Driving device and control method of sliding knife seat of bar cutting machine

Abstract

The application belongs to the technical field of mechanical equipment, and particularly relates to a driving device and a control method of a sliding cutter holder of a bar cutting machine, wherein the driving device comprises a machine head holder, a cutter holder oil cylinder, a reset oil cylinder and a sliding cutter holder sliding on the machine head holder, the cutter holder oil cylinder and the reset oil cylinder are arranged on the machine head holder, the cutter holder oil cylinder and the reset oil cylinder are single-acting oil cylinders, the cutter holder oil cylinder and the reset oil cylinder directly or indirectly act on the sliding cutter holder to realize the reciprocating movement of the sliding cutter holder, the cutter holder oil cylinder and the reset oil cylinder of the application are single-acting oil cylinders, only the advance is considered, that is, when the telescopic rod of the cutter holder oil cylinder is extended to drive the sliding cutter holder to move, the telescopic rod of the reset oil cylinder is also retracted, vice versa, that is, when the telescopic rod of the reset oil cylinder is extended to drive the sliding cutter holder to move, the telescopic rod of the cutter holder oil cylinder is also retracted, the oil consumption in single action is reduced, the action speed of the oil cylinder is fast, the shearing times are increased, the cost is effectively reduced, and the work efficiency is improved.

Description

Technical fields:

[0001] This invention belongs to the field of mechanical equipment technology, specifically referring to a driving device and control method for a sliding cutter holder of a bar cutting machine. Background technology:

[0002] A bar cutting machine is a specialized device for cutting metal bars or wires to a designed length, facilitating further processing. The cut workpieces require high length accuracy and a flat end face. Existing bar cutting machines include a headstock, a sliding cutter holder, and a lifting slide block. The sliding cutter holder and the headstock are slidably connected by a first guide structure. A first cutting die is fixed on the headstock, and a second cutting die is fixed on the sliding cutter holder. The lifting slide block and the sliding cutter holder are slidably connected by a second guide structure, with the first and second guide structures arranged in parallel directions. A lifting cylinder is mounted on the sliding cutter holder, driving the lifting slide block. A cutter holder cylinder is mounted on the headstock. During cutting, the bar passes through the first and second cutting dies. The lifting cylinder drives the lifting slide block to move towards the bar until it is clamped by the second cutting die. Finally, the cutter holder cylinder drives the sliding cutter holder to move to the first and second cutting dies to cut the bar. After the material is cut, the sliding cutter holder needs to be reset.

[0003] The applicant previously proposed a tool holder drive mechanism for a bar cutting machine (Publication No. CN204094539U, Publication Date 2015.01.14). This tool holder drive mechanism includes a hydraulic cylinder, a main drive rod, an upper drive rod, and a lower drive rod. The hydraulic cylinder is connected to the end face of the frame. The main drive rod is rotatably connected to the end face of the frame via a main pin. One end of the main drive rod is hinged to one end of the upper drive rod via the upper pin. The other end of the upper drive rod is hinged to the tool holder. The other end of the main drive rod is hinged to one end of the lower drive rod via the lower pin. The other end of the lower drive rod is hinged to the piston rod of the hydraulic cylinder. One extension and retraction of the hydraulic cylinder enables one reciprocating movement of the tool holder. However, one extension and retraction of the hydraulic cylinder requires two reversing oil supply cycles. Due to the large inertia of the tool holder, the control stroke distance accuracy is low. The large cross-sectional area of ​​the piston retraction action of the hydraulic cylinder results in high oil consumption and slow operation, affecting the cutting efficiency. Summary of the Invention:

[0004] The purpose of this invention is to provide a sliding cutter holder drive device and control method for a bar cutting machine that features fast operation of the cutter holder cylinder and reset cylinder, improved cutting efficiency, and precise stroke control by eliminating the inertia of the sliding cutter holder.

[0005] This invention is implemented as follows:

[0006] One objective of this invention is to provide a driving device for a sliding cutter holder of a bar cutting machine, comprising a headstock, a cutter holder cylinder, a reset cylinder, and a sliding cutter holder slidably mounted on the headstock. The cutter holder cylinder and the reset cylinder are mounted on the headstock and are single-acting cylinders. The cutter holder cylinder and the reset cylinder act directly or indirectly on the sliding cutter holder to achieve the reciprocating motion of the sliding cutter holder.

[0007] Alternatively, the tool holder cylinder and the reset cylinder may be double-acting cylinders. The pressure side of the tool holder cylinder supplies oil to advance, while the pull side of the reset cylinder supplies oil to retract, driving the sliding tool holder to advance. Conversely, the pressure side of the reset cylinder supplies oil, while the pull side of the tool holder cylinder supplies oil to retract, driving the sliding tool holder to reset.

[0008] In the sliding cutter holder drive device of the above-mentioned bar cutting machine, the sliding cutter holder is slidably mounted on the machine head seat via a guide rail, and the sliding cutter holder moves along the guide rail.

[0009] In the aforementioned sliding cutter holder drive device for a bar cutting machine, the sliding cutter holder is slidably mounted on the headstock via a guide rail, and the sliding cutter holder moves on the headstock along the guide rail.

[0010] In the aforementioned sliding cutter holder drive device for a bar cutting machine, the reset cylinder and the cutter holder cylinder are mounted on the machine head base at both ends of the sliding cutter holder, and the piston rods of the reset cylinder and the cutter holder cylinder are respectively connected to the two end faces of the sliding cutter holder.

[0011] In the sliding cutter holder drive device of the above-mentioned bar cutting machine, the reset cylinder and the cutter holder cylinder are set on the machine head seat at both ends of the sliding cutter holder, and the number and position of the reset cylinder and the guide rail correspond one-to-one. The piston rod of the cutter holder cylinder is in contact with one end face of the sliding cutter holder, and the piston rod of the reset cylinder is in contact with the end face of the guide rail.

[0012] In the sliding cutter head drive device of the above-mentioned bar cutting machine, the guide rails are spaced apart along the vertical direction of the machine head seat, and two corresponding reset cylinders are provided.

[0013] In the sliding cutter holder drive device of the above-mentioned bar cutting machine, the reset cylinder and the cutter holder cylinder are switched to each other by a reversing valve.

[0014] In the sliding cutter head drive device of the above-mentioned bar cutting machine, one reversing valve is provided.

[0015] In the sliding cutter head drive device of the above-mentioned bar cutting machine, the effective cross-section of the piston of the cutter head cylinder is larger than the effective cross-section of the piston of the reset cylinder.

[0016] Another objective of this invention is to provide a control method for a sliding cutter holder of a bar cutting machine, comprising a headstock, a cutter holder cylinder, a reset cylinder, and a sliding cutter holder slidably mounted on the headstock;

[0017] The tool holder cylinder and the reset cylinder are single-acting cylinders.

[0018] When the tool holder cylinder supplies oil and the reset cylinder stops supplying oil, the piston rod of the tool holder cylinder extends outward, thereby driving the sliding tool holder to move away from the tool holder cylinder. At the same time, the sliding tool holder drives the piston rod of the reset cylinder to retract.

[0019] When the reset cylinder supplies oil and the tool holder cylinder stops supplying oil, the piston rod of the reset cylinder extends outward, thereby driving the sliding tool holder to move away from the reset cylinder. At the same time, the sliding tool holder drives the piston rod of the tool holder cylinder to retract.

[0020] Alternatively: the tool holder cylinder and the reset cylinder are double-acting cylinders.

[0021] When the pressure side of the tool holder cylinder advances, the pull side of the reset cylinder retracts, driving the sliding tool holder forward.

[0022] When the pressure side of the reset cylinder is supplied with oil, the pull side of the tool holder cylinder is supplied with oil and retracts, driving the sliding tool holder to reset.

[0023] The outstanding advantages of this invention compared to the prior art are:

[0024] 1. The tool holder cylinder and reset cylinder of this invention act opposite each other on the tool holder slider, which can effectively counteract the inertia generated by the reciprocating motion of the tool holder slider, making stroke control more precise and the cross-sectional quality of the bar stock higher. Because the effective piston area of ​​the reset cylinder is small, the amount of oil used in a single action is reduced, the cylinder's action speed is faster, and the number of shearing operations is increased, effectively reducing costs, improving work efficiency, and greatly reducing the risk of oil leakage, thus improving the quality of the equipment.

[0025] 2. The effective cross-section of the reset cylinder of the present invention is smaller than that of the tool holder cylinder, which can reduce the power requirements of the motor, cylinder and other components in the equipment. Attached image description:

[0026] Figure 1 This is a partial cross-sectional schematic diagram of the main view of Embodiment 1 of the present invention;

[0027] Figure 2 This is a right view of Embodiment 1 of the present invention;

[0028] Figure 3 yes Figure 2 AA section view;

[0029] Figure 4 This is a top view of Embodiment 1 of the present invention;

[0030] Figure 5 This is a partial cross-sectional schematic diagram of the main view of Embodiment 2 of the present invention;

[0031] Figure 6 This is the right view of Embodiment 2 of the present invention.

[0032] In the diagram: 1. Headstock; 2. Cutter holder cylinder; 3. Reset cylinder; 4. Sliding cutter holder; 5. Guide rail; 6. Fixed die; 7. Moving die; 8. Lifting cylinder; 9. Lifting slider. Detailed implementation method:

[0033] The present invention will be further described below with reference to specific embodiments.

[0034] Example 1: See Figure 1-4 :

[0035] This invention provides a driving device for a sliding cutter holder of a bar cutting machine. The bar cutting machine includes a headstock 1, a cutter holder cylinder 2, a reset cylinder 3, and a sliding cutter holder 4. The sliding cutter holder 4 is slidably mounted on the headstock 1 via a guide rail 5. In this embodiment, the guide rail 5 is also slidably connected to the headstock 1, meaning the sliding cutter holder 4 moves back and forth on the headstock 1 along with the guide rail 5. Alternatively, the guide rail 5 can be fixed to the headstock 1, allowing the sliding cutter holder 4 to move back and forth along the guide rail 5. To ensure smooth sliding of the sliding cutter holder 4, two guide rails 5 are provided, parallel to each other and spaced apart along the vertical direction of the headstock 1. The sliding cutter holder 4 is located between the upper and lower guide rails 5. A fixed cutter die 6 is fixed on the headstock 1, and a movable cutter die 7 is fixed on the sliding cutter holder 4. A lifting cylinder 8 is installed on the sliding cutter holder 4, driving a lifting slider 9. The lifting cylinder 8 moves with the sliding cutter holder 4.

[0036] In this embodiment, the tool holder cylinder 2 and the reset cylinder 3 are fixedly mounted on the machine headstock 1 by fasteners, and the tool holder cylinder 2 and the reset cylinder 3 are located at both ends of the sliding tool holder 4. The tool holder cylinder 2 and the reset cylinder 3 are single-acting cylinders.

[0037] When clamping the bar stock, the lifting cylinder 8 drives the lifting slider 9 to move towards the bar stock and clamps the bar stock with the moving die 7. When cutting, the cutter holder cylinder 2 actuates, driving the bar stock to move with the sliding cutter holder 4 until the fixed die 6 and the moving die 7 cut the bar stock. During this process, the piston rod of the reset cylinder 3 retracts under the action of the sliding cutter holder 4.

[0038] After the material is cut, the sliding cutter holder 4 and the cutter holder cylinder 2 need to be reset. The reset cylinder 3 acts on the sliding cutter holder 4 to drive the sliding cutter holder 4 to move toward one end of the cutter holder cylinder 2 to reset. During this process, the piston rod of the cutter holder cylinder 2 retracts under the action of the sliding cutter holder 4.

[0039] As can be seen from the above, the sliding blade holder of the present invention achieves reciprocating motion by switching between the blade holder cylinder 2 and the reset cylinder 3. The amount of oil used in the whole structure is reduced, the cylinder action speed is fast, and the number of shearing operations is increased, which effectively reduces costs, improves work efficiency, and greatly reduces the risk of oil leakage, thereby improving the quality of the equipment.

[0040] Furthermore, the piston rods of the reset cylinder 3 and the tool holder cylinder 2 are respectively connected to the two end faces of the sliding tool holder 4. The extension and retraction stroke of the piston rods of the reset cylinder 3 and the tool holder cylinder 2 is the reciprocating stroke of the sliding tool holder 4. This arrangement facilitates disassembly, assembly, and maintenance.

[0041] Furthermore, the reset cylinder 3 and the tool holder cylinder 2 of this invention are controlled to switch between each other via a reversing valve. One or two reversing valves can be used. In this embodiment, one reversing valve is preferred. The oil tank is connected to the oil pump, and the oil pump outlet is connected to the reset cylinder 3 and the tool holder cylinder 2 respectively via the reversing valve and oil pipe. When the tool holder cylinder 2 is working, the reversing valve opens the drain hole connecting the pressure chamber to the tool holder cylinder 2, allowing hydraulic oil to enter and push the piston rod outward. At this time, the return chamber of the reversing valve, connected to the drain hole of the reset cylinder 3, is in a return state, and the oil in the reset cylinder 3 returns to the oil tank. Conversely, the reversing valve opens the drain hole connecting the pressure chamber to the reset cylinder 3 and the return chamber of the reversing valve, connected to the drain hole of the tool holder cylinder 2, causing the piston rod of the reset cylinder 3 to extend outward, and the oil in the tool holder cylinder 2 returns to the oil tank.

[0042] The effective cross-section of the tool holder cylinder 2 in this invention is larger than that of the reset cylinder 3. This reduces the power requirements of the matching motor and cylinder. Here, the effective cross-section refers to the area of ​​the piston inside the cylinder.

[0043] Example 2: See Figure 5-6 :

[0044] The basic structure of this embodiment is the same as that of Embodiment 1, except that:

[0045] In this embodiment, the reset cylinder 3 acts on the sliding tool holder 4 via the guide rail 5, as detailed below:

[0046] The reset cylinder 3 is fixed on the machine head base 1, and the piston rod of the reset cylinder 3 is in contact with the end face of the guide rail 5.

[0047] The number and position of the reset cylinders 3 correspond one-to-one with the guide rails 5. In this embodiment, there are two guide rails 5, and correspondingly two reset cylinders 3.

[0048] When cutting material, the cutter holder cylinder 2 drives the sliding cutter holder 4 to move toward one end of the reset cylinder 3. The guide rail 5 moves synchronously with the sliding cutter holder 4 and acts on the piston rod of the reset cylinder 3 to retract it.

[0049] When the sliding tool holder 4 is reset, the reset cylinder 3 acts on the guide rail 5 to move toward the end of the tool holder cylinder 2, causing the sliding tool holder 4 to move together. The sliding tool holder 4 acts on the piston rod of the tool holder cylinder 2 to retract it.

[0050] Example 3: The structure of this example is basically the same as that of Example 1 and Example 2, except that the reset cylinder and the tool holder cylinder in this example are double-acting cylinders.

[0051] When the pressure side of the tool holder cylinder advances, the pull side of the reset cylinder retracts, driving the sliding tool holder forward.

[0052] When the pressure side of the reset cylinder is supplied with oil, the pull side of the tool holder cylinder is supplied with oil and retracts, driving the sliding tool holder to reset.

[0053] Example 4: See Figure 1-6 :

[0054] This embodiment provides a control method for a sliding cutter holder of a bar cutting machine, including a headstock 1, a cutter holder cylinder 2, a reset cylinder 3, and a sliding cutter holder 4 slidably mounted on the headstock 1. The cutter holder cylinder 2 and the reset cylinder 3 are single-acting cylinders.

[0055] When the reversing valve controls the oil supply of the reset cylinder 3 and the oil supply of the tool holder cylinder 2 stops, the piston rod of the reset cylinder 3 extends outward, thereby driving the sliding tool holder 4 to move away from the reset cylinder 3. At the same time, the sliding tool holder 4 drives the piston rod of the tool holder cylinder 2 to retract.

[0056] When the sliding tool holder 4 moves in the reverse direction, the reversing valve controls the tool holder cylinder 2 to supply oil and the reset cylinder 3 to stop supplying oil. The piston rod of the tool holder cylinder 2 extends outward, thereby driving the sliding tool holder 4 to move away from the tool holder cylinder 2. At the same time, the sliding tool holder 4 drives the piston rod of the reset cylinder 3 to retract.

[0057] The reciprocating motion of the sliding tool holder 4 is achieved by switching the actions of the tool holder cylinder 2 and the reset cylinder 3 through a reversing valve.

[0058] Example 5:

[0059] The control method in this embodiment is basically the same as that in embodiment 4, except that:

[0060] The tool holder cylinder and the reset cylinder are double-acting cylinders.

[0061] When the pressure side of the tool holder cylinder advances, the pull side of the reset cylinder retracts, driving the sliding tool holder forward.

[0062] When the pressure side of the reset cylinder is supplied with oil, the pull side of the tool holder cylinder is supplied with oil and retracts, driving the sliding tool holder to reset.

[0063] The above embodiments are merely one of the preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Therefore, all equivalent changes made in accordance with the shape, structure and principle of the present invention should be covered within the protection scope of the present invention.

Claims

1. A driving device for a sliding cutter holder of a bar cutting machine, comprising a headstock (1), a cutter holder cylinder (2), a reset cylinder (3), and a sliding cutter holder (4) slidably mounted on the headstock (1), characterized in that: The tool holder cylinder (2) and the reset cylinder (3) are mounted on the machine head (1). The tool holder cylinder (2) and the reset cylinder (3) are single-acting cylinders. The actions of the tool holder cylinder (2) and the reset cylinder (3) switch with each other and act directly or indirectly on the sliding tool holder (4) to realize the reciprocating motion of the sliding tool holder (4). Alternatively, the tool holder cylinder (2) and the reset cylinder (3) may be double-acting cylinders. The pressure side of the tool holder cylinder is inlet oil to advance, and the pull side of the reset cylinder is inlet oil to retract, driving the sliding tool holder to advance. Conversely, the pressure side of the reset cylinder is inlet oil to supply oil, and the pull side of the tool holder cylinder is inlet oil to retract, driving the sliding tool holder to reset. The effective cross section of the piston force of the tool holder cylinder (2) is greater than that of the effective cross section of the piston force of the reset cylinder (3).

2. The driving device for the sliding cutter holder of a bar cutting machine according to claim 1, characterized in that: The sliding cutter holder (4) is slidably mounted on the machine head seat (1) via the guide rail (5), and the sliding cutter holder (4) moves along the guide rail (5).

3. The driving device for the sliding cutter holder of a bar cutting machine according to claim 1, characterized in that: The sliding cutter holder (4) is slidably mounted on the headstock (1) via the guide rail (5), and the sliding cutter holder (4) moves on the headstock (1) along with the guide rail (5).

4. The driving device for the sliding cutter holder of a bar cutting machine according to claim 1, 2, or 3, characterized in that: The reset cylinder (3) and the tool holder cylinder (2) are mounted on the headstock (1) at both ends of the sliding tool holder (4). The forces of the reset cylinder (3) and the tool holder cylinder (2) act opposite to each other on the two end faces of the sliding tool holder (4).

5. The driving device for the sliding cutter holder of a bar cutting machine according to claim 3, characterized in that: The reset cylinder (3) and the tool holder cylinder (2) are set on the headstock (1) at both ends of the sliding tool holder (4), and the number and position of the reset cylinder (3) correspond one-to-one with the guide rail (5). The piston rod of the tool holder cylinder (2) is in contact with one end face of the sliding tool holder (4), and the piston rod of the reset cylinder (3) is in contact with the end face of the guide rail (5).

6. The driving device for the sliding cutter holder of a bar cutting machine according to claim 5, characterized in that: The guide rail (5) is spaced up and down along the headstock (1), and there are two corresponding reset cylinders (3).

7. A driving device for a sliding cutter holder of a bar cutting machine according to claim 1 or 5, characterized in that: The reset cylinder (3) and the tool holder cylinder (2) are switched to each other by a reversing valve.

8. The driving device for the sliding cutter holder of a bar cutting machine according to claim 7, characterized in that: One reversing valve is provided.

9. A control method for a sliding cutter holder of a bar cutting machine, comprising a headstock (1), a cutter holder cylinder (2), a reset cylinder (3), and a sliding cutter holder (4) slidably mounted on the headstock (1), characterized in that: The tool holder cylinder (2) and the reset cylinder (3) are connected to the machine head (1) and act on the two ends of the sliding tool holder (4) respectively. The effective cross section of the piston force of the tool holder cylinder (2) is greater than that of the effective cross section of the piston force of the reset cylinder (3); The tool holder cylinder (2) and the reset cylinder (3) are single-acting cylinders. When the tool holder cylinder (2) supplies oil and the reset cylinder (3) stops supplying oil, the piston rod of the tool holder cylinder (2) extends outward, thereby driving the sliding tool holder (4) to move away from the tool holder cylinder (2), and at the same time the sliding tool holder (4) drives the piston rod of the reset cylinder (3) to retract. When the reset cylinder (3) supplies oil and the tool holder cylinder (2) stops supplying oil, the piston rod of the reset cylinder (3) extends outward, thereby driving the sliding tool holder (4) to move away from the reset cylinder (3). At the same time, the sliding tool holder (4) drives the piston rod of the tool holder cylinder (2) to retract. Alternatively: The tool holder cylinder (2) and the reset cylinder (3) are double-acting cylinders. When the pressure side of the tool holder cylinder (2) advances, the pull side of the reset cylinder (3) retracts, driving the sliding tool holder (4) forward; When the pressure side of the reset cylinder (3) is supplied with oil, the pull side of the tool holder cylinder (2) is supplied with oil and retracts, driving the sliding tool holder (4) to reset.

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