Screwing device for self-plugging rivet

Abstract

The utility model belongs to the field of self-plugging rivets, and discloses a self-plugging rivet screwing device which comprises a pipe body carrier, a rivet body carrier and a first screwing mechanism. The pipe body carrier is movably switched between a feeding position and a screwing position; the first twisting mechanism is used for clamping the first end of the core rod so as to drive the core rod to rotate around the axis of the core rod. The rivet body carrier, the pipe body carrier located at the screwing position and the first screwing mechanism are sequentially arranged along a first straight line, and the first screwing mechanism, the rivet body carrier and the pipe body carrier move relatively along the first straight line to be matched so that the core rod, a pipe body on the pipe body carrier and a rivet body on the rivet body carrier can be combined into a first prefabricated product. According to the utility model, the transfer efficiency of the pipe body for assembling the ring can be quickly improved, so that the screwing efficiency of the self-plugging rivet is effectively improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of core pulling rivet, especially relates to a kind of screwing device of core pulling rivet. BACKGROUND

[0002] Core pulling rivet is a kind of rivet for single-sided riveting, especially suitable for the occasion inconveniently riveted from both sides.Usually, core pulling rivet is assembled by artificial assembly, with the development of science and technology, gradually appears the assembly equipment for core pulling rivet.

[0003] Core pulling rivet is twisted by rivet body, pipe body and core rod.Before transporting pipe body, ring needs to be assembled into pipe body, if being made, it will affect the efficiency of overall screwing process, therefore, how to improve the transport efficiency of pipe body in this equipment is the key to improve the screwing process efficiency of core pulling rivet. UTILITY MODEL CONTENTS

[0004] In order to solve the above technical problems, the utility model discloses a kind of screwing device of core pulling rivet, can quickly improve the transport efficiency of the pipe body of assembly ring, to effectively provide the screwing efficiency of core pulling rivet.

[0005] The specific technical scheme of the utility model is as follows:

[0006] A kind of screwing device of core pulling rivet, comprising:

[0007] Pipe body carrier, between loading position and screwing position, activity switching;

[0008] Rivet body carrier;And

[0009] Twist mechanism one, for clamping the first end of core rod to drive core rod rotation around its axis;

[0010] Wherein, the rivet body carrier, pipe body carrier in screwing position and twist mechanism one are sequentially arranged along the first straight line, the twist mechanism one, rivet body carrier, pipe body carrier are relatively active along the first straight line to cooperate, to combine core rod, pipe body on pipe body carrier, rivet body on rivet body carrier as prefabricated product one.

[0011] In the prior art, the nail body and the core rod can be conveyed by a conveying mechanism such as a vibrating machine, and then the core body is placed on the nail body carrier by a core body transfer mechanism, and the core rod is placed on the screwing mechanism by a core rod transfer mechanism to wait for screwing. At this time, the pipe body carrier carrying the pipe body moves to the screwing position, so as to realize screwing through the screwing mechanism. Since the pipe body is provided with a ring, there is a certain distance between the pipe body loading position and the screwing position during the pipe body forming process. If the pipe body is positioned and installed at the position of the formed product one, two steps of transfer and positioning need to be performed in the process. Therefore, the two steps of transfer and positioning are integrated into one step in the present application, that is, the pipe body carrier realizes positioning and loading of the pipe body at the same time, thereby effectively improving the screwing efficiency.

[0012] Preferably, the pipe body carrier is provided with a plurality of pipe body loading positions and screwing positions which are cyclically switched.

[0013] The present application sets up a plurality of positions for pipe body transfer, which can effectively improve the screwing efficiency.

[0014] Preferably, two parallel slide rails are arranged between the pipe body loading position and the screwing position, and a variable rail part is arranged beside each slide rail. A sliding member is arranged on the slide rail to slide along the slide rail. A push-pull member is movably connected to the sliding member, and the pipe body carrier is arranged on the push-pull member. The push-pull member is matched with the variable rail part, and the variable rail part is in a curved shape in the length direction of the slide rail to drive the push-pull member to move relative to the sliding member during the sliding of the sliding member along the slide rail.

[0015] The double-position transfer mechanism disclosed in the present application includes two pipe body carriers, which can realize sequential switching between the loading position and the screwing position, and realize movement avoidance under the action of the sliding member and the push-pull member, that is, when one of the pipe body carriers is located at the loading position, the other pipe body carrier moves between the loading position and the screwing position, and / or reversely moves, and / or the pipe body carrier is located at the screwing position. Therefore, the movements of the pipe body carriers of the two positions do not interfere with each other, and do not affect the loading and screwing.

[0016] Preferably, the pipe body carriers movably arranged along the two slide rails move to the same pipe body loading position, and the pipe body carriers movably arranged along the two slide rails move to the same screwing position.

[0017] In the present application, the positions of the two pipe body carriers at the loading position and the screwing position coincide, so that during the loading and screwing, the screwing adjustment is not performed according to the positions of the different pipe body carriers, thereby ensuring the screwing efficiency.

[0018] Preferably, the push-pull member is slidably connected to the sliding member, and the sliding direction of the push-pull member relative to the sliding member is perpendicular to the guiding direction of the slide rail.

[0019] The structure is simple, the guiding sliding efficiency is high, and the two pipe body carriers can well avoid each other.

[0020] Preferably, the interval of the two variable rail portions at the end position of the slide rail is smaller than the interval of the two variable rail portions at the middle position of the slide rail.

[0021] The structure is simple, the two pipe body carriers can have the same feeding position and screwing position, and can avoid each other during switching movement, so that the efficiency is improved.

[0022] Preferably, in the prefabricated product one, the second end of the core rod penetrates into the pipe body and extends into the nail body, and one end of the pipe body assembly ring abuts against the necked end of the nail body.

[0023] Further comprising a secondary screwing assembly, which comprises:

[0024] The secondary screwing assembly comprises a secondary screwing mechanism and a secondary carrier, the secondary carrier is used for positioning and placing the prefabricated product one, and the secondary screwing mechanism is used for cooperating with the first end of the core rod to drive the core rod to rotate around the axis of the core rod, the secondary screwing mechanism and the secondary carrier cooperate and act along the axis of the prefabricated product one, so that the prefabricated product one is screwed into a prefabricated product two, in the prefabricated product two, the neck-breaking groove of the core rod is inserted into the pipe body and does not enter the nail body, and the second end of the core rod penetrates out of the nail body.

[0025] Further comprising a tertiary screwing assembly, which comprises:

[0026] The tertiary screwing assembly comprises a tertiary screwing mechanism and a tertiary carrier, the tertiary carrier is used for positioning and placing the prefabricated product two, and the tertiary screwing mechanism is used for clamping the second end of the core rod to drive the core rod to rotate around the axis of the core rod, the tertiary screwing mechanism and the tertiary carrier cooperate and act along the axis of the prefabricated product two, so that the prefabricated product two is screwed into a prefabricated product three, in the prefabricated product three, the neck-breaking groove of the core rod is inserted into the nail body, and the first end of the core rod abuts against the end of the pipe body.

[0027] Since in the first time of screwing, if the one-off molding is the self-plugging rivet which can be directly used, the screwing efficiency is usually low due to the long screwing stroke of the core rod, and on this basis, in order to improve the screwing efficiency, only the screwing speed can be increased, and thus the jamming probability is increased, thereby reducing the yield, therefore, in order to improve the manufacturing efficiency of the prefabricated product three, the screwing speed of the core rod and the prevention of jamming need to be considered, therefore, the screwing process can be divided into three stages, so that the screwing stroke can be reduced in each screwing stage, thereby the jamming probability is greatly reduced, and further screwing acceleration can be obtained, thereby the processing quality and efficiency can be significantly improved while ensuring the processing quality of the self-plugging rivet, and the yield can be effectively improved; it can be known that the neck breaking groove is basically located in the middle of the core rod, in the first time of screwing, the prefabricated product one reaches the purpose of cooperation with three, in the second time of screwing assembly, the core rod basically moves half of the remaining stroke, and in the third time of screwing assembly, the core rod moves the remaining stroke, thereby the three times of screwing process are reasonably distributed, thereby the screwing efficiency is ensured.

[0028] Preferably, the third time of screwing assembly further comprises:

[0029] A jacking mechanism, the jacking mechanism cooperates with the first end of the core rod to push the core rod along its axis while the screwing mechanism three drives the core rod to rotate.

[0030] In the third time of screwing assembly, the screwing of the prefabricated product three can be completed when the screwing mechanism three drives the core rod to rotate, but the efficiency is low and the stability is not high, therefore, the jacking mechanism is arranged, the core rod is pushed while the screwing mechanism three is screwed, thereby the thread feeding between the core rod and the rivet body is more stable, thereby the stability of the screwing of the prefabricated product three is further ensured.

[0031] Preferably, the jacking mechanism comprises:

[0032] A jacking driving mechanism, the jacking driving mechanism is axially movable along the core rod to apply the jacking action;

[0033] A jacking piece, the jacking piece is rotationally arranged on the jacking driving mechanism, and the jacking piece is used to abut against the first end of the core rod to rotate with the core rod when the core rod is jacked.

[0034] The jacking piece can realize the positioning abutment of the core rod, thereby creating the structural condition for jacking the core rod, and in the screwing process, in order to avoid the core rod being broken, the jacking piece is configured to rotate with the core rod, thereby better ensuring the jacking stability and the screwing stability.

[0035] Preferably, the third time of screwing assembly further comprises a detection mechanism two, which is used to detect the position information of the first end of the core rod in the prefabricated product three on the third carrier.

[0036] The top-up mechanism detects the relative position between the neck-breaking groove and the nail body / tube body through the detection mechanism two during the movement of the push core rod, to determine whether the neck-breaking groove is located at the preset position; the neck-breaking groove does not enter the nail body in the prefabricated product two, that is, the last stage of the twisting stroke is reserved, and the last stroke stage is placed into the nail body through the push-up while twisting, to avoid jamming and improve efficiency on the basis of ensuring the twisting speed.

[0037] Preferably, the rotating axis of the pusher is provided with a through hole, through which the detection mechanism two detects the position information of the first end of the core rod.

[0038] The top-up mechanism detects the relative position between the neck-breaking groove and the nail body / tube body through the detection mechanism two during the movement of the push core rod, to determine whether the neck-breaking groove is located at the preset position; the neck-breaking groove does not enter the nail body in the prefabricated product two, that is, the last stage of the twisting stroke is reserved, and the last stroke stage is placed into the nail body through the push-up while twisting, to avoid jamming and improve efficiency on the basis of ensuring the twisting speed.

[0039] Preferably, the nail body carrier, the secondary carrier and the tertiary carrier each comprise a press-fitting mechanism for positioning and fitting the nail body.

[0040] The press-fitting mechanism comprises:

[0041] a carrier seat for placing the nail body; and

[0042] A press-fitting clamp that can switch between a press-fitting position and a release position to press the nail body on the carrier seat.

[0043] At the first twisting assembly, the nail body is used as the positioning, and the tube body and the core rod move along the first straight line, which can well complete the twisting of the prefabricated product one; at the secondary twisting assembly, the nail body in the prefabricated product one is used as the positioning, and after twisting the core rod, the prefabricated product two can be well twisted; at the tertiary twisting assembly, the nail body in the prefabricated product two is used as the positioning, and after twisting the core rod, the prefabricated product three can be well twisted; in the above process, the press-fitting clamp well limits the axial position of the nail body, thereby meeting the process positioning of each twisting stage and ensuring a good yield rate of products in each stage.

[0044] Preferably, the carrier seat is provided with a groove part one for fitting the outer circumferential surface of the nail body, and one side of the groove part one is provided with a groove part two for fitting the cap edge of the nail body.

[0045] The special structure of the nail body can well realize the limitation of the nail body, so that the stability of the twisting can be ensured when cooperating with the press-fitting clamp, thereby ensuring the yield rate of products in each stage.

[0046] Preferably, the screwing mechanism one, the screwing mechanism two and the screwing mechanism three are provided with a torque sensor for detecting whether the screwing action is stuck.

[0047] The torque sensor can detect the screwing stability in real time, and the loss can be avoided through instant judgment.

[0048] Preferably, the utility model also comprises:

[0049] The detection mechanism one is arranged between the feeding position and the screwing position, and is used for detecting whether the ring is installed in the pipe body carried by the pipe body carrier.

[0050] For the core-pulling rivet, the ring should be pre-installed in the pipe body, and the ring can realize self-locking of the core-pulling rivet to ensure the riveting stability, so the ring is an indispensable component, and thus it is necessary to judge whether the ring exists or not between the screwing.

[0051] Compared with the prior art, the utility model can improve the transfer efficiency of the pipe body, thereby effectively improving the efficiency of the screwing process; the utility model can form the core-pulling rivet through three times of screwing, can further improve the screwing efficiency of the core-pulling rivet, and avoids the sticking in the process of screwing, compared with the screwing process of the one-time forming preform three, not only has a faster screwing speed, but also can avoid or reduce the occurrence of the sticking, so that the yield is higher. BRIEF DESCRIPTION OF DRAWINGS

[0052] Figure 1 It is a schematic view of the embodiment of the utility model;

[0053] Figure 2 It is a setting schematic view of the clamping mechanism one, the clamping mechanism four and the clamping mechanism five in the embodiment of the utility model;

[0054] Figure 3 It is a setting schematic view of the pipe body carrier double-station transfer in the embodiment of the utility model;

[0055] Figure 4 It is Figure 3 a top view;

[0056] Figure 5 It is a state schematic view of the double-station transfer in the embodiment of the utility model;

[0057] Figure 6 It is a schematic view of the pressing mechanism in the embodiment of the utility model;

[0058] Figure 7 It is Figure 6 an enlarged view of A;

[0059] Figure 8 It is a sectional view of the twice screwing assembly and the thrice screwing assembly in the embodiment of the utility model;

[0060] Figure 9 for Figure 8 an enlarged view of B of

[0061] Figure 10 for Figure 8 an enlarged view of C of

[0062] Figure 11 for Figure 8 an enlarged view of D of

[0063] Figure 12 for

[0064] Figure 13 for

[0065] Figure 14 for

[0066] In the figure: 100 - primary screwing assembly; 200 - secondary screwing assembly; 300 - tertiary screwing assembly; 400 - core rod; 500 - tube body; 501 - ring; 600 - nail body; 700 - preform one; 800 - preform two; 900 - preform three; 1 - nail body carrier; 2 - tube body carrier; 201 - carrier one; 202 - carrier two; 3 - screwing mechanism one; 4 - screwing mechanism two; 5 - secondary carrier; 6 - screwing mechanism three; 7 - tertiary carrier; 8 - clamping mechanism one; 9 - clamping mechanism four; 10 - clamping mechanism five; 11 - sliding member; 12 - push-pull member; 13 - sliding rail; 14 - rail changing part; 15 - carrier seat; 16 - pressing grab; 17 - groove part one; 18 - groove part two; 19 - pushing piece; 20 - bearing; 21 - detection mechanism two; 22 - reference surface; 23 - detection surface; 24 - detection mechanism one. DETAILED DESCRIPTION

[0067] In order for those skilled in the art to better understand the technical scheme of the utility model, the utility model will be further described in detail below in combination with specific embodiments.

[0068] As Figures 1-5 shown, a core-pulling rivet screwing device comprises a tube body carrier 2, a nail body carrier 1 and a screwing mechanism one 3; the tube body carrier 2 is switched between a feeding position and a screwing position; the screwing mechanism one 3 is used for clamping the first end of a core rod 400 to drive the core rod 400 to rotate around its axis; the nail body carrier 1, the tube body carrier 2 in the screwing position and the screwing mechanism one 3 are arranged along a first straight line in sequence, the screwing mechanism one 3, the nail body carrier 1 and the tube body carrier 2 are relatively moved along the first straight line to cooperate, so as to combine the core rod 400, the tube body 500 on the tube body carrier 2 and the nail body 600 on the nail body carrier 1 into a preform one 700.

[0069] As Figure 1 and Figure 2 shown, in the present embodiment, the pin body 600 is transferred to the pin body carrier 1 by the clamping mechanism one 8, the tube body 500 is transferred to the tube body carrier 2 by the clamping mechanism two, and the core rod 400 is transferred to the screwing mechanism one 3 by the clamping mechanism three, which have clamping jaws to achieve the clamping of the components. In the present embodiment, the tube body carrier 2 can be switched between the loading position and the screwing position, that is, when the tube body carrier 2 is located at the loading position, the tube body 500 can be loaded, and when the tube body carrier 2 carrying the tube body 500 moves to the screwing position, the screwing of the prefabricated product one 700 can be carried out. Further, the tube body carrier 2 is provided with a plurality of positions that can be switched in turn between the loading position and the screwing position of the tube body 500. That is, the present embodiment can realize multi-station transfer, in order to ensure the screwing efficiency, the tube body carriers 2 of each station are switched in turn between the loading position and the screwing position, in other words, when one of the tube body carriers 2 is located at the loading position, the other tube body carriers 2 move between the loading position and the screwing position, and / or move in the opposite direction, and / or one of the tube body carriers 2 is at the screwing position, so that the movements of the tube body carriers 2 of each station do not interfere with each other. Specifically, as Figure 3 shown, two parallel slide rails 13 are provided between the loading position and the screwing position of the tube body 500, and two variable rail portions 14 are respectively provided beside the two slide rails 13 to cooperate with the slide rails 13. The slide rails 13 are provided with sliding members 11 that slide along the slide rails 13, and the sliding members 11 are movably connected with push-pull members 12, and the push-pull members 12 are provided with the tube body carriers 2. The push-pull members 12 cooperate with the variable rail portions 14, and the variable rail portions 14 are curved in the length direction of the slide rails 13 to drive the push-pull members 12 to move relative to the sliding members 11 during the sliding of the sliding members 11 along the slide rails 13. On this basis, the tube body carriers 2 movably along the two slide rails 13 move to the same loading position of the tube body 500, and the tube body carriers 2 movably along the two slide rails 13 move to the same screwing position. The push-pull members 12 are slidingly connected to the sliding members 11, and the sliding direction of the push-pull members 12 relative to the sliding members 11 is perpendicular to the guiding direction of the slide rails 13. The distance between the two variable rail portions 14 at the end positions of the slide rails 13 is smaller than the distance between the two variable rail portions 14 at the middle positions of the slide rails 13. As Figures 2-5As shown, the two pipe body carriers 2 are respectively carrier one 201 and carrier two 202. In a preferred embodiment, when carrier one 201 is at the loading position, carrier two 202 is at the screwing position. After loading and screwing, carrier one 201 moves along the slide rail 13 to switch to the screwing position, and carrier two 202 moves in the opposite direction along the slide rail 13 to switch to the loading position. In other words, carrier one 201 and carrier two 202 sequentially carry the pipe body 500 for loading and screwing. When carrier one 201 and carrier two 202 switch simultaneously, they move relative to each other under the drive of the corresponding push-pull member 12. Therefore, during the movement of carrier one 201 and carrier two 202 along the corresponding slide rail 13, carrier one 201 and carrier two 202 move a certain distance in the direction perpendicular to the slide rail 13 and then stop. At the end of the slide rail 13, carrier one 201 and carrier two 202 return to the loading position or the screwing position. In other words, during the movement of carrier one 201 and carrier two 202 at the movement switching position, they move away from each other in the direction perpendicular to the slide rail 13 and then stop at the same position at the end of the slide rail 13. In this way, the pipe body 500 is loaded and screwed. In this embodiment, a detection mechanism one 24 is arranged between the loading position and the screwing position matched with the nail body carrier 1, which is used to detect whether the ring 501 is installed in the pipe body 500. The detection mechanism one 24 is a visual sensor, which detects the presence or absence of the ring 501, thereby avoiding the incomplete assembly of the blind rivet.

[0070] In this embodiment, in the prefabricated product one 700, the second end of the core rod 400 penetrates into the pipe body 500 and extends into the nail body 600, and one end of the pipe body 500 assembled with the ring 501 abuts against the necked end of the nail body 600. A secondary screwing assembly 200 is further included, which comprises a screwing mechanism two 4 and a secondary carrier 5. The secondary carrier 5 is used to position and place the prefabricated product one 700, and the screwing mechanism two 4 is used to cooperate with the first end of the core rod 400 to drive the core rod 400 to rotate around its axis. The screwing mechanism two 4 and the secondary carrier 5 cooperate and act along the axis of the prefabricated product one 700 to screw the prefabricated product one 700 into a prefabricated product two 800. In the prefabricated product two 800, the neck-breaking groove of the core rod 400 is inserted into the pipe body 500 and does not enter the nail body 600, and the second end of the core rod 400 penetrates out of the nail body 600. A tertiary screwing assembly 300 is further included, which comprises a screwing mechanism three 6 and a tertiary carrier 7. The tertiary carrier 7 is used to position and place the prefabricated product two 800, and the screwing mechanism three 6 is used to clamp the second end of the core rod 400 to drive the core rod 400 to rotate around its axis. The screwing mechanism three 6 and the tertiary carrier 7 cooperate and act along the axis of the prefabricated product two 800 to screw the prefabricated product two 800 into a prefabricated product three 900. In the prefabricated product three 900, the neck-breaking groove of the core rod 400 is inserted into the nail body 600, and the first end of the core rod 400 abuts against the end of the pipe body 500.

[0071] The nail body carrier 1, the tube body carrier 2 and the screwing mechanism one 3 are part of the primary screwing assembly 100. In the present embodiment, the nail body 600 is transferred to the nail body carrier 1 by the clamping mechanism one 8, the tube body 500 is transferred to the tube body carrier 2 by the clamping mechanism two, the core rod 400 is transferred to the screwing mechanism one 3 by the clamping mechanism three, the nail body 600, the core rod 400 and the tube body 500 are arranged along the first straight line in the first work station by the nail body carrier 1, the tube body carrier 2 and the screwing mechanism one 3, the axis of the nail body 600, the axis of the tube body 500 and the axis of the core rod 400 all coincide with the first straight line, the nail body 600 is positioned by the pressing mechanism on the nail body carrier 1, the screwing mechanism one 3 clamps the first end of the core rod 400, thus, during the rotation of the core rod 400, the screwing mechanism one 3 and the tube body carrier 2 move along the first straight line to screw the core rod 400, the tube body 500 and the nail body 600 into the primary product 700. Then, the primary product 700 is clamped by the clamping mechanism four 9 and is transferred to the secondary carrier 5, the primary product 700 is positioned by the pressing mechanism on the secondary carrier 5, then the first end of the core rod 400 is clamped by the screwing mechanism two to feed the broken neck groove of the core rod 400 to the preset position by screwing, so as to screw the core rod 400, the tube body 500 and the nail body 600 into the secondary product 800. Finally, the secondary product 800 is clamped by the clamping mechanism five 10 and is transferred to the tertiary carrier 7, the secondary product 800 is positioned by the pressing mechanism on the tertiary carrier 7, then the second end of the core rod 400 is clamped by the screwing mechanism three, the first end of the core rod 400 is pressed by the pressing mechanism, so as to feed the core rod 400 to the position required by the tertiary product 900 by screwing and pushing of the pressing mechanism, so as to screw the core rod 400, the tube body 500 and the nail body 600 into the tertiary product 900.

[0072] As Figure 1 , Figure 8 , Figure 9As shown, in order to better screw the prefabricated product three 900, the third screwing assembly 300 further comprises a tightening mechanism which cooperates with the first end of the core rod 400 to push the core rod 400 along its axis while the screwing mechanism 36 drives the core rod 400 to rotate. Further, the tightening mechanism comprises a pushing driving mechanism and a pushing piece 19; the pushing driving mechanism is axially movable along the core rod 400 to apply a pushing action; the pushing piece 19 is rotatably arranged on the pushing driving mechanism, and the pushing piece 19 is used to abut against the first end of the core rod 400 to rotate with the core rod 400 when the core rod 400 is pushed. Specifically, bearings 20 are arranged outside the pushing piece 19 to provide mounting positions for the pushing piece 19 and to support the pushing piece 19, and the pushing piece 19 is made of rubber material, and when it cooperates with the core rod 400, the pushing piece 19 and the core rod 400 have a large friction force, so that the pushing piece 19 can rotate with the core rod 400 when the core rod 400 rotates. In the working process, the core rod 400 is driven by the screwing mechanism 36, so that the core rod 400 has a feeding speed relative to the nail body 600, at this time, the tightening mechanism moves axially along the core rod 400, so that the tightening mechanism also has a feeding speed relative to the nail body 600, when the two kinds of feeding speeds are consistent, that is, the tightening mechanism pushes the core rod 400 at the same speed, because the core rod 400 and the nail body 600 have a threaded connection relationship, so that the movement of the tightening mechanism pushing the core rod 400 can better meet the feeding movement of the core rod 400, so as to better meet the requirements of the prefabricated product three 900.

[0073] In the present embodiment, as Figure 8 、 Figure 9As shown, the third screwing assembly 300 is further provided with a detection mechanism two 21 for detecting the position information of the first end of the core rod 400 in the prefabricated product three 900 on the third carrier 7. The detection mechanism two 21 is a linear displacement sensor. Since the carrier seat 15 is provided with a groove part one 17 for matching the outer circumferential surface of the nail body 600, one side of the groove part one 17 is provided with a groove part two 18 for matching the brim of the nail body 600, and when the surface of the brim is taken as a reference surface 22, the detection mechanism two 21 can take the end surface of the first end of the core rod 400 as a detection surface 23, so as to detect the relative distance between the reference surface 22 and the detection surface 23 in the feeding process of the core rod 400. Therefore, when there is a preset distance between the reference surface 22 and the detection surface 23, the relative distance and the preset distance can be compared to know whether the screwing of the prefabricated product three 900 meets the requirements and whether the screwing size meets the requirements. Further, the rotating axis of the pushing piece 19 is provided with a through hole for the detection mechanism two 21 to detect the position information of the first end of the core rod 400 through the through hole. This structure is simple, convenient to manufacture and assemble, and can quickly align the detection head of the detection mechanism two 21 with the end surface of the first end of the core rod 400, so as to prepare for detection. It can be known that the detection mechanism two 21 can be the contact detection in the above-mentioned embodiments, or can be non-contact detection, and when the non-contact detection is adopted, a laser range finder or the like can be used, and the rays can be detected by being shot on the first end of the core rod 400 through the through hole.

[0074] In the embodiment, the nail body carrier 1, the second carrier 5 and the third carrier 7 all include a press-fitting mechanism for positioning the nail body 600. The press-fitting mechanism includes a carrier seat 15 and a press-fitting grip 16 which can be switched between a press-fitting position and a release position. The carrier seat 15 is used to place the nail body 600, and the press-fitting grip 16 is used to press the nail body 600 on the carrier seat 15. The press-fitting grip 16 is driven by a pneumatic device. In order to avoid movement interference between the press-fitting action and the release action and other movable structures, the press-fitting grip 16 in the press-fitting position and the press-fitting grip 16 in the release position have a preset angle one. Taking the rotating plane of the press-fitting grip 16 as a reference, the position of the press-fitting grip 16 in the press-fitting position is lower than the position of the press-fitting grip 16 in the release position. Further, as shown in the drawings, the press-fitting grip 16 in the press-fitting position is provided with a press-fitting surface 24 for pressing the nail body 600, and the press-fitting grip 16 in the release position is provided with a release surface 25 for releasing the nail body 600. Figures 6-11As shown, the carrier 15 is provided with a groove part one 17 for matching the outer circumferential surface of the nail body 600, and one side of the groove part one 17 is provided with a groove part two 18 for matching the rim of the nail body 600. The function of the press-fitting mechanism is to axially position the nail body 600, so as to avoid axial displacement of the nail body 600 during the screwing process, thereby affecting the forming of the screwing process. It can be known that, in the core-pulling rivet, the nail body 600 and the core rod 400 have a threaded connection matching relationship, so that, in the case of positioning the nail body 600, rotating the core rod 400, the core rod 400 will move along the forming axis of the core-pulling rivet to form a required preform one 700 or a preform two 800 or a preform three 900. It can be known that, if the nail body 600 also moves along the axis of the core rod 400 during the rotation of the core rod 400, then it will not be possible to produce a non-required product at this process stage. Of course, if the nail body 600 also rotates along the axis of the core shaft under the action of friction, a required product cannot be obtained, and thus it is necessary to press the nail body 600 against the carrier 15 by using the press-fitting mechanism, so as to limit the axial movement and circumferential rotation of the nail body 600. Thus, in the embodiment, the groove part two 18 can achieve axial limiting of the nail body 600, and the press-fitting grip 16 can achieve limiting of the circumferential rotation of the nail body 600. The press-fitting grip 16 also has a groove part one 17 for matching the outer circumferential surface of the nail body 600, so that the nail body 600 can be well inhibited from rotating by friction.

[0075] In the embodiment, the screwing mechanism one 3, the screwing mechanism two 4 and the screwing mechanism three 6 have a torque sensor for detecting whether the screwing action is stuck. In the embodiment, the screwing mechanism one 3, the screwing mechanism two 4 and the screwing mechanism three 6 are rotatable pneumatic chucks, which have stable clamping and realize assembly of the torque sensor by directly connecting the torque sensor to the chuck, so as to reduce force transmission loss. When the screwing mechanism one 3, the screwing mechanism two 4 and the screwing mechanism three 6 screw the core rod 400, the torque sensor monitors the resistance during screwing, so as to judge whether the core rod 400 is stuck, whether the core rod 400 is coaxially matched with the nail body 600, and whether the core rod 400 is skewed to cause screwing sticking, so as to ensure smooth assembly of the core-pulling rivet and normal use of the core-pulling rivet in the later period, and to avoid the core-pulling rivet from being difficult to effectively rivet and fix due to sticking.

[0076] The preferred embodiments of the utility model are described above, and it should be noted that the above preferred embodiments should not be regarded as limitation of the utility model, and the protection scope of the utility model should be limited by the scope defined by the claims. For ordinary skilled persons in the art, several improvements and refinements can be made without departing from the spirit and scope of the utility model, and these improvements and refinements should also be regarded as the protection scope of the utility model.

Claims

1. A device for screwing a blind rivet, characterized in that The application relates to a device for manufacturing a preform, comprising: a tube carrier, which is switched between a loading position and a screwing position; a pin carrier; and a first screwing mechanism, which is used for clamping the first end of a core rod to drive the core rod to rotate around the axis of the core rod; wherein the pin carrier, the tube carrier in the screwing position and the first screwing mechanism are sequentially arranged along a first straight line, and the first screwing mechanism, the pin carrier and the tube carrier are relatively moved along the first straight line to combine the core rod, the tube on the tube carrier and the pin on the pin carrier into a first preform. The tube carrier is provided with a plurality of tube carriers which are cyclically switched between the tube loading position and the screwing position.

2. A device for screwing a blind rivet as claimed in claim 1, characterized in that Two parallel slide rails are arranged between the tube loading position and the screwing position, and two variable rail parts matched with the slide rails are arranged beside the slide rails; a sliding member is arranged on the slide rails to slide along the slide rails; a push-pull member is movably connected to the sliding member; the tube carrier is arranged on the push-pull member; the push-pull member is matched with the variable rail parts; the variable rail parts are in a curve shape in the length direction of the slide rails to drive the push-pull member to move relative to the sliding member during the sliding of the sliding member along the slide rails.

3. A device for screwing a blind rivet according to claim 2, characterized in that The tube carriers movably arranged along the two slide rails move to the same tube loading position, and the tube carriers movably arranged along the two slide rails move to the same screwing position.

4. A device for screwing a blind rivet according to claim 3, characterized in that The push-pull member is slidably connected to the sliding member, and the sliding direction of the push-pull member relative to the sliding member is perpendicular to the guiding direction of the slide rails.

5. A device for screwing a blind rivet as defined in claim 3, characterized in that The distance between the two variable rail parts at the end positions of the slide rails is smaller than the distance between the two variable rail parts at the middle positions of the slide rails.

6. A device for screwing a blind rivet as defined in claim 3, characterized in that In the first preform, the second end of the core rod penetrates into the tube and extends into the pin, and the end of the tube for assembling the ring is abutted against the necked end of the pin; 7. A device for screwing a blind rivet according to any one of claims 1 to 6, characterized in that The device further comprises a second screwing assembly, which comprises: a second screwing mechanism and a second carrier, the second carrier is used for positioning and placing the first preform, and the second screwing mechanism is used for clamping the first end of the core rod to drive the core rod to rotate around the axis of the core rod; the second screwing mechanism and the second carrier are matched and moved along the axis of the first preform to screw the first preform into a second preform, in the second preform, the neck-breaking groove of the core rod is inserted into the tube and does not enter the pin, and the second end of the core rod penetrates out of the pin; The device further comprises a third screwing assembly, which comprises: a third screwing mechanism and a third carrier, the third carrier is used for positioning and placing the second preform, and the third screwing mechanism is used for clamping the second end of the core rod to drive the core rod to rotate around the axis of the core rod; the third screwing mechanism and the third carrier are matched and moved along the axis of the second preform to screw the second preform into a third preform, in the third preform, the neck-breaking groove of the core rod is inserted into the pin, and the first end of the core rod and the end of the tube are abutted. The third screwing assembly further comprises:

8. A device for screwing a blind rivet according to claim 7, characterized in that a pressing mechanism, which is matched with the first end of the core rod to push the core rod to move along the axis of the core rod while the third screwing mechanism drives the core rod to rotate. The pressing mechanism comprises:

9. A device for screwing a blind rivet according to claim 8, characterized in that a pushing driving mechanism, which is movably arranged along the axis of the core rod to apply a pushing action. ​ A pushing piece is rotatably arranged on the pushing driving mechanism, and is used to abut against the first end of the core rod to rotate with the core rod when the core rod is pushed.

10. A device for screwing a blind rivet as defined in claim 9, characterized in that The third twisting assembly is also provided with a second detection mechanism for detecting the position information of the first end of the core rod in the third carrier.

11. A device for screwing a blind rivet as defined in claim 10, characterized in that The rotating axis of the pushing piece is provided with a through hole, through which the second detection mechanism detects the position information of the first end of the core rod.

12. A device for screwing a blind rivet as defined in claim 7, characterized in that The nail body carrier, the second carrier and the third carrier each comprise a press-fitting mechanism for positioning and fitting the nail body. The press-fitting mechanism comprises: a carrier seat for placing the nail body; and a press-gripping device switchable between a press position and a release position to press the nail body on the carrier seat.

13. A device for screwing a blind rivet according to claim 12, characterized in that The carrier seat is provided with a groove part one for fitting the outer circumferential surface of the nail body, and one side of the groove part one is provided with a groove part two for fitting the cap edge of the nail body.

14. A device for screwing a blind rivet according to claim 4, characterized in that The twisting mechanisms one, two and three are provided with a torque sensor for detecting whether the twisting action is stuck.

15. A device for screwing a blind rivet as defined in claim 1, characterized in that Further comprising: a first detection mechanism arranged between the feeding position and the screwing position, for detecting whether the ring is installed in the pipe body in the pipe body carrier transfer.

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