SU1558643A1 - Belt-grinding machine - Google Patents

Abstract

The invention relates to abrasive machining and can be used for belt grinding difficult-shaped parts. The purpose of the invention is to increase processing performance. Between two rows of tape mechanisms on a flexible carrier are moved along the guides of the workpiece to be processed. They are smoothly brought into contact with the tapes of the tape-forming mechanisms and drawn along an arc of a circle, each side of the workpiece being brought into contact with its corresponding tape, and withdrawing one side of the workpiece from the contact of one side at the same time allows setting the second side of the workpiece for insertion her in contact with the corresponding abrasive tape. The device includes installed oppositely each other on the frame of the row of tape-carrying mechanisms and a device for moving the blanks in the form of a cargo chain with carriers. As guide elements for the carrier, a pair of guide and drive sprockets are installed in the machine, the axes of which are parallel to the axes of the rollers of the tape drive mechanisms. In this case, the cargo chain moves between the rows of the tape-carrying mechanisms and closes around one of them. 1 hp f-ly, 5 ill.

Description

The invention relates to abrasive machining and can be used for belt grinding of parts with external hard-profile surfaces.

The purpose of the invention is to improve the processing performance.

FIG. Figure 1 shows the general kinematic scheme of a belt grinder; in fig. 2 - scheme of the machine when grinding the opposite sides of parts such as a wrench; in fig. 3 shows the node I in FIG. 2; on

FIG. 4 is a view A of FIG. 2 (section of breeding branches of the cargo chain for dropping the machined parts); in fig. 5 is a diagram of the machine with offset tape-moving mechanisms.

The machine consists of a bed 1, on which are mounted endless abrasive belts 2, tensioned on the lead 3 and driven 4 pulleys. The drive pulleys 3 are connected with the drives 5. On two struts 6, axles 7 are fixed for a pair of stars with equal spacing between each one of each pair of sprockets;

00

about

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WITH

me part.) 8, where this distance is longer than the rest. One star is associated with drive 9. Several pairs of stars 10 and 11, 12 and 13, 14 and 15, 16 5 and 17 are placed between the free branches 18 and 19 of the endless bands. With sprockets, a pair of goods is coupled to a double chain (carrier) 20, which is closed around at least one infinite abrasive belt (when there are only two). Holders 21 are mounted on the chain, which are provided with projections in the shape of keyed heads (not shown) to secure them .t5

In the treatment area, the chain 20 runs along the trajectory, due to the arrangement of the stars 10-17, their diameters and the direction of the circuit around each pair of these stars. In machines, 20 where one of the tape-moving mechanisms (one of the oppositely arranged rows of tape-moving mechanisms) is shifted, the machine can be additionally equipped with pinch rollers 22, with the help of which abrasives can be used to identify the angles of coverage of oppositely abrasive belts. the tape is pressed against the workpiece 23.

The machine works as follows. The workpiece is inserted into the space between the moving abrasive belts 2 oppositely located tape mechanisms (Fig. 1). The treatment is carried out by sequential contact with abrasive belts, first with one side of the part along an arc of a circle, and then with another side, each side of the part being brought into contact with its corresponding branch of abrasive belt. If necessary, 9. make prolonged contact with the tape of each of the sides of the workpiece being processed, its orientation relative to the surface of the tape in accordance with necessity. In this case, the workpiece is moved linearly in a certain area and only then is removed from contact with the tape along an arc of a circle. Output blanks for | the arc of a circle from the contact of one side with an abrasive belt simultaneously causes the workpiece to turn to its working position in order to begin the contact of the other side with the corresponding abrasive belt. Thus, to a minimum is reduced

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idle speeds, thereby improving processing performance.

When grinding the opposite sides of the part (Fig. 2), in the working area between rows of tape mechanisms, including several (or one by one, as in Fig. 2) mechanisms bearing abrasive tapes, 23 are inserted, fixed in the holder x 21 on the carrier 20. The last passage through the guide stars 10-17, in accordance with the given processing conditions, enters in turn one by one.

Then the other side of the workpiece is in contact with the corresponding branches of the abrasive belts. The installation of several tape mechanisms in the row on each side of the carrier is carried out when it is not necessary to process significantly different parts of one surface of the part (for example, straight line and radius). In this case, there are as many of them in each row of belt-like mechanisms as there are sections of the surface to be treated that should be processed separately.

To identify the angles of coverage of ribbons coming into contact from one side and the other side of the blanks, rows of tape-moving mechanisms can be shifted relative to each other by an amount that ensures the equality of the distances from the points of the beginning of contact of the blanks with tapes to the beginning of the working zones of these tapes, caused by the position of the pulleys 3.

Claims (2)

1. A grinding machine containing a series of tape-drawing mechanisms mounted on a frame and a unit for moving the workpieces relative to the tape-drawing mechanisms, made in the form of a cargo chain with workpiece holders, driving and guiding sprockets, characterized in that increasing the productivity of the machining process, the machine is additionally equipped with a second row of tape-carrying mechanisms, which are opposite to the existing ones, and the guide sprockets are located on axes parallel to the axes s zhnyh tape transport mechanisms and installed between the rows of platen 50 55 0 5 50 five idle speeds, thereby improving processing performance. When grinding the opposite sides of the part (Fig. 2), in a working area between rows of tape-forming mechanisms, including several (or one by one, as in Fig. 2) mechanisms bearing abrasive tapes, preparations 23, secured in holders 21 on the carrier 20. Last, the passage through the guide sprockets 10-17, in accordance with the specified processing conditions, enters alternately one, then the other side of the workpiece in contact with the corresponding branches of the abrasive belts. The installation of several tape mechanisms in the row on each side of the carrier is carried out when it is not necessary to process significantly different parts of one surface of the part (for example, straight line and radius). In this case, there are as many of them in each row of belt-like mechanisms as there are sections of the surface to be treated that need to be processed separately. To identify the angles of coverage of ribbons coming into contact from one side and the other side of the blanks, rows of tape-moving mechanisms can be shifted relative to each other by an amount that ensures the equality of the distances from the points of the beginning of contact of the blanks with tapes to the beginning of the working zones of these tapes, caused by the position of the pulleys 3. one . A grinding machine, which contains a series of tape-drawing mechanisms mounted on the frame and a unit for moving the workpieces relative to the tape-drawing mechanisms, made in the form of a cargo chain with workpiece holders, driving and guiding sprockets, different in order to increase machining productivity, the machine is additionally equipped with a second row of tape-borne mechanisms oppositely located relative to the existing ones, and guide stars are located on axes parallel to the axis of the roller zhnyh in tape transport mechanisms and installed between the rows of platen extension mechanisms, while the load-carrying chain with holders is arranged with the possibility of bending around guide sprockets from different sides and closing around one of the rows of tape-moving mechanisms, 15 1558643 2. The machine according to claim 1, characterized in that, in order to improve the quality of processing, one of the rows of tape-driving mechanisms is installed with an offset along the direction of movement of the load chain. 23 Compiled by I.Leonov Editor N.Tupitsa Tehred L.Oliynp Order 803 Circulation 603 VNIIPI State Committee for Inventions and Discoveries at the State Committee on Science and Technology of the USSR 113035, Moscow, Zh-35, Raushsk nab. 4/5 Na 2J Fy Proofreader O. Kravtsov Subscription