Lead screw nut processing device and control method

Abstract

The present application discloses a lead screw nut processing device and a control method. The upper crossbeam assembly is arranged on the base, the retainer assembly is arranged below the upper crossbeam assembly, and the clamping assembly is arranged below the retainer assembly; the lower crossbeam assembly is arranged below the clamping assembly; both ends of the tool shaft in the length direction are detachably fixed to the upper locking part and the lower locking part respectively. The lead screw nut processing device and the control method provided by the present invention realize the fixation of the tool shaft through the cooperation of the upper crossbeam assembly and the lower crossbeam assembly. The independent operation of the upper crossbeam assembly and the lower crossbeam assembly provides greater freedom for the fixation form of the tool shaft and provides a basis for improving the processing efficiency; the distance between the retainer frame and the upper locking part of the upper crossbeam is consistent, ensuring that the retainer can always form a high-quality guiding effect with the tool shaft, limiting the vibration and deformation tendency of the tool shaft, and finally improving the processing accuracy of the lead screw nut.

Description

Technical Field

[0001] The present invention relates to a screw nut processing device, and particularly to a screw nut processing device and a control method. Background Art

[0002] As a core component in the field of mechanical transmission, the screw pair plays a crucial role in intelligent manufacturing fields such as machine tools and automated production lines. With the continuous growth of market demand, the high-speed feed screw pair gradually highlights its high-speed and stable transmission advantages in the field of automated production lines. Among them, the large-lead nut, as an important part of the high-speed feed screw pair, its processing technology is crucial for ensuring the precision and stability of transmission. Therefore, the processing technology of the large-lead nut has become a key link in the manufacturing process of the high-speed feed screw pair.

[0003] To increase the thread lead, there are mainly two strategies: one is to directly increase the thread lead during the processing, and the other is to achieve it by increasing the number of thread starts. From the perspective of the stability of the transmission system, usually the method of increasing the number of thread starts is adopted to achieve the purpose of increasing the nut lead. The increase in the number of thread starts means that for each revolution of the screw, the linear feed of the screw nut will increase accordingly.

[0004] For the processing of the inner raceway of the large-lead nut, traditionally, the forming grinding processing method is mostly used. This method cuts the metal material with a grinding wheel of a specific cross-section to form an inner raceway shape that meets the requirements. However, this processing process is relatively complex, with low efficiency, and during the cutting process, the metal material structure of the screw nut is cut off, and the mechanical properties of the base material are not improved. Especially for small-diameter screw nuts, due to the limited length of the tool inserted, the yield rate of this method is low.

[0005] To overcome the above challenges, the extrusion one-time forming technology is introduced into the processing of large-lead nuts. This technology uses the steel balls embedded in the tool to perform spiral extrusion on the inner side of the nut. By adjusting the embedding depth of the steel balls, the tool is gradually extruded from shallow to deep inside the nut to complete one-time forming. Since the extrusion forming technology does not require material reduction treatment on the nut, it effectively improves the forming quality of the nut and significantly increases the yield rate of small-diameter large-lead nuts. However, currently, the extrusion forming nut cannot achieve coordination in terms of fixing effect and processing efficiency. Summary of the Invention

[0006] The main object of the present invention is to provide a screw nut processing device and a control method, aiming to solve the problem that the current extrusion forming nut device cannot achieve coordination in terms of fixing effect and processing efficiency.

[0007] To achieve the above object, the present invention provides a screw nut processing device, including:

[0008] Base, with multiple optical axes arranged in the length direction;

[0009] Upper crossbeam assembly, arranged on the base and including an upper linear drive and an upper crossbeam. The upper crossbeam is connected to the output end of the upper linear drive and moves in the vertical direction. The lower surface of the upper crossbeam is provided with an upper locking portion;

[0010] Holder assembly, arranged below the upper crossbeam assembly and including a holder frame and a holder arranged on the holder frame. The holder frame is slidably arranged on the optical axis and connected to the output end of the upper linear drive;

[0011] Clamping assembly, arranged below the holder assembly and including a main shaft and a chuck arranged on the main shaft. The main shaft is drivingly connected with a rotary drive;

[0012] Lower crossbeam assembly, arranged below the clamping assembly and including a lower linear drive, a lower crossbeam, and a lower locking portion. The lower crossbeam is driven by the lower linear drive in the vertical direction. The upper surface of the lower crossbeam is provided with a lower locking portion;

[0013] Tool shaft, with both ends in the length direction respectively forming detachable fixation with the upper locking portion and the lower locking portion. Machining heads are arrayed on the outer wall of the tool shaft;

[0014] Processing unit, controlling the operations of the upper linear drive, the rotary drive, the chuck, and the lower linear drive;

[0015] Wherein, the central axes of the holder, the chuck, and the main shaft all penetrate and match the tool shaft.

[0016] Further, first inner grooves are provided on the peripheral walls at both ends of the tool shaft, and second inner grooves matching the first inner grooves are provided on the inner walls of the upper locking portion and the lower locking portion. When the tool shaft is combined with the upper locking portion and the lower locking portion, the first inner grooves and the second inner grooves form a channel structure extending to the outer surfaces of the upper locking portion and the lower locking portion.

[0017] Further, a locking shaft controlled by the processing unit is telescopically arranged corresponding to the channel structure.

[0018] Further, one of the upper linear drive and the lower linear drive is of pneumatic drive type, and the other is of motor drive type.

[0019] Further, the upper locking portion and the lower locking portion are provided with a resisting structure corresponding to the tool shaft in the height direction.

[0020] Further, a manipulator for loading and unloading is provided corresponding to the clamping assembly.

[0021] Further, the retainer includes a plain bearing and a nut portion. The plain bearing is relatively rotationally fixed to a base ring and a mounting ring. The base ring is connected to the retainer frame. The nut portion is mounted on the mounting ring, and the shape of the nut portion corresponds to the tool shaft.

[0022] The present invention provides a control method applied to the above-mentioned lead screw nut processing device, including:

[0023] S1. After receiving the first signal indicating that the upper locking portion and the tool shaft are released, control the lower linear drive to drive the lower crossbeam downward to a first preset position;

[0024] S2. After receiving the second signal indicating that sampling is completed, control the lower linear drive to drive the lower crossbeam upward to a second preset position;

[0025] S3. After receiving the third signal indicating that the upper locking portion and the tool shaft are locked, and receiving the fourth signal indicating that the lower locking portion and the tool shaft are released, control the lower linear drive to drive the lower crossbeam upward to a third preset position;

[0026] S4. After receiving the fourth signal indicating that lofting is completed, control the upper locking portion to drive the lower crossbeam downward to a fourth preset position;

[0027] S5. After receiving the fifth signal indicating that the lower locking portion and the tool shaft are locked, control the lower linear drive and the upper locking portion to move downward until the lower crossbeam reaches the second preset position.

[0028] Further, first inner grooves are provided on the peripheral walls at both ends of the tool shaft, and second inner grooves matching the first inner grooves are provided on the inner walls of the upper locking portion and the lower locking portion. When the tool shaft is combined with the upper locking portion and the lower locking portion, the first inner grooves and the second inner grooves form a channel structure extending to the outer surfaces of the upper locking portion and the lower locking portion. A locking shaft controlled by the processing portion is telescopically provided corresponding to the channel structure. Before the step S1, it includes:

[0029] Control the locking shaft on the upper locking portion to retract;

[0030] Between the step S2 and the step S3, it includes:

[0031] Control the locking shaft on the upper locking portion to extend inward, and control the locking shaft on the lower locking portion to retract;

[0032] Between the step S4 and the step S5, it includes:

[0033] Control the locking shaft on the lower locking portion to extend inward.

[0034] Further, a manipulator for loading and unloading is provided corresponding to the clamping assembly, and the steps of S2 include:

[0035] Receiving a second signal indicating that sampling is completed sent by the manipulator, and controlling the lower linear drive to work to drive the lower crossbeam upward to a second preset position;

[0036] The steps of S4 include:

[0037] Receiving a fourth signal indicating that lofting is completed sent by the manipulator, and controlling the upper locking part to work to drive the lower crossbeam downward to a fourth preset position.

[0038] The screw nut processing device and control method provided by the present invention realize the fixation of the tool shaft through the cooperation of the upper crossbeam assembly and the lower crossbeam assembly. The independent operation of the upper crossbeam assembly and the lower crossbeam assembly provides greater freedom for the fixation form of the tool shaft and provides a basis for improving the processing efficiency; the distance between the retainer frame and the upper locking part of the upper crossbeam is kept consistent, ensuring that the retainer can always form a high-quality guiding effect with the tool shaft, limiting the vibration and deformation tendency of the tool shaft, and ultimately improving the processing accuracy of the screw nut; by changing the size of the tool shaft and adjusting the corresponding mating parts at the same time, the processing of different models of screw nuts can be realized. Description of the Drawings

[0039] Figure 1 is a schematic diagram of a screw nut processing device according to an embodiment of the present invention;

[0040] Figure 2 is a schematic diagram of the main structure of a screw nut processing device according to an embodiment of the present invention in the screw nut processing state;

[0041] Figure 3 is Figure 3 a partial enlarged view of A;

[0042] Figure 4 is Figure 4 a partial enlarged view of B;

[0043] Figure 5 is a schematic diagram of the main structure of a screw nut processing device according to an embodiment of the present invention in the screw nut unloading state;

[0044] Figure 6 is a schematic diagram of the main structure of a screw nut processing device according to an embodiment of the present invention in the screw nut loading state;

[0045] Figure 7 is a schematic diagram of the tool shaft of a screw nut processing device according to an embodiment of the present invention;

[0046] Figure 8It is a schematic diagram of a retainer in a lead screw nut processing device according to an embodiment of the present invention.

[0047] The realization of the purpose of the present invention, its functional characteristics and advantages will be further described with reference to the embodiments and the accompanying drawings. Specific Embodiments

[0048] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0049] Those skilled in the art of the present technology can understand that unless specifically stated, the singular forms "a", "an", "the", "above-mentioned" and "this" used herein may also include the plural forms. It should be further understood that the term "including" used in the description of the present invention means the presence of the described features, integers, steps, operations, elements, units, modules and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, units, modules, components and / or their groups. It should be understood that when we say that an element is "connected" or "coupled" to another element, it can be directly connected or coupled to other elements, or there may also be intermediate elements. In addition, the "connection" or "coupling" used herein may include wireless connection or wireless coupling. The phrase "and / or" used herein includes all or any unit and all combinations of one or more related listed items.

[0050] Those skilled in the art of the present technology can understand that unless otherwise defined, all terms (including technical terms and scientific terms) used herein have the same meaning as the general understanding of those of ordinary skill in the art to which the present invention belongs. It should also be understood that terms such as those defined in a general dictionary should be understood to have a meaning consistent with the meaning in the context of the prior art, and will not be interpreted with an idealized or overly formal meaning unless specifically defined as here.

[0051] Refer to Figures 1 to 8 , in an embodiment of the present invention, a lead screw nut processing device includes:

[0052] A base 100, provided with a plurality of optical axes 110 in the length direction;

[0053] An upper crossbeam assembly 200, disposed on the base 100 and including an upper linear drive and an upper crossbeam 210. The upper crossbeam 210 is connected to the output end of the upper linear drive and moves in the vertical direction. The lower surface of the upper crossbeam 210 is provided with an upper locking portion 220;

[0054] The retainer assembly 300 is disposed below the upper crossbeam assembly 200 and includes a retainer frame 310 and a retainer 320 disposed on the retainer frame 310. The retainer frame 310 is slidably disposed on the optical axis 110 and connected to the output end of the upper linear drive;

[0055] The clamping assembly 400 is disposed below the retainer assembly 300 and includes a main shaft 410 and a chuck 420 disposed on the main shaft 410. The main shaft 410 is drivingly connected to a rotary drive 430;

[0056] The lower crossbeam assembly 500 is disposed below the clamping assembly 400 and includes a lower linear drive, a lower crossbeam 510, and a lower locking portion 520. The lower crossbeam 510 is driven by the lower linear drive in the vertical direction, and a lower locking portion 520 is disposed on the upper surface of the lower crossbeam 510;

[0057] The tool shaft 600 is detachably fixed at both ends in the length direction to the upper locking portion 220 and the lower locking portion 520 respectively. Machining heads are arranged in an array on the outer wall of the tool shaft 600;

[0058] The processing unit controls the operations of the upper linear drive, the rotary drive 430, the chuck 420, and the lower linear drive;

[0059] Wherein, the central axes of the retainer 320, the chuck 420, and the main shaft 410 all penetrate and match the tool shaft 600.

[0060] In the prior art, it is impossible to coordinate the fixing effect and the processing efficiency of the extrusion forming nut.

[0061] In the present invention, the base 100 serves as the overall structural foundation and provides an installation foundation for subsequent related components. A plurality of optical axes 110 are arranged in the length direction of the base 100, and the optical axes 110 are preferably arranged at intervals in the width direction. The optical axes 110 provide a foundation for subsequent components to slide in the vertical direction.

[0062] The upper crossbeam assembly 200 is disposed on the base 100 and includes an upper linear drive and an upper crossbeam 210. The upper crossbeam 210 is connected to the output end of the upper linear drive and moves in the vertical direction. An upper locking portion 220 is disposed on the lower surface of the upper crossbeam 210. The upper locking portion 220 provides a foundation for fixing the subsequent tool shaft 600. The driving mode of the upper linear drive can be pneumatic drive, hydraulic drive, motor drive, etc.

[0063] The retainer assembly 300 is disposed on the base 100 and is located below the upper crossbeam assembly 200. The retainer assembly 300 includes a retainer frame 310 and a retainer 320 disposed on the retainer frame 310. The retainer frame 310 is slidably disposed on the optical axis 110 and is connected to the output end of the upper linear drive. The function of the retainer 320 is to fix the subsequent tool shaft 600. Since there is an extrusion molding head disposed on the tool shaft 600, it is limited that the retainer frame 310 is connected to the output end of the upper linear drive. Finally, the distance between the retainer frame 310 and the upper locking portion 220 of the upper crossbeam 210 is made consistent, ensuring that the retainer 320 can always form an excellent guiding effect with the tool shaft 600. The machining heads on the tool shaft 600 are preferably aligned in the length direction of the tool shaft 600. At this time, it is easy for the retainer 320 and the tool shaft 600 to form a sliding connection in the length direction. Otherwise, there should be a clearance fit between the retainer 320 and the tool shaft 600, or the shape of the retainer 320 should be set.

[0064] The clamping assembly 400 is disposed on the base 100 and is located below the retainer assembly 300. The clamping assembly 400 includes a main shaft 410 and a chuck 420 disposed on the main shaft 410. The main shaft 410 is drivingly connected to a rotary drive 430. When the rotary drive 430 operates, the main shaft 410 is driven to rotate, and the chuck 420 thereon also rotates accordingly. The chuck 420 is used to clamp the lead screw nut raw material 010. Specifically, the working mode of the chuck 420 can be pneumatic clamping or motor clamping.

[0065] The lower crossbeam assembly 500 is disposed on the base 100 and is located below the clamping assembly 400. The lower crossbeam assembly 500 includes a lower linear drive, a lower crossbeam 510, and a lower locking portion 520. The lower crossbeam 510 is driven by the lower linear drive in the vertical direction, and the upper surface of the lower crossbeam 510 is provided with the lower locking portion 520. The driving mode of the lower linear drive can be pneumatic drive, hydraulic drive, motor drive, etc. The two ends of the tool shaft 600 in the length direction are respectively fixedly connected to the upper locking portion 220 and the lower locking portion 520 in a detachable manner. The connection modes of the tool shaft 600 with the upper locking portion 220 and the lower locking portion 520 can be diverse. Even the upper locking portion 220 and the lower locking portion 520 can be set as an automatic chuck type structure, so as to realize the clamping and release of the tool shaft 600. According to different types, the upper linear drive, the rotary drive 430, and the lower linear drive can select a matching reduction device to increase the torque of the output end. The movements of the upper crossbeam 210, the retainer frame 310, and the lower crossbeam 510 on the base 100 can all be provided with a guiding mechanism (such as the optical axis 110), and the guiding mechanisms can also be shared. Specifically, the guiding can be realized in the way of hole-column cooperation.

[0066] The processing unit controls the operations of the linear drive, the rotary drive 430, the chuck 420, and the lower linear drive. The control mode of the specific processing unit can be completed through a preset program in the single-chip microcomputer, or through real-time detection and control by corresponding sensors, or a combination of the two control modes.

[0067] The central axes of the retainer 320, the chuck 420, and the main shaft 410 all penetrate and match the tool shaft 600. For example, the upper end in the length direction of the tool shaft 600 is connected to the upper locking part 220, then sequentially passes through the retainer 320, the chuck 420, and the main shaft 410, and then the lower end in the length direction of the tool shaft 600 is connected to the lower locking part 520.

[0068] During the working process, the process is as follows: Drive the upper crossbeam assembly 200 to a high position (at this time, the tool shaft 600 is fixed to the upper crossbeam assembly 200), and complete the lofting of the lead screw nut raw material 010 in the clamping assembly 400; Drive the upper crossbeam assembly 200 downward, and the tool shaft 600 passes through the lead screw nut raw material 010 and the clamping assembly 400 (when the tool shaft 600 is first installed, it also needs to pass through the retainer assembly 300). The specific driving position should be such that the tool shaft 600 is connected to the lower crossbeam assembly 500; After the tool shaft 600 is connected to the lower crossbeam assembly 500, drive the upper crossbeam assembly 200 and the lower crossbeam assembly 500 downward simultaneously, and start the rotary drive 430 to work, so as to complete the processing of the lead screw nut raw material 010; Disconnect the tool shaft 600 from the upper crossbeam assembly 200, and the lower crossbeam assembly 500 continues to move downward until the tool shaft 600 is separated from the lead screw nut product, and then the sampling action can be completed; After driving the lower crossbeam assembly 500 upward to a position where the tool shaft 600 can be connected to the upper crossbeam assembly 200, connect the tool shaft 600 to the upper crossbeam assembly 200, and then disconnect the tool shaft 600 from the lower crossbeam assembly 500. Repeating the above process can complete the processing process of the lead screw nut. The specific steps are as follows:

[0069] S1. After receiving the first signal indicating that the release of the upper locking part 220 and the tool shaft 600 is completed, control the lower linear drive to drive the lower crossbeam 510 downward to the first preset position. In the previous cycle before this step, the lead screw nut product has been processed. In this step, the tool shaft 600 is moved downward to provide a basis for the removal of the lead screw nut product. S2. After receiving the second signal indicating that the sampling is completed, control the lower linear drive to drive the lower crossbeam 510 upward to the second preset position. In this step, after the sampling is completed, the tool shaft 600 is moved upward again to provide a basis for the connection between the upper end of the tool shaft 600 and the upper crossbeam assembly 200.

[0070] S3. Receive the third signal indicating that the upper locking part 220 is locked with the tool shaft 600, and receive the fourth signal indicating that the lower locking part 520 is released from the tool shaft 600. Control the lower linear drive to drive the lower crossbeam 510 upward to the third preset position. In this step, the tool shaft 600 is only connected to the upper crossbeam assembly 200 and moves upward, providing a basis for the lofting of the lead screw nut raw material 010.

[0071] S4. Receive the fourth signal indicating that the lofting is completed, and control the upper locking part 220 to work to drive the lower crossbeam 510 downward to the fourth preset position. In this step, after the lofting is completed (including being in place and being clamped), the tool shaft 600 moves downward again, providing a basis for reconnecting its lower end to the lower crossbeam assembly 500.

[0072] S5. Receive the fifth signal indicating that the lower locking part 520 is locked with the tool shaft 600, control the lower linear drive and the upper locking part 220 to move downward and control the rotary drive 430 to work until the lower crossbeam 510 reaches the second preset position. In this step, both ends of the tool shaft 600 are fixed and pass through the lead screw nut raw material 010, so that the machining process can be completed.

[0073] Repeating the above steps S1 to S5 can complete the batch and efficient machining of the lead screw nut. The signals indicating the completion of the release / locking of the upper locking part 220 and the tool shaft 600, and the signals indicating the completion of the release / locking of the lower locking part 520 and the tool shaft 600 can be sent manually or by relevant sensors.

[0074] In summary, the fixation of the tool shaft 600 is achieved through the cooperation of the upper crossbeam assembly 200 and the lower crossbeam assembly 500. The independent operation of the upper crossbeam assembly 200 and the lower crossbeam assembly 500 provides greater freedom for the fixation form of the tool shaft 600 and provides a basis for improving the machining efficiency; keeping the distance between the retainer frame 310 and the upper locking part 220 of the upper crossbeam 210 consistent ensures that the retainer 320 can always form a high-quality guiding effect with the tool shaft 600, limiting the vibration and deformation tendency of the tool shaft 600, and ultimately improving the machining accuracy of the lead screw nut; by changing the size of the tool shaft 600 and adjusting the corresponding mating parts at the same time, the machining of lead screw nuts of different models can be realized.

[0075] Refer to Figures 2 to 8, in one embodiment, first inner grooves 610 are provided on the peripheral walls at both ends of the tool shaft 600, and second inner grooves 620 matching the first inner grooves 610 are provided on the inner walls of the upper locking portion 220 and the lower locking portion 520. When the tool shaft 600 is combined with the upper locking portion 220 and the lower locking portion 520, the first inner grooves 610 and the second inner grooves 620 form a channel structure 630 extending to the outer surfaces of the upper locking portion 220 and the lower locking portion 520.

[0076] In this embodiment, considering that during a machining cycle of a lead screw nut, the tool shaft 600 needs to be combined with / separated from the upper locking portion 220 and the lower locking portion 520, a matching structure facilitating separation and combination is introduced. Specifically, the overall shapes of the upper locking portion 220 and the lower locking portion 520 are both cylindrical. The two ends in the length direction of the tool shaft 600 respectively penetrate into the upper locking portion 220 from above and into the lower locking portion 520 from below to form a detachable fixation. First inner grooves 610 are provided on the peripheral walls at both ends in the length direction of the tool shaft 600. Taking the upper end in the length direction of the tool shaft 600 as an example, the number of the first inner grooves 610 is one or two. When there are two, the two first inner grooves 610 are arranged in parallel. Second inner grooves 620 matching the first inner grooves 610 are provided on the inner walls of the upper locking portion 220 and the lower locking portion 520. When the tool shaft 600 is combined with the upper locking portion 220 and the lower locking portion 520, the first inner grooves 610 and the second inner grooves 620 form a channel structure 630 extending to the outer surfaces of the upper locking portion 220 and the lower locking portion 520. A fixed shaft and a fixed ball can be provided corresponding to the channel structure 630, and the locking and releasing of the tool shaft 600 are realized through the installation and disassembly of the fixed shaft and the fixed ball.

[0077] In one embodiment, a locking shaft controlled by the processing portion is telescopically provided corresponding to the channel structure 630.

[0078] In this embodiment, the telescopic structure of the specific locking shaft can be various. For example, a telescopic drive is provided corresponding to the locking shaft, and the locking shaft is connected to the output end of the telescopic drive. The processing portion controls the operation of the telescopic drive. The type of the telescopic drive is preferably pneumatic, which has the advantages of simplicity, convenience and reliability. When the locking shaft extends into the channel structure 630, locking is formed, and when the locking shaft separates from the channel structure 630, releasing is formed. It should be noted that if the upper locking portion 220 and the lower locking portion 520 are set as a chuck-like structure, while the structure and control are complex, the chuck-like structure is likely to cause unnecessary deformation to the tool shaft 600. In this embodiment, the structure of the locking shaft can be greatly simplified while ensuring a low deformation amount.

[0079] In one embodiment, one of the upper linear drive and the lower linear drive is pneumatic drive type, and the other is motor drive type.

[0080] In this embodiment, since only one of the upper linear drive and the lower linear drive needs to provide a strong driving force and high driving accuracy. Then one of the upper linear drive and the lower linear drive is a pneumatic drive type linear drive, and the other is a servo motor type linear drive, which reduces the overall cost on the premise of ensuring accurate driving of the tool shaft 600. In particular, the pneumatic drive type linear drive can provide position adaptability. For example, when there is a situation where the driving strokes of the pneumatic drive type linear drive and the servo motor type linear drive are inconsistent, the accurate position of the servo motor type linear drive can correct the error of the pneumatic drive type linear drive.

[0081] In one embodiment, the upper locking portion 220 and the lower locking portion 520 are provided with a holding structure corresponding to the tool shaft 600 in the height direction.

[0082] In the foregoing embodiment, both the upper locking portion 220 and the lower locking portion 520 can clamp and fix the tool shaft 600. In this embodiment, in order to improve the stability of the tool shaft 600 in the height direction during the working process, the upper locking portion 220 and the lower locking portion 520 are provided with a holding structure corresponding to the tool shaft 600 in the height direction. Then, during the working process, the tool shaft 600 is mechanically clamped by the upper locking portion 220 and the lower locking portion 520 in the height direction, thereby ensuring the stability of the tool shaft 600 in the height direction.

[0083] In one embodiment, a manipulator for loading and unloading is provided corresponding to the clamping assembly 400.

[0084] In this embodiment, considering that during the working process of the tool shaft 600, it does not need to be replaced except when an abnormality occurs, and the work of the tool shaft 600 has been optimized to improve production efficiency, only the feeding and discharging of the lead screw nut raw material 010 and the lead screw nut product are required; therefore, a manipulator is introduced to complete the loading and unloading actions, which improves the automation degree of the entire processing process. Specifically, during use, a two-dimensional sample table can also be set corresponding to the manipulator to realize the regular storage of the lead screw nut raw material 010 and the lead screw nut product.

[0085] Referring to Figure 8 , in one embodiment, the retainer 320 includes a plain bearing 321 and a nut portion 322. The plain bearing 321 is relatively rotationally fixed to a base ring 323 and a mounting ring 324. The base ring 323 is connected to the retainer frame 310. The nut portion 322 is mounted on the mounting ring 324, and the shape of the nut portion 322 corresponds to the tool shaft 600.

[0086] In this embodiment, the retainer 320 is defined such that the internal thread structure of the nut portion 322 is specifically the same as the structure of the final lead screw nut, so that a smooth rotation can be formed between the nut portion 322 and the tool shaft 600. During the working process, when the tool shaft 600 moves upward or downward, the nut portion 322 drives the mounting ring 324 of the plain bearing 321 to rotate. While the retainer 320 does not interfere with the movement of the tool shaft 600, it restricts abnormal conditions such as deformation and vibration of the tool shaft 600.

[0087] In one embodiment, the upper cross beam 210 is slidably disposed on the optical axis 110.

[0088] In this embodiment, the arrangement of the optical axis 110 improves the accuracy of the position of the upper cross beam 210 during the movement process. The number of optical axes 110 can be two, and they are spaced apart in the width direction of the base 100 (which is the length direction of the upper cross beam 210). A linear bearing structure is provided at the mating position of the optical axis 110 and the upper cross beam, thereby enhancing the guiding function of the optical axis 110.

[0089] The present invention also provides a control method, which is applied to the above-mentioned lead screw nut processing device, including:

[0090] S1. After receiving the first signal indicating that the upper locking portion 220 and the tool shaft 600 have completed the release, control the lower linear drive to drive the lower cross beam 510 downward to the first preset position;

[0091] S2. After receiving the second signal indicating that the sampling is completed, control the lower linear drive to drive the lower cross beam 510 upward to the second preset position;

[0092] S3. After receiving the third signal indicating that the upper locking portion 220 and the tool shaft 600 have completed the locking, and receiving the fourth signal indicating that the lower locking portion 520 and the tool shaft 600 have completed the release, control the lower linear drive to drive the lower cross beam 510 upward to the third preset position;

[0093] S4. After receiving the fourth signal indicating that the lofting is completed, control the upper locking portion 220 to work to drive the lower cross beam 510 downward to the fourth preset position;

[0094] S5. After receiving the fifth signal indicating that the lower locking portion 520 and the tool shaft 600 have completed the locking, control the lower linear drive and the upper locking portion 220 to move downward until the lower cross beam 510 reaches the second preset position.

[0095] In this embodiment, in step S1, after receiving the first signal indicating that the upper locking portion 220 and the tool shaft 600 are released, the lower linear drive is controlled to drive the lower cross beam 510 downward to the first preset position. In the previous cycle before this step, the screw nut product has been processed. In this step, the tool shaft 600 is moved downward to provide a basis for the removal of the screw nut product.

[0096] In step S2, after receiving the second signal indicating that the sampling is completed, the lower linear drive is controlled to drive the lower cross beam 510 upward to the second preset position. In this step, after the sampling is completed, the tool shaft 600 is moved upward again to provide a basis for the connection between the upper end of the tool shaft 600 and the upper cross beam assembly 200.

[0097] In step S3, after receiving the third signal indicating that the upper locking portion 220 and the tool shaft 600 are locked, and the fourth signal indicating that the lower locking portion 520 and the tool shaft 600 are released, the lower linear drive is controlled to drive the lower cross beam 510 upward to the third preset position. In this step, the tool shaft 600 is only connected to the upper cross beam assembly 200 and moved upward to provide a basis for the lofting of the screw nut raw material 010.

[0098] In step S4, after receiving the fourth signal indicating that the lofting is completed, the upper locking portion 220 is controlled to drive the lower cross beam 510 downward to the fourth preset position. In this step, after the lofting is completed (including positioning and clamping), the tool shaft 600 is moved downward again to provide a basis for its reconnection with the lower cross beam assembly 500 at its lower end.

[0099] In step S5, after receiving the fifth signal indicating that the lower locking portion 520 and the tool shaft 600 are locked, the lower linear drive and the upper locking portion 220 are controlled to move downward and the rotary drive 430 is controlled to work until the lower cross beam 510 reaches the second preset position. In this step, both ends of the tool shaft 600 are fixed and pass through the screw nut raw material 010, so that the processing process can be completed.

[0100] Repeating the above steps S1 to S5 can complete the batch and efficient processing of screw nuts. The signals indicating the release / locking of the upper locking portion 220 and the tool shaft 600, and the signals indicating the release / locking of the lower locking portion 520 and the tool shaft 600 can be sent manually or by relevant sensors.

[0101] In one embodiment, first inner grooves 610 are provided on the peripheral walls at both ends of the tool shaft 600, and second inner grooves 620 matching the first inner grooves 610 are provided on the inner walls of the upper locking portion 220 and the lower locking portion 520. When the tool shaft 600 is combined with the upper locking portion 220 and the lower locking portion 520, the first inner grooves 610 and the second inner grooves 620 form a channel structure 630 extending to the outer surfaces of the upper locking portion 220 and the lower locking portion 520. A locking shaft controlled by the processing unit is telescopically arranged corresponding to the channel structure 630. Before the step S1, it includes:

[0102] Controlling the outer contraction of the locking shaft on the upper locking portion 220;

[0103] Between the step S2 and the step S3, it includes:

[0104] Controlling the inner extension of the locking shaft on the upper locking portion 220 and the outer contraction of the locking shaft on the lower locking portion 520;

[0105] Between the step S4 and the step S5, it includes:

[0106] Controlling the inner extension of the locking shaft on the lower locking portion 520.

[0107] Compared with the previous embodiment, the upper locking portion 220 and the lower locking portion 520 can be manual; in this embodiment, the operations of the upper locking portion 220 and the lower locking portion 520 are restricted to be automatic. The telescopic structure of the locking shaft can be various. For example, a telescopic drive is provided corresponding to the locking shaft, and the locking shaft is connected to the output end of the telescopic drive. The processing unit controls the operation of the telescopic drive. The type of the telescopic drive is preferably pneumatic, which has the advantages of simplicity, convenience and reliability. When the locking shaft extends into the channel structure 630, locking is formed, and when the locking shaft separates from the channel structure 630, release is formed. By controlling the operation of the locking shaft through the processing unit, the automation degree of the screw-nut processing device is improved.

[0108] In one embodiment, a manipulator for loading and unloading is provided corresponding to the clamping assembly 400. The step S2 includes:

[0109] Receiving a second signal of sampling completion sent by the manipulator, and controlling the lower linear drive to drive the lower cross beam 510 upward to a second preset position;

[0110] The step S4 includes:

[0111] Receiving a fourth signal of lofting completion sent by the manipulator, and controlling the upper locking portion 220 to drive the lower cross beam 510 downward to a fourth preset position.

[0112] In this embodiment, considering that during the operation of the tool shaft 600, it does not need to be replaced except in case of abnormality, and the operation of the tool shaft 600 has been optimized to improve production efficiency. It only needs to feed and unload the lead screw nut raw material 010 and the lead screw nut product. Therefore, a manipulator is introduced to complete the feeding and unloading actions, improving the automation level of the entire processing process. Specifically, during use, a two-dimensional sample table can also be set corresponding to the manipulator to achieve regular storage of the lead screw nut raw material 010 and the lead screw nut product. The cooperation between the manipulator and the upper crossbeam assembly 200 and the lower crossbeam assembly 500 can be directly formed according to a preset program or achieved through a travel switch type sensor.

[0113] In summary, for the lead screw nut processing device and control method provided by the present invention, the fixation of the tool shaft 600 is achieved through the cooperation of the upper crossbeam assembly 200 and the lower crossbeam assembly 500. The independent operation of the upper crossbeam assembly 200 and the lower crossbeam assembly 500 provides a greater degree of freedom for the fixation form of the tool shaft 600, laying a foundation for improving the processing efficiency. The distance between the retainer frame 310 and the upper locking portion 220 of the upper crossbeam 210 is kept consistent, ensuring that the retainer 320 can always form a high-quality guiding effect with the tool shaft 600, limiting the vibration and deformation tendency of the tool shaft 600, and ultimately improving the processing accuracy of the lead screw nut. By changing the size of the tool shaft 600 and adjusting the corresponding mating parts at the same time, the processing of different models of lead screw nuts can be achieved.

[0114] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present invention.

Claims

1. A control method applied to a screw nut processing device, characterized in that: The screw nut processing device comprises: A base (100) is provided with a plurality of optical axes (110) in a length direction; An upper crossbeam assembly (200) is arranged on the base (100) and comprises an upper linear drive and an upper crossbeam (210), wherein the upper crossbeam (210) is connected to an output end of the upper linear drive and moves in a vertical direction, and an upper locking portion (220) is arranged on a lower surface of the upper crossbeam (210); A retainer assembly (300) is arranged below the upper crossbeam assembly (200) and comprises a retainer frame (310) and a retainer (320) arranged on the retainer frame (310), wherein the retainer frame (310) is slidably arranged on the optical axis (110) and connected to an output end of the upper linear drive; A clamping assembly (400) is arranged below the retainer assembly (300) and comprises a main shaft (410) and a chuck (420) arranged on the main shaft (410), wherein the main shaft (410) is drivingly connected to a rotation drive (430); A lower crossbeam assembly (500) is arranged below the clamping assembly (400) and comprises a lower linear drive, a lower crossbeam (510), and a lower locking portion (520); the lower crossbeam (510) is driven by the lower linear drive in a vertical direction, and a lower locking portion (520) is provided on an upper surface of the lower crossbeam (510); The tool shaft (600) has two ends in the length direction which are respectively detachably fixed to the upper locking portion (220) and the lower locking portion (520), and processing heads are arranged in an array on the outer wall of the tool shaft (600); a processing unit, controlling the operation of the upper linear drive, the rotational drive (430), the chuck (420) and the lower linear drive; The retainer (320), the chuck (420), and the central axis of the main shaft (410) all penetrate and match the tool shaft (600). The control method comprises: S1, after receiving a first signal indicating that the upper locking portion (220) and the tool shaft (600) have been released, controlling the lower linear drive to drive the lower beam (510) downward to a first preset position; S2, receiving a second signal indicating that sampling is completed, and controlling the lower linear drive to drive the lower beam (510) upward to a second preset position; S3, receiving a third signal indicating that the upper locking portion (220) and the tool shaft (600) are locked, receiving a fourth signal indicating that the lower locking portion (520) and the tool shaft (600) are released, and controlling the lower linear drive to drive the lower beam (510) upward to a third preset position; S4, receiving a fourth signal indicating that the lofting is completed, and controlling the upper locking portion (220) to drive the lower crossbeam (510) downward to a fourth preset position; S5, receiving a fifth signal indicating that the locking of the lower locking portion (520) and the tool shaft (600) is completed, and controlling the lower linear drive and the upper locking portion (220) to move downward until the lower crossbeam (510) reaches a second preset position.

2. The control method according to claim 1, characterized in that: The peripheral walls at both ends of the tool shaft (600) are provided with first inner grooves (610), and the inner walls of the upper locking portion (220) and the lower locking portion (520) are provided with second inner grooves (620) matching the first inner grooves (610). When the tool shaft (600) is combined with the upper locking portion (220) and the lower locking portion (520), the first inner groove (610) and the second inner groove (620) form a channel structure (630) extending to the outer surface of the upper locking portion (220) and the outer surface of the lower locking portion (520). A locking shaft for controlling the processing portion is telescopically provided corresponding to the channel structure (630), and the step S1 includes: Controlling the locking shaft on the upper locking portion (220) to retract outward; The steps between step S2 and step S3 include: Controlling the locking shaft on the upper locking portion (220) to extend inwards, and controlling the locking shaft on the lower locking portion (520) to retract outwards; The steps between step S4 and step S5 include: Controlling the locking shaft on the lower locking portion (520) to extend inward.

3. The control method according to claim 1, characterized in that: One of the upper linear drive and the lower linear drive is a pneumatic drive type, and the other is a motor drive type.

4. The control method according to any one of claims 1 to 3, characterized in that: The upper locking portion (220) and the lower locking portion (520) are provided with a supporting structure corresponding to the tool axis (600) in the height direction.

5. The control method according to any one of claims 1 to 3, characterized in that: A manipulator for loading and unloading materials is provided corresponding to the clamping assembly (400), and the step S2 comprises: receiving a second signal sent by the robot indicating that sampling is completed, and controlling the lower linear drive to drive the lower beam (510) upward to a second preset position; The steps of S4 include: A fourth signal indicating that the lofting is completed is received from the manipulator, and the upper locking portion (220) is controlled to work to drive the lower crossbeam (510) downward to a fourth preset position.

6. The control method according to any one of claims 1 to 3, characterized in that: The retainer (320) comprises a plane bearing (321) and a nut portion (322); the plane bearing (321) comprises a base ring (323) and a mounting ring (324) that are relatively rotatably fixed; the base ring (323) is connected to the retainer frame (310); the nut portion (322) is mounted on the mounting ring (324); the shape of the nut portion (322) corresponds to the tool shaft (600).

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