Numerical control machine tool for milling

Abstract

The application relates to the technical field of milling machine equipment, and discloses a numerical control machine tool for milling machining, which comprises a main shaft, the bottom end of the main shaft is connected with a conical body, a face milling cutter is fixedly installed at the bottom end of the conical body, the bottom end of the face milling cutter is provided with a pull rod extending to the top of the main shaft, the top of the outer surface of the pull rod is provided with a nut in contact with the top end of the main shaft, the inside of the pull rod is slidably sleeved with a transmission rod, and the bottom end of the transmission rod is provided with a vertical milling cutter. The numerical control machine tool for milling machining is provided with the transmission rod and a linkage mechanism connected with the transmission rod, a corresponding magnetic field is generated by electrifying the first electromagnetic coil or the second electromagnetic coil to drive the transmission rod to move upwards or downwards, and the transmission rod is forced to be in a high position or a low position state, so that when plane milling and groove milling are simultaneously needed for a same workpiece, the milling cutter does not need to be replaced or the workpiece does not need to be processed in steps, and the time consumed for clamping the cutter or the workpiece is effectively avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of milling machine equipment, and particularly relates to a numerical control machine tool for milling. BACKGROUND

[0002] Milling is a processing technology of cutting workpiece surface by using high-speed rotating multi-blade cutter, and according to different cutters, planes, grooves and various profile surfaces, special curved surfaces can be machined. Compared with other cutting processes, the milling process has better adaptability, higher efficiency and higher precision, and is widely used in the field of mechanical processing.

[0003] In the process of milling workpieces, different milling cutters are often needed for milling of planes and grooves, and the milling of workpieces is not only milling of planes or grooves, but also milling of grooves after milling of the workpiece surface, which leads to stopping and replacing the milling cutter or step-by-step processing when milling such workpieces, and either way requires a lot of time for clamping the cutter or the workpiece, greatly reducing the milling efficiency, stability and reliability of such workpieces.

[0004] Therefore, there is an urgent need for a machine tool structure for milling to solve the above-mentioned defects of the existing milling machine when milling planes and grooves at the same time. SUMMARY

[0005] The present application provides a numerical control machine tool for milling, which can simultaneously mill planes and grooves on workpieces without replacing milling cutters or step-by-step processing, has high milling efficiency for such workpieces, and solves the problem that the workpiece surface needs to be milled after milling is completed, which leads to stopping and replacing the milling cutter or step-by-step processing when milling such workpieces, and either way requires a lot of time for clamping the cutter or the workpiece.

[0006] In order to achieve the above object, the technical scheme adopted by the present application is as follows: A numerical control machine tool for milling processing, comprising a milling machine main body, a power system is arranged in the milling machine main body, and a main shaft is drivingly connected in the power system, and then under the driving of the power system, the main shaft can move or feed according to the set track to perform milling operation on the workpiece, a conical body is connected to the bottom end of the main shaft, and a face milling cutter for milling a plane is fixedly installed at the bottom end of the conical body, the bottom end of the face milling cutter is provided with a pull rod extending to the top of the main shaft, and the top of the outer surface of the pull rod is provided with a nut in contact with the top end of the main shaft, and then the face milling cutter and the conical body thereon can be tightened by rotating the nut, and the face milling cutter is stably drivingly connected to the main shaft, and when the main shaft rotates at high speed, the face milling cutter rotates at high speed to perform milling operation on the plane of the workpiece, a transmission rod is slidingly sleeved in the pull rod, and a vertical milling cutter for milling a groove is arranged at the bottom end of the transmission rod, a plurality of groups of through grooves arranged in annular array are arranged on the middle part of the outer surface of the pull rod, and a plurality of groups of permanent magnets penetrating through the through grooves of the pull rod are fixedly installed on the outer surface of the transmission rod, the outer surface of the permanent magnet is in contact with the inner wall of the first electromagnetic coil fixedly installed on the main shaft, and the second electromagnetic coil is arranged below the first electromagnetic coil in the main shaft, and under the action of the first electromagnetic coil and the second electromagnetic coil, the transmission rod can be driven to move upward or downward by conducting electricity to the first electromagnetic coil or the second electromagnetic coil to generate a corresponding magnetic field, and the transmission rod is forced to be in a high position or a low position state, and then the vertical milling cutter fixedly installed at the bottom end of the transmission rod is controlled to be in a retracted or extended state.

[0007] Further, the magnetic poles between the upper and lower of the permanent magnet are opposite to the magnetic poles between the upper and lower of the first electromagnetic coil or the second electromagnetic coil when conducting electricity, and then it is ensured that the permanent magnet can move upward or downward to the position flush with the first electromagnetic coil or the second electromagnetic coil under the action of magnetic attraction when the first electromagnetic coil or the second electromagnetic coil is conducting electricity.

[0008] Further, when the face milling cutter needs to perform milling operation, the first electromagnetic coil is conducting electricity to generate a corresponding strength magnetic field, the transmission rod is forced to move upward against the influence of gravity, and the transmission rod is kept in a high position state, and then the vertical milling cutter fixedly installed at the bottom end of the transmission rod is forced to be in a retracted state.

[0009] Further, when the transmission rod is in a high position state, the bottom end of the vertical milling cutter is higher than the bottom end of the face milling cutter, and then the contact between the vertical milling cutter and the workpiece is effectively prevented when the face milling cutter performs plane milling operation.

[0010] Further, when the end mill needs to perform milling operation, the second electromagnetic coil is powered on to generate a magnetic field of corresponding intensity, so that the transmission rod is forced to move downward under the action of magnetic attraction, and the transmission rod is kept in a low position, and the end mill fixedly installed at the bottom end of the transmission rod is in an extended state to perform groove milling operation.

[0011] Further, the top of the outer surface of the transmission rod movably clamps three groups of clamping columns arranged in annular array, and the middle of the outer surface of the transmission rod is provided with clamping grooves extending into the interior of the main shaft and matched with the clamping columns, so that when the transmission rod is in a low position, the three groups of clamping columns are forced to move outward and enter the clamping grooves under the action of centrifugal force generated by high-speed rotation, to lock the transmission rod and the pull rod, preventing the transmission rod and the pull rod from relatively sliding during the end mill mills the groove.

[0012] Further, the interior of the main shaft is provided with a limiting disc corresponding to the position of the clamping groove, the interior of the limiting disc is provided with a linkage groove, the interior of the clamping groove is provided with a top bead with an outer surface in contact with the inner wall of the linkage groove, and the outer periphery of the limiting disc is provided with a driving coil fixedly installed on the main shaft, so that the limiting disc can be rotated to extrude the top bead and force the top bead to move inward to extrude the clamping column, so that the clamping column is retracted into the interior of the transmission rod to release the locking action between the pull rod and the transmission rod.

[0013] Further, the first electromagnetic coil, the second electromagnetic coil and the driving coil are electrically connected in feedback, when the first electromagnetic coil is powered on, the driving coil is triggered and rotates to extrude the top bead inward through the linkage groove, so as to release the locking action between the pull rod and the transmission rod, and when the second electromagnetic coil is powered on, the driving coil is reversely triggered and drives the limiting disc to return to the initial state, and the top bead is not extruded inward, so that the clamping column can lock the pull rod and the transmission rod under the action of centrifugal force.

[0014] The application has the following advantages:

[0015] The numerical control machine tool for milling provided in the application can drive the transmission rod to move upward or downward by powering on the first electromagnetic coil or the second electromagnetic coil to generate a corresponding magnetic field, and force the transmission rod to be in a high position or a low position, so as to control whether the end mill fixedly installed at the bottom end of the transmission rod is in a retracted state or an extended state, thereby avoiding the need to replace the milling cutter or process step by step when the same workpiece needs to be simultaneously subjected to plane and groove milling, effectively avoiding the time consumed for clamping the cutter or the workpiece, and greatly improving the milling efficiency for such workpieces. BRIEF DESCRIPTION OF DRAWINGS

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort:

[0017] Figure 1 This is a view of the main structure of the present invention;

[0018] Figure 2 This is a schematic diagram of the main shaft of the present invention;

[0019] Figure 3 This is a front view of the main shaft structure of the present invention;

[0020] Figure 4 The structure of this invention Figure 3 Sectional view at point AA;

[0021] Figure 5 This is a side view of the main shaft structure of the present invention;

[0022] Figure 6 The structure of this invention Figure 5 Sectional view at point BB;

[0023] Figure 7 The structure of this invention Figure 2 Enlarged diagram of point C in the image.

[0024] In the diagram: 1-spindle, 2-conical body, 3-face milling cutter, 4-connector rod, 5-transmission rod, 6-end milling cutter, 7-permanent magnet block, 8-first electromagnetic coil, 9-second electromagnetic coil, 10-limiting plate, 11-linkage groove, 12-top ball, 13-drive coil, 14-clamping post; 15-milling machine body; 16-power system. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] like Figure 1 , Figure 2As shown, a kind of milling with numerical control machine tool, including milling machine main body 15, the inside of milling machine main body 15 is equipped with power system 16, and the transmission connection of power system 16 is driven in its inside main shaft 1, further under the drive of power system 16, can drive main shaft 1 according to the track set movement or feed to carry out milling operation to workpiece, the bottom end of main shaft 1 is clamped with cone body 2, and the bottom end of cone body 2 is fixedly installed with the face milling cutter 3 for milling plane, the bottom end of face milling cutter 3 is equipped with the pull rod 4 extending to the top of main shaft 1, and the top of the outer surface of pull rod 4 is equipped with the nut with the top end of main shaft 1 contact, further can be pulled tight by rotating nut face milling cutter 3 and its cone body 2, and face milling cutter 3 is stably transmission connection on main shaft 1, when high-speed rotation of main shaft 1 drives face milling cutter 3 to carry out high-speed rotating action with it to carry out milling action to the plane of workpiece, the inside of pull rod 4 is slidably sleeved with transmission rod 5, and the bottom end of transmission rod 5 is equipped with vertical milling cutter 6 for milling groove, the middle part of the outer surface of pull rod 4 is equipped with a plurality of groups of annular array arrangement through groove, and a plurality of groups of permanent magnet block 7 are fixedly installed on the outer surface of transmission rod 5 through the through groove of pull rod 4, the outer surface of permanent magnet block 7 is in contact with the inner wall of first electromagnetic coil 8 fixedly installed on main shaft 1, and the second electromagnetic coil 9 is arranged in the inside of main shaft 1 and is located below first electromagnetic coil 8, under the action of first electromagnetic coil 8 and second electromagnetic coil 9, by the first electromagnetic coil 8 or second electromagnetic coil 9 of electric conduction, corresponding magnetic field is generated to drive transmission rod 5 to move upwards or downwards, and transmission rod 5 is forced to be in high position or low position state, further controls vertical milling cutter 6 fixedly installed at the bottom of transmission rod 5 to be in retracted or extended state.

[0027] In the technical solution, the magnetic poles between the upper and lower of permanent magnet block 7 are opposite to the magnetic poles between the upper and lower of first electromagnetic coil 8 or second electromagnetic coil 9 when electrically connected, further ensure that first electromagnetic coil 8 or second electromagnetic coil 9 can move upwards or downwards to the position flush with first electromagnetic coil 8 or second electromagnetic coil 9 under the action of magnetic attraction when electrically connected.

[0028] In the technical solution, when face milling cutter 3 needs to carry out milling operation, first electromagnetic coil 8 is electrically connected and makes it generate corresponding intensity magnetic field, forces transmission rod 5 to move upwards against the influence of gravity, and makes transmission rod 5 keep in high position state, further forces vertical milling cutter 6 fixedly installed at the bottom of transmission rod 5 to be in retracted state.

[0029] In the technical solution, when transmission rod 5 is in high position state, the bottom end of vertical milling cutter 6 is higher than the bottom end of face milling cutter 3, further effectively prevent face milling cutter 3 from contacting with workpiece when carrying out plane milling operation.

[0030] When the end mill 6 needs to perform milling operation, the second electromagnetic coil 9 is connected to electricity to generate a magnetic field with corresponding intensity, which forces the transmission rod 5 to move downward under the action of magnetic attraction, and makes the transmission rod 5 keep in the low position, and further makes the end mill 6 fixedly installed at the bottom end of the transmission rod 5 keep in the extended state to perform groove milling operation.

[0031] As shown in Figure 5 , Figure 6 In the technical solution, the top of the outer surface of the transmission rod 5 movably clamps three groups of clamping columns 14 arranged in annular array, and the middle of the outer surface of the transmission rod 5 is provided with clamping grooves extending into the main shaft 1 and matched with the clamping columns 14, and further, when the transmission rod 5 is in the low position, the three groups of clamping columns 14 are forced to move outward and enter the clamping grooves under the action of centrifugal force generated by high-speed rotation of the transmission rod 5 to lock the transmission rod 5 and the pull rod 4, and prevent the relative sliding phenomenon between the transmission rod 5 and the pull rod 4 during the milling of the end mill 6.

[0032] As shown in Figure 3 , Figure 4 and Figure 7 In the technical solution, the inside of the main shaft 1 is provided with a limiting disc 10 corresponding to the position of the clamping groove, and the inside of the limiting disc 10 is provided with a linkage groove 11, and the inside of the clamping groove is provided with a top bead 12 with the outer surface in contact with the inner wall of the linkage groove 11, and further, the outer periphery of the limiting disc 10 is provided with a driving coil 13 fixedly installed on the main shaft 1, and further, the top bead 12 can be extruded by rotating the limiting disc 10, and the top bead 12 is forced to move inward to extrude the clamping column 14, so that the clamping column 14 is retracted into the inside of the transmission rod 5 to release the locking action between the pull rod 4 and the transmission rod 5.

[0033] As shown in Figure 2 , Figure 7 In the technical solution, the first electromagnetic coil 8, the second electromagnetic coil 9 and the driving coil 13 are electrically connected in feedback, and when the first electromagnetic coil 8 is connected to electricity, the driving coil 13 is triggered to rotate to extrude the top bead 12 inward through the linkage groove 11, so as to release the locking action between the pull rod 4 and the transmission rod 5, and when the second electromagnetic coil 9 is connected to electricity, the driving coil 13 is reversely triggered to drive the limiting disc 10 to return to the initial state, and the top bead 12 is not extruded inward, so that the clamping column 14 can lock the pull rod 4 and the transmission rod 5 under the action of centrifugal force.

[0034] The foregoing description of the disclosed embodiments enables a person skilled in the art to make or use the application. Modifications of these embodiments will occur to persons of skill in the art, and that the appended claims are intended to cover all such modifications that do not depart from the true spirit and scope of the application. Therefore, the application is not limited to the embodiments shown but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A CNC machine tool for milling, comprising a milling machine body (15), wherein a power system (16) is provided inside the milling machine body (15), and a spindle (1) is connected to the power system (16) for transmission. A tapered body (2) is engaged at the bottom end of the spindle (1), and a face milling cutter (3) is fixedly installed at the bottom end of the tapered body (2). A pull rod (4) extending to the top of the spindle (1) is provided at the bottom end of the face milling cutter (3), and a nut whose bottom end contacts the top end of the spindle (1) is provided at the top of the outer surface of the pull rod (4). The machine tool is characterized in that: The pull rod (4) is slidably sleeved with a transmission rod (5), and the bottom end of the transmission rod (5) is provided with a milling cutter (6). The middle part of the outer surface of the pull rod (4) is provided with a through groove, and a permanent magnet block (7) passing through the through groove of the pull rod (4) is fixedly installed on the outer surface of the transmission rod (5). The outer surface of the permanent magnet block (7) is in contact with the inner wall of the first electromagnetic coil (8) fixedly installed on the spindle (1). A second electromagnetic coil (9) is provided inside the spindle (1) and directly below the first electromagnetic coil (8). The magnetic poles between the upper and lower parts of the permanent magnet block (7) are opposite to the magnetic poles between the upper and lower parts when the first electromagnetic coil (8) or the second electromagnetic coil (9) is energized and conducting. When the end mill (6) is required to perform milling operations, the second electromagnetic coil (9) is energized to generate a magnetic field of corresponding strength, which forces the transmission rod (5) to move downward under the action of magnetic attraction, and keeps the transmission rod (5) in a low position. The top of the outer surface of the transmission rod (5) is movably engaged with a locking pin (14), and a slot is provided in the middle of the outer surface of the transmission rod (5) to cooperate with the locking pin (14) and extend into the interior of the main shaft (1). When the transmission rod (5) is in a low position, under the action of the centrifugal force generated by its high-speed rotation, the locking pin (14) is forced to move outward and enter the slot to lock the transmission rod (5) and the pull rod (4). The main shaft (1) is provided with a limiting plate (10) corresponding to the position of the slot, and a linkage groove (11) is provided inside the limiting plate (10). The slot is provided with a top ball (12) whose outer surface contacts the inner wall of the linkage groove (11). At the same time, a drive coil (13) is fixedly installed on the main shaft (1) on the periphery of the limiting plate (10). By rotating the limiting plate (10), the top ball (12) is squeezed and forced to move inward to squeeze the locking post (14), causing the locking post (14) to retract into the transmission rod (5) to release the locking action between the pull rod (4) and the transmission rod (5).

2. The CNC machine tool for milling according to claim 1, characterized in that, When the face milling cutter (3) is required to perform milling operations, the first electromagnetic coil (8) is energized and generates a magnetic field of corresponding strength, forcing the transmission rod (5) to overcome the influence of gravity and move upward, so that the transmission rod (5) is kept in a high position.

3. The CNC machine tool for milling according to claim 2, characterized in that, When the transmission rod (5) is in a high position, the bottom end of the end mill (6) is higher than the bottom end of the face mill (3).

4. The CNC machine tool for milling according to claim 1, characterized in that, An electrical feedback connection is formed between the first electromagnetic coil (8), the second electromagnetic coil (9) and the drive coil (13). When the first electromagnetic coil (8) is energized, the drive coil (13) is energized and rotates to squeeze the top ball (12) inward through the linkage groove (11). When the second electromagnetic coil (9) is energized, the drive coil (13) is energized in the opposite direction and drives the limit plate (10) back to its initial state, without squeezing the top ball (12) inward.

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