SU1284791A1 - Device for finishing surface of revolution - Google Patents

Abstract

The invention relates to mechanic processing, and specifically to the regulation of the relative position of the surface of the workpiece and the working surfaces of the tool, and can be used in the process of fine-tuning with abrasive pastes rotation bodies with cylindrical, spherical and conical surfaces. The purpose of the invention is to increase productivity - while ensuring the accuracy of the geometric shape of 0.1-1.0 microns and an increase in the percentage of yield of parts with high dimensional accuracy; On the bed 1 two tool heads 10 and 11 with lap 12 and 13 are mounted for radial movement. On the head 11 there is a mechanism for moving the head 10 relative to the head 11, made in the form of an electric motor 15, a gearbox 16 and a differential screw 17 with a spherical tip 18, under the action of the spring 14 in the force contact with the support surface 19 of the head 10. The sensor 11 also has a sensor 20 for measuring the magnitude of the radial displacement of the heads. 2 ill., 1 tab. i (Л С

Description

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The invention relates to mechanical processing, in particular, to the regulation of the relative position of the workpiece surface and the working surfaces of the tool, and can be used in the process of fine-tuning with abrasive pastes rotation bodies with idlinicheskimi, spherical and conical surfaces.

The purpose of the invention is to increase productivity while ensuring the accuracy of the geometrical shape of 0.1-1.0 microns and increasing the percentage of yield of parts of high dimensional accuracy by providing a gap between the tool and the workpiece, depending on the size of the abrasive ones; grains and the use of two rationally moving tool heads

12847912

clearance in conditions of continuous removal of the material being processed during processing, including without removing the fragmented

5 in the process of finishing the abrasive, since its value is less than 5-10% of the size of the abrasive grains of the main fraction and can be taken into account when adjusting the gap.

 О The device contains a frame 1 on which the headstock 2 of the product with a rotating spindle 3 is located, in which on the mandrel 4 a part 5 is installed with the workpiece closed (abutting

1 at the end) with a concave cylindrical surface 6, Grandma 2 has the ability to make reciprocating longitudinal (along the axis of rotation of the spindle 3) movement in the direction of the radial-20 gauge measurement sensor 7. 7. The base 1 is also located on the base 1.

Figure 1 shows a device, a view; figure 2 - section aa in figure 1.

25

jia guides 8 and 9 tool heads 10 and 11 with lap 12 and 13, with the possibility of horizontal transverse movement relative to each other and the frame. The tool heads 10 and 11 are connected by a tension spring 14, which presses the lap 12 and 13 from each other in the direction towards the surface 6 of the part 5. The setting of the gap between the surface of the workpiece and the working surfaces of the tool is in the range 0.1 - 0.9 from the size of the abrasive 1x guides 8 and 9, the tool heads 10 and 11 with lap 12 and 13, having the possibility of horizontal transverse movement relative to each other and the frame. The tool heads 10 and 11 are connected by a tension spring 14, which presses the lap 12 and 13 from each other in the direction towards the surface 6 of the workpiece 5. On the tool of the main fraction by means of a radial-30 steering head 11

Mutual movement of the opposing elements of the tool in the direction from the workpiece surface after contact of the working surface of the rigid lateral horizontal movement of the head 10 relative to the head 11, including the electric motor 15, the gearbox 16 and the tool with the processed 35 differential screw 17 with a spherical surface, allows fine-tuning with abrasive, mainly diamond pastes due to a reduction to a minor amount of cutting power at the drowning areas 40 th surface obrabatyvaemoh produce selective removal of material from the treatment surface projecting portions, thereby reducing

the error of the geometrical shape of the formation of a gap between the working surface up to 0.1 — „surfaces of pritiers 12 and 13 and 1.0 microns; fine-grained (10–40 microns and more) abrasive (diamond) pastes, thereby increasing

A CMM tip 18 under the action of the spring 14 in force contact with the support surface 19 of the tool head 10. Also on the tool head 11, a sensor 20 (with an electrical input to the reading device 21) is measured to measure the magnitude of the rigid transverse movement of the head 11 from the moment the surface is machined. 6 details 5. A screw 22 is mounted on the head 10 coaxially with the sensor 20 to regulate the productivity of the treatment process, and thereby get rid of the uncontrollable finishing with a fine-grained abrasive, Secondly, as the material being processed is removed, the error of the geometrical shape of the surface being processed often increases. The use of a sensor for measuring the magnitude of the radial displacement allows periodic adjustment of the spacing 7 7. On the base 1 there are also

ia of the guides 8 and 9 are tool heads 10 and 11 with lap 12 and 13, having the possibility of horizontal transverse movement relative to each other and the frame. The tool heads 10 and 11 are connected by a tension spring 14 that presses the lap 12 and 13 apart from each other in the direction of the workpiece 6 on the part 5. On the tool head 11,

the mechanism of rigid transverse horizontal movement of the head 10 relative to the head 11, which includes an electric motor 15, a gearbox 16 and a differential screw 17 with a spherical s-

the beginning of the formation of a gap between the working surfaces of the lap 12 and 13 and

KIM tip 18, under the action of the spring 14 in force contact with the support surface 19 of the tool head 10. Also on the tool head 11 there is a sensor 20 (with an electrical input to the reading device 21) measuring the size of the rigid transverse movement of the head 11 since the formation of the gap between the working and surface lapping 12 and 13 and

the machined surface 6 of the part 5. On the head 10 coaxially with the sensor 20, a screw 22 is installed to adjust the zero position of the reading device 21.

Lapping is performed as follows.

By means of an electric motor 15 with a gearbox 16, the differential screw 17 is turned, the spring is pulled and the support surface 19 is pressed so that the lap 12 and 13 approach each other

with the other, and then with axial movement of the headstock 2, rugs 12 and 13 are inserted into the machined hole of the part 5 along the guides 7.

Similarly, the differential screw 17 is turned in the opposite direction, the release spring 14, which separates the tool heads 10 and. 11 and, respectively, lapping 12 and 13, bringing their working surfaces closer to the surface 6 of the part 5, until the reference arrow. the device 21 will not stop, indicating that the working surfaces of the lap surfaces 12 and 13 are in full contact with the surface 6 of the workpiece 5 and the spherical tip 18 is separated from the supporting surface 19,

After stopping the arrows by turning the screw 22, the movable head of the sensor 20 is squeezed out (or released) until the pointer of the reading device 21 is set to the zero position, and then by reverse rotation of the differential screw 17, the groundings 12 and .13 are removed from the surface 6 of the part 5 for distance.

25 grains, the primary split of which does not form the flat edges of the large rag. Further reduction of the gap is not feasible according to the condition of its installation. Increasing the gap to 0.9, heleous 0.1 to 0.9 of the size of the abrasive grains of the main fraction, determined 30 figuratively when using an abrasive with the position of the arrow of the readout i with sharp edges, mainly devices 21. For example, take a fine-grained, capable of finishing with a size of 10 µm, while finishing the diamond cutting (to make it with a paste of 20 µm grain), remove the surface by moving the headstock 2 in the direction of the material. An increase in gap 7 partially removes ground joints 12 and above 0.9 leads to a sharp drop 13 from part 5, applies an abrasive paste, such as diamond paste with a grain size of 10 or 40 µm, ground surfaces 12 and 13 and the treated surface 6 of part 5, spindle 3 headstock 2 rotated, including axial oscillation of head 2 of the product along guides 7, providing rotation and longitudinal translation of part 5 relative to prints 12 and 13 during the finishing process, which usually lasts 1 - 5 minutes.

removal of the material being processed due to a sharp decrease in the cutting force; i The lathe is used to make closed concave cylindrical surfaces of bearings with a diameter of 20 mM and a length of 10 mm with an accuracy of 1.0 µm under the machining conditions given in the table.

Claims (1)

Invention Formula A device for fine tuning of the surfaces of rotation, containing installed- In the process of fine-tuning, as far as mutual-50 with the possibility of radial transmission 4791 4 Dine: bx limits (O, 1 - 0.9 of the size of the abrasive grains of the main fraction) ,. The adjustment is carried out with a wide range of processing modes, for example, 5 with a spindle rotational speed of 14 rpm, an oscillation speed of 10 double strokes per minute, an oscillation value equal to half the length of the forming surface of the treated surface, the operating force of the spring 14 is about 50 N. fO The optimal size of the gap between the workpiece surface and the working surface of the lap is equal to 0.5 o; g of the size of the main fraction of abrasive grains. With such a gap size, the abrasive grains immediately after a single splitting (in the process of finishing) enter the work on to selective I will remove the processed material with the greatest - productivity. Reducing the gap to 0.1 of the size of the grains is advisable when using coarse-grained abrasive grains, the primary split of which does not form the flat edges of a large rag. Further reduction of the gap is not feasible according to the condition of its installation. Increasing the gap to 0.9 is advisable when using a sharp-edged abrasive, preferably fine-grained, capable of removing the material to be processed without creasing (to increase productivity). Increasing the gap - in excess of 0.9 leads to a sharp drop removal of the material being processed due to a sharp decrease in the cutting force; i The lathe is used to make closed concave cylindrical surfaces of bearings with a diameter of 20 mM and a length of 10 mm with an accuracy of 1.0 µm under the machining conditions given in the table. Invention Formula When working surfaces of parts and lapping are worn out, time is used for adjusting the mutual position of the parts and lapping in this way, often with the addition of the ab-55 characteristic, which, as a result, of the paste paste, try to maintain the gap between workers grounding surfaces 12 and 13 and the surface 6 of the part 5 being processed, replacing two tool heads and a mechanism for radial movement of the other head relative to the first head mounted on one of the heads, resulting in an increase in Ensuring the accuracy of the geometric shape of 0.1–1.0 µm and increasing the yield of usable parts of high 5128А7916 dimensional accuracy, the supply device is made in the form of an electric motor with a sensor for measuring the size of races, gearbox and differential diagonal movement of the tool-screw with a spherical lug, individual heads mounted on the one installed with the possibility of contact from the heads with the bearing surface of another head. Processing conditions :: njiZLi: z :: i ra 0.05 0.1 0.5 0.9 1.1 40 40 20 10 10 2.0 4.0 10.0 10 10 10 2 4 5 or more 10-20 eight ten 20-3 Accuracy of the geometric shape of the finished surface, micron 0.1 1.0-2.0 and more 1.0-2.0 0.2 0.15 Size accuracy, micron 2.0-5.0 1.0 1.0 1.0 2.0 2.0-5.0 Treatment 40 20 10 10 eight ten 20-30 0.1 1.0-2.0 and more 1.0 2.0-5.0 //