A precision machining center

Abstract

The present invention provides a precision machining center, relating to the field of CNC machining technology, comprising a tool magazine and a tool changing mechanism. The tool magazine is provided with a plurality of cutting tools fixed to a cutter disc in a circular array. When the tool magazine rotates to a tool changing position, the tool changing mechanism removes the cutting tools that have moved to the tool changing position. A liquid dispensing member is dynamically sealed on the cylindrical surface of the cutter disc, and a liquid dispensing channel is provided within the liquid dispensing member. The liquid dispensing member is connected to a universal bamboo tube that delivers cutting fluid to the cutting area. The cutting tools are vertically plugged and mounted on the end face of the cutter disc. Each cutting tool is correspondingly provided with a control valve that controls the input of the corresponding cutting fluid. When a cutting tool that has moved to the tool changing position is removed by the tool changing mechanism, the corresponding control valve is opened, allowing the corresponding cutting fluid to flow into the liquid dispensing channel and then into the universal bamboo tube. The present invention can automatically adapt to the cutting fluid preset for the corresponding cutting tool, thereby improving machining accuracy.

Description

Technical Field

[0001] The present invention relates to the technical field of numerical control machining, in particular to a precision machining center. Background Art

[0002] A CNC milling machine, also known as a milling machine, is a milling machine controlled by digital electronic signals. It is an automatic processing device developed based on conventional milling machines. The processing techniques used are essentially the same, and their structures are somewhat similar. CNC milling machines are divided into two categories: those without a tool magazine and those with one. CNC milling machines with a tool magazine are also called machining centers.

[0003] In existing technology, machining centers evolved from CNC milling machines. Their key difference lies in their ability to automatically swap tools. By installing tools for different purposes in a tool magazine, the tool changer can change the tool on the spindle during a single setup, enabling multiple machining functions. During machining, machining centers require tool cooling to keep the tool cool and prevent sparks and debris from flying. The higher precision achieved by machining centers stems not only from their servo systems and closed-loop feedback control via sensors, but also from the adaptability of the coolant or cutting fluid used. Existing precision machining centers typically focus on improving the software or hardware of the tools and servo systems to achieve higher machining accuracy, while neglecting the corresponding changes in the cutting fluid. In practice, the machining of some components requires different tools for different processes, and specific cutting fluids or coolants must also be used. Specifically, the cutting fluids required for each process must be pre-matched to achieve the highest possible machining accuracy.

[0004] However, in practice, since all processes are automatically controlled by CNC programs during machining, it is impossible to automatically and simply select the corresponding cutting fluid when cutting the corresponding tool to a greater extent. At present, when the cutting fluid needs to be replaced during workshop processing, it mainly relies on manual assistance to perform the conversion. The change of cutting fluid can be added to the program, but manual intervention or semi-automatic conversion is required. For machining centers that fully automatically convert cutting fluids, their specific structure is to directly set up several independent cutting fluid supply systems that are consistent with the number of tools or adaptable. The layout of these cutting fluid pipelines and the various solenoid valves are already very complicated. This is one of the fundamental reasons why existing machining centers do not match cutting fluids as one-to-one as possible.

[0005] In addition, during the processing, a lot of corresponding liquids are also needed for cooling or lubrication, such as water added for mixing. This results in a large waste of liquids such as water, cutting fluids, coolants, etc. Summary of the Invention

[0006] The purpose of the present invention is to solve the shortcomings of the prior art and propose a precision machining center that further improves machining accuracy and cutting efficiency by setting a working mechanism for automatic matching of tools and cutting fluids for machining processes that require matching cutting fluids.

[0007] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a precision machining center, including a tool magazine and a tool changing mechanism, the tool magazine is provided with a plurality of tools fixed on the tool disc in a circular array, when the tool magazine rotates to the tool changing position, the tool changing mechanism removes the tool moved to the tool changing position, the cylindrical surface of the tool disc is dynamically sealed with a liquid distribution part, a liquid distribution channel is provided in the liquid distribution part, the liquid distribution part is connected to a universal bamboo tube that transports cutting fluid to the cutting area; the tool is vertically plugged and installed on the end face of the tool disc, and each tool is correspondingly provided with a control valve for controlling the input of the corresponding cutting fluid. When a tool that moves to the tool changing position is taken out by the tool changing mechanism, the corresponding control valve is opened to allow the corresponding cutting fluid to flow into the liquid distribution channel and then into the universal bamboo tube.

[0008] Furthermore, the tool socket is installed in the socket blind hole on the tool disc, and an injection hole connected to the corresponding cutting fluid is opened on the side wall of the socket blind hole below the tool handle;

[0009] The control valve includes a pressure spring, a piston, and a push rod, wherein the pressure spring is vertically installed at the bottom of the socket blind hole, and its top end is connected to the piston slidably installed in the socket blind hole. Under normal conditions, the pressure spring causes the piston to block the injection hole, and the push rod is connected to the top surface of the piston, and the top end of the push rod is in contact with the bottom end of the tool handle; after the tool is removed, the piston is pushed up to the top of the injection hole by the pressure spring, so that the corresponding cutting fluid is injected from the injection hole and then input into the liquid distribution channel through the output hole.

[0010] Furthermore, an annular groove is provided on the cylindrical surface of the knife handle near its bottom end, and a number of elastically retractable locking pins are provided on the side wall near the hole opening in the socket blind hole. When the knife handle is inserted into the socket blind hole, the locking pins bounce into the annular groove to fix the knife handle.

[0011] Furthermore, a socket is radially provided on the side wall of the socket blind hole, and a locking pin is connected to each socket through a cylindrical spring. When the knife handle is not inserted into the socket blind hole, the cylindrical spring causes the spherical end of the locking pin to extend into the socket blind hole and can limit the upward movement of the piston.

[0012] As a complete machining center for the circulation and recovery of coolant or water, a recovery platform is provided at the bottom of the machining center, a control panel is provided on the right side of the recovery platform near the front, a water inlet is provided on the right side of the recovery platform near the back, an electric control valve is extended on the inner side of the water inlet, a water leakage net is provided on the top of the recovery platform and located inside the machining center, a processing table is provided on the top of the water leakage net, a tool is provided above the processing table, a universal bamboo tube is provided on the left side of the tool, a diverter plate is provided below the water leakage net and located near the top of the recycling platform, a first filter is provided below the diverter plate, a second filter is provided below the first filter, a submersible pump is provided below the first filter and located near the right side of the bottom of the recycling platform, a water supply pipe is provided on the top of the submersible pump, a suction pipe is provided on the left side of the submersible pump, and a water level sensor is provided on the right side of the submersible pump.

[0013] As a preferred solution of the present invention, the electric control valve is fixed to the water inlet bolts, and the electric control valve is electrically connected to the control panel.

[0014] The technical effect of adopting the above further scheme is: the electric control valve can be effectively connected to the external water source, so that water replenishment can be effectively carried out. When the water in the recovery table is lower than the water level value, the electric control valve is opened through the control panel for automatic water replenishment.

[0015] As a preferred solution of the present invention, the water leakage net is fixed to the recovery platform with bolts, and the diverter plate is fixed to the recovery platform with bolts.

[0016] The technical effect of adopting the above further solution is: the water and debris generated during processing in the machining center can be effectively allowed to flow into the recovery table through the leakage net, and the diverter plate can evenly distribute the water flow and debris on the first filter net, thereby improving the filtering effect.

[0017] As a preferred solution of the present invention, the first filter screen is slidably connected to the recovery platform, and the second filter screen is slidably connected to the recovery platform.

[0018] The technical effect of adopting the above further solution is: through the sliding connection between the first filter screen and the second filter screen and the recovery table, the filtered impurities and debris can be effectively removed, the first filter screen and the second filter screen are convenient to clean, and the debris can be effectively recovered.

[0019] As a preferred solution of the present invention, the water supply pipe is sleeved with the submersible pump, and the water supply pipe is clamped with the universal bamboo tube.

[0020] The technical effect of adopting the above further solution is that the tool can be effectively cooled during processing in the machining center through the water supply pipe and the submersible pump.

[0021] As a preferred solution of the present invention, the water level sensor is fixed to the recovery platform with bolts, and the water level sensor is electrically connected to the control panel.

[0022] The technical effect of adopting the above further solution is that the water level inside the recovery table can be effectively detected by the water level sensor, so that when water circulation is lost, it is convenient to feedback to the control panel and open the electric control valve through the control panel to replenish water.

[0023] Compared with the prior art, the beneficial effects of the present invention are: first, the present invention cleverly utilizes the existing cutter head structure, and in a simple and feasible manner, sets a corresponding cutting fluid delivery pipeline for each cutter. When the corresponding cutter is taken, the corresponding cutting fluid is automatically supplied, and during delivery, a common universal bamboo joint can be directly selected, which greatly reduces the pipeline and the number of solenoid valves, thereby simplifying the CNC program design. At the same time, it also streamlines the machining center structure as much as possible while realizing automatic switching of one cutter and one cutting fluid, providing an important prerequisite for the machining center to perform high-speed precision cutting.

[0024] In addition, in the present invention, the recovery table can effectively store water, and the leakage net can effectively allow the sewage and debris generated during processing to flow into the recovery table, and the diverter plate can effectively divert the sewage and debris, so that the sewage and debris are evenly retained on the first filter net, and the first filter net and the second filter net can effectively filter the sewage and debris, thereby leaving the impurities and debris in the sewage on top, which is convenient for subsequent cleaning, and the filtered water falls to the bottom of the recovery table, and the tool is cooled by the submersible pump, water supply pipe and universal bamboo tube, thereby realizing the recycling of water or cutting fluid and effectively reducing the waste of water or cutting fluid. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the local structure of the present invention;

[0026] Figure 2 for Figure 1 MM cross-sectional diagram in;

[0027] Figure 3 This is a schematic diagram of the control valve opening when the tool handle is removed;

[0028] Figure 4 A schematic diagram of the overall structure of a machining center;

[0029] Figure 5 This is an enlarged schematic diagram of structure A of the present invention;

[0030] Figure 6 This is a schematic diagram of the internal planar structure of the recycling platform of the present invention.

[0031] Legend: 1. Machining center; 2. Recovery table; 3. Control panel; 4. Water inlet; 5. Electric control valve; 6. Leakage net; 7. Machining table; 8. Cutting tool; 9. Universal bamboo tube; 10. Diverter plate; 11. First filter; 12. Second filter; 13. Submersible pump; 14. Water supply pipe; 15. Suction pipe; 16. Water level sensor; 17. Cutter head; 18. Cutter seat installation; 1801. Cutter handle; 1802. Annular groove; 19. Liquid dispensing part; 20. Liquid dispensing channel; 21. Output hole; 22. Lock pin; 23. Cylindrical spring; 24. Push rod; 25. Piston; 26. Pressure spring; 27. Tool changing mechanism. DETAILED DESCRIPTION

[0032] To facilitate understanding of the present invention, the present invention will be described more comprehensively below with reference to relevant references, and several embodiments of the present invention are given. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0033] Example 1

[0034] As a specific implementation structure, the present precision machining center includes a tool magazine and a tool changing mechanism 27, the tool magazine is provided with a plurality of tools 8 fixed on the tool disc 17 in a circular array, when the tool magazine rotates to the tool changing position, the tool changing mechanism 27 removes the tool 8 moved to the tool changing position, the difference is that, based on the above structure, Figure 1-3 As shown, a liquid dispensing member 19 is dynamically sealed on the cylindrical surface of the cutter disc 17, that is, the liquid dispensing member 19 is fixed and does not move. When the cutter disc 17 rotates, the cylindrical surface of the cutter disc 17 and the side surface of the liquid dispensing member 19 are dynamically sealed. At the same time, a liquid dispensing channel 20 is provided in the liquid dispensing member 19. The liquid dispensing member 19 is connected to the universal bamboo tube 9 that transports the cutting fluid to the cutting position. The cutting fluid enters the universal bamboo tube 9 from the liquid dispensing channel 20. Specifically, the tool 8 can be vertically plugged and installed on the end surface of the cutter disc 17. Each tool 8 is correspondingly provided with a control valve that controls the input of the corresponding cutting fluid. When a tool 8 that has moved to the tool changing position is removed by the tool changing mechanism 27, the corresponding control valve can be opened to allow the corresponding cutting fluid to flow into the liquid dispensing channel 20 and then into the universal bamboo tube 9. The tool 8 being used will then be supplied with the corresponding cutting fluid.

[0035] As one of the specific implementation structures, Figure 2-3The tool 8 is socket-mounted in a socket blind hole on the cutter head 17. An injection hole connected to the corresponding cutting fluid is provided on the side wall of the socket blind hole below the shank 1801 of the tool 8. In addition, the control valve specifically includes a pressure spring 26, a piston 25, and a push rod 24. The pressure spring 26 is vertically mounted at the bottom of the socket blind hole, and its top end is connected to the piston 25 slidably mounted in the socket blind hole. Under normal conditions, the pressure spring 26 must cause the piston 25 to block the injection hole, and the control valve is normally closed. The top surface of the piston 25 is connected to the push rod 24, and the top end of the push rod 24 contacts and contacts the bottom end of the shank 1801. During use, after the tool 8 is removed, the piston 25 is pushed up to the top of the injection hole by the pressure spring 26, exposing the injection hole, and then the cutting fluid flows into the socket blind hole, so that the corresponding cutting fluid can be injected from the injection hole and input into the liquid distribution channel 20 through the output hole 21, thereby realizing the supply of the corresponding cutting fluid. Of course, a one-way valve can also be installed on the output hole 21 to prevent external debris from entering at normal times, and when the cutting fluid flows through the output hole 21, it flows out through the one-way valve.

[0036] In this embodiment, two conditions must be met to achieve the supply of cutting fluid. First, the cutter disc 17 rotates and the corresponding tool 8 moves to the tool changing position. At this time, the liquid dispensing part 19 is docked with the output hole 21 of this tool 8; second, this tool 8 must be removed by the tool changing mechanism 27, and the injection hole is exposed. The cutting fluid is injected into the socket blind hole, and then output to the liquid dispensing channel 20 of the liquid dispensing part 19 through the output hole 21, and finally flows into the universal bamboo tube 9, so as to prepare a continuous supply of specific cutting fluid for this tool 8 in advance, thereby effectively avoiding the accidental opening of the cutting fluid.

[0037] like Figure 2 As shown, specifically, the knife handle 1801 of this embodiment is provided with an annular groove 1802 on the cylindrical surface near its bottom end, and a number of elastically telescopically installed locking pins 22 are provided on the side wall near the hole mouth in the socket blind hole. When the knife handle 1801 is inserted into the socket blind hole, the locking pin 22 bounces into the annular groove 1802 and fixes the knife handle 1801. In actual production, a socket can be radially provided on the side wall of the socket blind hole, and a locking pin 22 is connected to each socket through a cylindrical spring 23. When the knife handle 1801 is not inserted into the socket blind hole, the cylindrical spring 23 makes the spherical end of the locking pin 22 extend into the socket blind hole and can limit the upward movement of the piston 25. When the knife handle 1801 is inserted vertically, the locking pin 22 is squeezed, and finally the locking pin 22 slides into the annular groove 1802 to realize the installation of the knife handle 1801.

[0038] In order to further optimize the functional structure of the machining center, such as Figure 4-6As shown, in order to recycle the coolant or water, a recovery platform 2 is provided at the bottom of the traditional machining center 1 on the frame of the machining center 1. A control panel 3 is provided on the right side of the recovery platform 2 near the front. A water inlet 4 is provided on the right side of the recovery platform 2 near the back. An electric control valve 5 is provided on the inner side of the water inlet 4. A water leakage net 6 is provided on the top of the recovery platform 2 and inside the machining center 1. A machining table 7 is provided on the top of the water leakage net 6. A tool 8 is provided above the machining table 7. A tool 8 is provided on the left side of the tool 8. A universal bamboo tube 9 is provided with a diverter plate 10 below the leakage net 6 and located near the top of the recovery platform 2. A first filter screen 11 is provided below the diverter plate 10. A second filter screen 12 is provided below the first filter screen 11. A submersible pump 13 is provided below the first filter screen 11 and located near the right side of the bottom of the recovery platform 2. A water supply pipe 14 is provided on the top of the submersible pump 13, a water suction pipe 15 is provided on the left side of the submersible pump 13, and a water level sensor 16 is provided on the right side of the submersible pump 13.

[0039] Example 2

[0040] like Figure 4-6 As shown, the electric control valve 5 is bolted to the water inlet 4, and the electric control valve 5 is electrically connected to the control panel 3, which can effectively control the entry of external water source, thereby replenishing water, the leakage net 6 is bolted to the recovery platform 2, and the diverter plate 10 is bolted to the recovery platform 2, which can effectively allow sewage debris to flow into the interior of the recovery platform 2 and can effectively perform diversion, the first filter screen 11 is slidably connected to the recovery platform 2, and the second filter screen 12 is slidably connected to the recovery platform 2, which can effectively perform filtering work, the water supply pipe 14 is socketed with the submersible pump 13, and the water supply pipe 14 is clamped with the universal bamboo tube 9, which can effectively supply water and realize water recycling, the water level sensor 16 is bolted to the recovery platform 2, and the water level sensor 16 is electrically connected to the control panel 3, which can effectively detect water level changes and facilitate water replenishment.

[0041] In the filtration and recycling of the cutting fluid or water involved above, the electric control valve 5 is connected to the external water source. After completion, the external water source is injected into the recovery table 2. When the water level reaches the set value of the water level sensor 16, it is fed back to the control panel 3. At this time, the control panel 3 controls the electric control valve 5 to close. After closing, the workpiece to be processed can be taken out and fixed on the processing table 7. Subsequently, the control panel 3 is used to control the machining center 1 to process the workpiece. During the machining process, the submersible pump 13 extracts the water source inside the recovery table 2 through the water pumping pipe 15 and sends it to the water supply pipe 14. Through the universal The bamboo tube 9 is used to adjust the angle to cool the tool 8 in processing. While cooling the tool 8, the water flow will also carry debris with it from the leakage net 6, and be diverted through the diversion plate 10, and evenly sprinkled on the first filter 11. The debris is initially filtered out by the first filter 11, and then the sewage falls into the second filter 12, and the impurities are filtered out. The filtered water falls to the bottom of the recovery table 2, thereby realizing circulation. The present invention can effectively circulate water resources during the processing of the precision machining center through design, thereby reducing water waste.

[0042] It should be noted that, in the above description, when an element is described as being "provided with" another element, it may be directly on the other element, or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal" and similar expressions used in this article are for illustrative purposes only.

[0043] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A precision machining center, comprising a tool magazine and a tool changing mechanism, wherein the tool magazine is provided with a plurality of tools (8) fixed on a tool disc (17) in a circular array, and when the tool magazine rotates to a tool changing position, the tool changing mechanism removes the tool (8) moved to the tool changing position, characterized in that: The cylindrical surface of the cutter disc (17) is dynamically sealed with a liquid distribution part (19), and a liquid distribution channel (20) is provided in the liquid distribution part (19). The liquid distribution part (19) is connected to a universal bamboo tube (9) for transporting cutting fluid to the cutting position; the cutting tool (8) is vertically plugged and installed on the end surface of the cutter disc (17), and each cutting tool (8) is correspondingly provided with a control valve for controlling the input of the corresponding cutting fluid. When a certain cutting tool (8) that moves to the tool changing position is taken out by the tool changing mechanism (27), the corresponding control valve is opened to allow the corresponding cutting fluid to flow into the liquid distribution channel (20) and then enter the universal bamboo tube (9).

2. A precision machining center according to claim 1, characterized in that: The tool (8) is socket-mounted in a socket blind hole on the tool disc (17), and an injection hole connected to the corresponding cutting fluid is opened on the side wall of the socket blind hole below the shank (1801) of the tool (8); the control valve includes a pressure spring (26), a piston (25), and a push rod (24), wherein the pressure spring (26) is vertically mounted at the bottom of the socket blind hole, and its top end is connected to the piston (25) slidably mounted in the socket blind hole, Under normal conditions, the pressure spring (26) causes the piston (25) to block the injection hole, and the top surface of the piston (25) is connected to the push rod (24), and the top end of the push rod (24) contacts and contacts the bottom end of the tool handle (1801); after the tool (8) is removed, the piston (25) is pushed up to the top of the injection hole by the pressure spring (26), so that the corresponding cutting fluid is injected from the injection hole and input into the liquid distribution channel (20) through the output hole (21).

3. A precision machining center according to claim 2, characterized in that: The knife handle (1801) is provided with an annular groove (1802) on the cylindrical surface near its bottom end, and a plurality of elastically retractable locking pins (22) are provided on the side wall near the hole opening in the socket blind hole. When the knife handle (1801) is inserted into the socket blind hole, the locking pins (22) spring into the annular groove (1802) to fix the knife handle (1801).

4. A precision machining center according to claim 3, characterized in that: A socket is radially provided on the side wall of the socket blind hole, and a locking pin (22) is connected to each socket through a cylindrical spring (23). When the knife handle (1801) is not inserted into the socket blind hole, the cylindrical spring (23) allows the spherical end of the locking pin (22) to extend into the socket blind hole and can limit the upward movement of the piston (25).

5. A precision machining center according to any one of claims 1 to 4, characterized in that: A recycling platform (2) is provided at the bottom of the processing center (1), a control panel (3) is provided on the right side of the recycling platform (2) near the front, a water inlet (4) is provided on the right side of the recycling platform (2) near the back, an electric control valve (5) is provided on the inner side of the water inlet (4), a water leakage net (6) is provided on the top of the recycling platform (2) and located inside the processing center (1), a processing platform (7) is provided on the top of the water leakage net (6), and the tool (8) is provided above the processing platform (7); a universal bamboo tube (9) is provided on the left side of the tool (8), and the water leakage net A diverter plate (10) is provided below the diverter plate (6) and located near the top of the recovery platform (2), a first filter screen (11) is provided below the diverter plate (10), a second filter screen (12) is provided below the first filter screen (11), a submersible pump (13) is provided below the first filter screen (11) and located near the right side of the bottom of the recovery platform (2), a water supply pipe (14) is provided on the top of the submersible pump (13), a water pump (15) is provided on the left side of the submersible pump (13), and a water level sensor (16) is provided on the right side of the submersible pump (13).

6. A precision machining center according to claim 5, characterized in that: The electric control valve (5) is fixed to the water inlet (4) with bolts, and the electric control valve (5) is electrically connected to the control panel (3).

7. A precision machining center according to claim 6, characterized in that: The water leakage net (6) is fixed to the recovery platform (2) by bolts, and the diverter plate (10) is fixed to the recovery platform (2) by bolts.

8. The precision machining center according to claim 6, characterized in that: The first filter screen (11) is slidably connected to the recovery platform (2), and the second filter screen (12) is slidably connected to the recovery platform (2).

9. The precision machining center according to claim 8, characterized in that: The water supply pipe (14) is sleeve-connected with the submersible pump (13), and the water supply pipe (14) is clamped with the universal bamboo tube (9).

10. The precision machining center according to claim 5, characterized in that: The water level sensor (16) is fixed to the recovery platform (2) with bolts, and the water level sensor (16) is electrically connected to the control panel (3).

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