Please select the most similar patent number from A, B, C and D. Which number is?
Disclosed is a novel pipe cutting apparatus, comprising a clamping device, the clamping device comprising a frame which is provided with a clamping assembly provided with clamping claws and a mounting base, the clamping claw comprising a first clamping claw and a second clamping claw. The apparatus further comprises a feeding device, the feeding device comprising a table which is fixedly provided with a first-stage fixing frame, a second-stage fixing frame, and a third-stage fixing frame, and the second-stage fixing frame being disposed between the first-stage fixing frame and the third-stage fixing frame. The novel pipe cutting apparatus provided in the present invention comprises the clamping device and the feeding device, so that the structure is simple and reasonable, and maintaining is convenient. Pipes can be clamped by means of movements of an air cylinder, and the pipes are pushed to the pipe cutting apparatus by means of electrically lifting and lowering, thereby increasing the production efficiency and reducing labor intensity of operators.
A: Disclose are a pin position adjusting device and a drilling machine. The pin position adjusting device comprises a bottom plate (1), a first adjusting mechanism (2) and a second adjusting mechanism (3). The first adjusting mechanism (2) and the second adjusting mechanism (3) are movably arranged on the bottom plate (1). The first adjusting mechanism (2) comprises a first mounting plate group (21) and a first clamping assembly (22), wherein the first mounting plate group (21) is provided with a first positioning slot (210), a first pin (100) is inserted into the first positioning slot (210), and a clamping end of the first clamping assembly (22) can cooperate with a side wall of the first positioning slot (210) to clamp and fix the first pin (100). The second adjusting mechanism (3) comprises a second mounting plate group (31) and a second clamping assembly (32), wherein a second pin (200) is inserted between a side wall of the second mounting plate group (31) and a clamping end of the second clamping assembly (32), and the clamping end of the second clamping assembly (32) can cooperate with the side wall of the second mounting plate group (31) to clamp and fix the second pin (200).
B: Disclosed is a clamping device for multifunctional key groove milling, the clamping device comprising a clamping device body, one or two indexers and a plurality of pressing devices. The clamping device body is composed of a body 1 (1) and a body 2 (8), the body 1 and the body 2 are connected by means of a connection member, a spring (3) is arranged in the connection member, and the body 1 is fixed to a workbench. The indexer is composed of a fixing base (6) and an indexing block (5), the fixing base is connected to the clamping device body 1, a plurality of indexing holes are provided in the fixing base, an indexing pin is arranged on the indexing block, and the indexing block is connected to a workpiece. The pressing device is composed of a connection plate (10), a pressing plate (11) and an air cylinder (2), the connection plate and the pressing plate are connected by means of a connection member (9) and fixed to one side of the clamping device body 1, the air cylinder is fixed to the other side of the clamping device body 1, and an air cylinder ejector rod penetrates a hole provided in the clamping device body 1 and is in contact with the pressing plate. The problems in the background art of deformation being generated, machining quality being affected, and one end being unable to penetrate due to the fact that a shaft is long and thin are solved.
C: A metal tube processing device, comprising a clamping apparatus and a cutting apparatus. The clamping apparatus is arranged at one side of a metal tube, and is used for clamping one end of the metal tube and driving the metal tube to move along the axial direction of the metal tube. The cutting apparatus comprises a first blade block, a second blade block, a first slide block, a second slide block, a first cylinder and a second cylinder. The first slide block is arranged at one side of the metal tube, the second slide block is arranged at the other side of the metal tube, and an upper surface of the first slide block is in contact with a lower surface of the second slide block. The first blade block is fixedly arranged at the end of the first slide block near to the metal tube, and the second blade block is fixedly arranged at the end of the second slide block near to the metal tube. The first cylinder is connected to the first slide block, and used for driving the first slide block to clamp the other end of the metal tube. The second cylinder is connected to the second slide block, and used for driving the second slide block to move horizontally, so as to cut the metal tube and obtain a metal tube having a preset length. The metal tube processing device increases production efficiency and yield.
D: An integrated steel section material storage apparatus, comprising a material input end and a material output end. A plurality of pinch roller apparatuses are arranged at intervals between the material input end and the material output end. The pinch roller apparatuses comprise a frame, the frame is provided with first pinch rollers and second pinch rollers which are rotatably arranged at intervals, the first pinch rollers and the second pinch rollers are connected to a rotary drive assembly, and the first pinch rollers are provided with compression drivers, used for driving the first pinch rollers and the second pinch rollers to clamp a steel section, at both ends. A top portion of the frame is provided with material pressing apparatuses, used for compressing the steel section, between adjacent pinch roller apparatuses, and a bottom portion of the frame is provided with steel section conveying rollers between the first vertical pinch rollers and the second vertical pinch rollers.
Answer: C