CN102632329A - Welding method and welding equipment of double-rope groove pulley - Google Patents

Abstract

The embodiment of the invention discloses a welding method and welding equipment for a double rope groove pulley, belonging to the technical field of mechanical manufacturing. The method includes: placing at least one double-groove pulley to be welded on the roller frame and keeping the axis of the double-groove pulley horizontal; preheating the part to be welded of the double-groove pulley to 100°C 150°C; perform submerged arc welding on the preheated part of the double rope groove pulley. The equipment includes: rolling tire stand, side guide wheel and welding equipment. The embodiment of the present invention adopts the tire frame to vertically place the double rope groove pulley to be welded, and rotates the double rope groove pulley to be welded through the tire frame to keep the welding seam position unchanged. The penetration depth is large, the welding quality is good and stable, and the first pass rate is high, which greatly shortens the production cycle and saves manufacturing costs.

Description

A welding method and welding equipment for a double rope groove pulley

technical field

The invention relates to the technical field of mechanical manufacturing, in particular to a welding method and welding equipment for a double rope groove pulley.

Background technique

In ship lifts, double rope groove pulleys with large diameters (such as 3.5m-5.5m in diameter) are usually used. This large-diameter double-groove pulley is usually welded from several parts, which usually include large steel rings, small steel rings, webs, hubs, ribs and rims. A rim is welded at both ends of the large steel ring, while the small steel ring is welded between the rim and the hub through the web. Among them, the thickness of the large steel ring is generally 35mm-45mm, and the length of the weld between it and the rim is 10m-20m, requiring 200kg-400kg of deposited metal, and the amount of deposited metal is large.

When adopting existing welding method to weld big steel ring and wheel rim, be to put big steel ring and wheel horizontally usually, welding position is horizontal welding, and the workman can only carry out manual welding.

In the process of realizing the present invention, the inventor finds that there are at least the following problems in the prior art:

When welding the large steel ring and the rim, the welding position is horizontal welding, and the amount of deposited metal is large, so it is easy to produce incomplete fusion and incomplete penetration, and the quality of the weld seam is not easy to be guaranteed. In the subsequent manufacturing process, it is necessary to increase A large amount of welding seam repair time will not only lead to a long manufacturing period of the double rope groove pulley, but also cause large welding deformation and increase the manufacturing cost.

Contents of the invention

In order to solve the problem in the prior art that the weld seam quality cannot be guaranteed when welding the large steel ring and rim of the double-groove pulley, an embodiment of the present invention provides a welding method and welding equipment for the double-groove pulley. Described technical scheme is as follows:

On the one hand, an embodiment of the present invention provides a welding method for a double rope groove pulley, the method includes.

placing at least one double-groove pulley to be welded on the roller stand and keeping the axis of said double-groove pulley horizontal;

Preheating the part to be welded of the double rope groove pulley to 100°C-150°C;

Submerged arc welding is performed on the preheated part of the double rope groove pulley.

Preferably, before said vertically placing at least one double rope pulley to be welded on the roller stand, said method further comprises:

At least two of said double rope pulleys are axially secured together by locking means.

Preferably, the locking device includes a cylinder, a cover plate and a bolt, the outer diameter of the cylinder matches the inner hole of the hub of the double rope groove pulley, and an outer flange is provided at one end of the cylinder, The cover plate is fixed on the other end of the cylinder through the bolts, and the at least two double rope pulleys are fixed between the outer flange and the cover plate.

Specifically, the position to be welded includes the current point to be welded and 70mm-90mm on both sides of the welded point.

Specifically, the submerged arc welding is carried out using an automatic welding trolley.

Specifically, the welding wire used in the submerged arc welding is H10Mn2, the flux is HJ350, the welding current is 700A-750A, the welding voltage is 36V-38V, and the welding speed is 38cm/min-45cm/min.

On the other hand, an embodiment of the present invention provides a welding device for a double rope groove pulley, the equipment includes: a tire frame for placing and rotating the double rope groove pulley to be welded, and a tire frame arranged on both sides of the tire frame side guide wheels and welding equipment, the side guide wheels are arranged close to the end face of the double rope groove pulley.

Preferably, said apparatus further comprises locking means for axially securing together at least two of said double rope pulleys.

Preferably, the locking device includes a cylinder, a cover plate and a bolt, the outer diameter of the cylinder matches the inner hole of the hub of the double rope groove pulley, and an outer flange is provided at one end of the cylinder, The cover plate is fixed on the other end of the cylinder through the bolts, and the at least two double rope pulleys are fixed between the outer flange and the cover plate.

Preferably, the welding equipment is an automatic welding trolley.

The beneficial effect brought by the technical solution provided by the embodiment of the present invention is that the double rope groove pulley to be welded is vertically placed by using the tire frame, and the double rope groove pulley to be welded is rotated by the tire frame to keep the weld position In this case, submerged arc welding is used for horizontal welding, which has a large penetration depth, good and stable welding quality, and a high first pass rate, which greatly shortens the production cycle and saves manufacturing costs.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings that need to be used in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained based on these drawings without creative effort.

Fig. 1 a is a schematic cross-sectional structure diagram of a double rope groove pulley;

Fig. 1b is the enlarged schematic view of the I position of the double rope groove pulley in Fig. 1a;

Fig. 2 is the flowchart of the welding method of a kind of double rope groove pulley provided in the embodiment 1 of the present invention;

Fig. 3 is a schematic diagram of the structure and usage status of a welding device with double rope groove pulleys provided in Embodiment 2 of the present invention;

Fig. 4 is a schematic structural diagram of the locking device provided in Embodiment 2 of the present invention.

Detailed ways

In order to make the object, technical solution and advantages of the present invention clearer, the implementation manner of the present invention will be further described in detail below in conjunction with the accompanying drawings.

For ease of description, the structure of the large-diameter double-groove pulley will be briefly introduced below in conjunction with FIGS. 1a-1b. As shown in Figures 1a-1b, a double rope groove pulley usually includes a large steel ring 1, a small steel ring 2, a spoke plate 3, a hub 4, ribs 5, and a rim 6. Among them, the welding seam between the large steel ring and the wheel rim adopts a single-sided 45° groove, which requires one-sided welding and double-sided molding. A rim 6 is welded at both ends of the large steel ring 1 , while the small steel ring 2 is welded between the rim 6 and the hub 4 through the web 3 . Wherein, the thickness of the large steel ring 1 is generally 35mm-45mm, and the length of the weld between it and the rim 6 is 10m-20m, requiring 200kg-400kg of deposited metal.

Example 1

As shown in Figure 2, an embodiment of the present invention provides a welding method for a double rope groove pulley, the method comprising:

Step 201: Place at least one double-groove pulley to be welded on the roller frame and keep the axis of the double-groove pulley horizontal.

Specifically, side guide wheels can be arranged on both sides of the tire frame. When the double rope groove pulley is placed on the tire frame, the side guide wheels are close to the end face of the double rope groove pulley, preferably in contact with the double rope groove pulley. But it does not hinder its circular rotation, so as to prevent the double rope groove pulley from toppling over.

Preferably, before the step 201, the method further includes: axially fixing at least two double rope pulleys together. In this way, several double rope pulleys can be placed at one time, saving working time.

Specifically, in this embodiment, at least two double rope pulleys can be axially fixed together by a locking device. The locking device may include a cylinder, a cover plate and bolts, the outer diameter of the cylinder matches the inner hole of the hub of the double rope groove pulley, one end of the cylinder is provided with an outer flange, and the cover plate is fixed on the cylinder by bolts. At the other end, at least two double rope pulleys are fixed between the outer flange and the cover plate. The locking device of this embodiment is easy to assemble and disassemble, and can further improve work efficiency. The locking device can also be a steel plate.

Step 202: Preheat the part to be welded of the double rope groove pulley to 100°C-150°C.

Specifically, a flame gun can be used for preheating, and the double rope groove pulley is turned while heating to ensure uniform preheating.

Further, the site to be welded includes the weld seam and 70mm-90mm on both sides of the weld seam.

Step 203: Perform submerged arc welding on the preheated part of the double rope groove pulley.

Preferably, an automatic welding trolley is used for submerged arc welding. The use of automatic welding equipment can ensure good and stable welding quality, increase welding speed, greatly shorten production cycle, and reduce labor intensity of workers. Optionally, a cross manipulator can also be used for welding.

Further, the welding wire used in submerged arc welding is H10Mn2, the flux is HJ350, the welding current is 700A-750A, the welding voltage is 36V-38V, and the welding speed is 38cm/min-45cm/min. The welding wire has low cost and can further save manufacturing cost.

The embodiment of the present invention adopts the tire frame to vertically place the double rope groove pulley to be welded, and rotates the double rope groove pulley to be welded through the tire frame to keep the welding seam position unchanged. In this case, submerged arc Horizontal welding, large penetration depth, good and stable welding quality, high first pass rate, greatly shortening the production cycle and saving manufacturing costs.

Example 2

An embodiment of the present invention provides a welding device for a double rope groove pulley, which is suitable for realizing the welding method described in Embodiment 1. As shown in Figure 3, this welding equipment comprises: be used to place and rotate the pulley frame 8 of the double rope groove pulley to be welded, be arranged on the side guide pulley 9 of the both sides of slide tire frame 8 and welding equipment 10, side guide The pulley 9 is arranged close to the end face of the double groove pulley 12 .

Preferably, the welding device also comprises locking means 7 for axially securing together at least two double rope pulleys. In this embodiment, 4 double-groove pulleys.

In this embodiment, as shown in Figure 4, the locking device 7 includes a cylinder 71, a cover plate 72 and a bolt 73, the outer diameter of the cylinder 71 matches the inner hole of the hub of the double rope groove pulley 12, and the cylinder 71 One end of 71 is provided with outer flange 74, and cover plate 72 is fixed on the other end of cylinder 71 by bolt 73, and at least two double rope groove pulleys 12 are fixed between outer flange 74 and 72 cover plates. The locking device has a simple structure and is convenient for assembly, disassembly and positioning. In other embodiments, the locking device 7 can also use a steel plate.

Preferably, the welding equipment 12 is an automatic welding trolley. The welding equipment 12 may also be a cross-handling machine.

It is easy to know that because the diameter of the double rope groove pulley is large, a welding platform 11 needs to be provided, and the automatic welding trolley 10 is arranged on the welding platform 11 .

The embodiment of the present invention adopts the tire frame to vertically place the double rope groove pulley to be welded, and rotates the double rope groove pulley to be welded through the tire frame to keep the welding seam position unchanged. In this case, submerged arc Horizontal welding, large penetration depth, good and stable welding quality, high first pass rate, greatly shortening the production cycle and saving manufacturing costs.

Adopt the welding method and the welding equipment of the embodiment of the present invention to weld 128 double rope groove pulleys (the diameter is 5m, the thickness of the big steel ring is 45mm, the wheel rim and the big steel ring all adopt Q345D low-alloy high-strength steel to make, and each double rope groove After the weld metal deposited by the rope groove pulley reaches 400kg), the pass rate is over 99.8% after ultrasonic non-destructive testing. Compared with the existing technology, it can save about 600,000 yuan in raw material cost and labor cost, and the production cycle is doubled. above.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection of the present invention. within range.

Claims (10)

1. the welding method of a duplex type groove pulley is characterized in that, said method comprises:

At least one duplex type groove pulley to be welded is placed on the roller moulding bed and keeps the axis of said duplex type groove pulley to be level;

The position to be welded of said duplex type groove pulley is preheated to 100 ℃-150 ℃;

Submerged arc welding is carried out at position to after the preheating of said duplex type groove pulley.

2. welding method as claimed in claim 1 is characterized in that, said vertically be placed at least one duplex type groove pulley to be welded on the roller moulding bed before, said method also comprises:

At least two said duplex type groove pulleys are passed through the locking device axial restraint together.

3. welding method as claimed in claim 2; It is characterized in that; Said locking device comprises cylinder, cover plate and bolt, and the endoporus of the wheel hub of the external diameter of said cylinder and said duplex type groove pulley is complementary, and an end of said cylinder is provided with outward flange; Said cover plate is through the said other end that is bolted to said cylinder, and said at least two duplex type groove pulleys are fixed between said outward flange and the said cover plate.

4. welding method as claimed in claim 1 is characterized in that, said position to be welded comprises weld seam and said weld seam both sides 70mm-90mm.

5. welding method as claimed in claim 1 is characterized in that, said submerged arc welding adopts automatic weldering dolly to carry out.

6. welding method as claimed in claim 5 is characterized in that, the welding wire that said submerged arc welding is adopted is that H10Mn2, solder flux are that HJ350, welding current are that 700A-750A, weldingvoltage are that 36V-38V, speed of welding are 38cm/min-45cm/min.

7. the welding equipment of a duplex type groove pulley is used for realization like each described welding method of claim 1-6, it is characterized in that said equipment comprises:

Be used to place and rotate duplex type groove pulley to be welded the pulley moulding bed, be arranged on the side guide wheel and the welding equipment of said pulley moulding bed both sides, said side guide wheel is near the end face setting of said duplex type groove pulley.

8. welding equipment as claimed in claim 7 is characterized in that, said equipment also comprises and being used at least two said duplex type groove pulley spindles to the locking device that is fixed together.

9. welding equipment as claimed in claim 8; It is characterized in that; Said locking device comprises cylinder, cover plate and bolt, and the endoporus of the wheel hub of the external diameter of said cylinder and said duplex type groove pulley is complementary, and an end of said cylinder is provided with outward flange; Said cover plate is through the said other end that is bolted to said cylinder, and said at least two duplex type groove pulleys are fixed between said outward flange and the said cover plate.

10. welding equipment as claimed in claim 7 is characterized in that, said welding equipment is to weld dolly automatically.

Images