Improved automatic tool changer of numerical control bending machine

Abstract

The improved automatic tool changer of the numerical control bending machine comprises a transmission device and a tool changer body, the transmission device comprises a first servo motor, a first sliding rail and a transmission rod, and the tool changer body comprises a main body, a lead screw guide rail mechanism, a connecting assembly, a base, a tool shifting rod and a sensor assembly. The main body is provided with a first sliding block, a first groove and a second sliding rail, the main body is installed on the first sliding rail, the lead screw guide rail mechanism is installed in the first groove, the connecting assembly comprises a connecting piece and a structural piece, the connecting piece is provided with a second sliding block, the connecting piece is connected with the main body and the lead screw guide rail mechanism, and the structural piece is connected with the main body and the lead screw guide rail mechanism. The base is provided with an air cylinder, the air cylinder is provided with a transmission part, a third sliding rail is arranged below the base, the base is arranged at the bottom of the connecting assembly, the cutter shifting rod is provided with a third sliding block, the cutter shifting rod is connected with the base and the transmission part, and the sensor assembly is located on the side face of the connecting part.

Description

Technical Field

[0001] The invention relates to the technical field of bending machines and bending machine components, in particular to an improved automatic tool changer for a numerically controlled bending machine. Background Art

[0002] The development of bending machines has gone through a long process. Early bending machines mainly relied on manual operation, with low precision and efficiency. Modern bending machines use advanced CNC technology to achieve high-precision and high-efficiency bending processing.

[0003] With the continuous development of industrial automation, CNC bending machines are more and more widely used in the field of metal processing, and the automatic tool changer used on CNC bending machines has gradually become an important equipment to improve production efficiency and processing accuracy.

[0004] In traditional bending machine operation, tool replacement is usually done manually. The traditional tool change method can no longer meet the working requirements of the bending machine. The traditional tool change method has the following disadvantages: 1. Traditional manual tool changing requires stopping the machine for operation. Manual selection and replacement of tools require workers to have certain experience and skills. It is often difficult to ensure the high-precision processing results of the bending machine, and the operation process is relatively complicated and time-consuming, which consumes a lot of time.

[0005] 2. The traditional manual tool changing method, manual selection and replacement of tools can usually only adapt to workpieces of specific sizes and shapes. In order to select the appropriate press tool, workers need to frequently select and replace tools, which is labor-intensive and has high safety risks, such as misoperation, tool falling, etc.

[0006] 3. The existing bending machine tool changer is usually fixedly installed inside the bending machine, and the tool is changed by horizontal translation. It cannot perform more flexible movements, and the operating accuracy and efficiency are insufficient, and it is impossible to quickly replace the appropriate upper pressing tool. Summary of the invention

[0007] The purpose of the present invention is to solve the above problems and to propose an improved automatic tool changer for a CNC bending machine.

[0008] In order to achieve the above purpose, the following technical solutions are adopted: An improved automatic tool changer for a CNC bending machine comprises a transmission device and a tool changer, wherein the transmission device comprises a first servo motor, a first slide rail and a transmission rod, and the transmission device is installed on the CNC bending machine. The tool changer comprises a main body, a screw guide rail mechanism, a connecting assembly, a base, a tool shifting rod and a sensor assembly, wherein the main body is installed on the first slide rail, the main body is provided with a first slider, a first groove and a second slide rail, the screw guide rail mechanism is installed in the first groove, the connecting assembly comprises a connecting member and a structural member, the connecting member is provided with a second slider, the connecting member is respectively connected to the main body and the screw guide rail mechanism, the structural member is located behind the connecting member, a cylinder is provided on the base, the transmission member is installed on the cylinder, the third slide rail is provided below the base, the base is installed at the bottom of the connecting assembly, the tool shifting rod is provided with a third slider, the tool shifting rod is respectively connected to the base and the transmission member, and the sensor assembly is installed on the side of the connecting member.

[0009] Preferably, the first servo motor is connected to the transmission rod via a transmission belt, the transmission rod is connected to the main body, and the first slide rail and the first servo motor are installed on the CNC bending machine.

[0010] Preferably, the first slider is installed on the front side of the main body, the slide groove of the first slider matches the first slide rail, the first groove is arranged on the back side of the main body, two protrusions are arranged in the first groove, a plurality of first threaded holes are arranged on the protrusions, and the second slide rail is arranged on both sides of the first groove.

[0011] Preferably, the screw guide mechanism includes a second servo motor, a connecting block, a screw guide and a fixed block, the second servo motor is located at the top of the connecting block, the screw guide is installed at the bottom of the connecting block, the second servo motor passes through the connecting block and is connected to the screw guide, the fixed block is located at the end of the screw guide, the connecting block is arch-shaped, a plurality of first circular holes are provided on the connecting block, the first circular holes match the first threaded holes, and the connecting block is connected to the protrusion.

[0012] Preferably, the second slider is arranged on the front side of the connecting member, the slide groove of the second slider matches the second slide rail, the connecting member is provided with a plurality of second threaded holes, and the second threaded holes match the fixing block. The structural member is installed at the rear side of the connecting member.

[0013] Preferably, a first notch is provided at the lower right side of the connecting piece, the size of which matches that of the cylinder, a plurality of second circular holes are provided at the bottom of the side of the connecting piece, and the two sides of the connecting piece are lower than the middle.

[0014] Preferably, a second groove is provided at the right end of the base, a plurality of third threaded holes are provided at the right end of the base, the size of the base matches the bottom of the connecting piece, a plurality of second threaded holes are provided on both sides of the base, the second threaded holes match the second circular holes, and a third slide rail is provided at the bottom of the right end of the base.

[0015] Preferably, the cylinder is located above the right end of the base, and angle codes are respectively provided at the front and rear of the cylinder, one side of the angle code is installed on the cylinder, and the other side is installed on the third threaded hole, two air inlets are provided on the side of the cylinder, the transmission member is connected to the cylinder through a nut, and a third circular hole is provided on the transmission member.

[0016] Preferably, a mounting groove is provided on the knife shifting rod, the third slider is located in the mounting groove, the sliding groove of the third slider matches the third sliding rail, the rod head of the knife shifting rod is L-shaped, and a fourth threaded hole is provided on the side of the knife shifting rod, and the fourth threaded hole matches the third circular hole.

[0017] Among them, the rod head of the knife shift rod is designed to be L-shaped, which can transmit power more effectively. The L-shaped design can reduce the dispersion and loss of force, increase the force-bearing area of ​​the knife shift rod, and improve the working efficiency of the knife shifter. The knife shift rod is connected to the cylinder through a transmission part, which increases the flexibility of the knife shift rod and improves the knife shifting efficiency.

[0018] Preferably, the sensor assembly includes the support member and the sensor. The support member is curved, one end of the support member is connected to the connecting member, and the sensor is mounted on the other end.

[0019] Among them, the bent support rod makes the sensor face the identification area of ​​the upper pressing knife, which can identify the position and number of the upper pressing knives more quickly and accurately, thereby improving the scanning efficiency of the tool changer.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows: the automatic tool changer, through a high-precision control system and sensor, is matched with a servo motor, a small cylinder and several groups of slide rails. It can accurately position the tool and automatically select the appropriate number of upper pressing knives according to the pre-input workpiece size, and move the upper pressing knives to the middle working area, which not only improves the processing accuracy, but also reduces the operation difficulty and time cost of the workers; the automatic tool changer uses the slide rail to change the position and move the required upper pressing knives to the working area. The whole operation process reduces the direct contact between the workers and the bending machine, reduces the labor intensity of the workers, improves the working environment, and reduces the safety risks; the automatic tool changer cooperates with the screw guide rail mechanism, the cylinder and several slide rails to realize the flexible movement of the automatic tool changer in the working area of ​​the bending machine, improves the flexibility of the automatic bending machine, and can cooperate with the sensor to quickly identify the number of upper pressing knives and locate the position of the upper pressing knives, thereby realizing rapid tool change. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic structural diagram of an improved automatic tool changer for a CNC bending machine according to Embodiment 1 of the present invention; Figure 2 This is a schematic diagram of a tool changer of an improved automatic tool changer for a CNC bending machine according to Embodiment 1 of the present invention; Figure 3 This is a schematic diagram of the screw guide mechanism of the improved automatic tool changer for a CNC bending machine according to Embodiment 1 of the present invention; Figure 4 This is a schematic diagram of the connection components of the improved automatic tool changer for a CNC bending machine according to Example 1 of the present invention; Figure 5 This is a schematic diagram of the base of the improved automatic tool changer for a CNC bending machine according to Embodiment 1 of the present invention; Figure 6 This is a schematic diagram of the cylinder of the improved automatic tool changer for the CNC bending machine according to Embodiment 1 of the present invention; Figure 7 This is a schematic diagram of the transmission parts of the improved automatic tool changer for a CNC bending machine according to Embodiment 1 of the present invention; Figure 8 This is a schematic diagram of a tool shifting rod of an improved automatic tool changer for a CNC bending machine according to Embodiment 1 of the present invention; Fig. 9 This is a schematic diagram of step 1 of the improved automatic tool changer for a CNC bending machine according to embodiment 1 of the present invention; Fig.10 This is a schematic diagram of step 2 of the improved automatic tool changer for a CNC bending machine according to embodiment 1 of the present invention; Fig.11 This is a schematic diagram of step 3 of the improved automatic tool changer for a CNC bending machine according to embodiment 1 of the present invention; DETAILED DESCRIPTION

[0022] Hereinafter, the improved automatic tool changer for a CNC bending machine of the present invention will be described in detail with reference to the accompanying drawings.

[0023] like Figure 1 As shown, the improved automatic tool changer of the CNC bending machine includes a transmission device 1 and a tool changer 2. The transmission device 1 includes a first servo motor 11, a first slide rail 12 and a transmission rod 13. The first servo motor 11, the first slide rail 12 and the transmission rod 13 are installed on the bending machine, and the tool changer 2 is installed on the first slide rail 12. The first servo motor 11 and the first slide rail 12 can enable the automatic tool changer to move horizontally on the bending machine, and cooperate with the sensor to find the upper pressure knife in a suitable position.

[0024] like Figure 2 The tool changer 2 shown includes a main body 3, a screw guide rail mechanism 4, a connecting assembly 5, a base 6, a tool shifting rod 7 and a sensor assembly 8. A plurality of first sliders 31 are installed on the front of the main body 3, and the slide groove of the first slider 31 matches the first slide rail 12. A first groove 32 is arranged on the back of the main body 3, and two protrusions 33 are arranged on the upper part of the first groove 32. A plurality of first threaded holes 34 are arranged on the protrusion 33. A second slide rail 35 is arranged on the back of the main body 3.

[0025] like Figure 3 As shown, the screw guide mechanism 4 is installed on the back of the main body 3, and the connecting component 5 is also installed on the back of the main body 3 and connected to the screw guide mechanism 4. The screw guide mechanism 4 includes a second servo motor 41, a connecting block 42, a screw guide 43 and a fixing block 44. The second servo motor 41 passes through the connecting block 42 and is connected to the screw guide 43. The end of the screw guide 43 is provided with a fixing block 44 in the vertical direction. The connecting block 42 is arch-shaped, and a plurality of first circular holes 421 are provided on the connecting block 42. The first circular holes 421 match the first threaded holes 34. The connecting block 42 is installed on the protrusion 33 in the first groove 32 by screws. The vertical movement of the automatic tool changer is controlled by the second servo motor 41 and the screw guide 43.

[0026] like Figure 4As shown, the connecting component 5 includes a connecting member 51 and a structural member 52. A plurality of second sliders 511 are provided on the front of the connecting member 51. The slide groove of the second slider 511 matches the second slide rail 35. A plurality of second threaded holes 512 are provided on the connecting member 51. The second threaded holes 512 match the fixing block 44. The structural member 52 is installed on the lower side of the back of the connecting member 51. A first notch 513 is provided at the lower left of the connecting member 51. A plurality of second circular holes 514 are provided at the bottom of the side of the connecting member 51. The two sides of the connecting member 51 are lower than the middle part, and the left part is lower than the right part. The sensor component 8 is installed on the left side of the connecting component 5. The sensor component 8 includes a support member 81 and a sensor 82. The sensor 82 is installed at the lower end of the support member 81, and the support rod 81 is curved.

[0027] like Figure 5 , Figure 6 , Figure 7 As shown, the base 6 is installed at the bottom of the connecting component 5, the left part of the base 6 is concave, the right part of the base 6 is convex, and the front end of the right part is provided with a second groove 61, and the right part of the base 6 is provided with a plurality of third threaded holes 62. The shape of the base 6 matches the bottom of the connecting member 5, and the side of the base 6 is provided with a second threaded hole 63, and the second circular hole 514 matches the second threaded hole 63. The connecting member 51 is connected to the base 6 by screws, and a third slide rail 64 is provided at the lower right part of the base 6. A cylinder 65 is installed on the right part, and angle codes 651 are respectively provided at the front and rear ends of the cylinder 65. One side of the angle code 651 is installed on the cylinder 65, and the other side is installed on the third threaded hole 62. A transmission member 66 is installed on the piston rod of the cylinder 65, and a third circular hole 67 is provided on the transmission member 66. The size of the cylinder 65 matches the first notch 513. Two air inlets 652 are provided on the side of the cylinder 65. The cylinder 65 can control the knife lever 7 to insert into the groove of the upper pressing knife, thereby driving the upper pressing knife to move.

[0028] like Figure 8 As shown, the knife shifting rod 7 is installed at the bottom left side of the base 6, and a mounting groove 71 is provided on the knife shifting rod 7. A plurality of third sliders 72 are installed in the mounting groove 71. The sliding groove of the third slider 72 matches the third slide rail 64. The rod head of the knife shifting rod 7 is L-shaped. A fourth threaded hole 73 is provided on the side of the knife shifting rod 7. The fourth threaded hole 73 matches the third circular hole 67. The transmission member 66 is installed on the knife shifting rod 7 by screws.

[0029] In this embodiment, Fig. 9 , Fig.10 , Fig.11As shown, the worker inputs the specific parameters of the workpiece to be bent into the control system of the bending machine, and the automatic tool changer starts to work. Step 1: The automatic tool changer starts to move horizontally along the first slide rail 12 according to the pre-input program instructions, and the sensor 82 enters the real-time monitoring state. By comparing the pre-input parameters with the information fed back by the sensor 82, the automatic tool changer continues to move; Step 2: When the tool changer 2 moves to the corresponding upper press knife position, the screw guide mechanism 4 controls the connecting assembly 5 to move downward. After moving to the appropriate position, the cylinder 65 starts to work, moving the transmission member 67 and the tool shifting rod 7 forward, and the tool shifting rod 7 is inserted into the groove at the upper end of the upper press knife; Step 3: Then the tool changer 2 of the automatic tool changer starts to move toward the working area, and the tool shifting rod 7 pushes the upper press knife to move until the upper press knife is in the working area, thereby realizing the tool changing process of the bending machine, and then the bending machine starts bending work.

[0030] The above description is only a preferred example of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have other optimization schemes and additional functions. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

[0031] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "include... ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

Claims

1. Improved automatic tool changer for CNC bending machine, characterized by: The invention comprises a transmission device (1) and a tool changer (2), wherein the transmission device (1) comprises a first servo motor (11), a first slide rail (12) and a transmission rod (13), the transmission device (1) is installed on a CNC bending machine, the tool changer (2) comprises a main body (3), a screw guide rail mechanism (4), a connecting assembly (5), a base (6), a tool shifting rod (7) and a sensor assembly (8), the main body (3) is connected to the transmission device (1), the main body (3) is provided with a first slider (31), a first groove (32) and a second slide rail (35), the screw guide rail mechanism (4) is installed in the first groove (32), and the connecting assembly (5) comprises a connecting member (51), a structural member (52) The connecting member (51) is provided with a second slider (511), the connecting member (51) is respectively connected to the main body (3) and the screw guide rail mechanism (4), the structural member (52) is located behind the connecting member (51), the base (6) is provided with a cylinder (65), the cylinder (65) is provided with the transmission member (66), the lower part of the base (6) is provided with the third slide rail (64), the base (6) is installed at the bottom of the connecting assembly (5), the knife shifting rod (7) is provided with a third slider (72), the knife shifting rod (7) is respectively connected to the base (6) and the transmission member (66), and the sensor assembly (8) is installed on the side of the connecting member (51).

2. The improved automatic tool changer for CNC bending machine according to claim 1, characterized in that: The first servo motor (11) is connected to the transmission rod (13) via a transmission belt, the transmission rod (13) is connected to the main body (3), and the first slide rail (12) and the first servo motor (11) are installed on a CNC bending machine.

3. The improved automatic tool changer for CNC bending machine according to claim 1, characterized in that: The first sliding block (31) is mounted on the front side of the main body (3); the sliding groove of the first sliding block (31) matches the first sliding rail (12); the first groove (32) is arranged on the back side of the main body (3); two protrusions (33) are arranged in the first groove (32); a plurality of first threaded holes (34) are arranged on the protrusions (33); and the second sliding rails (35) are arranged on both sides of the first groove (32).

4. The improved automatic tool changer for CNC bending machine according to claim 1, characterized in that: The screw guide rail mechanism (4) comprises a second servo motor (41), a connecting block (42), a screw guide rail (43) and a fixing block (44); the second servo motor (41) is located at the top of the connecting block (42); the screw guide rail (43) is installed at the bottom of the connecting block (42); the second servo motor (41) passes through the connecting block (42) and is connected to the screw guide rail (43); the fixing block (44) is located at the end of the screw guide rail (43); the connecting block (42) is in an arch shape; a plurality of first circular holes (421) are provided on the connecting block (42); the first circular holes (421) match the first threaded holes (34); and the connecting block (42) is connected to the protrusion (33).

5. The improved automatic tool changer for CNC bending machine according to claim 1, characterized in that: The second sliding block (511) is arranged on the front side of the connecting member (51); the sliding groove of the second sliding block (511) matches the second sliding rail (35); a plurality of second threaded holes (512) are provided on the connecting member (51); the second threaded holes (512) match the fixing block (44); and the structural member (52) is installed at the rear side of the connecting member (51).

6. The improved automatic tool changer for CNC bending machine as claimed in claim 5, characterized in that: A first notch (513) is provided at the lower right side of the connecting piece (51), the size of the first notch (513) matching that of the cylinder (65), a plurality of second circular holes (514) are provided at the bottom of the side surface of the connecting piece (51), and the two sides of the connecting piece (51) are lower than the middle.

7. The improved automatic tool changer for CNC bending machine as claimed in claim 1, characterized in that: A second groove (61) is provided at the right end of the base (6), a plurality of third threaded holes (62) are provided at the right end of the base (6), the size of the base (6) matches the bottom of the connecting member (51), a plurality of second threaded holes (63) are provided on both sides of the base (6), the second threaded holes (63) match the second circular holes (514), and a third slide rail (64) is provided at the bottom of the right end of the base (6).

8. The improved automatic tool changer for a CNC bending machine as claimed in claim 7, characterized in that: The cylinder (65) is located above the right end of the base (6). Angle brackets (651) are respectively provided at the front and rear of the cylinder (65). One side of the angle bracket (651) is mounted on the cylinder (65), and the other side is mounted on the third threaded hole (62). Two air inlets (652) are provided on the side of the cylinder (65). The transmission member (66) is connected to the cylinder (65) via a nut. The transmission member (66) is provided with a third circular hole (67).

9. The improved automatic tool changer for CNC bending machine as claimed in claim 1, characterized in that: The knife shifting rod (7) is provided with a mounting groove (71), the third sliding block (72) is located in the mounting groove (71), the sliding groove of the third sliding block (72) matches the third sliding rail (64), the rod head of the knife shifting rod (7) is L-shaped, and the side surface of the knife shifting rod (7) is provided with a fourth threaded hole (73), and the fourth threaded hole (73) matches the third circular hole (67).

10. The improved automatic tool changer for a CNC bending machine as claimed in claim 1, characterized in that: The sensor assembly (8) comprises the support member (81) and a sensor (82); the support member (81) is curved; one end of the support member (81) is connected to the connecting member (51); and the other end is provided with the sensor (82).

Images