Swing angle clamp and clamping adjustment method

Abstract

A swing-angle clamp includes a bed body, a support cylinder, a triangular swing arm, a clamp bracket, a pressing cylinder, a clamping rocker arm, and a bearing seat. The clamp bracket is located on the upper side of the bed body. The lower part of the support cylinder is hinged to the lower part of the clamp bracket. The middle part of the triangular swing arm is hinged to the upper part of the clamp bracket. The front end of the support cylinder is hinged to the rear end of the triangular swing arm. The pressing cylinder is located at the upper front end of the triangular swing arm, and its extension rod passes through the front of the triangular swing arm, with its lower end hinged to the upper part of the clamping rocker arm. The bearing seat is slidably located at the front and rear of the upper end of the bed body. This allows the clamping rocker arm to swing at a small angle, ensuring that the clamping force on the two workpieces is balanced and equal, and overcoming the slight difference in the outer diameters of the two workpieces.

Description

Technical Field

[0001] This invention relates to the technical field of auxiliary devices for machine tools, specifically to a swing angle clamp and a clamping adjustment method. Background Technology

[0002] Angle-swing chucks utilize a lever structure to clamp workpieces, offering advantages such as high clamping force and automatic angle opening for easy workpiece removal. However, when used for clamping two workpieces, angle-swing chucks present several challenges, including increased arm overhang. To maintain clamping force and opening angle, using a traditional straight arm, especially with limited machine tool center height, necessitates increasing the chuck's width, reducing the rigidity of the connection between the chuck and the worktable. Other issues include balancing the clamping force for both workpieces, adjusting for different workpiece outer diameters and lengths, and the fact that pressure application is entirely dependent on terminal-controlled sensors. Inaccurate or insensitive sensors can damage the clamping equipment, and inaccurate placement of the clamping components can also cause damage to both the equipment and the components themselves. Summary of the Invention

[0003] This invention provides a swing angle clamp and clamping adjustment method to solve the technical problems mentioned in the background art.

[0004] A swing-angle clamp includes a bed body, a support cylinder, a triangular swing arm, a clamp bracket, a pressing cylinder, a clamping rocker arm, and a support seat. The clamp bracket is located on the upper side of the bed body; the lower part of the support cylinder is hinged to the lower part of the clamp bracket; the middle part of the triangular swing arm is hinged to the upper part of the clamp bracket; the front end of the support cylinder is hinged to the rear end of the triangular swing arm; the pressing cylinder is located at the upper front end of the triangular swing arm, and its telescopic rod passes through the front of the triangular swing arm, with its lower end hinged to the upper part of the clamping rocker arm; the support seat is slidably mounted on... At the front and rear of the upper end of the bed body, a first actuating cylinder is provided in the middle of the internal part of the pressing rocker arm. The first actuating cylinder is connected to a first air pump through a solenoid valve and is also connected to a first pressure sensor. A pad is inclinedly provided in the middle of the support seat, and a placement space is provided in the middle of the support seat. A contact seat is provided at the lower part of the pad and is inserted into the placement space. A second actuating cylinder is provided at the bottom of the placement space of the support seat. The second actuating cylinder is connected to a second air pump through a solenoid valve and is also connected to a second pressure sensor.

[0005] Preferably, the swing angle clamp is characterized in that the first pressure sensor of the first actuating cylinder and the second pressure sensor of the second actuating cylinder are electrically connected to a control terminal, and the control terminal is electrically connected to the pressing cylinder.

[0006] Preferably, the swing angle clamp is characterized in that the bearing seats at the front and rear of the upper end of the bed body are provided with at least two sets, which are arranged side by side at the upper end of the bed body. Each set of bearing seats is provided with at least two sets of bearing parts, the placement space is located in the middle of the bearing parts, each set of bearing parts is provided with at least one set of second action cylinders, and each set of second action cylinders is connected to an independent second pressure sensor. The pad is inclinedly arranged at the upper end of the bearing part.

[0007] Preferably, the sway angle clamp is characterized in that the pressing rocker arm is provided with at least two sets of curved pressing spaces, and at least one set of first action cylinders is provided at the top center of each curved pressing space. The lower end of the first action cylinder is connected to a pressure plate, the length of the pressure plate is the same as the length of the pressing rocker arm, and buffer springs are provided between the two ends of the pressure plate and the pressing rocker arm. Each set of first action cylinders is connected to an independent first pressure sensor.

[0008] Preferably, the swing angle clamp is characterized in that the length of the clamping rocker arm is consistent with the distance between the front and rear bearing seats of the bed body.

[0009] Preferably, the swing arm is characterized in that an alarm light and a buzzer are provided at the upper end of the triangular swing arm.

[0010] The clamping and adjustment method of the swing angle clamp is characterized by including the following steps:

[0011] S1: The second air pump is started through the control terminal to inflate the second working cylinder. At the same time, the lower limit of the range of the second pressure sensor is set. When the lower limit value of the range of the second pressure sensor is reached, the solenoid valve is closed through the control terminal, and the clamping part is placed into the carrier.

[0012] S2: Start the support cylinder through the control terminal to move the triangular swing arm above the clamping part, start the first air pump through the control terminal to inflate the first actuating cylinder, and set the lower limit of the range of the first pressure sensor. When the lower limit value of the range of the first pressure sensor is reached, close the solenoid valve through the control terminal.

[0013] S3: The lowering cylinder is started via the control terminal. Simultaneously, the control terminal detects the transmitted values ​​from the first and second pressure sensors and controls the lowering cylinder accordingly. The calculation formulas for the measurements from the first and second pressure sensors are as follows:

[0014]

[0015] Where P represents the actual pressure value, Vr represents the sensor output current, Pmax represents the upper limit of the pressure sensor range, and Pmin represents the lower limit of the pressure sensor range.

[0016] Preferably, the clamping adjustment method of the swing angle clamp is characterized in that the output current of the first pressure sensor and the second pressure sensor are constant values.

[0017] Preferably, the clamping adjustment method of the swing angle clamp is characterized in that the actual pressure value is the pressure value inside the first acting cylinder and the second acting cylinder.

[0018] Preferably, the clamping adjustment method of the swing angle clamp is characterized in that the upper limit of the pressure sensor range is the maximum upper limit value set by the control terminal.

[0019] Beneficial effects: This invention adopts a novel structure. The fixture worktable is designed as a slide structure, which can be installed on the bed of various machine tools. The worktable is arranged with a double workpiece clamping station. The triangular swing arm adopts a hydraulic cylinder driven lever structure, which ensures the clamping force while ensuring the maximum opening angle of the fixture. The cylinder end is hinged to the side near the worktable to ensure the compactness and sufficient rigidity of the fixture structure. The clamping rocker arm is hinged to the end of the triangular swing arm to realize the small-angle swing of the clamping rocker arm, ensuring that the clamping force of the two workpieces is balanced and equal, and overcoming the small difference in the outer diameter of the two workpieces. Attached Figure Description

[0020] Figure 1 This is the main structural view of the present invention.

[0021] Figure 2 This is a side view of the structure of the present invention.

[0022] Figure 3 This is an overall structural diagram of the first working cylinder of the present invention.

[0023] Figure 4 This is an overall structural diagram of the second working cylinder of the present invention.

[0024] Figure 5 This is a schematic diagram illustrating the operation of the instructions in this invention.

[0025] Explanation of reference numerals in the attached drawings: 1. Bed body; 2. Support cylinder; 3. Triangular swing arm; 3. Alarm light; 301. Buzzer; 302. Clamp bracket; 4. Pressing cylinder; 5. Pressing rocker arm; 6. First-acting cylinder; 601. First pressure sensor; 602. First air pump; 603. Buffer spring; 604. Pressure plate; 605. Bearing seat; 7. Pad; 701. Contact seat; 702. Second-acting cylinder; 703. Second air pump; 704. Second pressure sensor; 705. Detailed Implementation

[0026] The present invention will be further described below with reference to specific embodiments. The illustrative embodiments and descriptions herein are used to explain the present invention, but are not intended to limit the present invention.

[0027] A swing-angle clamp includes a bed body 1, a support cylinder 2, a triangular swing arm 3, a clamp bracket 4, a pressing cylinder 5, a clamping rocker arm 6, and a bearing seat 7. The clamp bracket 4 is located on the upper side of the bed body 1. The lower part of the support cylinder 2 is hinged to the lower part of the clamp bracket 4. The middle part of the triangular swing arm 3 is hinged to the upper part of the clamp bracket 4. The front end of the support cylinder 2 is hinged to the rear end of the triangular swing arm 3. The pressing cylinder 5 is located at the upper front end of the triangular swing arm 3, and the telescopic rod of the pressing cylinder 5 passes through the front of the triangular swing arm 3, with its lower end hinged to the upper part of the clamping rocker arm 6. The bearing seat 7 is slidably located at the front and rear ends of the upper part of the bed body 1. A first actuating cylinder 601 is provided in the middle of the pressing rocker arm 6. The first actuating cylinder 601 is connected to a first air pump 603 through a solenoid valve, and the first actuating cylinder 601 is also connected to a first pressure sensor 602. A pad 701 is inclinedly provided in the middle of the bearing seat 7. A placement space is provided in the middle of the bearing seat 7. A contact seat 702 is provided at the lower part of the pad 701. The contact seat 702 is inserted into the placement space. A second actuating cylinder 703 is provided at the bottom of the placement space of the bearing seat 7. The second actuating cylinder 703 is connected to a second air pump 704 through a solenoid valve, and the second actuating cylinder 703 is also connected to a second pressure sensor 705.

[0028] Furthermore, the first pressure sensor 602 and the second pressure sensor 705 of the first acting cylinder 601 and the second acting cylinder 703 are electrically connected to the control terminal, and the control terminal is electrically connected to the pressing cylinder 5.

[0029] Furthermore, the upper front and rear bearing seats 7 of the bed body 1 are provided with at least two sets, which are arranged side by side at the upper end of the bed body 1. Each set of bearing seats 7 is provided with at least two sets of bearing parts, and the placement space is located in the middle of the bearing parts. Each set of bearing parts is provided with at least one set of second action cylinders 703, and each set of second action cylinders 703 is connected to an independent second pressure sensor 705. The pad 701 is inclinedly arranged at the upper end of the bearing part.

[0030] Furthermore, the pressing rocker arm 6 is provided with at least two sets of curved pressing spaces. Each curved pressing space is provided with at least one set of first acting cylinders 601 at the top center. The lower end of the first acting cylinder 601 is connected to a pressure plate 605. The length of the pressure plate 605 is the same as the length of the pressing rocker arm 6. Buffer springs 604 are provided between the two ends of the pressure plate 605 and the pressing rocker arm 6. Each set of first acting cylinders 601 is connected to an independent first pressure sensor 602.

[0031] Furthermore, the length of the clamping rocker arm 6 is consistent with the distance between the front and rear bearing seats 7 of the bed body 1.

[0032] Furthermore, the upper end of the triangular swing arm 3 is equipped with an alarm light 301 and a buzzer 302.

[0033] The clamping and adjustment method of the swing angle clamp is characterized by including the following steps:

[0034] S1: The second air pump 704 is started through the control terminal to inflate the second actuating cylinder 703. At the same time, the lower limit of the range of the second pressure sensor 705 is set. When the lower limit value of the range of the second pressure sensor 705 is reached, the solenoid valve is closed through the control terminal, and the clamping part is placed into the carrier seat 7.

[0035] S2: Start the support cylinder 2 through the control terminal to move the triangular swing arm 3 above the clamping member. Start the first air pump 603 through the control terminal to inflate the first actuating cylinder 601. At the same time, set the lower limit of the range of the first pressure sensor 602. When the lower limit value of the range of the first pressure sensor 602 is reached, close the solenoid valve through the control terminal.

[0036] S3: The lowering cylinder 5 is started via the control terminal. Simultaneously, the control terminal detects the transmitted values ​​from the first pressure sensor 602 and the second pressure sensor 705, and controls the lowering cylinder 5 in conjunction with these values. The calculation formulas for the measurements taken by the first pressure sensor 602 and the second pressure sensor 705 are as follows:

[0037]

[0038] Where P represents the actual pressure value, Vr represents the sensor output current, Pmax represents the upper limit of the pressure sensor range, and Pmin represents the lower limit of the pressure sensor range.

[0039] Furthermore, the output currents of the first pressure sensor 602 and the second pressure sensor 705 are constant.

[0040] Furthermore, the actual pressure value is the pressure value inside the first acting cylinder 601 and the second acting cylinder 703.

[0041] Furthermore, the upper limit of the pressure sensor's range is the maximum upper limit value set by the control terminal.

[0042] During operation, the support cylinder 2 is activated via the control terminal, causing the triangular swing arm 3 to move above the clamping component. The first acting cylinder 601 and the second acting cylinder 703 are then pressurized to the required air pressure via the first air pump 603 and the second air pump 704. The solenoid valve is then closed, and the pressurized air pressure is set to the actual pressure value at the control terminal. The workpiece is then placed onto the bearing seat 7. At this time, the second pressure sensor 705 receives the pressure value from the new second acting cylinder 703 and sets it as the lower limit of the pressure sensor's range. Each bearing seat 7 has at least two opposing second acting cylinders 703 and a second pressure sensor 705. The front and rear bearing seats 7 have four second acting cylinders 703. And the second pressure sensor 705, so the control terminal can only control the oil pump of the pressing cylinder 5 to work when the pressure values ​​received by the four second pressure sensors 705 are consistent, so as to proceed to the next step of operation. If the pressure values ​​received by the four second pressure sensors 705 are inconsistent, the control terminal will not activate the oil pump of the pressing cylinder 5, but will activate the alarm light 301 and buzzer 302. The pressing cylinder 5 works by clamping the workpiece by pressing the rocker arm 6. At this time, the pressure plate 605 is subjected to pressure and transmits the pressure to the first actuating cylinder 601, and the pressure information is transmitted to the first pressure sensor 602. Furthermore, the lower limit of the pressure sensor range of the first pressure sensor 602 is set to be consistent with the lower limit of the pressure sensor range of the second pressure sensor 705, and the upper limit of the pressure sensor ranges of the first pressure sensor 602 and the second pressure sensor 705 is set to the required maximum value. When the upper limit values ​​of the pressure sensor ranges of the first pressure sensor 602 and the second pressure sensor 705 exceed the set value range, the control terminal stops the operation of the pressing cylinder 5, and the oil pump of the pressing cylinder 5 reverses its operation, causing the extension rod of the pressing cylinder 5 to rise. Then, the buzzer 302 and the alarm light 301 are activated. When the second pressure sensor 705 detects that the normal pressure has been reached, the control terminal maintains the normal downward pressure of the lowering cylinder to maintain the clamping operation. The control terminal of this solution can be a computer program control terminal or a CNC control terminal. The sliding setting of the bearing seat 7 can be a slide rail or an embedded sliding setting. In this solution, the air pump and the first pressure sensor, the second pressure sensor 705 and the first and second acting cylinders 703 are connected externally through air pressure conduits. The external location can be the ground or other positions on the machine tool. Because the required pressure displacement range is small, it will not have an impact on the position distance.

[0043] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A swing angle clamp, comprising a bed body (1), a support cylinder (2), a triangular swing arm (3), a clamp bracket (4), a pressing cylinder (5), a clamping rocker arm (6), and a bearing seat (7), characterized in that... The clamp bracket (4) is located on the upper side of the bed body (1). The lower part of the support cylinder (2) is hinged to the lower part of the clamp bracket (4). The middle part of the triangular swing arm (3) is hinged to the upper part of the clamp bracket (4). The front end of the support cylinder (2) is hinged to the rear part of the triangular swing arm (3). The pressing cylinder (5) is located at the upper front part of the triangular swing arm (3). The telescopic rod of the pressing cylinder (5) passes through the front part of the triangular swing arm (3) and its lower end is hinged to the upper part of the pressing rocker arm (6). The bearing seat (7) is slidably located at the front and rear parts of the upper end of the bed body (1). The pressing rocker arm (6) has a first-acting cylinder (601) in the middle of its interior. The cylinder (601) is connected to a first air pump (603) via a solenoid valve, and the first acting cylinder (601) is connected to a first pressure sensor (602). A pad (701) is inclinedly provided in the middle of the support seat (7), and a placement space is provided in the middle of the support seat (7). A contact seat (702) is provided at the lower part of the pad (701), and the contact seat (702) is inserted into the placement space. A second acting cylinder (703) is provided at the bottom of the placement space of the support seat (7). The second acting cylinder (703) is connected to a second air pump (704) via a solenoid valve, and the second acting cylinder (703) is connected to a second pressure sensor (705). The first pressure sensor (602) and the second pressure sensor (705) of the first and second acting cylinders (601 and 703) are electrically connected to the control terminal. The control terminal is electrically connected to the pressing cylinder (5). At least two sets of bearing seats (7) are provided at the front and rear of the upper end of the bed body (1), which are arranged side by side at the upper end of the bed body (1). Each set of bearing seats (7) is provided with at least two sets of bearing parts, and the placement space is located in the middle of the bearing parts. At least one set of second acting cylinders (703) is provided inside each set of bearing parts, and each set of second acting cylinders (703) is connected to an independent second pressure sensor (705). The pad (701) is inclinedly arranged at the upper end of the bearing part to press. The rocker arm (6) is provided with at least two sets of curved pressing spaces. Each curved pressing space is provided with at least one set of first action cylinders (601) at the top center. The lower end of the first action cylinder (601) is connected to a pressure plate (605). The length of the pressure plate (605) is the same as the length of the pressing rocker arm (6). Buffer springs (604) are provided between the two ends of the pressure plate (605) and the pressing rocker arm (6). Each set of first action cylinders (601) is connected to an independent first pressure sensor (602). The length of the pressing rocker arm (6) is the same as the distance between the front and rear bearing seats (7) of the bed body (1). The upper end of the triangular swing arm (3) is provided with an alarm light (301) and a buzzer (302).

2. The clamping and adjustment method of the swing angle clamp according to claim 1, characterized in that... Includes the following steps: S1: The second air pump (704) is started through the control terminal to inflate the second working cylinder (703), and the lower limit of the range of the second pressure sensor (705) is set at the same time. When the lower limit value of the range of the second pressure sensor (705) is reached, the solenoid valve is closed through the control terminal and the clamping part is placed into the carrier seat (7). S2: Start the support cylinder (2) through the control terminal to move the triangular swing arm (3) above the clamping part, start the first air pump (603) through the control terminal to inflate the first action cylinder (601), and set the lower limit of the range of the first pressure sensor (602). When the lower limit value of the range of the first pressure sensor (602) is reached, close the solenoid valve through the control terminal. S3: The lowering cylinder (5) is started through the control terminal. At the same time, the control terminal detects the transmission values ​​of the first pressure sensor (602) and the second pressure sensor (705) and controls the lowering cylinder (5) in conjunction. The measurement and calculation formulas of the first pressure sensor (602) and the second pressure sensor (705) are as follows: Where P represents the actual pressure value, Vr represents the sensor output current, Pmax represents the upper limit of the pressure sensor range, and Pmin represents the lower limit of the pressure sensor range.

3. The clamping adjustment method according to claim 2, characterized in that... The output current of the first pressure sensor (602) and the second pressure sensor (705) is constant.

4. The clamping adjustment method according to claim 2, characterized in that... The actual pressure value is the pressure value inside the first acting cylinder (601) and the second acting cylinder (703).

5. The clamping adjustment method according to claim 2, characterized in that... The upper limit of the pressure sensor's range is the maximum upper limit value set by the control terminal.

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