Rotatable milling machine

Abstract

The utility model provides a rotatable milling machine, include: base, bed body, rotatable set up on the base, milling processing subassembly, it includes the base and places the drill milling head on the base, the base sets up on the bed body, and can rotate along with the bed body, the drill milling head can rotate relative to the base and realize milling processing, wherein, the drill milling head can lift relative to the bed body to adjust the height of drill milling head, the base can move along the length direction of the bed body and adjust the processing radius of the base rotation along with the bed body. This rotatable milling machine can satisfy the milling processing demand of different size annular structure plane after once positioning installation, solved the problem of multiple positioning installation, multiple adjustment, multiple milling, improved the processing efficiency greatly, guaranteed the machining accuracy.

Description

Technical Field

[0001] This utility model relates to the field of processing equipment technology, and in particular to a rotatable milling machine. Background Technology

[0002] Ships and marine engineering equipment often have large, ring-shaped steel structure mounting bases. According to equipment installation requirements, the base surface must meet high flatness and roughness standards. Due to significant deformation after welding and the resulting rough steel plate surface, the base surface needs to be machined and milled to achieve the required flatness for equipment installation. For large bases, traditional fixed vertical or horizontal milling machines are insufficient. Using mobile machining equipment requires multiple positioning, adjustments, and milling operations, making the entire process time-consuming, labor-intensive, and inefficient. Utility Model Content

[0003] The purpose of this invention is to provide a rotatable milling machine to solve the problems of the prior art.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a rotatable milling machine, comprising: Base; The bed is rotatably mounted on the base; A milling assembly includes a base and a milling head mounted on the base. The base is disposed on a bed and can rotate with the bed. The milling head can rotate relative to the base to perform milling operations. The drilling and milling head can be raised and lowered relative to the bed to adjust the height of the drilling and milling head, and the machine base can be moved along the length of the bed to adjust the machining radius of the machine base as the bed rotates.

[0005] In one embodiment, the rotatable milling machine includes a moving mechanism, the moving mechanism comprising: A rack, which is disposed on the bed and moves along the length of the bed; A gear, which is mounted on the base and meshes with the rack; A movable drive component is connected to the gear and drives the gear to rotate.

[0006] In one embodiment, the moving mechanism further includes: A slide rail is provided on the bed and moves along the length of the bed; A slider is disposed on the base and slides in cooperation with the slide rail.

[0007] In one embodiment, the machine base includes an outer sleeve and an inner sleeve that are hollow inside and nested together, and a transition plate connected to the bed. The outer sleeve is fixedly connected to the transition plate, the inner sleeve is movable up and down relative to the outer sleeve, and the drill bit is connected to the inner sleeve and can move up and down with the inner sleeve.

[0008] In one embodiment, the inner sleeve is raised and lowered via a lifting mechanism, the lifting mechanism comprising: The first connecting plate is sleeved on the outer periphery of the outer sleeve and connected and fixed to the outer sleeve; The second sleeve plate is fitted around the outer periphery of the inner sleeve and is connected and fixed to the inner sleeve; the second sleeve plate is located below the first sleeve plate; A lead screw passes through the first socket plate and the second socket plate, and is screwed to the first socket plate and the second socket plate.

[0009] In one embodiment, a handwheel is provided at the top of the lead screw, and the handwheel is coaxial with the lead screw; The lifting mechanism further includes a guide groove and a positioning rod. The guide groove is disposed on the outer periphery of the inner sleeve and extends along the axial direction of the inner sleeve. The positioning rod is screwed to the outer sleeve and can approach the guide groove to abut against the inner sleeve or disengage from the inner sleeve so that the positioning rod can move up and down along the guide groove.

[0010] In one embodiment, the bed is rotatably connected to the base via a rotating mechanism, the rotating mechanism comprising: A rotating plate, which is connected and fixed to the bed; A power component, which is connected to the rotating plate and drives the rotating plate to rotate; The base includes a base plate, a cylinder disposed on the base plate, and a top plate disposed on the cylinder. A through hole is provided in the middle of the top plate, and the rotating plate extends upward through the through hole to the top plate. The power component is disposed inside the cylinder.

[0011] In one embodiment, the bed is hollow inside, and the side of the bed is provided with an adjustment hole extending along its own length. The bed is rotatably connected to the base through a rotating mechanism, and the bed and the rotating plate of the rotating mechanism are connected by a clamping member. The clamping component includes a first connecting plate, a second connecting plate perpendicular to the first connecting plate, a connecting rod, and a clamping nut. The first connecting plate is connected to the top of the rotating plate, the second connecting plate is attached to the side of the bed, the connecting rod is connected to the second connecting plate and extends into the adjustment hole, and the clamping nut is screwed to the connecting rod and together with the second connecting plate clamps the bed.

[0012] In one embodiment, the length of the adjustment hole is less than the length of the bed; The top of the bed has multiple operating holes, which are spaced apart along the length of the bed.

[0013] In one embodiment, the milling assembly includes a spindle and a rotary drive for driving the spindle to rotate, the top of the spindle being fixedly connected to the milling head, and the bottom of the spindle being connected to the rotary drive.

[0014] As can be seen from the above technical solution, this utility model has at least the following advantages and positive effects: The milling head of this rotatable milling machine can be raised and lowered relative to the bed to adjust the height of the milling head. The machine base can move along the length of the bed to adjust the machining radius of the machine base as it rotates with the bed. This allows it to meet the milling needs of annular structural planes of different sizes after a single positioning and installation. It solves the problems of multiple positioning and installation, multiple adjustments, and multiple milling operations, greatly improving processing efficiency and ensuring processing accuracy.

[0015] This rotatable milling machine is easy to disassemble and assemble, and can be widely used for processing equipment mounting bases on large-size, ring-shaped steel structures on ships and marine engineering equipment. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the rotatable milling machine in this utility model.

[0017] Figure 2 yes Figure 1 A structural diagram from another perspective.

[0018] Figure 3 This is a partial structural schematic diagram of the rotatable milling machine in this utility model.

[0019] Figure 4 This is a side view schematic diagram of the rotatable milling machine part of the present invention.

[0020] The annotations in the attached figures are explained as follows: 1. Rotary milling machine; 11. Base; 111. Base plate; 112. Cylinder; 113. Top plate; 114. Reinforcing rib; 115. Cover plate; 12. Bed; 121. Adjustment hole; 122. Operating hole; 13. Rotary plate; 14. Clamping component; 141. First connecting plate; 142. Second connecting plate; 143. Connecting rod; 15. Milling assembly; 151. Outer sleeve; 152. Inner sleeve; 153. Transition plate; 1531. Connecting hole; 154. Drilling head; 155. Spindle; 156. Rotary drive component; 161. First socket plate; 162. Second socket plate; 163. Lead screw; 164. Handwheel; 165. Guide groove; 166. Positioning rod; 171. Rack; 172. Gear; 173. Moving drive component; 174. Slide rail; 175. Slider. Detailed Implementation

[0021] Although the present invention can be readily embodied in various forms, only some specific embodiments are shown in the accompanying drawings and will be described in detail in this specification. It is understood that this specification should be regarded as an exemplary illustration of the principles of the present invention and is not intended to limit the present invention to what is described herein.

[0022] Therefore, a feature pointed out in this specification is used to describe one feature of one embodiment of the present invention, and does not imply that every embodiment of the present invention must have the described feature. Furthermore, it should be noted that this specification describes many features. Although certain features may be combined to illustrate possible system designs, these features may also be used in other combinations not explicitly stated. Therefore, unless otherwise stated, the described combinations are not intended to be limiting.

[0023] In the embodiments shown in the accompanying drawings, the directional indications (such as up, down, left, right, front, and back) used to explain the structure and movement of the various elements of this invention are relative rather than absolute. These descriptions are appropriate when these elements are in the positions shown in the drawings. If the descriptions of the positions of these elements change, these directional indications also change accordingly.

[0024] This application provides a rotatable milling machine that can rotate and complete the machining of the annular surface of the base in one operation without the need for overall displacement and adjustment.

[0025] Combination Figure 1 and Figure 2The rotatable milling machine 1 includes a base 11, a bed 12, and a milling assembly 15. The bed 12 is rotatably mounted on the base 11. The milling assembly 15 includes a machine base and a milling head 154 mounted on the machine base. The machine base is mounted on the bed 12 and can rotate with the bed 12. The milling head 154 can rotate relative to the machine base to perform milling operations. The milling head 154 can be raised and lowered relative to the bed 12 to adjust its height, and the machine base can move along the length of the bed 12 to adjust its machining radius as the bed 12 rotates.

[0026] The rotary milling machine 1 uses the rotation of the bed 12 to drive the milling head 154 to perform machining operations, achieving the machining of the annular surface of the base in one operation without the need for overall displacement and adjustment. The milling head 154 can be raised and lowered relative to the base 11, and the machining radius can be adjusted by moving the milling head 154 along the length of the bed 12, thus enabling the rotary milling machine 1 to adapt to different equipment base plane machining requirements.

[0027] The base 11 includes a base plate 111, a cylindrical body 112 disposed on the base plate 111, and a top plate 113 disposed on the cylindrical body 112. The base plate 111 is circular to seal the opening at the bottom of the cylindrical body 112. The base plate 111 and the cylindrical body 112 together enclose a receiving space. A through hole is provided in the middle of the top plate 113.

[0028] The base 11 preferably also includes reinforcing ribs 114 to increase the strength of the base 11. A plurality of reinforcing ribs 114 are provided between the outer periphery of the bottom of the cylinder 112 and the base plate 111, spaced apart circumferentially. A plurality of reinforcing ribs 114 are provided between the outer periphery of the top of the cylinder 112 and the top plate 113, spaced apart circumferentially.

[0029] The bed 12 is rotatably mounted on the base 11. Specifically, the bed 12 is rotatably connected to the base 11 via a rotating mechanism, which includes a rotating plate 13 and a power component. The rotating plate 13 extends upward through a hole in the top plate 113, so that the top of the rotating plate 13 extends upward beyond the top plate 113. There is a gap between the rotating plate 13 and the top plate 113, thereby ensuring that the rotating plate 13 can rotate smoothly.

[0030] Furthermore, the base 11 also includes a cover plate 115 disposed on the top plate 113, and the cover plate 115 is screwed to the top plate 113 by fasteners. The cover plate 115 has a through hole in the middle, through which the rotating plate 13 extends upwards, so that the top of the rotating plate 13 extends upwards beyond the cover plate 115. There is a gap between the rotating plate 13 and the cover plate 115, thereby ensuring that the rotating plate 13 can rotate smoothly. That is, the cover plate 115 is used to cover the space between the top of the cylinder 112 and the outer periphery of the rotating plate 13.

[0031] The rotating plate 13 is connected and fixed to the bed 12, thereby driving the bed 12 to rotate. The power component is connected to the rotating plate 13 and drives the rotating plate 13 to rotate. The power component is located inside the cylinder 112, specifically within the accommodating space of the base 11.

[0032] The bed 12 is hollow inside. Specifically, the bed 12 has a square cross-section. The bed 12 includes a top wall and a bottom wall that are spaced apart in parallel, as well as an inner wall and an outer wall that connect the top wall and the bottom wall. The inner wall is closer to the milling assembly 15, and the outer wall is farther away from the milling assembly 15. The bed 12 also includes end plates disposed at both ends in the longitudinal direction.

[0033] The bed 12 has an adjustment hole 121 extending along its length on its side. The length of the adjustment hole 121 is less than the length of the bed 12. In this embodiment, the adjustment hole 121 is located on the outer side wall.

[0034] The adjustment hole 121 is located in the middle area of ​​the bed 12, specifically, the adjustment hole 121 extends from the center of the bed 12 along its length to both ends.

[0035] The bed 12 is connected to the rotating plate 13 of the rotating mechanism via a clamping member 14. The clamping member 14 includes a first connecting plate 141, a second connecting plate 142 perpendicular to the first connecting plate 141, a connecting rod 143, and a clamping nut. In this embodiment, the first connecting plate 141 and the second connecting plate 142 are L-shaped.

[0036] The first connecting plate 141 is connected to the top of the rotating plate 13. Specifically, the first connecting plate 141 is screwed to the rotating plate 13.

[0037] The second connecting plate 142 is attached to the side of the bed 12. The connecting rod 143 is connected to the second connecting plate 142 and extends into the adjusting hole 121. The clamping nut is screwed to the connecting rod 143 and together with the second connecting plate 142, clamps the bed 12. In this embodiment, the second connecting plate 142 has a threaded hole, and the connecting rod 143 is screwed to the second connecting plate 142.

[0038] The top of the bed 12 has multiple operating holes 122, which are spaced apart along the length of the bed 12. The operating holes 122 allow the operator to insert into the bed 12, and a clamping nut is screwed onto the connecting rod 143. The clamping nut and the second connecting plate 142 together clamp the outer wall of the bed 12. The size of the clamping nut is larger than the vertical dimension of the adjusting hole 121 to clamp the outer wall with the second connecting plate 142.

[0039] The operating hole 122 can also reduce the weight of the bed 12.

[0040] The number of clamping members 14 can be two, and the two clamping members 14 are arranged at intervals along the length direction of the bed 12. In other embodiments, only one clamping member 14 may be provided, or three or four may be provided, depending on the actual needs.

[0041] The milling assembly 15 includes a base and a milling head 154 mounted on the base. The base is mounted on the bed 12 and is able to rotate with the bed 12.

[0042] Combination Figure 3 and Figure 4 The machine base includes an outer sleeve 151 and an inner sleeve 152 that are hollow inside and nested together, and a transition plate 153 connected to the bed 12. The outer sleeve 151 is fixedly connected to the transition plate 153, the inner sleeve 152 can move up and down relative to the outer sleeve 151, and the drill and milling head 154 is connected to the inner sleeve 152 and can rise and fall with the inner sleeve 152.

[0043] The transition plate 153 is disposed on the outer periphery of the outer sleeve 151 facing the bed 12, and multiple connection holes 1531 are provided on the transition plate 153.

[0044] The inner sleeve 152 is raised and lowered via a lifting mechanism. The lifting mechanism includes a first connecting plate 161, a second connecting plate 162, and a lead screw 163. The first connecting plate 161 is fitted around the outer circumference of the outer sleeve 151 and is fixedly connected to it. The second connecting plate 162 is fitted around the outer circumference of the inner sleeve 152 and is fixedly connected to it. The second connecting plate 162 is located below the first connecting plate 161. The lead screw 163 passes through the first connecting plate 161 and the second connecting plate 162 and is screwed to both.

[0045] Specifically, the axial height of the inner sleeve 152 is greater than the axial height of the outer sleeve 151.

[0046] A handwheel 164 is provided on the top of the lead screw 163. The handwheel 164 is coaxial with the lead screw 163, and the lead screw 163 is rotated by operating the handwheel 164.

[0047] Furthermore, the lifting mechanism also includes a guide groove 165 and a positioning rod 166. The guide groove 165 is disposed on the outer periphery of the inner sleeve 152 and extends axially along the inner sleeve 152. The positioning rod 166 is screwed to the outer sleeve 151 and can approach the guide groove 165 to abut against the inner sleeve 152 or disengage from the inner sleeve 152, allowing the positioning rod 166 to move up and down along the guide groove 165.

[0048] The lifting mechanism operates as follows: Handwheel 164 rotates the lead screw 163, which in turn raises and lowers the second connecting plate 162 relative to the lead screw 163. Since the first connecting plate 161 is fixed to the transition plate 153, and the transition plate 153 is connected to the bed 12, the second connecting plate 162, carrying the milling head 154, can rise and fall relative to the bed 12. During the raising and lowering of the inner sleeve 152, the positioning rod 166 is located within the guide groove 165 but does not abut against the inner sleeve 152, allowing the inner sleeve 152 to only move up and down, preventing circumferential rotation. After the milling head 154 reaches the preset height, rotation stops, and the positioning rod 166 is tightened, pressing against the inner sleeve 152 to maintain its position and thus the height of the milling head 154.

[0049] See Figure 3 The milling assembly 15 includes a spindle 155 and a rotary drive 156 that drives the spindle 155 to rotate. The top of the spindle 155 is fixedly connected to the milling head 154, and the bottom of the spindle 155 is connected to the rotary drive 156. That is, the spindle 155 is driven to rotate by the rotary drive 156, which in turn drives the milling head 154 to rotate.

[0050] Specifically, the rotary drive 156 is located below the inner sleeve 152, and the main shaft 155 extends into the inner sleeve 152. In this embodiment, the housing of the rotary drive 156 is fixedly connected to the inner sleeve 152, specifically through a fixed connection between the housing and the second socket plate 162.

[0051] Preferably, the rotary drive 156 has a height adjustment function, that is, the drill and milling head 154 can be raised and lowered slightly by the adjustment function of the rotary drive 156 itself.

[0052] The rotatable milling machine 1 includes a moving mechanism to enable movement of the machine base relative to the bed 12 along the length of the bed 12. Figure 2 and Figure 3 The moving mechanism includes a rack 171, a gear 172, and a moving drive 173. The rack 171 is mounted on the bed 12 and moves along the length of the bed 12. The gear 172 is mounted on the machine base and meshes with the rack 171. The moving drive 173 is connected to the gear 172 and drives the gear 172 to rotate.

[0053] Specifically, rack 171 is disposed on the top of bed 12, and rack 171 is disposed on the edge of the top of bed 12, that is, on the edge of the top wall. The base includes a support plate, which is fixedly connected to transition plate 153, gear 172 is rotatably disposed on the support plate, and moving drive 173 is disposed on the support plate.

[0054] Furthermore, the moving mechanism also includes a slide rail 174 and a slider 175. The slide rail 174 is mounted on the bed 12 and moves along the length of the bed 12. The slider 175 is mounted on the machine base and slides in engagement with the slide rail 174.

[0055] The slider 175 is provided with a mounting hole, and the slider 175 and the transition plate 153 are connected by fasteners inserted into the mounting hole and the connection hole 1531.

[0056] Specifically, in this embodiment, there are two slide rails 174, spaced apart in the vertical direction. There are four sliders 175, arranged in pairs, corresponding to one slide rail 174. That is, the sliders 175 are arranged in a 2×2 configuration.

[0057] Preferably, the slide rail 174 is a dovetail slide rail 174, and the slider 175 is a dovetail slider 175.

[0058] The working principle of the moving mechanism is as follows: when the moving drive component 173 is activated, the drive gear 172 moves along the rack 171, which drives the slider 175 to move along the slide rail 174, and then drives the machine base to move along the length direction of the bed 12, adjusting the distance between the drill and milling head 154 and the center of the rotating plate 13, that is, adjusting the rotation radius.

[0059] In this application, the distance between the milling assembly 15 and the rotation center can be adjusted by a moving mechanism, or by the cooperation between the clamping member 14 and the adjusting hole 121. The former involves fixing the rotation center and moving the milling assembly 15, while the latter involves fixing the milling assembly 15 and moving the rotation center. Both methods can also be combined for simultaneous adjustment.

[0060] The rotatable milling machine 1 is used as follows: Move the rotatable milling machine 1 to the workpiece to be processed or move the workpiece to the rotatable milling machine 1.

[0061] The position of the drill and milling head 154 relative to the workpiece is adjusted by the moving mechanism, the clamping part 14 and the adjusting hole 121, and the height of the drill and milling head 154 is adjusted by the lifting mechanism so that the position of the drill and milling head 154 meets the requirements.

[0062] Start the milling head 154 to rotate and perform milling.

[0063] After the milling head 154 has completed one revolution and met the machining requirements, the position of the milling head 154 along the length of the bed 12 can be adjusted to perform another revolution of milling.

[0064] Repeat the above steps until the entire surface of the workpiece has been processed.

[0065] That is, after the rotatable milling machine 1 is positioned and installed once, it can complete the milling of the entire surface of the workpiece to be processed.

[0066] The milling operation performed by this rotary milling machine 1 can meet the surface accuracy and roughness requirements of the workpiece, thereby eliminating welding deformation. This rotary milling machine has a simple structure, low cost, and high machining accuracy.

[0067] In summary, this rotary milling machine has the following advantages: The milling head of this rotatable milling machine can be raised and lowered relative to the bed to adjust the height of the milling head. The machine base can move along the length of the bed to adjust the machining radius of the machine base as it rotates with the bed. This allows it to meet the milling needs of ring-shaped structural planes of different sizes after a single positioning and installation. It solves the problems of multiple positioning and installation, multiple adjustments, and multiple milling operations, greatly improving machining efficiency and ensuring machining accuracy.

[0068] This rotatable milling machine is easy to disassemble and assemble, and can be widely used for processing equipment mounting bases on large-size, ring-shaped steel structures on ships and marine engineering equipment.

[0069] Although the present invention has been described with reference to several typical embodiments, it should be understood that the terminology used is descriptive and exemplary, and not restrictive. Since the present invention can be embodied in many forms without departing from the spirit or essence of the invention, it should be understood that the above embodiments are not limited to any of the foregoing details, but should be interpreted broadly within the spirit and scope defined by the appended claims. Therefore, all variations and modifications falling within the scope of the claims or their equivalents should be covered by the appended claims.

Claims

1. A rotatable milling machine, characterized in that, include: Base; The bed is rotatably mounted on the base; A milling assembly includes a base and a milling head mounted on the base. The base is disposed on a bed and can rotate with the bed. The milling head can rotate relative to the base to perform milling operations. The drilling and milling head can be raised and lowered relative to the bed to adjust the height of the drilling and milling head, and the machine base can be moved along the length of the bed to adjust the machining radius of the machine base as the bed rotates.

2. The rotatable milling machine according to claim 1, characterized in that, The rotatable milling machine includes a moving mechanism, which comprises: A rack, which is disposed on the bed and moves along the length of the bed; A gear, which is mounted on the base and meshes with the rack; A movable drive component is connected to the gear and drives the gear to rotate.

3. The rotatable milling machine according to claim 2, characterized in that, The mobile mechanism also includes: A slide rail is provided on the bed and moves along the length of the bed; A slider is disposed on the base and slides in cooperation with the slide rail.

4. The rotatable milling machine according to claim 1, characterized in that, The machine base includes an outer sleeve and an inner sleeve that are hollow inside and nested together, as well as a transition plate connected to the bed. The outer sleeve is fixedly connected to the transition plate, and the inner sleeve can move up and down relative to the outer sleeve. The drill and milling head is connected to the inner sleeve and can move up and down with the inner sleeve.

5. The rotatable milling machine according to claim 4, characterized in that, The inner sleeve is raised and lowered via a lifting mechanism, which includes: The first connecting plate is sleeved on the outer periphery of the outer sleeve and connected and fixed to the outer sleeve; The second sleeve plate is fitted around the outer periphery of the inner sleeve and is connected and fixed to the inner sleeve; the second sleeve plate is located below the first sleeve plate; A lead screw passes through the first socket plate and the second socket plate, and is screwed to the first socket plate and the second socket plate.

6. The rotatable milling machine according to claim 5, characterized in that, The top of the lead screw is equipped with a handwheel, which is coaxial with the lead screw; The lifting mechanism further includes a guide groove and a positioning rod. The guide groove is disposed on the outer periphery of the inner sleeve and extends along the axial direction of the inner sleeve. The positioning rod is screwed to the outer sleeve and can approach the guide groove to abut against the inner sleeve or disengage from the inner sleeve so that the positioning rod can move up and down along the guide groove.

7. The rotatable milling machine according to claim 1, characterized in that, The bed is rotatably connected to the base via a rotating mechanism, the rotating mechanism comprising: A rotating plate, which is connected and fixed to the bed; A power component, which is connected to the rotating plate and drives the rotating plate to rotate; The base includes a base plate, a cylinder disposed on the base plate, and a top plate disposed on the cylinder. A through hole is provided in the middle of the top plate, and the rotating plate extends upward through the through hole to the top plate. The power component is disposed inside the cylinder.

8. The rotatable milling machine according to claim 1, characterized in that, The bed is hollow inside, and the side of the bed is provided with adjustment holes extending along its own length. The bed is rotatably connected to the base through a rotating mechanism, and the bed and the rotating plate of the rotating mechanism are connected by a clamping member. The clamping component includes a first connecting plate, a second connecting plate perpendicular to the first connecting plate, a connecting rod, and a clamping nut. The first connecting plate is connected to the top of the rotating plate, the second connecting plate is attached to the side of the bed, the connecting rod is connected to the second connecting plate and extends into the adjustment hole, and the clamping nut is screwed to the connecting rod and together with the second connecting plate clamps the bed.

9. The rotatable milling machine according to claim 8, characterized in that, The length of the adjustment hole is less than the length of the bed; The top of the bed has multiple operating holes, which are spaced apart along the length of the bed.

10. The rotatable milling machine according to claim 1, characterized in that, The milling assembly includes a spindle and a rotary drive for driving the spindle to rotate. The top of the spindle is fixedly connected to the milling head, and the bottom of the spindle is connected to the rotary drive.

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