Friction welding method for electrode steel bar

Abstract

The invention discloses an electrode steel bar friction welding method which comprises the following steps that an electrode steel bar is conveyed to a welding station through a feeding device, one end of the electrode steel bar makes contact with a to-be-connected piece, and the other end of the electrode steel bar is clamped through a friction welding device; the friction welding device drives the electrode steel bar to rotate, after rotating friction is finished, the electrode steel bar stops rotating, and the electrode steel bar stays at the welding station and applies extrusion force to the electrode steel bar and the to-be-connected piece, so that the electrode steel bar and the to-be-connected piece extrude each other; and after primary welding, the to-be-connected piece and the electrode steel bar leave the welding station through a moving device and enter a reinforcing station, the electrode steel bar and the to-be-connected piece are subjected to secondary extrusion reinforcing on the reinforcing station, meanwhile, friction connection of the next electrode steel bar is conducted, and a friction welding finished product is obtained. According to the method, a two-time extruding and attaching mode is adopted, the contact time of the two parts after rotating friction is prolonged, generation of holes in the contact face is reduced, and the connection strength of the two parts is improved.

Description

Technical Field

[0001] The invention relates to the technical field of welding, in particular to a friction welding method for an electrode steel rod. Background Art

[0002] Friction welding is a method that uses the heat generated by the relative friction between the contact surfaces of the welded parts to make the parts near the contact surfaces of the welded parts enter a thermoplastic state, and then pressurizes and forges the welded parts to complete the welding. One typical welding method is to rotate a cylindrical workpiece so that it rubs against the surface of the relative welded parts to complete the welding. In this welding method, the contact surface of the welded parts is a plane, and the linear speed of the parts on the contact surface of the rotating welded parts that are far away from the rotating axis is large, while the linear speed of the parts close to the rotating axis is small, which leads to uneven heat between the periphery and the inside of the contact surface, which may cause the internal welding of the contact surface to be weak or no welding. After long-term use of the finished product, especially in a complex working environment, this inconsistent welding firmness of the inside and outside will increase the risk of the welded parts falling off. Summary of the invention

[0003] In view of the problem of inconsistent welding firmness in the prior art, the present invention provides an electrode steel rod friction welding method, which can improve the welding strength between the electrode steel rod and the steel piece connected with the belt. The specific technical solution is as follows:

[0004] A friction welding method for electrode steel bars comprises the following steps:

[0005] The electrode steel rod is sent to the welding station through the feeding device, one end of which contacts the part to be connected, and the other end is clamped by the friction welding device;

[0006] The friction welding device drives the electrode steel rod to rotate. After the rotation friction ends, the electrode steel rod stops rotating. The electrode steel rod stays at the welding station and applies a squeezing force to the electrode steel rod and the part to be connected, so that the two are squeezed against each other.

[0007] After one welding, the workpiece to be connected and the electrode steel rod are moved from the welding station to the reinforcement station by a moving device, and the electrode steel rod and the workpiece to be connected are subjected to secondary extrusion reinforcement at the reinforcement station, and at the same time, the friction connection of the next electrode steel rod is carried out to obtain a friction welding product.

[0008] Preferably, the dwell extrusion time ranges from 10s to 15s; and the extrusion pressure ranges from 520t to 580t.

[0009] Preferably, the secondary extrusion time ranges from 10s to 15s.

[0010] Preferably, before the electrode steel bar is fed into the welding station, the method further comprises the following steps: cleaning the connection surface of the electrode steel bar.

[0011] Preferably, the friction welding device includes a device body, a first movable structure, a second movable structure and a rotating structure, the device body forms a movable cavity, the part to be connected moves along the length direction of the movable cavity through the first movable structure, the part to be connected moves in a direction away from or close to the rotating structure through the second movable structure, the rotating structure has a clamping cavity, the cavity wall of the clamping cavity is provided with a pneumatic clamp, the pneumatic clamp clamps the electrode steel rod, drives the electrode steel rod to rotate and friction welds it to the part to be connected.

[0012] Preferably, the loading device is used to transport the electrode steel rod to be welded to the welding station. The loading device is a jack and is arranged on the ground. The electrode steel rod enters the loading range of the loading device, and the loading range corresponds to the position of the electrode steel rod to be welded to the connected part.

[0013] Preferably, the reinforcement station is provided with a clamping plate, and the clamping plate is used to apply extrusion force to the to-be-connected member and the already connected electrode steel rod, so as to perform secondary extrusion.

[0014] Preferably, the friction welding device further comprises a material receiving structure, and the material receiving structure is used to receive the welded parts to be connected pushed by the first moving structure.

[0015] Preferably, the material receiving structure comprises a first material receiving platform, a second material receiving platform and a guide member, and the guide member is obliquely arranged between the first material receiving platform and the second material receiving platform.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] This method uses a two-time extrusion bonding method to tightly fit the rotating friction electrode steel rod and the molten surface of the connected part until it cools down, which prolongs the contact time between the two after the rotational friction, ensures uniform firmness, reduces the generation of contact surface gaps, and improves the connection strength between the two. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a process flow chart of the electrode steel rod friction welding method of the present invention;

[0019] Figure 2 It is a structural schematic diagram of a friction welding device in the electrode steel bar friction welding method of the present invention;

[0020] Figure 3 It is a structural schematic diagram of a second angle of the friction welding device in the electrode steel bar friction welding method of the present invention;

[0021] Figure 4This is a schematic diagram of the structure of the friction welding device at the third angle in the electrode steel rod friction welding method of the present invention.

[0022] Figure 5 yes Figure 4 Enlarged view of point A in the middle.

[0023] In the accompanying drawings, 1-device body, 11-movable cavity, 111-guide rail, 12-clamp, 2-first movable structure, 21-screw driving member, 22-slider, 3-second movable structure, 4-rotating structure, 41-clamping cavity, 5-part to be connected, 6-electrode steel rod, 7-loading device, 8-material receiving structure, 81-first material receiving platform, 82-second material receiving platform, 83-guide member, 9-push plate, 10-clamping structure. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] It should be understood that when used in this specification and the appended claims, the terms "include" and "comprises" indicate the presence of described features, integers, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or combinations thereof.

[0026] It should also be understood that the terms used in the present specification are only for the purpose of describing specific embodiments and are not intended to limit the present invention. As used in the present specification and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include plural forms.

[0027] It should be further understood that the term "and / or" used in the present description and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0028] To solve the above problems, Figure 1 As shown, the present invention provides an electrode steel rod friction welding method, comprising the following steps:

[0029] S1: The electrode steel rod is sent to the welding station through the feeding device, one end of the electrode steel rod contacts the part to be connected, and the other end is clamped by the friction welding device;

[0030] S2: The friction welding device drives the electrode steel rod to rotate. After the rotational friction ends, the electrode steel rod stops rotating, and the electrode steel rod stays at the welding station and applies an extrusion force to the electrode steel rod and the part to be connected, so that the two are squeezed against each other;

[0031] S3: After one welding, the workpiece to be connected and the electrode steel rod are moved from the welding station to the reinforcement station through a moving device, and the electrode steel rod and the workpiece to be connected are subjected to secondary extrusion reinforcement at the reinforcement station, and at the same time, the friction connection of the next electrode steel rod is performed to obtain a friction welding product.

[0032] In an optional embodiment, the dwell extrusion time ranges from 10s to 15s; the extrusion pressure ranges from 520t to 580t. In specific implementation, the dwell extrusion time can be 10s, 12s, 13s or 15s, etc., including but not limited to the above data range, and the extrusion pressure ranges from 520t, 530t, 560t or 580t, etc., including but not limited to the above data range; specifically, by extending the contact time between the electrode steel rod 6 and the part to be connected 5 and applying pressure, the connection surface between the electrode steel rod 6 and the part to be connected 5 is tightly connected, the generation of pores is reduced, and the conductivity between the electrode steel rod 6 and the part to be connected 5 is further improved.

[0033] In an optional embodiment, the secondary extrusion time ranges from 10s to 15s. In a specific implementation, the secondary extrusion time can be 10s, 12s, 13s or 15s, including but not limited to the above data range. Specifically, during the friction welding of the next electrode steel bar 6, the previous electrode steel bar 6 is subjected to secondary extrusion, which can effectively shorten the production time and further improve the connection strength between the previous electrode steel bar 6 and the member 5 to be connected.

[0034] In an optional embodiment, before the electrode steel bar 6 is sent into the welding station, the following step is further included: cleaning the connection surface of the electrode steel bar 6. Specifically, a polishing wheel or a grinding wheel is used to perform surface treatment on the connection surface between the electrode flat steel and the part to be connected 5, to remove oil stains and impurities, improve surface finish, improve welding strength between the electrode flat steel and the part to be connected 5, effectively ensure friction welding quality, and thus improve workpiece quality.

[0035] In an optional embodiment, after all the electrode steel bars 6 are connected and the parts to be connected 5 leave the reinforcement station, the following step is further included: testing the connection strength between the electrode steel bars 6 and the parts to be connected 5. Specifically, a tensile test, a shear test or a hardness test can be performed to test the connection strength between the electrode steel bars 6 and the parts to be connected 5.

[0036] In an optional embodiment, if Figures 2 to 4As shown, the friction welding device includes a device body 1, a first movable structure 2, a second movable structure 3 and a rotating structure 4, the device body 1 forms a movable cavity 11, the part 5 to be connected moves along the length direction of the movable cavity 11 through the first movable structure 2, the part 5 to be connected moves toward a direction away from or close to the rotating structure 4 through the second movable structure 3, the rotating structure 4 has a clamping cavity 41, the cavity wall of the clamping cavity 41 is provided with a pneumatic clamp, the pneumatic clamp clamps the electrode steel rod 6, drives the electrode steel rod 6 to rotate and friction welds it to the part 5 to be connected. Specifically, the part to be connected 5 is placed in the movable cavity 11, and the electrode steel rod 6 is transported to the welding station corresponding to the part to be connected 5 and the clamping cavity 41 through the loading device 7. The part to be connected 5 and the electrode steel rod 6 are moved toward the rotating structure 4 through the second movable structure 3, and at the same time, part of the electrode steel rod 6 is pushed into the clamping cavity 41 and clamped by the pneumatic clamp. The rotating structure 4 rotates to drive the electrode steel rod 6 to rotate and friction weld to the part to be connected 5; in order to further avoid the displacement of the part to be connected 5 during friction welding, the device body 1 is also provided with a clamping structure 10, which is a telescopic rod and is arranged on the surface of the movable cavity 11 opposite to the part to be connected 5.

[0037] Among them, Figure 5 As shown, the cavity wall of the movable cavity 11 is provided with a guide rail 111, and the first movable structure 2 includes a screw driving member 21 and a slider 22. The slider 22 moves along the length direction of the guide rail 111 through the screw driving member 21, and part of the slider 22 abuts against the part to be connected 5, pushing the part to be connected 5 to move toward the direction of the material receiving structure 8; the second movable structure 3 includes a moving platform and a telescopic driving member, the part to be connected 5 is placed on the moving platform, and the moving platform is driven by the telescopic driving member to move toward the direction of the rotating structure 4, so that the electrode steel rod 6 to be welded enters the clamping cavity 41, and when the welding is completed, the moving platform is driven by the telescopic driving member again to move in the direction away from the rotating structure 4.

[0038] In an optional embodiment, if Figure 4 As shown, the loading device 7 is used to transport the electrode steel rod 6 to be welded to the welding station. The loading device 7 is a jack and is set on the ground. The electrode steel rod 6 enters the loading range of the loading device 7, and the loading range corresponds to the position of the electrode steel rod 6 for welding the connected part 5.

[0039] After the welding of the electrode steel rod 6 is completed, the first movable structure 2 pushes the welded electrode steel rod 6 to the reinforcement station, and cooperates with the second movable structure 3 to perform secondary extrusion, so that the electrode steel rod 6 is tightly connected to the part 5 to be connected.

[0040] In an optional embodiment, if Figure 2 and Figure 3As shown, the reinforcement station is provided with a clamping plate 12, and the clamping plate 12 is used to apply extrusion force to the to-be-connected member 5 and the already connected electrode steel rod 6 for secondary extrusion. Specifically, the clamping plate 12 is provided on one side of the reinforcement station close to the rotating structure 4.

[0041] In an optional embodiment, if Figure 2 and Figure 3 As shown, the friction welding device further includes a material receiving structure 8 , and the material receiving structure 8 is used to receive the welded parts 5 pushed by the first moving structure 2 .

[0042] In an optional embodiment, if Figure 2 and Figure 3 As shown, the material receiving structure 8 includes a first material receiving platform 81, a second material receiving platform 82 and a guide member 83, and the guide member 83 is tilted between the first material receiving platform 81 and the second material receiving platform 82. Specifically, the first material receiving platform 81 and the guide member 83 are an integrally formed structure with a high connection strength. The first material receiving platform 81 and the guide member 83 are provided with a plurality of guide grooves, which are arranged in parallel, and each guide groove corresponds to the gap between the two electrode steel bars 6 of the friction welding product. Further, the second material receiving platform 82 is provided with a slide plate or a roller, and the friction welding product is moved to the position corresponding to the first material receiving platform 81 by the slide plate or the roller. An automatic push plate 9 is provided on the side of the second material receiving platform 82 away from the material receiving node. When the friction welding product passes through the second material receiving platform 82 and reaches the position corresponding to the first material receiving platform 81, the push plate 9 automatically pushes the friction welding product to move toward the direction of the material receiving structure 8, and the friction welding product falls into the first material receiving platform 81.

[0043] Example 1

[0044] The electrode steel rod 6 is sent to the welding station through the feeding device 7, one end of which contacts the workpiece 5 to be connected, and the other end is clamped by the friction welding device; the friction welding device drives the electrode steel rod 6 to rotate, and after the rotational friction is completed, the electrode steel rod 6 stops rotating, and the electrode steel rod 6 stays at the welding station and applies an extrusion force of 520t to the electrode steel rod 6 and the workpiece 5 to be connected, so that the two are squeezed against each other for 10s; after one welding, the workpiece 5 to be connected and the electrode steel rod 6 leave the welding station and enter the reinforcement station through the moving device, and the electrode steel rod 6 and the workpiece 5 to be connected are subjected to secondary extrusion reinforcement for 10s at the reinforcement station, and the friction connection of the next electrode steel rod 6 is carried out at the same time, and four electrode steel rods 6 are friction welded to the workpiece 5 to be connected in turn using the same parameters to obtain a finished product.

[0045] Example 2

[0046] The electrode steel rod 6 is sent to the welding station through the feeding device 7, one end of which contacts the workpiece 5 to be connected, and the other end is clamped by the friction welding device; the friction welding device drives the electrode steel rod 6 to rotate, and after the rotational friction is completed, the electrode steel rod 6 stops rotating, and the electrode steel rod 6 stays at the welding station and applies an extrusion force of 520t to the electrode steel rod 6 and the workpiece 5 to be connected, so that the two are squeezed against each other for 13s; after one welding, the workpiece 5 to be connected and the electrode steel rod 6 leave the welding station and enter the reinforcement station through the moving device, and the electrode steel rod 6 and the workpiece 5 to be connected are subjected to secondary extrusion reinforcement for 13s at the reinforcement station, and the friction connection of the next electrode steel rod 6 is carried out at the same time, and four electrode steel rods 6 are friction welded to the workpiece 5 to be connected in turn using the same parameters to obtain a finished product.

[0047] Example 3

[0048] The electrode steel rod 6 is sent to the welding station through the feeding device 7, one end of which contacts the workpiece 5 to be connected, and the other end is clamped by the friction welding device; the friction welding device drives the electrode steel rod 6 to rotate, and after the rotational friction is completed, the electrode steel rod 6 stops rotating, and the electrode steel rod 6 stays at the welding station and applies an extrusion force of 560t to the electrode steel rod 6 and the workpiece 5 to be connected, so that the two are squeezed against each other for 15s; after one welding, the workpiece 5 to be connected and the electrode steel rod 6 leave the welding station and enter the reinforcement station through the moving device, and the electrode steel rod 6 and the workpiece 5 to be connected are subjected to secondary extrusion reinforcement for 15s at the reinforcement station, and the friction connection of the next electrode steel rod 6 is carried out at the same time, and four electrode steel rods 6 are friction welded to the workpiece 5 to be connected in turn using the same parameters to obtain a finished product.

[0049] Example 4

[0050] The electrode steel rod 6 is sent to the welding station through the feeding device 7, one end of which contacts the workpiece 5 to be connected, and the other end is clamped by the friction welding device; the friction welding device drives the electrode steel rod 6 to rotate, and after the rotational friction is completed, the electrode steel rod 6 stops rotating, and the electrode steel rod 6 stays at the welding station and applies an extrusion force of 580t to the electrode steel rod 6 and the workpiece 5 to be connected, so that the two are squeezed against each other for 15s; after one welding, the workpiece 5 to be connected and the electrode steel rod 6 leave the welding station and enter the reinforcement station through the moving device, and the electrode steel rod 6 and the workpiece 5 to be connected are subjected to secondary extrusion reinforcement for 15s at the reinforcement station, and the friction connection of the next electrode steel rod 6 is carried out at the same time, and four electrode steel rods 6 are friction welded to the workpiece 5 to be connected in turn using the same parameters to obtain a finished product.

[0051] The above description is only a preferred feasible embodiment of the present invention and is not intended to limit the scope of the patent application of the present invention. All equivalent changes, equivalent substitutions or modified changes performed within the technical spirit and principles suggested by the present invention should be included in the scope of patent protection covered by the present invention.

Claims

1. A friction welding method for electrode steel bars, characterized in that: The following steps are involved: The electrode steel rod is sent to the welding station through the feeding device, one end of which contacts the part to be connected, and the other end is clamped by the friction welding device; The friction welding device drives the electrode steel rod to rotate. After the rotation friction ends, the electrode steel rod stops rotating. The electrode steel rod stays at the welding station and applies a squeezing force to the electrode steel rod and the part to be connected, so that the two are squeezed against each other. After one welding, the workpiece to be connected and the electrode steel rod are moved from the welding station to the reinforcement station by a moving device, and the electrode steel rod and the workpiece to be connected are subjected to secondary extrusion reinforcement at the reinforcement station, and at the same time, the friction connection of the next electrode steel rod is carried out to obtain a friction welding product.

2. The electrode steel bar friction welding method according to claim 1, characterized in that: The dwell extrusion time ranges from 10s to 15s; the extrusion pressure ranges from 520t to 580t.

3. The electrode steel bar friction welding method according to claim 1, characterized in that: The secondary extrusion time ranges from 10s to 15s.

4. The electrode steel bar friction welding method according to claim 1, characterized in that: Before the electrode steel rod is sent into the welding station, the method further comprises the following steps: cleaning the connection surface of the electrode steel rod.

5. The electrode steel bar friction welding method according to claim 1, characterized in that: The friction welding device includes a device body, a first movable structure, a second movable structure and a rotating structure. The device body forms a movable cavity. The part to be connected moves along the length direction of the movable cavity through the first movable structure. The part to be connected moves in a direction away from or close to the rotating structure through the second movable structure. The rotating structure has a clamping cavity. The cavity wall of the clamping cavity is provided with a pneumatic clamp. The pneumatic clamp clamps the electrode steel rod, drives the electrode steel rod to rotate and friction welds it to the part to be connected.

6. The electrode steel bar friction welding method according to claim 1, characterized in that: The loading device is used to transport the electrode steel rod to be welded to the welding station. The loading device is a jack and is set on the ground. The electrode steel rod enters the loading range of the loading device, and the loading range corresponds to the position of the electrode steel rod to be welded to the connected part.

7. The electrode steel bar friction welding method according to claim 6, characterized in that: The reinforcement station is provided with a clamping plate, and the clamping plate is used to apply extrusion force to the to-be-connected member and the already connected electrode steel rod, so as to perform secondary extrusion.

8. The electrode steel bar friction welding method according to claim 5, characterized in that: The friction welding device further comprises a material receiving structure, and the material receiving structure is used to receive the welded parts to be connected pushed by the first moving structure.

9. The electrode steel bar friction welding method according to claim 8, characterized in that: The material receiving structure comprises a first material receiving platform, a second material receiving platform and a guide member, wherein the guide member is obliquely arranged between the first material receiving platform and the second material receiving platform.

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