A stationary indexable warm riveting device

Abstract

The utility model discloses a fixed type can be indexed warm riveting device, the shock absorbing bolt sleeve is connected in rectangular base plate step hole, the column is in the left side of rectangular base plate, two pieces mirror image symmetry, the small end of the hinge shaft both sides is connected to the upper side mounting hole of column, the big end of hinge shaft is connected to the half worm wheel center hole, the half worm wheel is engaged with right side worm shaft, and the half worm wheel flat end is connected to the right side of warm riveting mechanism, and the both small ends of worm shaft are connected to two bearings, and two bearings are connected to support bearing hole, and the upper end of worm shaft passes through bearing hole and is connected to motor speed reducer, and the support is connected to the right side of rectangular base plate. The utility model avoids the defect produced by cold rolling and hot rolling by drawing lessons from warm forging technology, and reduces the extrusion pressure and resilience when riveting, the shock absorbing bolt is decomposed stress through spherical surface and taper surface, the worm shaft has the shock absorption of similar nylon pin, can effectively reduce the shock, improves the riveting stability, especially the stability when beveling.

Description

Technical Field

[0001] This utility model relates to the field of riveting equipment, specifically to a repositionable riveting device. Background Technology

[0002] Cold riveting machines are a new type of riveting equipment developed based on the principle of cold rolling. They are usually fixed in place, making it difficult to rivet in tight corners and nooks when riveting large workpieces, thus limiting their applicability. Furthermore, existing devices are inconvenient to move as a whole, making operation difficult and reducing the practicality of the device. Although a few riveting machines have mobility, when riveting solid steel rivets, the high hardness and strength of the rivets and their large spring force result in significant compressive and spring force during riveting, which can easily cause shaking. This is especially true when riveting large workpieces, as the large workpieces are difficult to rotate and can only be riveted at an angle. When riveting at an angle, the riveting machine also has to bear the off-center load from the large workpiece, making the shaking problem particularly prominent and the stability poor. Mobile riveting machines even have the risk of tipping over.

[0003] Cold riveting inherits the defects of cold rolling, such as elastic rebound. During riveting, the compressive stress needs to be increased to prevent elastic rebound, but excessive compressive stress can cause defects such as extrusion cracking. Hot riveting machine riveting has relatively small compressive stress, low risk of extrusion cracking, and small elastic rebound. However, hot riveting also inherits the defects of hot rolling, such as oxidation, decarburization, and annealing effect. Especially when riveting large workpieces, it is difficult to squeeze the large workpieces together with the heating equipment. In order to prevent the heated rivets from cooling during transportation, the preheating temperature is often increased, which can easily cause overheating. Especially in winter, when the temperature is low, the rivets cool down quickly, and insulation measures need to be added during transportation.

[0004] To address the above issues, some factories choose to anneal and then cold rivet large solid steel rivets. While annealing improves the rivet's plasticity, reduces the extrusion and springback forces during riveting, and enhances the stability of the riveting process, it also reduces the rivet's rigidity and strength, directly affecting the connection strength. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the existing technology, draw on warm forging technology, avoid the defects caused by cold rolling and hot rolling, and introduce a fixed indexable warm riveting device with moderate extrusion stress and better stability.

[0006] This utility model is a fixed, indexable, temperature-controlled riveting device, comprising: a rectangular base plate, shock-absorbing bolts, columns, a temperature-controlled riveting mechanism, a semi-worm gear, a hinge shaft, a worm shaft, a motor reducer, bearings, and a support; the shock-absorbing bolts are fitted into four right-angled inner stepped holes on the rectangular base plate; the columns are located on the left side of the rectangular base plate, with two columns arranged symmetrically in a mirror image, the lower ends of the two columns connected to the rectangular base plate, and the upper mounting holes respectively fitted into the small ends of the hinge shaft, with the inner sides located at the shoulders of the large ends of the hinge shaft; the large end of the hinge shaft is fitted into the center hole of the semi-worm gear for a fixed connection; the outer meshing teeth of the semi-worm gear mesh with the worm in the middle of the right worm shaft, and the flat end of the semi-worm gear is connected to the right side of the riveting die bracket of the temperature-controlled riveting mechanism; the upper and lower small ends of the worm shaft are respectively fitted into the inner holes of two bearings, and the outer rings of the two bearings are fitted into the bearing holes at the upper and lower ends of the left side of the support; the upper small end of the worm shaft passes through the bearing hole on the support and connects to the motor reducer; the support is located on the right side of the rectangular base plate, with its lower side centered and connected to the rectangular base plate.

[0007] The rectangular base plate has stepped holes on the four right-angled inner sides. The upper side of the stepped hole is a 120° conical hole, and the lower side is a cylindrical hole.

[0008] The shock-absorbing bolt includes: a lock nut, a flat washer, a shock-absorbing rubber pad, a spherical washer, and an anchor bolt; the lower side of the anchor bolt is embedded in the floor, the middle section is fitted into the cylindrical hole below the stepped hole of the rectangular base plate, the upper threaded end is fitted with the spherical washer, the shock-absorbing rubber pad is located above the spherical washer and fitted onto the threaded end of the anchor bolt; the flat washer is located above the shock-absorbing rubber pad and fitted onto the threaded end of the anchor bolt; the lock nut is located above the flat washer and fitted onto the threaded end of the anchor bolt.

[0009] The spherical washer is made of glass fiber filled nylon, with its lower spherical surface fitting the upper conical hole of the stepped hole in the rectangular base plate; and its upper side fitting a shock-absorbing rubber pad.

[0010] The upper side of the column is provided with a centering hinge hole, and the two columns are mirror-symmetrical along the hinge shoulder.

[0011] The temperature riveting mechanism includes: a riveting die bracket, a connecting sleeve, a hydraulic press, a punch sleeve, graphite filler, a pressure plate, spring washers, screws, a riveting die punch, a distribution box, a temperature control switch, a fixed riveting die, a workpiece, and rivets; the lower side of the inner hole of the punch sleeve is fitted with the riveting die punch for a fixed connection, the upper side of the inner hole is fitted with the lower end push rod of the hydraulic press for a fixed connection, and the outer edge is fitted with the upper small end of the stepped hole on the upper side of the riveting die bracket, forming a sliding pair; the outer edge of the upper graphite filler is fitted with the lower large end of the stepped hole on the upper side of the riveting die bracket. The inner hole of the end is fitted with the riveting die punch and connected to the distribution box via an electrical wire; the upper pressure plate is located below the upper graphite filler, with the annular step of the upper pressure plate facing upwards, fitting onto the large end of the lower side of the upper step hole of the riveting die bracket, with screws evenly distributed in a ring on the outer side of the annular step of the pressure plate; the lower end of the screw thread is fitted with a spring washer, and the upper end passes through the mounting hole on the outer side of the annular step of the pressure plate, fitting onto the annularly distributed screw holes on the outer side of the large end of the upper step hole of the riveting die bracket, pressing the spring washer against the outer side of the upper pressure plate; the lower end of the connecting sleeve is fixed. Connected to the outside of the stepped hole on the upper side of the rivet die bracket, the upper end is fixedly connected to the lower end of the outer edge of the hydraulic press; the outer edge of the lower graphite packing is sleeved on the upper large end of the stepped hole on the lower side of the rivet die bracket, and the inner hole is sleeved to fix the rivet die, and connected to the distribution box through wires; the lower pressure plate is located on the upper side of the lower graphite packing, the annular step of the lower pressure plate faces downward, and is sleeved on the upper large end of the stepped hole on the lower side of the rivet die bracket; screws are evenly distributed in a ring on the outside of the annular step of the pressure plate, the upper end of the screw thread is sleeved with a spring washer, and the lower end passes through the pressure plate. The outer side of the annular step is fitted with a screw hole that is evenly distributed in an annular pattern on the outer side of the large end of the step hole on the lower side of the riveting die bracket. The spring washer is pressed on the outer side of the lower pressure plate. The temperature control switch is built into the small end of the lower step hole on the lower side of the riveting die bracket and the middle hole of the fixed riveting die. The upper temperature probe is located at the opening of the middle hole of the fixed riveting die. The lower end of the rivet is centered at the center of the upper end of the fixed riveting die, the middle section is fitted into the rivet hole of the workpiece, and the upper end is located on the upper side of the rivet hole of the workpiece. The right end of the riveting die bracket is centered and fixedly connected to the flat end of the semi-worm gear.

[0012] The riveting mold support is a channel steel structure. The upper stepped hole is larger at the bottom and smaller at the top, while the lower stepped hole is smaller at the bottom and larger at the top. The two stepped holes are centered on each other, and both stepped holes are covered with an insulating layer. The lower outer side of the upper stepped hole is provided with annular evenly distributed screw holes, and the upper outer side of the lower stepped hole is provided with annular evenly distributed screw holes.

[0013] The pressure plate is a central hole plate assembly with a centered annular step on the inner side and a flat end on the outer side. The annular step has evenly distributed annular mounting holes on its outer side. The mounting holes of this utility model are evenly distributed in four places. The pressure plate consists of two pieces, with their annular steps respectively fitted onto the lower large end of the upper step hole and the upper large end of the lower step hole of the riveting mold bracket.

[0014] The lower end of the rivet punch is matched with the rivet and is made of M2 high-speed steel, which has a lower resistivity than most carbon steels.

[0015] The distribution box is the power supply for the pressure welding machine.

[0016] The fixed riveting die has a straight through hole and is fitted with an upper rivet. Its material is M2 high-speed steel, which has a lower resistivity than most carbon steels.

[0017] The worm shaft has a toroidal worm in the middle and smooth rods on both sides. Bearings are sleeved on the small ends of the smooth rods on both sides, and the upper small end is connected to the motor reducer. The toroidal worm in the middle is made of carbon fiber / glass fiber mixed filled reinforced nylon 1010, with a carbon fiber content of 5% and a glass fiber content of 15%.

[0018] The support includes: a stiffening plate, a worm gear support, and a connecting plate; the lower side of the connecting plate is centered and connected to the upper right side of the rectangular base plate; the lower end of the worm gear support is connected to the upper side of the connecting plate, and the bearing hole of the worm gear support is centered with the bearing hole of the connecting plate; the upper end of the stiffening plate is connected to the upper right side of the worm gear support, and the lower end is connected to the upper right side of the connecting plate.

[0019] The connecting plate has a bearing hole in the center of its left side.

[0020] The worm gear support is an L-plate, with a bearing hole on the upper left flat end that aligns with the bearing hole of the connecting plate.

[0021] The working principle of this utility model is as follows: When riveting steel rivets, the workpiece is first lifted by an overhead crane and placed on a fixed riveting die. The rivet is then aligned. The hydraulic press is started at low pressure to press the riveting die punch onto the top of the steel rivet. After the steel rivet is tightened, the electrical distribution box connects to the upper end of the rivet via the upper graphite filler, punch sleeve, and riveting die punch. The electrical distribution box also connects to the lower end of the rivet via the lower graphite filler and the fixed riveting die, forming a closed circuit to heat the steel rivet. The resistivity of the upper and lower graphite fillers is much lower than that of the steel rivet, and their electrothermal conversion rate is also much lower. The cross-sections of the punch sleeve and riveting die punch are much larger than the cross-section of the steel rivet, and the cross-section of the fixed riveting die is also much larger than that of the steel rivet. The riveting die punch and the fixed riveting die are made of low-resistivity M2 high-speed steel to ensure that their resistivity is lower than that of the rivet, their electrothermal conversion rate is much lower than that of the steel rivet, and their heating rate is also lower than that of the steel rivet. The manufacturing process ensures that the working temperature of the rivet punch and fixed rivet during warm riveting is lower than that of the steel rivet, further guaranteeing its hot hardness. This is especially true for hollow steel rivets, which have a smaller cross-section, higher resistivity, and faster heating, resulting in a greater temperature difference between them and the rivet punch and fixed rivet during warm riveting. When carbon steel rivets reach 350℃~400℃, their hardness and rigidity begin to decrease. At this point, the temperature control switch cuts off the power supply to the distribution box, the hydraulic press starts at high pressure, and the rivet punch warm-forges and flangs the top of the steel rivet, effectively reducing the extrusion force and springback force during riveting. Because chromium steel has higher hot hardness than carbon steel, chromium steel rivets need to be heated to 400℃~450℃ during warm forging. However, chromium steel has a higher resistivity than carbon steel, especially high-chromium stainless steel, whose resistivity can even reach 5 times that of low-carbon steel, resulting in faster heating. Appropriately increasing the warm riveting temperature can also prevent overheating of components such as the rivet punch and fixed rivet.

[0022] Copper and aluminum rivets have lower hardness and rigidity than steel rivets, and their compressive force and springback force during riveting are also lower than those of steel rivets. This invention can be directly cold riveted during riveting.

[0023] The motor reducer drives the worm shaft to rotate, which in turn drives the half-worm wheel to rotate. This, in turn, links the left-side warm riveting mechanism of the half-worm wheel to deflect by ±60°, allowing for oblique riveting according to the workpiece structure. The middle part of the worm shaft is a toroidal worm, which is arc-shaped and has its tooth surface wrapping around the worm wheel to form a "semi-enclosed" structure. During meshing, the contact line is closer to being perpendicular to the sliding direction, enabling surface or line contact. The contact area is larger than that of a cylindrical worm, resulting in a more uniform distribution of contact stress and higher load-bearing capacity. The middle toroidal worm is made of carbon fiber / glass fiber mixed-filled reinforced nylon 1010, which has both the mechanical strength of a steel worm and the shock absorption properties similar to nylon pins.

[0024] The screws pass through the mounting holes on the upper and lower pressure plates and are fitted into the screw holes on the outer side of the large end of the stepped holes on the upper and lower sides of the rivet die bracket. The spring washers are pressed against the outer side of the upper and lower pressure plates. The rebound force of the spring washers squeezes the graphite filler in the stepped holes on the upper and lower sides through the annular steps of the pressure plates, causing it to expand laterally. This allows for better fit of the stepped holes and fixation of the rivet die and punch sleeve. The outer edge of the punch sleeve and the upper stepped hole of the rivet die bracket form a sliding pair. Wear occurs during sliding. After the graphite filler in the upper stepped hole of the rivet die bracket wears down, it will expand laterally under the pressure of the spring washers through the annular steps of the pressure plates, offsetting the wear. When the graphite filler wears down, the detached graphite particles can also act as a solid lubricant, reducing the wear of the punch sleeve and the upper stepped hole of the rivet die bracket.

[0025] The shock-absorbing bolts are fitted into the four right-angled inner stepped holes of the rectangular base plate. The spherical washers are made of fiberglass-filled nylon, which has the shock-absorbing effect of nylon pins. The spherical surface of the lower side of the spherical washer fits into the conical hole on the upper side of the stepped hole of the rectangular base plate, and the upper side is fitted with a shock-absorbing pad. When the oblique riveting causes shaking, the spherical surface of the lower side of the spherical washer and the conical hole on the upper side of the stepped hole of the base plate first decompose part of the lateral impact that causes shaking into a longitudinal load through the spherical surface and the conical surface, and then transfer the longitudinal load to the shock-absorbing pad for buffering and shock absorption, which can effectively reduce shaking.

[0026] Compared with the existing technology, the present invention has the following advantages: This invention is a warm riveting method, which draws on warm forging technology and avoids the defects of hot riveting and cold riveting. This invention uses a distribution box for power supply, and heats the carbon steel rivets to 350℃~400℃ and the chromium steel rivets to 400℃~450℃ before warm riveting. Both are within the medium-temperature tempering range, which is much lower than the annealing temperature. This can reduce the extrusion force and springback force during riveting, improve the stability of the riveting process, and avoid the decrease in the rigidity and strength of the rivets after riveting, thus effectively ensuring the connection strength.

[0027] This invention offers superior riveting stability: It employs a warm riveting method, reducing compressive and rebound forces during riveting. The spherical washer of the shock-absorbing bolt has its lower spherical surface fitted to the upper conical hole of the stepped hole in the rectangular base plate, with a shock-absorbing pad attached to the upper side. When oblique riveting causes shaking, the lower spherical surface of the washer and the upper conical hole of the stepped hole in the base plate first decompose part of the lateral impact causing the shaking into a longitudinal load through the spherical-conical surface, and then transfer the longitudinal load to the shock-absorbing pad for buffering and damping, effectively reducing shaking. The worm shaft has a toroidal worm in the middle, resulting in a more uniform contact stress distribution and higher load-bearing capacity. The toroidal worm in the middle is made of carbon fiber / glass fiber mixed-filled reinforced nylon 1010, possessing both the mechanical strength of a steel worm and the shock-absorbing properties similar to a nylon pin, effectively improving riveting stability.

[0028] This invention offers superior safety: It employs a temperature control switch to maintain the riveting temperature of the steel rivet between 350℃ and 450℃, which is lower than the ignition point of the graphite filler (600℃). Furthermore, the resistivity of the graphite filler, punch sleeve, riveting die punch, and fixed riveting die are all lower than that of the steel rivet, resulting in a significantly lower electrothermal conversion rate and heating speed. This ensures that the working temperature of the graphite filler, punch sleeve, riveting die punch, and fixed riveting die during riveting is lower than that of the steel rivet.

[0029] The graphite filler of this invention can automatically compensate for wear: The screw of this invention passes through the mounting hole of the upper pressure plate and is fitted into the screw hole on the outer side of the large end of the upper step hole of the rivet die bracket, pressing the spring washer on the outer side of the upper pressure plate. The rebound force of the spring washer squeezes the graphite filler in the upper step hole of the rivet die bracket through the annular step of the pressure plate, causing it to expand laterally. After the graphite filler in the upper step hole of the rivet die bracket is worn, it will expand laterally under the compression of the annular step of the pressure plate by the rebound force of the spring washer, thus offsetting the wear.

[0030] This invention can better replace welding with riveting: it can be warm forged, which can effectively ensure the rigidity and strength of the rivet and ensure the connection strength; it can better realize the replacement of welding with riveting, reduce high radiation processes, and better protect the health of producers; and it can greatly reduce power consumption, saving energy and reducing consumption.

[0031] This invention has good shock absorption: the spherical washer is fitted with the upper conical hole of the stepped hole on the rectangular base plate, and the upper side is fitted with a shock-absorbing rubber pad. The spherical and conical surfaces decompose part of the axial impact into lateral load and part of the lateral impact into axial load. The spherical washer is made of glass fiber filled nylon, which has the shock absorption effect of nylon pins. Together with the shock-absorbing rubber pad, it forms a two-stage shock absorption system.

[0032] This invention has good friction reduction properties: when the graphite filler in the upper stepped hole of the rivet die bracket wears, the detached graphite particles can also act as a solid lubricant, achieving a self-lubricating effect and reducing the wear of the punch sleeve and the upper stepped hole of the rivet die bracket. Attached Figure Description

[0033] Figure 1 A schematic diagram of the structure of this utility model; Figure 2 Left view schematic diagram of this utility model; Figure 3 Schematic diagram of the shock-absorbing bolt structure of this utility model; Figure 4 Schematic diagram of the riveting mold support structure of this utility model; Figure 5 Schematic diagram of the semi-worm gear structure of this utility model; Figure 6 Schematic diagram of the support structure of this utility model. Detailed Implementation

[0034] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 As shown, this utility model is a fixed indexable warm riveting device, including: a rectangular base plate 1, shock-absorbing bolts 2, columns 3, a warm riveting mechanism 4, a semi-worm gear 5, a hinge shaft 6, a worm shaft 7, a motor reducer 8, a bearing 9, and a support 10; the shock-absorbing bolts 2 are sleeved in four right-angled inner stepped holes on the rectangular base plate 1; the columns 3 are located on the left side of the rectangular base plate 1, with two columns arranged symmetrically in a mirror image, the lower ends of the two columns 3 are connected to the rectangular base plate 1, and the upper mounting holes are respectively sleeved on the small ends of the hinge shaft 6, with the inner side located at the shoulder positions on both sides of the large end of the hinge shaft 6; The large end of the hinge shaft 6 is centered and sleeved into the central hole of the half worm gear 5 for fixed connection; the outer circle meshing teeth of the half worm gear 5 mesh with the worm in the middle of the right worm shaft 7, and the flat end of the half worm gear 5 is centered and connected to the right side of the riveting die bracket 4-1 of the warm riveting mechanism 4; the small ends of the upper and lower sides of the worm shaft 7 are respectively sleeved into the inner holes of two bearings 9, and the outer rings of the two bearings 9 are sleeved into the bearing holes at the upper and lower ends of the left side of the support 10; the small end of the upper side of the worm shaft 7 passes through the bearing hole on the support 10 and connects to the motor reducer 8; the support 10 is located on the right side of the rectangular base plate 1, and the lower side is centered and connected to the rectangular base plate 1.

[0035] The rectangular base plate 1 has stepped holes on the four right-angled inner sides. The upper side of the stepped hole is a 120° conical hole, and the lower side is a cylindrical hole.

[0036] The shock-absorbing bolt 2 includes: a locking nut 2-1, a flat washer 2-2, a shock-absorbing rubber pad 2-3, a spherical washer 2-4, and an anchor bolt 2-5; the lower side of the anchor bolt 2-5 is built into the floor, the middle section is sleeved on the cylindrical hole below the stepped hole of the rectangular base plate 1, the upper threaded end is sleeved on the spherical washer 2-4, the shock-absorbing rubber pad 2-3 is located on the upper side of the spherical washer 2-4, and is sleeved on the threaded end of the anchor bolt 2-5; the flat washer 2-2 is located on the upper side of the shock-absorbing rubber pad 2-3, and is sleeved on the threaded end of the anchor bolt 2-5; the locking nut 2-1 is located on the upper side of the flat washer 2-2, and is sleeved on the threaded end of the anchor bolt 2-5.

[0037] The spherical washers 2-4 are made of glass fiber filled nylon, with their lower spherical surfaces fitting the upper conical hole of the stepped hole in the rectangular base plate 1; and their upper surfaces fitting the shock-absorbing rubber pads 2-3.

[0038] The upper side of the column 3 is provided with a centering hinge hole, and the two columns 3 are mirror symmetrical along the shoulder of the hinge 6.

[0039] The riveting mechanism 4 includes: a riveting die support 4-1, a connecting sleeve 4-2, a hydraulic press 4-3, a punch sleeve 4-4, graphite filler 4-5, a pressure plate 4-6, a spring washer 4-7, a screw 4-8, a riveting die punch 4-9, a distribution box 4-10, a temperature control switch 4-11, a fixed riveting die 4-12, a workpiece 4-13, and a rivet 4-14; the lower side of the inner hole of the punch sleeve 4-4 is fitted with the riveting die punch 4-9 for a fixed connection, and the upper side of the inner hole is fitted with the lower push rod of the hydraulic press 4-3 for a fixed connection; the outer edge is fitted onto the upper small end of the stepped hole on the upper side of the riveting die support 4-1, forming a sliding pair; the outer edge of the upper graphite filler 4-5 is fitted onto... The riveting die bracket 4-1 has a large inner hole at the lower end of the upper stepped hole, which is fitted with the riveting die punch 4-9 and connected to the distribution box 4-10 via an electrical wire. The upper pressure plate 4-6 is located below the upper graphite filler 4-5. The annular step of the upper pressure plate 4-6 faces upward and is fitted onto the large inner end of the upper stepped hole of the riveting die bracket 4-1. Screws 4-8 are evenly distributed in a ring on the outside of the annular step of the pressure plate 4-6. The lower end of the threaded end of the screw 4-8 is fitted with a spring washer 4-7, and the upper end passes through the mounting hole on the outside of the annular step of the pressure plate 4-6 and is fitted into the annularly distributed screw holes on the outside of the large inner end of the upper stepped hole of the riveting die bracket 4-1, thus pressing the spring washer 4-7 against the outside of the upper pressure plate 4-6. The lower end of the connecting sleeve 4-2 is fixedly connected to the outside of the upper stepped hole of the rivet die bracket 4-1, and the upper end is fixedly connected to the lower end of the outer edge of the hydraulic press 4-3; the outer edge of the lower graphite filler 4-5 is sleeved on the upper large end of the lower stepped hole of the rivet die bracket 4-1, and the inner hole is sleeved to fix the rivet die 4-12, and is connected to the distribution box 4-10 through wires; the lower pressure plate 4-6 is located on the upper side of the lower graphite filler 4-5, and the lower pressure plate 4-6 has an annular step facing downwards, sleeved on the upper large end of the lower stepped hole of the rivet die bracket 4-1; screws 4-8 are evenly distributed in annularly on the outside of the annular step of the pressure plate 4-6, and the upper end of the threaded end of the screw 4-8 is sleeved with a spring washer 4-7, and the lower end... The screw thread passes through the mounting hole on the outer side of the annular step of the pressure plate 4-6 and is fitted into the annularly distributed screw holes on the outer side of the large end of the lower step hole of the rivet die bracket 4-1. The spring washer 4-7 is pressed onto the outer side of the lower pressure plate 4-6. The temperature control switch 4-11 is built into the small end of the lower step hole of the rivet die bracket 4-1 and the middle hole of the fixed rivet die 4-12. The upper temperature probe is located at the opening of the middle hole of the fixed rivet die 4-12. The lower end of the rivet 4-14 is centered at the center of the upper end of the fixed rivet die 4-12. The middle section is fitted into the rivet hole of the workpiece 4-13, and the upper end is located above the rivet hole of the workpiece 4-13. The right end of the rivet die bracket 4-1 is centered and fixedly connected to the flat end of the semi-worm gear 5.

[0040] The riveting mold bracket 4-1 is a channel steel structure. The upper stepped hole is larger at the bottom and smaller at the top, while the lower stepped hole is smaller at the bottom and larger at the top. The two stepped holes are centered on each other, and both stepped holes are covered with an insulating layer. The lower outer side of the upper stepped hole is provided with an annular evenly distributed screw hole, and the upper outer side of the lower stepped hole is provided with an annular evenly distributed screw hole.

[0041] The lower push rod of the hydraulic press 4-3 is covered with an insulating layer.

[0042] The pressure plate 4-6 is a central hole plate assembly with a centering annular step on the inner side and a flat end on the outer side. The annular step has annularly distributed mounting holes on the outer side. The mounting holes of this utility model are evenly distributed in four places. The pressure plate 4-6 consists of two pieces, with its annular step respectively sleeved on the lower large end of the upper step hole and the upper large end of the upper step hole of the rivet mold bracket 4-1.

[0043] The lower end of the rivet punch 4-9 is matched with the rivet 4-14, and the material is M2 high-speed steel, whose resistivity is lower than that of most carbon steels.

[0044] The power distribution boxes 4-10 are for the pressure welding machine.

[0045] The fixed riveting die 4-12 has a straight through hole, and its upper end is matched with the rivet 4-14. Its material is M2 high-speed steel, which has a lower resistivity than most carbon steels.

[0046] The worm shaft 7 has a toroidal worm in the middle and smooth rods on both sides. The small ends of the smooth rods on both sides are fitted with bearings 9, and the small ends on the upper side are connected to the motor reducer 8. The toroidal worm in the middle is made of carbon fiber / glass fiber mixed filled reinforced nylon 1010, with a carbon fiber content of 5% and a glass fiber content of 15%.

[0047] The support 10 includes: a stiffening plate 10-1, a worm gear support 10-2, and a connecting plate 10-3; the lower side of the connecting plate 10-3 is centered and connected to the upper right side of the rectangular base plate 1; the lower end of the worm gear support 10-2 is connected to the upper side of the connecting plate 10-3, and the bearing hole of the worm gear support 10-2 is centered with the bearing hole of the connecting plate 10-3; the upper end of the stiffening plate 10-1 is connected to the upper right side of the worm gear support 10-2, and the lower end is connected to the upper right side of the connecting plate 10-3.

[0048] The connecting plate 10-3 has a bearing hole in the center of its left side.

[0049] The worm gear support 10-2 is an L-plate, and the upper left flat end is provided with a bearing hole that is aligned with the bearing hole of the connecting plate 10-3.

Claims

1. A fixed, indexable, temperature-controlled riveting device, comprising: The system comprises a rectangular base plate, shock-absorbing bolts, columns, a warm riveting mechanism, a semi-worm gear, a hinge shaft, a worm shaft, a motor reducer, bearings, and a support. The shock-absorbing bolts are fitted into four right-angled inner stepped holes on the rectangular base plate. Two columns are positioned symmetrically on the left side of the rectangular base plate, with their lower ends connected to the rectangular base plate and their upper mounting holes fitted into the small ends of the hinge shaft on both sides. The outer meshing teeth of the semi-worm gear mesh with the worm shaft in the middle of the right side. The small ends of the worm shaft on both sides are fitted into two bearing inner holes, and the outer rings of the two bearings are fitted into the bearing holes at the upper and lower ends of the support on the left side. The small end of the worm shaft on the upper side passes through the bearing hole on the support and connects to the motor reducer. The support is located on the right side of the rectangular base plate, with its lower side centered and connected to the rectangular base plate. The key feature is that the large end of the hinge shaft is centered and fitted into the central hole of the semi-worm gear, and the flat end of the semi-worm gear is centered and connected to the right side of the warm riveting mechanism.

2. The fixed, indexable, temperature-controlled riveting device according to claim 1, characterized in that: The rectangular base plate has stepped holes on the four right-angled inner sides. The upper side of the stepped hole is a 120° conical hole, and the lower side is a cylindrical hole.

3. A fixed, indexable, temperature-controlled riveting device according to claim 1 or 2, characterized in that: The shock-absorbing bolt includes: a lock nut, a flat washer, a shock-absorbing rubber pad, a spherical washer, and an anchor bolt; the spherical washer, the shock-absorbing rubber pad, the flat washer, and the lock nut are fitted onto the threaded end of the anchor bolt. The shock-absorbing rubber pad is located on the upper side of the spherical washer, the flat washer is located on the upper side of the shock-absorbing rubber pad, and the lock nut is located on the upper side of the flat washer.

4. A fixed, indexable, temperature-controlled riveting device according to claim 3, characterized in that: The temperature riveting mechanism includes: a riveting die bracket, a connecting sleeve, a hydraulic press, a punch sleeve, graphite filler, a pressure plate, spring washers, screws, a riveting die punch, a distribution box, a temperature control switch, a fixed riveting die, a workpiece, and rivets. The outer edge of the upper graphite filler is sleeved on the lower large end of the upper stepped hole of the riveting die bracket, and the inner hole is sleeved on the riveting die punch, and connected to the distribution box via wires. The upper pressure plate is located below the upper graphite filler, with the annular step of the upper pressure plate facing upwards, and is sleeved on the lower large end of the upper stepped hole of the riveting die bracket. Screws are evenly distributed in a ring on the outer side of the annular step of the pressure plate. The lower end of the screw thread is sleeved with a spring washer, and the upper end passes through the mounting hole on the outer side of the annular step of the pressure plate and is sleeved on the annularly distributed screw holes on the outer side of the upper stepped hole of the riveting die bracket, pressing the spring washer against the upper pressure plate. The outer side; the outer edge of the lower graphite packing is sleeved on the upper large end of the lower step hole of the rivet die bracket, and the inner hole is sleeved on the fixed rivet die, and connected to the distribution box through the wire; the lower pressure plate is located on the upper side of the lower graphite packing, the lower pressure plate has an annular step facing downwards, sleeved on the upper large end of the lower step hole of the rivet die bracket, the screws are evenly distributed in annular on the outer side of the annular step of the pressure plate, the upper end of the screw thread is sleeved with a spring washer, the lower end passes through the mounting hole on the outer side of the annular step of the pressure plate, and is sleeved on the annularly distributed screw holes on the outer side of the lower step hole of the rivet die bracket, pressing the spring washer on the outer side of the lower pressure plate; the temperature control switch is built into the lower small end of the lower step hole of the rivet die bracket and the middle hole of the fixed rivet die, and the upper temperature probe is located at the opening of the middle hole of the fixed rivet die; the right end of the rivet die bracket is centered and connected to the flat end of the semi-worm gear.

5. A fixed, indexable, temperature-controlled riveting device according to claim 4, characterized in that: The riveting mold support is a channel steel structure. The upper stepped hole is larger at the bottom and smaller at the top, while the lower stepped hole is smaller at the bottom and larger at the top. The two stepped holes are centered on each other, and both stepped holes are covered with an insulating layer. The lower outer side of the upper stepped hole is provided with annular evenly distributed screw holes, and the upper outer side of the lower stepped hole is provided with annular evenly distributed screw holes.

6. A fixed, indexable, temperature-controlled riveting device according to claim 5, characterized in that: The pressure plate is a central hole plate assembly with a centered annular step on the inner side and a flat end on the outer side. The annular step has evenly distributed annular mounting holes on its outer side.

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