Powder metallurgy belt pulley projection welding electrode mechanism

Abstract

The utility model relates to the field of resistance projection welding, in particular to a powder metallurgy belt pulley projection welding electrode mechanism which is characterized in that a lower electrode is arranged in the middle of the upper end of a lower electrode holder, a check ring positioning sleeve and an insulation positioning sleeve are sequentially arranged on the outer side of the lower electrode to position a second workpiece to be welded, and a wheel body positioning core is in threaded connection with the middle of the lower electrode; a lower electrode insulation sleeve is connected between the wheel body positioning core and the lower electrode, and the wheel body positioning core is used for positioning a first workpiece to be welded. According to the projection welding device, workpieces to be welded can be effectively positioned through the wheel body positioning core, the insulation positioning sleeve and the check ring positioning sleeve which are arranged on the lower electrode base, the coaxiality of the workpieces can be guaranteed, and meanwhile projection welding is carried out on the workpieces in cooperation with the upper electrode base; and meanwhile, in the later maintenance process, the maintenance operation of the lower electrode can be completed only by disassembling the wheel body positioning core, positioning is accurate, quick-wear parts are easy to replace, and the machining efficiency is effectively improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to resistance projection welding technical field especially relates to a kind of powder metallurgy pulley projection welding electrode mechanism. BACKGROUND

[0002] Powder metallurgy technique has the advantages such as low cost, near net shape and is widely used in the production of pulley, however, due to the characteristics of powder metallurgy processing technology, the retainer on one side of pulley needs to be machined to wheel body in later period, and the current processing mode is mostly resistance projection welding, riveting, projection welding and riveting common form.

[0003] Among them, resistance projection welding forming does not need auxiliary material, and the processing procedure is simple, it is ideal processing mode of low production cost and high efficiency, but also limited by welding strength, coaxial degree of retainer and wheel body, electrode service life and other factors, and has not been widely promoted, therefore, a kind of powder metallurgy pulley projection welding electrode mechanism is urgently needed. SUMMARY

[0004] The utility model aims at solving the shortcomings in the prior art, and provides a kind of powder metallurgy pulley projection welding electrode mechanism.

[0005] To achieve the above object, the utility model adopts the following technical scheme:

[0006] A kind of powder metallurgy pulley projection welding electrode mechanism, including upper electrode seat, lower electrode seat, the upper end middle part of lower electrode seat is equipped with lower electrode, the outer side of lower electrode is sequentially provided with retainer positioning sleeve, insulating positioning sleeve to position welded work piece two, and the middle part of lower electrode is screwed with wheel body positioning core, and lower electrode insulation sleeve is connected between wheel body positioning core and lower electrode, and wheel body positioning core is used for positioning welded work piece one;

[0007] The bottom of upper electrode seat is equipped with upper electrode to conduct welding current, and upper electrode seat and lower electrode seat are positioned and installed by upper electrode bottom plate and lower electrode bottom plate in sequence, and are symmetrically arranged in upper and lower;

[0008] The inner part of upper electrode seat and lower electrode seat is provided with water cooling mechanism one and water cooling mechanism two respectively.

[0009] In addition, preferably, the wheel body positioning core is hollow in the middle, and is fixed by screwing in the middle part of lower electrode seat, and the inner wall of wheel body positioning core is provided with positioning core insulation sleeve to block current in lower electrode seat.

[0010] In addition, preferably, the upper part of wheel body positioning core is provided with dust cover at opening.

[0011] In addition, preferably, the water cooling mechanism one includes upper electrode water inlet, upper electrode water channel one, upper electrode water outlet, upper electrode water channel three, upper electrode water channel two.

[0012] The upper electrode water inlet and the upper electrode water outlet are symmetrically arranged on the upper part of the upper electrode seat, and are sequentially communicated by the upper electrode water channel one, the upper electrode water channel two and the upper electrode water channel three.

[0013] In addition, preferably, the water cooling mechanism two comprises a lower electrode water inlet, a lower electrode water channel one, a lower electrode water channel two, a lower electrode water channel three, a lower electrode water channel four, a lower electrode water channel five and a lower electrode water outlet.

[0014] The lower electrode water inlet and the lower electrode water outlet are sequentially arranged on the same side of the lower electrode seat, and the lower electrode water inlet is sequentially communicated by the lower electrode water channel one, the lower electrode water channel two, the lower electrode water channel three, the lower electrode water channel four, the lower electrode water channel five and the lower electrode water outlet.

[0015] The utility model discloses a beneficial effect is:

[0016] In the utility model, the wheel body positioning core, the insulating positioning sleeve and the baffle ring positioning sleeve arranged on the lower electrode seat can effectively position the workpieces to be welded, and can guarantee the coaxiality between the workpieces, and cooperate with the upper electrode to perform projection welding on the workpieces, and only need to disassemble the wheel body positioning core in the later maintenance process to complete the maintenance operation on the lower electrode, which is not only accurate in positioning but also easy to replace the vulnerable parts, and effectively improves the processing efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0017] Fig. 1 An external structure schematic view of the projection welding electrode mechanism of the powder metallurgy belt pulley is provided in the utility model;

[0018] Fig. 2 An internal structure schematic view of the projection welding electrode mechanism of the powder metallurgy belt pulley is provided in the utility model;

[0019] Fig. 3 An internal structure schematic view of the lower electrode seat is provided in the utility model.

[0020] In the drawing: 1, upper electrode bottom plate; 2, upper electrode seat; 3, upper electrode; 4, workpiece one to be welded; 5, workpiece two to be welded; 6, wheel body positioning core; 7, insulating positioning sleeve; 8, lower electrode seat; 9, lower electrode bottom plate; 10, dust cover; 11, positioning core insulating sleeve; 12, baffle ring positioning sleeve; 13, lower electrode; 14, lower electrode insulating sleeve; 15, upper electrode water inlet; 16, upper electrode water channel one; 17, lower electrode water channel two; 18, lower electrode water channel three; 19, lower electrode water channel one; 20, lower electrode water inlet; 21, upper electrode water outlet; 22, upper electrode water channel three; 23, upper electrode water channel two; 24, lower electrode water channel four; 25, lower electrode water channel five; 26, lower electrode water outlet. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments.

[0022] Referring to Figs. 1-3 A kind of powder metallurgy pulley projection welding electrode mechanism, including upper electrode seat 2, lower electrode seat 8, the upper end middle part of lower electrode seat 8 is equipped with lower electrode 13, the outer side of lower electrode 13 is sequentially provided with baffle ring positioning sleeve 12, insulating positioning sleeve 7 to position welded workpiece two 5, i.e., pulley baffle ring, and the middle part of lower electrode 13 is screwed with wheel body positioning core 6, and lower electrode insulating sleeve 14 is connected between wheel body positioning core 6 and lower electrode 13, wheel body positioning core 6 is used to position welded workpiece one 4, i.e., pulley wheel body;

[0023] Further, the bottom end of upper electrode seat 2 is equipped with upper electrode 3 to conduct welding current, and upper electrode seat 2 and lower electrode seat 8 are positioned and installed by upper electrode bottom plate 1 and lower electrode bottom plate 9 in sequence, and are arranged symmetrically in upper and lower directions.

[0024] Among them, one side of upper electrode bottom plate 1 is connected with the upper electrode conducting surface of welding machine, is connected according to the installation hole of the installation hole of the upper electrode surface of welding machine, ensures that the large current output by welding machine is conducted to upper electrode 3 through enough conducting surface, and the other side is connected with upper electrode seat 2 through bolt, which plays the role of bearing the whole upper electrode 3 mechanism and conducting.

[0025] Meanwhile, welded workpiece one 4, i.e., pulley wheel body, is positioned by upper electrode seat 2, and is also welded and formed on the upper surface, one side of lower electrode bottom plate 9 is connected with the lower electrode conducting surface of welding machine, ensures that the large current output by welding machine is conducted to lower electrode 13 through enough conducting surface, and the other side is connected with lower electrode seat 8 through bolt, which plays the role of bearing the whole lower electrode mechanism and conducting.

[0026] Further, the inner part of upper electrode seat 2 and lower electrode seat 8 is respectively provided with water cooling mechanism one and water cooling mechanism two, and the high temperature generated after the conduction of upper electrode seat 2 and lower electrode seat 8 can be effectively inhibited and reduced by water cooling mechanism one and water cooling mechanism two.

[0027] Further, wheel body positioning core 6 is hollow in the middle, and is fixed in the middle part of lower electrode seat 8 by screwing, and the inner wall of wheel body positioning core 6 is provided with positioning core insulating sleeve 11 to block the current in lower electrode seat 8.

[0028] Further, dust cover 10 is arranged at the opening of the upper part of wheel body positioning core 6.

[0029] Further, the water cooling mechanism one includes the upper electrode water inlet 15, the upper electrode water channel one 16, the upper electrode water outlet 21, the upper electrode water channel three 22, and the upper electrode water channel two 23.

[0030] Further, the upper electrode water inlet 15 and the upper electrode water outlet 21 are symmetrically arranged on the upper part of the upper electrode seat 2, and the upper electrode water inlet 15, the upper electrode water channel two 23, and the upper electrode water channel three 22 are sequentially connected between the upper electrode water inlet 15 and the upper electrode water outlet 21.

[0031] Further, the water cooling mechanism two includes the lower electrode water inlet 20, the lower electrode water channel one 19, the lower electrode water channel two 17, the lower electrode water channel three 18, the lower electrode water channel four 24, the lower electrode water channel five 25, and the lower electrode water outlet 26.

[0032] Further, the lower electrode water inlet 20 and the lower electrode water outlet 26 are sequentially arranged on the same side of the lower electrode seat 8, and the lower electrode water inlet 20 is sequentially connected to the lower electrode water outlet 26 through the lower electrode water channel one 19, the lower electrode water channel two 17, the lower electrode water channel three 18, the lower electrode water channel four 24, and the lower electrode water channel five 25.

[0033] In this embodiment, the welded workpiece one 4 and the welded workpiece two 5 are installed on the lower electrode seat 8, wherein the welded workpiece one 4, i.e., the pulley body, is positioned by the pulley positioning core 6, and the welded workpiece two 5, i.e., the pulley retainer, is positioned by the retainer positioning sleeve 12 and the insulating positioning sleeve 7, thereby ensuring the positioning accuracy and coaxiality between the workpieces. At the same time, the upper electrode seat 2 and the lower electrode seat 8 are electrified to conduct electrically conductive projection welding on the workpieces through the upper electrode 3 and the lower electrode 13. The processing process is well known to those skilled in the art, and therefore will not be described in detail.

[0034] The heat generated by the welding process is cooled by the cooling mechanism arranged in the upper electrode seat 2 and the lower electrode seat 8, specifically as follows:

[0035] The cooling water enters the upper electrode seat 2 through the upper electrode water inlet 15, and then circulates through the upper electrode water channel one 16, the upper electrode water channel two 23, and the upper electrode water channel three 22 to cool the seat body, and then is discharged through the upper electrode water outlet 21.

[0036] The cooling water enters the lower electrode seat 8 through the lower electrode water inlet 20, and then circulates through the lower electrode water channel one 19, the lower electrode water channel two 17, the lower electrode water channel three 18, the lower electrode water channel four 24, and the lower electrode water channel five 25 to cool the seat body, and then is discharged through the lower electrode water outlet 26.

[0037] Wherein, in actual use, the lower electrode 13 directly contacts the welded workpiece two 5, i.e. the pulley retainer, and the contact surface width is slightly narrower than the retainer width, but can completely cover the convex point on the retainer, so that the current density is more concentrated during welding, and the welding quality is guaranteed, and the contact surface of the lower electrode 13 and the lower electrode seat 8 is designed to be large to ensure that a large current passes through, and the lower electrode 13 is made of beryllium-cobalt-copper to ensure its service life, the lower electrode 13 is connected by the connecting bolt in the middle of the wheel body positioning core 6 and is tightly attached to the lower electrode seat 8, and it is also very convenient to replace after wear, and the dust cover 10 covers the upper part of the channel in the middle of the wheel body positioning core 6 to prevent the equipment from being unable to disassemble the bolt due to dust accumulation in the channel after long-term use.

[0038] Wherein, in actual use, the upper electrode directly contacts the welded workpiece one 4, i.e. the pulley body, and the contact surface of the pulley body is machined to be consistent with the width of the retainer ring, so that the current density is more concentrated during welding, and the welding quality is guaranteed, and in addition, the upper electrode 3 is made of beryllium-cobalt-copper to ensure its service life, and the upper electrode 3 is directly connected with the upper electrode seat 2 through a bolt, and it is also very convenient to replace after wear.

[0039] Wherein, in actual use, the wheel body positioning core 6 is used for positioning the welded workpiece one 4, i.e. the pulley body, which is different from the positioning core made of traditional rubber insulation material, and the wheel body positioning core 6 in this mechanism is made of non-magnetic stainless steel material, which has higher machining precision and can ensure positioning accuracy, and is more wear-resistant and has longer service life, thereby avoiding inaccurate positioning caused by wear during frequent disassembly and assembly of the pulley body, and the use of non-magnetic stainless steel also avoids magnetic loss of current during high-current welding.

[0040] Wherein, in actual use, the retainer positioning sleeve 12 is used for positioning the welded workpiece two 5, i.e. the pulley retainer, which is made of non-magnetic stainless steel material, has higher machining precision and can ensure positioning accuracy, and is more wear-resistant and has longer service life, thereby avoiding inaccurate positioning caused by wear during frequent disassembly and assembly of the retainer.

[0041] In the utility model, the wheel body positioning core 6, the insulation positioning sleeve 7 and the retainer positioning sleeve 12 arranged on the lower electrode seat 8 can effectively position the workpiece to be welded and can guarantee the coaxiality between the workpieces, and cooperate with the upper electrode 3 to perform projection welding on the workpiece, and only the wheel body positioning core 6 needs to be disassembled during the later maintenance process, so that the maintenance operation of the lower electrode 13 can be completed, the positioning is accurate and the easy-to-wear parts are easy to replace, and the machining efficiency is effectively improved.

[0042] The above merely describes a preferred embodiment of the present application, and the protection scope of the present application is not limited thereto, and any skilled person in the art, according to the technical scheme and the inventive concept of the present application, makes equivalent replacement or change within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A powder metallurgy pulley projection welding electrode mechanism comprising an upper electrode holder (2), a lower electrode holder (8), characterized in that, The upper end of the lower electrode seat (8) is provided with a lower electrode (13), the outer side of the lower electrode (13) is sequentially provided with a check ring positioning sleeve (12) and an insulating positioning sleeve (7) to position the welded workpiece two (5), and the middle part of the lower electrode (13) is screwed with a wheel body positioning core (6), the wheel body positioning core (6) is connected with the lower electrode (13) through a lower electrode insulating sleeve (14), and the wheel body positioning core (6) is used for positioning the welded workpiece one (4); The bottom end of the upper electrode seat (2) is provided with an upper electrode (3) to conduct welding current, the upper electrode seat (2) and the lower electrode seat (8) are sequentially positioned and installed by an upper electrode bottom plate (1) and a lower electrode bottom plate (9), and are symmetrically arranged in an up-down direction; The inner parts of the upper electrode seat (2) and the lower electrode seat (8) are respectively provided with a water cooling mechanism one and a water cooling mechanism two.

2. A powder metallurgy pulley projection welding electrode mechanism according to claim 1, wherein The wheel body positioning core (6) is hollow in the middle and is screwed and fixed in the middle part of the lower electrode seat (8), and the inner wall of the wheel body positioning core (6) is provided with a positioning core insulating sleeve (11) to block the current in the lower electrode seat (8).

3. A powder metallurgy pulley projection welding electrode mechanism according to claim 2, wherein The upper part of the wheel body positioning core (6) is provided with a dust cover (10).

4. A powder metallurgy pulley projection welding electrode mechanism according to claim 1, wherein The water cooling mechanism one comprises an upper electrode water inlet (15), an upper electrode water channel one (16), an upper electrode water outlet (21), an upper electrode water channel three (22) and an upper electrode water channel two (23); The upper electrode water inlet (15) and the upper electrode water outlet (21) are symmetrically arranged and installed on the upper part of the outer side of the upper electrode seat (2), and the upper electrode water inlet (15), the upper electrode water outlet (21), the upper electrode water channel one (16), the upper electrode water channel two (23) and the upper electrode water channel three (22) are sequentially communicated.

5. A powder metallurgy pulley projection welding electrode mechanism according to claim 1, wherein The water cooling mechanism two comprises a lower electrode water inlet (20), a lower electrode water channel one (19), a lower electrode water channel two (17), a lower electrode water channel three (18), a lower electrode water channel four (24), a lower electrode water channel five (25) and a lower electrode water outlet (26); The lower electrode water inlet (20) and the lower electrode water outlet (26) are sequentially installed on the same side of the outer part of the lower electrode seat (8), and the lower electrode water inlet (20) is sequentially communicated with the lower electrode water outlet (26) through the lower electrode water channel one (19), the lower electrode water channel two (17), the lower electrode water channel three (18), the lower electrode water channel four (24) and the lower electrode water channel five (25).

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