An apparatus for making temporary road mats characterized by multiple layers of mutually perpendicular elongated timbers having an array of vertical intersections aligned in lateral rows. The apparatus includes a gang drill that moves relative to a roughly assembled mat for sequentially drilling the lateral rows of intersections.
The invention relates to a door plate processing instrument, and particularly relates to a door body clamping device. The door body clamping device comprises a motor, four pressing plates in all, and a gear shaft, wherein the four resisting plates are used for pressing against a door body; one side of each pressing plate toward the adjacent side edge is a resisting surface; a rack of which the length direction is perpendicular to the resisting surface of each pressing plate is fixedly arranged below the pressing plate; the gear shaft is arranged below the door body; the racks which are respectively connected with the pressing plates with opposite positions are respectively arranged at two opposite sides of the gear shaft; the resisting plates and the racks form clamping function members; the clamping function members take the gear shaft as the center point and are in point symmetry distribution; the racks are meshed with the gear shaft; and the motor is fixedly connected with the lower end of the gear shaft or the motor is connected with the gear shaft through a transmission mechanism. The defect that the clamping device in the prior art cannot clamp from four surfaces is overcome; and the door body clamping device capable of automatically resetting is provided.
A rotatable tool for chip removing machining having a rotatable holder part and a cutting part that is detachably connected to a front end of the holder part. In a front end portion of the holder part, a forwardly open slot is formed, which separates two elastically flexible branches of the holder part. For clamping of the cutting part on the holder part, a male / female coupling is arranged, which comprises a centrical, male-like pin on one of the parts and a corresponding seat in the other part. Disposed on the holder part radially outside of the male / female coupling are thrust load carrying support surfaces, which surfaces are at least partially conical and are engaged by corresponding support surfaces of the cutting part. During a cutting operation, axial thrust loads transmitted to the axial thrust support surfaces cause the branches to be pressed in a direction intensifying the radial contact between the pin and the seat.
The invention discloses a diamond compact, which comprises a hard alloy substrate and a diamond polycrystalline layer connected onto the upper end face of the hard alloy substrate, wherein the hard alloy substrate is integrated with the diamond polycrystalline layer to integrally form a cylinder shape, and the hard alloy substrate is made of hard alloy containing 2%-13% of cobalt. The invention further discloses a manufacturing process for the diamond compact. Abrasion resistance of the diamond compact is improved by reducing the cobalt content in the hard alloy of the hard alloy substrate, so that the service life of the diamond compact is prolonged.
The invention discloses a furniture punching and cutting integrative machine. The integrative machine comprises a base; a buffer layer is arranged under the base; two supporting frames are arranged in the middle of the base; the two supporting frames are the same in height; a supporting frame platform is arranged on the supporting frames; the two ends of the supporting frame platform are connected with a punching supporting arm and a cutting supporting arm respectively; a motor is arranged on the supporting frame platform; a cutting head is arranged at the lower end of the cutting supporting arm; a cutting knife is arranged on the cutting head; the punching supporting arm is connected with a punching device; a drilling head is arranged under the punching device; a pneumatic press machine is arranged on the punching machine. The integrative machine has the beneficial effects that the integrative machine is high in working efficiency, and neat in cutting; the punched holes are free from deforming.