Positioning and rotating clamp for finish machining of metal casting

Abstract

The utility model discloses a positioning and rotating clamp for finish machining of metal castings, belongs to the technical field of clamp devices, and aims to provide a positioning and rotating clamp for finish machining of metal castings, which is more convenient to use. The tail ends of all the swing pieces are movably connected with the same tray through connecting rods, a driver is fixedly connected to the bottom of the configuration frame, the output end of the driver is fixedly connected with the tray, a multi-edge clamping block is rotationally connected to each swing piece, and the rotating axis of all the multi-edge clamping blocks is parallel to the axis of the tray. The swing part comprises a swing arm, one end of the swing arm is matched with the fixed shaft to form a rotating pair, and the other end of the swing arm is provided with a bent arm. The rotatable tray is designed to drive the swing arm and the connecting rod assembly, and the multi-edge clamping block structure is arranged on the swing arm, so that the clamp can quickly clamp and release, the use is more convenient, and the finish machining efficiency can be improved.

Description

Technical Field

[0001] This application relates to the field of clamping device technology, and in particular to a positioning rotary clamping fixture for precision machining of metal castings. Background Technology

[0002] Fixtures are essential working mechanisms for metal processing. Traditional fixtures use manual methods to complete clamping and releasing actions, which is time-consuming. Especially for heavy metal castings, changing workpieces each time is troublesome and greatly affects the efficiency of finishing. Summary of the Invention

[0003] The purpose of this application is to provide a more convenient positioning and rotating fixture for the precision machining of metal castings.

[0004] To achieve the above objectives, this application provides a positioning rotary fixture for precision machining of metal castings: it includes a mounting frame, on which a plurality of swinging members are rotatably connected, and the ends of all the swinging members are movably connected to the same tray via connecting rods. A driver is fixedly connected to the bottom of the mounting frame, and the output end of the driver is fixedly connected to the tray. Each swinging member is rotatably connected to a multi-ribbed clamping block, and the rotation axis of all the multi-ribbed clamping blocks is parallel to the axis of the tray, for applying pressure to the outer surface of the metal casting to maintain the stability of the metal casting.

[0005] As a preferred embodiment, the configuration frame includes a horizontal frame with a fixed shaft on the lower surface of the corner of the horizontal frame. The swinging component includes a swing arm, one end of which cooperates with the fixed shaft to form a rotating pair, and the other end of which has a bent arm. The two ends of the connecting rod are rotatably connected to the tray and the bent arm, respectively. This linkage structure can use rotational motion to complete the clamping and releasing actions.

[0006] As a preferred embodiment, the lower surface of the tray has a plurality of traction shafts, the number of which corresponds to the number of fixed shafts. The traction shafts and fixed shafts are equidistantly arranged around the axis of the driver output shaft. The traction shafts cooperate with one end of the connecting rod to form a revolute joint. The end of the bent arm away from the swing arm has a connecting shaft, which cooperates with the other end of the connecting rod to form a revolute joint, thus ensuring the degree of freedom of movement of each component of the transmission mechanism.

[0007] As a preferred embodiment, the lower end of the fixed shaft passes through the swing arm and is fixedly connected to a first retaining ring, the lower end of the connecting shaft passes through the connecting rod and is fixedly connected to a second retaining ring, and the lower end of the traction shaft passes through the connecting rod and is fixedly connected to a third retaining ring, thereby ensuring the stable connection of each component of the transmission mechanism.

[0008] As a preferred embodiment, the edge of the horizontal frame has a vertical frame, and a mounting bracket is connected between the bottom of the opposite sidewalls of the vertical frame. The driver includes a motor and a reducer fixedly connected to the mounting bracket. The output end of the reducer is fixedly connected to the tray. The outer side of the vertical frame also has a connecting plate, which can be placed on a workbench or frame, and then the entire fixture is fixed with bolts.

[0009] As a preferred embodiment, the multi-faceted clamping block has a shaft hole that passes through the upper and lower end faces, and the upper surface of the transition between the swing arm and the bent arm has a pressure shaft that is suitable for passing through the shaft hole to form a rotating pair, so that the multi-faceted clamping block can adaptively turn when it contacts the outer surface of the metal casting.

[0010] As a preferred embodiment, the upper end of the pressure shaft passes through the shaft hole and is fitted with a connector. The upper end of the pressure shaft has an internal threaded hole. The connector includes a screw rod adapted to engage with the internal threaded hole. The upper end of the screw rod has a limiting ring. The diameter of the limiting ring is larger than the inner diameter of the shaft hole, which inhibits the multi-faceted clamping block from moving up and down outside the pressure shaft.

[0011] As a preferred embodiment, the outer side of the multi-faceted clamping block has multiple planes, and each plane is provided with several friction strips to avoid hard contact between the multi-faceted clamping block and the outer surface of the metal casting, while improving the contact friction force.

[0012] Compared with the prior art, the beneficial effects of this application are as follows:

[0013] (1) By designing a rotatable tray to drive the swing arm and linkage assembly, and setting a multi-ribbed clamping block structure on the swing arm, the clamp can achieve quick clamping and release actions, making it more convenient to use and improving the efficiency of metal finishing.

[0014] (2) By designing a multi-sided clamping block structure with multiple outer sides and rotating the multi-sided clamping block with the swing arm, the multi-sided clamping block can make adaptive angle adjustment when it contacts the outer side of the metal casting, so as to contact the outer side of the metal casting with a larger side area. Combined with the rubber friction strip structure on the surface, stable clamping constraint can be achieved. Attached Figure Description

[0015] Figure 1 This is a first three-dimensional schematic diagram of the overall structure of the positioning and rotating fixture used for precision machining of the metal casting.

[0016] Figure 2 This is a second three-dimensional schematic diagram of the overall structure of the positioning and rotating fixture used for precision machining of the metal casting.

[0017] Figure 3 This is a first three-dimensional structural diagram showing the connection between the swinging component and the driver of a positioning rotary fixture for precision machining of the metal casting.

[0018] Figure 4 This is a schematic diagram of the second three-dimensional structure of the oscillating component of the positioning rotary fixture for precision machining of the metal casting, connected to the driver.

[0019] Figure 5 A three-dimensional structural diagram of the multi-ribbed clamping block, the swinging component, and the connecting rod in the positioning rotary fixture for precision machining of the metal casting.

[0020] Figure 6 This is a three-dimensional structural diagram of the connecting rod and the actuator of the positioning rotary fixture used for precision machining of the metal casting.

[0021] Figure 7 This is a three-dimensional structural diagram of the connecting rod of the positioning rotary fixture used for precision machining of the metal casting.

[0022] Figure 8 This is a three-dimensional structural diagram of the swinging component of the positioning rotary fixture used for precision machining of the metal casting.

[0023] Figure 9 This is a three-dimensional structural diagram of the multi-ribbed clamping block of the positioning rotary fixture used for precision machining of the metal casting.

[0024] Figure 10 A three-dimensional structural diagram of the connecting component of the positioning rotary fixture used for precision machining of the metal casting.

[0025] Figure 11 This is a first three-dimensional structural diagram of the mounting frame for the positioning rotary fixture used for the precision machining of the metal casting.

[0026] Figure 12 This is a second three-dimensional structural diagram of the mounting frame for the positioning rotary fixture used for the precision machining of the metal casting.

[0027] In the diagram: 1. Configuration frame; 101. Horizontal frame; 102. Vertical frame; 103. Fixed shaft; 104. First retaining ring; 105. Mounting frame; 106. Connecting plate; 2. Swing component; 201. Swing arm; 202. Bent arm; 203. Pressure shaft; 204. Internal threaded hole; 205. Connecting shaft; 206. Second retaining ring; 3. Multi-ribbed clamping block; 301. Shaft hole; 302. Friction strip; 4. Connecting rod; 5. Driver; 501. Motor; 502. Reducer; 6. Tray; 601. Traction shaft; 602. Third retaining ring; 7. Connecting component; 701. Screw; 702. Limiting ring. Detailed Implementation

[0028] The present application will be further described below with reference to specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0029] In the description of this application, it should be noted that the directional terms such as "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. They should not be construed as limiting the specific protection scope of this application.

[0030] It should be noted that the terms "first," "second," etc., in the specification and claims of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0031] The terms “comprising” and “having”, and any variations thereof, in the specification and claims of this application are intended to cover non-exclusive inclusion, for example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or device.

[0032] like Figure 1-12 The positioning and rotating fixture for precision machining of metal castings shown includes a fixedly mounted mounting frame 1. The mounting frame 1 is rotatably connected to several swinging components 2, typically four in number. The mounting frame 1 includes a horizontal frame 101, which is square. The lower surface of the four corners of the horizontal frame 101 has a fixed shaft 103. The swinging component 2 includes the longest swing arm 201. One end of the swing arm 201 cooperates with the fixed shaft 103 to form a rotating pair. The lower end of the fixed shaft 103 passes through the swing arm 201 and is fixedly connected to a first retaining ring 104 to prevent the swing arm 201 from disengaging from the fixed shaft 103. The other end of the swing arm 201 has a bent arm 202. The bent arm 202 is no longer on the same straight line as the swing arm 201. The line connecting the ends of the swing arm 201 and the bent arm 202 forms a triangle with the swing arm 201 and the bent arm 202 themselves, which facilitates the application of a swinging deflection force to the swinging component 2.

[0033] All the ends of the swinging parts 2 are movably connected to the same tray 6 via the connecting rod 4. In fact, the two ends of the connecting rod 4 are rotatably connected to the tray 6 and the bent arm 202 respectively. Specifically, the lower surface of the tray 6 has several traction shafts 601. The number of traction shafts 601 corresponds to the number of fixed shafts 103, which is four in each case. Therefore, the number of connecting rods 4 is also four. The traction shafts 601 and the fixed shafts 103 are equidistantly arranged around the axis of the output shaft of the driver 5. The traction shaft 601 and one end of the connecting rod 4 cooperate to form a rotating pair. The lower end of the traction shaft 601 passes through the connecting rod 4 and is fixedly connected to a third retaining ring 602 to prevent the connecting rod 4 from disengaging from the traction shaft 601. The end of the bent arm 202 away from the swing arm 201 has a connecting shaft 205. The connecting shaft 205 cooperates with the other end of the connecting rod 4 to form a rotating pair. The lower end of the connecting shaft 205 passes through the connecting rod 4 and is fixedly connected to a second retaining ring 206 to prevent the connecting rod 4 from disengaging from the connecting shaft 205 and to ensure smooth transmission.

[0034] A driver 5 is fixedly connected to the bottom of the mounting frame 1. The output end of the driver 5 is fixedly connected to the tray 6. The edge of the horizontal frame 101 has a rectangular vertical frame 102 extending downward. A mounting bracket 105 is connected between the bottom of the opposite side walls of the vertical frame 102. The mounting bracket 105 is parallel to the horizontal frame 101. The driver 5 includes a motor 501 and a reducer 502 fixedly connected to the mounting bracket 105. The output end of the motor 501 is connected to the input end of the reducer 502. The output end of the reducer 502 is fixedly connected to the tray 6 to provide a large torque to the tray 6. The outer side of the vertical frame 102 also has a horizontal connecting plate 106, which is parallel to the plane of the horizontal frame 101 and can be fixed to the workbench using bolts or other connecting parts 7.

[0035] Each swinging component 2 is rotatably connected to a multi-faceted clamping block 3. The outer side of the multi-faceted clamping block 3 has multiple planes, requiring at least three planes, and each plane has the same size, so it is usually a regular triangular prism. Each plane of the multi-faceted clamping block 3 is provided with several friction strips 302, which are made of rubber material. The rotation axis of all multi-faceted clamping blocks 3 is parallel to the axis of the tray 6. In order to achieve a stable rotational connection, the multi-faceted clamping block 3 has a shaft hole 301 that passes through the upper and lower end faces. The axis of the shaft hole 301 is parallel to the geometric center line of the multi-faceted clamping block 3. The upper surface of the transition between the swing arm 201 and the bent arm 202 has a pressure shaft 203, which is used to pass through the shaft hole 301 to form a rotating pair. The upper end of the pressure shaft 203 passes through the shaft hole 301 and is fitted with a connector 7. The upper end of the pressure shaft 203 has an internal threaded hole 204. The connector 7 includes a screw 701, which is used to cooperate with the internal threaded hole 204. The upper end of the screw 701 also has a larger limiting ring 702. The diameter of the limiting ring 702 is larger than the inner diameter of the shaft hole 301, which is used to prevent the multi-ribbed clamp 3 from moving up and down outside the pressure shaft 203.

[0036] Working principle: In the initial state, the angle between the connecting rod 4 and the swinging component 2 is small, and all the multi-ribbed clamping blocks 3 are far away from the tray 6. The space around the tray 6 is relatively large. When needed, the non-machined surface of the metal casting is placed on the tray 6 with the non-machined surface facing down. Then, the driver 5 is started, which drives the tray 6 to rotate, making all the connecting rods 4 closer to the axis of the tray 6. The angle between each group of connecting rods 4 and the swinging component 2 increases, and all the multi-ribbed clamping blocks 3 synchronously approach the metal casting on the tray 6 until the outer surface of the multi-ribbed clamping block 3 contacts the outer surface of the metal casting and the friction strip 302 presses against the outer surface of the multi-ribbed clamping block 3. Under the constraint of the multi-ribbed clamping blocks 3, the metal casting remains stable on the tray 6, and then it can be precision machined on the metal casting. After the metal casting is machined, the driver 5 is controlled to drive the tray 6 to rotate in the opposite direction, so that all the multi-ribbed clamping blocks 3 move away from each other and release the metal casting. The machined metal casting can then be removed from the tray 6.

[0037] The basic principles, main features, and advantages of this application have been described above. Those skilled in the art should understand that this application is not limited to the above embodiments. The embodiments and descriptions in the specification are merely the principles of this application. Various changes and modifications can be made to this application without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection claimed by this application is defined by the appended claims and their equivalents.

Claims

1. A positioning rotary fixture for precision machining of metal castings, characterized in that: The device includes a configuration frame (1), which is rotatably connected to several swinging parts (2). The ends of all the swinging parts (2) are movably connected to the same tray (6) via a connecting rod (4). A driver (5) is fixedly connected to the bottom of the configuration frame (1). The output end of the driver (5) is fixedly connected to the tray (6). Each swinging part (2) is rotatably connected to a multi-ribbed clamping block (3). The rotation axis of all the multi-ribbed clamping blocks (3) is parallel to the axis of the tray (6).

2. The positioning and rotating fixture for precision machining of metal castings as described in claim 1, characterized in that: The configuration frame (1) includes a horizontal frame (101), and the lower surface of the corner of the horizontal frame (101) has a fixed shaft (103). The swing member (2) includes a swing arm (201), one end of which cooperates with the fixed shaft (103) to form a rotating pair, and the other end has a bent arm (202). The two ends of the connecting rod (4) are rotatably connected to the tray (6) and the bent arm (202) respectively.

3. The positioning and rotating fixture for precision machining of metal castings as described in claim 2, characterized in that: The lower surface of the tray (6) has a plurality of traction shafts (601), the number of which corresponds to the number of fixed shafts (103). The traction shafts (601) and the fixed shafts (103) are arranged equidistantly around the axis of the output shaft of the driver (5). The traction shafts (601) cooperate with one end of the connecting rod (4) to form a rotating pair. The end of the bent arm (202) away from the swing arm (201) has a connecting shaft (205), and the connecting shaft (205) cooperates with the other end of the connecting rod (4) to form a rotating pair.

4. The positioning and rotating fixture for precision machining of metal castings as described in claim 3, characterized in that: The lower end of the fixed shaft (103) passes through the swing arm (201) and is fixedly connected to the first retaining ring (104). The lower end of the connecting shaft (205) passes through the connecting rod (4) and is fixedly connected to the second retaining ring (206). The lower end of the traction shaft (601) passes through the connecting rod (4) and is fixedly connected to the third retaining ring (602).

5. The positioning and rotating fixture for precision machining of metal castings as described in claim 4, characterized in that: The edge of the horizontal frame (101) has a vertical frame (102), and a mounting bracket (105) is connected between the bottom of the opposite sidewalls of the vertical frame (102). The driver (5) includes a motor (501) and a reducer (502) fixedly connected to the mounting bracket (105). The output end of the reducer (502) is fixedly connected to the tray (6). The outer side of the vertical frame (102) also has a connecting plate (106).

6. The positioning and rotating fixture for precision machining of metal castings as described in any one of claims 2 to 5, characterized in that: The multi-faceted clamp (3) has a shaft hole (301) that passes through the upper and lower end faces. The upper surface of the transition between the swing arm (201) and the bent arm (202) has a pressure shaft (203) that is suitable for passing through the shaft hole (301) to form a rotating pair.

7. The positioning rotary fixture for precision machining of metal castings as described in claim 6, characterized in that: The upper end of the pressure shaft (203) passes through the shaft hole (301) and is fitted with a connector (7). The upper end of the pressure shaft (203) is provided with an internal threaded hole (204). The connector (7) includes a screw (701) adapted to cooperate with the internal threaded hole (204). The upper end of the screw (701) has a limiting ring (702). The diameter of the limiting ring (702) is larger than the inner diameter of the shaft hole (301).

8. The positioning and rotating fixture for precision machining of metal castings as described in claim 6, characterized in that: The outer side of the multi-faceted clamping block (3) has multiple planes, and the multi-faceted clamping block (3) is provided with a number of friction strips (302) in each of the planes.

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