Crank blank bending device

Abstract

The utility model discloses a crank blank bending device which comprises an operation platform, and a pipe pressurization conveying module, an electromagnetic heating coil and a hydraulic index plate are arranged on the operation platform. A pipe cutting unit is arranged between the pipe pressurization conveying module and the electromagnetic heating coil, and a pipe clamp is arranged between the electromagnetic heating coil and the hydraulic index plate. The pipe clamp comprises a first clamping block fixedly arranged on the working platform and a second clamping block capable of moving towards the first clamping block, and an arc-shaped groove capable of being formed in the periphery of a blank in a surrounding mode is formed in the side, opposite to the second clamping block, of the first clamping block. The hydraulic index plate is provided with two bending rollers which are symmetrically arranged along the central axis of the arc-shaped groove, and the rotating shaft of one bending roller coincides with the rotating shaft of the hydraulic index plate; according to the crank blank bending device, the cutting, heating and bending processes of blanks can be continuously achieved, excessive manual intervention is not needed in the whole process, and the working efficiency is high.

Description

Technical Field

[0001] The utility model belongs to the technical field of forging processing, and particularly relates to a bending device for crank blanks. Background Art

[0002] When processing the crank for a lawn mower, in order to ensure the strength of the part and the streamline direction of forging forming, the crank product needs to be forged integrally during forging. Due to this requirement, the center distance between the head and the rod of the die is relatively large, and the head is prone to insufficient filling and folding during forging, resulting in poor product quality. Therefore, before forging the crank product, it is necessary to bend the blank so that the blank can be evenly filled in the forging die. The traditional crank bending process requires manual operation of multiple processes such as cutting, heating, and bending of the crank blank respectively, with low efficiency and difficult to meet the large-scale production requirements. Summary of the Utility Model

[0003] The purpose of the utility model is to overcome the deficiencies in the prior art and provide a bending device for crank blanks, which can continuously realize the processes of cutting, heating, and bending of the blank, without too much manual intervention in the whole process and with high working efficiency.

[0004] To achieve the above purpose, the technical solution adopted by the utility model is: a bending device for crank blanks, including an operation platform, on which a pipe pressurizing and conveying module, an electromagnetic heating coil, and a hydraulic indexing plate are sequentially arranged;

[0005] Wherein, a pipe cutting unit suspended above the operation platform is arranged between the pipe pressurizing and conveying module and the electromagnetic heating coil, and a pipe clamp is arranged between the electromagnetic heating coil and the hydraulic indexing plate;

[0006] The pipe pressurizing and conveying module can drive the blank to pass through the electromagnetic heating coil along a first direction, and the pipe cutting unit can horizontally move along a second direction, and the first direction is perpendicular to the second direction;

[0007] The pipe clamp includes a first clamping block fixedly arranged on the operation platform, and a second clamping block capable of moving towards the first clamping block along the second direction. An arc groove capable of surrounding the outer circumference of the blank is arranged on the opposite side of the first clamping block and the second clamping block;

[0008] Two bending rollers symmetrically arranged about the center of the arc groove are arranged on the hydraulic indexing plate, and the rotation axis of one of the bending rollers coincides with the rotation axis of the hydraulic indexing plate.

[0009] Optionally, the pipe pressurized conveying module includes a number of bases arranged on the working platform. Each group of bases is provided with two oppositely arranged mounting plates, and a first conveying roller and a second conveying roller are arranged vertically between the two mounting plates;

[0010] The first conveying roller can support the lower part of the blank vertically, the second conveying roller can press the upper part of the blank vertically, and a servo drive unit capable of driving the first conveying roller or the second conveying roller to rotate is arranged below the working platform.

[0011] Optionally, U-shaped grooves are arranged on the mounting plates. Bearings capable of sliding and being embedded in the U-shaped grooves are respectively arranged at both ends of the second conveying roller. A support seat is arranged at the top of the two mounting plates. A top column capable of abutting against the bearings is movably penetrated through the support seat, and a support spring capable of elastically abutting against the support seat is sleeved on the outer periphery of the top column.

[0012] Optionally, annular grooves with an arc-shaped cross-section are arranged on the outer peripheries of the first conveying roller, the second conveying roller, and the bending roller.

[0013] Optionally, a number of limiting blocks capable of clamping the outer periphery of the blank along the second direction are arranged between the pipe pressurized conveying module and the electromagnetic heating coil and between the heating coil and the pipe fixture.

[0014] Optionally, a gantry is arranged on the working platform, a servo sliding table is arranged on the gantry along the second direction, and the servo sliding table can drive the cutting unit to move along the second direction.

[0015] Optionally, the cutting unit is a water cutting knife.

[0016] Optionally, the second clamping block is driven by a hydraulic cylinder.

[0017] Compared with the prior art, the beneficial effects achieved by the present utility model are as follows: By integrating a pipe pressurized conveying module for conveying the blank, an electromagnetic heating coil for heating the blank, a pipe cutting unit for cutting the blank, and a hydraulic indexing table capable of bending the blank on the working platform, the cutting, heating, and bending processes of the blank can be continuously realized under the push of the pipe pressurized conveying module. The whole process requires little manual intervention and has high working efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present utility model will be further described below with reference to the drawings and embodiments.

[0019] Figure 1 is a schematic structural diagram of a crank blank bending device in a preferred embodiment of the present utility model;

[0020] Figure 2 It is a left - view structural schematic diagram of the crank blank bending device in the preferred embodiment of the present utility model;

[0021] Figure 3 It is a right - view structural schematic diagram of the crank blank bending device in the preferred embodiment of the present utility model;

[0022] Figure 4 It is a structural schematic diagram of the pipe pressurized conveying module in the preferred embodiment of the present utility model;

[0023] Figure 5 It is a sectional structural schematic diagram of the pipe pressurized conveying module in the preferred embodiment of the present utility model;

[0024] Figure 6 It is a structural schematic diagram of the first clamping block, the second clamping block and the hydraulic cylinder in the preferred embodiment of the present utility model;

[0025] Among them, 1. working platform; 2. electromagnetic heating coil; 3. hydraulic indexing table; 4. first clamping block; 5. second clamping block; 6. bending roller; 7. base; 8. mounting plate; 801. U - shaped groove; 9. first conveying roller; 10. second conveying roller; 11. bearing; 12. support seat; 13. ejector pin; 14. support spring; 15. limit block; 16. gantry; 17. servo slide; 18. water - cutting knife; 19. hydraulic cylinder; 101. arc - shaped groove; 102. annular groove. Detailed implementation manners

[0026] Now, the present utility model will be further described in detail with reference to the drawings and embodiments. These drawings are all simplified schematic diagrams, only illustrating the basic structure of the present utility model in a schematic way, so they only show the components related to the present utility model.

[0027] It should be noted that if there are directional indications (such as up, down, bottom, top, etc.) involved in this embodiment, the directional indications are only used to explain the relative positional relationship and movement conditions between components in a specific posture. If the specific posture changes, the directional indications will also change accordingly. The terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. Unless otherwise clearly specified and defined, the terms "set", "connected", and "connected to" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] As Figures 1-6 shown, a crank blank bending device includes an operation platform 1, on which a pipe pressurizing and conveying module, an electromagnetic heating coil 2, and a hydraulic indexing table 3 are sequentially arranged; wherein, a pipe cutting unit suspended above the operation platform 1 is arranged between the pipe pressurizing and conveying module and the electromagnetic heating coil, and a pipe clamp is arranged between the electromagnetic heating coil 2 and the hydraulic indexing table 3; the pipe pressurizing and conveying module can drive the blank to pass through the electromagnetic heating coil 2 along a first direction, the pipe cutting unit can move horizontally along a second direction, and the first direction is perpendicular to the second direction; the pipe clamp includes a first clamping block 4 fixedly arranged on the operation platform 1 and a second clamping block 5 capable of moving towards the first clamping block 4 along the second direction. An arc groove 101 capable of surrounding the blank is arranged on the side of the first clamping block 4 opposite to the second clamping block 5; two bending rollers 6 symmetrically arranged about the center axis of the arc groove 101 are arranged on the hydraulic indexing table 3, and the rotation axis of one of the bending rollers 6 coincides with the rotation axis of the hydraulic indexing table 3.

[0029] Specifically, the pipe pressurized conveying module can convey the blank for forging towards the electromagnetic heating coil 2, enabling the blank to pass through the electromagnetic heating coil 2. After the electromagnetic heating coil 2 is powered on, it can heat the blank. At the same time, after one end of the blank penetrates into the electromagnetic heating coil 2 for a certain distance, the pipe cutting unit can cut the blank, so that the blank penetrating into the electromagnetic heating coil 2 is cut into separate small segments; then the pipe heating and conveying module continues to convey the blank towards the electromagnetic heating coil 2, and pushes the separate small segment of the blank to between the first clamping block 4 and the second clamping block 5 and between the two bending rollers 6. Subsequently, the second clamping block 5 moves towards the first clamping block 4, and the position of the blank can be positioned and fixed by the arc-shaped grooves 101 on the first clamping block 4 and the second clamping block 5. Then, the hydraulic indexing table 3 rotates. At the same time, since the bending rollers 6 are rotationally connected to the hydraulic indexing table 3, under the action of the two bending rollers 6, this section of the blank can be bent into the angle required for forging; during this period, the heating coil can heat the other section of the blank that has not been cut off, and at the same time, the pipe cutting unit will cut this section. Through the crank blank bending device in this technical solution, the cutting, heating and bending processes of the blank can be continuously realized, without excessive manual intervention and with high work efficiency.

[0030] As described above, the electromagnetic heating coil 2 is a prior art, and is electromagnetically connected to an electromagnetic heating controller, a power supply, etc., and can efficiently and stably heat the blank. The hydraulic indexing table 3 is a mechanical processing tool in the prior art and can meet the bending requirements of the blank.

[0031] Furthermore, the first direction and the second direction in this technical solution correspond to the X-axis and the Y-axis in the spatial rectangular coordinate system, that is, the first direction includes the positive and negative directions of the X-axis, the second direction includes the positive and negative directions of the Y-axis, and the positional relationship between the first direction and the second direction includes but is not limited to being on the same horizontal plane.

[0032] As described above, such as Figure 4 、 Figure 5As shown, the pipe pressurized conveying module includes several groups of bases 7 arranged on the working platform 1, and each group of bases 7 is provided with two relatively arranged mounting plates 8, and a first conveying roller 9 and a second conveying roller 10 are arranged between the two mounting plates 8 in the vertical direction; the first conveying roller 9 can be supported on the lower part of the blank in the vertical direction, and the second conveying roller 10 can be pressed down on the upper part of the blank in the vertical direction, and a servo drive unit capable of driving the first conveying roller 9 or the second conveying roller 10 to rotate is provided under the working platform 1. Preferably, the servo drive unit in the present technical solution can drive the first conveying roller 9 to rotate, and the first conveying roller 9 can drive the blank to move toward the electromagnetic heating coil 2, while the second conveying roller 10 presses down on the blank, which can effectively prevent the blank from shaking during the conveying process, so that the blank can accurately pass through the electromagnetic heating coil 2, and at the same time, the cut blank can be pushed to the top of the cut blank.

[0033] The servo drive unit in the aforementioned technical solution is a servo motor known in the art. Specifically, a first pulley or first gear is provided on the output shaft of the servo motor, and a second pulley or second gear is provided on the rotational shaft of the first conveyor roller 9. A toothed belt or chain can be used to transmit power between the servo motor and the first conveyor roller 9. Furthermore, since the pipe pressurized conveying module includes multiple sets of first conveyor rollers 9 and second conveyor rollers 10, to reduce energy loss, the multiple sets of first conveyor rollers 9 can be synchronously linked via a chain drive or belt drive, allowing a single servo motor to drive the multiple sets of first conveyor rollers 9 to rotate synchronously.

[0034] The above, such as Figure 4 、 Figure 5 As shown, to enable the pipe pressurized conveying module to be suitable for conveying billets of various specifications, a U-shaped groove 801 is provided on the mounting plate 8. Bearings 11 that can be slidably embedded in the U-shaped groove 801 are respectively provided at both ends of the second conveying roller 10. Support seats 12 are provided on the tops of the two mounting plates 8. A top column 13 that can movably rest on the support seat 12 is provided. The outer periphery of the top column 13 is provided with a support spring 14 that can elastically rest against the support seat 12. The second conveying roller 10 is floatingly mounted on the mounting plate 8 via the support spring 14. The support spring 14 can apply a vertical downward force to the second conveying roller 10 through the top column 13 and the bearing 11, so that the second conveying roller 10 can press down on billets of different specifications.

[0035] Further, such as Figures 2-5As shown in the figure, the outer circumferences of the first conveying roller 9, the second conveying roller 10, and the bending roller 6 are all provided with annular grooves 102 having an arc-shaped cross-section. The annular grooves 102 on the first conveying roller 9 and the second conveying roller 10 can prevent the moving direction of the blank from deviating during the process of conveying the blank; in this technical solution, the annular groove 102 on the bending roller 6 can fit on the outer circumference of the blank to prevent the blank from moving up and down relative to the annular groove 102 on the bending roller 6, which is convenient for improving the accuracy during the process of bending the blank.

[0036] Furthermore, as Figure 1 shown, between the pipe pressurized conveying module and the electromagnetic heating coil 2, and between the heating coil and the pipe fixture, several groups of limiting blocks 15 capable of clamping on the outer circumference of the blank along the second direction are provided. The limiting blocks 15 do not completely contact the outer circumference of the blank and are only used to limit the moving trajectory of the blank, so that the entire blank and the cut-off blank can move along a fixed trajectory to prevent the occurrence of material jamming.

[0037] In this technical solution, a gantry 16 is provided on the working platform 1. A servo slide 17 is arranged on the gantry 16 along the second direction. The servo slide 17 can drive the cutting unit to move along the second direction. The servo slide 17 is a prior art and can precisely control the moving direction and moving distance of the cutting unit.

[0038] Meanwhile, preferably, in this technical solution, the cutting unit is a water cutting knife 18, which is a high-pressure water jet cutting technology in the prior art. It has high cutting efficiency and high cutting precision and can continuously and efficiently complete the cutting operation of the blank.

[0039] Furthermore, the second clamping block 5 is driven by a hydraulic cylinder 19. To prevent the second clamping block 5 from flipping during the process of moving towards the first clamping block 4, a fixed seat is provided on the working platform 1. At least one set of guide shafts is movably penetrated through the fixed seat. The guide shafts are parallel to the piston rod of the hydraulic cylinder, and one end of the guide rod is connected to the second clamping block 5.

[0040] Working principle: The servo drive unit can drive the first conveying roller 9 to rotate. The first conveying roller 9 can drive the blank to move towards the electromagnetic heating coil 2. At the same time, the second conveying roller 10 elastically presses down on the blank, which can effectively prevent the blank from shaking during the conveying process, so that the blank can accurately pass through the electromagnetic heating coil 2. After the electromagnetic heating coil 2 is powered on, it can heat the blank. At the same time, the pipe cutting unit can cut the blank, so that the blank passing through the electromagnetic heating coil 2 is cut into separate small segments; then the pipe heating and conveying module continues to convey the blank towards the electromagnetic heating coil 2, and the separate small segment of the blank is pushed between the first clamping block 4 and the second clamping block 5 and between the two bending rollers 6. Subsequently, the hydraulic cylinder 19 drives the second clamping block 5 to move towards the first clamping block 4, and the position of the blank can be positioned and fixed by the arc-shaped grooves 101 on the first clamping block 4 and the second clamping block 5. Then the hydraulic indexing table 3 rotates. At the same time, since the bending rollers 6 are rotatably connected to the hydraulic indexing table 3, under the action of the two bending rollers 6, this section of the blank can be bent into the angle required for forging; during this period, the heating coil can heat the other section of the blank that has not been cut off, and at the same time, the pipe cutting unit will cut this section. Through the crank blank bending device in this technical solution, the cutting, heating and bending processes of the blank can be continuously realized, without too much manual intervention, and the working efficiency is relatively high.

[0041] Based on the ideal embodiments of the present invention as an inspiration, through the above description, relevant personnel can completely make various changes and modifications within the scope without departing from the technical idea of this invention. The technical scope of this invention is not limited to the content in the specification, and the technical scope must be determined according to the scope of the claims.

Claims

1. A crank blank bending device, comprising an operation platform (1), characterized in that: A pipe pressurized conveying module, an electromagnetic heating coil (2), and a hydraulic indexing table (3) are successively arranged on the operation platform (1); Among them, a pipe cutting unit suspended above the operation platform (1) is arranged between the pipe pressurized conveying module and the electromagnetic heating coil, and a pipe clamp is arranged between the electromagnetic heating coil (2) and the hydraulic indexing table (3); The pipe pressurized conveying module can drive a blank to pass through the electromagnetic heating coil (2) along a first direction, and the pipe cutting unit can horizontally move along a second direction, and the first direction is perpendicular to the second direction; The pipe clamp includes a first clamping block (4) fixedly arranged on the operation platform (1), and a second clamping block (5) capable of moving towards the first clamping block (4) along the second direction. An arc-shaped groove (101) capable of surrounding the outer periphery of the blank is arranged on one side of the first clamping block (4) opposite to the second clamping block (5); Two bending rollers (6) symmetrically arranged about the center axis of the arc-shaped groove (101) are arranged on the hydraulic indexing table (3), and the rotation axis of one of the bending rollers (6) coincides with the rotation axis of the hydraulic indexing table (3).

2. The crank blank bending device according to claim 1, wherein: The pipe pressurized conveying module includes several groups of bases (7) arranged on the operation platform (1). Two relatively arranged mounting plates (8) are arranged on each group of bases (7), and a first conveying roller (9) and a second conveying roller (10) are arranged between the two mounting plates (8) in the vertical direction; The first conveying roller (9) can vertically support the lower part of the blank, the second conveying roller (10) can vertically press the upper part of the blank, and a servo drive unit capable of driving the first conveying roller (9) or the second conveying roller (10) to rotate is arranged below the operation platform (1).

3. The crank blank bending device according to claim 2, characterized in that: A U-shaped groove (801) is arranged on the mounting plate (8). Bearings (11) capable of sliding and being embedded in the U-shaped groove (801) are respectively arranged at both ends of the second conveying roller (10). A support seat (12) is arranged at the top of the two mounting plates (8). A top column (13) capable of abutting against the bearing (11) is movably penetrated through the support seat (12), and a support spring (14) capable of elastically abutting against the support seat (12) is sleeved on the outer periphery of the top column (13).

4. The crank blank bending device according to claim 2, characterized in that: Circular grooves (102) with an arc-shaped cross section are arranged on the outer peripheries of the first conveying roller (9), the second conveying roller (10), and the bending roller (6).

5. The crank blank bending device according to claim 1, characterized in that: Several groups of limiting blocks (15) capable of clamping the outer periphery of the blank along the second direction are arranged between the pipe pressurized conveying module and the electromagnetic heating coil (2) and between the heating coil and the pipe clamp.

6. The crank blank bending device according to claim 1, wherein: A gantry (16) is arranged on the operation platform (1), a servo slide (17) is arranged on the gantry (16) along the second direction, and the servo slide (17) can drive the cutting unit to move along the second direction.

7. The crank blank bending device according to claim 1, wherein: The cutting unit is a water cutting knife (18).

8. The crank blank bending device according to claim 1, characterized in that: The second clamping block (5) is driven by a hydraulic cylinder (19).

Images