Wednesday, January 27, 2021

Making use of the Flip Maker

Flipping machine appropriates for the H steel welding assembly line, workpiece turnover procedure. It is an essential device to form the welding assembly line of H steel, and it is also required equipment to enhance the automation degree of the production line. It can likewise be used in the turning process of H steel or box beam outside the assembly line.

Transmission Principle and Structure Characteristics of Flip Machine

1. Transmission principle

The flip maker consists of 2 maker bases and four columns, each of which is driven directly by a reducer. The upper pulley-block is the position that changes the motion instructions of the chain and the chain extends and retracts; the lower two guide wheels are used to increase the angle of the chain on the gear so that the sprocket can transfer power to the chain better; the lower one is a slide wheel, which is used to alter the position of the equal weight block on the chain. The upper part of the column is provided with a swing arm and its weight hammer device. Its primary function: when the workpiece needs to be turned over, the swingarm is positioned at an angle, when the swing arm is not required to be turned over, the swingarm is raised, the chain is opened, and the workpiece is simple to be transported back and forth. Four separate systems form an entire, made up of various mixes of the rotation instructions of each active gear, that makes the workpiece increase, fall, flip and reset the chain.

2. Composition of equipment

2 underframes, 4 columns, four swing arms, four cycloidal equipment reducer, and its transmission gadget, weight drove, electrical system, etc.

Description of making use of the flip maker

When the workpiece is not raised, the swingarm is raised because of the function of the heavy hammer, and the two chains are far away from the center of the workpiece; when the workpiece is raised, the swingarm is put at an angle because of the different area and weight of the workpiece. There are 4 states of action :.

  • The workpiece increases, both ends of the chain are required to increase at the same time.
  • The workpiece is turned, one end of the chain is needed to rise and one end to fall.
  • The workpiece drops, the two ends of the chain are required to drop at the same time.
  • The workpiece is reset, the chain action is needed to be opposite to 2.

Visual chain marking remains in the middle position, reset is total.

Keep in mind: Apply yellow paint to the middle of each chain and red paint to mark 2 M from the middle for visual examination.

When a gear is needed to turn, the chain position can be changed by opening and stopping alone or turning a sprocket forward and backward.

In order to prevent forgetting the mark in the middle of the visual chain and triggering the device to break between the gears, a stroke switch is set up on the column. When the equivalent weight block touches the stroke switch, the primary motor cuts off the power supply to make sure security. When the equivalent weight block touches the stroke switch, the cable television insulation and connection condition can be paid more attention to. If the damage and joint loosening are discovered, it must be insulated and tightened up in order to avoid short circuit or electrical shock.

Sunday, January 10, 2021

The distinction between pickling with hydrochloric acid and sulfuric acid

Benefits and disadvantages of marinading hydrochloride

(1) Advantages of pickling with HCl

Although the pickling solution can be either sulphuric acid or hydrochloric acid, hydrochloric acid is mainly used in pickling line production. Due to the fact that the pickling operation can be performed at room temperature, hydrochloric acid has strong chemical solubility to metal oxides, and can successfully pickle a range of metals.

Under the greenhouse, the dissolving pickling of the iron matrix of steel workpiece with hydrochloric acid is much faster than sulfuric acid, and the pickling time is much shorter, so it is simple to manage the pickling procedure efficiently. Therefore, making use of hydrochloric acid to marinade steel workpieces is less most likely to cause "extreme deterioration" and "hydrogen embrittlement".

At room temperature, the surface of the workpiece after marinading is less residue, the surface area quality is greater.

Improve the quality of hydrochloric acid concentration is one of the procedures to enhance the speed of pickling, hydrochloric acid marinading less hydrogen precipitation, so the "hydrogen embrittlement" phenomenon is lighter.

For numerous oxides of iron, the solubility in hydrochloric acid is little, and the solubility in sulfuric acid is relatively large, therefore, using hydrochloric acid is much easier to manage the iron ion content variations, so regarding preserving a greater pickling speed.

For the exact same concentration and temperature level of hydrochloric acid and sulfuric acid, the marinading speed of hydrochloric acid is 1.5 to 2.0 times faster than that of sulfuric acid.

(2) Disadvantages of marinading with HCl

Utilizing hydrochloric acid production expenses are high, unstable, corrosive fog must be installed with the excellent effect of the slander gas equipment, waste acid treatment, and resource recycling procedure are really complex. And sulfuric acid is cheap, simple to transport and store, high concentration of product acid, in a really high pickling temperature level, almost no steam. This is because there are trusted commercial treatment methods for waste acid and wastewater, so before the 1960s, continuous pickling of strip steel was nearly inevitably made with sulfuric acid.

Benefits and downsides of sulfuric acid pickling

(1) Advantages of marinading with sulfuric acid

The production expense of sulfuric acid pickling is lower, and at the same time, it is easier to recycle the waste acid of sulfuric acid than hydrochloric acid

Raising the temperature level can extend the pickling efficiency of sulfuric acid, which is conducive to reducing acid intake and production expenses.

The storage and transportation of focused sulfuric acid do not require the use of acid-resistant materials.

(2)Disadvantages of pickling with Sulfuric acid.

Sulfuric acid in the pickling process of the workpiece iron base of the engraving big, easy to produce hydrogen embrittlement. When the temperature level is expensive, it is simple to trigger "over rust" of the iron matrix and increase the possibility of "hydrogen embrittlement", for that reason, it is necessary to add a corrosion inhibitor to control it.

In order to improve pickling performance, it is required to perform heating and warming operations.

After the workpiece has been marinaded with sulfuric acid, a layer of dark black iron salts remains on the surface, which is not easy to tidy.

Concentrated sulfuric acid can quickly trigger chemistry, so unique care needs to be taken when managing and utilizing it.