SU657983A1 - Sand-blasting unit head - Google Patents

Description

The invention relates to the field of surface treatment of products using abrasive particles and can be used in various sectors of the national economy, which require treatment of internal surfaces of products, mainly pipes, for example, before polishing or after heat treatment to remove scale, rust, etc.

Sandblasting heads are known for treating the inner surface of the products, which simultaneously process four pipes located in two rows of plates.

The pipes to be processed are installed in the sockets of the plate that are screwed onto the body to the maximum tightening torque. This force is transmitted through the bushing bushing to elastic elements, which are deformed and compress the pipes diametrically.

The disadvantage of this design is the reliable fixation of the products in the head.

The arrangement of nests in two rows creates comforts when loading and unloading pipes (the need to shift the pipes and feed them to pa3Fn, i.e. levels) and makes it difficult to mechanize these operations.

The purpose of this proposal is to ensure the fixation of products in the head.

This is achieved by the fact. that the head is provided with a force mechanism, kinematically connected by means of, for example, gear-rack gearing, with the outer surface of the nlan-pipe. on the inner surface of which protrusions are made, and the end face | 1 of the pressure on the pto.pki has variable grooves located around the circumference of the protrusion of the faceplate, and the sockets for the installation of workpieces are located in the same horizontal plane.

FIG. 1 schematically shows the description of the head; in fig. 2 - section. L-L FIG. one; in fig. 3 - the stopper of the plan and the housing; section B of FIG. one; in fig. 4 shows a view of grooves of variable cross section, section BB.

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Claims (2)

Opposed go.yuvk ;. The sand blasting unit comprises a housing 1, channels 2 for sand and compressed air supply and a planplate 3. In the housing there is a pressure sleeve 4 with a spring 5, intermediate rings 6 directly acting on the particle elements 7 and sleeves 8 with conical holes. ZHtastic elements 7 made in the form of rubber rings. In the faceplate 3, in the pressure sleeve 4, the intermediate rings 6 and the elastic elements 7, axial holes are formed, forming slots 9 for mounting the products. The head has two sockets for the installation of products located in the same horizontal plane. Push-bushing has the ability to move in the axial direction. There is a gap between the pressure sleeve 4 and the intermediate ring 6. The outer surface of the faceplate is equipped with gear teeth. M sector 10, which is meshed with gear rack 1 located on carriage 12, which is connected with stem 14 of force mechanism 15 by means of lever 13. Gear sector 10 ensures that the face plate rotates to 45 °. The inner face of the faceplate has protrusions 16, and the end surface of the push bushing has grooves 17 of cross-section, located around the circumference of the protrusions 16. There are two stoppers on the faceplate, each of which consists of a handle 18, a handle 19 with an eccentric and spring-loaded rod 20. The rod enters the annular groove 21 of the head housing. The head with a bracket 22 is attached to the frame of the non-jet installation. FIG. Figure 1 shows an embodiment in which the installation comprises two described heads, the face plates of which are controlled from one power mechanism. To clean the pipes, the last ones from the sandblasting table are inserted into the head nests up to the stop into the sleeves 8. The drive of the force mechanism is activated. The rod 14 is moved, transmitting the disruption through the carriage 12 with lever 13, the gear rail 11 and the gear sector 10 to the faceplate 4. Rods 20 are located in the recess slot 21, connecting the faceplate to the housing. When rotating the faceplate, the protrusions 16 interact with the grooves of the cross-section 17, moving from the position with the largest groove to the position with the smallest recess. The protrusions displace the pressure sleeve in the axial direction. By moving the pressure sleeve chooses a gap between it and the intermediate ring 6 and acts on the latter. Under the action of this compressive force, the elastic elements are deformed and clamp the pipes in the head nests. This provides a seal that seals the assembly when sand and compressed air is supplied. During processing, one end of the pipe is installed in the head, and the opposite - in the chamber for sand extraction (hell, not shown). At the end of sandblasting, under the action of the stroke of the power mechanism of the gear, the rack gear moves, turning the plate with the gears sector in the opposite direction. The tabs of the faceplate, in contact with the grooves of the pressure sleeve, will fall into the recess of the greatest magnitude. The pressure sleeve is moved in the axial direction by the action of the spring 5, forming a gap with the intermediate ring. Elastic elements restore their original shape, loosened the fastening of pipes, which are unloaded from the head. To access the parts located in the case, for example, when replacing elastic elements and sleeves, rotate the knobs 18 by 90 ° and remove the faceplate from the case, opening access to the interchangeable parts. In this case, the rods 20 come out of the annular groove 21, opening the housing and faceplate. Claim i. Head of sandblasting unit for processing internal surfaces of products, mainly pipes, comprising a housing with channels for supplying a working agent to machined pipes installed in sockets of the head housing with the possibility of holding and fixing them by means of elastic elements deformed through a pressure sleeve by means of a swivel plate. , characterized in that, in order to increase the reliability of fixing products in the head, the latter is equipped with a force mechanism, kinematically connected For example, a gear-rack engagement with the outer surface of the plate, on the inner surface of which protrusions are made, and the end surface of the outer sleeve has grooves of variable cross-section, located circumferentially opposite the projections of the plate. 2. The head according to claim 1, characterized in that, in order to reduce the labor intensity and increase the convenience of performing loading and unloading operations, the slots for installing the workpieces are located in the same horizontal plane. Sources of information taken into account during the examination 1. The head of a sandblasting unit designed by the Pervouralsk Novotrubny Plant (chart-arch. No. LAM 72661), has been working in the procurement and finishing pipe-wrap workshops of the specified plant since 1966.