A screw deflection detection device

Abstract

The present invention provides a screw deflection detection device, which belongs to the field of screw detection technology. The invention includes a chassis, a screw to be tested, and a support frame fixedly connected to one side of the chassis, and also includes: a deflection detection component, a marking component, and a surface detection component; the collaborative work of the marking component, the surface detection component, and the deflection detection component constitute a detection system, which can not only detect the deflection of the screw, but also combine the functions of grinding and surface detection; through the grinding seat in the surface detection component, the surface of the screw can be polished during the deflection detection, which not only eliminates the deflection detection error caused by surface contamination, but also can directly repair the screw with slight defects; when the deflection detection component detects that the screw has a deflection change, the marking component will respond quickly and spray the marking liquid directly to the deformation area of ​​the screw; through the combination of the marking component and the surface detection component, not only the detection efficiency is improved, but also the risk of misjudgment and missed judgment is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of screw rod detection, and in particular to a screw rod deflection detection device. Background Art

[0002] The screw of the injection molding machine is an important part of the injection molding machine, which is mainly used to transport, compact, melt, stir and pressurize plastics. During the injection molding process, the screw rotates and moves to transport the plastic raw materials from the feeding section to the melting section and the homogenizing section, and finally completes the plasticization and injection of the plastic. In the injection molding machine, the screw is one of the key components, and its deflection (i.e., the degree of bending) directly affects the plasticization quality and production efficiency of the plastic. Therefore, it is very important to detect and control the deflection of the screw.

[0003] Some current screw deflection detection devices have the following shortcomings when used: First, during the operation of the injection molding machine screw, due to the high temperature and high pressure environment during plastic melting and injection, oil stains are easily attached to the surface. These oil stains not only obscure the true surface morphology of the screw, but may also change the reflection and scattering characteristics of the material, affecting the accuracy of optical or laser-based measurement technology. In addition, impurities, dust or other particulate matter in the plastic raw materials may also adhere to the screw surface, forming local protrusions or depressions, further interfering with the accuracy of deflection measurement; second, existing detection devices can usually only output deflection values ​​or graphs, but cannot directly mark the specific location where the deflection occurs on the screw, which makes it difficult for operators to quickly locate the problem area during the subsequent repair process, which is not only time-consuming and labor-intensive, but may also lead to incomplete or excessive repairs due to misjudgment.

[0004] How to invent a screw deflection detection device to solve these problems has become an urgent problem to be solved by technical personnel in this field. Summary of the invention

[0005] In order to make up for the above shortcomings, the present invention provides a screw deflection detection device, aiming to solve the problems mentioned in the above background.

[0006] The present invention is achieved in that:

[0007] The present invention provides a screw deflection detection device, comprising a chassis, a screw to be measured and a support frame fixedly connected to one side of the chassis, a second motor is arranged inside the chassis, a positioning plate for clamping the screw to be measured is fixedly connected to the end of the second motor, a guide rail is arranged on the support frame, a sliding seat is slidably connected to the guide rail, a placement table for supporting the screw to be measured is fixedly connected to the sliding seat, and further comprising:

[0008] Deflection detection assembly: The deflection detection assembly is arranged on the support frame, and the deflection detection assembly is used to comprehensively detect the deflection of the screw being tested;

[0009] Marking component: the marking component is arranged inside the deflection detection component, and the marking component automatically marks the deformation point of the screw being measured when the deflection of the screw being measured is greater than a preset threshold value;

[0010] Surface detection component: The surface detection component is arranged on the deflection detection component. The surface detection component grinds and detects damage on the surface of the screw rod while performing deflection detection on the screw rod.

[0011] Preferably, the deflection detection assembly includes a first motor, a slide, a slide rod, a connecting plate and a detection seat, a positioning plate is fixedly connected to one side of the first motor, the positioning plate is fixedly connected to the support frame, the output end of the first motor is fixedly connected to a lead screw, the end of the lead screw passes through the side wall of the positioning plate and is rotatably connected to the side wall of the chassis, a lead screw nut is threaded on the lead screw, the lead screw nut is fixed to the slide by a connecting plate, the slide is slidably connected to the guide rail, and the moving speed of the slide matches the rotation speed of the second motor.

[0012] Preferably, the slide bar passes through the middle of the slide table and is slidably connected to the slide table, the lower end of the slide bar is fixedly connected to a card plate, the upper wall of the card plate is fixedly connected to a second spring, the upper end of the second spring is fixedly connected to the slide table, the second spring is sleeved on the outer side of the slide bar, the upper end of the slide table is movably connected to a connecting disk, the top of the connecting disk is fixedly connected to the detection seat, and two slide grooves are symmetrically arranged on the top of the slide table, a limiting rod is fixedly connected to the inside of the slide groove, a first spring is slidably connected to the limit rod, one side of the first spring is elastically connected to the slide groove through a slider, the slider is sleeved on the outer side of the limit rod, one side of the connecting disk is hinged with a connecting rod, and one end of the connecting rod away from the connecting disk is hinged to the upper end of the slide.

[0013] Preferably, the deflection detection assembly also includes a mounting tube, a limit plate, a laser head, a light target and a position-sensitive detector; the lower end of the light target is mounted and connected to the placing table; the laser head is directly opposite to the bull's eye of the light target; a position-sensitive detector is fixedly connected to the light target; the position-sensitive detector is located at the bull's eye; a mounting seat is mounted and connected to the upper end of the detection seat; the laser head is fixedly mounted in the mounting seat; the mounting tube is threadedly connected to the detection seat; an adjusting groove, a liquid storage cavity and a liquid replenishing channel are provided on the mounting tube; the adjusting groove is connected to the liquid storage cavity through the liquid replenishing channel; a reset spring is fixedly connected to the inner wall of the liquid storage cavity; a pressure rod is fixedly connected to the end of the reset spring; and the end of the pressure rod is fixedly connected to the limit plate.

[0014] Preferably, the center of the detection seat in the initial state is colinear with the central axis of the screw to be measured, the detection seat is a rectangular parallelepiped with a through center, the detection seat is sleeved on the outside of the screw to be measured, the limit plate is located in the through area of ​​the detection seat, there is a gap between the limit plate and the edge of the through area of ​​the detection seat and the threaded edge of the screw to be measured, and the adjustment slot is adapted to the wrench.

[0015] Preferably, the marking assembly includes a plurality of liquid outlet channels, the plurality of liquid outlet channels are distributed in a ring along the central axis of the pressure rod, the ends of the liquid outlet channels penetrate the side walls of the pressure rod and the limiting disk, and the liquid outlet channels are sealingly and slidably connected to the inner cavity of the liquid storage cavity.

[0016] Preferably, the liquid replenishment channel and the liquid outlet channel are both single-pass arrangements, a one-way pressure valve is arranged inside the liquid outlet channel close to the limiting disk, and the liquid storage chamber is filled with marking liquid.

[0017] Preferably, the surface detection assembly includes a first grinding seat, a second grinding seat and a detection camera, the first grinding seat and the second grinding seat are both fixedly connected to the limit plate, the detection camera is fixedly installed inside the detection seat, and the lens of the detection camera is opposite to the limit plate.

[0018] Preferably, the number of the first grinding seats is two, the second grinding seat is located between the two first grinding seats, the second grinding seat is fitted with the threaded end face of the measured screw, the end faces of the first grinding seat are respectively fitted with the optical axis segment and the threaded surface of the measured screw, and the structure composed of the first grinding seat and the second grinding seat is adapted to the measured screw.

[0019] Preferably, the end of the liquid outlet channel passes through the side wall of the second grinding seat, and the first grinding seat and the second grinding seat are both made of elastic material.

[0020] The beneficial effects of the present invention are:

[0021] The coordinated work of the marking component, the surface detection component and the deflection detection component constitutes a detection system, which can not only detect the deflection of the screw, but also combine the functions of grinding and surface detection; through the grinding seat in the surface detection component, the surface of the screw can be ground during the deflection detection, ensuring the cleanliness and flatness of the screw surface, not only eliminating the deflection detection error caused by surface contamination, but also directly repairing the screw with slight defects; when the deflection detection component detects that the screw has a deflection change, the marking component will respond quickly and spray the marking liquid directly onto the deformation area of ​​the screw, providing a reliable basis for the subsequent repair or replacement of the screw; at the same time, due to the combined use of the marking component and the surface detection component, the deflection change position of the screw and the surface defects can be intuitively seen during the detection process, which not only improves the detection efficiency, but also reduces the risk of misjudgment and missed judgment;

[0022] In summary, the present application not only overcomes the deficiencies of existing screw deflection detection devices in terms of surface contamination treatment and deflection area marking, but also provides a more complete and efficient solution for the comprehensive evaluation of the screw by integrating multiple functions such as grinding, surface detection and deflection detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 It is a schematic diagram of the overall structure of a screw deflection detection device provided by an embodiment of the present invention;

[0025] Figure 2 It is a partial structural schematic diagram of a screw deflection detection device provided in an embodiment of the present invention;

[0026] Figure 3 It is a structural schematic diagram of a deflection detection assembly of a screw deflection detection device provided in an embodiment of the present invention;

[0027] Figure 4 It is a schematic diagram of the exploded structure of a deflection detection assembly of a screw deflection detection device provided in an embodiment of the present invention;

[0028] Figure 5 It is a schematic cross-sectional structure diagram of a deflection detection component of a screw deflection detection device provided in an embodiment of the present invention;

[0029] Figure 6 It is a schematic diagram of the exploded structure of a marking assembly of a screw deflection detection device provided by an embodiment of the present invention;

[0030] Figure 7 It is a schematic diagram of an exploded cross-sectional structure of a marking component of a screw deflection detection device provided by an embodiment of the present invention;

[0031] Figure 8 It is a schematic structural diagram of a surface detection component of a screw deflection detection device provided by an embodiment of the present invention when in operation.

[0032] In the figure: 1, chassis; 2, positioning plate; 3, support frame; 4, first motor; 5, slide table; 6, slide rod; 7, detection seat; 8, mounting tube; 9, limit plate; 10, screw to be tested; 11, mounting seat; 12, laser head; 13, light target; 14, position sensitive detector; 15, detection camera; 101, second motor; 301, guide rail; 302, slide seat; 303, placement table; 401, lead screw; 402, lead screw nut; 403, positioning plate; 404, connecting plate; 501, slide groove; 502, limit rod; 503, slider; 504, first spring; 601, clamping plate; 602, second spring; 603, connecting plate; 604, connecting rod; 801, adjusting groove; 802, liquid storage chamber; 803, liquid replenishing channel; 901, first grinding seat; 902, second grinding seat; 903, pressure rod; 904, liquid outlet channel; 905, reset spring. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] Embodiment 1, refer to Figure 1-Figure 4 A screw deflection detection device includes a chassis 1, a screw 10 to be tested and a support frame 3 fixedly connected to one side of the chassis 1, a second motor 101 is arranged inside the chassis 1, and a positioning plate 2 for clamping the screw 10 to be tested is fixedly connected to the end of the second motor 101, and the screw 10 to be tested is clamped by the positioning plate 2 to ensure the stable position of the screw during the detection process, a guide rail 301 is arranged on the support frame 3, a sliding seat 302 is slidably connected to the guide rail 301, a placement table 303 for supporting the screw 10 to be tested is fixedly connected to the sliding seat 302, and the sliding seat 302 provides a moving basis for the placement table 303, and also includes:

[0035] Deflection detection assembly: The deflection detection assembly is arranged on the support frame 3, and the deflection detection assembly is used to comprehensively detect the deflection of the screw rod 10 under test;

[0036] Marking component: The marking component is arranged inside the deflection detection component, and the marking component automatically marks the deformation point of the screw rod 10 under test when the deflection of the screw rod 10 under test is greater than a preset threshold value;

[0037] Surface detection component: The surface detection component is arranged on the deflection detection component. The surface detection component grinds and detects damage on the surface of the screw rod 10 to be tested while performing deflection detection on the screw rod 10 to be tested.

[0038] Furthermore, the deflection detection component includes a first motor 4, a slide 5, a slide rod 6, a connecting plate 404 and a detection seat 7. A positioning plate 403 is fixedly connected to one side of the first motor 4, and the positioning plate 403 is fixedly connected to the support frame 3. A lead screw 401 is fixedly connected to the output end of the first motor 4. The end of the lead screw 401 passes through the side wall of the positioning plate 403 and is rotatably connected to the side wall of the chassis 1. A lead screw nut 402 is threadedly connected to the lead screw 401. The lead screw nut 402 is fixed to the slide 5 through the connecting plate 404. The slide 5 is slidably connected to the guide rail 301. The deflection detection component is composed of the first motor 4 Provide power. The motor generates power through rotation, thereby driving the movement of the entire detection system. When the lead screw 401 rotates, the lead screw nut 402 will move along the axial direction of the lead screw 401. The lead screw nut 402 is fixedly connected to the slide 5. Therefore, when the lead screw nut 402 moves, it will drive the slide 5 to slide along the guide rail 301. The guide rail 301 provides a stable moving path for the slide 5 to ensure its accuracy and stability during the movement. The moving speed of the slide 5 matches the rotation speed of the second motor 101. The design of the entire device takes synchronous movement into consideration to ensure the accuracy and stability of the detection.

[0039] It should be noted that: the slide bar 6 runs through the middle of the slide table 5 and is slidably connected to the slide table 5, the lower end of the slide bar 6 is fixedly connected to a card plate 601, the upper wall of the card plate 601 is fixedly connected to a second spring 602, the upper end of the second spring 602 is fixedly connected to the slide table 5, the second spring 602 is sleeved on the outer side of the slide bar 6, the upper end of the slide table 5 is movably connected to a connecting disk 603, the top of the connecting disk 603 is fixedly connected to the detection seat 7, the detection seat 7 can slide in the vertical direction through the arrangement of the second spring 602 and the slide bar 6, and two slide plates are symmetrically arranged on the top of the slide table 5. Groove 501, a limiting rod 502 is fixedly connected inside the slide groove 501, a first spring 504 is slidably connected to the limiting rod 502, one side of the first spring 504 is elastically connected to the slide groove 501 through a slider 503, the slider 503 is sleeved on the outer side of the limiting rod 502, a connecting rod 604 is hinged on one side of the connecting disk 603, one end of the connecting rod 604 away from the connecting disk 603 is hinged to the upper end of the slider 503, through the setting of the connecting rod 604, the slider 503 and the first spring 504, the detection seat 7 can be swung along the direction of the limiting rod 502.

[0040] Furthermore, the deflection detection assembly also includes a mounting tube 8, a limit plate 9, a laser head 12, a light target 13 and a position sensitive detector 14. The lower end of the light target 13 is mounted and connected to the placement table 303. The laser head 12 is directly opposite to the bull's eye of the light target 13. The light target 13 is fixedly connected with the position sensitive detector 14. The position sensitive detector 14 is located at the bull's eye. The laser head 12 emits a laser beam to irradiate the light target 13. The position sensitive detector 14 on the light target 13 can accurately measure the position change of the laser beam on the light target 13. The upper end of the detection seat 7 is mounted and connected with the mounting seat 11. The laser head 12 is fixedly installed in the mounting seat 11. The mounting tube 8 is threadedly connected to the detection seat 7. The mounting tube 8 is provided with an adjustment groove. 801, a liquid storage chamber 802 and a liquid replenishing channel 803, the regulating groove 801 is connected with the liquid storage chamber 802 through the liquid replenishing channel 803, the inner wall of the liquid storage chamber 802 is fixedly connected with a reset spring 905, the end of the reset spring 905 is fixedly connected with a pressure rod 903, the end of the pressure rod 903 is fixedly connected with the limit plate 9, when the measured screw 10 changes its deflection during rotation, its axis will shift, at this time, the offset of the measured screw 10 will squeeze the limit plate 9, thereby pushing the detection seat 7 to shake, accordingly, this shift will cause the position of the laser beam on the optical target 13 to change, and the position sensitive detector 14 can capture this position change in real time and convert it into an electrical signal output;

[0041] It should be noted that: the center of the detection seat 7 in the initial state is colinear with the central axis of the screw rod 10 to be tested, ensuring that the center position of the screw rod is accurately aligned during the detection process. The detection seat 7 is a rectangular parallelepiped with a through center. The detection seat 7 is sleeved on the outside of the screw rod 10 to be tested, which helps to maintain the stability and centering of the screw rod during the detection process. The limit plate 9 is located in the through area of ​​the detection seat 7. There is a gap between the limit plate 9 and the edge of the through area of ​​the detection seat 7 and the thread edge of the screw rod 10 to be tested, ensuring that the limit plate 9 can move within a certain range. When the deflection of the screw rod 10 to be tested changes greatly, the screw rod 10 to be tested will contact the limit plate 9 at this time, and then the movement of the limit plate 9 can drive the detection seat 7 and the laser head 12 thereon to move. The adjustment slot 801 is compatible with the wrench. The wrench is inserted into the adjustment slot 801, and the distance between the limit plate 9 and the screw rod 10 to be tested can be adjusted by turning the wrench, and the measurement accuracy can be adjusted.

[0042] In this embodiment, first, the slide 5 is moved to one end of the guide rail 301 close to the positioning plate 2, then, the screw rod 10 to be measured is passed through the through area of ​​the detection seat 7 and fixed by the positioning plate 2, and then, the slide seat 302 is moved so that the placement table 303 can effectively support the other end of the screw rod 10 to be measured, and the distance between the limit plate 9 and the screw rod 10 to be measured is accurately adjusted by using a wrench through the adjustment slot 801 to ensure that the limit plate 9 can effectively contact the screw rod and transmit the necessary force when the deflection of the screw rod changes; the second motor 101 is started to drive the screw rod 10 to start rotating, and at the same time, the first motor 4 is started, and the movement of the lead screw nut 402 drives the slide 5 to slide smoothly along the guide rail 301, and the detection seat 7 also moves along the axial direction of the screw rod 10 to be measured, and the laser head 12 on the detection seat 7 is always aimed at the center of the optical target 13 and emits a laser beam, and the position sensitive detector 14 records the position information of the laser beam on the optical target 13 in real time;

[0043] During the rotation process, if the axis of the screw rod 10 to be measured deviates (i.e., the deflection changes), the deviated part will squeeze the limit plate 9, and the limit plate 9 transmits this force to the detection seat 7 through the pressure rod 903 and the reset spring 905, causing the detection seat 7 to shake slightly. The shaking of the detection seat 7 will cause the position of the laser beam emitted by the laser head 12 on the light target 13 to change. The position sensitive detector 14 can capture this position change with high precision and convert it into an electrical signal output. The output electrical signal is processed and analyzed by the data processing system, and the deflection value of the screw rod 10 to be measured is obtained by calculation. The processed data can be further stored, displayed or used for other analysis purposes;

[0044] Through the above steps, the deflection detection component can realize the accurate detection of the deflection of the measured screw 10 and provide reliable detection results. Through the precise cooperation of the laser head 12 and the position sensitive detector 14, it can capture and record in real time the slight deflection changes of the measured screw 10 during the rotation process, thereby providing high-precision detection results. The system is designed with the sliding connection between the slide 5 and the guide rail 301, the buffer mechanism between the slide rod 6 and the second spring 602, and the swing mechanism between the connecting rod 604, the slider 503 and the first spring 504, so that the detection seat 7 can flexibly respond to the deflection changes of the screw, whether it is sliding in the vertical direction or swinging in the horizontal direction, it can maintain close contact with the measured screw 10 and accurate detection.

[0045] Example 2, refer to Figure 5-Figure 7 The marking assembly includes a plurality of liquid outlet channels 904, which are distributed in a ring shape along the central axis of the pressure rod 903. The ends of the liquid outlet channels 904 penetrate the side walls of the pressure rod 903 and the limiting plate 9. The liquid outlet channels 904 are sealed and slidably connected to the inner cavity of the liquid storage cavity 802, thereby preventing liquid from leaking out from the connection.

[0046] It should be noted that: the liquid replenishment channel 803 and the liquid outlet channel 904 are both one-way settings to ensure that the marking liquid can only flow in one direction and avoid liquid backflow. A one-way pressure valve is arranged inside the liquid outlet channel 904 near the limit plate 9. When the air pressure in the liquid storage chamber 802 increases, the one-way pressure valve opens, and the liquid storage chamber 802 is filled with marking liquid for marking when the deflection of the measured screw 10 changes. The marking liquid can be selected from solvent-based inks, quick-drying printing inks, etc., which have a fast drying speed and can quickly form a clear and lasting mark on the surface of the screw, which is easy for staff to find. When the limit plate 9 is squeezed by the measured screw 10, at this time, the pressure rod 903 will slide into the liquid storage chamber 802 and reset the spring 905, and the air pressure in the liquid storage chamber 802 will increase accordingly. At this time, the marking liquid is squeezed out through the liquid outlet channel 904 and directly sprayed onto the deformation area of ​​the measured screw 10.

[0047] In this embodiment,

[0048] Initial state: the screw rod 10 to be tested passes through the through area of ​​the testing seat 7 and is fixed by the positioning plate 2. At this time, the liquid storage cavity 802 is filled with the marking liquid, and the liquid outlet channel 904 is in a closed state;

[0049] Start of testing: Start the motor to drive the tested screw 10 to rotate, and start the movement of the slide 5 at the same time. During the testing process, if the tested screw 10 changes its deflection, it will squeeze the limit plate 9;

[0050] Marking process: When the limit plate 9 is squeezed by the screw rod 10 to be measured, the pressure rod 903 will slide into the liquid storage chamber 802 and compress the reset spring 905. As the pressure rod 903 slides, the air pressure in the liquid storage chamber 802 increases accordingly. When the air pressure increases to a certain extent, the one-way pressure valve inside the liquid outlet channel 904 close to the limit plate 9 opens, and the marking liquid is squeezed out through the liquid outlet channel 904 and directly sprayed to the deformation area of ​​the screw rod 10 to mark the deflection change position. The sprayed marking liquid will quickly dry on the screw surface due to its quick-drying characteristics, thereby forming a clearly visible mark. This mark can be used to indicate the deflection change position of the screw rod, which is helpful for subsequent measurement and analysis.

[0051] It should be noted that: since the marking liquid used has the characteristics of fast drying speed, strong adhesion, wear resistance and durability, this marking liquid can quickly dry and form a solid marking layer on the surface of the screw to resist subsequent rotation and friction, and can ensure that the mark formed on the surface of the screw by the marking liquid sprayed after the limit plate 9 is squeezed by the measured screw 10 remains stable during the subsequent rotation;

[0052] End of detection: When the preset detection time is reached or other stop conditions are met, the rotation of the screw rod 10 to be detected and the movement of the slide 5 are stopped, and the detection results are analyzed according to the marking conditions.

[0053] The design of this marking component makes it possible to intuitively mark the deflection change position of the screw rod 10 being tested during the detection process, which is convenient for subsequent analysis and processing and provides a reliable basis for subsequent repair or replacement work. At the same time, through the design of the annularly distributed liquid outlet channel 904 and the one-way pressure valve, accurate marking of the deflection change area of ​​the screw rod 10 being tested is achieved, thereby improving the reliability and accuracy of the detection.

[0054] Example 3, refer to Figure 2-Figure 8 The surface detection assembly includes a first grinding seat 901, a second grinding seat 902 and a detection camera 15. The first grinding seat 901 and the second grinding seat 902 are fixedly connected to the limit plate 9. The detection camera 15 is fixedly installed inside the detection seat 7. The lens of the detection camera 15 is facing the limit plate 9. During the grinding process, the detection camera 15 takes real-time photos of the surface of the screw 10 to be tested and records any potential defects.

[0055] Furthermore, there are two first grinding seats 901, and the second grinding seat 902 is located between the two first grinding seats 901. The second grinding seat 902 fits with the threaded end face of the screw 10 to be measured, and the end face of the first grinding seat 901 fits with the optical axis section and the threaded surface of the screw 10 to be measured, respectively. The structure composed of the first grinding seat 901 and the second grinding seat 902 is adapted to the screw 10 to be measured. Through the above structure, when the limit plate 9 moves with the detection seat 7, at this time, the structure composed of the first grinding seat 901 and the second grinding seat 902 can move along the screw 10 to be measured, and during the movement, the screw 10 to be measured is fully polished, and the defects on the polished screw 10 to be measured are recorded in time through the detection camera 15, thereby improving the detection accuracy;

[0056] It should be noted that the end of the liquid outlet channel 904 passes through the side wall of the second grinding seat 902 to ensure that the marking liquid can be accurately sprayed to the deformation area of ​​the screw rod 10 to be measured. The first grinding seat 901 and the second grinding seat 902 are both made of elastic materials. This design enables the grinding seat to adapt to the shape changes of the screw rod 10 to be measured during the grinding process, provide a more uniform grinding effect, and reduce damage to the screw rod surface.

[0057] In this embodiment, the screw rod 10 to be tested is fixed in the detection system, and the surface detection assembly (including the first grinding seat 901, the second grinding seat 902 and the detection camera 15) is in a standby state. The first grinding seat 901 and the second grinding seat 902 are connected to the detection seat 7 through the limit plate 9 to ensure that they can move with the movement of the detection seat 7. When the detection seat 7 moves under the action of the driving mechanism, the first grinding seat 901 and the second grinding seat 902 also move accordingly. Since the first grinding seat 901 and the second grinding seat 902 are respectively fitted with different parts of the screw rod 10 to be tested, they will produce relative movement on the screw rod surface during the movement;

[0058] In particular, when the deflection of the screw changes, the marking liquid is sprayed to the area where the deflection of the screw changes under the action of the grinding seat and the limit plate 9 (same as above). Due to the quick-drying property, the marking liquid can quickly form a solid marking layer on the surface of the screw, which can reduce the risk of the marking liquid being wiped off or blurred due to the continued movement of the grinding seat. At the same time, the quick-drying marking liquid is also more resistant to subsequent mechanical wear and chemical corrosion.

[0059] During the relative movement, the first grinding seat 901 and the second grinding seat 902 apply a certain pressure to the surface of the screw and remove dirt, oxides or other minor defects on the surface of the screw through the friction of their surfaces. The design of the elastic material enables the grinding seat to adapt to the irregular shape of the screw surface, thereby achieving a uniform and effective grinding effect;

[0060] During the movement, the first grinding seat 901 and the second grinding seat 902 comprehensively grind the screw 10 to remove surface dirt and minor defects and expose potential defect areas. The detection camera 15 takes real-time photos of the screw surface and records the surface conditions before and after grinding. Through image processing technology, the defects, degree of wear and other information on the screw surface can be identified and recorded. For screws with minor defects, this grinding process can achieve basic repair. By removing surface dirt, oxides and minor damage, the original size and shape accuracy of the screw can be restored, and its surface quality and corrosion resistance can be improved, which is crucial to ensuring the performance and reliability of the screw in subsequent use.

[0061] In particular, when the grinding pressure needs to be increased, the operator can use a wrench to move the grinding seat (the first grinding seat 901 and the second grinding seat 902) toward the screw rod 10 to be tested, shortening the distance between the two. This can increase the positive pressure of the grinding seat on the screw rod surface, thereby improving the grinding effect, especially for areas with rough surfaces or serious defects. On the contrary, when the grinding pressure needs to be reduced, the operator can move the grinding seat away from the screw rod 10 to be tested. This can reduce the positive pressure of the grinding seat on the screw rod surface and avoid excessive grinding or damage to the screw rod surface.

[0062] It should be noted that in order to ensure the uniformity and consistency of grinding, it is necessary to synchronously control the rotational movement of the detection seat 7 and the screw rod 10 to be tested. The synchronous control system monitors the rotational position and speed of the detection seat 7 and the screw rod 10 to be tested in real time, and maintains the synchronization relationship between them by adjusting the output of the drive motor. This synchronous control not only improves the grinding efficiency, but also ensures the stability and consistency of the grinding quality.

[0063] For screws with minor defects, this grinding process can achieve basic repair. By removing surface dirt, oxides and minor damage, the original size and shape accuracy of the screw can be restored, and its surface quality and corrosion resistance can be improved. By combining grinding and visual inspection, defects on the surface of the screw 10 under test can be identified more accurately. The design of the first grinding seat 901 and the second grinding seat 902 ensures comprehensive grinding and inspection of the screw 10 under test without omissions. The real-time shooting function of the inspection camera 15 provides a reliable basis for defect recording. Through simple adjustment operations, the grinding pressure can be quickly adjusted to adapt to screws of different materials and defect levels.

[0064] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0065] It should be noted that the specific model and specifications of the motor need to be selected and determined based on the actual specifications of the device, and the specific selection calculation method adopts the existing technology in this field, so it will not be described in detail.

[0066] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A screw deflection detection device, comprising a chassis (1), a screw to be measured (10) and a support frame (3) fixedly connected to one side of the chassis (1), a second motor (101) is arranged inside the chassis (1), a positioning plate (2) for clamping the screw to be measured (10) is fixedly connected to the end of the second motor (101), a guide rail (301) is arranged on the support frame (3), a sliding seat (302) is slidably connected to the guide rail (301), and a placement table (303) for supporting the screw to be measured (10) is fixedly connected to the sliding seat (302), characterized in that: Also includes: Deflection detection component: the deflection detection component is arranged on the support frame (3), and the deflection detection component is used to comprehensively detect the deflection of the screw rod (10) to be tested; The deflection detection assembly comprises a first motor (4), a slide table (5), a slide rod (6), a connecting plate (404) and a detection seat (7); a positioning plate (403) is fixedly connected to one side of the first motor (4); the positioning plate (403) is fixedly connected to the support frame (3); a lead screw (401) is fixedly connected to the output end of the first motor (4); an end of the lead screw (401) passes through the side wall of the positioning plate (403) and is rotatably connected to the side wall of the chassis (1); a lead screw nut (402) is threadedly connected to the lead screw (401); the lead screw nut (402) is connected to the slide table (5) by a connection The slide (5) is slidably connected to the guide rail (301), the slide bar (6) passes through the middle of the slide (5) and is slidably connected to the slide (5), the lower end of the slide bar (6) is fixedly connected to a card plate (601), the upper wall of the card plate (601) is fixedly connected to a second spring (602), the upper end of the second spring (602) is fixedly connected to the slide (5), the second spring (602) is sleeved on the outer side of the slide bar (6), the upper end of the slide (5) is movably connected to a connecting plate (603), and the top of the connecting plate (603) is fixedly connected to the detection seat (7); The deflection detection assembly further comprises a mounting tube (8), a limit plate (9), a laser head (12), a light target (13) and a position sensitive detector (14); the lower end of the light target (13) is mounted and connected to the placement table (303); the laser head (12) is directly opposite to the center of the light target (13); the light target (13) is fixedly connected to the position sensitive detector (14); the position sensitive detector (14) is located at the center of the light target; the upper end of the detection seat (7) is mounted and connected to a mounting seat (11); the laser head (12) is fixedly mounted on the mounting seat (11); In the mounting seat (11), the mounting tube (8) is threadedly connected to the detection seat (7); the mounting tube (8) is provided with an adjusting groove (801), a liquid storage cavity (802) and a liquid replenishing channel (803); the adjusting groove (801) is connected to the liquid storage cavity (802) through the liquid replenishing channel (803); a return spring (905) is fixedly connected to the inner wall of the liquid storage cavity (802); the end of the return spring (905) is fixedly connected to a pressure rod (903); and the end of the pressure rod (903) is fixedly connected to the limit plate (9); Marking component: the marking component is arranged inside the deflection detection component, and the marking component automatically marks the deformation point of the screw rod (10) being tested when the deflection of the screw rod (10) being tested is greater than a preset threshold value; The marking assembly comprises a plurality of liquid outlet channels (904), the plurality of liquid outlet channels (904) are distributed in a ring shape along the central axis of the pressure rod (903), the liquid replenishing channel (803) and the liquid outlet channel (904) are both single-pass arrangements, a one-way pressure valve is arranged inside the liquid outlet channel (904) near the limiting plate (9), and the liquid storage chamber (802) is filled with marking liquid; Surface detection component: the surface detection component is arranged on the deflection detection component, and the surface detection component performs grinding and damage detection on the surface of the screw rod (10) being tested while performing deflection detection on the screw rod (10) being tested; The surface detection assembly comprises a first grinding seat (901), a second grinding seat (902) and a detection camera (15); the first grinding seat (901) and the second grinding seat (902) are both fixedly connected to the limit plate (9); the detection camera (15) is fixedly installed inside the detection seat (7); there are two first grinding seats (901); the second grinding seat (902) is located between the two first grinding seats (901); the second grinding seat (902) is in contact with the threaded end face of the screw (10) to be detected; the end face of the first grinding seat (901) is respectively in contact with the optical axis section and the threaded surface of the screw (10) to be detected; and the structure formed by the first grinding seat (901) and the second grinding seat (902) is compatible with the screw (10) to be detected.

2. A screw deflection detection device according to claim 1, characterized in that: The moving speed of the slide (5) matches the rotation speed of the second motor (101).

3. A screw deflection detection device according to claim 1, characterized in that: Two slide grooves (501) are symmetrically arranged on the top of the slide table (5), and a limit rod (502) is fixedly connected inside the slide groove (501). A first spring (504) is slidably connected to the limit rod (502). One side of the first spring (504) is elastically connected to the slide groove (501) through a slider (503), and the slider (503) is sleeved on the outer side of the limit rod (502). A connecting rod (604) is hinged on one side of the connecting disk (603), and one end of the connecting rod (604) away from the connecting disk (603) is hinged to the upper end of the slider (503).

4. A screw deflection detection device according to claim 1, characterized in that: The center of the detection seat (7) in the initial state is colinear with the central axis of the screw rod (10) to be measured. The detection seat (7) is a rectangular parallelepiped with a through center. The detection seat (7) is sleeved on the outer side of the screw rod (10) to be measured. The limit plate (9) is located in the through area of ​​the detection seat (7). There is a gap between the limit plate (9) and the edge of the through area of ​​the detection seat (7) and the thread edge of the screw rod (10) to be measured. The adjustment groove (801) is adapted to a wrench.

5. A screw deflection detection device according to claim 1, characterized in that: The end of the liquid outlet channel (904) passes through the side wall of the pressure rod (903) and the limiting plate (9), and the liquid outlet channel (904) is sealed and slidably connected to the inner cavity of the liquid storage cavity (802).

6. A screw deflection detection device according to claim 1, characterized in that: The lens of the detection camera (15) is directly opposite to the limiting plate (9).

7. A screw deflection detection device according to claim 1, characterized in that: The end of the liquid outlet channel (904) passes through the side wall of the second grinding seat (902), and the first grinding seat (901) and the second grinding seat (902) are both made of elastic material.

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