An automatic cutting and riveting device, riveting equipment and method for a silicon steel sheet iron core

Abstract

The present invention provides an automatic cutting and riveting device, a riveting equipment and a method for a silicon steel sheet core, which are characterized in that it includes: at least one rivet wire unit for the placement and release of a whole coil of rivet wire, including a rivet wire base, an adjustable rivet wire clamping rod assembly, an adjustable rivet wire guiding rod assembly, a wire feeding power assembly, and a wire feeding control assembly; a wire feeding unit for pressing and straightening the released rivet wire and pushing the rivet wire to ensure the continuity of the rivet wire at the cutting position, including a wire pressing assembly and a wire pushing assembly; a cutting unit for cutting the rivet wire into rivets of a specific size, including a cutting and pressing assembly, a cutting tool assembly, and a cutting power assembly; a rivet pushing unit for pushing the rivets into the rivet holes of the workpieces to be riveted, including a thimble, a thimble cylinder, a connecting piece, and a detection assembly; the present invention can adapt to the cutting and riveting of rivets with different lengths and different diameters, and the whole process is automated, improving the riveting efficiency and ensuring the riveting quality.

Description

Technical Field

[0001] The present invention relates to the technical field of riveting assembly, and in particular to an automatic cutting rivet device, a riveting device and a method for a silicon steel sheet iron core. Background Art

[0002] Riveting is a common connection method that realizes the connection of workpieces by passing a rivet of a certain length through a rivet hole of a certain diameter on the workpiece to be connected and then compressing the rivet. However, if the rivet is too long, the rivet point will be too large or the workpiece cannot be compacted; if the rivet is too short, riveting cannot be achieved; if the gap between the rivet and the rivet hole on the workpiece is too large, the workpiece will swing; if the gap is too small or the dimensions do not match, the rivet is difficult to pass through the rivet hole, etc. That is, specific rivets are required for riveting. In the traditional riveting process, when riveting different workpieces, it is necessary to clean the rivets in the riveting system first and then replace the required rivets. This method has low efficiency and poor adaptability, and there is no detection of the length of the rivets and the thickness of the workpieces, etc. The quality of riveting cannot be guaranteed, especially for workpieces such as silicon steel sheet iron cores for contactors that have multiple rivet points and high requirements for riveting. Therefore, how to improve the efficiency of riveting, make the riveting device adaptable to rivets of different lengths and diameters, and ensure the quality of riveting has become a technical problem that needs to be solved urgently by those skilled in the art. Summary of the Invention

[0003] Based on the above technical problems, the present invention provides an automatic cutting rivet device for a silicon steel sheet iron core. The whole coil of riveting wire with the same or different diameters is placed in the device, and after the riveting wire is pressed and straightened, it is cut according to the required use length to adapt to different riveting requirements, and the length of the cut rivets is detected to ensure the quality of riveting.

[0004] The present invention also provides an automatic riveting device and method for a silicon steel sheet iron core. The workpiece to be riveted is transported to the detection station to detect the thickness of the workpiece, and the workpieces that do not meet the thickness requirements are removed. The cut rivets are pushed into the rivet holes of the workpieces, and then the rivets are compacted to complete the riveting. The whole process is automated, improving the production efficiency and the product qualification rate.

[0005] To achieve the above technical objectives, the present invention adopts the following technical solutions.

[0006] An automatic cutting rivet device for a silicon steel sheet iron core, characterized by comprising:

[0007] At least one riveting wire unit for placing and releasing the whole coil of riveting wire;

[0008] A wire feeding unit for pressing and straightening the released riveting wire and advancing the riveting wire to ensure the continuity of the riveting wire at the cutting position;

[0009] A cutting unit for cutting the riveting wire into rivets of a specific size;

[0010] The rivet unit is used to push the rivet into the rivet hole of the workpiece to be riveted.

[0011] Furthermore, the rivet wire unit comprises:

[0012] A rivet base, used to provide a mounting base for the rivet unit;

[0013] An adjustable rivet clamping rod assembly is installed on the upper end of the rivet base and is used to clamp a whole plate of rivets of different sizes;

[0014] An adjustable rivet wire guide rod assembly is installed on the upper end of the rivet wire base and is used to guide a single rivet wire after the rivet wire disc is released;

[0015] A wire-exiting power assembly is installed at the lower end of the rivet wire base, one end of which passes through the rivet wire base and is movably connected to the adjustable rivet wire clamping rod assembly to provide power for releasing the rivet wire disc;

[0016] The wire-exit control assembly is installed at the upper end of the rivet base and is used to control the operation or stop operation of the wire-exit power assembly.

[0017] Furthermore, the wire-extracting power assembly comprises:

[0018] A motor is installed at the lower end of the rivet wire base, and its shaft end passes through the rivet wire base, and is used to provide power for releasing the rivet wire disc;

[0019] The friction disk is fixed on the motor shaft and is used to resist the inertia force after the motor stops rotating to avoid excessive release of the rivet wire disk;

[0020] The compression spring assembly is fixed on the motor shaft and is used to compress the friction disc.

[0021] Furthermore, the wire outlet control assembly comprises:

[0022] A bracket, mounted on the upper end of the rivet base;

[0023] A rotatable component is mounted on the bracket and can rotate when subjected to force;

[0024] A wire inlet contact switch is mounted on the bracket, on one side of the rotatable component, and when the switch is triggered, the wire outlet power component starts to work;

[0025] A stop contact switch is mounted on the bracket, on the other side of the rotatable component opposite to the wire-in contact switch, and when the stop contact switch is triggered, the wire-out power component stops working;

[0026] The elastic guide screw rod has one end passing through the rotatable component and fixed to the rotatable component, and the other end being in movable contact with the riveting wire. When the tension at the contact end with the riveting wire exceeds its elastic range, it pulls the rotatable component to rotate, and the other end triggers the wire feeding contact switch. When the tension at the contact end with the riveting wire returns to its elastic range, it pulls the rotatable component to rotate back, and the other end triggers the stop contact switch.

[0027] Further, the wire feeding unit includes:

[0028] A wire pressing component for pressing the riveting wire during wire feeding. The wire pressing component includes a wire pressing cylinder for providing power for wire pressing, a wire pressing moving block installed on the wire pressing cylinder and movable with the telescoping of the cylinder. One end of the wire pressing moving block is provided with a through opening half groove for the riveting wire to pass through. A wire pressing static block is fixedly installed on the opposite side of the wire pressing moving block. One end of the wire pressing static block adjacent to the wire pressing moving block is provided with a through opening half groove for the riveting wire to pass through. When the opening half groove of the wire pressing moving block and the opening half groove of the wire pressing static block are aligned, the riveting wire can pass through.

[0029] A wire pushing component for pressing the riveting wire to keep a certain tension between the riveting wire and the wire pressing component and the wire unit, and for pushing the riveting wire forward. The wire pushing component includes a wire pushing cylinder for providing power for wire pushing, a connecting piece for connecting the wire pushing cylinder and the wire pushing block and conducting the thrust of the wire pushing cylinder to the wire pushing block. The wire pushing block is fixedly connected to the wire pressing static block. One side of the wire pushing block is provided with a through opening half groove for the riveting wire to pass through, which is in continuation with the opening half groove on the wire pressing static block.

[0030] Further, the cutting unit includes:

[0031] A cutting and pressing component for pressing the riveting wire during cutting;

[0032] A cutting tool component for cutting the riveting wire into rivets of a specific length. The cutting tool component includes a cutting tool and a cutting tool guide. The cutting tool is provided with a through hole for the riveting wire to pass through, for cutting the riveting wire passing through the through hole. One side of the cutting tool guide is provided with a through groove for the cutting tool to pass through. One side of the cutting tool guide perpendicular to the through groove is provided with a long groove leading to the through groove. The long groove is used for the riveting wire to pass through the cutting tool guide and penetrate into the through hole on the cutting tool. The cutting tool guide is provided with a through hole below the long groove for the cut rivets to pass through.

[0033] A cutting power component connected to the cutting tool component for providing power and limitation for the precise cutting of the riveting wire. The cutting power component includes a cutting cylinder for providing power for cutting, and a cutting limit for limiting the moving length of the cutting tool in the cutting tool guide, that is, limiting the moving length of the cutting tool to the position where its through hole is aligned with the through hole on the cutting tool guide.

[0034] Further, the ejector unit includes:

[0035] An ejector pin for pushing the rivet in the cutter through hole out of the through hole on the other side of the cutter guide through the through hole on one side of the cutter guide to the hole position of the workpiece to be riveted;

[0036] An ejector pin cylinder for providing power for the ejector pin to push the rivet;

[0037] A connecting piece for connecting the ejector pin and the ejector pin cylinder;

[0038] A detection component for detecting the actual ejection distance (A) of the ejector pin to ensure that the rivet is completely ejected. The detection component includes a slider installed at one end of the ejector pin cylinder for maintaining the same ejection distance as the cylinder, and a detection pen for detecting the ejection distance (C) after the slider contacts the detection pen. The actual ejection distance (A) is equal to the sum of the travel distance (B) before the slider contacts the detection pen and the ejection distance (C) after the slider contacts the detection pen.

[0039] The beneficial effects of the present invention are as follows: Before work, a whole coil of riveting wire is placed in the riveting wire unit and clamped by the adjustable riveting wire clamping rod assembly. The open end of the riveting wire passes through the adjustable riveting wire guiding rod assembly and the wire feeding control assembly and then is introduced into the device. During work, the wire feeding unit presses and straightens the riveting wire and then advances the riveting wire towards the cutting unit. During the pushing process, the traction force of the riveting wire pulls the wire feeding control assembly, and the proximity switch is activated. The motor rotates to feed the wire until the stop contact switch is triggered and then stops feeding the wire under the action of the friction disc. At the same time, the cutting unit cuts the riveting wire into rivets of a certain length. After that, the ejector unit ejects the rivets, and at the same time, detects whether the length of the rivets meets the error range and rejects the rivets that do not meet the length requirements. The whole process is automated, improving the efficiency. The diameters of the riveting wires on multiple riveting wire units can be the same or different. At the same time, cutting the rivets as needed can adapt to workpieces with various rivet requirements, and detecting the length of the cut rivets also ensures the riveting quality.

[0040] An automatic riveting device for silicon steel sheet cores, characterized by comprising:

[0041] Any one of the automatic cutting rivet devices for silicon steel sheet cores as described above;

[0042] A workpiece transmission unit for transmitting the workpiece to be riveted;

[0043] A detection unit for detecting the riveting thickness of the workpiece to be riveted before entering the rivet piercing process;

[0044] A clamping unit for clamping the workpiece during the rivet piercing process to ensure that the rivet passes through the rivet hole on the workpiece;

[0045] A riveting unit for extruding rivets on a workpiece to complete the riveting of the workpiece.

[0046] Furthermore, the automatic riveting equipment for silicon steel sheet cores further includes a waste rejection unit for rejecting workpieces that do not meet the riveting thickness requirements.

[0047] A riveting method for silicon steel sheet cores, characterized by comprising:

[0048] Step S1: Set the thickness of the workpiece to be riveted, the length of the rivet, and the dimensional error range.

[0049] Step S2: Place the rivet wire reel into the cutting system and gradually release it. After pressing and straightening the released rivet wire, cut it into rivets of a set length.

[0050] Step S3: Check whether the cut rivets meet the error requirements of the set length, and reject the rivets that do not meet the error requirements.

[0051] Step S4: Detect whether the thickness of the workpiece to be riveted meets the error range of the thickness requirement, and reject the workpieces that do not meet the error range.

[0052] Step S5: Push the rivets that meet the length requirements into the rivet holes of the workpieces to be riveted that meet the thickness requirements, and press the rivets to complete the riveting of the workpieces.

[0053] The beneficial effects of the present invention are as follows: During operation, the workpiece transmission unit conveys the workpiece to be riveted to the detection station of the detection unit. First, it detects whether the thickness of the workpiece to be riveted meets the dimensional requirements. Workpieces that do not meet the thickness dimensional requirements are rejected through the waste rejection unit. At the same time, the workpieces that meet the thickness requirements are conveyed to the clamping unit for clamping. Then, the rivet device pushes the cut rivets into the rivet holes on the workpieces. After that, the workpieces are conveyed to the riveting unit to complete the riveting. Detecting the sizes of the rivets and workpieces first and then performing riveting ensures the quality of riveting, improves the qualification rate of riveted products. In addition, the entire riveting process is fully automated, which improves the riveting efficiency. Description of the Drawings

[0054] Figure 1 It is a schematic structural diagram of an automatic cutting rivet device for silicon steel sheet cores of the present invention;

[0055] Figure 2 It is a schematic structural diagram of the rivet wire unit of an automatic cutting rivet device for silicon steel sheet cores of the present invention;

[0056] Figure 3 It is another schematic structural diagram of an automatic cutting rivet device for silicon steel sheet cores of the present invention;

[0057] Figure 4Schematic diagram of the cutting tool structure of an automatic rivet cutting device for silicon steel sheet cores according to the present invention;

[0058] Figure 5 Schematic diagram of the cutting tool guide structure of an automatic rivet cutting device for silicon steel sheet cores according to the present invention;

[0059] Figure 6 Schematic diagram of the setscrew unit structure of an automatic rivet cutting device for silicon steel sheet cores according to the present invention;

[0060] Figure 7 Schematic diagram of the movement of the setscrew unit of an automatic rivet cutting device for silicon steel sheet cores according to the present invention;

[0061] Figure 8 Schematic diagram of the structure of an automatic riveting device for silicon steel sheet cores according to the present invention;

[0062] Figure 9 Schematic flow chart of a riveting method for silicon steel sheet cores according to the present invention.

[0063] Explanation of reference numerals: 10 - Automatic rivet cutting device, 11 - Riveting wire unit, 111 - Riveting wire base, 112 - Adjustable riveting wire clamping rod assembly, 113 - Adjustable riveting wire guiding rod assembly, 114 - Wire feeding power assembly, 1141 - Motor, 1142 - Friction disc, 1143 - Compression spring assembly, 115 - Wire feeding control assembly, 1151 - Bracket, 1152 - Rotatable assembly, 1153 - Incoming wire contact switch, 1154 - Stop contact switch, 1155 - Elastic wire guiding rod, 12 - Wire feeding unit, 121 - Wire pressing assembly, 1211 - Wire pressing cylinder, 1212 - Wire pressing moving block, 1213 - Wire pressing static block, 122 - Wire pushing assembly, 1221 - Wire pushing cylinder, 1222 - Connecting piece, 1223 - Wire pushing block, 13 - Cutting unit, 131 - Cutting and pressing assembly, 132 - Cutting tool assembly, 1321 - Cutting tool, 1322 - Cutting tool guide, 133 - Cutting tool power assembly, 1331 - Cutting cylinder, 1332 - Cutting limit, 14 - Setscrew unit, 141 - Thimble, 142 - Thimble cylinder, 143 - Connecting piece, 144 - Detection assembly, 1441 - Slide block, 1442 - Detection pen, 20 - Workpiece transmission unit, 30 - Detection unit, 40 - Clamping unit, 50 - Riveting unit, 60 - Scrap removing unit. Detailed implementation manners

[0064] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0065] The structures, proportions, sizes, etc. shown in the drawings of this specification are only used to match the content disclosed in the specification for those skilled in this technology to understand and read, and are not used to limit the implementation conditions of the present invention. Therefore, they do not have substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size, without affecting the effects that the present invention can produce and the purposes that can be achieved, should still fall within the scope covered by the technical content disclosed in the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "front", "back", "middle", and "one" cited in this specification are only for the convenience of clear narration and are not used to limit the scope of implementation of the present invention. The change or adjustment of their relative relationship, without substantial change in the technical content, should also be regarded as the scope of implementation of the present invention.

[0066] As Figures 1-5 shown.

[0067] An automatic cutting and riveting device for silicon steel sheet cores, characterized in that it includes: at least one rivet wire unit 11 for placing and releasing a whole coil of rivet wire.

[0068] As Figure 2 shown, the rivet wire unit 11 includes:

[0069] A rivet wire base 111 for providing an installation base for the rivet wire unit 11.

[0070] An adjustable rivet wire clamping rod assembly 112 installed at the upper end of the rivet wire base 111 for clamping whole coils of rivet wire of different sizes.

[0071] It should be noted that the adjustable rivet wire clamping rod assembly 112 can rotate with the rivet wire coil. Usually, the thickness of the rivet wire coil does not exceed the height of the adjustable rivet wire clamping rod assembly 112. In practice, there are usually two or more adjustable rivet wire clamping rod assemblies 112. For example, in a specific implementation, there are 4 adjustable rivet wire clamping rod assemblies 112.

[0072] An adjustable rivet wire guiding rod assembly 113 installed at the upper end of the rivet wire base 111 for guiding a single rivet wire after the release of the rivet wire coil.

[0073] It should be noted that the adjustable rivet wire guiding rod assembly 113 is fixed and has a ring shape or a hole shape for guiding the rivet wire to pass through. In practice, there are usually two or more adjustable rivet wire guiding rod assemblies 113. For example, in a specific embodiment, there are 4 adjustable rivet wire guiding rod assemblies 113.

[0074] The wire feeding power component 114 is installed at the lower end of the riveting wire base 111. One end of it passes through the riveting wire base 111 and is movably connected to the adjustable riveting wire clamping rod component 112, and is used to provide power for the release of the riveting wire disc. The wire feeding power component includes a motor 1141 installed at the lower end of the riveting wire base 111. The shaft end of the motor passes through the riveting wire base 111 and is used to provide power for the release of the riveting wire disc. A friction disc 1142 is fixed on the shaft of the motor 1141 and is used to counteract the inertia force after the motor 1141 stops rotating, so as to avoid excessive release of the riveting wire disc. A compression spring component 1143 is fixed on the shaft of the motor 1141 and is used to press the friction disc.

[0075] The wire feeding control component 115 is installed at the upper end of the riveting wire base 111 and is used to control the operation or stop of the wire feeding power component 114. The wire feeding control component 115 includes: a bracket 1151 installed at the upper end of the riveting wire base 111; a rotatable component 1152 installed on the bracket 1151, which can rotate when stressed; a wire feeding contact switch 1153 installed on the bracket 1151, on one side of the rotatable component 1152. When it is triggered, the wire feeding power component 114 starts to work; a stop contact switch 1154 installed on the bracket 1151, on the other side of the rotatable component 1152 opposite to the wire feeding contact switch 1153. When it is triggered, the wire feeding power component 114 stops working; an elastic guide wire rod 1155, one end of which passes through the rotatable component 1152 and is fixed on the rotatable component 1152, and the other end can be in movable contact with the riveting wire. When the tension at the contact end with the riveting wire exceeds its elastic range, it pulls the rotatable component 1152 to rotate, and the other end triggers the wire feeding contact switch 1153. When the tension at the contact end with the riveting wire returns to its elastic range, it pulls the rotatable component 1152 to rotate back, and the other end triggers the stop contact switch 1154.

[0076] Before working, place the whole coil of riveting wire on the riveting wire unit 11, fix the riveting wire disc through the adjustable riveting wire clamping rod component 112. Then, release the riveting wire disc so that the riveting wire passes through the adjustable riveting wire guiding rod component 113 and the elastic guide wire rod 1155 in sequence and enters the cutting process. When the riveting wire is pushed forward, the riveting wire pulls the elastic guide wire rod 1155 to deform and bend. When the bending of the guide wire rod 1155 exceeds its bearable range, the guide wire rod 1155 drives the rotatable component 1152 to rotate and trigger the wire feeding contact switch 1153, then the motor 1141 rotates to release the riveting wire, so that the tension received by the guide wire rod 1155 decreases and rotates back to trigger the stop contact switch 1154, then the motor 1141 stops rotating and stops immediately under the action of the friction disc 1142, avoiding the situation that the inertia force causes excessive release of the riveting wire.

[0077] It should be noted that in a specific implementation, a plurality of rivet wire units 11 may be provided according to riveting requirements, the rivet wire coil diameters on each rivet wire unit 11 may be the same or different, and the diameters of the rivet wires on each rivet wire unit 11 may also be the same or different. For example, in a specific embodiment, if the silicon steel sheet core has three rivet holes that need to be riveted, three groups of riveting units 11 are provided accordingly.

[0078] like Figure 3 shown.

[0079] The wire feeding unit 12 is used for pressing and straightening the rivet wire after release, and for pushing the rivet wire forward to ensure the continuity of the rivet wire at the cutting position; the wire feeding unit 12 comprises: a wire pressing assembly 121, used for pressing the rivet wire when feeding the wire, the wire pressing assembly 121 comprises a wire pressing cylinder 1211, used for providing power for wire pressing, a wire pressing movable block 1212, mounted on the wire pressing cylinder, which can move with the extension and contraction of the cylinder, and one end of which is provided with a through opening half groove for the rivet wire to pass through, a wire pressing static block 1213, fixedly mounted on the opposite side of the wire pressing movable block 1212, and one end of which is adjacent to the wire pressing movable block 1212 is provided with a through opening half groove for the rivet wire to pass through, and the open half groove of the wire pressing movable block 1212 and the open half groove of the wire pressing static block 1213 can allow the rivet wire to pass through when they are aligned;

[0080] The wire pushing assembly 122 is used to press the rivet wire so that the rivet wire maintains a certain tension between the wire pressing assembly 121 and the rivet wire unit 11, and pushes the rivet wire forward. The wire pushing assembly 122 includes a wire pushing cylinder 1221 for providing power for wire pushing, a connecting piece 1222 for connecting the wire pushing cylinder 1221 and the wire pushing block 1223, and transmitting the thrust of the wire pushing cylinder 1221 to the wire pushing block 1223. The wire pushing block 1223 is fixedly connected to the wire pressing static block 1213, and one side of the wire pushing block is provided with a through opening half-groove that is extended in the same manner as the opening half-groove on the wire pressing static block 1213 for the rivet wire to pass through.

[0081] During operation, the wire pressing cylinder 1211 drives the wire pressing movable block 1212 downward to cooperate with the wire pressing static block 1213 to press the rivet wire, and the wire pushing cylinder 1221 moves, and the thrust is transmitted to the wire pushing block 1223 through the connecting piece 1222. The wire pushing block 1223 pushes the rivet wire through the groove between the wire pressing movable block 1212 and the wire pressing static block 1213 and moves forward.

[0082] It should be noted that, in a specific embodiment, the wire pushing block 1223 and the wire pressing static block 1213 are an integral part.

[0083] The cutting unit 13 is used to cut the riveting wire into rivets of a specific size. The cutting unit 13 includes: a cutting pressing assembly 131 for pressing the riveting wire during cutting; a cutting tool assembly 132 for cutting the riveting wire into rivets of a specific length. The cutting tool assembly 132 includes a cutting tool 1321 and a cutting tool guide 1322. As Figure 4 shown, a through hole 1321a through which the riveting wire can pass is formed in the cutting tool 1321 for cutting the riveting wire passing through the through hole 1321a. As Figure 5 shown, a through slot 1322a is formed on one side of the cutting tool guide 1322 for the cutting tool 1321 to pass through. A long slot 1322b penetrating to the through slot 1322a is formed on the side of the cutting tool guide 1322 perpendicular to the through slot 1322a. The long slot 1322b is used for the riveting wire to pass through the cutting tool guide 1322 and penetrate into the through hole 1321a on the cutting tool 1321. A through hole 1322c is formed below the long slot 1322b of the cutting tool guide 1322 for the cut rivets to pass through. A cutting power assembly 133 is connected to the cutting tool assembly 132 for providing power and limitation for the precise cutting of the riveting wire. The cutting power assembly 133 includes a cutting cylinder 1331 for providing power for cutting, and a cutting limit 1332 for limiting the moving length of the cutting tool in the cutting tool guide 1322, that is, limiting the moving length of the cutting tool to the position where its through hole is aligned with the through hole on the cutting tool guide.

[0084] During operation, the cutting tool 1321 is in the first position. When the wire feeding unit 12 passes the riveting wire through the long slot 1322b on the cutting tool guide 1322 and into the through hole 1321a on the cutting tool 1321, the cutting pressing assembly 131 presses the riveting wire. The cutting cylinder 1331 pushes the cutting tool 1321 downward through a lever to cut the riveting wire. The cut rivets stay in the through hole 1321a. Under the action of the cutting limit 1332, the cutting tool 1321 stays at the position where the through hole 1321a is aligned with the through hole 1322 on the cutting tool guide 1322 after cutting the riveting wire, so as to facilitate ejection. After cutting is completed, the cutting pressing assembly 131 is released, and the wire feeding unit 12 continues to feed wire for cutting.

[0085] As Figure 6 shown.

[0086] The set screw unit 14 is used to drive the rivet into the rivet hole of the workpiece to be riveted. The set screw unit 14 includes: a ejector pin 141, which is used to pass through the through hole 1322c on one side of the cutter guide 1322 to eject the rivet in the cutter through hole 1321a from the through hole 1322c on the other side of the cutter guide 1322 to the hole position of the workpiece to be riveted; a ejector pin cylinder 142, which is used to provide power for the ejector pin 141 to push the rivet; a connecting member 143, which is used to connect the ejector pin 141 and the ejector pin cylinder 142; a detection assembly 144, which is used to detect the actual ejection distance (A) of the ejector pin 141 to ensure that the rivet is completely ejected, including a slider 1441, which is installed at one end of the ejector pin cylinder 142 and is used to maintain the same ejection distance as the ejector pin cylinder 142, and a detection pen 1442, which is used to detect the ejection distance (C) after the slider contacts the detection pen. As Figure 6 shown, the actual ejection distance (A) is equal to the sum of the travel distance (B) before the slider contacts the detection pen and the ejection distance (C) after the slider contacts the detection pen.

[0087] As Figure 7 shown.

[0088] An automatic riveting device for silicon steel sheet cores, characterized by comprising:

[0089] Any one of the automatic cutting and riveting devices 10 for silicon steel sheet cores as described above, which is used to cut the riveting wire into rivets with a specific length according to the riveting requirements for the riveting of workpieces;

[0090] A workpiece transfer unit 20, which is used to transfer the workpieces to be riveted;

[0091] A detection unit 30, which is used to detect the riveting thickness of the workpieces to be riveted before entering the rivet-passing process;

[0092] A clamping unit 40, which is used to clamp the workpiece during the rivet-passing process to ensure that the rivet passes through the rivet hole on the workpiece;

[0093] A riveting unit 50, which is used to extrude the rivets on the workpiece to complete the riveting of the workpiece;

[0094] A waste removal unit 60, which is used to remove the workpieces that do not meet the riveting thickness requirements.

[0095] During operation, the workpiece transfer unit 20 first conveys the workpiece to be riveted to the working station of the detection unit 30 for detecting the thickness of the workpiece to be riveted, and determines whether the workpiece meets the requirements according to the thickness. For workpieces with variable thickness (such as the iron core standard being 15 layers, and it may be detected as 14 layers or 16 layers), they are removed by the rejection unit 60. For workpieces that meet the requirements, they are conveyed to the working station of the clamping unit 40 for clamping. After clamping, the jacking unit in the rivet device 10 jacks the cut rivets into the rivet holes of the workpiece. Then, the workpiece is conveyed to the working station of the riveting unit 50, and the riveting unit 50 presses the rivets on the workpiece to complete the riveting of the workpiece. After that, the riveted workpiece is conveyed to the next working station.

[0096] As Figure 8 shown.

[0097] A riveting method for a silicon steel sheet iron core, characterized by comprising:

[0098] Step S1: Set the thickness of the workpiece to be riveted, the length of the rivet, and the dimensional error range;

[0099] Step S2: Place the rivet wire reel into the cutting system and gradually release it. After pressing and straightening the released rivet wire, cut it into rivets of a set length;

[0100] Step S3: Check whether the cut rivets meet the error requirements of the set length, and remove the rivets that do not meet the error requirements;

[0101] Step S4: Detect whether the thickness of the workpiece to be riveted meets the error range of the thickness requirement, and remove the workpieces that do not meet the error range;

[0102] Step S5: Jack the rivets that meet the length requirement into the rivet holes of the workpiece to be riveted that meets the thickness requirement, and press the rivets to complete the riveting of the workpiece.

[0103] The above embodiments are only illustrative of the principles and effects of the present invention, and are not used to limit the present invention. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical ideas disclosed by the present invention should still be covered by the claims of the present invention.

Claims

1. An automatic cutting and riveting device for silicon steel sheet cores, characterized in that include: At least one rivet wire unit is used for placing and releasing a whole coil of rivet wires; it includes: a rivet wire base, which is used to provide an installation foundation for the rivet wire unit; an adjustable rivet wire clamping rod assembly, which is installed at the upper end of the rivet wire base and is used to clamp a whole coil of rivet wires of different sizes; an adjustable rivet wire guiding rod assembly, which is installed at the upper end of the rivet wire base and is used to guide a single rivet wire after the rivet wire coil is released; a wire output power assembly, which is installed at the lower end of the rivet wire base, one end of which passes through the rivet wire base and is movably connected to the adjustable rivet wire clamping rod assembly, and is used to provide power for the release of the rivet wire coil; a wire output control assembly, which is installed at the upper end of the rivet wire base and is used to control the operation or stop of the wire output power assembly; The wire feeding unit is used for pressing and straightening the rivet wire after release, and for pushing the rivet wire forward to ensure the continuity of the rivet wire at the cutting position; it includes: a wire pressing assembly, which is used to press the rivet wire when feeding the wire; the wire pressing assembly includes a wire pressing cylinder, which is used to provide power for wire pressing; a wire pressing movable block, which is installed on the wire pressing cylinder and can move with the extension and contraction of the cylinder, and one end of which is provided with a through opening half groove for the rivet wire to pass through; a wire pressing static block, which is fixedly installed on the opposite side of the wire pressing movable block, and one end of which is adjacent to the wire pressing movable block is provided with a through opening half groove for the rivet wire to pass through, and the open half groove of the wire pressing movable block When the opening half groove of the wire pressing static block is aligned, the rivet wire can pass through; the wire feeding unit also includes: a wire pushing assembly, which is used to press the rivet wire so that the rivet wire maintains a certain tension between the wire pressing assembly and the wire pressing unit, and pushes the rivet wire forward; the wire pushing assembly includes a wire pushing cylinder, which is used to provide power for wire pushing; a connecting piece, which is used to connect the wire pushing cylinder and the wire pushing block, and transmit the thrust of the wire pushing cylinder to the wire pushing block; the wire pushing block is fixedly connected to the wire pressing static block, and one side of the wire pushing block is provided with a through opening half groove extending in the same manner as the opening half groove on the wire pressing static block for the rivet wire to pass through; The cutting unit is used to cut the rivet wire into rivets of a specific size; it includes: a cutting and pressing assembly, which is used to press the rivet wire during cutting; a cutting knife assembly, which is used to cut the rivet wire into rivets of a specific length; the cutting knife assembly includes a cutting knife and a cutting knife guide, the cutting knife is provided with a through hole for the rivet wire to pass through, and is used to cut the rivet wire passing through the through hole; one side of the cutting knife guide is provided with a through slot for the cutting knife to pass through, and one side of the cutting knife guide perpendicular to the through slot is provided with a long slot that passes through the through slot, and the long slot is used to allow the rivet wire to pass through the cutting knife. The knife guide is inserted into the through hole on the cutter, and the cutter guide is provided with a through hole below the long slot for the rivet to pass through after cutting; the cutting unit also includes: a cutting power assembly connected to the cutter assembly, used to provide power and limit for the precise cutting of the rivet wire; the cutting power assembly includes a cutting cylinder, used to provide power for cutting; a cutting limiter, used to limit the moving length of the cutter in the cutter guide, that is, to limit the moving length of the cutter to the position where its through hole is aligned with the through hole on the cutter guide; A jackscrew unit for pushing a rivet into a rivet hole of a workpiece to be riveted, comprising: a thimble for pushing the rivet in the thimble through hole out of the through hole on the other side of the cutter guide through the through hole on one side of the cutter guide to the hole position of the workpiece to be riveted; a thimble cylinder for providing power for the thimble to push the rivet; a connecting piece for connecting the thimble and the thimble cylinder; a detection component for detecting the actual ejection distance (A) of the thimble to ensure that the rivet is completely ejected. The detection component includes a slider installed at one end of the thimble cylinder for maintaining the same ejection distance as the cylinder; a detection pen for detecting the ejection distance (C) after the slider contacts the detection pen. The actual ejection distance (A) is equal to the sum of the travel distance (B) before the slider contacts the detection pen and the ejection distance (C) after the slider contacts the detection pen.

2. The automatic cutting rivet device for silicon steel sheet iron cores according to claim 1, characterized in that, The wire feeding power assembly includes: a motor installed at the lower end of the rivet wire base, and its shaft end passes through the rivet wire base for providing power for the release of the rivet wire reel; a friction disc fixed on the motor shaft for counteracting the inertia force after the motor stops rotating to avoid excessive release of the rivet wire reel; a compression spring assembly fixed on the motor shaft for pressing the friction disc.

3. The automatic cutting rivet device for silicon steel sheet cores according to claim 1 or 2, characterized in that, The wire feeding control assembly includes: a bracket installed at the upper end of the rivet wire base; a rotatable assembly installed on the bracket and rotatable when stressed; a wire feeding contact switch installed on the bracket, on one side of the rotatable assembly, and when triggered, the wire feeding power assembly starts to work; a stop contact switch installed on the bracket, on the other side of the rotatable assembly opposite to the wire feeding contact switch, and when triggered, the wire feeding power assembly stops working; an elastic guide screw rod, one end of which passes through the rotatable assembly and is fixed on the rotatable assembly, and the other end can be in movable contact with the rivet wire. When the tension at the contact end with the rivet wire exceeds its elastic range, it pulls the rotatable assembly to rotate, and the other end triggers the wire feeding contact switch. When the tension at the contact end with the rivet wire returns to its elastic range, it pulls the rotatable assembly to rotate back, and the other end triggers the stop contact switch.

4. An automatic riveting device for a silicon steel sheet iron core, characterized in that, Comprising: The automatic cutting and riveting device for silicon steel sheet cores according to any one of claims 1 to 3; a workpiece transfer unit for transferring the workpiece to be riveted; a detection unit for detecting the riveting thickness of the workpiece to be riveted before entering the rivet insertion process; a clamping unit for clamping the workpiece during the rivet insertion process to ensure that the rivet passes through the rivet hole on the workpiece; a riveting unit for extruding the rivet on the workpiece to complete the riveting of the workpiece.

5. The automatic riveting device for silicon steel sheet cores according to claim 4, characterized in that, It further includes a waste rejection unit for rejecting the workpieces that do not meet the riveting thickness requirements.

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