Thread screwing machine

Abstract

The utility model discloses a thread screwing machine, and relates to the field of thread assembling equipment. The device comprises a machine tool, a first clamping mechanism, a second clamping mechanism, a displacement sensor, an auxiliary positioning ring and a controller, the first clamping mechanism comprises a rotary driving part, a rotary transmission part and a first pneumatic clamping jaw, and the first pneumatic clamping jaw is rotationally installed at the top of one end of the machine tool in the length direction and is in transmission connection with the output end of the rotary transmission part; the second end of the internal thread part can be clamped at the clamping end of the first pneumatic clamping jaw; the displacement sensor is fixed to the top of the machine tool to measure displacement of the second pneumatic clamping jaw. The auxiliary positioning ring detachably sleeves the outer side wall of the external thread section, and the two ends of the auxiliary positioning ring can abut against the end faces, close to each other, of the circular bead of the optical axis section and the internal thread part so as to assist in positioning the zero position of the displacement sensor before the internal thread part and the external thread part are screwed together; the auxiliary positioning ring is used for assisting in positioning, the distance of a non-screwing section does not need to be measured, errors are reduced, and the precision of measuring the screwing length is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to thread assembly equipment technical field more specifically relates to a thread screwing machine. BACKGROUND

[0002] Thread screwing machine is a kind of mechanical equipment for connecting two threaded components or multiple threaded components by rotating and advancing. The existing thread screwing machine is not easy to control the precision of screwing when screwing, especially the screwing length of threaded part is not easy to control. Although some screwing machines are equipped with displacement sensors to measure the displacement of linear feeding mechanism, the measurement starts from the initial position of linear feeding mechanism, especially for shorter threaded section on longer workpiece, the measurement distance is too long, the error is large, and it is easy to screw insufficiently or excessively, resulting in workpiece damage.

[0003] Therefore, how to provide a thread screwing machine easy to control and high in screwing precision is a problem that those skilled in the art need to solve. SUMMARY

[0004] Therefore, the utility model aims at providing a thread screwing machine to at least solve the problem of insufficient precision of the existing thread screwing machine, easy to screw insufficiently or excessively, resulting in workpiece damage.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0006] A thread screwing machine is used for screwing an inner threaded part and an outer threaded part. The inner threaded part is provided with an inner thread at the first end. The outer threaded part includes an outer threaded section and a light shaft section connected integrally. The outer diameter of the outer threaded section is smaller than that of the light shaft section and can be threadedly connected with the inner thread of the inner threaded part. The thread screwing machine comprises:

[0007] A machine tool, the inner threaded part and the outer threaded part are arranged in the length direction of the machine tool in axial direction;

[0008] A first clamping mechanism, the first clamping mechanism includes a rotary drive part, a rotary transmission part and a first pneumatic clamping jaw. The rotary drive part is installed on one side of the machine tool. The rotary transmission part is transmissionally connected with the output end of the rotary drive part. The first pneumatic clamping jaw is rotationally installed on the top of one end of the machine tool in length direction and is transmissionally connected with the output end of the rotary transmission part. The second end of the inner threaded part can be clamped in the clamping end of the first pneumatic clamping jaw.

[0009] Second clamping mechanism, the second clamping mechanism includes sliding drive part, sliding transmission part and second pneumatic clamping jaw, the sliding drive part is fixed at the top of the other end of the machine tool length direction, the sliding transmission part is transmission connection the output end of the sliding drive part, the second pneumatic clamping jaw is slidably connected in the top of the other end of the machine tool length direction, and with the output end of the sliding transmission part is transmission connection, its clamping end with the clamping end of the first pneumatic clamping jaw is opposite arrangement, the optical axis section of the external thread piece can be clamped in the clamping end of the second pneumatic clamping jaw;

[0010] Displacement sensor, the displacement sensor is fixed on the top of the machine tool to measure the displacement of the second pneumatic clamping jaw;

[0011] Auxiliary positioning ring, the auxiliary positioning ring can be detachably set on the outer side wall of the external thread section, and the two ends thereof can be respectively abutted on the shoulder of the optical axis section and the end face of the internally threaded part close to each other, so as to assist in positioning the zero point position of the displacement sensor before the internally threaded part and the externally threaded part are screwed, and the zero point position is the position of the end face of the auxiliary positioning ring close to one end of the optical axis section after being clamped.

[0012] Controller, the rotary drive part, the first pneumatic clamping jaw, the sliding drive part, the second pneumatic clamping jaw and the displacement sensor are electrically connected to the controller.

[0013] The utility model can realize the beneficial effect: after the internally threaded part and the externally threaded part are clamped and fastened, the auxiliary positioning ring is set on the external thread section before screwing, the controller controls the second clamping mechanism to move towards the internally threaded part until the two ends of the auxiliary positioning ring are respectively abutted on the shoulder end face of the optical axis section and the end face of the internally threaded part, at this time, the distance between the shoulder of the optical axis section and the end face of the internally threaded part is equal to the length of the auxiliary positioning ring, and the position of the shoulder end face of the optical axis section at this time is set as the zero point position measured by the displacement sensor. After the auxiliary positioning ring is disassembled, the screwing work is carried out again, the displacement amount of the second clamping mechanism is calculated from the zero point position, and the internally threaded part and the externally threaded part start to be screwed when the measurement starts, so that it is not necessary to measure the distance of the non-screwing section, the error is reduced, the detection accuracy is improved, the screwing accuracy is facilitated to control, and the situation that the screwing is not enough or is excessive is prevented.

[0014] Further, the rotary transmission part includes a transmission shaft, a driving gear, a driven gear and a synchronous belt, one end of the transmission shaft is transmissionally connected to the output end of the rotary drive part; the driving gear is fixed to the other end of the transmission shaft, the driven gear is rotatably connected to the machine tool above the driving gear and is transmissionally connected to the driving gear through the synchronous belt; and the first pneumatic clamping jaw is transmissionally connected to the driven gear.

[0015] Further, the rotating transmission part further comprises a synchronous belt tensioning wheel, a wheel shaft of the synchronous belt tensioning wheel is arranged in parallel with the axis of the driving gear and is rotatably mounted on the machine tool, and a rolling surface of the synchronous belt tensioning wheel is in rolling connection with a conveying surface of the synchronous belt.

[0016] Further, a torque sensor is arranged, the torque sensor is fixed on the shaft of the transmission shaft and is electrically connected with the controller.

[0017] Further, the sliding driving part comprises a driving motor, a screw rod and a sliding block, the driving motor is fixed on the top of the other end of the machine tool in the length direction and is electrically connected with the controller, the screw rod is arranged along the length direction of the machine tool and is drivingly connected with the driving motor at one end and is rotatably connected with the machine tool at the other end, the sliding block is drivingly connected with the screw rod, and the sliding transmission part is mounted on the top of the sliding block.

[0018] Further, the sliding transmission part comprises a sliding rail and a sliding seat, the sliding rail is arranged along the length direction of the machine tool and is fixed on the top of the machine tool, the sliding seat is fixed on the top of the sliding block and is slidingly connected with the sliding rail, and the second pneumatic clamping jaw is fixed on the top of the sliding seat.

[0019] Further, the second clamping mechanism further comprises a buffer assembly, the buffer assembly comprises two supports, a guide rod and two springs, the two supports are arranged along the length direction of the machine tool and are fixed on the bottom of the sliding seat, the guide rod is arranged along the length direction of the machine tool and is connected with the two supports at two ends respectively, the sliding block is slidingly connected with the middle part of the guide rod, and the two springs are sleeved on the rod body of the guide rod between the two supports and the sliding block respectively.

[0020] Further, a material conveying mechanism is arranged, the material conveying mechanism comprises a material conveying driving part, a material conveying table, a feeding support and a discharging support, the material conveying driving part is fixed on the side wall of the machine tool and is electrically connected with the controller, the material conveying table is fixed on the output end of the material conveying driving part so as to slide along the width direction of the machine tool between the first pneumatic clamping jaw and the second pneumatic clamping jaw under the driving of the material conveying driving part, and the feeding support and the discharging support are arranged on the top of the material conveying table along the width direction of the machine tool.

[0021] Further, the feeding support comprises a feeding table, an inner threaded part bracket and an outer threaded part bracket, the inner threaded part bracket and the outer threaded part bracket are arranged in parallel along the length direction of the machine tool and are mounted on the top of the feeding table and have the same structure, and each of the inner threaded part bracket and the outer threaded part bracket comprises a first support, a roller and a first supporting plate, the first support and the first supporting plate are arranged in parallel along the length direction of the machine tool and are fixed on the top of the feeding table, the roller is rotatably arranged on the top of the first support, and the top of the first supporting plate is provided with a first arc-shaped clamping groove penetrating along the length direction of the machine tool.

[0022] Further, the discharging support comprises a discharging table and two second supporting plates arranged in parallel along the length direction of the machine tool, and each of the second supporting plates is provided with a second arc-shaped clamping groove penetrating along the length direction of the machine tool.

[0023] According to the technical scheme, compared with the prior art, the screwing machine has the following beneficial effects:

[0024] 1. The auxiliary positioning ring is used for auxiliary positioning, the distance of the non-screwing section does not need to be measured, the error is reduced, and the accuracy of the measurement of the screwing length is improved.

[0025] 2. The torque sensor is arranged to measure the torque during screwing, so that the screwing speed of the inner threaded part can be adjusted, the torque during screwing can be controlled, and over-screwing is prevented.

[0026] 3. The buffer assembly is arranged to prevent rigid collision between the second clamping mechanism and the machine tool or other parts during sliding, so as to play a flexible buffering role and avoid damage to the device.

[0027] 4. The feeding mechanism is used to automatically feed and discharge, so that the feeding and discharging are facilitated, automatic control is realized, the feeding and discharging time is reduced, and the safety of production is improved. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed in the following embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are only embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of the provided drawings.

[0029] Figure 1 A structural schematic view of the screwing machine is provided.

[0030] Figure 2 A structural schematic view of the first clamping mechanism is provided.

[0031] Figure 3 The second clamping mechanism provided by the utility model has the advantages of simple structure, convenient operation, high efficiency and high accuracy.

[0032] Figure 4 The feeding mechanism provided by the utility model has the advantages of simple structure, convenient operation, high efficiency and high accuracy.

[0033] Figure 5 The controller provided by the utility model has the advantages of simple structure, convenient operation, high efficiency and high accuracy.

[0034] Figure 6 The working state structure schematic view of the screw thread screwing machine provided by the utility model has the advantages of simple structure, convenient operation, high efficiency and high accuracy.

[0035] Figure 7 The working state structure schematic view of the screw thread screwing machine provided by the utility model has the advantages of simple structure, convenient operation, high efficiency and high accuracy.

[0036] Figure 8 The working state structure schematic view of the screw thread screwing machine provided by the utility model has the advantages of simple structure, convenient operation, high efficiency and high accuracy.

[0037] Figure 9 The working state structure schematic view of the screw thread screwing machine provided by the utility model has the advantages of simple structure, convenient operation, high efficiency and high accuracy.

[0038] Figure 10 The working state structure schematic view of the screw thread screwing machine provided by the utility model has the advantages of simple structure, convenient operation, high efficiency and high accuracy.

[0039] Figure 11 The working state structure schematic view of the screw thread screwing machine provided by the utility model has the advantages of simple structure, convenient operation, high efficiency and high accuracy.

[0040] Figure 12 The working state structure schematic view of the screw thread screwing machine provided by the utility model has the advantages of simple structure, convenient operation, high efficiency and high accuracy.

[0041] Figure 13 The working state structure schematic view of the screw thread screwing machine provided by the utility model has the advantages of simple structure, convenient operation, high efficiency and high accuracy.

[0042] In the drawing:

[0043] 1, machine tool;

[0044] 2, first clamping mechanism, 21, rotary drive part, 22, transmission shaft, 23, driving gear, 24, driven gear, 25, synchronous belt, 26, synchronous belt tension pulley, 27, first centering assembly, 271, first centering seat, 272, first centering shaft;

[0045] 3. Second clamping mechanism, 31, sliding drive part, 311, drive part, 312, screw, 313, sliding block, 32, sliding transmission part, 321, sliding rail, 322, sliding seat, 33, second pneumatic clamping jaw, 34, buffer assembly, 341, support, 342, guide rod, 343, spring; 35, second centering assembly, 351, second centering seat, 352, second centering shaft;

[0046] 4. Displacement sensor;

[0047] 5. Auxiliary positioning ring;

[0048] 6. Controller, 61, display screen, 62, function key;

[0049] 7. Torque sensor;

[0050] 8. Feeding mechanism, 81, feeding table, 82, feeding support, 821, feeding table, 822, first support, 823, roller, 824, first supporting plate, 83, discharging support, 831, discharging table, 832, second supporting plate;

[0051] 10. Internal threaded part, 20, external threaded part, 30, screwing part. DETAILED DESCRIPTION

[0052] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0053] In the description of the utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0054] In the utility model, unless another definite provision and limitation, the terms "mount", "link", "connect", "fix" and so on terms should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electrical connection;Can be direct connection, also can indirectly connect through intermediate medium, can be two element internal communication or two element mutual action relationship.For ordinary skilled person in the art, the above terms can be understood according to the specific meaning in the utility model.

[0055] Please refer to Figures 1-13 The utility model discloses a screwing machine for screwing inner thread piece 10 and outer thread piece 20, and the inner thread piece 10 is provided with inner thread at the first end, and the outer thread piece 20 comprises integrally connected outer thread section and light shaft section, and the outer diameter of the outer thread section is smaller than that of the light shaft section and can be threadedly connected with the inner thread of the inner thread piece 10.

[0056] The screwing machine comprises a machine tool 1, a first clamping mechanism 2, a second clamping mechanism 3, a displacement sensor 4, an auxiliary positioning ring 5 and a controller 6, and the inner thread piece 10 and the outer thread piece 20 are arranged in the length direction of the machine tool 1 in the axial direction.

[0057] The first clamping mechanism 2 comprises a rotary driving part 21, a rotary transmission part and a first pneumatic clamping jaw, the rotary driving part 21 is installed on one side of the machine tool 1, the rotary transmission part is transmissionally connected with the output end of the rotary driving part 21, the first pneumatic clamping jaw is rotationally installed on the top of one end of the machine tool 1 in the length direction and is transmissionally connected with the output end of the rotary transmission part, and the second end of the inner thread piece 10 can be clamped on the clamping end of the first pneumatic clamping jaw.

[0058] The second clamping mechanism 3 comprises a sliding driving part 31, a sliding transmission part 32 and a second pneumatic clamping jaw 33, the sliding driving part 31 is fixed on the top of the other end of the machine tool 1 in the length direction, the sliding transmission part 32 is transmissionally connected with the output end of the sliding driving part 31, the second pneumatic clamping jaw 33 is slidingly connected on the top of the other end of the machine tool 1 in the length direction and is transmissionally connected with the output end of the sliding transmission part 32, and the clamping end of the second pneumatic clamping jaw 33 is arranged opposite to the clamping end of the first pneumatic clamping jaw, and the light shaft section of the outer thread piece 20 can be clamped on the clamping end of the second pneumatic clamping jaw 33.

[0059] The displacement sensor 4 is a grating ruler, which is fixed on the top of the machine tool 1 to measure the displacement of the second pneumatic clamping jaw 33.

[0060] The auxiliary positioning ring 5 is detachably sleeved on the outer sidewall of the outer threaded section and the two ends thereof can abut against the end face of the shoulder of the optical axis section and the end face of the inner threaded member 10 close to each other, so as to assist in positioning the zero position of the displacement sensor 4 before the inner threaded member 10 and the outer threaded member 20 are screwed, and the zero position is the position of the end face of the shoulder of the optical axis section when the auxiliary positioning ring 5 is clamped, i.e. when the two ends thereof abut against the end face of the shoulder of the optical axis section and the end face of the inner threaded member 10 close to each other.

[0061] The rotation driving part 21, the first pneumatic clamping jaw, the sliding driving part 31, the second pneumatic clamping jaw 33 and the displacement sensor 4 are electrically connected with the controller 6.

[0062] The screwing machine of the embodiment can assist in positioning and zero setting by the auxiliary positioning ring 5 before screwing, so as to measure the displacement amount of the screwing section of the second clamping mechanism 3, improve the detection precision, facilitate the control of the screwing precision and prevent insufficient screwing or over-screwing.

[0063] Specifically, the rotation transmission part comprises a transmission shaft 22, a driving gear 23, a driven gear 24 and a synchronous belt 25, one end of the transmission shaft 22 is transmissionally connected with the output end of the rotation driving part 21; the driving gear 23 is fixed on the other end of the transmission shaft 22, the driven gear 24 is rotationally connected on the machine tool 1 above the driving gear 23 and is transmissionally connected with the driving gear 23 through the synchronous belt 25; the first pneumatic clamping jaw is transmissionally connected with the driven gear 24. The rotation driving part 21 comprises a servo motor and a speed reducer, and the controller 6 controls the rotation driving part 21 to reverse, thereby driving the first pneumatic clamping jaw to reverse for screwing or unscrewing.

[0064] The inner threaded member 10 is a nut with inner threads on the whole inside or a hollow pipe with inner threads only at the first end, and when it is a hollow pipe, a first centering assembly 27 is further arranged, the first centering assembly 27 comprises a first centering seat 271 and a first centering shaft 272, the first centering seat 271 is fixed on the side of the first pneumatic clamping jaw away from the second pneumatic clamping jaw 33, the first centering shaft 272 is coaxially arranged with the first pneumatic clamping jaw and one end thereof is fixed on the first centering seat 271 and the other end thereof extends to the first pneumatic clamping jaw. An optical sensor is installed on the first centering seat 271 for monitoring whether the inner threaded member 10 is installed in place. The inner threaded member 10 passes through the hollow shaft of the first pneumatic clamping jaw and is rotationally sleeved on the first centering shaft 272 and can abut against the end face of the first centering seat 271, thereby ensuring that the inner threaded member 10 is coaxially arranged with the first pneumatic clamping jaw and strengthening the stability of clamping of the inner threaded member 10.

[0065] More specifically, the first clamping mechanism 2 further comprises a synchronous belt tensioning wheel 26, the wheel shaft of the synchronous belt tensioning wheel 26 is parallelly arranged with the axis of the driving gear and is rotationally installed on the machine tool 1, the rolling surface thereof is rollingly connected with the surface of the synchronous belt 25, and different outer diameters of the synchronous belt tensioning wheel 26 can be replaced to adjust the tensioning degree of the synchronous belt 25.

[0066] Specifically, the torque sensor 7 is fixed on the shaft of the transmission shaft 22 and electrically connected to the controller 6. The load torque can be monitored in real time, and the movement speed of the servo motor can be controlled at any time according to the monitored data, thereby indirectly controlling the output torque of the first pneumatic clamp jaw and driving the internal threaded part 10 to rotate.

[0067] Specifically, the sliding drive part 31 includes a drive motor 311, a lead screw 312, and a sliding block 313. The drive motor 311 is fixed on the top of the other end of the length direction of the machine tool 1 and is electrically connected to the controller 6. The lead screw 312 is arranged along the length direction of the machine tool 1 and is drivingly connected at one end to the drive motor 311 and at the other end to the machine tool 1. The sliding block 313 is drivingly connected to the lead screw 312, and the sliding transmission part 32 is fixed on the top of the sliding block 313. The lead screw transmission is easy to control and has high movement precision. The second pneumatic clamp jaw 33 moves along the length direction of the machine tool 1 under the drive of the sliding drive part 31, and the advancing work of the external threaded part 20 is completed.

[0068] More specifically, the sliding transmission part 32 includes a sliding rail 321 and a sliding seat 322. The sliding rail 321 is arranged along the length direction of the machine tool 1 and is fixed on the top of the machine tool 1. The sliding seat 322 is fixed on the top of the sliding block 313 and is slidingly connected to the sliding rail 321. The second pneumatic clamp jaw 33 is fixed on the top of the sliding seat 322.

[0069] Specifically, referring to Figure 3 The second clamping mechanism 3 further includes a buffer assembly 34. The buffer assembly 34 includes two supports 341, a guide rod 342, and two springs 343. The two supports 341 are arranged along the length direction of the machine tool 1 and are fixed on the bottom of the sliding seat 322. The guide rod 342 is arranged along the length direction of the machine tool 1 and is connected at both ends to the two supports 341. The sliding block 313 is slidingly connected to the middle part of the guide rod 342. The two springs 343 are sleeved on the rod body of the guide rod 342 between the two supports 341 and the sliding block 313. By arranging the buffer assembly 34, rigid collision between the second clamping mechanism 3 and the machine tool 1 or other parts during sliding is prevented, and the function of flexible buffering is achieved, thereby avoiding damage to the device or the workpiece.

[0070] Referring to Figure 3The outer threaded part 20 is a solid column or a hollow pipe. When the outer threaded part 20 is a hollow pipe, the second centering assembly 35 is further included. The second centering assembly 35 includes a second centering seat 351 and a second centering shaft 352. The second centering seat 351 is fixed on the side of the second pneumatic clamp jaw 33 away from the first pneumatic clamp jaw. The second centering shaft 352 is coaxially arranged with the second pneumatic clamp jaw 33 and fixed at one end of the second centering seat 351 and extends to the second pneumatic clamp jaw 33 at the other end. An optical sensor is installed on the second centering seat 351 to monitor whether the outer threaded part 20 is installed in place. The outer threaded part 20 passes through the hollow shaft of the second pneumatic clamp jaw 33, is sleeved on the second centering shaft 352 and can abut against the end face of the second centering seat 351, thereby ensuring that the outer threaded part 20 is coaxially arranged with the second pneumatic clamp jaw 33 and enhancing the stability of the clamping of the outer threaded part 20.

[0071] Specifically, the feeding mechanism 8 is further provided. The feeding mechanism 8 includes a feeding drive part, a feeding table 81, a feeding support 82 and a discharging support 83. The feeding drive part is fixed on the side wall of the machine tool 1 and electrically connected to the controller 6. The feeding table 81 is fixed on the output end of the feeding drive part to slide between the first pneumatic clamp jaw and the second pneumatic clamp jaw 33 along the width direction of the machine tool 1 under the driving of the feeding drive part. The feeding support 82 and the discharging support 83 are spaced apart along the width direction of the machine tool 1 and installed on the top of the feeding table 81. The feeding drive part is any one of a telescopic motor, a pneumatic cylinder, a hydraulic cylinder, a lead screw transmission mechanism or other known linear sliding mechanisms. The automatic feeding and discharging can be realized by using the feeding mechanism 8, without manual operation, saving time and effort and being safe.

[0072] More specifically, the feeding support 82 includes a feeding table 821, an inner threaded part bracket and an outer threaded part bracket. The inner threaded part bracket and the outer threaded part bracket are arranged side by side along the length direction of the machine tool 1 and installed on the top of the feeding table 821. The inner threaded part bracket and the outer threaded part bracket are symmetrically arranged along the width direction of the machine tool 1 and have the same structure. Both of them include a first support 822, a roller 823 and a first supporting plate 824. The first support 822 and the first supporting plate 824 are spaced apart along the length direction of the machine tool 1 and fixed on the top of the feeding table 821. The roller 823 is rotatably installed on the top of the first support 822. The first supporting plate 824 has a first arc-shaped clamping groove penetrating along the length direction of the machine tool 1. The first supports 822 of the inner threaded part bracket and the outer threaded part bracket are away from each other, and the first supporting plates 824 are close to each other. Under the action of the roller 823, the inner threaded part 10 and the outer threaded part 20 to be screwed are close to each other along the length direction of the machine tool 1, respectively installed on the inner threaded part bracket and the outer threaded part bracket, and then reciprocated between the working position and the non-working position under the action of the feeding drive part.

[0073] More specifically, the unloading support 83 comprises an unloading table 831 and two second supporting plates 832 arranged along the length direction of the machine tool 1, and each of the second supporting plates 832 is provided with a second arc-shaped clamping slot penetrating along the length direction of the machine tool 1. The workpiece after screwing can be placed on the unloading support 341, which is convenient for unloading.

[0074] More specifically, the feeding table 821 and the unloading table 831 are connected to the top of the conveying table 81 through the lifting mechanism, so that the height of the feeding table 821 and / or the unloading table 831 can be adjusted. The lifting mechanism can be any one of a telescopic motor, a pneumatic cylinder, a hydraulic cylinder, a lead screw transmission mechanism or other known linear sliding mechanisms.

[0075] Specifically, the controller 6 comprises an electric control board, a touch display screen 61 and a plurality of function keys 62 electrically connected to the electric control board. Different functions can be realized by operating different function keys 62, for example Figure 5 As shown, the function keys 62 are provided with 16 action keys, three working mode keys and a start key and an emergency stop key. Each action key can control each action of an independent component. When the start key is started, the device will run a series of actions according to the program setting. The emergency stop key can manually intervene to cut off the power supply in an emergency.

[0076] The three working mode keys include a production mode, a manual mode and a debugging mode.

[0077] The production mode is used for automatic or semi-automatic production in the production process. In this mode, after the operator completes the manual operation according to the job requirements, the device automatically completes a series of actions set by the program by pressing the start key. Except for the start and emergency stop keys, the remaining keys do not work.

[0078] The manual mode is used for semi-automatic production in the product trial production stage. In this mode, the operator can operate any key to control any action component to act. One set action is completed by pressing once.

[0079] The debugging mode is used for complete manual operation in the product debugging stage. In this mode, the operator can operate any key to control any action component to act. The difference between the debugging mode and the manual mode is that one set action is completed by pressing once in the manual mode, while the action component will continuously act when the key is continuously pressed in the debugging mode, and the action will stop when the key is released.

[0080] Workpiece screwing method:

[0081] 1. Feeding: refer to Figure 6After the last workpiece is completed with the screwing operation, the outer threaded part 20 and the inner threaded part 10 to be screwed are placed in the loading support 82 respectively. Before the workpiece is placed, the height of the loading support 82 and the unloading support 83 is adjusted to make the axis of the workpiece coplanar with the axis of the first pneumatic clamping jaw and the second pneumatic clamping jaw 33.

[0082] 2. Workpiece enters the working position: as shown in Figure 7 , the workpiece enters the working position by moving the feeding table 81, and the workpiece that has completed the screwing operation can be taken away.

[0083] 3. Workpiece fixation: as shown in Figure 8 , the inner threaded part 10 and the outer threaded part 20 are respectively loaded into the clamping end of the first pneumatic clamping jaw and the second pneumatic clamping jaw 33, and the first pneumatic clamping jaw and the second pneumatic clamping jaw 33 are both internally provided with a torque sensor for detecting the clamping force of the workpiece. When the workpiece is pushed to the specified position, the first pneumatic clamping jaw and the second pneumatic clamping jaw 33 can automatically clamp the workpiece.

[0084] 4. Loading and unloading platform exits: as shown in Figure 9 , the sensor detects that the workpiece has been positioned and clamped, and then the feeding table 81 automatically exits the working area.

[0085] 5. Translation of the second clamping mechanism 3: after the feeding table 81 exits, the second pneumatic clamping jaw 33 is moved in the direction of the first pneumatic clamping jaw under self-tapping or manual control.

[0086] 6. Loading of the auxiliary positioning ring 5: as shown in Figure 10 , the auxiliary positioning ring 5 is sleeved on the outer threaded section of the outer threaded part 20 during the movement of the second pneumatic clamping jaw 33.

[0087] 7. Positioning of the auxiliary positioning ring 5: as shown in Figure 11 , when the optical axis section shoulder end face, the auxiliary positioning ring 5 and the inner threaded part 10 are closely attached, the distance between the end face of the inner threaded part 10 and the optical axis section shoulder end face is equal to the width of the auxiliary positioning ring 5, and the grating ruler marks this position as zero.

[0088] 8. Removal of the auxiliary positioning ring 5: the second pneumatic clamping jaw 33 retreats to remove the auxiliary positioning ring 5, and the second pneumatic clamping jaw 33 continues to feed to the specified position.

[0089] 9. Thread engagement and screwing: as shown in Figure 12 , when the second pneumatic clamping jaw 33 feeds to the specified position, the outer threaded part 20 is flexibly pressed against the inner threaded part 10 under the action of the spring 343 of the buffer assembly 34, the first pneumatic clamping jaw starts to rotate, and the threads are engaged and gradually screwed.

[0090] 10、screwed: torque sensor 7 detects the torque data of the first pneumatic clamp jaw at any time, the grating ruler detects the displacement of the second pneumatic clamp jaw 33, if the displacement enters the set interval, and the torque reaches the set value, it is considered that the screw has been in place and tightened, if any condition is not met, an alarm will be given to the abnormality, prompting manual intervention.

[0091] 11、the first pneumatic clamp jaw is loosened, and the second pneumatic clamp jaw 33 retreats: as Figure 13 , confirming that the workpiece is in place and tightened, the first pneumatic clamp jaw is automatically loosened, and then the second pneumatic clamp jaw 33 moves back to the specified position and stops.

[0092] 12、the material feeding table 81 moves to the unloading position, and the unloading support holds the workpiece.

[0093] 13、the second pneumatic clamp jaw 33 loosens the workpiece and retreats to the specified position and stops.

[0094] 14、at this time, all the processes are completed, and the next workpiece can be put into the next workpiece operation process.

[0095] The screwing machine of the embodiment has high operation precision and short operation time, and the completion time of a single screwing part is only about 90s, and has multiple operation modes, which is convenient and easy to control.

[0096] In the specification, each embodiment is described in a progressive manner, and each embodiment focuses on the difference from other embodiments. The same or similar parts between each embodiment can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the related parts can be referred to the method part.

[0097] The above description of the disclosed embodiments enables a person skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A screwing machine for screwing an internally threaded part (10) and an externally threaded part (20), the internally threaded part (10) having an internal thread at a first end, the externally threaded part (20) comprising an externally threaded section and a light axis section connected integrally, the externally threaded section having an outer diameter smaller than the outer diameter of the light axis section and being threadable with the internal thread of the internally threaded part (10), characterized in that, The machine tool (1) comprises: a machine tool (1), the inner threaded part (10) and the outer threaded part (20) are arranged along the length direction of the machine tool (1) in the axial direction; a first clamping mechanism (2) comprising a rotary driving part (21), a rotary transmission part and a first pneumatic clamping jaw, the rotary driving part (21) is installed on one side of the machine tool (1), the rotary transmission part is transmissionally connected to the output end of the rotary driving part (21), the first pneumatic clamping jaw is rotationally installed on the top of one end of the machine tool (1) in the length direction and is transmissionally connected to the output end of the rotary transmission part, and the second end of the inner threaded part (10) can be clamped on the clamping end of the first pneumatic clamping jaw; a second clamping mechanism (3) comprising a sliding driving part (31), a sliding transmission part (32) and a second pneumatic clamping jaw (33), the sliding driving part (31) is fixed on the top of the other end of the machine tool (1) in the length direction, the sliding transmission part (32) is transmissionally connected to the output end of the sliding driving part (31), the second pneumatic clamping jaw (33) is slidingly connected to the top of the other end of the machine tool (1) in the length direction and is transmissionally connected to the output end of the sliding transmission part (32), the clamping end of the second pneumatic clamping jaw (33) is arranged opposite to the clamping end of the first pneumatic clamping jaw, and the optical axis segment of the outer threaded part (20) can be clamped on the clamping end of the second pneumatic clamping jaw (33); a displacement sensor (4) fixed on the top of the machine tool (1) to measure the displacement of the second pneumatic clamping jaw (33); an auxiliary positioning ring (5) detachably sleeved on the outer side wall of the outer threaded segment and abutting against the shoulder of the optical axis segment and the end face of the inner threaded part (10) close to each other, so as to assist in positioning the zero position of the displacement sensor (4) before the inner threaded part (10) and the outer threaded part (20) are screwed; a controller (6), the rotary driving part (21), the first pneumatic clamping jaw, the sliding driving part (31), the second pneumatic clamping jaw (33) and the displacement sensor (4) are electrically connected to the controller (6).

2. A screwing machine according to claim 1, characterized in that The rotary transmission part comprises a transmission shaft (22), a driving gear (23), a driven gear (24) and a synchronous belt (25), one end of the transmission shaft (22) is transmissionally connected to the output end of the rotary driving part (21), the driving gear (23) is fixed on the other end of the transmission shaft (22), the driven gear (24) is rotationally connected to the machine tool (1) above the driving gear (23) and is transmissionally connected to the driving gear (23) through the synchronous belt (25), and the first pneumatic clamping jaw is transmissionally connected to the driven gear (24).

3. A screwing machine according to claim 2, characterized in that The rotary transmission part further comprises a synchronous belt tensioning wheel (26), the wheel shaft of the synchronous belt tensioning wheel (26) is arranged in parallel with the axis of the driving gear (23) and is rotationally installed on the machine tool (1), and the rolling surface of the synchronous belt tensioning wheel (26) is rollingly connected to the transmission surface of the synchronous belt (25).

4. A screwing machine according to claim 2, characterized in that A torque sensor (7) is further arranged, which is fixed on the shaft of the transmission shaft (22) and electrically connected to the controller (6).

5. A screwing machine according to claim 1, characterized in that The sliding drive part (31) comprises a drive motor (311), a screw rod (312) and a sliding block (313), the drive motor (311) is fixed on the top of the other end of the length direction of the machine tool (1) and electrically connected to the controller (6), the screw rod (312) is arranged along the length direction of the machine tool (1) and one end is drivingly connected to the drive motor (311), the other end is rotatably connected to the machine tool (1), the sliding block (313) is drivingly connected to the screw rod (312), and the sliding transmission part (32) is fixed on the top of the sliding block (313).

6. A screwing machine according to claim 5, characterized in that The sliding transmission part (32) comprises a sliding rail (321) and a sliding seat (322), the sliding rail (321) is arranged along the length direction of the machine tool (1) and fixed on the top of the machine tool (1), the sliding seat (322) is fixed on the top of the sliding block (313) and slidingly connected to the sliding rail (321), and the second pneumatic clamp jaw (33) is fixed on the top of the sliding seat (322).

7. A screwing machine according to claim 6, characterized in that The second clamping mechanism (3) further comprises a buffer assembly (34), the buffer assembly (34) comprises two supports (341), a guide rod (342) and springs (343), two supports (341) are arranged along the length direction of the machine tool (1) and fixed on the bottom of the sliding seat (322), the guide rod (342) is arranged along the length direction of the machine tool (1) and both ends are respectively connected to two supports (341), the sliding block (313) is slidingly connected to the middle part of the guide rod (342), and two springs (343) are respectively sleeved on the rod body of the guide rod (342) between two supports (341) and the sliding block (313).

8. A screwing machine according to claim 5, characterized in that A feeding mechanism (8) is further arranged, which comprises a feeding drive part, a feeding table (81), a feeding support (82) and a discharging support (83), the feeding drive part is fixed on the side wall of the machine tool (1) and electrically connected to the controller (6), the feeding table (81) is fixed on the output end of the feeding drive part to slide along the width direction of the machine tool (1) between the first pneumatic clamp jaw and the second pneumatic clamp jaw (33) under the driving of the feeding drive part, and the feeding support (82) and the discharging support (83) are installed on the top of the feeding table (81) along the width direction of the machine tool (1).

9. A screwing machine according to claim 8, characterized in that The upper feeding support (82) comprises an upper feeding table (821), an inner threaded part bracket and an outer threaded part bracket, the inner threaded part bracket and the outer threaded part bracket are arranged in parallel along the length direction of the machine tool (1) and are installed on the top of the upper feeding table (821) and have the same structure, and each comprises a first support (822), a roller (823) and a first supporting plate (824), the first support (822) and the first supporting plate (824) are arranged at intervals along the length direction of the machine tool (1) and are fixed on the top of the upper feeding table (821), the roller (823) is rotatably installed on the top of the first support (822), and the top of the first supporting plate (824) is provided with a first arc-shaped clamping groove penetrating along the length direction of the machine tool (1); wherein the first supports (822) of the inner threaded part bracket and the outer threaded part bracket are opposite to each other, and the first supporting plates (824) thereof are close to each other.

10. A screwing machine according to claim 8, characterized in that The unloading support (83) comprises an unloading table (831) and two second supporting plates (832) arranged at intervals along the length direction of the machine tool (1), and the top of each second supporting plate (832) is provided with a second arc-shaped clamping groove penetrating along the length direction of the machine tool (1).

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