Abrégé

Disclosed is a numerically controlled four-roller plate rolling machine with three linked and adjustable rollers, the plate rolling machine comprising: a base (4), two supports (1) positioned on the base (4), and an upper roller (21), a lower roller (22), a first side roller (23) and a second side roller (24) positioned between the two supports (1). The upper roller (21), the lower roller (22), the first side roller (23) and the second side roller (24) are arranged parallel to each other; the lower roller (22) is located directly below the upper roller (21); and the first side roller (23) and the second side roller (24) are located on two sides of the lower roller (22) respectively, wherein the upper roller (21) is mounted on the supports (1) and rotatably connected to the supports (1). The upper roller (21) is driven to rotate by a servo drive device for the upper roller. Two ends of the lower roller (22), the first side roller (23) and the second side roller (24) are mounted respectively to side roller linkage mechanisms (3) on two sides; the relative positions of the three rollers are invariant; and the side roller linkage mechanisms (3) on two sides are respectively connected to the supports (1) and the base (4) via lifting mechanisms (5). The numerically controlled four-roller plate rolling machine with three linked and adjustable rollers is stable in operation, favourably controllable in precise positioning, efficient and highly automated in numerical control, and can easily achieve the rolling of thin-walled cylinder workpieces having a special shape such as an elliptical or square shape, and the shaped product is of high precision and good quality.

Classes IPC  ?

• B21D 5/14 - Cintrage des tôles le long de lignes droites, p. ex. pour former un pli simple par passage entre des rouleaux ou cylindres
• B21C 47/00 - Enroulement, bobinage ou dévidage des fils, bandes ou autres matériaux flexibles métalliques, caractérisés par le fait que ces opérations ne s'appliquent qu'au travail des métaux

Abrégé

A numerical control roundness adjustment machine employing multiple shafts to perform outer circumference reduction and reciprocating bending comprises: a roundness adjustment machine body (1) and a PLC control system (6). The roundness adjustment machine body (1) comprises multiple roller shafts (11) arranged in parallel, fixing members (12) fixing the roller shafts (11), a movement driving mechanism (2) driving the roller shafts (11) to move, and a rotation driving mechanism (3) driving rotation of the roller shafts (11). There are at least three roller shafts (11). Two ends of the roller shaft (11) pass through the fixing members (12), such that the roller shaft (11) is fixed in position in an axial direction thereof. The central position encircled by the multiple roller shafts (11) is an adjustment position. The roller shafts (11) are driven by the movement driving mechanism (2) to move in the axial direction thereof, and to move towards or away from a periphery of a workpiece. The movement driving mechanism (2) and the rotation driving mechanism (3) are connected to the PLC control system (6). The roundness adjustment machine is suitable for roundness adjustment of a cylindrical member and a tubular member, a long small-diameter tubular member and a cylindrical workpiece remaining with a large straight section and formed by a rolling machine in particular. The invention improves adjustment precision and productivity, and reduces production costs.

Classes IPC  ?

• B21D 3/02 - Redressage ou remise en forme des barres, tubes ou profilés métalliques, ou des objets déterminés faits à partir de ces matériaux, qu'ils comportent ou non des parties en tôle au moyen de rouleaux matriceurs
• B21D 3/14 - Reformage

Abrégé

A two-roll differential curvature-varying numerical control rolling machine comprises a machine frame (8), an upper roll shaft (1), a lower roll shaft (2), an upper driving device (4), a lower driving device (11), and a numerical control device (7). The upper roll shaft (1) and the lower roll shaft (2) are mounted on the machine frame (8) in parallel. The upper driving device (4) controls rotation of the upper roll shaft (1), and the lower driving device (11) controls rotation of the lower roll shaft (2). Also disclosed is a method for using the two-roll differential curvature-varying numerical control rolling machine. The difference between the linear speeds of the two roll shafts can be adjusted by adjusting the linear speeds of an upper roll and a lower roll, and a needed curvature is formed in any section in the length direction of a plate. The rolling machine has a simple structure and is operated in a numerical control manner, and curvature-varying shaping is implemented in any section.

Classes IPC  ?

• B21D 5/14 - Cintrage des tôles le long de lignes droites, p. ex. pour former un pli simple par passage entre des rouleaux ou cylindres

Abrégé

A straightening round process of numerical control straightening round machine. One sensor is mounted in the numerical control straightening round machine and connected with a PLC controller. The program built in the PLC controller calculates each straightening round parameter, feedbacks the running state, conveys each process action instruction, and straightens round a cylinder workpiece (3) in numerical control mode. The process is easy to operate, and can calculate the correction amount in real time and generate corresponding data to control each action step of the straightening round machine, thus ensuring the straightening round precise and improving work efficiency and product qualified rate.

Classes IPC  ?

• B21D 3/14 - Reformage

Abrégé

A two-roller bending machine capable of adjusting a bending diameter in a numerical control manner. An upper fixed roller (4) is fixedly disposed. A lower rubber roller (3) is disposed on two lower roller bearing supports (2) below the upper fixed roller (4). The two lower roller bearing supports (2) are fixed on two hydraulic cylinders (7) respectively. Sensor contact devices (6) of a sensor (5) are fixedly connected on the two lower roller bearing supports (2) respectively. A signal input end of a hydraulic control device (9) is connected to a hydraulic signal output end of a numerical control device (8). Workpieces of different diameters can be rolled with the same upper roller mould by changing a gap between the upper fixed roller (4) and the lower rubber roller (3). The sensor (5) can measure a current height of the lower rubber roller (3) in real time, that is, the distance between the upper roller (4) and the lower rubber roller (3). Real-time adjustment is performed through control of the hydraulic cylinders (7), so as to achieve the effect of rolling workpieces of different diameters with the same upper roller mould.

Classes IPC  ?

• B21D 5/14 - Cintrage des tôles le long de lignes droites, p. ex. pour former un pli simple par passage entre des rouleaux ou cylindres