A camshaft may include a support shaft and a component with a passage opening that receives the support shaft. The support shaft may include fastening regions and positioning regions alternating in an axial direction. A diameter of the support shaft in the fastening regions may be greater than a diameter of the support shaft in the positioning regions. Furthermore, the passage opening of the component may include axially spaced fastening sections with positioning sections arranged between pairs of the fastening sections. A diameter of the passage opening in the fastening sections may be smaller than a diameter of the passage opening in the positioning sections. Further, the diameter of the support shaft in the positioning regions may be smaller than the diameter of the passage opening in the fastening sections, and the diameter of the support shaft in the fastening regions may be smaller than the diameter of the passage opening in the positioning sections.

A joined prefabricated individual cam includes multiple cams for an adjustable camshaft in particular for an internal combustion engine of a motor vehicle. The camshaft has two shafts mounted concentrically one inside the other, namely an inner shaft and an outer shaft. The joined multiple cam is fixedly pinned to the inner shaft via radial openings provided in the outer shaft with a rotatable bearing on the outer shaft. Such a multiple cam has at least one prefabricated individual cam which is placed as a cam ring on the outside circumference of a carrier pipe at an axial distance from the neighboring individual cams and is fixedly connected to this carrier pipe at a predetermined angle of rotation and axial distance assignment.

A method for producing a camshaft module and a camshaft module are provided. The camshaft module includes a camshaft and a bearing frame having bearing devices with cut-outs. The camshaft includes a shaft and cams having cut-outs. The shaft has at least two different outside diameters. At least some of the cams and/or some of the bearing devices have cut-outs of differing diameters. The bearing frame is supported during shaft insertion to be movable along a movement axis during production of the camshaft module and to be substantially rigid along an insertion direction of the shaft. The shaft is inserted into the bearing frame in the insertion direction in such a way that interference fit is obtained in each case at least between the shaft and at least some of the cams. A predefined target distance between two elements such as a gear located outside of the bearing frame and a cam or bearing device located inside of the bearing frame adjacent to the element outside of the bearing frame may be obtained by partially inserting the shaft, determining a distance between the two elements, and applying an insertion force to the shaft based on the determined distance to advance the shaft to result in setting the distance between the two elements to the target distance.

A method for producing a ready-for-use camshaft for controlling valves of an internal combustion engine may be directed towards camshafts that include a carrier shaft on which an end component, for example, a drive wheel, a phase adjuster, or a part of a phase adjuster, is arranged and cam elements that are attached in a positionally fixed manner to the carrier shaft. In some examples, the method comprises providing a carrier shaft and an end component, joining the end component to the carrier shaft, grinding at least the carrier shaft to form cam seats so as to establish readiness for use, introducing a surface profile into a first cam seat, providing a cam element with ready-for-use characteristics, seating the cam element on the cam seat with the surface profile, and repeating certain steps for additional cam elements.

A method for arranging a camshaft in a camshaft module includes arranging cam elements and a switching element on a carrier tube to so as to form a displacement element having a bearing section, outside or external to a module housing. The carrier tube is then cut in a region of a bearing section to form two parts. One of the parts is arranged into a bearing bridge in a module housing. The other part is then joined to the first part that was inserted into the bearing bridge.

The present invention relates to a slider driving mechanism on a CNC assembly machine for assembled camshaft. The mechanism includes a servo motor (1), the host frame (5), ball screw (6), linear guides (9) and the slider body (8), wherein, the servo motor (1), ball screw (6) and linear guides (9) are mounted vertically on the host frame (5). The servo motor (1) connects with the ball screw. The slider body (8) connects with both the ball screw (6) and the linear guides (9). It is driven by a ball screw (6) and moves along a linear guides (9) in the vertical direction. The present invention is novel. It not only can greatly improve the assembly speed of cam, hexahedron on assembled camshaft and improve productivity, but also can eliminate complex gear system. It makes the manufacturing and processing more simple. The installation is also more convenient. It can further improve product quality and manufacturing precision of assembled camshaft.

A device for heating a plurality of functional or receiving elements, such as a cam, balancing mass, gearwheel and/or a bearing, may include a plurality of holding balconies disposed above one another along an axis each associated with a respective receiving element, a plurality of workstations includes a loading station, a heating station and an unloading station, and an induction heating device including a plurality of accommodation elements. The plurality of holding balconies may be individually movable in an axial direction of an axis, and/or having a greater spacing in the axial direction with respect to one another in the loading station and/or the unloading station than in the heating station. The plurality of accommodation elements may be jointly adjustable in the axial direction.

A device for jointing a plurality of elements, each comprising a cutout for a shaft, in a predetermined angular position on the shaft, may include a traversable guide carriage configured to push the shaft from above through the cutouts of the elements. The device may also include an electrical spindle drive and a pneumatic piston for displacing the traversable guide carriage.

A device for positioning a number of function elements, each having a recess for a shaft, in a predetermined angle position on the shaft, may include a plurality of support balconies arranged one above the other, each being destined for a function element. A movable guide carriage may be configured to enable the shaft to be push the shaft from above through the recesses of the function elements. The support balconies may each include at least one gripper respectively fixing one function element. The at least one gripper may be arranged on an associated gripper carriage and may be adjustable in an x-direction and a y-direction relative to the associated gripper carriage and the support balcony. The associated gripper carriage may be mounted on the support balcony so as to be rotatable about a z-axis.

An apparatus for assembling an overhead camshaft that comprises a hollow outer shaft having at least one slot formed, an inner shaft having at least one pin hole formed, at least one first cam lobe, and at least one second cam lobe. The apparatus comprises a first fixture having two journals, on which the outer shaft is disposed, formed at opposite ends thereof. A second fixture has a plurality of journals on which at least two of the at least one first cam lobe and the at least one second cam lobe are disposed. A third fixture restricts upward and downward and rotational movements of at least one of the outer shaft, the at least one first cam lobe, and the at least one second cam lobe.