Automatic production equipment for rivet nuts

Abstract

The application relates to the technical field of rivet nut production equipment, and particularly discloses an automatic rivet nut production equipment which comprises a conveying device and a blanking machine, a cold heading machine, a threading machine, a heat treatment device, a sand blasting machine and a collecting device which are sequentially arranged along a conveying path of the conveying device. A plurality of conveying plates are arranged on the conveying device. The conveying plate comprises a plate frame, a cover plate, a plurality of support plates and a plurality of elastic members. The plurality of support plates are coplanarly arranged in the plate frame. The plurality of elastic members are located in the gaps between the plurality of support plates and the plate frame. The elastic members connect the support plates and the plate frame, so that the edges of the plurality of support plates are in contact under the action of the plurality of elastic members. The cover plate is located above the plurality of support plates and is connected with the plate frame. There is a gap between the cover plate and the plurality of support plates. The middle part of the cover plate is provided with a blanking hole. The application can automatically produce rivet nuts, saves manpower, and improves the production efficiency and quality of the rivet nuts.

Description

TECHNICAL FIELD

[0001] The present application relates to rivet nut processing equipment technical field, especially to a kind of rivet nut automatic production equipment. BACKGROUND

[0002] Rivet nut, also known as, pull cap, is used in the fastening field of various metal sheet, pipe and other manufacturing industries, is widely used in automobile, aviation, railway, refrigeration, elevator, switch, instrument, furniture, decoration and other electromechanical and light industry products assembly.

[0003] In the related art, the production of rivet nut usually needs to adopt multiple equipment to process in sequence, and the workpiece is usually manually transported to other equipment for processing after completing processing in the current equipment.

[0004] For the related art in the above, there are the following defects: manual handling of parts is time-consuming and laborious, especially the parts after heat treatment, the temperature is high, which is easy to cause scalding. SUMMARY

[0005] In order to improve the problem that manual production of rivet nut is time-consuming and laborious, the present application provides a kind of rivet nut automatic production equipment.

[0006] The rivet nut automatic production equipment provided by the present application adopts the following technical scheme:

[0007] The rivet nut automatic production equipment comprises a conveying device and a blanking machine, a cold header, a threading machine, a heat treatment device, a sand blasting machine and a collecting device arranged in sequence along the conveying path of the conveying device.

[0008] A plurality of conveying plates are provided on the conveying device, the conveying plate comprises a disc frame, a cover plate, a plurality of support plates and a plurality of elastic members, the plurality of support plates are coplanarly arranged in the disc frame, the plurality of elastic members are located in the gap between the plurality of support plates and the disc frame, the elastic members connect the support plates and the disc frame, so that the edges of the plurality of support plates are in contact under the action of the plurality of elastic members; the cover plate is located above the plurality of support plates and is connected with the disc frame, and the cover plate has a gap between the plurality of support plates, and the middle part of the cover plate has a blanking hole.

[0009] Through the above technical scheme, the conveying device connects the blanking machine, the cold header, the threading machine, the heat treatment device, the sand blasting machine and the collecting device, so that the workpiece to be processed is cut by the blanking machine and then processed by the cold header, the threading machine, the heat treatment device and the sand blasting machine in sequence, and finally the rivet nut is formed. The collecting device collects the finished rivet nuts together.

[0010] When processing, the cut part blanks of the workpiece to be processed fall into the blanking holes, and the support plate supports the blanks in the blanking holes. When the support plate is subjected to a vertical upward force, the cover plate blocks the support plate to prevent the support plate from turning upward. When the support plate is subjected to a vertical downward force, the bottom of the disc frame prevents the support plate from turning downward. The support plate can only reciprocate along the elastic force direction of the elastic member, so as to facilitate the workpiece to be processed to be pressed into or pushed out of the conveying disc.

[0011] Optionally, the conveying device comprises a transmission assembly, a support frame and a plurality of holding frames, the transmission assembly is located at the top of the support frame, and the plurality of holding frames are arranged at the top of the support frame around the transmission assembly.

[0012] Through the above technical solution, the transmission assembly is installed on the support frame, and the holding frame fixes the position of the transmission assembly to prevent displacement of the transmission assembly during operation, thereby improving the stability of the transmission assembly.

[0013] Optionally, the transmission assembly comprises an inner transmission ring, an outer transmission ring, a plurality of inner transmission wheels and a plurality of outer transmission wheels, the inner transmission wheels and the outer transmission wheels are located at the top of the support frame, the inner transmission ring is located above the plurality of inner transmission wheels, the outer transmission ring is located above the plurality of outer transmission wheels, the inner transmission ring and the outer transmission ring are coaxially arranged, the inner transmission ring and the outer transmission ring rotate around their own axes under the action of the inner transmission wheels and the outer transmission wheels, and the conveying disc is located between the inner transmission ring and the outer transmission ring and is connected with the inner transmission ring and the outer transmission ring.

[0014] Through the above technical solution, the plurality of inner transmission wheels and the plurality of outer transmission wheels respectively drive the inner transmission ring and the outer transmission ring to rotate around their own axes, drive the conveying disc to move and make the conveying disc carry the workpiece to be processed to each processing equipment.

[0015] Optionally, a part of the plurality of holding frames are located on the inner side of the inner transmission ring and are uniformly and interval distributed along the circumference of the inner transmission ring, and the other part of the holding frames are located on the outer side of the outer transmission ring and are uniformly and interval distributed along the circumference of the outer transmission ring.

[0016] Through the above technical solution, the plurality of holding frames are divided into an inner ring part and an outer ring part, the inner ring part is interval arranged along the inner wall of the inner transmission ring to keep the position of the inner transmission ring, and the outer ring part is interval arranged along the outer wall of the outer transmission ring to keep the position of the outer transmission ring, so as to improve the stability of the inner transmission ring and the outer transmission ring.

[0017] Optionally, the holding frame comprises a base and a roller, the base is installed at the top of the support frame, and the roller is located at the top of the base. The roller of the holding frame located on the inner side of the inner transmission ring abuts against the inner wall of the inner transmission ring, and the roller of the holding frame located on the outer side of the outer transmission ring abuts against the outer wall of the outer transmission ring.

[0018] Through the technical scheme, the base is installed on the top of the support frame to fix the roller, and the roller is used to limit the inner transmission ring and the outer transmission ring without affecting the operation of the inner transmission ring and the outer transmission ring, so that the operation of the inner transmission ring and the outer transmission ring is more stable.

[0019] Optionally, the inner transmission ring outer wall is provided with a plurality of inner transmission ring holes, the outer transmission ring inner wall is provided with a plurality of outer transmission ring holes, and the conveying disc is provided with a plurality of mounting rods on the side close to the inner transmission ring and the side close to the outer transmission ring.

[0020] Through the technical scheme, the inner transmission ring outer wall and the outer transmission ring inner wall are respectively provided with a plurality of inner transmission ring holes and a plurality of outer transmission ring holes, the conveying disc outer side is provided with a plurality of mounting rods, the mounting rods are distributed on the left and right sides of the conveying disc, and the mounting rods are respectively inserted into the outer transmission ring holes and the inner transmission ring holes, so that the conveying disc is fixed between the inner transmission ring and the outer transmission ring, and the conveying disc is moved forward under the action of the inner transmission ring and the outer transmission ring.

[0021] Optionally, the cold header is divided into an upper die and a lower die, the upper die is located above the conveying device, the lower die is located below the conveying device, the upper die and the lower die can independently move relative to each other, the lower die is provided with a part lifting rod at the center for lifting the part to be machined, and the part lifting rod is provided with an ejection spring at the bottom.

[0022] Through the technical scheme, the upper die presses the part to be machined in the conveying disc into the lower die for cold heading forming, the part lifting rod is located below the conveying disc to prevent the part to be machined from falling out of the lower die after being ejected out of the conveying disc by the upper die, and the part to be machined is pressed down together with the part to be machined, and the part to be machined can be re-lifted into the conveying disc after cold heading forming.

[0023] Optionally, the part collecting device comprises an ejection assembly and a part receiving box, the ejection assembly is located below the conveying device, the ejection assembly comprises a part lifting plate, a plurality of part lifting springs and a fixing pile, the part lifting springs are located at the top of the fixing pile, the part lifting plate is inclinedly arranged at the top of the part lifting springs, and the part lifting plate is lower at the end close to the sand blasting machine than at the end away from the sand blasting machine.

[0024] Through the technical scheme, when the conveying disc with the machined rivet nut runs above the ejection assembly, the bottom of the rivet nut contacts the upper surface of the part lifting plate, the rivet nut is gradually lifted by the part lifting plate during the forward movement of the conveying disc, and the part lifting spring is used to prevent the rivet nut from being stuck between the part lifting plate.

[0025] Optionally, the receiving box comprises a box body and a part picking fork, the part picking fork is located above the conveying device, the box body is located at the end of the part picking fork, the upper surface of the disc frame is provided with a part pushing plate, and when the conveying disc is located between the receiving box and the sand blasting machine, the blanking hole is located on the side of the part pushing plate away from the sand blasting machine, and the part picking fork is used for supporting the to-be-processed part lifted by the part lifting plate and guiding the to-be-processed part into the box body under the action of the part pushing plate.

[0026] Through the above technical solution, the part picking fork supports the rivet nut lifted by the part lifting assembly, the part pushing plate pushes the rivet nut supported by the part picking fork into the box body, and the processed rivet nut is collected.

[0027] In summary, the present application has at least one of the following beneficial technical effects:

[0028] 1. Through the above technical solution, the conveying device is connected with the blanking machine, the cold heading machine, the threading machine, the heat treatment device, the sand blasting machine and the part collecting device, so that the to-be-processed part is cut by the blanking machine and then sequentially processed by the cold heading machine, the threading machine, the heat treatment device and the sand blasting machine, and finally the to-be-processed part blank is processed into a rivet nut product, and finally the part collecting device collects the processed rivet nut together.

[0029] 2. Through the above technical solution, the inner transmission ring outer wall and the outer transmission ring inner wall are respectively provided with a plurality of inner transmission ring holes and a plurality of outer transmission ring holes, the outer side of the conveying disc is provided with a plurality of mounting rods, the mounting rods are respectively inserted into the outer transmission ring holes and the inner transmission ring holes, the conveying disc is fixed between the inner transmission ring and the outer transmission ring, and the conveying disc is moved forward under the action of the inner transmission ring and the outer transmission ring.

[0030] 3. Through the above technical solution, the upper die presses the to-be-processed part in the conveying disc into the lower die for cold heading forming, the part lifting rod is located below the conveying disc, the to-be-processed part is prevented from falling out of the lower die after being lifted out of the conveying disc by the upper die and being pressed down together with the to-be-processed part by the upper die, and the to-be-processed part can be lifted into the conveying disc again after cold heading forming. BRIEF DESCRIPTION OF DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without any creative effort.

[0032] Figure 1 is a schematic diagram of the overall structure of the rivet nut automatic production equipment in the embodiment of the present application;

[0033] Figure 2 is a schematic diagram of the three-dimensional structure of the conveying disc in the embodiment of the present application;

[0034] Figure 3 is the internal structure schematic diagram of the conveying disc in the embodiment of the present application;

[0035] Figure 4 is the overall structure schematic diagram of the inner transmission ring and the outer transmission ring in the embodiment of the present application;

[0036] Figure 5 is the overall structure schematic diagram of the transmission assembly and the retainer in the embodiment of the present application;

[0037] Figure 6 is the structure schematic diagram of the cold header in the embodiment of the present application;

[0038] Figure 7 is the internal structure schematic diagram of the cold header in the embodiment of the present application;

[0039] Figure 8 is the structure schematic diagram of the threading machine in the embodiment of the present application;

[0040] Figure 9 is the internal structure schematic diagram of the tapping device in the embodiment of the present application;

[0041] Figure 10 is the structure schematic diagram of the heat treatment device in the embodiment of the present application;

[0042] Figure 11 is the internal structure schematic diagram of the heat treatment device in the embodiment of the present application;

[0043] Figure 12 is the structure schematic diagram of the sand blasting machine in the embodiment of the present application;

[0044] Figure 13 is the structure schematic diagram of the assembly device in the embodiment of the present application;

[0045] Figure 14 is the partial structure schematic diagram of the assembly device in the embodiment of the present application;

[0046] Figure 15 is the local sectional structure schematic diagram of the blanking machine in the embodiment of the present application.

[0047] Reference signs:

[0048] 1, conveying device; 11, transmission assembly; 111, outer transmission ring; 1111, outer transmission ring hole; 112, inner transmission ring; 1121, inner transmission ring hole; 113, inner transmission wheel; 114, outer transmission wheel; 12, support frame; 13, retainer; 131, base; 132, roller;

[0049] 2, transport disc; 21, support plate; 22, elastic member; 23, push piece plate; 24, mounting rod; 25, blanking hole; 26, disc frame; 27, cover plate;

[0050] 3, cold header; 31, upper die; 32, lower die; 324, top piece rod; 325, ejection spring;

[0051] 4, threading machine; 41, tapping device; 411, first moving assembly; 4111, first mounting box; 4112, first inner guide column; 4113, first inner guide sleeve; 412, tapping assembly; 4121, first power piece; 4122, drill bit; 42, clamping device; 421, second moving assembly; 4211, second inner guide column; 4212, second inner guide sleeve; 4213, second mounting box; 422, clamping assembly; 4221, second power piece; 4222, left guide rail; 4223, left clamping plate; 4224, right guide rail; 4225, right clamping plate;

[0052] 5, heat treatment device; 51, third moving assembly; 511, third inner guide column; 512, third inner guide sleeve; 513, third mounting box; 52, heating machine; 521, heating coil; 522, third power piece; 53, cooling assembly; 531, liquid spray nozzle; 532, liquid pipe; 533, liquid tank; 534, container;

[0053] 6, sand blasting machine; 61, protection box; 62, nozzle; 63, sand blasting tank; 64, feeding pipe;

[0054] 7, collecting device; 71, ejection assembly; 711, top piece plate; 712, top piece spring; 713, fixing pile; 72, piece receiving box; 721, box body; 722, piece lifting fork; 7221, strip-shaped through groove; 73, finished product box;

[0055] 8, blanking machine; 81, material selecting mechanism; 811, first air blowing piece; 812, second air blowing piece; 813, guide block; 814, sliding piece channel;

[0056] 9, part to be machined. DETAILED DESCRIPTION

[0057] The following will be described in detail with reference to the accompanying drawings Figures 1-15 The application will be described in further detail.

[0058] The rivet nut is a hollow connecting piece with a cap body at one end and an internal thread inside the other end. The embodiment of the application discloses an automatic production equipment for rivet nuts. Referring to Figure 1 、 Figure 2 and Figure 3As shown, it comprises a conveying device 1 and a blanking machine 8, a cold heading machine 3, a threading machine 4, a heat treatment device 5, a sand blasting machine 6 and a collecting device 7 arranged in sequence along the conveying path of the conveying device 1. The lower strip pipe is fed at the blanking machine 8, and the blanking machine 8 cuts the blank of the workpiece 9 to be processed, which is then conveyed by the conveying device 1 to the cold heading machine 3, the threading machine 4, the heat treatment device 5 and the sand blasting machine 6 for processing, respectively. Finally, the conveying disc 2 conveys the rivet nut processed from the workpiece 9 to the collecting device 7, and the collecting device 7 collects the processed rivet nuts together to complete the production of the rivet nut.

[0059] Referring to Figure 1 , Figure 2 and Figure 3 , the conveying device 1 is provided with a plurality of conveying discs 2, and the conveying disc 2 comprises a disc frame 26, a cover plate 27, a plurality of support plates 21 and a plurality of elastic members 22. The plurality of support plates 21 are coplanarly arranged in the disc frame 26, and the plurality of elastic members 22 are located in the gap between the plurality of support plates 21 and the disc frame 26. The elastic member 22 connects the support plate 21 and the disc frame 26, so that the edges of the plurality of support plates 21 are in contact under the action of the plurality of elastic members 22. The cover plate 27 is located above the plurality of support plates 21 and is connected with the disc frame 26. There is a gap between the cover plate 27 and the plurality of support plates 21, and the middle part of the cover plate 27 has a blanking hole 25. During production, the conveying disc 2 is conveyed by the conveying device 1 to below the blanking machine 8, and the blank of the workpiece 9 to be processed cut by the blanking machine 8 is received through the blanking hole 25. After the blank of the workpiece 9 to be processed falls into the blanking hole 25, the support plate 21 supports the workpiece 9 to be processed in the blanking hole 25. When the support plate 21 is subjected to a vertical upward or downward force, the cover plate 27 or the bottom of the disc frame 26 prevents the support plate 21 from turning upward or downward, so that the support plate 21 can only move back and forth along the elastic force direction of the elastic member 22, facilitating the pressing or ejecting of the workpiece 9 to be processed into or out of the conveying disc 2.

[0060] Referring to Figure 1 , Figure 4 and Figure 5 , the conveying device 1 comprises a transmission assembly 11, a support frame 12 and a plurality of retaining frames 13. The transmission assembly 11 is located at the top of the support frame 12, and the plurality of retaining frames 13 are arranged at the top of the support frame 12 around the transmission assembly 11. The transmission assembly 11 is installed at the top of the support frame 12, and the position of the transmission assembly 11 is fixed by the retaining frame 13 to prevent the transmission assembly 11 from moving during operation, thereby improving the stability of the transmission assembly 11.

[0061] Referring to Figure 4 and Figure 5The transmission assembly 11 comprises an outer transmission ring 111, an inner transmission ring 112, a plurality of inner transmission wheels 113 and a plurality of outer transmission wheels 114. The inner transmission wheels 113 and the outer transmission wheels 114 are located at the top of the support frame 12. The inner transmission ring 112 is located above the plurality of inner transmission wheels 113, and the outer transmission ring 111 is located above the plurality of outer transmission wheels 114. The inner transmission ring 112 is coaxially arranged with the outer transmission ring 111. The inner transmission ring 112 and the outer transmission ring 111 rotate around their own axes under the action of the inner transmission wheels 113 and the outer transmission wheels 114. The transmission disc 2 is located between the inner transmission ring 112 and the outer transmission ring 111 and is connected to the inner transmission ring 112 and the outer transmission ring 111. By installing the inner transmission ring 112 and the outer transmission ring 111 on the inner transmission wheels 113 and the outer transmission wheels 114, the plurality of inner transmission wheels 113 and the plurality of outer transmission wheels 114 drive the inner transmission ring 112 and the outer transmission ring 111 to rotate around their own axes, respectively, thereby driving the transmission disc 2 to move forward and sending the parts to be machined 9 to each machining equipment for machining.

[0062] With reference to Figure 4 and Figure 5 , the outer wall of the inner transmission ring 112 is provided with a plurality of inner transmission ring holes 1121, and the inner wall of the outer transmission ring 111 is provided with a plurality of outer transmission ring holes 1111. The side of the transmission disc 2 close to the inner transmission ring 112 and the side close to the outer transmission ring 111 are both provided with a plurality of mounting rods 24, and the plurality of mounting rods 24 are respectively inserted into the corresponding inner transmission ring holes 1121 or the corresponding outer transmission ring holes 1111. By inserting the mounting rods 24 into the outer transmission ring holes 1111 and the inner transmission ring holes 1121, respectively, the transmission disc 2 is fixed between the inner transmission ring 112 and the outer transmission ring 111, and the transmission disc 2 moves forward under the action of the inner transmission ring 112 and the outer transmission ring 111.

[0063] With reference to Figure 4 and Figure 5 , part of the plurality of retainer rings 13 is located on the inner side of the inner transmission ring 112 and is uniformly and spacedly distributed along the circumference of the inner transmission ring 112, and the other part of the plurality of retainer rings 13 is located on the outer side of the outer transmission ring 111 and is uniformly and spacedly distributed along the circumference of the outer transmission ring 111. Specifically, with reference to Figure 5As shown, the retainer 13 includes a base 131 and rollers 132. The base 131 is mounted on top of the support frame 12, and the rollers 132 are located on top of the base 131. The rollers 132 of the retainer 13 located inside the inner drive ring 112 abut against the inner wall of the inner drive ring 112, and the rollers 132 of the retainer 13 located outside the outer drive ring 111 abut against the outer wall of the outer drive ring 111. The base 131 is mounted on top of the support frame 12 to fix the rollers 132. The rollers 132 are used to limit the radial movement of the outer drive ring 111 and the inner drive ring 112 without affecting their circumferential rotation, thereby improving the operational stability of the inner drive ring 112 and the outer drive ring 111.

[0064] Reference Figure 6 and Figure 7 The cold heading machine 3 includes an upper mold 31 and a lower mold 32. The upper mold 31 is located above the conveying device 1, and the lower mold 32 is located below the conveying device 1. The lower mold 32 has a push rod 324 at its center for lifting the part 9 to be processed, and a push spring 325 is provided at the bottom of the push rod 324. The upper mold 31 presses the part 9 to be processed in the transport tray 2 into the lower mold 32 for cold heading. The push rod 324 is positioned below the transport tray 2 to prevent the part 9 to be processed from being pushed out of the transport tray 2 by the upper mold 31 and falling out of the lower mold 32. The part 9 is pressed down by the upper mold 31 along with the part 9. After the part 9 is cold-headed, it can be pushed back into the transport tray 2. The other components of the cold heading machine 3 in this application are the same as those in the prior art and will not be described in detail here.

[0065] Reference Figure 8 and Figure 9 As shown, the threading machine 4 includes a tapping device 41 and a clamping device 42. The tapping device 41 includes a first moving component 411 and a tapping component 412. The first moving component 411 is located above the conveying device 1, and the tapping component 412 is fixed to the bottom of the first moving component 411. The first moving component 411 is used to drive the tapping component 412 to move up and down to process the workpiece 9 to be processed.

[0066] Reference Figure 9 As shown, the first moving component 411 includes a first mounting box 4111, a plurality of first inner guide sleeves 4113 and a plurality of first inner guide posts 4112. The first inner guide posts 4112 are all inserted into the first mounting box 4111, and the first inner guide sleeves 4113 are sleeved on the corresponding first inner guide posts 4112. The first mounting box 4111 is fixed to the outer wall of the plurality of first inner guide sleeves 4113. The first inner guide posts 4112 are used to connect to the tapping component 412. The first mounting box 4111 also has a lead screw and a drive motor that drives the lead screw to rotate. The tapping component 412 is connected to a nut sleeve that is threaded onto the lead screw.

[0067] With reference to Figure 9 As shown in FIG. 12, the tapping assembly 412 includes a drill bit 4122 and a first power member 4121, which can be a motor, the drill bit 4122 being a tapping drill bit, the first power member 4121 being installed in the first mounting box 4111, the drill bit 4122 being clamped on an output shaft of the first power member 4121; wherein the first power member 4121 is configured to provide power for the drill bit 4122, the drill bit 4122 being configured to tap inside the workpiece 9, both the first power member 4121 and the drill bit 4122 being of existing structure, which will not be described herein again.

[0068] With reference to Figure 9 As shown in FIG. 13, the clamping device 42 includes a second moving assembly 421 and two groups of clamping assemblies 422 symmetrically arranged left and right, the second moving assembly 421 being located below the conveying device 1, the clamping assemblies 422 being arranged on top of the second moving assembly 421; the second moving assembly 421 is configured to drive the clamping assemblies 422 to move up and down to cooperate with the tapping device 41 to process the workpiece 9, so as to reduce the failure of tapping caused by rotation of the workpiece 9. The second moving assembly 421 includes a second mounting box 4213, a plurality of second inner guide sleeves 4212 and a plurality of second inner guide columns 4211, the second inner guide columns 4211 being inserted into the second mounting box 4213, the second inner guide sleeves 4212 being sleeved on the second inner guide columns 4211, the second mounting box 4213 being fixedly connected with the second inner guide sleeves 4212, the second inner guide columns 4211 being connected with a lifting member, the lifting member being configured to mount the clamping assemblies 422; the second inner guide columns 4211 and the second inner guide sleeves 4212 cooperate to play a guiding role, and the lifting member and the clamping assemblies 422 are driven to move up and down by a motor screw nut structure or a hydraulic cylinder.

[0069] With reference to Figure 9 As shown in FIG. 14, one group of clamping assemblies 422 includes a left guide rail 4222 and a left clamping plate 4223, the left clamping plate 4223 being installed on the left guide rail 4222 and being capable of moving left and right, and the other group of clamping assemblies 422 includes a right guide rail 4224 and a right clamping plate 4225, the right clamping plate 4225 being installed on the right guide rail 4224 and being capable of moving left and right; both groups of clamping assemblies 422 include a second power member 4221 mounted on the lifting member, the second power member 4221 being a hydraulic cylinder or an air cylinder and being configured to drive the left clamping plate 4223 and the right clamping plate 4225 to move left and right, the left clamping plate 4223 and the right clamping plate 4225 being capable of clamping the workpiece 9 when they are close to each other.

[0070] With reference to Figure 10 and Figure 11As shown, the heat treatment device 5 comprises a third moving assembly 51, a heating machine 52 and a cooling assembly 53; the third moving assembly 51 is used to drive the heating machine 52 to move up and down, the heating machine 52 is used to heat the workpiece 9 to make the workpiece 9 enter the austenite state, and the cooling assembly 53 is used to cool the workpiece 9 to make the workpiece 9 quickly cool at a cooling rate greater than the critical cooling rate to the isotherm near the martensite to perform the martensite transformation.

[0071] With reference to Figure 11 As shown, the third moving assembly 51 comprises a third mounting box 513, a plurality of third inner guide sleeves 512 and a plurality of third inner guide columns 511, the third inner guide columns 511 are all inserted into the third mounting box 513, the third inner guide sleeves 512 are all sleeved on the corresponding third inner guide columns 511, the third mounting box 513 is fixedly connected with the third inner guide sleeves 512, and the third inner guide columns 511 are connected with the heating machine 52; the third inner guide columns 511 and the heating machine 52 are driven to move up and down through a motor-screw-nut structure or a hydraulic cylinder, and the third inner guide columns 511 and the third inner guide sleeves 512 cooperate to guide the stable and reliable lifting movement of the heating machine 52.

[0072] With reference to Figure 11 As shown, the heating machine 52 comprises a heating ring 521 and a third power member 522, the third power member 522 can be a microwave oven or a high-frequency furnace, the third power member 522 is installed in the third mounting box 513, and the heating ring 521 is installed at the bottom of the third power member 522; the third power member 522 is used to provide a heating energy source for the heating ring 521, and the heating ring 521 is used to heat the workpiece 9.

[0073] With reference to Figure 11 As shown, the cooling assembly 53 comprises a liquid spraying nozzle 531, a liquid pipe 532, a liquid tank 533 and a container 534, the container 534 is located below the conveying device 1, and the liquid spraying nozzle 531 is connected to the liquid tank 533 through the liquid pipe 532; the liquid tank 533 is used to store the cooling liquid, the liquid pipe 532 is used to connect the liquid tank 533 and the spraying head, the liquid spraying nozzle 531 is used to spray the cooling liquid to the workpiece 9 to quickly cool the workpiece 9, and the container 534 is used to collect the used cooling liquid for recycling.

[0074] With reference to Figure 12 As shown, the sand blasting machine 6 comprises a protective box 61, a sand blasting tank 63 and a nozzle 62, the protective box 61 is sleeved on the conveying device 1, the sand blasting tank 63 is installed outside the protective box 61, the nozzle 62 is located in the direction of the sand blasting tank 63 close to the conveying device 1, and the sand blasting tank 63 and the nozzle 62 are connected through a plurality of feeding pipes 64; the sand blasting machine 6 has the existing structure, and will not be described here.

[0075] With reference to Figure 13 And 14As shown in the drawings, the set piece device 7 includes an ejection assembly 71 and a receiving box 72, the ejection assembly 71 is located below the conveying device 1, the ejection assembly 71 includes an ejection plate 711, a plurality of ejection springs 712 and a fixed stake 713, the ejection springs 712 are located on top of the fixed stake 713, the ejection plate 711 is obliquely arranged on top of the ejection springs 712, and the ejection plate 711 is lower at the end close to the sand blasting machine 6 than at the end away from the sand blasting machine 6. When the transport disc 2 carrying the finished workpiece 9 runs above the ejection assembly 71, the bottom of the workpiece 9 is in contact with the upper surface of the ejection plate 711 and is lifted by the ejection plate 711, and the ejection springs 712 can prevent the workpiece 9 from being stuck to the ejection plate 711.

[0076] Referring to Figure 13 and 14 As shown in the drawings, the receiving box 72 includes a box body 721 and a lifting fork 722, the box body 721 has a finished product box 73 placed on one side, the lifting fork 722 is located above the conveying device 1, the middle part of the lifting fork 722 has a strip-shaped through slot 7221 arranged along the length direction of the lifting fork 722, the width of the strip-shaped through slot 7221 is smaller than the diameter of the cap body of the finished rivet nut and larger than the diameter of the rod body of the finished rivet nut, so that the rivet nut is hung on the lifting fork 722, and the box body 721 is located at the end of the lifting fork 722. Figure 2 As shown in the drawings, the upper surface of the disc frame 26 is provided with a pushing plate 23, and when the transport disc 2 is located between the receiving box 72 and the sand blasting machine 6, the blanking hole 25 is located on the side of the pushing plate 23 away from the sand blasting machine 6, the lifting fork 722 is used to receive the rivet nut lifted by the ejection plate 711 and guide the finished rivet nut into the box body 721 under the action of the pushing plate 23, a discharge port is arranged on one side of the box body 721, a cylinder or a hydraulic cylinder and a push plate structure can be arranged in the box body 721, and under the action of the push plate, the rivet nut falls into the finished product box 73 from the discharge port.

[0077] Referring to Figure 1 and Figure 15As shown, the blanking machine 8 in the present application is used to intermittently drop the blank for making the rivet nut, so that the blank falls into the conveying disc 2 located below the blanking machine 8. The blanking machine 8 can adopt the related structure in the prior art, as long as it can drop the blank into the conveying disc 2. In the embodiment of the present application, a blanking machine 8 is also provided, which comprises a cutting mechanism and a selecting mechanism 81. The cutting mechanism is used to cut the raw material to form a plurality of blanks in sections. The selecting mechanism 81 comprises a guide block 813, a plurality of first blowing members 811 and second blowing members 812. The ends of the first blowing members 811 and the second blowing members 812 are connected with air inlet pipes. The guide block 813 is provided with a sliding member channel 814 for guiding the blank to the conveying disc 2. The outlet of the sliding member channel 814 is located above the conveying device 1. The first blowing members 811 are located at the top of the sliding member channel 814. The blowing direction of the first blowing members 811 is set to the beginning end of the sliding member channel 814. The second blowing members 812 are arranged at the end of the sliding member channel 814. After the blanking of the blanking machine 8, the air inlet pipes continuously supply air to the first blowing members 811 and the second blowing members 812, so that the first blowing members 811 continuously blow the blank falling on the top of the selecting mechanism 81 into the sliding member channel 814. When the processed part 9 falls into the sliding member channel 814, it slides along the sliding member channel 814 until it reaches the end and is blown by the second blowing members 812 to the outlet of the sliding member channel 814 and falls into the conveying disc 2.

[0078] The implementation principle of the rivet nut automatic production equipment is as follows: when the equipment is running, the pipe material raw material is loaded into the blanking machine 8, the blanking machine 8 cuts the pipe material raw material into a blank, and the blank is transported to the blanking hole 25 of the conveying disc 2 through the material selecting mechanism 81. The conveying disc 2 is transported to the cold header 3 by the transmission assembly 11, the upper die 31 of the cold header 3 presses down the part to be processed 9, the supporting spring in the conveying disc 2 is retracted so that the part to be processed 9 is pushed into the lower die 32, the top rod 324 of the lower die 32 is pressed down, the cold heading is completed, the upper die 31 is lifted after the cold heading is completed, the top rod 324 is lifted with the upper die 31, and the part to be processed 9 after the cold heading is pushed into the conveying disc 2 again. Then it is transported to the threading machine 4 for processing. When threading, the first moving assembly 411 drives the tapping assembly 412 to press down, the first power member 4121 provides power for the drill bit 4122, the inside of the lower end of the part to be processed 9 is tapped to form an internal thread through the drill bit 4122, and in this process, the clamping device 42 is used to clamp the part to be processed 9. After tapping is completed, the first moving assembly 411 drives the tapping assembly 412 to lift, the clamping device 42 is loosened, the clamping device 42 is lowered, and the conveying disc 2 sends the part to be processed 9 to the heat treatment device 5. When heat treatment, the third moving assembly 51 drives the heating machine 52 to press down, the heating ring 521 is sleeved on the outer periphery of the part to be processed 9, the part to be processed 9 is heated to an austenitic state, and then the conveying disc 2 brings the part to be processed 9 to the cooling position below, sprays the cooling liquid to the part to be processed 9 through the liquid nozzle 531, and cools the part to be processed 9 to a martensitic state. The conveying disc 2 transports the part to be processed 9 to the sand blasting machine 6, sprays the sand to the part to be processed 9 through the nozzle 62, and strengthens the surface strength and smoothness of the part to be processed 9. Finally, the conveying disc 2 transports the part to be processed 9 to the receiving box 72, the ejecting assembly 71 abuts against the bottom end of the part to be processed 9, the part to be processed 9 is pushed out, the upper end of the part to be processed 9 is inserted by the lifting fork 722, when the part to be processed 9 is separated from the ejecting assembly 71, the pushing plate 23 pushes the part to be processed 9 to slide along the lifting fork 722 until the part to be processed 9 falls into the box body 721, and finally falls into the finished product box 73, and the processing and collection of the rivet nut are completed.

[0079] The above are optional embodiments of the present application, and do not limit the protection scope of the present application, so that: any equivalent changes made according to the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. An automatic production apparatus for a rivet nut, characterized by: The device comprises a conveying device (1) and a blanking machine (8), a cold heading machine (3), a threading machine (4), a heat treatment device (5), a sand blasting machine (6) and a collecting device (7) arranged along a conveying path of the conveying device (1) in sequence; The conveying device (1) is provided with a plurality of conveying plates (2), each of which comprises a frame (26), a cover plate (27), a plurality of support plates (21) and a plurality of elastic members (22). The plurality of support plates (21) are arranged in the frame (26) in a coplanar manner. The plurality of elastic members (22) are located in the gaps between the plurality of support plates (21) and the frame (26). The elastic members (22) connect the support plates (21) and the frame (26), so that the edges of the plurality of support plates (21) are in contact under the action of the elastic members (22). The cover plate (27) is located above the plurality of support plates (21) and connected with the frame (26). There is a gap between the cover plate (27) and the support plates (21). The middle part of the cover plate (27) is provided with a blanking hole (25). The conveying device (1) comprises a transmission assembly (11), a support frame (12) and a plurality of retaining frames (13). The transmission assembly (11) is located at the top of the support frame (12). The plurality of retaining frames (13) are arranged around the transmission assembly (11) at the top of the support frame (12). The transmission assembly (11) comprises an inner transmission ring (112), an outer transmission ring (111), a plurality of inner transmission wheels (113) and a plurality of outer transmission wheels (114). The inner transmission wheels (113) and the outer transmission wheels (114) are located at the top of the support frame (12). The inner transmission ring (112) is located above the plurality of inner transmission wheels (113). The outer transmission ring (111) is located above the plurality of outer transmission wheels (114). The inner transmission ring (112) and the outer transmission ring (111) are coaxially arranged. The inner transmission ring (112) and the outer transmission ring (111) rotate around their own axes under the action of the inner transmission wheels (113) and the outer transmission wheels (114). The conveying plate (2) is located between the inner transmission ring (112) and the outer transmission ring (111) and connected with the inner transmission ring (112) and the outer transmission ring (111). Part of the plurality of retaining frames (13) is located on the inner side of the inner transmission ring (112) and uniformly distributed along the circumference of the inner transmission ring (112). The other part of the plurality of retaining frames (13) is located on the outer side of the outer transmission ring (111) and uniformly distributed along the circumference of the outer transmission ring (111). The holder (13) comprises a base (131) and rollers (132), the base (131) is installed on the top of the support frame (12), and the rollers (132) are located on the top of the base (131); the rollers (132) of the holder (13) located on the inner side of the inner transmission ring (112) are in abutment with the inner wall of the inner transmission ring (112), and the rollers (132) of the holder (13) located on the outer side of the outer transmission ring (111) are in abutment with the outer wall of the outer transmission ring (111); The outer wall of the inner transmission ring (112) is provided with a plurality of inner transmission ring holes (1121), the inner wall of the outer transmission ring (111) is provided with a plurality of outer transmission ring holes (1111), and the side close to the inner transmission ring (112) and the side close to the outer transmission ring (111) of the transmission disc (2) are both provided with a plurality of mounting rods (24), which are inserted into the corresponding inner transmission ring holes (1121) or the corresponding outer transmission ring holes (1111).

2. The rivet nut automatic production apparatus according to claim 1, characterized by: The cold header (3) comprises an upper die (31) and a lower die (32), the upper die (31) is located above the conveying device (1), the lower die (32) is located below the conveying device (1), the upper die (31) and the lower die (32) can independently move relative to each other, the center of the lower die (32) is provided with a lifting rod (324) for lifting the part to be processed (9), and the bottom of the lifting rod (324) is provided with a lifting spring (325).

3. The lock nut automatic production apparatus according to claim 1, characterized by: The collecting device (7) comprises a lifting assembly (71) and a collecting box (72), the lifting assembly (71) is located below the conveying device (1), the lifting assembly (71) comprises a lifting plate (711), a plurality of lifting springs (712) and a fixing pile (713), the lifting springs (712) are located on the top of the fixing pile (713), the lifting plate (711) is obliquely arranged on the top of the lifting springs (712), the lifting plate (711) is arranged along the conveying direction of the conveying device (1), and one end of the lifting plate (711) close to the sand blasting machine (6) is lower than the other end away from the sand blasting machine (6).

4. The lock nut automatic production apparatus according to claim 3, characterized by: The collecting box (72) comprises a box body (721) and a lifting fork (722), the lifting fork (722) is located above the conveying device (1), the box body (721) is located at the end of the lifting fork (722), and the upper surface of the disc frame (26) is provided with a pushing plate (23); when the transmission disc (2) is located between the collecting box (72) and the sand blasting machine (6), the blanking hole (25) is located on the side away from the sand blasting machine (6) of the pushing plate (23), and the lifting fork (722) is used for receiving the part to be processed (9) lifted by the lifting plate (711) and guiding the part to be processed (9) into the box body (721) under the action of the pushing plate (23).

5. The lock nut automatic production apparatus according to claim 4, characterized by: The side of the box (721) is provided with a finished product box (73), the middle of the starting piece fork (722) is provided with a strip-shaped through groove (7221), the strip-shaped through groove (7221) is arranged along the length direction of the starting piece fork (722), and the side of the box (721) is provided with an opening, and the finished product box (73) is located below the opening of the box (721).

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