Turnover clamp device

Abstract

The utility model discloses a turnover clamp device, which is characterized by comprising a frame, a clamping device and a clamping device, the at least two rotating shafts are arranged on the frame in parallel, and the end parts of the rotating shafts are connected with clamps for clamping workpieces; the sliding plate is arranged in the frame, can slide in the length direction of the frame and is provided with a rack; the gear is fixed on the rotating shaft and is in meshing transmission with the rack; the driving shaft rod is connected with the sliding plate, and the air cylinder or the cam mechanism drives the shaft rod to move linearly. In this way, 180-degree automatic overturning of the clamped workpiece is achieved, and the deep hole machining efficiency and coaxiality are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of cold heading processing equipment, in particular to a rotatable clamp device for forming parts with holes such as nuts, and is especially applicable to the clamping mechanism of a cold heading machine that requires two-way deep hole processing. Background Art

[0002] When processing parts with holes on a cold heading machine, traditional clamp devices usually adopt a fixed clamping structure, and it is necessary to punch the workpiece unidirectionally multiple times to complete hole processing. Due to the excessive stroke of the punch rod protruding during punching, it is extremely easy to break and malfunction, and it is also easy to cause low production efficiency and poor positioning accuracy. Therefore, although there are some rotatable clamp designs in the prior art, there are problems such as complex structure, unstable flipping angle, and easy wear of transmission components, and it is difficult to meet the high-precision requirements of deep hole forming for high-speed cold heading machines. Summary of the Utility Model

[0003] To solve the above problems, a clamp device that can accurately achieve 180° rotation is provided. Through a slide plate - rack - gear linkage mechanism, the automatic flipping of the clamped workpiece is realized, and the deep hole processing efficiency and coaxiality are improved.

[0004] To achieve the above object, the utility model provides the following technical solution: A rotatable clamp device includes

[0005] ‌Frame‌: The main support structure, provided with a rotating shaft installation hole and a slide plate guide groove;

[0006] ‌Rotating shaft assembly‌: At least two parallel rotating shafts, with clamps fixedly connected to the ends, and gears installed on the rotating shafts;

[0007] ‌Slide plate mechanism‌: A slide plate that can reciprocate along the frame, with a rack meshing with the gear on its surface, and a drive shaft rod connected to the end of the slide plate;

[0008] ‌Drive unit‌: Drives the linear motion of the slide plate through a cylinder or a cam mechanism, and the rack drives the gear to rotate, so that the clamp accurately flips 180°;

[0009] ‌Clamp‌: Provided with a V-shaped clamping groove, with elastic elements inside to adapt to different workpiece sizes, and the clamp is installed on the rotating shaft.

[0010] ‌Among them, the rack and the gear adopt involute gears with a module of 1.5 - 2.5 and the number of teeth is configured as 20 teeth to ensure accurate 180° indexing;

[0011] Linear guide rails are arranged on both sides of the slide plate, and guide grooves are provided in the frame to limit the movement track of the slide plate;

[0012] The drive shaft rod is connected to the piston rod of the cylinder through a universal joint to compensate for installation errors;

[0013] The clamping head is embedded with a cemented carbide gasket to improve wear resistance;

[0014] Proximity sensors are installed on the side wall of the frame to detect the end position of the skateboard stroke.

[0015] The beneficial effects of the present utility model are as follows:

[0016] 1. The rack and pinion drive is combined with the linear drive of the skateboard to achieve a high-precision 180° flip, with a small coaxiality error of the hole positions;

[0017] 2. The modular design allows for adapting to multi-station cold heading machines by increasing or decreasing the number of rotating shafts;

[0018] 3. The skateboard guiding structure reduces component wear and extends the service life by more than 3 times;

[0019] In this way, the 180° automatic flip of the clamped workpiece is realized, improving the deep hole processing efficiency and coaxiality.

[0020] The following further describes the present utility model in conjunction with the drawings and specific embodiments. Description of the Drawings

[0021] Figure 1 Is a three-dimensional view of the specific embodiment of the present utility model;

[0022] Figure 2 Is a partial three-dimensional view of the specific embodiment of the present utility model.

[0023] In the figure, 1 is the frame; 2 is the rotating shaft; 3 is the skateboard; 4 is the clamp; 41 is the V-shaped clamping groove; 5 is the shaft rod; 6 is the rack; 7 is the gear. Specific Embodiment

[0024] The following specifically describes the present utility model through examples, which are only used for further illustration of the present utility model and cannot be construed as limiting the protection scope of the present utility model.

[0025] As Figure 1 、 Figure 2 shown, this embodiment discloses a flipable clamp device, including

[0026] ‌Frame 1‌: The main support structure, provided with a rotating shaft 2 installation hole and a skateboard 3 guiding groove;

[0027] ‌Rotating shaft assembly‌: At least two parallel rotating shafts 2, the rotating shafts 2 are evenly distributed at a certain interval, and the clamp 4 is fixedly connected to their ends, and the gear 7 is installed on the rotating shaft 2;

[0028] ‌Skateboard mechanism‌: A skateboard 3 that can reciprocate along the frame 1, with a rack 6 meshing with the gear 7 on its surface, and the end of the skateboard 3 is connected to the drive shaft rod 5;

[0029] Driving unit (not shown in the figure): drives the slide plate 3 to move linearly through a cylinder or a cam mechanism, and the rack 6 drives the gear 7 to rotate, so that the clamp 4 is accurately flipped 180°. If a cam mechanism is adopted, the structure of the cam mechanism includes a motor and a cam, the shaft 5 is abutted against the peripheral wall of the cam through a return spring, and the output shaft of the motor is drivingly connected to the cam;

[0030] ‌Clamp 4‌: It is provided with a V-shaped clamping groove 41, which makes it more convenient and reliable to clamp and process the hexagonal nut workpiece, and the V-shaped clamping groove 41 has a built-in elastic element to adapt to different workpiece sizes. The clamp 4 is installed on the rotating shaft 2.

[0031] ‌Wherein, the rack 6 and the gear 7 use an involute gear 7 with a module of 1.5-2.5 and a configuration of 20 teeth to ensure 180° precise indexing;

[0032] Linear guide rails are arranged on both sides of the slide plate 3, and guide grooves are arranged in the frame 1 to limit the movement trajectory of the slide plate 3;

[0033] The drive shaft 5 is connected to the cylinder piston rod through a universal joint to compensate for installation errors;

[0034] The head of the clamp 4 is embedded with a carbide liner to improve wear resistance;

[0035] A proximity sensor is installed on the side wall of the frame 1 to detect the end point position of the travel of the slide plate 3.

[0036] Among them, frame 1 is made of QT500 casting, with a 25mm wide guide groove machined inside;

[0037] The diameter of shaft 2 is 20 mm, and a 6204 deep groove ball bearing is installed. The module of gear 7 (103) is 2, and the number of teeth is 20;

[0038] The length of the slide plate 3 is 300 mm, the surface of the slide plate 3 is milled with a rack 6, and the travel of the rack 6 is 50 mm;

[0039] The cylinder is SMC CJ2B16-50, connected to the drive shaft 5 (107) through a pin shaft;

[0040] The head of the clamp 4 is provided with a 0.8 mm thick tungsten carbide lining, and the clamping force is ≥ 200N.

[0041] Workflow:

[0042] Initial position: the clamp 4 holds the workpiece in a positive direction, and the punch processes the first half of the hole;

[0043] The cylinder extends: driving the slide plate 3 to move right, and the rack 6 drives the gear 7 to rotate half a circle (180°);

[0044] Processing position: the clamp 4 is turned over and positioned, and then the remaining half hole is processed with a punch;

[0045] Cylinder retraction: The slide plate 3 resets to prepare for the next flip.

[0046] Adopting the above technical solution,

[0047] 1. The rack 6 and the gear 7 are in transmission cooperation to linearly drive the slide plate 3, achieving a high-precision 180° flip with a small coaxiality error of the hole positions;

[0048] 2. Modular design, which can adapt to multi-station cold heading machines by increasing or decreasing the number of rotating shafts 2;

[0049] 3. The guiding structure of the slide plate 3 reduces component wear and extends the service life by more than 3 times;

[0050] In this way, the 180° automatic flip of the clamped workpiece is realized, improving the deep hole processing efficiency and coaxiality.

[0051] The above shows and describes the basic principles, main features and advantages of the present invention. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0052] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A reversible clamp device, characterized in that: include: frame; At least two rotating shafts are arranged in parallel on the frame, and the ends of the rotating shafts are connected with clamps for clamping the workpiece; A slide plate is arranged in the frame, the slide plate can slide along the length direction of the frame and is provided with a rack; A gear fixed on the rotating shaft, the gear meshing with the rack for transmission; A driving shaft connected to the slide plate, and a cylinder or cam mechanism that drives the shaft to move linearly.

2. The reversible clamp device according to claim 1, characterized in that: The number of teeth of the gear is 20, and the rack stroke length is equal to half of the circumference of the gear pitch circle.

3. The reversible clamp device according to claim 1, characterized in that: Linear guide rails are arranged on both sides of the slide plate, and guide grooves are arranged correspondingly on the inner wall of the frame.

4. The device according to claim 1, characterized in that The clamping surface of the clamp is provided with a replaceable hard alloy lining.

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