A depth control head assembly and a ball end mill apparatus

Abstract

This invention relates to the technical field of milling, and more particularly to a depth-fixing head assembly and a vertical milling machine. The depth-fixing head assembly includes a depth-fixing head, probes, magnetic switches, and elastic elements. The depth-fixing head is used to connect to a milling motor and has a central hole in the vertical direction for mounting the milling cutter. Several depth-fixing grooves are arranged circumferentially around the central hole. The probes are slidably disposed within the depth-fixing grooves, with each probe extending out of the groove at a different horizontal height. The magnetic switches are fixed to the depth-fixing head and correspond one-to-one with each probe. The elastic elements are disposed within the depth-fixing grooves and connected to the probes, allowing the probes to selectively trigger the magnetic switches. During milling feed, probes at different heights sequentially contact the workpiece and sequentially trigger the corresponding magnetic switches, achieving multi-level real-time sensing and graded feed control of the milling depth. This effectively prevents over-milling, significantly improves depth control accuracy and machining reliability, and features a compact structure, low cost, and ease of retrofitting existing equipment.

Description

Technical Field

[0001] This invention relates to the technical field of milling, and more particularly to a depth-fixed head assembly and a vertical milling machine. Background Technology

[0002] Milling is one of the most fundamental machining methods in the field of mechanical manufacturing, and it is widely used in industries such as metal cutting, PCB board processing, and mold making. With the miniaturization and high-density development of electronic products and the continuous improvement of the machining accuracy of precision mechanical parts, increasingly higher requirements are being placed on the control accuracy of milling depth in milling. In controlled-depth milling of PCB boards, machining accuracy directly affects the assembly quality and electrical performance of subsequent electronic components; in precision parts machining, precise control of milling depth directly determines the product yield and machining quality. However, how to achieve precise and reliable control of milling depth during the milling process, especially multi-stage feed control to prevent over-milling, has always been a technical challenge in this field.

[0003] Currently, various technical solutions for controlling milling depth have emerged in existing technologies. For example, a milling cutter with axial limiting function uses a fixing ring and a limiting device on the tool holder body, and an adjusting device that works in conjunction with the limiting device to achieve axial limiting of the milling depth. Another type is a two-flute end mill with controllable milling precision, which continuously adjusts the tool extension by setting the relative sliding between the inner and outer bushings, thereby controlling the milling depth. Furthermore, an industrial robot force-controlled limiting milling mechanism uses a force-controlled actuator to control the grinding contact force and perform position compensation, and positions the workpiece by the body on both sides of the weld seam to limit the milling depth. There are also dual-guided depth-controlled milling compensation depth detection devices, which use a length gauge probe to contact the plate surface for depth detection, and a spring to improve detection stability. However, the above-mentioned existing technologies mainly use adjusting the tool extension or physical limiting mechanisms to control the milling depth, and cannot sense the contact state between the tool and the workpiece in real time during processing to perform graded feed control.

[0004] However, existing milling depth control methods that use adjusting tool extension or physical limiting mechanisms are difficult to perceive the contact state between the tool and the workpiece in real time during milling and to perform multi-level precise feed control. Summary of the Invention

[0005] The purpose of this invention is to provide a fixed depth head assembly and a vertical milling machine to solve the technical problem in the prior art that the milling depth control method using the adjustment of tool extension or physical limiting mechanism is difficult to sense the contact state between the tool and the workpiece in real time and perform multi-level precise tool feed control during the milling process.

[0006] In a first aspect, the present invention provides a depth-determining head assembly, comprising a probe, a magnetic switch, and an elastic element; A depth-fixing head is used to connect to a milling motor. The depth-fixing head has a central hole that extends vertically so that the depth-fixing head can be fitted onto a milling cutter on the milling motor. The probe has several depth grooves arranged vertically around the central hole, and the probe is arranged in a corresponding manner to each depth groove. A magnetic switch is provided, with a plurality of magnetic switches corresponding one-to-one with the probe. The magnetic switch is fixed to the depth-fixing head, and the probe is slidably disposed in the depth-fixing groove to selectively connect with the magnetic switch. An elastic element is provided, with a plurality of elastic elements corresponding to each probe. The elastic element is disposed in the fixed depth groove, and one end of the elastic element is connected to the probe so that the probe extends out of the fixed depth groove at different horizontal heights.

[0007] Furthermore, the probe includes an abutment portion and a magnetic head; The magnetic head is connected to the abutment portion, which is located at the bottom of the probe for contact with the workpiece to be milled. The abutment portion is made of a non-metallic material, and the magnetic head can be inductively connected to the magnetic switch.

[0008] Furthermore, the depth-fixing head assembly also includes an adjusting nut, the bottom of the depth-fixing groove is provided with a threaded portion, the adjusting nut is screwed into the depth-fixing groove, and the end of the elastic element away from the probe abuts against the adjusting nut.

[0009] Furthermore, the probe is provided in three parts, namely the first probe, the second probe and the third probe; the number of the fixed depth grooves is three, namely the first fixed depth groove, the second fixed depth groove and the third fixed depth groove; and the number of the magnetic switches is three, namely the first magnetic switch, the second magnetic switch and the third magnetic switch. The length of the first probe extending out of the fixed-depth groove is greater than the length of the second probe extending out of the fixed-depth groove, and the length of the second probe extending out of the fixed-depth groove is greater than the length of the third probe extending out of the fixed-depth groove.

[0010] Furthermore, the first depth groove, the second depth groove, and the third depth groove are evenly distributed in the circumferential direction of the depth-fixing head.

[0011] In a second aspect, the present invention also provides a vertical milling machine, including a spindle support, a linear bearing, a milling motor, a milling cutter, a vacuum cleaner, and a depth-fixing head assembly as described above; The linear bearing is mounted on the spindle bracket, the milling motor is fixed to the spindle bracket, the milling cutter is disposed on the output shaft of the milling motor, the vacuum cleaner is fixed to the spindle bracket and the suction port of the vacuum cleaner is oriented towards the milling cutter, and the depth-fixing head is sleeved on the milling cutter.

[0012] Furthermore, the vertical milling equipment also includes a control unit, which has a plurality of signal output terminals corresponding one-to-one with the magnetic switch, and the signal output terminals are electrically connected to the magnetic switch; The control unit further includes a first drive end and a second drive end, wherein the first drive end is used to connect to the feed component of the vertical milling machine, and the second drive end is used to connect to the alarm of the vertical milling machine; The signal output terminal is electrically connected to the first driving terminal and the second driving terminal, respectively.

[0013] Compared with the prior art, the depth-fixing head assembly provided by the present invention, by setting a depth-fixing head sleeved on the outer periphery of the milling cutter, multiple depth-fixing grooves vertically arranged around the depth-fixing head, probes slidably installed in each depth-fixing groove and extending at different horizontal heights, elastic elements and magnetic switches corresponding to each probe, enables probes at different heights to contact the workpiece in sequence and trigger the corresponding magnetic switches in sequence during the milling feed process. This achieves multi-level real-time sensing and graded feed control of milling depth, effectively prevents over-milling, significantly improves the depth control accuracy and machining reliability of milling, and has a compact overall structure, low cost, and is easy to install and modify on existing equipment. Attached Figure Description

[0014] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the overall structure of the depth-fixing head assembly provided in an embodiment of the present invention; Figure 2 This is a cross-sectional view of the overall structure of the depth-fixing head assembly provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of the overall structure of the vertical milling equipment provided in an embodiment of the present invention.

[0016] Figure label: 10. Depth-fixing head assembly; 20. Spindle support; 30. Linear bearing; 40. Milling motor; 50. Milling cutter; 100. Depth-fixing head; 110. Depth-fixing groove; 200. Probe; 210. Contact part; 220. Magnetic head; 300. Magnetic switch; 400. Elastic element; 500. Adjusting nut. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0018] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0019] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0020] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. These terms are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0021] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0022] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0023] The following detailed description of some embodiments of the present invention is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0024] Example 1 This invention provides a depth-fixing head assembly 10. Figure 1 This is a schematic diagram of the overall structure of the depth-fixing head assembly 10 provided in an embodiment of the present invention. Figure 2 This is a cross-sectional view of the overall structure of the depth-fixing head assembly 10 provided in an embodiment of the present invention. See also... Figure 1 and Figure 2 The depth-fixing head assembly 10 includes a depth-fixing head 100, a probe 200, a magnetic switch 300, and an elastic element 400.

[0025] The depth-fixing head 100 has a cylindrical structure with a central hole running vertically through its interior. This central hole allows the milling cutter 50 on the milling motor 40 to pass through, thus enabling the depth-fixing head 100 to be fitted over the milling cutter 50. The bottom end face of the depth-fixing head 100 faces the workpiece to be milled during operation.

[0026] The depth-fixing head 100 has several depth-fixing grooves 110 arranged vertically around its central hole. Each depth-fixing groove 110 is a longitudinal channel formed inside the depth-fixing head 100, and their number corresponds to the number of probes 200. Each probe 200 is slidably disposed within a depth-fixing groove 110, with each probe 200 corresponding to one depth-fixing groove 110. The probes 200 can slide vertically up and down within the depth-fixing grooves 110.

[0027] Magnetic switches 300 are fixed to the depth-fixing head 100, and the number of magnetic switches 300 corresponds one-to-one with the number of probes 200. When a probe 200 slides within the depth-fixing groove 110, it can selectively establish an inductive connection with the corresponding magnetic switch 300. Specifically, when a probe 200 slides upward to a certain height, it triggers the corresponding magnetic switch 300, thereby generating an electrical signal.

[0028] The number of elastic elements 400 corresponds one-to-one with the number of probes 200, with each elastic element 400 positioned within a corresponding depth-fixed groove 110. One end of the elastic element 400 is connected to the probe 200, and the other end is connected to or abuts against the top of the depth-fixed groove 110. The elastic element 400 is preferably a helical spring, which provides a restoring force after the probe 200 slides upward under external force, allowing it to return to its initial extended position. Through the arrangement of the elastic elements 400, each probe 200 extends from the lower end face of the depth-fixed groove 110 at a different horizontal height; that is, the length by which each probe 200 extends out of the depth-fixed groove 110 is different.

[0029] Figure 2 This is a cross-sectional view of the overall structure of the depth-fixing head assembly 10 provided in an embodiment of the present invention. See also: Figure 2 Furthermore, the probe 200 includes an abutment portion 210 and a magnetic head 220. The abutment portion 210 is disposed at the bottom of the probe 200 and is used to abut against the workpiece to be milled during the milling process. The abutment portion 210 is made of a non-metallic material to prevent scratches or damage to the workpiece surface. The magnetic head 220 is connected to the abutment portion 210; specifically, the magnetic head 220 is embedded in or fixed to the upper part of the probe 200. When the probe 200 slides upward, the magnetic head 220 rises with the probe 200 and can form an inductive connection with the magnetic switch 300. The magnetic head 220 is preferably a permanent magnet or a magnetic metal part.

[0030] Furthermore, the depth-fixing head assembly 10 also includes an adjusting nut 500. A threaded portion is provided at the bottom of the depth-fixing groove 110, and the adjusting nut 500 is screwed into the depth-fixing groove 110. The end of the elastic element 400 away from the probe 200 abuts against the adjusting nut 500. By rotating the adjusting nut 500, the axial position of the adjusting nut 500 within the depth-fixing groove 110 can be changed, thereby adjusting the preload and effective stroke of the elastic element 400, and consequently adjusting the initial length of the probe 200 extending out of the depth-fixing groove 110 and the sliding stroke of the probe 200.

[0031] In this embodiment, three probes 200 are provided, namely a first probe, a second probe, and a third probe. Correspondingly, there are three depth grooves 110, namely a first depth groove, a second depth groove, and a third depth groove. There are three magnetic switches 300, namely a first magnetic switch, a second magnetic switch, and a third magnetic switch. The length of the first probe extending out of the first depth groove is greater than the length of the second probe extending out of the second depth groove, and the length of the second probe extending out of the second depth groove is greater than the length of the third probe extending out of the third depth groove. That is, the lower end faces of the three probes are distributed in a stepped manner in the vertical direction, with the lower end face of the first probe (longest) being the lowest, the lower end face of the third probe (shortest) being the highest, and the lower end face of the second probe being in between. Preferably, the first depth groove, the second depth groove, and the third depth groove are evenly distributed in the circumferential direction of the depth head 100, that is, the included angle between two adjacent depth grooves is 120 degrees, so as to ensure that the depth head 100 is subjected to uniform force during the milling process.

[0032] The following is combined with Figure 1 and Figure 2 The working process of the depth-fixing head assembly 10 provided in this embodiment is described in detail.

[0033] In the initial state, the depth-fixing head assembly 10 is mounted on the milling motor 40, and the depth-fixing head 100 is sleeved on the outside of the milling cutter 50. The initial position of the cutting edge of the milling cutter 50 is higher than the lower end face of each probe 200. The depth-fixing head assembly 10 is fed downward together with the milling motor 40.

[0034] When the depth-fixing head assembly 10 descends to the first position, the lower end face of the first probe (the longest) first contacts the workpiece surface. As the depth-fixing head assembly 10 continues to descend, the first probe is pushed upward by the workpiece, overcoming the elastic force of the elastic element 400 and sliding upward along the first depth-fixing groove. The magnetic head 220 at the top of the first probe rises accordingly. When the magnetic head 220 reaches the sensing area of ​​the first magnetic switch, the first magnetic switch is triggered, generating a first signal.

[0035] As the depth-fixing head assembly 10 continues to descend to the second position, the lower end face of the second probe (secondary length) contacts the workpiece surface. The second probe also slides upwards, and its magnetic head 220 triggers the second magnetic switch, generating a second signal. At this time, both the first and second signals exist simultaneously.

[0036] If an abnormality occurs during the machining process, such as an uneven workpiece surface or excessive feed rate, resulting in only the second signal being present while the first signal is lost, it indicates an abnormal milling depth. In this case, an alarm can be triggered and the tool can be retracted.

[0037] As the depth-fixing head assembly 10 continues to descend to the third position, the lower end face of the third probe (shortest) contacts the workpiece surface. The third probe slides upward, and its magnetic head 220 triggers the third magnetic switch, generating a third signal. At this time, the first, second, and third signals are present simultaneously, indicating that the maximum permissible milling depth has been reached. The depth-fixing head assembly 10 and the milling motor 40 should immediately stop feeding and begin retraction.

[0038] In addition, the adjusting nut 500 also provides a mechanical limit function. When the electrical signal (magnetic switch signal) is lost due to a fault, when the probe 200 slides upward to the limit position, the upper end face of its magnetic head 220 will abut against the lower end face of the adjusting nut 500, thereby preventing the probe 200 from sliding upward and thus preventing the depth-fixing head assembly 10 from continuing to descend, achieving mechanical limit and effectively preventing over-milling.

[0039] Example 2 The present invention also provides a vertical milling device, Figure 3 This is a schematic diagram of the overall structure of the vertical milling equipment provided in an embodiment of the present invention. See also: Figure 3 The vertical milling equipment includes a spindle support 20, a linear bearing 30, a milling motor 40, a milling cutter 50, a vacuum cleaner, and a depth-fixing head assembly 10 of any one of the above embodiments.

[0040] A linear bearing 30 is mounted on the spindle support 20 to guide and move the spindle support 20 in the vertical direction. A milling motor 40 is fixed to the spindle support 20 via a motor mounting bracket and moves up and down with the spindle support 20. A milling cutter 50 is mounted on the output shaft of the milling motor 40 and is driven to rotate by the milling motor 40. A vacuum cleaner is fixed to the spindle support 20 via a vacuum cleaner mounting bracket, with its suction port facing the milling cutter 50, to suck up flying chips and dust generated during milling. A depth-fixing head assembly 10 is fixed to the housing of the milling motor 40 via its motor connector 600, and the depth-fixing head 100 is fitted over the milling cutter 50, with the lower ends of each probe 200 within the depth-fixing head 100 lower than the initial position of the cutting edge of the milling cutter 50.

[0041] Furthermore, the vertical milling machine also includes a control unit (not shown in the figure). The control unit is specifically configured as a control circuit board, which has several signal output terminals corresponding one-to-one with the magnetic switches 300. Each signal output terminal is electrically connected to the output terminal of its corresponding magnetic switch 300. The control circuit board also has a first drive terminal and a second drive terminal. The first drive terminal is electrically connected to the feed component of the vertical milling machine (e.g., a feed motor or cylinder that drives the spindle support 20 to move up and down), and the second drive terminal is electrically connected to the alarm of the vertical milling machine. Signal traces on the control circuit board electrically connect each signal output terminal to the first drive terminal and the second drive terminal, respectively. When different signal output terminals receive a combination of signals from the magnetic switches 300, the control circuit board controls the first drive terminal to output a corresponding feed control signal and controls the second drive terminal to output an alarm signal through its internal preset circuit connections (e.g., through logic gate circuits or relay combinations).

[0042] The working process of the vertical milling equipment provided in this embodiment is described in detail below.

[0043] In the initial state, the milling cutter 50 is positioned above the workpiece, and the milling motor 40 drives the milling cutter 50 to rotate. The spindle support 20 carries the milling motor 40 and the depth-fixing head assembly 10 downward along the linear bearing 30.

[0044] When the spindle support 20 descends to the first position, the first probe of the depth-fixing head assembly 10 contacts the workpiece, and the first magnetic switch is triggered. This first signal is transmitted to the first drive end through the first signal input terminal of the control circuit board, controlling the feed component to continue feeding at a first feed depth (e.g., 0.5 mm).

[0045] As the spindle support 20 continues to descend to the second position, the second probe contacts the workpiece, triggering the second magnetic switch. With both the first and second signals present, the control circuit board controls the feed mechanism to continue feeding at a second feed depth (e.g., 0.1 mm, i.e., a smaller feed amount).

[0046] If an abnormal situation occurs, such as only the second signal exists while the first signal is lost, the control circuit board triggers an alarm through the second drive terminal, and at the same time controls the feed component to perform tool retraction through the first drive terminal.

[0047] When the spindle support 20 continues to descend to the third position, the third probe contacts the workpiece, and the third magnetic switch is triggered. With the first, second, and third signals present simultaneously, the control circuit board controls the feed mechanism to stop the feed and immediately retract the tool.

[0048] Meanwhile, the vacuum cleaner works continuously during the milling process, sucking in the flying debris generated during milling and keeping the processing area clean.

[0049] In summary, the depth-fixing head assembly 10 of the present invention achieves multi-level real-time sensing of milling depth by setting multiple probes 200 with different extension lengths, as well as corresponding magnetic switches 300 and elastic elements 400; the precise adjustment and mechanical limit of the probe stroke are achieved by adjusting the nut 500. The vertical milling equipment of the present invention, using the aforementioned depth-fixing head assembly 10 and combined with a control circuit board, achieves multi-level precise feed control and abnormal alarm, significantly improving the depth control accuracy and machining reliability of milling, effectively preventing over-milling, and featuring a compact overall structure, low cost, and ease of retrofitting into existing equipment.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A depth-fixing head assembly, characterized in that, include: A depth-fixing head is used to connect to a milling motor. The depth-fixing head has a central hole that extends vertically so that the depth-fixing head can be fitted onto a milling cutter on the milling motor. The probe has several depth grooves arranged vertically around the central hole, and the probe is arranged in a corresponding manner to each depth groove. A magnetic switch is provided, with a plurality of magnetic switches corresponding one-to-one with the probe. The magnetic switch is fixed to the depth-fixing head, and the probe is slidably disposed in the depth-fixing groove to selectively connect with the magnetic switch. An elastic element is provided, with a plurality of elastic elements corresponding to each probe. The elastic element is disposed in the fixed depth groove, and one end of the elastic element is connected to the probe so that the probe extends out of the fixed depth groove at different horizontal heights.

2. The depth-fixing head assembly according to claim 1, characterized in that, The probe includes an abutment part and a magnetic head; The magnetic head is connected to the abutment portion, which is located at the bottom of the probe for contact with the workpiece to be milled. The abutment portion is made of a non-metallic material, and the magnetic head can be inductively connected to the magnetic switch.

3. The depth-fixing head assembly according to claim 1, characterized in that, The depth-fixing head assembly also includes an adjusting nut. The bottom of the depth-fixing groove is provided with a threaded portion. The adjusting nut is screwed into the depth-fixing groove, and the end of the elastic element away from the probe abuts against the adjusting nut.

4. The depth-fixing head assembly according to any one of claims 1-3, characterized in that, The probe is provided in three parts, namely the first probe, the second probe and the third probe; the number of the fixed depth groove is three parts, namely the first fixed depth groove, the second fixed depth groove and the third fixed depth groove; and the number of the magnetic switch is three parts, namely the first magnetic switch, the second magnetic switch and the third magnetic switch. The length of the first probe extending out of the fixed-depth groove is greater than the length of the second probe extending out of the fixed-depth groove, and the length of the second probe extending out of the fixed-depth groove is greater than the length of the third probe extending out of the fixed-depth groove.

5. The depth-fixing head assembly according to claim 4, characterized in that, The first, second, and third depth grooves are evenly distributed in the circumferential direction of the depth-fixing head.

6. A vertical milling machine, characterized in that, Includes a spindle support, linear bearing, milling motor, milling cutter, vacuum cleaner, and a depth-fixing head assembly as described in any one of claims 1-5; The linear bearing is mounted on the spindle bracket, the milling motor is fixed to the spindle bracket, the milling cutter is disposed on the output shaft of the milling motor, the vacuum cleaner is fixed to the spindle bracket and the suction port of the vacuum cleaner is oriented towards the milling cutter, and the depth-fixing head is sleeved on the milling cutter.

7. The vertical milling equipment according to claim 6, characterized in that, The vertical milling equipment also includes a control unit, which has a plurality of signal output terminals corresponding one-to-one with the magnetic switch, and the signal output terminals are electrically connected to the magnetic switch. The control unit further includes a first drive end and a second drive end, wherein the first drive end is used to connect to the feed component of the vertical milling machine, and the second drive end is used to connect to the alarm of the vertical milling machine; The signal output terminal is electrically connected to the first driving terminal and the second driving terminal, respectively.

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