Automatic tool assembling mechanism of down presser of bending machine

Abstract

The application discloses a bending machine automatic assembly mechanism of a lower pressing knife, which comprises a lower pressing knife assembly and a knife seat for mounting the lower pressing knife assembly; the lower pressing knife assembly is assembled on the knife seat through a single lower pressing knife unit; dovetail-shaped assembly guide rails are arranged on the knife seat, and the lower end of each lower pressing knife unit is provided with a dovetail groove corresponding to the assembly guide rails; the lower pressing knife unit is correspondingly clamped on the assembly guide rails of the knife seat through the dovetail groove, and the lower pressing knife unit can move left and right on the assembly guide rails. The automatic assembly work of the lower pressing knife can be realized, the lower pressing knife assembly is set as the split lower pressing knife unit, and the lower pressing knife unit can move left and right automatically under the cooperation of various mechanisms to realize the assembly of the lower pressing knife, and the automatic bending of various special-shaped workpieces can be realized, including the case that the upper and lower bending edges exist at the same time, and the structure design is ingenious and reasonable, and the application is convenient to use.

Description

Technical Field

[0001] This invention relates to the field of bending knife technology, specifically to an automatic blade-aligning mechanism for the lower pressing blade of a bending machine. Background Technology

[0002] Flexible sheet metal bending centers, with their "one set of molds, multi-axis linkage" characteristics, can easily complete bending of various complex shapes such as arcs, pressed edges, U-shapes, and closed shapes, without the need to change special molds for different shapes. This makes them widely used in many industries: mainly in the production of filing cabinets, tool cabinets, kitchenware, home appliances, furniture, ventilation and air conditioning equipment, etc.

[0003] A flexible bending center is a highly integrated automated device. Its core principle is to drive the upper and lower bending cutters to move in tandem through full servo drive and multi-axis linkage control, while using a vacuum chuck to clamp and position the sheet metal, thereby achieving high-precision, die-free (or universal die-free) bending of metal sheets. A flexible bending center typically consists of the following core components: frame and bed, servo drive system, bending actuator, upper and lower bending cutters, and auxiliary systems.

[0004] Despite its significant advantages, the flexible sheet metal bending center also has some limitations: 1. High initial investment cost: As a high-end equipment integrating multiple advanced technologies, its purchase cost is much higher than that of traditional bending machines, which requires a certain level of financial strength from enterprises. 2. Limited processing range: The equipment has specific specifications for the thickness and size of the plates it can process; for example, most equipment is suitable for processing plates with a thickness of 0.35mm to 3mm, while thicker plates require a special thick plate machine. 3. High maintenance requirements: The equipment integrates sophisticated mechanical, electrical and control systems, which requires a high level of technical expertise for maintenance. Although its structural design tends to be simplified, the maintenance of core components still requires professional personnel. 4. Relatively limited sheet metal shapes: The equipment often cannot complete ultra-high bending edges, such as bending edges with four sides 800mm high. It is also difficult to complete workpieces with both upper and lower bending edges on the last cut of all four sides, and the completion rate is relatively low, making it difficult to unload the material.

[0005] In particular, situations where the shape of the workpiece being bent is relatively limited often occur during actual bending. Usually, the length of the lower pressure knife at the bending center is fixed, and the lower pressure knife is usually set as an integral structure, and the length of the lower pressure knife cannot be adjusted. If some irregularly shaped workpieces are encountered, or if there are corresponding requirements for the bending length of the workpiece, the existing integrated bending machine that cannot adjust the bending length and cannot automatically adjust the blade alignment cannot meet the requirements.

[0006] Therefore, in order to solve the above problems, it is necessary to develop a bending machine lower cutter automatic cutter assembly mechanism with a reasonable structure that can realize automatic cutter assembly. Summary of the Invention

[0007] The purpose of this invention is to address the shortcomings of existing technologies by providing an automatic blade-aligning mechanism for the lower pressure blade of a bending machine; the technical solution is as follows: An automatic blade assembly mechanism for a bending machine's lower cutter includes a lower cutter assembly and a blade holder for mounting the lower cutter assembly. The lower cutter assembly is formed by assembling individual lower cutter units on the blade holder. The blade holder is provided with a dovetail-shaped blade assembly guide rail, and the lower end of each lower cutter unit is correspondingly provided with a dovetail groove. The lower cutter unit is correspondingly engaged on the blade assembly guide rail of the blade holder through the dovetail groove, and the lower cutter unit can move left and right on the blade assembly guide rail accordingly. Each pressing blade unit is also provided with a blade-shifting half-groove at the splicing side wall. When two adjacent pressing blade units are spliced, the blade-shifting half-grooves on both sides correspond to form a complete blade-shifting groove. It also includes a blade-shifting rod that can move left and right and forward and backward. When the blade-shifting rod moves forward, it can be inserted into the blade-shifting groove. When it moves left and right while inserted into the blade-shifting groove, it drives the pressing blade unit to move left and right on the blade-splitting guide rail.

[0008] Furthermore, the blade guide rail is provided in two shapes and is dovetail-shaped, with a groove between the two blade guide rails, and the shape of the dovetail groove at the lower end of the lower pressing blade unit is correspondingly provided. The front end of the lever is provided with a downward vertical bend. After the lever extends into the lever groove, the bend at the front end can move downward and embed itself into the groove.

[0009] Furthermore, a lead screw moving mechanism is installed on the front end of the tool holder, and a corresponding moving seat is installed on the lead screw moving mechanism. The moving seat moves left and right under the drive of the lead screw moving mechanism, and the moving direction is parallel to the tool guide rail.

[0010] Furthermore, the lead screw moving mechanism includes a lead screw motor, a lead screw spindle integrated with the lead screw motor, a lead screw seat mounted on the lead screw spindle, and lead screw guide rails disposed above and below the lead screw spindle; the moving seat is correspondingly fixed on the lead screw seat and moves left and right with the lead screw seat.

[0011] Furthermore, the movable seat is also equipped with a corresponding lifting seat via lifting guide rails on both sides, and a vertical fixed rack is installed in the middle of the movable seat. A reducer is installed on the lifting seat, and an output gear that meshes with the fixed rack is installed on the output shaft of the reducer. When the output gear rotates, it drives the lifting seat to move up and down.

[0012] Furthermore, the upper end of the lifting seat is also provided with a knife holder, on which a knife holder cylinder is installed. The extension direction of the main shaft of the knife holder cylinder is perpendicular to the extension direction of the knife guide rail. A knife plate is also installed on the main shaft of the knife holder cylinder. The knife lever is correspondingly installed on the knife plate and is inserted forward into the knife slot under the drive of the knife holder cylinder. A knife guide rail is also installed between the knife plate and the knife holder.

[0013] Furthermore, the blade plate is also provided with a sensing plate, on which a sensor is installed, and each lower front end of the pressing blade unit is also provided with a corresponding sensing groove. The sensor and the lever move together with the lever plate. When the position of the sensing slot corresponds to the position of the sensor, the position of the lever corresponds to the position of the lever slot. Under the action of the lever cylinder, the lever extends into the lever slot.

[0014] Beneficial effects: The present invention has the following beneficial effects: 1) This invention can realize the automatic splicing of the pressing knife. After the pressing knife component is set as a split pressing knife unit, it can move left and right autonomously to splice the knife under the coordinated movement of various mechanisms. It can adapt to the automatic bending of various irregular workpieces, including some cases where the upper and lower bending edges exist at the same time. The structure is ingenious and reasonable and easy to use. 2) The present invention provides a structure for a downward pressing knife unit, which is provided with a knife-pulling half-groove and can be spliced ​​into an integral knife-pulling groove; in addition, a dovetail groove is provided to be fitted into the knife-jointing guide rail, so that the downward pressing knife unit can move on the knife-jointing guide rail. 3) The present invention is provided with a lead screw moving mechanism that can drive the pawl lever to move left and right, a reducer and lifting seat that can drive the pawl lever to move up and down, and a pawl cylinder and pawl plate that can drive the pawl lever to extend into the pawl slot. The structure is reasonable. 4) The present invention also includes a sensor that moves together with the lever. The sensor is used to locate the position of the pressing blade unit to be moved, thereby locating the length of the pressing blade unit and realizing the lever movement. Attached Figure Description

[0015] Figure 1 This is a structural diagram of the present invention; Figure 2 This is a diagram showing the position of the tool holder in this invention; Figure 3 This is a structural diagram of the lower pressing knife unit in this invention; Figure 4 This is a structural diagram of the blade guide rail in this invention; Figure 5 This is a structural diagram of the lead screw moving mechanism in this invention; Figure 6 This is a diagram showing the mounting position of the fixed rack in this invention; Figure 7 This is a diagram showing the position of the knife holder in this invention; Figure 8 for Figure 7 Diagram showing the location of the middle cutter holder after disassembly. Detailed Implementation

[0016] The present invention will be further illustrated below with reference to the accompanying drawings and specific embodiments. These embodiments are implemented based on the technical solutions of the present invention, and it should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention.

[0017] like Figure 1 and Figure 2 As shown, an automatic blade assembly mechanism for a bending machine includes a blade assembly 1 and a blade holder 2 for mounting the blade assembly 1. The blade assembly 1 is assembled on the blade holder 2 by individual blade units 3. The blade holder 2 is provided with a dovetail-shaped blade assembly guide rail 5, and the lower end of each blade unit 3 is provided with a dovetail groove 4. The blade unit 3 is correspondingly engaged on the blade assembly guide rail 5 of the blade holder 2 through the dovetail groove 4, and the blade unit 3 can move left and right on the blade assembly guide rail 5 accordingly. like Figure 3 As shown, each pressing knife unit 3 is also provided with a knife-pulling half-groove 6 at the splicing side wall. When two adjacent pressing knife units 3 are spliced, the knife-pulling half-groove 6 on both sides correspond to form the overall knife-pulling groove 7. It also includes a knife-pulling rod 8 that can move left and right and forward and backward. When the knife-pulling rod 8 moves forward, it can be inserted into the knife-pulling groove 7. When it moves left and right while inserted into the knife-pulling groove 7, it drives the pressing knife unit 3 to move left and right on the splicing guide rail 5.

[0018] There are two blade guide rails 5, which are dovetail-shaped. A groove 9 is provided between the two blade guide rails 5. The shape of the dovetail groove 4 at the lower end of the lower pressing unit 3 is correspondingly provided. like Figure 4 As shown, the front end of the lever 8 is provided with a downwardly bent portion 10. After the lever 8 extends into the lever groove 7, the bent portion 10 at the front end can move downward and be embedded into the groove 9.

[0019] like Figure 5 As shown, a lead screw moving mechanism is installed on the front end of the tool holder 2, and a corresponding moving seat 11 is installed on the lead screw moving mechanism. The moving seat 11 moves left and right under the drive of the lead screw moving mechanism, and the moving direction is parallel to the tool guide rail 5.

[0020] The lead screw moving mechanism includes a lead screw motor 12, a lead screw spindle 13 integrated with the lead screw motor 12, a lead screw seat 14 mounted on the lead screw spindle 13, and lead screw guide rails 15 disposed above and below the lead screw spindle 13; the moving seat 11 is correspondingly fixed on the lead screw seat 14 and moves left and right with the lead screw seat 14.

[0021] like Figure 6 As shown, the movable seat 11 is equipped with a corresponding lifting seat 17 via lifting guide rails 16 on both sides, and a vertical fixed rack 18 is installed in the middle of the movable seat 11. A reducer 19 is installed on the lifting seat 17, and an output gear 20 that meshes with the fixed rack 18 is installed on the output shaft of the reducer 19. When the output gear 20 rotates, it drives the lifting seat 17 to move up and down.

[0022] like Figure 7 and Figure 8 As shown, the upper end of the lifting seat 17 is also provided with a knife holder 26, on which a knife holder cylinder 21 is installed. The extension direction of the main shaft of the knife holder cylinder 21 is perpendicular to the extension direction of the knife guide rail 5. A knife plate 22 is also installed on the main shaft of the knife holder cylinder 21. The knife lever 8 is correspondingly installed on the knife plate 22 and is inserted forward into the knife slot 7 under the drive of the knife holder cylinder 21. A knife guide rail 27 is also installed between the knife plate 22 and the knife holder 26.

[0023] The blade plate 22 is also provided with a sensing plate 23, on which a sensor 24 is installed. Each pressing blade unit 3 is also provided with a corresponding sensing groove 25 at the lower front end. The sensor 24 and the lever 8 move together with the lever plate 22. When the position of the sensing groove 25 corresponds to the position of the sensor 24, the position of the lever 8 corresponds to the position of the lever groove 7. Under the action of the lever cylinder 21, the lever 8 extends into the lever groove 7.

[0024] The main purpose of this invention is to achieve automatic tool assembly of the pressing tool, thereby forming pressing tool assemblies of different lengths to adapt to different workpieces. The specific working principle of this invention is as follows: This invention specifically sets the shape and structure of the pressing tool assembly and the tool assembly guide rail on the tool holder; for example... Figure 1 and Figure 2 As shown, the tool guide rail on the tool holder is designed with a dovetail structure, while the down-pressing tool assembly is composed of individual down-pressing tool units. Each down-pressing tool unit has a dovetail groove at its lower end. The structural design of each down-pressing tool unit is very important. Each down-pressing tool unit has a tool-pulling half-groove at the side wall where they are joined. When two down-pressing tool units are joined together, a corresponding tool-pulling groove is formed between the two down-pressing tool units. The design of the tool-pulling groove is to enable the engagement of the tool-pulling rod.

[0025] In this invention, the lever can move left and right, forward and backward, and up and down. During operation, the number of pressing units required is first calculated based on the workpiece to be bent. Then, the lever is moved along the guide rail via a lead screw mechanism. A sensor is installed next to the lever via a sensing plate, and the sensor moves with the lever. Each pressing unit has a corresponding sensing groove at its lower end. After the lever moves with the sensor, the sensor positions the lever. When the sensor is aligned with the desired pressing unit... When the sensing slot of the pressure tool assembly is in the correct position, the shift lever also corresponds to the position of the shift lever slot. At this time, the shift lever is driven forward into the shift lever slot by the shift lever cylinder. In order to stabilize the movement, the lifting seat is lowered a certain distance so that the bent part at the front end of the shift lever is embedded in the groove of the tool guide rail. Then, the shift lever is driven to move to the left by the lead screw moving mechanism, which moves all the lower pressure tool units on the left side to one side, leaving the remaining lower pressure tool units to form the lower pressure tool assembly. It can adapt to the bending of workpieces of different lengths. The structure is very ingenious.

[0026] In this invention, the lever can move left and right via a lead screw moving mechanism, with the direction of movement consistent with the direction of the blade guide rail. This movement is achieved through the cooperation of a lead screw motor, a lead screw spindle, a lead screw seat, and a moving seat. After moving into position, the height of the lever needs to be adjusted to correspond with the position of the blade slot. This adjustment is achieved by the cooperation of the output gear of the reducer and the fixed rack to raise and lower the lifting seat. The operation of inserting the lever into the blade slot is achieved by a lever cylinder. The lever is mounted on a lever plate, which is mounted on a lever seat. The lever seat is integrated with the lifting seat, thus enabling raising and lowering. The lever cylinder can directly push the lever into the blade slot. To ensure smooth movement, a blade guide rail is also provided. Furthermore, after the lever enters the blade slot, the bent part at the front end of the lever can be lowered into the groove by raising and lowering, making the structure more stable and reliable.

[0027] The main advantage of this invention is that the pressure cutter assembly is set as a split pressure cutter unit, which can move autonomously left and right to perform cutter assembly under the coordinated movement of various mechanisms. It can adapt to the automatic bending of various irregular workpieces, including some cases where upper and lower bending edges exist at the same time. Although the existing pressure cutter segmentation technology can also achieve cutter assembly of different sizes, it still requires manual adjustment, which is cumbersome.

[0028] The above-described specific embodiments are merely preferred embodiments of the present invention and are not intended to limit the implementation of the present invention or the scope of the claims. All equivalent changes and modifications made in accordance with the scope of patent protection of the present invention should be included within the scope of the present invention patent application.

Claims

1. An automatic blade-aligning mechanism for the lower pressure blade of a bending machine, characterized in that: It includes a pressing knife assembly (1) and a knife holder (2) for mounting the pressing knife assembly (1); the pressing knife assembly (1) is assembled on the knife holder (2) by individual pressing knife units (3); and the knife holder (2) is provided with a dovetail-shaped knife-jointing guide rail (5), and the lower end of each pressing knife unit (3) is provided with a dovetail groove (4), the pressing knife unit (3) is correspondingly locked on the knife-jointing guide rail (5) of the knife holder (2) through the dovetail groove (4), and the pressing knife unit (3) can move left and right on the knife-jointing guide rail (5) accordingly; Each pressing knife unit (3) is also provided with a knife-pulling half groove (6) at the splicing side wall. When two adjacent pressing knife units (3) are spliced, the knife-pulling half grooves (6) on both sides correspond to form the overall knife-pulling groove (7). It also includes a lever (8) that can move left and right and forward and backward. When the lever (8) moves forward, it can be inserted into the lever slot (7). When it moves left and right while inserted into the lever slot (7), it drives the lower pressing unit (3) to move left and right on the blade guide rail (5). The front end of the tool holder (2) is equipped with a screw moving mechanism, and a moving seat (11) is correspondingly installed on the screw moving mechanism. The moving seat (11) moves left and right under the drive of the screw moving mechanism, and the moving direction is parallel to the tool guide rail (5). The moving seat (11) is also equipped with a lifting seat (17) corresponding to the lifting guide rail (16) set on both sides. A vertical fixed rack (18) is also installed in the middle position of the moving seat (11). A reducer (19) is installed on the lifting seat (17). An output gear (20) that meshes with the fixed rack (18) is installed on the output spindle of the reducer (19). When the output gear (20) rotates, it drives the lifting seat (17) to move up and down. The upper end of the lifting seat (17) is also provided with a knife holder (26), on which a knife cylinder (21) is installed. The extension direction of the main shaft of the knife cylinder (21) is perpendicular to the extension direction of the knife guide rail (5). A knife plate (22) is also installed on the main shaft of the knife cylinder (21). The knife lever (8) is correspondingly installed on the knife plate (22) and is inserted forward into the knife slot (7) under the drive of the knife cylinder (21). A knife guide rail (27) is also installed between the knife plate (22) and the knife holder (26).

2. The automatic blade-aligning mechanism for the lower pressure blade of a bending machine according to claim 1, characterized in that: The blade guide rail (5) is provided in two shapes and is in the shape of a dovetail. A groove (9) is provided between the two blade guide rails (5). The shape of the dovetail groove (4) at the lower end of the lower pressing blade unit (3) is correspondingly provided. The front end of the lever (8) is provided with a downwardly bent portion (10). After the lever (8) extends into the lever groove (7), the bent portion (10) at the front end can move downward and be embedded into the groove (9).

3. The automatic blade-aligning mechanism for the lower pressure blade of a bending machine according to claim 1, characterized in that: The lead screw moving mechanism includes a lead screw motor (12), a lead screw spindle (13) integrated with the lead screw motor (12), a lead screw seat (14) mounted on the lead screw spindle (13), and a lead screw guide rail (15) set above and below the lead screw spindle (13); the moving seat (11) is fixed on the lead screw seat (14) and moves left and right with the lead screw seat (14).

4. The automatic blade-aligning mechanism for the lower pressure blade of a bending machine according to claim 1, characterized in that: The blade plate (22) is also provided with a sensing plate (23), on which a sensor (24) is installed, and each lower blade unit (3) has a corresponding sensing groove (25) at its front lower end. The sensor (24) and the lever (8) move together with the lever plate (22). When the position of the sensing groove (25) corresponds to the position of the sensor (24), the position of the lever (8) corresponds to the position of the lever groove (7). The lever (8) extends into the lever groove (7) under the action of the lever cylinder (21).

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