corresponding to the transmission rod (128), there is an expansion pipe (127) made of rubber material. The expansion pipe (127) drives the transmission rod (128) to move through expansion, so that the infusion pipe (110) switches from facing the tool to facing the chuck.

6. The vertical numerical control machine tool with multiple main spindles according to claim 5, characterized in that: The part of the connecting pipe (125) corresponding to the expansion pipe (127) is made of hard material, and the rest is made of flexible material; The infusion pipe (110) is made of elastic metal material, and the elastic coefficient of the infusion pipe (110) is greater than the elastic coefficients of the return spring (124) and the connecting spring (134).

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