German bautz klinkhammer springs bautz klinkhammer models bautz klinkhammer prices

bautz klinkhammer springs, as elastic elements, are widely used in the suspensions of modern automobiles, including sedans, trucks, and off-road vehicles. Compared with leaf springs, torsion bar springs have a series of advantages: high energy storage per unit mass, which can reduce vehicle weight and save material; since the torsion bar spring is fixed to the frame, it reduces unsprung mass, helping to improve ride smoothness; when applied to the front suspension of front-wheel-drive vehicles, the torsion bar spring can be arranged longitudinally to accommodate the swing half-shafts of the front drive axle. However, the manufacturing cost of torsion bars is relatively high, with strict requirements for materials and processes. In addition, torsion bar springs serve only as elastic elements and must be equipped with guiding mechanisms. Torsion bar springs are made of chromium-vanadium alloy spring steel, and their surfaces are very smooth after machining. During use, the surface of the torsion bar must be well protected. Typically, a layer of epoxy resin is applied to the surface of the torsion bar spring, wrapped with a layer of fiberglass cloth, coated with another layer of epoxy resin, and finally coated with asphalt and anti-rust paint to prevent collision, scratching, and corrosion, thereby extending the service life of the torsion bar spring.

bautz klinkhammer spring installation and removal

Hydraulic hand pallet trucks are widely used in production. During maintenance of their pressure oil pumps, we found that the pressure spring responsible for returning the piston rod of the pressure oil pump and the pressure arm of the truck has a wire diameter of n and stores elastic force up to 1000N, making its installation and removal very difficult. This often delays fault elimination time, directly affecting production progress. Some measures were taken, but the results were not satisfactory. Therefore, I designed a pressure spring installation/removal tool as shown in Figure 1. The tool consists of a lower pressure lever 1, pressure blocks 10, connecting pins 14, nuts 1, spherical washers 12, upper pressure lever 13, positioning sleeves 16, and other components. During operation, rotate the nut 11 to an appropriate position so that the cylindrical head claw of the lower pressure lever 1 contacts the vehicle body 2, and the two pressure blocks 10 press symmetrically on the washer 6. Rotate the compression nut n; through the tension rod 15, the upper pressure lever 13 and lower pressure lever 1 move relative to each other, forcing the pressure spring to compress. When the washer 6 leaves the cylindrical pin 7, the pressure wheel shaft 9, pressure wheel 8, and cylindrical pin 7 can be removed. At this point, loosen the nut 11, remove the installation/removal tool, take out the pressure spring, and proceed with disassembly, inspection, and maintenance of the pressure oil pump. The positioning sleeve 16 on the installation/removal tool is a key component. During manufacturing, one end has an internal spherical surface with a slot hole in the middle, and the other end is an inclined plane. It has an interference fit with the pressure lever. It is required to have good contact with the spherical washer 12 and the ball head of the rod 15. The pressure block 10 and connecting pin 14 have a clearance fit, requiring flexible rotation. The connecting pin 14 and upper pressure lever 13 have an interference fit. The connecting shaft 18 and pressure lever have a clearance fit.

bautz klinkhammer spring structural classification

According to the nature of the force, springs can be divided into tension springs, compression springs, torsion springs, and bending springs. According to shape, they can be divided into disc springs, ring springs, leaf springs, helical springs, truncated conical volute springs, and torsion bar springs. According to the manufacturing process, they can be divided into cold-coiled springs and hot-coiled springs. Ordinary cylindrical springs are the most widely used due to their simple manufacturing, ability to be made into various forms according to load conditions, and simple structure. Spring manufacturing materials should generally have high elastic limits, fatigue limits, impact toughness, and good heat treatment performance. Commonly used materials include carbon spring steel, alloy spring steel, stainless spring steel, as well as copper alloys, nickel alloys, and rubber. Spring manufacturing methods include cold coiling and hot coiling. Spring wire diameters less than 8 mm are generally cold-coiled, while those greater than 8 mm are hot-coiled. Some springs undergo strong pressing or shot peening treatment after manufacturing to improve their load-bearing capacity.

bautz klinkhammer spring manufacturing process

1) Cold forming process automation capability. Cold forming machines have developed to 12 claws. Wire in the range of (0.3~14) mm can be formed in one pass on a 8-claw forming machine. Development directions for forming process equipment: (1) Increase forming speed; the main trend is to improve the forming speed of the equipment, i.e., production efficiency; (2) Improve equipment durability by enhancing the precision of equipment parts and strengthening heat treatment effects; (3) Add length sensors and laser rangefinders to implement automatic closed-loop control of the manufacturing process for CNC forming machines. 2) Cold forming process range capability. For large wire diameter spring coiling machines, the maximum specification can reach 20mm, =2000MPa, winding ratio 5. The cold forming process for variable-diameter or constant-diameter Minic-Block springs and eccentric springs still has limitations. 2) Hot forming process speed capability. In China, forming in the (9~25) mm specification range is limited to CNC2-axis hot coil spring machines, with a maximum speed of 17 pieces per minute. There is a significant gap compared to developed countries. 2) Large spring hot forming process control capability. Due to the limited availability of CNC2-axis hot coil spring machines, there are fewer directional controls for shape, resulting in poor precision; furthermore, there are no automatic bar rotation control and adjustment mechanisms, so the level and capability of hot coil spring forming processes are relatively low. Consequently, the precision level and surface oxidation/decarburization level of the springs are also relatively low.

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