Fixtures, fixture methods and their application in the maintenance of twin-screw compressors

Abstract

The present invention relates to the technical field of parts clamping, and discloses a tooling fixture, a tooling method and its application in the maintenance of a twin-screw compressor. The device comprises a supporting mechanism, a grinding mechanism is provided on the top of the supporting mechanism, and a clamping structure is provided inside the supporting mechanism near the grinding mechanism. The supporting mechanism comprises a processing bin, and the inner wall of the processing bin is arranged on one side of the clamping mechanism. The clamping mechanism comprises a driving rod. The present invention controls the clamping block to slide along the surface of a disc toward the center of the disc by arranging the mutual cooperation of components such as a clamping block, a support rod and a grinding sleeve, so that one side of the clamping block will contact with the outer surface of the screw and form a limited state, and then the outer side of the screw is limited for a second time by the mutual cooperation of the support rod and the grinding sleeve, so as to avoid falling off and offset during the maintenance or repair grinding of the screw.

Description

Technical Field

[0001] The invention relates to the technical field of parts clamping, and in particular to a tooling fixture, a tooling method and application thereof in the overhaul of a twin-screw compressor. Background Art

[0002] The development of screw compressors has gone through a long process. In the early days, screw compressor technology was mainly in the hands of enterprises in a few developed countries, and its core technology and the manufacturing process of key components were relatively closed. With the integration of the global economy and the continuous exchange and innovation of technology, the technology of screw compressors has gradually been popularized and developed. When repairing the screw in the screw compressor, a screw compressor screw processing fixture is used.

[0003] Chinese patent application number 202410231873.7 discloses a tooling fixture for screw processing of a screw compressor, including an outer frame, in which brackets are symmetrically arranged front and back inside the outer frame, a clamping fixture for clamping the two ends of the two screws is provided on the side where the two brackets are close to each other, a grinding mechanism for grinding the two screws is provided between the two screws, and a waste collection unit for collecting waste generated during the grinding stage is provided on the lower side of the screw.

[0004] In the above-mentioned prior art, it is found that by relying on the grinding mechanism and the clamping mechanism therein, the matching screws can be processed to the same grinding degree, and the outer profile diameters of the two screws can be the same, thereby ensuring the quality of the screw grinding process. However, during the inspection or repair process of the screw, due to the uneven hardness of the raw material of the screw, the materials in different parts react differently to the cutting force, resulting in uneven local force, which causes deflection and vibration. The vibration and deflection will change the relative position between the tool and the screw, resulting in the inability to obtain the true working state of the screw in the screw compressor and judge its life when repairing the screw, and the inability to ensure the accuracy of the screw grinding repair. Summary of the invention

[0005] The purpose of the present invention is to provide a fixture, a fixture method and their application in the maintenance of a twin-screw compressor to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a tooling fixture, comprising a support mechanism, a grinding mechanism is provided on the top of the support mechanism, the grinding mechanism, a clamping structure is provided inside the support mechanism close to the grinding mechanism, the support mechanism comprises a processing chamber, the inner wall of the processing chamber is arranged on one side of the clamping mechanism, the clamping mechanism comprises a driving rod, a limiting tube is provided on the side of the driving rod away from the processing chamber, a screw is provided inside the limiting tube, a disc is provided at one end of the limiting tube away from the driving rod, and a second electrically controlled push rod is provided on the side of the disc facing the driving rod;

[0007] An air chamber is provided on the outer side of the disc, and a support rod is provided on the side of the disc facing the screw rod, a frosted sleeve is provided on the outer side of the support rod, the outer side of the frosted sleeve is in contact with the outer side of the screw rod, and a torsion spring is provided on the side of the frosted sleeve facing the disc for clamping and limiting the screw rod;

[0008] A clamping block is provided on the side of the disc facing the support rod, a accommodating chamber is provided inside the disc close to the support rod, and the accommodating chamber is communicated with the gas chamber, an electrically controlled gas valve is provided inside the accommodating chamber, and the accommodating chamber and the support rod are communicated with each other through the electrically controlled gas valve.

[0009] Preferably, the number of the clamping blocks is three, and each of the clamping blocks is equidistantly distributed on one side of the disc;

[0010] The number of the support rods and frosted sleeves is set to three, each of the support rods and frosted sleeves is distributed circumferentially on the side of the disc close to the clamping block, and each of the support rods and frosted sleeves is staggered on the side of the disc close to the clamping block, and a micro piezoresistive air pressure sensor is provided inside each of the support rods.

[0011] Preferably, a second electrically controlled slide rail is provided at one end of the position limiting tube close to the driving rod, and the second electrically controlled slide rail is installed on the side of the driving rod facing the position limiting tube, and is used to control the movement of the position limiting tube through the second electrically controlled slide rail, and a first electrically controlled push rod is provided on the side of the driving rod facing the processing chamber, and an end of the first electrically controlled push rod away from the driving rod is arranged on the inner wall of the processing chamber;

[0012] The outer side of the limiting tube is fixedly connected to one end of the second electric control push rod close to the driving rod, and the outer side of the limiting tube is slidably arranged with the inner diameter of the disc, so that the second electric control push rod is controlled to make the disc slide along the outer surface of the limiting tube.

[0013] Preferably, when the support rod is in the initial state, the frosted sleeve located on the outer side of the support rod contacts the outer side of the screw rod, and the frosted sleeve and the outer surface of the screw rod are mutually limited, the gas in the gas chamber does not enter the interior of the support rod through the electric-controlled gas valve, and the support rod is not in an expanded state;

[0014] When the support rod is in working state, the gas in the gas chamber enters into the support rod through the electrically controlled gas valve, the support rod is in an expanded state, the frosted sleeve located on the outer surface of the support rod is in a deformed state, and the outer side of the frosted sleeve contacts and squeezes the screw rod.

[0015] Preferably, a support frame is provided on one side of the inner wall of the processing chamber, an electromagnetic slider is slidably provided on the side of the support frame facing the processing chamber, and a limit plate is provided on the side of the electromagnetic slider away from the support frame, a rotating shaft is provided on one side of the limit plate, and a grinding wheel is fixedly provided on the outer surface of the rotating shaft, and a micro motor is provided on the side of the rotating shaft close to the limit plate;

[0016] There are two limit plates, rotating shafts and grinding wheels. Each limit plate is relatively arranged at the bottom of the electromagnetic slider, and each rotating shaft and grinding wheel is mirror-arranged in the middle area of ​​the two limit plates.

[0017] Preferably, a first electrically controlled slide rail is provided on the side of the limit plate facing the grinding wheel, and a sliding block is provided inside the first electrically controlled slide rail. The side of the sliding block close to the grinding wheel is rotatably connected to the end of the rotating shaft, and a compression spring is provided on one side of the sliding block.

[0018] Preferably, a collecting bin is provided at the bottom of the processing bin, a plurality of through holes are provided at the top of the collecting bin, an air outlet pipe is provided in communication with the inner wall of the collecting bin near the bottom, and the air outlet pipe penetrates the collecting bin and is arranged outside the processing bin, an end of the air outlet pipe away from the processing bin is provided with a conveying pipe, and the other end of the conveying pipe is communicated with an air blowing device, a fixing plate is provided at the top of the air blowing device, and the top of the fixing plate is connected with the outside of the processing bin;

[0019] The inner wall of the processing chamber is provided with a slideway, and the interior of the slideway is slidably connected with the driving rod. The bottom of the processing chamber is provided with a base, and the four corners of the bottom of the base are respectively provided with foot pads.

[0020] A tooling method for a tooling fixture, the specific use steps are as follows:

[0021] S1. First, insert the screw to be repaired into the limit tube in the clamping mechanism, and then control the limit block to move toward the axial direction of the screw, so that the clamping block and the outer surface of the screw contact each other and form a limit state, thereby completing the purpose of clamping and fixing the screw, and then use the support rod and the grinding sleeve to cooperate with each other to fix the outer side of the screw for a second time to avoid the screw from falling off during the inspection or repair grinding process;

[0022] S2. Secondly, the driving rod is controlled by the first electric push rod in the clamping mechanism to move along the inside of the slideway, so that the screws of different lengths can be supported and repaired. In addition, in the process of clamping the screw, the position of the thread grinding on the outer side of the screw is changed by cooperating with the first electric control push rod, so as to facilitate the purpose of cooperating with the grinding mechanism to repair and grind the surface thread. In addition, the position of the limit tube is changed by the second electric control slide rail, so that the distance between the two limit tubes is adjusted and the outer threads of the two screws are meshed with each other, so as to simulate the working state of the two screws in the screw compressor, judge their adaptability to sleep and intuitively check the accuracy difference of the shapes of the two screws, so as to facilitate the purpose of accurate repair through later grinding.

[0023] S3. Finally, the first electrically controlled slide rail in the grinding mechanism cooperates with the transmission of the sliding block to change the outward extension length of the two grinding wheels, and the spacing between the grinding wheels is precisely controlled to adjust the corresponding grinding intensity according to the different states of the screw. In addition, the electromagnetic slider slides horizontally on the side of the support frame facing the processing chamber to achieve the purpose of adjusting the grinding in different areas of the screw according to the inspection results and actual needs.

[0024] The present invention also provides an application of a tooling fixture in the maintenance of a twin-screw compressor, wherein the clamping block and the outer surface of the screw are in contact with each other and form a limiting state, thereby achieving the purpose of clamping and fixing the screw, and then the outer side of the screw is fixed and limited by the cooperation between the support rod and the grinding sleeve, so that the screw will not fall off during maintenance, and the first electric control push rod is controlled to make the drive rod slide along the slideway, so as to adapt to screws of different lengths and control the screw to move laterally to change the grinding position, and at the same time, the position of the limiting tube is adjusted by the second electric control slide rail, so as to adjust the distance between the two screws, and during maintenance, the distance between the two screws can be shortened so that they are always in a state of mutual meshing, so as to observe the working condition of the screw in the screw compressor, intuitively see the maintenance phenomenon and maintenance results, improve the maintenance efficiency, and grind the outer side of the screw according to the maintenance results to increase its service life, thereby reducing the investment cost. The device has a simple structure and is easy to use, and is suitable for use in screw maintenance work.

[0025] Technical effects and advantages of the present invention:

[0026] 1. The present invention controls the clamping block to slide along the surface of the disc toward the center of the disc by setting the mutual cooperation of the clamping block, the support rod and the grinding sleeve. In this way, one side of the clamping block will contact the outer surface of the screw and form a limited state. Then, through the mutual cooperation of the support rod and the grinding sleeve, the outer side of the grinding sleeve is used to perform secondary limiting on the outer side of the screw, thereby avoiding the occurrence of falling off and deviation during the inspection or repair grinding of the screw.

[0027] 2. The present invention achieves the adjustment of the spacing between the two grinding wheels by arranging the mutual cooperation of the grinding wheel, the sliding block and the rotating shaft. The sliding block slides along the inside of the first electrically controlled slide rail. In this way, the cutting force generated when the grinding wheel contacts the outer surface of the screw will also change accordingly, which is convenient for grinding the screw that needs to be re-ground or two corresponding screws with poor matching accuracy according to the inspection results, thereby improving the reusability of the screw and reducing the investment cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0029] Figure 2 It is a top view of the overall structure of the present invention;

[0030] Figure 3 It is a cross-sectional view of the overall structure of the present invention;

[0031] Figure 4 for Figure 3 The enlarged schematic diagram at A in the middle;

[0032] Figure 5 It is a schematic diagram of the disc and related structures of the present invention;

[0033] Figure 6 It is a schematic diagram of the open state of the disc and related structures of the present invention;

[0034] Figure 7 A schematic diagram of the grinding wheel and related structures of the present invention;

[0035] Figure 8 This is a schematic diagram of the distribution of support rods and related structures of the present invention.

[0036] In the figure: 1. supporting mechanism; 101. processing chamber; 102. base; 103. foot pad; 104. fixing plate; 105. blowing device; 106. conveying pipe; 107. collecting chamber; 2. grinding mechanism; 201. supporting frame; 202. limiting plate; 203. grinding wheel; 204. electromagnetic slider; 205. first electric control slide rail; 206. sliding block; 207. rotating shaft; 3. clamping mechanism; 301. driving rod; 302. slideway; 303. limiting tube; 304. screw; 305. first electric control push rod; 306. second electric control push rod; 307. air chamber; 308. disc; 309. clamping block; 310. frosting sleeve; 311. support rod; 312. containing chamber. DETAILED DESCRIPTION

[0037] 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 only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0038] The present invention provides Figures 1 to 8 The tooling fixture shown in the figure comprises a support mechanism 1, a grinding mechanism 2 is arranged on the top of the support mechanism 1, a clamping structure is arranged inside the support mechanism 1 near the grinding mechanism 2, the support mechanism 1 comprises a processing chamber 101, the inner wall of the processing chamber 101 is arranged on one side of the clamping mechanism 3, the clamping mechanism 3 comprises a driving rod 301, a limiting tube 303 is arranged on the side of the driving rod 301 away from the processing chamber 101, a screw 304 is arranged inside the limiting tube 303, a disc 308 is arranged on the end of the limiting tube 303 away from the driving rod 301, a second electric control push rod 306 is arranged on the side of the disc 308 facing the driving rod 301, and the outer surface of the disc 308 is provided with a second electric control push rod 306. An air bin 307 is provided on the side, and a support rod 311 is provided on the side of the disc 308 facing the screw 304, a frosted sleeve 310 is provided on the outer side of the support rod 311, the outer side of the frosted sleeve 310 is in contact with the outer side of the screw 304, a torsion spring is provided on the side of the frosted sleeve 310 facing the disc 308, for clamping and limiting the screw 304, a clamping block 309 is provided on the side of the disc 308 facing the support rod 311, a accommodating bin 312 is provided inside the disc 308 near the support rod 311, and the accommodating bin 312 is communicated with the air bin 307, an electrically controlled gas valve is provided inside the accommodating bin 312, and the accommodating bin 312 and the support rod 311 are communicated with each other through the electrically controlled gas valve.

[0039] like Figure 5 to Figure 6As shown, in order to fix the outer side of the screw 304 during the overhaul or grinding repair process, so as to ensure that when simulating the operation of the two screws 304 meshing with each other in the screw 304 compressor, no accident such as falling off will occur, the number of the clamping blocks 309 is three, each clamping block 309 is equidistantly distributed on one side of the disc 308, the number of the support rods 311 and the frosted sleeve 310 is set to three, each support rod 311 and the frosted sleeve 310 is circumferentially distributed on one side of the disc 308 close to the clamping block 309, and each support rod 311 and the frosted sleeve 310 are staggered on the disc 308. On the side close to the clamping block 309, when in use, the three clamping blocks 309 are controlled to move toward the center of the disc 308, so that the side of the clamping block 309 close to the screw 304 will contact the outer surface of the screw 304 and form a limited state. At the same time, the disc 308 cooperates with the clamping block 309 to clamp the left and right ends of the screw 304 to achieve the position limitation of the screw 304. In addition, the support rod 311 located on the surface of the disc 308 cooperates with the grinding sleeve 310 to achieve secondary limitation of the screw 304, thereby avoiding displacement of the screw 304 during processing and affecting the grinding accuracy.

[0040] like Figures 3 to 6As shown, in order to adjust the distance between the limit tube 303 and the screw 304 according to the area that needs to be ground or repaired, thereby ensuring the grinding accuracy of the outer thread of the screw 304, and at the same time shorten the distance between the two screws 304 so that the two screws 304 mesh with each other, thereby simulating the working state of the screw 304 in the screw 304 compressor to ensure more accurate judgment of its service life, a second electrically controlled slide rail is provided at one end of the limit tube 303 close to the drive rod 301, and the second electrically controlled slide rail is installed on the side of the drive rod 301 facing the limit tube 303, and is used to control the movement of the limit tube 303 through the second electrically controlled slide rail, and a first electrically controlled push rod 305 is provided on the side of the drive rod 301 facing the processing chamber 101, and the end of the first electrically controlled push rod 305 away from the drive rod 301 is arranged on the inner wall of the processing chamber 101, and the outer side of the limit tube 303 and the second electrically controlled push rod 306 are connected to each other. One end close to the driving rod 301 is fixedly connected, and the outer side of the limiting tube 303 is slidably arranged with the inner diameter of the disc 308, so that the second electrically-controlled push rod 306 is controlled to make the disc 308 slide along the outer surface of the limiting tube 303. When in use, the limiting tube 303 is controlled to move laterally along the surface of the driving rod 301 by the second electrically-controlled slide rail, which is mainly used to adjust the distance between the two screws 304 respectively, so as to simulate the operation test of the female rotor and the male rotor in the screw 304 compressor after processing or maintenance. In addition, the second electrically-controlled push rod 306 is controlled to make the disc 308 slide along the outer surface of the limiting tube 303, and at the same time, the disc 308 will extend in the direction of the teeth on the screw 304, so as to achieve the effect of extending the support area, and the driving rod 301 is controlled by the first electrically-controlled push rod 305 to move laterally left and right along the inside of the slideway 302 inside the processing chamber 101.

[0041] When the support rod 311 is in the initial state, the frosted sleeve 310 located on the outside of the support rod 311 contacts with the outside of the screw rod 304, and the frosted sleeve 310 and the outer surface of the screw rod 304 are mutually limited, and the gas in the gas chamber 307 does not enter the inside of the support rod 311 through the electric control gas valve, and the support rod 311 is not in an expanded state. When the support rod 311 is in the working state, the gas in the gas chamber 307 enters the inside of the support rod 311 through the electric control gas valve, and the support rod 311 is in an expanded state. The frosted sleeve 310 located on the outer surface of the support rod 311 is in a deformed state, and the outer side of the frosted sleeve 310 contacts and squeezes the screw rod 304. When in use, during the maintenance or grinding of the screw rod 304, through the cooperation between the clamping block 309, the support rod 311 and the frosted sleeve 310 , and are all fitted to the outer surface of the screw 304 to ensure that it is not easy to fall off or deviate during the inspection or grinding repair of the screw 304. However, due to the uneven internal composition of the screw 304, during the grinding process, materials at different parts react differently after being subjected to the grinding force, causing the screw 304 to deflect and vibrate. As a result, when the screw 304 is inspected or ground, the deflection or vibration of the screw 304 directly and seriously affects the adaptability and shape accuracy of the screw 304. Therefore, by detecting the torsion value of the torsion spring on the grinding sleeve 310, it is determined whether the screw 304 deflects during the inspection or grinding process, and the deflection amount of the screw 304 during the inspection or grinding is reflected according to the torsion value of the torsion spring. The specific steps are as follows:

[0042] When it is detected that the torque value on the torsion spring is within the initial value range, it means that the screw rod 304 has not deflected, and the states of the clamping block 309, the support rod 311 and the frosted sleeve 310 do not need to be adjusted, and the outer side of the screw rod 304 can continue to be clamped and limited.

[0043] It is worth noting that the initial value set for the torsion spring is the torque value when the torsion spring itself is not in a state of force compression. At the same time, when the screw 304 is deflected, the outer side of the frosted sleeve 310 will be transmitted, so that the frosted sleeve 310 applies torque to the torsion spring, and the deflection amount of the screw 304 at this time is recorded by the torsion spring. The material settings of the frosted sleeve 310 and the support rod 311 are both rubber.

[0044] When the torque value detected on the torsion spring is higher than the initial value range, it means that the screw 304 has deflected during maintenance or grinding, and the micro motor on the rotating shaft 207 in the grinding mechanism 2 is controlled to stop grinding, and the gas in the gas chamber 307 will first enter the storage chamber 312 in the disc 308, and then the gas in the storage chamber 312 will be discharged to the inside of the support rod 311 by controlling the electric control gas valve in the C area (see details). Figure 8), and the interior of the support rod 311 in the C area will be filled with gas, and the support rod 311 in the C area will be in an expanded state. The support rod 311 in the expanded state will cause the inner diameter and outer diameter of the frosted sleeve 310 on its outside to change, so as to ensure that the outer side of the frosted sleeve 310 will contact and squeeze the outer side of the screw 304, and at the same time increase the friction between the frosted sleeve 310 and the outer side of the screw 304 in the C area, and buffer the screw 304 in the deflected state. At the same time, the two support rods 311 and the frosted sleeve 310 located in the B area are not in an expanded state, and will not rotate with the screw 304 during the deflection process of the screw 304, so as to achieve the purpose of rubbing its surface to clean the oil stains on its surface. In this state, the clamping block 309 is controlled to move toward the outer side of the disk 308, and when the outer side of the screw 304 is not limited by the clamping block 309, the torsion spring in the C area will record the deflection amount of the screw 304 and release it, and quickly enter the reset state. The grinding sleeve 310 is in a state where the surface of the grinding sleeve 310 in the C area is in contact with the outer side of the screw 304 and is in an extruded state. When the torsion spring on the grinding sleeve 310 is reset, it rotates in the opposite direction of the deflection, and controls the screw 304 to rotate in the opposite direction of the deflection under the transmission of the grinding sleeve 310, thereby achieving the purpose of automatically resetting the deflected screw 304. At this time, during the resetting process of the screw 304, the two support rods 311 in the B area cooperate with the grinding sleeve 310 to complete the secondary cleaning effect, so as to avoid the effect of deflection caused by the presence of oil on the surface of the screw 304. After the resetting is completed, the clamping block 309 is controlled to continue to clamp and limit the outer side of the screw 304, and then the electric control air valve in the C area is controlled to extract the gas in the support rod 311 in the C area to restore it to its initial state, and then the micro motor on the rotating shaft 207 of the grinding mechanism 2 is turned on to control the grinding wheel 203 to grind and repair the screw 304 again.

[0045] When the torque value detected on the torsion spring is seriously higher than the initial value range, it means that the screw 304 is deflected, and the deflection value of the screw 304 is large. At this time, the electric control gas valves in the C area and the B area are controlled to make the gas in the storage chamber 312 in the C area and the B area all rush into the support rods 311 in the C area and the B area, and make the support rods 311 in the C area and the B area in the expansion state at the same time, so that the outer sides of the three frosted sleeves 310 squeeze and limit the outer surface of the screw 304, and increase the three frosted sleeves 310 and the screw The friction force at the contact point of the screw 304 is stored through the torsion spring in each area, and the deflection amount of the screw 304 at this time is stored, and the second electric control push rod 306 is controlled to make the disc 308 move along the outer side of the limit tube 303 toward the direction of the thread on the screw 304. In this process, the disc 308 moves along the surface of the screw 304 and generates friction on the surface of the screw 304 while offsetting the torque of the deflection of the screw 304. When one side of the disc 308 contacts the thread on the screw 304, when the disc 308 contacts the screw 304, the disc 308 contacts the screw 304. 04, it will hinder the moving direction of the disc 308, and at the same time continue to control the second electric control push rod 306 and the outer thread of the screw rod 304 to press the screw rod 304 in the deflected state to make an emergency stop, and control the second electric control push rod 306 again to move the disc 308 in the direction of the drive rod 301 to restore it to its initial position, and then control the clamping block 309 to move slightly in the direction of the outer side of the disc 308 (but still keep in contact with the outer side of the screw rod 304 to avoid the three torsion spring storage A large amount of torque is stored and after being released, the screw 304 falls off due to inertia. When the clamping block 309 limits the screw 304, the three torsion springs release the torque and control the screw 304 to rotate in the opposite direction of the deflection and return to the initial position. After the release and reset work is completed, the micro motor on the rotating shaft 207 of the grinding mechanism 2 is turned on, and the sliding block 206 in the grinding mechanism 2 is controlled to move along the first electric control slide rail 205 toward the middle of the limiting plate 202 to reduce the grinding intensity, and continue to grind the area that needs to be repaired. 。

[0046] In addition, the frosted sleeve 310 is in contact with the screw rod 304 and cooperates with the air pressure state in the support rod 311 to detect whether the screw rod 304 is in a vibrating state during the inspection or grinding process. Since the screw rod 304 will frequently apply pressure to the outside of the frosted sleeve 310 after vibration, the frosted sleeve 310 is tightly connected to the outside of the support rod 311, which will affect the air pressure state in the support rod 311.

[0047] It is worth mentioning that a miniature piezoresistive air pressure sensor is provided on one side of each support rod 311 close to the containing chamber 312 to detect the air pressure state inside the support rod 311. Piezoresistive air pressure sensors are commonly used equipment in the prior art, and are usually installed in various types of confined spaces to monitor the air pressure therein in real time, which will not be elaborated here.

[0048] When the air pressure in the support rod 311 is detected to increase frequently, it means that the screw 304 is in a vibrating state. At this time, the second electric control push rod 306 is controlled to move the disc 308 along the outer surface of the limiting tube 303 toward the outer thread of the screw 304, thereby increasing the limiting area of ​​the screw 304 and reducing the vibration frequency of the screw 304 in the vibrating state. At the same time, the electric control air valves in the C area and the B area are controlled to transport all the gas in the storage chamber 312 in the disc 308 to the support rod 311 in the C area and the B area to expand, thereby limiting the screw 304. 4, in addition, the two first electrically-controlled push rods 305 which are relatively arranged are controlled to push in the central direction of the processing chamber 101 in a uniform manner, so that the limiting tubes 303 located at both ends of the screw 304 are controlled to apply pressure to the screw 304, so as to achieve the effect of eliminating the vibration of the screw 304. If it is detected that the air pressure in the support rod 311 still increases frequently and slightly, the sliding block 206 in the grinding mechanism 2 is controlled to move along the first electrically-controlled slide rail 205 toward the inside of the limiting plate 202, so as to reduce the grinding intensity and avoid the screw 304 from vibrating during grinding and affecting the adaptability and shape accuracy of the screw 304.

[0049] like Figure 4 As shown, in order to determine the area that needs to be repaired according to the detection state of the screw 304, and at the same time adjust the grinding area of ​​the grinding mechanism 2 to be consistent with the area that needs to be ground, so as to ensure high-precision grinding and repair work on the outer thread of the screw 304, a support frame 201 is provided on one side of the inner wall of the processing chamber 101, and an electromagnetic slider 204 is slidably provided on the side of the support frame 201 facing the processing chamber 101, and a limiting plate 202 is provided on the side of the electromagnetic slider 204 away from the support frame 201, and a rotating shaft 207 is provided on one side of the limiting plate 202, and a grinding wheel 203 is fixedly provided on the outer surface of the rotating shaft 207, and the limiting plate 202 and the rotating shaft 20 7 and grinding wheels 203 are both two in number, each limit plate 202 is relatively arranged at the bottom of the electromagnetic slider 204, and each rotating shaft 207 and the grinding wheel 203 are mirror-imaged in the middle area of ​​the two limit plates 202. When in use, the electromagnetic slider 204 is controlled to slide laterally inside one side of the support rod facing the processing chamber 101, so as to adjust the grinding position, thereby facilitating the grinding effect of different parts of the surface of the screw 304. The rotating shaft 207 is controlled by the micro motor on the rotating shaft 207 to rotate along its axis, so that the grinding wheel 203 is rotated, and the purpose of grinding the outer thread of the screw 304 is achieved.

[0050] like Figure 7As shown, in order to detect burrs and impurities in the outer thread of the screw 304 through the grinding mechanism 2 during the inspection process, and control the grinding intensity of the grinding wheel 203 according to the detection data to ensure that the impurities and burrs in the outer thread of the screw 304 can be removed, a first electrically controlled slide rail 205 is provided on the side of the limit plate 202 facing the grinding wheel 203, and a sliding block 206 is provided inside the first electrically controlled slide rail 205. The side of the sliding block 206 close to the grinding wheel 203 is rotatably connected to the end of the rotating shaft 207, and a compression spring is provided on one side of the sliding block 206. When in use, the outer thread of the screw 304 is When the side thread is inspected or ground, the expansion and contraction amount of the compression spring is detected to reflect the burrs or impurities in the surface thread of the screw 304, and the sliding block 206 is controlled to slide along the inside of the first electrically controlled slide rail 205 according to the detected expansion and contraction amount, so that the outer side of the grinding wheel 203 grinds and cleans the area containing burrs and impurities. In addition, with the sliding of the driving rod 301, the outer side of the grinding wheel 203 frequently contacts the area containing burrs or impurities, so as to achieve the purpose of grinding and repairing the outer contour of the screw 304, and avoid poor accuracy or failure to mesh when simulating the mutual meshing of the two screws 304.

[0051] like Figures 1 to 3 As shown, in order to ensure that the outer threads of the screw rod 304 and the two threads have better stability when simulating the working state, the device itself will not shake during the maintenance process. A collecting bin 107 is provided at the bottom of the processing bin 101, and a plurality of through holes are provided on the top of the collecting bin 107. The inner wall of the collecting bin 107 near the bottom is connected to an air outlet pipe, and the air outlet pipe passes through the collecting bin 107 and is arranged on the outside of the processing bin 101. The end of the air outlet pipe away from the processing bin 101 is connected to a delivery pipe 106, and the other end of the delivery pipe 106 is interconnected with the blowing device 105. A fixing plate 104 is provided on the top of the blowing device 105, and the top of the fixing plate 104 is interconnected with the outside of the processing bin 101. A slideway 302 is provided on the inner wall of the processing bin 101, and the interior of the slideway 302 is slidably connected to the driving rod 301. A base 102 is provided at the top, and foot pads 103 are respectively provided at the four corners of the bottom of the base 102. When in use, the impurities in the collecting bin 107 are discharged outwardly through the cooperation between the blowing device 105, the conveying pipe 106 and the air outlet pipe, so as to avoid the grinding debris from accumulating in the collecting bin 107 for a long time and causing pollution. When the blowing device 105 is in working state, the grinding debris will first fall on the top of the collecting bin 107, and then the metal debris on the collecting bin 107 will enter the inside of the collecting bin 107 through the through holes on the surface thereof, and cooperate with the suction force of the blowing device 105 at this time, and the inhaled gas will be discharged to the outside through the air outlet and the drainage of the conveying pipe 106, so as to achieve the cleaning effect, and avoid the metal debris dropped in the grinding or maintenance process from floating in the air for a long time and causing safety hazards to the maintenance personnel.

[0052] A tooling method for a tooling fixture, the specific tooling method steps are as follows:

[0053] S1. First, insert the screw rod 304 to be repaired into the limiting tube 303 in the clamping mechanism 3, and then control the limiting block to move toward the axial direction of the screw rod 304, so that the clamping block 309 and the outer surface of the screw rod 304 contact each other and form a limiting state, thereby completing the purpose of clamping and fixing the screw rod 304, and then use the support rod 311 and the grinding sleeve 310 to cooperate with each other to fix the outer side of the screw rod 304 for a second time to prevent the screw rod 304 from falling off during the repair or repair grinding process;

[0054] S2, secondly, the first electric push rod in the clamping mechanism 3 controls the driving rod 301 to move along the inside of the slideway 302, so that the screws 304 of different lengths can be supported and repaired. In addition, in the process of clamping the screw 304, the position of the thread grinding on the outer side of the screw 304 is changed by cooperating with the first electric control push rod 305, so as to facilitate the purpose of cooperating with the grinding mechanism 2 to repair and grind the surface thread. In addition, the position of the limit tube 303 is changed by the second electric control slide rail, so that by adjusting the spacing between the two limit tubes 303 and making the outer threads of the two screws 304 mesh with each other, the working state of the two screws 304 in the screw 304 compressor is simulated, and its adaptability to sleep is judged and the accuracy difference of the shapes of the two screws 304 is intuitively checked, so as to facilitate the purpose of accurately repairing it through later grinding;

[0055] S3. Finally, the transmission cooperation between the first electrically controlled slide rail 205 and the sliding block 206 in the grinding mechanism 2 changes the outward extension length of the two grinding wheels 203, and the spacing between the grinding wheels 203 is precisely controlled to adjust the corresponding grinding intensity according to the different states of the screw 304. In addition, the electromagnetic slider 204 slides horizontally on the side of the support frame 201 facing the processing chamber 101, so as to achieve the purpose of adjusting the grinding in different areas of the screw 304 according to the inspection results and actual needs.

[0056] The present invention also provides an application of a tooling fixture in the maintenance of a twin-screw 304 compressor, wherein the clamping block 309 contacts the outer surface of the screw 304 and forms a limiting state, thereby achieving the purpose of clamping and fixing the screw 304, and then the support rod 311 and the frosted sleeve 310 cooperate with each other to fix the outer side of the screw 304 for a second time, so that the screw 304 will not fall off during maintenance, and the first electric control push rod 305 is controlled to make the drive rod 301 slide along the slideway 302, so as to adapt to screws 304 of different lengths and control the screw 304 to move horizontally By changing the grinding position and adjusting the position of the limit tube 303 through the second electrically controlled slide rail, the distance between the two screws 304 can be adjusted. During maintenance, the distance between the two screws 304 can be shortened so that they are always in a mutually meshing state, so as to observe the working condition of the screw 304 in the screw 304 compressor, intuitively see the maintenance phenomenon and maintenance results, improve the maintenance efficiency, and grind the outer side of the screw 304 according to the maintenance results to increase its service life and reduce the investment cost. The device has a simple structure and is easy to use, and is suitable for use in the maintenance work of the screw 304.

[0057] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A fixture, comprising a support mechanism (1), a grinding mechanism (2) being provided on the top of the support mechanism (1), and a clamping mechanism (3) being provided inside the support mechanism (1) near the grinding mechanism (2), characterized in that: The support mechanism (1) comprises a processing chamber (101), the inner wall of the processing chamber (101) is arranged on one side of the clamping mechanism (3), the clamping mechanism (3) comprises a driving rod (301), a side of the driving rod (301) away from the processing chamber (101) is provided with a limiting tube (303), a screw rod (304) is arranged inside the limiting tube (303), a disc (308) is arranged at one end of the limiting tube (303) away from the driving rod (301), and a second electrically controlled push rod (306) is arranged on a side of the disc (308) facing the driving rod (301); An air chamber (307) is provided on the outer side of the disc (308), and a support rod (311) is provided on the side of the disc (308) facing the screw rod (304), a frosted sleeve (310) is provided on the outer side of the support rod (311), the outer side of the frosted sleeve (310) is in contact with the outer side of the screw rod (304), and a torsion spring is provided on the side of the frosted sleeve (310) facing the disc (308) for clamping and limiting the screw rod (304); A clamping block (309) is provided on the side of the disc (308) facing the support rod (311); a containing chamber (312) is provided inside the disc (308) close to the support rod (311); the containing chamber (312) is communicated with the gas chamber (307); an electrically controlled gas valve is provided inside the containing chamber (312); and the containing chamber (312) and the support rod (311) are communicated with each other via the electrically controlled gas valve; A support frame (201) is provided on one side of the inner wall of the processing chamber (101); an electromagnetic slider (204) is slidably provided on the side of the support frame (201) facing the processing chamber (101); a limit plate (202) is provided on the side of the electromagnetic slider (204) away from the support frame (201); a rotating shaft (207) is provided on one side of the limit plate (202); a grinding wheel (203) is fixedly provided on the outer surface of the rotating shaft (207); and a micro motor is provided on the side of the rotating shaft (207) close to the limit plate (202); The number of the limit plates (202), the rotating shaft (207) and the grinding wheel (203) is two, each of the limit plates (202) is relatively arranged at the bottom of the electromagnetic slider (204), and each of the rotating shaft (207) and the grinding wheel (203) is mirror-arranged in the middle area of ​​the two limit plates (202); A first electrically controlled slide rail (205) is provided on the side of the limit plate (202) facing the grinding wheel (203), and a sliding block (206) is provided inside the first electrically controlled slide rail (205). The side of the sliding block (206) close to the grinding wheel (203) is rotatably connected to the end of the rotating shaft (207), and a compression spring is provided on one side of the sliding block (206).

2. The fixture according to claim 1, characterized in that: The number of the clamping blocks (309) is three, and each of the clamping blocks (309) is equidistantly distributed on one side of the disc (308) at a circumference; The number of the support rods (311) and the frosted sleeves (310) is set to three, each of the support rods (311) and the frosted sleeves (310) is circumferentially distributed on a side of the disk (308) close to the clamping block (309), and each of the support rods (311) and the frosted sleeves (310) is staggeredly arranged on a side of the disk (308) close to the clamping block (309), and each of the support rods (311) is provided with a micro piezoresistive air pressure sensor inside.

3. The fixture according to claim 2, characterized in that: A second electrically controlled slide rail is provided at one end of the position limiting tube (303) close to the driving rod (301), and the second electrically controlled slide rail is installed on a side of the driving rod (301) facing the position limiting tube (303), and is used to control the movement of the position limiting tube (303) through the second electrically controlled slide rail; a first electrically controlled push rod (305) is provided on a side of the driving rod (301) facing the processing chamber (101); an end of the first electrically controlled push rod (305) away from the driving rod (301) is arranged on the inner wall of the processing chamber (101); The outer side of the position limiting tube (303) is fixedly connected to an end of the second electric control push rod (306) close to the driving rod (301), and the outer side of the position limiting tube (303) is slidably arranged with the inner diameter of the disc (308), so that the second electric control push rod (306) is controlled to make the disc (308) slide along the outer surface of the position limiting tube (303).

4. The fixture according to claim 3, characterized in that: When the support rod (311) is in an initial state, the frosted sleeve (310) located outside the support rod (311) contacts the outside of the screw rod (304), and the frosted sleeve (310) and the outer surface of the screw rod (304) are mutually limited, the gas in the gas chamber (307) does not enter the inside of the support rod (311) through the electric-controlled gas valve, and the support rod (311) is not in an expanded state; When the support rod (311) is in a working state, the gas in the gas chamber (307) enters the support rod (311) through the electrically controlled gas valve, the support rod (311) is in an expanded state, the frosted sleeve (310) located on the outer surface of the support rod (311) is in a deformed state, and the outer side of the frosted sleeve (310) and the screw rod (304) are in contact and squeezed with each other.

5. The fixture according to claim 4, characterized in that: A collecting bin (107) is provided at the bottom of the processing bin (101), a plurality of through holes are provided at the top of the collecting bin (107), an air outlet pipe is provided in communication with the inner wall of the collecting bin (107) near the bottom, and the air outlet pipe passes through the collecting bin (107) and is arranged outside the processing bin (101), an end of the air outlet pipe away from the processing bin (101) is provided with a delivery pipe (106), and the other end of the delivery pipe (106) is communicated with an air blowing device (105), a fixing plate (104) is provided at the top of the air blowing device (105), and the top of the fixing plate (104) is connected to the outside of the processing bin (101); The inner wall of the processing chamber (101) is provided with a slideway (302), and the interior of the slideway (302) is slidably connected to the driving rod (301). The bottom of the processing chamber (101) is provided with a base (102), and the four corners of the bottom of the base (102) are respectively provided with foot pads (103).

6. A fixture method, which is implemented using the fixture as claimed in claim 5, characterized in that: The specific tooling method steps are as follows: S1. First, insert the screw rod (304) to be repaired into the limiting tube (303) in the clamping mechanism (3), then control the clamping block (309) to move toward the axial direction of the screw rod (304), so that the clamping block (309) and the outer surface of the screw rod (304) contact each other and form a limiting state, thereby completing the purpose of clamping and fixing the screw rod (304), and then use the support rod (311) and the grinding sleeve (310) to cooperate with each other to fix the outer side of the screw rod (304) for a second time to prevent the screw rod (304) from falling off during the repair or repair grinding process; S2, secondly, the first electric push rod in the clamping mechanism (3) controls the driving rod (301) to move along the inside of the slideway (302), so that the screws (304) of different lengths can be supported and repaired. In addition, in the process of clamping the screw (304), the first electric push rod (305) cooperates with the screw (304) to change the position of the thread grinding on the outer side of the screw (304), so as to facilitate the purpose of cooperating with the grinding mechanism (2) to repair and grind the surface thread. In addition, the position of the limit tube (303) is changed by the second electric control slide rail, so that the distance between the two limit tubes (303) is adjusted and the outer threads of the two screws (304) are meshed with each other, so as to simulate the working state of the two screws (304) in the screw (304) compressor, judge the use time and intuitively check the accuracy difference of the shapes of the two screws (304), so as to facilitate the purpose of accurately repairing them through later grinding; S3. Finally, the transmission cooperation between the first electrically controlled slide rail (205) and the sliding block (206) in the grinding mechanism (2) is used to change the length of the two grinding wheels (203) extending outward, and the spacing between the grinding wheels (203) is precisely controlled to adjust the grinding intensity according to the different states of the screw (304). In addition, the electromagnetic slider (204) slides horizontally on the side of the support frame (201) facing the processing chamber (101), so as to adjust the grinding in different areas of the screw (304) according to the inspection results and actual needs.

7. Use of the fixture as claimed in claim 5 in the maintenance of a twin-screw compressor.

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