A chamfering machine

Abstract

The present invention relates to a chamfering machine, comprising a machine platform, a fixture, a chamfering mechanism and a propulsion mechanism, wherein the propulsion mechanism comprises an upper slider and a lower slider arranged on the machine platform, the upper slider can move up and down relative to the machine platform, is above the lower slider and presses on the lower slider, and the lower slider can move forward and backward relative to the machine platform, the fixture comprises an upper fixture, a lower fixture and a reset spring, the upper fixture is installed on the machine platform, the lower fixture is movably arranged on the upper fixture, the upper slider is below the lower fixture, the lower slider moves forward or backward to push the upper slider to move upward, the upper slider moves upward to push the lower fixture to move the upper fixture, so that the upper fixture and the lower fixture clamp the workpiece together, when the lower slider retreats, the upper slider moves downward, and the reset spring restores the upper fixture and the lower fixture to a non-clamped state. The present invention adopts a simple mechanical structure to clamp the workpiece, and automatically restores to a non-clamped state after the fixture thrust is withdrawn. The entire machine structure is very simple, easy to operate, low in cost and high in production efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of machining equipment, in particular to a chamfering machine. Background Art

[0002] Chamfering refers to the process of cutting the edges and corners of a workpiece into a certain slope. Chamfering is done to remove burrs on parts caused by machining and to facilitate assembly of parts. Generally, chamfers are made at the ends of parts. A chamfering machine generally clamps the workpiece with a fixture first, and then uses a chamfering mechanism to chamfer the workpiece. Different workpieces require different fixtures due to their different shapes and chamfered locations. For cylindrical workpieces, the chamfered area is at the end. Current chamfering machines usually use a very complex fixture to clamp the workpiece and a cylinder to drive the fixture. This makes the structure of this type of chamfering machine complex, bulky, and costly. In addition, the cylinder will make the machine full of oil, which will stick to the debris generated by the chamfering process, making it inconvenient to operate and clean, and the entire machine will become dirty. Summary of the Invention

[0003] In order to solve the above problems existing in the current chamfering machine, the present invention proposes a chamfering machine that uses a simple mechanical mechanism to clamp the workpiece, so as to simplify the structure, reduce costs, clean the processing environment, and improve production convenience and efficiency.

[0004] The lower slider is moved forwards and the lower slider is moved back and forth to move the upper slider upwards, so that the upper slider and the lower slider can be clamped together to clamp the workpiece, and when the lower slider retreats, the upper slider moves downwards, and the reset spring causes the upper and lower sliders to return to a non-clamped state.

[0005] The chamfering machine provided by the present invention adopts a propulsion mechanism with a simple mechanical structure to push the lower clamp to move toward the upper clamp to clamp the workpiece. The clamping of the workpiece is stable and reliable. The clamp automatically returns to a non-clamped state after the thrust of the propulsion mechanism is withdrawn, which is very convenient for loading and unloading the workpiece. The entire machine structure is very simple, easy to operate, low in cost and high in production efficiency.

[0006] Furthermore, the machine platform includes a vertical plate and a turntable rotatably mounted on the vertical plate. The two clamps are mounted on the turntable. When the turntable rotates 180 degrees, the two clamps swap positions, with the upper clamp positioned between the lower clamp and the turntable's rotation axis. While one clamp is clamping a workpiece for chamfering, the other clamp can be used for workpiece loading and unloading, resulting in high production efficiency.

[0007] Furthermore, the machine platform is equipped with a feed chute and a push rod. The turntable is on one side of the vertical plate, and the feed chute and push rod are on the other side of the vertical plate. The turntable has a first through-hole directly opposite the fixture, and the vertical plate has a second through-hole directly opposite the fixture. When one fixture is in a position to clamp a workpiece, the second through-hole directly faces the first through-hole directly opposite the other fixture. The push rod can move axially along the second through-hole, sequentially pushing the workpiece on the feed chute into the second through-hole, the first through-hole, and the fixture. This simple structure automatically completes workpiece loading, further improving production efficiency and simplifying the structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a structural diagram of the chamfering machine;

[0009] Figure 2 It is a structural diagram of another working state of the chamfering machine;

[0010] Figure 3 is a structural diagram of the fixture;

[0011] Figure 4 is a cross-sectional view of the fixture;

[0012] Figure 5 for Figure 2 A magnified view of part A;

[0013] Figure 6 is a cross-sectional view of the propulsion mechanism;

[0014] Figure 7 is a schematic diagram of the structure of the brake assembly;

[0015] Figure 8 This is a schematic structural diagram of the brake assembly from another perspective.

[0016] The present invention will be described in further detail below with reference to the accompanying drawings. DETAILED DESCRIPTION

[0017] See also Figure 1 and Figure 2 The chamfering machine includes a machine platform 1, a fixture, a propulsion mechanism and a chamfering mechanism. The machine platform 1 includes a vertical stand 11 and a turntable 12 arranged parallel to the stand 11. The turntable 12 can rotate on the stand 11 with its axis of rotation in the horizontal direction.

[0018] The fixture is set on the turntable 12 and is used to clamp the cylindrical workpiece (such as a bearing sleeve, etc.). Figure 3 and Figure 4 The fixture includes an upper fixture 21, a lower fixture 22, and a return spring 23. The upper fixture 21 is fixedly mounted on the turntable 12 with screws, and the lower fixture 22 is movably arranged on the upper fixture 21. Under the action of an external force, the lower fixture 22 can move up and down relative to the upper fixture 21. The upper fixture 21 has an arc-shaped upper clamping surface 210 on the surface opposite to the lower fixture 22, and the lower fixture 22 has an arc-shaped lower clamping surface 220 on the surface opposite to the upper fixture 21. When the lower fixture 22 is not subjected to an external force, the fixture is in a non-clamped state. In this state, the workpiece placed between the upper fixture 21 and the lower fixture 22 is not clamped, which is suitable for placing a workpiece that needs to be chamfered on the fixture, that is, loading the workpiece, or removing the chamfered workpiece from the fixture, that is, unloading the workpiece. When the lower clamp 22 is pushed upward by an external force, the lower clamp 22 overcomes the elastic force of the reset spring 23 and moves toward the upper clamp 21. The distance between the lower clamp 22 and the upper clamp 21 is shortened, and the upper clamping surface 210 and the lower clamping surface 220 contact the outer cylindrical surface of the workpiece, clamping the workpiece. At this time, the clamp is in a clamped state, in which the clamped workpiece can be chamfered. When the external force is removed, the clamp returns to a non-clamped state under the action of the reset spring 23. Figure 1 and Figure 2 In the process, the workpiece is placed in the fixture.

[0019] In this embodiment, two clamps are provided on the turntable 12. The two clamps are located in the same diameter direction of the turntable 12 and on either side of the rotation axis of the turntable 12. When the turntable rotates 180 degrees, the two clamps just swap positions. The clamps are located near the edge of the turntable 12. The lower clamp 22 is closer to the edge of the turntable 12 than the upper clamp 21. The upper clamp 21 is located between the lower clamp 22 and the rotation axis of the turntable. When the turntable 12 rotates, when one clamp is moved to the lowest position, the other clamp is moved to the highest position. Figure 1 In this position, the push mechanism pushes the lower fixture, making it clamped. It clamps a workpiece and can perform chamfering operations. The upper fixture is in the unclamped state. The chamfered workpiece can be removed first, and then another workpiece that needs chamfering can be placed on the fixture. Workpiece loading and unloading can be carried out simultaneously with chamfering, which improves production efficiency.

[0020] See also Figure 5 and Figure 6, the propulsion mechanism includes an upper slider 31, a lower slider 32 and a propulsion cylinder 33. A slide 10 is provided on the machine 1, and the lower slider 32 is placed in the slide 10, and can move forward and backward in the horizontal direction relative to the machine 1 along the slide 10. The propulsion cylinder 33 is installed on the machine 1, and its piston rod is connected to the lower slider 32, and the propulsion cylinder 33 drives the lower slider 32 to move. The upper slider 31 is set on the machine 1 and can move up and down relative to the machine 1. The upper slider 31 is above the lower slider 32 and presses on the lower slider 32. The contact surface between the two is an inclined surface forming an acute angle with the horizontal plane. Since the upper slider 31 can only move in the up and down direction, the lower slider 32 can only move in the front and back direction ( Figure 6 When the upper slider 31 moves (left and right), it pushes the upper slider 31 to rise or fall. In this embodiment, the lower slider 32 moves to the right, the upper slider 31 rises, the lower slider 32 moves to the left, and the upper slider 31 falls. By changing the inclination direction of the contact surface between the upper slider 31 and the lower slider 32, the lower slider 32 can move to the left, the upper slider 31 rises, the lower slider 32 moves to the right, and the upper slider 31 falls. The upper slider 31 rises, pressing against the lower clamp 22 above it (such as Figure 1 As shown in the figure, the lower clamp 22 is pushed toward the upper clamp 21, thereby clamping the workpiece between the lower clamp 22 and the upper clamp 21 for chamfering. After chamfering is completed, the lower slide 32 retracts and the upper slide 31 descends. The clamp returns to the unclamped state under the action of the return spring 23.

[0021] The upper slider 31 is provided with an inwardly concave retaining groove 310. The upper end of the lower slider 32 is placed in the retaining groove 310, with the top surface of the lower slider 32 contacting the bottom surface of the retaining groove 310. The retaining groove 310 restrains the upper end of the lower slider 32 within the groove, ensuring full contact between the upper and lower sliders 31, 32, and providing sufficient clamping force for the clamp. The top of the upper slider 31 is provided with a soft pad 34 with a curved top surface. When clamping a workpiece, the pad 34 directly contacts the lower clamp 22, ensuring full and reliable contact while also providing protection.

[0022] See also Figure 1 and Figure 2, a feed chute 61 is provided on the turntable 12, and a push rod 62 and a driving member 63 are provided on the machine table 1. The push rod 62 is connected to the driving member 63 and is driven to move back and forth by the driving member 63. The driving member 63 can be a cylinder, a hydraulic cylinder or a linear motor, etc. The turntable 12 is on one side of the vertical plate 11, and the feed chute 61, the push rod 62 and the driving member 63 are on the other side of the vertical plate 11. The turntable 12 is provided with a through first through hole (not shown in the figure) at the position opposite to each clamp. The aperture of the first through hole is slightly larger than the diameter of the workpiece, so that the workpiece can be placed in the first through hole and can move in the hole. A through second through hole (not shown in the figure) is provided on the vertical plate 11. The aperture of the second through hole is slightly larger than the diameter of the workpiece and can be roughly equal to the aperture of the first through hole, so that the workpiece can be placed in the second through hole and can move in the hole. When the clamp is in the position where the workpiece can be clamped, that is, the turntable 12 is rotated to the position as shown in the figure. Figure 1 When in the position shown, the lower fixture clamps the workpiece under the push of the propulsion mechanism, and the second through-hole on the vertical plate 11 faces the first through-hole facing the upper fixture. The push rod 62 first moves along the axial direction of the second through-hole toward the vertical plate 11, extends into the second through-hole and the first through-hole, and pushes out the chamfered workpiece in the upper fixture. Then the push rod 62 retracts, and the workpiece to be chamfered slides along the feed chute 61 to the bottom of the feed chute 61. The push rod 62 moves again toward the vertical plate 11, and pushes the workpiece to be chamfered that has slid to the bottom of the feed chute 61 into the second through-hole, the first through-hole, and the fixture in sequence. The present invention automatically completes the unloading of chamfered workpieces and the loading of workpieces to be chamfered, with a high degree of automation and a simple and compact structure.

[0023] The vertical plate 11 is provided with an inclined discharge chute 64, and the turntable 12 is between the vertical plate 11 and the discharge chute 64. In the vertical direction, the discharge chute 64 is below the second through hole on the vertical plate 11. When the turntable 12 is rotated to Figure 1 When the chamfering, loading, and unloading positions are shown, the discharge chute 64 is below the upper fixture. The push rod 62 then pushes the chamfered workpiece out of the fixture. The workpiece falls onto the discharge chute 64 and slides down along it, quickly and easily collecting the chamfered workpieces. The feed chute 61 and discharge chute 64 are located on either side of the vertical plate 11, making the structure compact and space-saving. Loading and unloading can be performed in one go, resulting in high efficiency.

[0024] See also Figure 1 and Figure 2 The vertical plate 11 is provided with eight brake assemblies, which are evenly arranged on the same circumference of the rotating axis of the turntable 12. The brake assemblies are used to clamp the turntable 12 when the workpiece is chamfered, providing a stable support for the turntable 12, improving the chamfering accuracy, and protecting the chamfering cutter head and turntable. Figure 7 and Figure 8Each brake assembly includes a fixed block 5, a dual-drive member 50, an upper clamping plate 51, an upper connecting plate 52, a lower clamping plate 53, and a lower connecting plate 54. The fixed block 5 is mounted on the vertical plate 11, outside the turntable 12. The upper connecting plate 52 is hinged to the upper portion of the fixed block 5 via an upper hinge. One end of the upper connecting plate 52 on one side of the upper hinge is hinged to the upper portion of the dual-drive member 50, and the other end on the other side of the upper hinge is connected to the upper clamping plate 51. The lower connecting plate 54 is hinged to the lower portion of the fixed block 5 via a lower hinge. One end of the lower connecting plate 54 on one side of the lower hinge is hinged to the lower portion of the dual-drive member 50, and the other end on the other side of the lower hinge is connected to the lower clamping plate 53. The lower clamping plate 53 is located below the upper clamping plate 51, with the edge of the turntable 12 between the upper clamping plate 51 and the lower clamping plate 53. The dual-drive member 50 can simultaneously push the upper connecting plate 52 and the lower connecting plate 54 in opposite directions. When chamfering, the turntable 12 needs to be clamped. The dual-drive member 50 pushes the upper connecting plate 52 upward and the lower connecting plate 54 downward. The upper connecting plate 52 rotates around the upper hinge axis, pushing the upper clamping plate 51 downward. At the same time, the lower connecting plate 54 rotates around the lower hinge axis, pushing the lower clamping plate 53 upward. The upper clamping plate 51 and the lower clamping plate 53 move toward each other, shortening the distance between them and clamping the turntable 12 therebetween. When the chamfering process of a workpiece is completed, the turntable 12 needs to be rotated. The dual-drive member 50 simultaneously pushes the upper connecting plate 52 downward and the lower connecting plate 54 upward. The upper connecting plate 52 rotates around the upper hinge axis, pushing the upper clamping plate 51 upward. At the same time, the lower connecting plate 54 rotates around the lower hinge axis, pushing the lower clamping plate 53 downward. The upper clamping plate 51 and the lower clamping plate 53 move away from each other, increasing the distance between them and releasing the turntable 12 therebetween, allowing the turntable 12 to rotate freely.

[0025] See also Figure 1 and Figure 2 The chamfering mechanism includes a cutter disc 41, a rotating drive assembly and a moving assembly. The cutter disc 41 is provided with a cutter head and is mounted on the rotating drive assembly. The rotating drive assembly includes a transmission 42 and a motor 43. The transmission 42 is connected to the cutter disc 41 and the motor 43. The motor 43 drives the cutter disc 41 to rotate quickly through the transmission 42 to perform a chamfering operation on the workpiece. The moving assembly includes a moving plate 44 and a moving drive member 45. The rotating drive assembly is mounted on the moving plate 44. The moving plate 44 is movably set on the machine table 1. The moving drive member 45 is connected to the moving plate 44 and is driven by the moving drive member 45 to move the moving plate 44. The moving drive member 45 can be a cylinder, a hydraulic cylinder or a linear motor. The moving drive member 45 drives the moving plate 44 to move back and forth relative to the machine table 1 in the direction of the propulsion mechanism to adjust the distance between the cutter disc 41 and the propulsion mechanism. There are two chamfering mechanisms, which are respectively on both sides of the vertical plate 11. The two chamfering mechanisms can chamfer both ends of the workpiece at the same time, greatly improving production efficiency.

[0026] The working process of the present invention is: rotate the turntable 12 to Figure 1In the position shown, the workpiece to be chamfered slides along the feed chute 61 to the bottom of the feed chute 61, and the push rod 62 moves along the axial direction of the second through hole toward the vertical plate 11, and the workpiece to be chamfered that has slid to the bottom of the feed chute 61 is pushed into the second through hole, the first through hole and the upper clamp in sequence; then the turntable rotates 180 degrees, and the upper clamp with the workpiece installed turns to the bottom, and the pushing mechanism pushes the lower clamp 22 to move to the upper clamp 21, thereby clamping the workpiece placed between the lower clamp 22 and the upper clamp 21; then the chamfering mechanism performs a chamfering operation on the workpiece, and at the same time, the push rod 62 pushes another workpiece to be processed The workpiece enters the upper fixture. After chamfering is completed, the turntable rotates 180 degrees, and the fixture holding the chamfered workpiece at the bottom moves to the top, and the fixture holding the workpiece to be chamfered moves to the bottom; the pushing mechanism pushes the lower fixture to clamp the workpiece, and the chamfering mechanism chamfers the workpiece. At the same time, the push rod 62 first pushes the chamfered workpiece in the upper fixture to the discharging chute 64, and then retreats to push another workpiece to be chamfered into the upper fixture. In this way, the loading, chamfering and unloading of a workpiece are all completed automatically. By repeating the above actions, the workpieces can be automatically chamfered continuously.

[0027] The present invention uses a propulsion mechanism with a simple mechanical structure to push the lower clamp to move toward the upper clamp to clamp the workpiece. The clamping of the workpiece is stable and reliable. The clamp automatically returns to a non-clamped state after the thrust of the propulsion mechanism is withdrawn, which is very convenient for loading and unloading the workpiece. While one clamp is clamping the workpiece for chamfering, the workpiece loading and unloading operations are performed on another clamp, which has high production efficiency. The use of a simple structure to automatically complete the loading and unloading operations of the workpiece further improves production efficiency and simplifies the structure. The use of two chamfering mechanisms to chamfer both ends of the workpiece at the same time greatly improves production efficiency. The entire machine structure of the present invention is very simple, easy to operate, low in cost and high in production efficiency.

Claims

1. A chamfering machine, comprising a machine platform (1), a fixture and a chamfering mechanism, wherein the fixture and the chamfering mechanism are arranged on the machine platform, the fixture is used to clamp a workpiece, and the chamfering mechanism is on one side of the fixture and is used to chamfer the clamped workpiece, characterized in that: The machine also includes a propulsion mechanism, which includes an upper slider (31), a lower slider (32) and a propulsion cylinder (33) arranged on the machine (1). The upper slider (31) can move up and down relative to the machine, is above the lower slider (32) and presses on the lower slider (32), and the lower slider (32) can move forward and backward relative to the machine. The propulsion cylinder (33) is installed on the machine (1), and its piston rod is connected to the lower slider (32). The clamp includes an upper clamp (21), a lower clamp (22) and a reset spring (23). The upper clamp (21) The lower clamp (22) is mounted on the machine platform and is movably arranged on the upper clamp (21). The upper slider (31) is below the lower clamp (22). The lower slider (32) moves forward or backward to push the upper slider (31) to move upward. The upper slider (31) moves upward to push the lower clamp (22) to move toward the upper clamp (21), so that the upper clamp (21) and the lower clamp (22) clamp the workpiece together. When the lower slider (32) retreats, the upper slider (31) moves downward, and the reset spring (23) makes the upper clamp (21) and the lower clamp The tool (22) returns to a non-clamping state, the machine (1) includes a vertical plate (11) and a turntable (12) rotatably mounted on the vertical plate, the two clamps are arranged on the turntable (12), the turntable (12) rotates 180 degrees, and the two clamps just exchange positions, the upper clamp of the clamp is between the lower clamp and the rotating shaft of the turntable, the machine is provided with a feed chute (61) and a push rod (62), the turntable is on one side of the vertical plate, the feed chute and the push rod are on the other side of the vertical plate, and the turntable is provided with a through-type second clamp at a position directly opposite to the clamp. A through hole, the vertical plate is provided with a second through hole, when one of the clamps is in a position to clamp the workpiece, the second through hole is opposite to the first through hole facing the other clamp, the push rod can move axially in the second through hole, and can push the workpiece on the feed chute into the second through hole, the first through hole and the clamp in sequence, the vertical plate is provided with an inclined discharging chute, the turntable is between the vertical plate and the discharging chute, the discharging chute is below the second through hole on the vertical plate, the push rod can push the workpiece in the clamp out, the workpiece falls onto the discharging chute and slides down along the discharging chute.

2. The chamfering machine according to claim 1, characterized in that: The vertical plate is provided with a plurality of brake assemblies, which are used to clamp the turntable when chamfering a workpiece.

3. The chamfering machine according to claim 2, characterized in that: The brake assembly comprises a fixed block (5), a dual-drive member (50), an upper clamping plate (51), an upper connecting plate (52), a lower clamping plate (53) and a lower connecting plate (54), wherein the fixed block (5) is mounted on the vertical plate (11), the upper connecting plate (52) is hinged to the upper portion of the fixed block (5) via an upper hinge shaft, one end of the upper connecting plate (52) on one side of the upper hinge shaft is hinged to the upper portion of the dual-drive member (50), and the other end on the other side of the upper hinge shaft is connected to the upper clamping plate (51), and the lower connecting plate (54) is hinged to the upper portion of the dual-drive member (50). The lower connecting plate (54) is hinged to the lower part of the fixed block (5) through the lower hinge shaft. One end of the lower connecting plate (54) on one side of the lower hinge shaft is hinged to the lower part of the dual driving member (50). The other end on the other side of the lower hinge shaft is connected to the lower clamping plate (53). The lower clamping plate (53) is below the upper clamping plate (51). The edge of the turntable (12) is between the upper clamping plate (51) and the lower clamping plate (53). The dual driving member (50) can simultaneously push the upper connecting plate (52) and the lower connecting plate (54) in opposite directions.

4. The chamfering machine according to claim 3, characterized in that: There are two chamfering mechanisms, which are respectively located on both sides of the vertical plate.

5. The chamfering machine according to claim 4, characterized in that: The contact surfaces of the upper slider (31) and the lower slider (32) are inclined surfaces that form an acute angle with the horizontal plane.

6. The chamfering machine according to claim 5, characterized in that: A soft pad (34) is provided on the top of the upper sliding block (31), and the top of the soft pad (34) has an arc-shaped surface.

7. The chamfering machine according to claim 6, characterized in that: The upper slider (31) is provided with an inwardly concave limiting groove (310), the upper end of the lower slider (32) is placed in the limiting groove (310), and the top surface of the lower slider (32) contacts the bottom surface of the limiting groove (310).

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