CN216576829U - Large-diameter thread milling machine tool rest - Google Patents
Large-diameter thread milling machine tool rest Download PDFInfo
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- CN216576829U CN216576829U CN202123307752.7U CN202123307752U CN216576829U CN 216576829 U CN216576829 U CN 216576829U CN 202123307752 U CN202123307752 U CN 202123307752U CN 216576829 U CN216576829 U CN 216576829U
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- 238000003801 milling Methods 0.000 title claims abstract description 22
- 230000007246 mechanism Effects 0.000 claims abstract description 104
- 230000005540 biological transmission Effects 0.000 claims abstract description 29
- 230000033001 locomotion Effects 0.000 claims abstract description 21
- 238000003754 machining Methods 0.000 claims abstract description 11
- 210000001503 joint Anatomy 0.000 claims description 6
- 230000003028 elevating effect Effects 0.000 claims description 4
- 125000003003 spiro group Chemical group 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 10
- 230000008569 process Effects 0.000 abstract description 7
- 238000009434 installation Methods 0.000 description 7
- 238000005553 drilling Methods 0.000 description 6
- 230000009471 action Effects 0.000 description 3
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000011295 pitch Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
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Abstract
The utility model discloses a major diameter thread milling machine knife rest relates to lathe technical field. The device comprises a rotary worktable, a cutter and a transmission control mechanism for controlling the cutter to move, wherein the transmission control mechanism is arranged above the rotary worktable; the transmission control mechanism comprises a cutter base, a lifting mechanism, a first moving mechanism and a second moving mechanism, the lifting mechanism drives the cutter base to move up and down, the first moving mechanism drives the lifting mechanism to move horizontally, and the second moving mechanism drives the first moving mechanism and the lifting mechanism to move horizontally. The utility model discloses a steerable cutter of knife rest drive mechanism removes in space range, and the rotary motion of cutter cooperable workstation, just can process out the screw of different models with a sword, and screw machining precision is higher.
Description
Technical Field
The utility model relates to the technical field of machine tools, especially, relate to a major diameter thread milling machine knife rest.
Background
For large ring-type workpieces, drilling, milling and thread machining are generally performed by a large rotary machine tool. The workbench of the large-scale rotary machine tool can rotate, so that the tool rest of the large-scale rotary machine tool is relatively simple in transmission structure, and can only perform simple in-plane linear movement and lifting movement, and the machine tool can also perform standardized drilling, milling and thread machining on large-scale ring workpieces such as wind power bearings.
However, when the machine tool is used for processing the threaded holes of the large ring workpiece, for the threaded holes with different diameters, different tooth depths and different thread pitches, various corresponding cutters need to be replaced correspondingly, and the replacement operation is troublesome; further, the machine tool is not suitable for non-standard thread machining.
SUMMERY OF THE UTILITY MODEL
The utility model provides a major diameter thread milling machine knife rest, the steerable cutter of the knife rest drive mechanism of lathe removes in space range, and the rotary motion of cutter cooperable workstation, just can process out the screw of different models with a sword, and screw machining precision is higher for solve above-mentioned technical problem.
The utility model provides a technical scheme of above-mentioned problem is: the tool rest of the large-diameter thread milling machine comprises a rotary worktable, a cutter and a transmission control mechanism for controlling the cutter to move and operate, wherein the transmission control mechanism is arranged above the rotary worktable; the transmission control mechanism comprises a cutter base, a lifting mechanism, a first moving mechanism and a second moving mechanism, the lifting mechanism drives the cutter base to move up and down, the first moving mechanism drives the lifting mechanism to move horizontally, and the second moving mechanism drives the first moving mechanism and the lifting mechanism to move horizontally; the transmission control mechanism controls the cutter to move and is matched with the rotating rotary worktable so as to carry out non-standard thread processing on the workpiece on the rotating worktable.
Further, still include the actuating mechanism who is used for driving cutter rotary motion, actuating mechanism's one end department, driving motor drives first ball screw and rotates to drive cutter base and cutter rotary motion. The tool is rotated to perform thread machining on a machining workpiece on the rotary table.
Furthermore, a transmission belt wheel is installed on an output rotating shaft of the driving motor, the transmission belt wheel is correspondingly arranged on the first ball screw, and the driving motor drives the first ball screw to rotate synchronously in a belt transmission mode.
Further, elevating system includes elevator motor, second ball screw, ram seat, actuating mechanism and cutter base all install on the ram, elevator motor fixed mounting is on the ram seat, the second ball screw with elevator motor's the coaxial fixed connection of output axis of rotation, be equipped with the screw thread through-hole on the ram for the second ball screw spiro union passes, the ram slides and sets up on the ram seat, the ram slides along the direction of ram seat.
Further, the first moving mechanism comprises a first motor, a first lead screw and a sliding seat, the first motor is fixedly installed on the sliding seat, the first lead screw is fixedly connected with the output rotating shaft of the first motor in a coaxial mode, a threaded through hole is formed in the ram seat and is used for the first lead screw to penetrate through in a threaded mode, and the ram seat is arranged on the sliding seat in a sliding mode.
Further, the second moving mechanism comprises a second motor, a second lead screw and a cross beam, the second motor is fixedly installed on the cross beam, the second lead screw is fixedly connected with the output rotating shaft of the second motor in a coaxial mode, a threaded through hole is formed in the sliding seat and is used for the second lead screw to penetrate through in a threaded mode, and the sliding seat is arranged on the cross beam in a sliding mode.
Further, the both sides of crossbeam all install and are provided with the installing support, the installing support is used for installing the tool magazine, the installing support symmetry sets up in swivel work head's both sides to prop up transmission control mechanism and swivel work head top, and control cutter removes in swivel work head center or midline region, in order to improve the machining precision.
Furthermore, the second motors and the second screw rods are respectively provided with two, the two second motors are oppositely arranged at two ends of the cross beam, and the two second screw rods are in seamless butt joint at the middle part of the cross beam.
Further, the motor further comprises a coupler, and the coupler is connected and arranged between the output rotating shaft of the second motor and the second screw rod.
Furthermore, the inclination angle and the pitch of the threads on the two second screw rods are consistent, so that the thread lines of the two second screw rods are also in seamless butt joint when the two second screw rods are in seamless butt joint.
Furthermore, the direct-drive working motor is used for directly driving the rotary worktable to rotate.
The utility model has the advantages that:
the utility model discloses major diameter thread milling machine knife rest of embodiment, its swivel work head rotary motion can drive lopps work piece rotary motion, and the cooperation can drive the elevating system of cutter in vertical plane elevating movement to make the cutter can carry out screw hole processing in the different positions department of the circumference of lopps work piece, can make the screw hole of the different degree of depth.
The lifting mechanism is matched with the first moving mechanism, and can control the cutter to linearly move above the rotary worktable so as to control the cutter to machine a linear hole on the annular workpiece.
When the first moving mechanism and the second moving mechanism are matched with each other, the cutter can be controlled to do circular motion with different diameters in a horizontal plane, so that threaded holes with different diameters are machined in the static ring-shaped workpiece. The workpiece only needs to rotate together with the rotary workbench on the rotary workbench, the rotary workbench does not need to bear the heavy weight of the workpiece and does linear movement, and the rotary workbench is low in burden.
In addition, as the cutter that can three-axis move, it is when cooperating rotatable swivel work head, comes to carry out operations such as drilling, mill, screw thread processing to the work piece on the swivel work head, and this application can carry out the more complicated, the precision of structural style completely to and the processing degree of difficulty is higher bores, mills, screw thread processing operation. For example, a profiled bore is machined into an annular workpiece.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention. In the drawings, like reference numerals are used to indicate like elements. The drawings in the following description are directed to some, but not all embodiments of the invention. For a person skilled in the art, other figures can be derived from these figures without inventive effort.
FIG. 1 is a schematic view of the overall structure of a machine tool according to an embodiment of the present invention;
FIG. 2 is a schematic structural view of a rotary table according to an embodiment of the present invention;
fig. 3 is a schematic structural view of a lifting mechanism according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a first moving mechanism according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a second moving mechanism according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a driving mechanism according to an embodiment of the present invention;
FIG. 7 is an enlarged view of a portion of FIG. 1;
1-rotating workbench, 2-cutter, 3-transmission control mechanism, 4-cutter base, 5-lifting mechanism, 6-first moving mechanism, 7-second moving mechanism, 8-driving mechanism, 9-driving motor, 10-first ball screw, 11-driving belt wheel, 12-lifting motor, 13-second ball screw, 14-ram, 15-ram seat, 16-first motor, 17-first screw, 18-slide seat, 19-second motor, 20-second screw, 21-beam, 22-mounting bracket and 23-coupler.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Referring to fig. 1 to 5, a large-diameter thread milling machine tool post according to an embodiment of the present invention includes a rotary table 1, a tool 2, and a transmission control mechanism 3 for controlling the tool 2 to move, wherein the transmission control mechanism 3 is disposed above the rotary table 1; the transmission control mechanism 3 comprises a cutter base 4, a lifting mechanism 5, a first moving mechanism 6 and a second moving mechanism 7, wherein the lifting mechanism 5 drives the cutter base 4 to move up and down, the first moving mechanism 6 drives the lifting mechanism 5 to move horizontally, and the second moving mechanism 7 drives the first moving mechanism 6 to move horizontally; the transmission control mechanism 3 controls the cutter 2 to move and then is matched with the rotating rotary worktable 1 to carry out non-standard thread processing on the workpiece on the rotary worktable 1.
In the present embodiment, specifically, the tool 2 rotates to perform drilling, milling and thread machining operations, and in the present embodiment, a driving mechanism 8 is correspondingly disposed to drive the tool 2 to rotate at a high speed. The driving mechanism 8 comprises a driving motor 9 and a first ball screw 10, the driving motor 9 and the first ball screw 10 are both arranged on the lifting mechanism 5, the first ball screw 10 is rotatable, and the lower end of the first ball screw 10 is fixedly connected with the cutter base 4 to drive the cutter base 4 and the cutter 2 to synchronously rotate with the cutter base 4 and the cutter 2. A transmission belt wheel 11 is installed at the upper end of the first ball screw 10, a transmission belt wheel 11 is also installed on an output rotating shaft of the driving motor 9, the axis of the driving motor 9 is parallel to the axis of the first ball screw 10 and is installed on the lifting mechanism 5, and the driving motor 9 drives the cutter 2 to synchronously rotate with the output rotating shaft in a belt transmission mode, so that the cutter 2 can perform operations of drilling, milling and thread machining.
In this embodiment, specifically, the lifting mechanism 5, the first moving mechanism 6, and the second moving mechanism 7 are all configured as a screw transmission structure, and the purpose of the screw transmission structure is to enable the minimum moving distance unit of the tool 2 moving in the X, Y, Z three-axis direction to reach a high precision standard, so as to meet the high precision processing requirement for large ring-shaped workpieces.
The lifting mechanism 5 comprises a lifting motor 12, a second ball screw 13, a ram 14 and a ram seat 15; the ram seat 15 is provided with a vertical sliding limiting groove, and the ram 14 is slidably mounted in the sliding limiting groove. The bottom of the sliding limiting groove is also provided with an installation inner cavity, and a second ball screw 13 can be rotatably installed in the installation inner cavity; the lifting motor 12 is fixedly installed at the upper end of the ram seat 15, and an output rotating shaft of the lifting motor 12 extends into the installation inner cavity and is coaxially and fixedly connected with the upper end of the second ball screw 13. A coupling 23 is arranged between the second ball screw 13 and the output rotating shaft of the lifting motor 12 so as to realize the purpose of coaxial fixed connection.
The ram 14 is integrally provided with a connecting lug, the connecting lug is provided with a bolt through hole, and when the ram 14 is slidably mounted on the ram seat 15, the second ball screw 13 is also in bolt connection with the bolt through hole penetrating through the connecting lug. When the lifting motor 12 drives the second ball screw 13 to rotate, the ram 14 is matched to make a thread feeding linear motion on the ram seat 15, so as to control the cutter 2 to reciprocate along the Z-axis direction.
The lifting mechanism 5 is used for controlling the linear movement of the tool 2 in the Z-axis direction. When the threaded hole is vertically machined, the lifting mechanism 5 controls the vertical moving distance of the cutter 2 so as to control the hole depth of the threaded hole; or when the threaded hole is processed laterally, the lifting mechanism 5 is matched with the first moving mechanism 6 to control the diameter of the threaded hole; and so on.
In addition, the first moving mechanism 6 comprises a first motor 16, a first screw rod 17 and a sliding base 18, wherein a sliding limiting groove in the horizontal X-axis direction is formed in the sliding base 18, and the ram base 15 is slidably mounted in the sliding limiting groove. The bottom of the sliding limiting groove is also provided with an installation inner cavity, and the first screw rod 17 can be rotatably installed in the installation inner cavity; the first motor 16 is fixedly mounted on the slide 18, the first motor 16 is arranged along the X-axis direction, and the first lead screw 17 is also arranged along the X-axis direction. An output rotating shaft of the first motor 16 extends into the mounting inner cavity, and is coaxially and fixedly connected with the first screw rod 17; the shaft end of the output rotating shaft of the first motor 16 is fixedly provided with a coupling 23, and the coupling 23 is fixedly connected with the first screw rod 17 so as to realize the coaxial fixed connection of the first screw rod 17 and the output rotating shaft of the first motor 16.
The ram seat 15 is also integrally provided with a connecting lug, the connecting lug is provided with a threaded through hole, when the ram seat 15 is arranged on the slide seat 18 in a sliding manner, the first screw rod 17 is further screwed to penetrate through the screwed through hole on the connecting lug, the first motor 16 drives the first screw rod 17 to rotate, the ram seat 15 is limited on the slide seat 18 by a sliding limiting groove on the slide seat 18, and the ram seat 15 is only matched with the first screw rod 17 to perform thread feeding motion so as to realize the purpose of controlling the movement of the lifting mechanism 5 along the horizontal X-axis direction by the first moving mechanism 6.
The first moving mechanism 6 is used for controlling the cutter 2 to move in the horizontal X-axis direction, and when the threaded hole is machined vertically, the first moving mechanism 6 can be matched with the second threaded mechanism to control the cutter 2 to move in the horizontal plane and then matched with the rotary workbench 1, so that the roundness of the threaded hole is more accurate. In the simple drilling process, the first moving mechanism 6, the second moving mechanism 7 and the rotary table 1 are mutually matched in motion, and various non-standard holes with different sizes and shapes can be manufactured.
The second moving mechanism 7 includes a second motor 19, a second screw 20, and a beam 21, the beam 21 is provided with a horizontal Y-axis sliding limit groove, and the slide carriage 18 is slidably mounted in the sliding limit groove. The bottom of the sliding limiting groove is also provided with an installation groove, and the second screw rod 20 can be rotatably installed in the installation groove; the second motor 19 is fixedly arranged on the cross beam 21, the second motor 19 is arranged along the Y-axis direction, and the second screw rod 20 is also arranged along the Y-axis direction; the output rotating shaft of the second motor 19 extends into the mounting groove, the output rotating shaft of the second motor 19 is connected with the second lead screw 20 in a coaxial solid mode, a coupler 23 is fixedly mounted at the shaft end of the output rotating shaft of the second motor 19, and the coupler 23 is fixedly connected with the second lead screw 20 so that the output rotating shaft of the second motor 19 is fixedly connected with the second lead screw 20 in a coaxial mode.
In addition, a connection lug is integrally arranged on the sliding seat 18, a threaded through hole is formed in the connection lug, and when the sliding seat 18 is arranged on the cross beam 21 in a sliding mode, the second screw rod 20 is further screwed and penetrates through the screwed through hole in the connection lug. The second motor 19 drives the second screw rod 20 to rotate, the sliding seat 18 is limited in the sliding limiting groove, and the sliding seat 18 only cooperates with the second screw rod 20 to perform thread feeding motion, so that the purpose of controlling the movement of the first moving mechanism 6 along the horizontal Y-axis direction by the second moving mechanism 7 is achieved.
The second moving mechanism 7 is used for controlling the cutter 2 to move in the horizontal Y-axis direction, and when the threaded hole is machined vertically, the second moving mechanism 7 and the second moving mechanism 7 are matched with each other to control the diameter of the threaded hole. Or when a threaded hole is machined laterally, the second moving mechanism 7 is used for controlling the feed amount of the tool 2.
In this embodiment, specifically, the cross member 21 is a basic mounting structure, and to dispose the entire transmission control mechanism 3 above the rotary table 1, it is necessary to dispose the cross member 21 above the rotary table 1. Therefore, the overall length of the beam 21 in this embodiment is greater than the diameter of the rotary table 1, and the mounting brackets 22 are fixedly provided at both ends of the beam 21, the mounting brackets 22 are used for mounting the tool magazine, and the beam 21 is supported by the mounting brackets 22 to maintain the reference height position of the beam 21.
In this embodiment, specifically, since the length of the cross beam 21 is greater than the diameter of the rotary table 1, and the overall length dimension of the cross beam 21 is large in the case of a large ring-like workpiece, the length and the straightness of the single second screw 20 are not sufficient to push the tool 2 to move along the horizontal Y-axis direction of the cross beam 21, and therefore, the number of the second motor 19 and the number of the second screw 20 are both two.
The two second motors 19 are respectively arranged at two ends of the cross beam 21 along the Y-axis direction, the two second screw rods 20 are respectively and fixedly connected with the second motors 19 coaxially through the couplers 23, the two second screw rods 20 are mutually abutted at the middle position of the cross beam 21, and the thread specifications on the two second screw rods 20 are completely the same, so that the two second screw rods 20 are not only mutually abutted on the end surfaces of the two second screw rods 20 at the middle position of the cross beam 21, and the peripheral threads of the screw rods are also perfectly and seamlessly abutted, so that the sliding base 18 can smoothly move between the two second screw rods 20 in the spiral feeding motion process.
Where not mentioned above, all are applicable to the prior art.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (10)
1. The utility model provides a major diameter thread milling machine knife rest which characterized in that: the device comprises a rotary workbench (1), a cutter (2) and a transmission control mechanism (3) for controlling the cutter (2) to move, wherein the transmission control mechanism (3) is arranged above the rotary workbench (1); the transmission control mechanism (3) comprises a cutter base (4), a lifting mechanism (5), a first moving mechanism (6) and a second moving mechanism (7), the lifting mechanism (5) drives the cutter base (4) to move up and down, the first moving mechanism (6) drives the lifting mechanism (5) to move horizontally, and the second moving mechanism (7) drives the first moving mechanism (6) and the lifting mechanism (5) to move horizontally; the transmission control mechanism (3) controls the cutter (2) to move and then is matched with the rotating rotary worktable (1) to perform non-standard thread machining on the workpiece on the rotary worktable (1).
2. A large diameter thread milling machine tool holder as defined in claim 1, wherein: still include actuating mechanism (8) that are used for driving cutter (2) rotary motion, actuating mechanism (8) include driving motor (9) and first ball screw (10), the one end department at first ball screw (10) is installed in cutter base (4), driving motor (9) drive first ball screw (10) and rotate to drive cutter base (4) and cutter (2) rotary motion.
3. A large diameter thread milling machine tool holder as claimed in claim 2, wherein: the output rotating shaft of the driving motor (9) is provided with a transmission belt wheel (11), the first ball screw (10) is also correspondingly provided with the transmission belt wheel (11), and the driving motor (9) drives the first ball screw (10) to synchronously rotate in a belt transmission mode.
4. A large diameter thread milling machine tool holder as claimed in claim 2, wherein: elevating system (5) are including elevator motor (12), second ball screw (13), ram (14), ram seat (15), actuating mechanism (8) and cutter base (4) are all installed on ram (14), elevator motor (12) fixed mounting is on ram seat (15), second ball screw (13) with the coaxial fixed connection of output axis of rotation of elevator motor (12), be equipped with the screw through-hole on ram (14) and supply second ball screw (13) spiro union is passed, ram (14) slide and set up on ram seat (15), ram (14) slide along the direction of direction slip of ram seat (15).
5. A large diameter thread milling machine tool holder as claimed in claim 4, wherein: the first moving mechanism (6) comprises a first motor (16), a first screw rod (17) and a sliding seat (18), the first motor (16) is fixedly installed on the sliding seat (18), the first screw rod (17) is fixedly connected with the output rotating shaft of the first motor (16) in a coaxial mode, a threaded through hole is formed in the ram seat (15) to enable the first screw rod (17) to penetrate in a threaded mode, and the ram seat (15) is arranged on the sliding seat (18) in a sliding mode.
6. A large diameter thread milling machine tool holder as claimed in claim 5, wherein: the second moving mechanism (7) comprises a second motor (19), a second screw rod (20) and a cross beam (21), the second motor (19) is fixedly installed on the cross beam (21), the second screw rod (20) is fixedly connected with the output rotating shaft of the second motor (19) in a coaxial mode, a threaded through hole is formed in the sliding seat (18) to enable the second screw rod (20) to penetrate in a threaded mode, and the sliding seat (18) is arranged on the cross beam (21) in a sliding mode.
7. A large diameter thread milling machine tool holder as claimed in claim 6, wherein: the tool magazine is characterized in that mounting supports (22) are arranged on two sides of the cross beam (21), the mounting supports (22) are used for mounting the tool magazine, and the mounting supports (22) are symmetrically arranged on two sides of the rotary workbench (1).
8. A large diameter thread milling machine tool holder as claimed in claim 6, wherein: the two second motors (19) and the two second screw rods (20) are arranged, the two second motors (19) are oppositely arranged at two ends of the cross beam (21), and the two second screw rods (20) are in seamless butt joint at the middle of the cross beam (21).
9. A large diameter thread milling machine tool holder as claimed in claim 6, wherein: the motor is characterized by further comprising a coupler (23), wherein the coupler (23) is connected and arranged between an output rotating shaft of the second motor (19) and the second screw rod (20).
10. A large diameter thread milling machine tool holder as defined in claim 8, wherein: the thread inclination angles and the thread intervals on the two second screw rods (20) are consistent, so that the thread lines of the two second screw rods (20) are also in seamless butt joint when the two second screw rods (20) are in seamless butt joint.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123307752.7U CN216576829U (en) | 2021-12-27 | 2021-12-27 | Large-diameter thread milling machine tool rest |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123307752.7U CN216576829U (en) | 2021-12-27 | 2021-12-27 | Large-diameter thread milling machine tool rest |
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| CN216576829U true CN216576829U (en) | 2022-05-24 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114012483A (en) * | 2021-12-27 | 2022-02-08 | 浙江天马轴承集团有限公司 | A large diameter thread milling machine tool holder |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114012483A (en) * | 2021-12-27 | 2022-02-08 | 浙江天马轴承集团有限公司 | A large diameter thread milling machine tool holder |
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