A kind of processing equipment of extruder screw spindle

Abstract

The present application relates to the technical field of screw turning processing, in particular to a bulking machine screw spindle machining equipment, which comprises a machine tool, a follow rest for assisting in supporting a workpiece is arranged on the machine tool, a supporting mechanism for limiting the machined surface and the unprocessed surface of the workpiece at the same time is arranged on the follow rest, and an anti-channeling mechanism for axially assisting in limiting the workpiece is further arranged on the follow rest, the present application adopts double-face limiting and supporting of the workpiece by two abutting arms when the screw workpiece is rough machined, so that the radial feeding force of the cutter applied to the screw can be directly pointed to the follow rest, and the supporting effect is ensured, when the screw workpiece surface is finish machined, the driving assembly controls the self-adaptive clamping of the screw blade by the clamping wheel, the tracking type axial limitation of the cutter finish machining position is realized, the position deviation of the screw caused by the axial pushing of the cutter in the finish machining process is effectively avoided, and the machining quality of the screw surface is ensured.

Description

Technical Field

[0001] This invention relates to the field of screw turning technology, specifically to a machining equipment for an extruder screw spindle. Background Technology

[0002] The screw spindle of an extruder is the core component of the extrusion equipment. Its machining accuracy directly affects the working performance and service life of the equipment. The machining process generally includes: first, rough machining the outer circle of the blank by turning, then machining the thread, and finally finishing machining the screw surface. Among them, the outer circle surface is used as the reference for subsequent thread machining, and its dimensional accuracy and geometric tolerance requirements are strict. The quality of the finished screw surface is directly related to the conveying efficiency and extrusion effect of the extruder.

[0003] Since the screw spindle of an extruder usually has a large length-to-diameter ratio and is a typical slender shaft part, it is prone to problems such as tool deflection and vibration due to insufficient rigidity during turning, which affects the machining accuracy. To solve this technical problem, the existing technology usually adopts a follower support structure to provide auxiliary support for the screw.

[0004] However, existing follower posts still have the following shortcomings in practical applications: First, during the turning of outer diameter, the screw often has a stepped structure with a diameter change at the tool's machining position, i.e., the diameter of the machined area is small and the diameter of the unmachined area is large. Furthermore, due to the rough surface of the unmachined area and the poor coaxiality with the machine tool spindle, existing follower posts usually only provide limiting support for the machined surface of the screw's outer diameter. This makes it impossible for the radial feed force applied by the tool to the screw to directly point to the support structure, resulting in poor support effect and difficulty in effectively offsetting the tool deformation caused by the cutting force.

[0005] Secondly, the existing follower post contacts the screw workpiece through multiple circumferentially arranged support rollers with their axes parallel to the screw workpiece axis. Although the support rollers rotate with the screw to achieve rolling contact, axial relative sliding occurs between the support rollers and the screw workpiece when the follower post moves axially. Since the outer surface of the screw workpiece cannot be made absolutely smooth and coaxial after rough machining, the sliding friction between the support rollers and the screw workpiece fluctuates depending on the real-time micro-contact state of the two. This makes the support force of the support rollers on the workpiece unstable, affecting the support effect and causing wear on the surface of the support rollers, which in turn affects the subsequent machining quality.

[0006] Furthermore, during the finishing machining of the screw surface after the thread is completed, the screw is subjected to a large axial cutting force due to the axial push of the tool on the screw blades, which can easily cause axial movement. The existing follower support mainly provides radial support, which is difficult to effectively limit the axial movement of the screw. As a result, the screw is prone to positional displacement due to the axial push of the tool during the finishing process, which seriously affects the surface quality of the screw.

[0007] Therefore, how to achieve stable support and effective axial limiting of the screw workpiece during the machining of the screw spindle of an extruder is a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0008] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a processing equipment for a screw spindle of an extruder, including a machine tool, a follower post for auxiliary support of the workpiece is provided on the machine tool, a support mechanism for simultaneously limiting the machined surface and the unmachined surface of the workpiece is provided on the follower post, and an anti-slip mechanism for axially auxiliary limiting the workpiece is also provided on the follower post.

[0009] The support mechanism includes two C-shaped frames arranged symmetrically on the left and right and fixedly installed on the follower post. An open ring is rotatably provided on the inner side of the C-shaped frame, which rotates at the same speed and on the same axis as the workpiece. An abutment arm is provided on the open ring for abutting against the outer side of the workpiece.

[0010] When rough machining a workpiece, the open ring drives the abutment arm to center against the outside of the workpiece and rotate synchronously with the workpiece. The follower post moves synchronously with the tool, causing the abutment arm to roll along the workpiece axis.

[0011] The anti-slip mechanism includes two sets of clamping wheels set in the middle of the tool holder via a drive assembly. The two sets of clamping wheels are arranged vertically and adaptively clamp the screw blades via the drive assembly. When finishing the workpiece, the abutment arm always abuts against the screw, and the tool holder drives the clamping wheels to follow the tool axially to limit the screw.

[0012] High-precision turning of screw workpieces is achieved by using double-sided limiting and rolling contact during roughing, and axial limiting during finishing.

[0013] Preferably, an incomplete toothed ring is fixedly installed on one side of the two open rings that are far apart from each other, and three fixed servo motors are evenly distributed on the outside of the C-shaped frame. The servo motors drive the corresponding incomplete toothed rings to rotate through the drive gears connected to them.

[0014] Preferably, the abutment arm consists of a wheel frame that slides radially on the open ring and a roller that is rotatably connected to the wheel frame, with the axis of the roller perpendicular to the axis of the C-shaped frame.

[0015] Preferably, electric cylinders are evenly distributed on the inner side of the open ring, and pressure sensors are integrated on the electric cylinders. The telescopic section of the electric cylinder is fixedly connected to the corresponding wheel frame.

[0016] Preferably, during rough machining, the roller is attached to the outer surface of the workpiece and moves along the workpiece axis; during rough and finish machining, the electric cylinder pushes the roller against the workpiece with a fixed pressure.

[0017] Preferably, initially, the notch of the C-shaped frame and the opening of the open ring both face the direction of the front cutting tool, allowing the screw workpiece to pass through the C-shaped frame and the open ring and connect to the machine tool spindle.

[0018] Preferably, the drive assembly includes two base plates that are symmetrically slidably disposed on the tool holder, and two sliders that slide left and right on the base plates, with the sliders being rotatably connected to the corresponding clamping wheels.

[0019] Preferably, a hydraulic cylinder is fixedly mounted on the slider on the left side, and the telescopic section of the hydraulic cylinder is fixedly connected to another slider on the same base plate.

[0020] Preferably, a locking block is slidably disposed on the front side of the substrate, and a hydraulic cylinder two for driving the corresponding locking block is fixedly installed on the front side of the substrate, and the rear side of the locking block is rough.

[0021] Preferably, a bidirectional lead screw is rotatably mounted on the tool holder, and the bidirectional lead screw is threadedly connected to two base plates respectively. A reduction motor for driving the bidirectional lead screw to rotate is fixedly mounted on the upper side of the tool holder.

[0022] The beneficial effects of this invention are as follows: First, when rough machining a screw workpiece, the invention uses two symmetrically arranged C-shaped supports to abut against the machined and unmachined surfaces of the outer circle of the screw workpiece, respectively, thereby achieving double-sided limiting support for the workpiece. This allows the radial feed force applied by the tool to the screw to be directly directed towards the follower, effectively offsetting the tool deformation caused by the cutting force and ensuring the support effect.

[0023] Second, this invention uses an open ring and a screw workpiece to rotate at the same speed and on the same axis, thereby driving the abutment arm to rotate synchronously with the workpiece. When the follower and the tool move synchronously, the abutment arm and the screw workpiece form a pure rolling contact. On the one hand, this fundamentally avoids the generation of sliding friction and prevents the problem of unstable support force on the screw workpiece caused by friction fluctuations. On the other hand, it greatly reduces wear and ensures the accuracy of the equipment in subsequent continuous processing.

[0024] Third, this invention employs two sets of vertically arranged clamping wheels, driven by a drive assembly, positioned in the middle of the follower post during the finishing of the screw workpiece surface. These wheels adaptively clamp the screw blades, and during the finishing process, the follower post drives the clamping wheels to move synchronously with the tool position, providing axial limiting support for the screw workpiece. This achieves tracking axial limiting of the tool's finishing position, effectively preventing the screw from shifting due to the axial push of the tool during finishing, thus ensuring the machining quality of the screw surface.

[0025] Fourth, this invention uses an electric cylinder with an integrated pressure sensor to drive the wheel frame, so that the wheel frame drives the roller to always press against the screw workpiece with a fixed thrust. This can stably limit the unmachined area of ​​the screw workpiece, effectively preventing the centrifugal force generated when rotating in the unmachined area of ​​the screw workpiece from causing the traditional support structure to shake due to misalignment. This ensures the stability and reliability of the support.

[0026] Fifth, the present invention uses the retraction section of hydraulic cylinder one to drive two sliders on the same base plate to move closer to each other, so that the same set of clamping wheels can adaptively clamp both sides of the screw blade. Then, hydraulic cylinder two drives the locking block to move backward, so that the rough surface of the rear side of the locking block abuts against the slider, fixing the position of the clamping wheel and the follower post relative to each other. Thus, when the follower post moves with the tool, the clamping wheel can accurately limit the axial movement of the screw workpiece. Attached Figure Description

[0027] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0028] Figure 1 This is a schematic diagram of the overall structure of the present invention during the processing of a screw workpiece.

[0029] Figure 2 This is a side view of the tool holder, clamping wheel, incomplete toothed ring, and open ring in this invention.

[0030] Figure 3 This is a schematic diagram of the structure of the tool holder, C-shaped frame, open ring and drive gear in this invention.

[0031] Figure 4 This is a schematic diagram of the structure of the tool holder, C-shaped frame, electric cylinder and wheel frame in this invention.

[0032] Figure 5 This is a partial cross-sectional view of the open ring, roller, electric cylinder and wheel frame in this invention.

[0033] Figure 6 This is a schematic diagram of the tool holder structure in this invention.

[0034] Figure 7This is a schematic diagram of the structure of the tool holder, base plate, slider and hydraulic cylinder II in this invention.

[0035] Figure 8 This is a partial cross-sectional view of the substrate, slider, locking block and hydraulic cylinder II in this invention.

[0036] In the diagram: 1. Machine tool; 2. Tool holder; 3. Support mechanism; 4. Anti-slip mechanism; 31. C-shaped frame; 32. Open ring; 33. Support arm; 41. Drive assembly; 42. Clamping wheel; 321. Incomplete gear ring; 322. Servo motor; 323. Drive gear; 331. Wheel frame; 332. Roller; 333. Electric cylinder; 411. Base plate; 412. Slider; 413. Hydraulic cylinder one; 414. Locking block; 415. Hydraulic cylinder two; 416. Bidirectional lead screw; 417. Gear motor. Detailed Implementation

[0037] The embodiments of the present invention are described in detail below. The embodiments described below are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention. Where specific techniques or conditions are not specified in the embodiments, they shall be performed in accordance with the techniques or conditions described in the literature in the art or in accordance with the product manual.

[0038] See Figure 1 , Figure 2 and Figure 3 A machining equipment for an extruder screw spindle includes a machine tool 1, a follower post 2 for auxiliary support of the workpiece on the machine tool 1, a support mechanism 3 for simultaneously limiting the machined and unmachined surfaces of the workpiece on the follower post 2, and an anti-slip mechanism 4 for axially auxiliary limiting the workpiece on the follower post 2.

[0039] In this embodiment, the machine tool 1 adopts a CNC machining center in the prior art, and the follow post 2 adopts a movable support structure that can move axially synchronously with the tool. The machine tool 1 can perform complete forming process processing on the screw workpiece.

[0040] During rough machining, the machine tool 1 rotates at high speed on the screw workpiece that is limited thereon, with a speed between 500 and 1200 r / min. Then, the outer circle of the screw is rough machined by the tool. During this process, the follower post 2 moves synchronously along the axial direction of the screw with the tool, so that the support mechanism 3 on the follower post 2 provides follow-type limiting support for both the machined and unmachined surfaces of the screw workpiece. This allows the radial feed force applied by the tool to the screw to be directly directed towards the follower post 2, effectively offsetting the tool deformation caused by the cutting force and ensuring the support effect.

[0041] During the finishing of the screw surface, the machine tool 1 drives the screw workpiece to rotate at a low speed, between 20 and 30 r / min. As the tool and the follower 2 move at a constant speed along the screw axis, the anti-slip mechanism 4 tracks and limits the tool's finishing position axially, effectively preventing the screw from shifting due to the axial push of the tool during the finishing process. At the same time, the support mechanism 3 tracks and limits the outer circle of the screw blade radially, ensuring the stability and reliability of the support.

[0042] See Figure 1 , Figure 2 , Figure 3 and Figure 4 The support mechanism 3 includes two C-shaped frames 31 arranged symmetrically on the left and right and fixedly installed on the follower 2. An open ring 32 that rotates at the same speed and on the same axis as the workpiece is rotatably provided on the inner side of the C-shaped frame 31. An abutment arm 33 for abutting against the outer side of the workpiece is provided on the open ring 32.

[0043] During rough machining of the screw workpiece, the abutment arms 33 on the two open rings 32 are moved radially, so that the abutment arms 33 at the two positions abut against the machined surface and the unmachined surface of the screw workpiece respectively for double-sided limiting. Then, the open rings 32 rotate at the same speed as the screw, so that the abutment arms 33 and the screw workpiece rotate at the same speed. Since the rotation speeds of the two are equal, when the follower 2 is not moved axially, the abutment arms 33 and the screw workpiece are relatively stationary.

[0044] Subsequently, as the tool moves axially for roughing, the follower post 2 drives the abutment arm 33 to move axially synchronously through the C-shaped frame 31 and the open ring 32. At this time, the contact end of the abutment arm 33 and the screw workpiece rolls into contact with the screw workpiece, thereby preventing the sliding friction of the traditional support structure. This avoids the problem of unstable support force on the screw workpiece caused by fluctuations in sliding friction force, and greatly reduces the wear of the abutment arm 33, ensuring the accuracy of the equipment in subsequent continuous processing.

[0045] To ensure that the open ring 32 rotates at a uniform speed within the corresponding C-shaped frame 31, and that the rotational speed matches the rotation of the screw, the present invention designs the following structure: (See attached diagram) Figure 2 , Figure 3 and Figure 4 Two open rings 32 are fixedly installed on the side away from each other. Three fixed servo motors 322 are evenly distributed on the outside of the C-shaped frame 31. The servo motors 322 drive the corresponding incomplete gear rings 321 to rotate through the drive gears 323 connected to them.

[0046] When machining the screw, the servo motor 322 is started synchronously, which drives the drive gear 323 on it to rotate. The drive gear 323 drives the incomplete gear ring 321 to rotate, which in turn drives the open ring 32 to rotate. When the notch position of the incomplete gear ring 321 rotates to the position of a certain drive gear 323, the drive gear 323 at that position does not bear the power transmission, but maintains a constant speed rotation. Thus, when the incomplete gear ring 321 contacts the drive gear 323 at that position again, it can immediately mesh and transmit power.

[0047] With the three driving gears 323 evenly distributed in the circumferential direction, the incomplete gear ring 321 can always be in contact with two or more driving gears 323, so that the incomplete gear ring 321 maintains a uniform and stable rotation throughout the entire process. Initially, the notch of the C-shaped frame 31 and the opening of the open ring 32 both face the front tool direction, so that the screw workpiece can pass through the C-shaped frame 31 and the open ring 32 and be connected to the spindle of the machine tool 1.

[0048] To ensure stable positioning of the unmachined surfaces of the screw with the abutment arm 33 on different axes, the present invention designs the following structure: (See attached diagram) Figure 2 , Figure 3 , Figure 4 and Figure 5 The abutment arm 33 consists of a wheel frame 331 that slides radially on the open ring 32 and a roller 332 that is rotatably connected to the wheel frame 331. The axis of the roller 332 is perpendicular to the axis of the C-shaped frame 31. Electric cylinders 333 are evenly distributed on the inner side of the open ring 32. A pressure sensor is integrated on the electric cylinder 333. The telescopic section of the electric cylinder 333 is fixedly connected to the corresponding wheel frame 331.

[0049] During rough machining, the electric cylinder 333 pushes the wheel frame 331, causing the wheel frame 331 to drive the rollers 332 against the outer circle of the screw workpiece with a fixed thrust. Thus, even if the screw workpiece is not coaxial, the radial limiting force of each roller 332 is still equal. Furthermore, during rough machining of the screw workpiece, as the follower 2 moves axially, the rollers 332 actually move slowly along a straight line trajectory on the outer circle of the screw workpiece. This allows the electric cylinder 333 to adjust the pushing stroke in real time, ensuring that the thrust applied by each roller 332 to the screw is always equal.

[0050] When the screw is being finished, the threaded grooves on the screw have been machined, dividing the screw into two parts: the screw blades and the screw mandrel. Then, the electric cylinder 333 pushes the roller 332 against the screw again. At this time, whether the roller 332 is against the outer circle of the screw blades or against the outer circle of the screw mandrel, it can push against the screw with the same thrust, ensuring the radial limiting effect of the screw during the finishing process.

[0051] It should be noted that during the finishing of the screw, in order for the tool to always move along the screw's thread groove, the axial movement speed of the tool must match the screw's rotational speed and lead. At this time, the axial speed of the open ring 32 is equal to the movement of the tool. Therefore, to ensure that the roller 332 always abuts against the outer circle of the screw blade, the rotational speed of the open ring 32 is 0. This ensures that the roller 332 can abut against the screw in real time. That is, the roller 332 that originally abutted against the outer circle of the screw mandrel continues to abut against the outer circle of the screw mandrel; the roller 332 that originally abutted against the outer circle of the screw blade continues to abut against the outer circle of the screw blade, ensuring the stability of radial limiting during finishing.

[0052] See Figure 1 , Figure 2 , Figure 3 and Figure 7 The anti-slip mechanism 4 includes two sets of clamping wheels 42 set in the middle of the follower post 2 via a drive assembly 41. The two sets of clamping wheels 42 are arranged vertically and adaptively clamp the screw blade via the drive assembly 41. When finishing the workpiece, the abutment arm 33 always abuts against the screw, and the follower post 2 drives the clamping wheels 42 to follow the axial positioning screw of the tool.

[0053] During the finishing of the screw, the drive assembly 41 moves two sets of vertically arranged clamping wheels 42 closer to each other, so that the clamping wheels 42 extend into the thread groove of the screw, and the two clamping wheels 42 in the same group are located on both sides of the screw blade. Then, the drive assembly 41 controls the two clamping wheels 42 in the same group to move closer to each other, thereby adaptively clamping the screw blade.

[0054] This allows the tool holder 2 to drive the clamping wheel 42 to move synchronously with the tool position during the finishing process, thus providing axial limiting support for the screw workpiece. This achieves tracking axial limiting of the tool's finishing position, effectively preventing the screw from shifting due to the axial push of the tool during the finishing process, ensuring the machining quality of the screw surface. Furthermore, the abutment of the upper and lower clamping wheels 42 prevents the screw from being subjected to unidirectional axial force.

[0055] To facilitate bringing the upper and lower sets of clamping wheels 42 closer together so that they can be inserted into the threaded groove of the screw, the present invention is designed with the following structure: (See attached diagram) Figure 2 , Figure 3 , Figure 6 and Figure 7 The drive assembly 41 includes two base plates 411 that are symmetrically slidably disposed on the tool holder 2. Two sliders 412 slide left and right on the base plates 411. The sliders 412 are rotatably connected to the corresponding clamping wheels 42. A bidirectional lead screw 416 is rotatably disposed on the tool holder 2. The bidirectional lead screw 416 is threadedly connected to the two base plates 411 respectively. A reduction motor 417 that drives the bidirectional lead screw 416 to rotate is fixedly installed on the upper side of the tool holder 2.

[0056] When the screw is precision machined, the geared motor 417 is started to drive the bidirectional lead screw 416 to rotate, so that the bidirectional lead screw 416 drives the two base plates 411 to move closer to each other synchronously. The base plates 411 drive the upper and lower sets of clamping wheels 42 to move closer to each other through the slider 412, so that the clamping wheels 42 are inserted into the thread groove of the screw.

[0057] To enable the clamping wheel 42 to adaptively clamp the blades of the screw, the present invention designs the following structure: (See attached diagram) Figure 3 , Figure 7 and Figure 8 A hydraulic cylinder 413 is fixedly installed on the slider 412 on the left side. The telescopic section of the hydraulic cylinder 413 is fixedly connected to another slider 412 on the same base plate 411.

[0058] When the clamping wheel 42 is inserted into the threaded groove of the screw, the extension section of the hydraulic cylinder 413 is retracted, causing the two sliders 412 on the same base plate 411 to move closer to each other. The sliders 412 drive the corresponding clamping wheels 42 to move synchronously. When one of the clamping wheels 42 abuts against the blade of the screw, it is blocked by the blade and cannot move. At this time, the extension section of the hydraulic cylinder 413 continues, so that the extension section of the hydraulic cylinder 413 alone drives the other slider 412 to move closer to the blade of the screw, until the two clamping wheels 42 are clamped on both sides of the blade of the screw.

[0059] To ensure that after the clamping wheel 42 adaptively clamps onto the screw blade, it is fixedly connected to the follower post 2, thereby preventing axial movement of the screw blade during finishing by limiting the position of the follower post 2 through the clamping wheel 42, the present invention designs the following structure: (See reference) Figure 7 and Figure 8 A locking block 414 is slidably disposed on the front side of the substrate 411. A hydraulic cylinder 415 is fixedly installed on the front side of the substrate 411 to drive the corresponding locking block 414. The rear side of the locking block 414 is rough.

[0060] The extension section of the hydraulic cylinder 415 drives the locking block 414 to move backward, so that the rough surface of the rear side of the locking block 414 abuts against the slider 412, fixing the position of the clamping wheel 42 relative to the tool holder 2. This allows the clamping wheel 42 to accurately limit the axial movement of the screw workpiece when the tool holder 2 moves with the tool.

[0061] Although this invention adds a C-shaped frame 31, an open ring 32, and a clamping wheel 42 to the traditional support structure, slightly increasing the initial investment cost, these initial investments are all one-time investments. Furthermore, by utilizing double-sided limiting and rolling contact during roughing, and axial limiting during finishing, it effectively counteracts tool deformation caused by cutting forces, ensuring the support effect. It also prevents the screw from shifting position due to the axial push of the tool during finishing, ensuring the machining quality of the screw surface. This significantly improves the machining accuracy and surface quality of the screw, extends equipment lifespan, reduces scrap rate, lowers subsequent maintenance costs, and increases production efficiency. It can quickly balance the initial investment and bring long-term stable benefits.

[0062] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to 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 this invention.

[0063] Furthermore, the terms "first," "second," "number one," and "number two" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first," "second," "number one," or "number two" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0064] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0065] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A machining equipment for an extruder screw spindle, comprising a machine tool, wherein the machine tool is equipped with a follower post for auxiliary support of the workpiece, characterized in that, The follower post is equipped with a support mechanism that simultaneously limits the machined and unmachined surfaces of the workpiece, and the follower post is also equipped with an anti-shifting mechanism for axial auxiliary limiting of the workpiece. The support mechanism includes two C-shaped frames arranged symmetrically on the left and right and fixedly installed on the follower post. An open ring is rotatably provided on the inner side of the C-shaped frame, which rotates at the same speed and on the same axis as the workpiece. An abutment arm is provided on the open ring for abutting against the outer side of the workpiece. When rough machining a workpiece, the open ring drives the abutment arm to be centered and abut against the outside of the workpiece and rotate synchronously with the workpiece. The follower post moves synchronously with the tool, causing the abutment arm to roll along the workpiece axis. The anti-slip mechanism includes two sets of clamping wheels set in the middle of the tool holder via a drive assembly. The two sets of clamping wheels are arranged vertically and adaptively clamp the screw blades via the drive assembly. When finishing the workpiece, the abutment arm always abuts against the screw, and the tool holder drives the clamping wheels to follow the tool axially to limit the screw. The screw workpiece is machined by using double-sided limiting and rolling contact during rough machining, and axial limiting during finish machining.

2. The extruder screw spindle processing equipment according to claim 1, characterized in that, Incomplete toothed rings are fixedly installed on the sides of the two open rings that are far apart from each other. Three fixed servo motors are evenly distributed on the outside of the C-shaped frame. The servo motors drive the corresponding incomplete toothed rings to rotate through the drive gears connected to them.

3. The extruder screw spindle processing equipment according to claim 1, characterized in that, The abutment arm consists of a wheel frame that slides radially on an open ring and a roller that is rotatably connected to the wheel frame. The axis of the roller is perpendicular to the axis of the C-shaped frame.

4. The extruder screw spindle processing equipment according to claim 3, characterized in that, Electric cylinders are evenly distributed on the inner side of the open ring. Each electric cylinder integrates a pressure sensor, and the telescopic section of the electric cylinder is fixedly connected to the corresponding wheel frame.

5. The extruder screw spindle processing equipment according to claim 4, characterized in that, During rough machining, the rollers are attached to the outer surface of the workpiece and move along the workpiece axis; during rough and finish machining, the electric cylinder pushes the rollers against the workpiece with a fixed pressure.

6. The extruder screw spindle processing equipment according to claim 1, characterized in that, Initially, the notch of the C-shaped frame and the opening of the open ring both face the direction of the front cutting tool, allowing the screw workpiece to pass through the C-shaped frame and the open ring and connect to the machine tool spindle.

7. The extruder screw spindle processing equipment according to claim 1, characterized in that, The drive assembly includes two base plates that are symmetrically slidably mounted on the tool holder. Two sliders slide left and right on the base plates, and the sliders are rotatably connected to the corresponding clamping wheels.

8. The extruder screw spindle processing equipment according to claim 7, characterized in that, A hydraulic cylinder is fixedly installed on the slider on the left side, and the telescopic section of the hydraulic cylinder is fixedly connected to another slider on the same base plate.

9. The extruder screw spindle processing equipment according to claim 7, characterized in that, A locking block is slidably disposed on the front side of the substrate, and a hydraulic cylinder is fixedly installed on the front side of the substrate to drive the corresponding locking block. The rear side of the locking block is rough.

10. The extruder screw spindle processing equipment according to claim 7, characterized in that, The tool holder is rotatably equipped with a bidirectional lead screw, which is threadedly connected to two base plates respectively. A geared motor that drives the bidirectional lead screw to rotate is fixedly installed on the upper side of the tool holder.

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