SU1395462A1 - Machine for dressing multiblade tools with straight grooves - Google Patents

Abstract

The invention relates to the field of machine tool construction, concerns sharpening a multi-blade tool and can be used in the tool industry. The aim of the invention is to improve the sharpening performance by simplifying the setup of the machine. A workpiece 8 is placed on the table 5 of the dividing head 6 and the headstock of the product 7. In the spindle headstock 9 with the lever 10 there is a spindle 11 with a grinding wheel 12. The spindle 11 contacts, the follower 14, the second end of the pusher 14 rests on the cam 15. The follower 14 is also in contact with the support 16. The mechanism of the reciprocating movement of the headstock of the product 7 includes a connecting rod 21, a crank 22, an engine 23 and a gearbox 24. The cam 15 is connected by a sliding key to the shaft 29. Gear 31 is rigidly mounted on the shaft 29. Gear 31 interacts with rake oh oh 36. Opposite the slats 36 is installed reg-® liable stop 39. Parallel to the course (P

Description

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The slats are fitted with a screw 41c with a limit switch 42. The rail 36, the adjustable stop 39 and the limit switch 42 form the cam position adjustment unit 15. The cross feed mechanism is formed by the push rod 14, cam 15 and cam position adjustment knot 15. For each double table stroke 5 cam 15 turns

at the angular step, while the pusher 14 moves the grinding wheel 12 by an amount determined by the ratio of the shoulders of the pusher 14 and the lever 10. The parameters of the automatic treatment process are provided by installing the support 16, the stop 39, the limit switch 42, 1C. f-ly, 2 ill.

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The invention relates to a machine tool industry, the sharpening of a multi-blade tool with straight grooves and can be used in the tool industry.

The aim of the invention is to improve the sharpening performance by simplifying machine set-up.

FIG. 1 shows the kinematic. ka machine diagram; in fig. 2 times- ; wrench of cam profile

On the guides of the bed 1 (Fig. 1) there are slides 2 connected to the bed with screw 3 with the handwheel 4. Table 5 is installed on the rails of the slide 2. On the table there are a dividing head 6 and the headstock ; Dvli 7, in which the workpiece 8 is clamped. On the vertical guides (not shown) of the bed there is a spindle head 9 with a lever 10, on one shoulder of which is located a spindle 11 with a grinding wheel 12, on the other - a spring 13. To the shoulder with a spindle 11. A lever-type pusher 14 is hinged. It is supported on the cam 15 and the support 16. and a screw 17 with a handwheel 18. On the spindle head 9 there is also a fixed stop 19 with a handwheel 20. The mechanism for returning the translational movement of the headstock 7 of the product includes a connecting rod 21 connecting the table 5 with the crank pin 22 connected to the engine 23 via a gearbox 24

At the periphery of the crank 22, the protrusion 25 engages a rocker 26 on which the lead dog 27 is mounted. A brake dog 28 is mounted on the bed 1. The cam 15 is connected by a sliding key with the shaft 29 on which the ratchet 30 and gear

31, and a disc 32 with slots for dogs 27 and 28 is mounted freely and connected by a finger 33 to an electromagnet 34 and a return spring 35. The gear 31 is engaged with the rail 36, which is pressed down by spring 37. A cam 38 is mounted on the rail. An adjustable stop 39 with a handwheel 40 is installed. A screw 41 with a limit switch 42 and a handwheel 43 is installed in parallel with the rail. Spindle headstock 9 is connected to the frame 1 with screw 44 with a handwheel 35. Rail 36, adjustable stop 39 and limit switch 42 form a cam position adjustment unit 15.

The cam 15, the pusher 14 and the node for adjusting the positions of the cam 15 form a cross feed mechanism.

The profile of the cam 15 (the scan of which is shown in Fig. 2) consists of two zones: the zone of working passes — with the movement of the pusher 14 (on the scan — an inclined section) and the zone of idle passes — without moving the pusher 14.

To set the parameters for the automatic processing process by handwheel 40 (Fig. 1), the adjustable stop 39 is pushed, moving the rail 36,

through the gear 31 and the shaft 29 turns the cam 15 until the end of the pusher 14 on the cam 15 is in the zone of idle passages. The screw 44 of the spindle head 9 is set so that the position of the periphery

grinding wheel 12 corresponded to the end of grinding. For this purpose, a template can be used that is installed instead of the workpiece 8 in the centers of the dividing head 6 and the headstock of the product 7. This position of the headstock 9 is fixed by a fixed stop 19 J

Then, the plunging depth is set to double stroke - by a handwheel 18J, the number of working passes - by a handwheel 40, while the feed mechanism rises to its original position, the number of idle passes - by a handwheel 43.

The machine works as follows

With the inclusion of the motor 23-crank. 22 begins to rotate, and the rod 5 table 5 connected with it is driven in reciprocating motion. The automatic feed is switched on by an electromagnet 34, which, the finger 33, pushes the disk 32 so that the pawls 27 and 28 engage with the ratchet 30. When the lug 25 on the crank 22 interacts with the rocker 26, the leading dog 27 for each double turn of the table 5 rotates the ratchet 30, ac through the shaft 29 and cam 15, by an angular pitch, which causes the grinding wheel 12 to move by an amount determined by raising the profile of the cam 15 by an angular pitch, the ratio of the arms of the pusher 14J depends on the position of the support 16; leverage arm ratio 10

In this case, the rail 36 connected to the gear 31 is retracted from the adjustable stop 39, compressing the spring 37, and moving until the cam 38 on the rail 36 presses the limit switch 42, the electromagnet 34 turns off, the spring 35 behind the finger 33 pivots the disc 32, the pawl 27 and 28, the ratchet 30 frees

c, and the rail 36, under the action of the spring 37, returns to the adjustable stop 39, returning the cam 15 to the original

position. When this happens, the grinding wheel 12 rebounds from the workpiece 8. After a divisional rotation of the workpiece 8, the process is repeated.

A significant reduction in changeover time without using replaceable elements, reducing operator fatigue by automating grinding and nursing processes provide high machine performance and high quality work.

Formula.

the invention

Claims (1)

1, A machine tool for sharpening a multi-blade tool with straight grooves made in the form of a bed on which the workhead is located, the grinding headstock with the spindle and the cross feed mechanism, the back and forth movement of the workhead heads, which differs in that In order to increase the productivity of the wheel by simplifying the adjustment of the machine, the cross feed mechanism is made in the form of a cam mounted in the grinding head, which is kinematically connected to the back and forth motion mechanism lirovki cam position and located in the headstock pusher made double-armed, one arm kotorrgo installed in contact with the cam, and the other - with the wheelhead spindle. 2, The machine according to claim 1, characterized in that the cam position adjustment unit is designed as a limit switch located on the frame and a rack kinematically connected with the cam with an adjustable stop, and the limit switch is interoperable with the rail. Pushes J8) S f G2 JO 8 G C 6 S 10 Rootsch "" "" npoxoot C (. Frequently Worker md 0ifs.2