CN201304491Y - Dedicated vehicle eccentric machine - Google Patents

Abstract

The utility model relates to a lathe for processing metal revolving body, which has the characteristics of reliable part clamping, high machining precision, high production efficiency and convenient operation. The technical problem to be solved is to provide a lathe capable of processing a tiny eccentric shaft effectively. The technical scheme is that a dedicated vehicle eccentric machine comprises a main shaft provided with an eccentric gripping head and at least one tool holder; the main shaft and the tool holder are respectively driven by a power plant through a transmission chain; the main shaft is vertically arranged; the eccentric gripping head is mounted at the top end of the main shaft; the tool holder is positioned on a track which is vertically arranged; and the tool path movement of the tool holder is realized through the driving of a lever cam mechanism. The lever cam mechanism comprises a cam driven by the power plant and a lever driven by the cam; the lever is hinged on an upright column; the right end of the lever is propped against the cam, and the left end of the lever drives the tool holder to slide along the track so as to realize tool path movement. A return spring exerts a force on the tool holder, so that the tool holder is provided with static energy to slide upward.

Description

Special vehicle eccentric machine

technical field

The utility model relates to a metal processing machine tool, in particular to a lathe for processing metal rotary bodies.

Background technique

Among many digital products and precision instruments represented by digital cameras and digital cameras, there are many high-precision metal cutting parts, especially tiny eccentric shafts; due to the small size and high precision of the parts, it is difficult to manufacture them with ordinary machine tools; Mainly: 1. The eccentric direction of the part cannot be controlled; 2. The clamping of the part is difficult; because the clamping part of the part is short and the main shaft is in a horizontal state, the center of gravity of the part falls outside the clamping surface, and the part must be supported when clamping. Difficulty; 3. The feed of the tool cannot be precisely controlled, and the machining accuracy is low.

Utility model content

The technical problem to be solved by the utility model is to overcome the deficiency of the above-mentioned background technology, and provide an improvement of an eccentric lathe, which should be able to effectively process tiny eccentric shafts, and has the characteristics of reliable parts clamping and high processing accuracy; and production High efficiency and convenient operation.

The technical solution adopted by the utility model is: eccentric machine for special vehicle, including a main shaft equipped with an eccentric chuck and at least one tool holder, the main shaft and the tool holder are respectively driven by a power device through a transmission chain; it is characterized in that the main shaft is arranged vertically , the eccentric collet is installed on the top of the main shaft; the tool rest is positioned on a vertical track, and the tool movement of the tool rest is realized by the drive of the power device through the lever cam mechanism.

The lever cam mechanism includes a cam driven by the power unit and a lever driven by the cam; the lever is hinged on the column, the right end of the lever is pressed by the cam, and the left end of the lever pushes the tool holder to slide along the track Realize the feed movement.

The tool rest is also biased by a return spring, so that it has the potential energy to slide upwards.

The track is a dovetail groove that fits between the knife rest and the knife rest seat.

The power device is a motor.

The working principle of the utility model is: the motor drives the main shaft through the transmission belt, so that the eccentric chuck at the top of the main shaft drives the clamped parts to rotate at high speed; at the same time, the motor drives the cam to rotate, and the cam pushes the lever to swing, and the other end of the lever is Press the tool holder to make it (overcome the pressure of the return spring) move down along the track, and the turning tool on the tool holder realizes the cutting process on the machined parts; after the cutting is completed, the pressing force of the cam on the tool holder through the lever disappears, The tool holder is driven back to the initial position by the pressure applied by the return spring.

The beneficial effects of the utility model are as follows: 1. The main shaft is changed to a vertical arrangement. When working, only the parts need to be placed on the positioning surface of the eccentric chuck, and there is no need to hold the parts when clamping, which brings great convenience to the clamping parts. ;2. The automatic tool feeding system controlled by the cam can be installed to control the starting and ending position of the tool more accurately, and the feeding uniformity of the tool can be more accurately controlled to ensure the machining accuracy; Turning two control cams can further improve the machining accuracy; 3. The eccentric chuck and tool holder are used as standard parts, which can not only ensure the processing requirements of the parts, but also further reduce the cost of the equipment; 4. High productivity; operation The personnel only need to clamp the parts to be processed and remove the finished products, and the rest of the processing can be carried out automatically; so the production efficiency is high, especially suitable for batch parts processing.

Description of drawings

Fig. 1 is a front structural schematic view of the utility model.

Fig. 2 is a top view structural diagram of the utility model.

Fig. 3 is a left view structural diagram of the utility model.

Fig. 4 is an enlarged structural schematic diagram of the tool rest and the eccentric chuck in Fig. 3 .

Fig. 5 is a schematic diagram of the enlarged structure of the eccentric chuck in Fig. 4 in the top view direction.

Detailed ways

As shown in the figure, the special vehicle eccentric machine, the top of the main shaft 6 of the machine is equipped with an eccentric chuck 7, and is positioned vertically and rotatably (through bearings) on the bracket 5; the power unit (motor 16) passes through the transmission chain (Belt 20) drives the main shaft to rotate. This machine is provided with at least one knife rest 9 again, and this knife rest is positioned on the track of vertical arrangement; As can be seen in the figure: knife rest seat 8 is fixed on the column 4, and described track is between the knife rest and the knife rest seat Interfitting dovetail slots. The tool rest is a standard part and can be purchased directly.

The lever cam mechanism includes a cam 1 driven by the power unit and a lever 13 driven by the cam; in the figure, the top of the column is hinged to the lever 13 through the hinge shaft 11 on the support block 12, and the positioning pin 15 at the right end of the lever pushes Be pressed on the circumferential working surface of cam; Like this, power unit (motor 18) drives the swing of lever again after speed reducer 17 and transmission belt drive cam, promotes knife rest to slide down along knife rest seat 8 and carries out feed motion. Since the shape of the circumferential working surface of the cam determines the feed speed of the tool holder, it is necessary to design and process the lift curve of the cam according to the different requirements of the material of the processed parts, the machining accuracy and roughness, so as to ensure that various materials and different technologies The machining accuracy of the required eccentric parts.

It can be seen in Fig. 4 that the pull rod 26 passes upwards through the hole of the tool rest and is connected to the lever, and a spring 25 is worn on the pull rod, the bottom end of the spring is held by the pull rod, and the upper end of the spring exerts upward pressure on the knife rest , so that the knife rest 9 has the potential energy to slide upwards and return to the initial position, and the fixed screw at the left end of the lever is pressed against the adjusting screw 10 at the top of the knife rest 9 all the time.

The eccentric chuck 7 is a standard part and can be purchased directly. The eccentric chuck is equipped with an eccentric positioning structure, and the eccentric direction of the eccentric chuck can be adjusted correctly in advance; when the parts are clamped, just insert the parts into the positioning hole 7-1 in the center of the eccentric chuck and then clamp the parts, which is convenient and convenient. Save effort.

Further, the utility model arranges two tool rests in the symmetrical direction around the eccentric chuck, respectively uses two cams to control the knife feeding, and simultaneously performs rough turning and finishing turning; not only the rough turning and finishing turning can be completed in one cycle, Moreover, the rough turning tool 22 and the finishing turning tool 23 are arranged symmetrically at 180 degrees, and the radial cutting force of the rough turning and finishing turning can cancel each other out to push the parts to one side, which reduces the possibility of giving up the tool when turning the slender parts performance, processing quality has also been further improved.

Also have among the figure: the adjusting handle 27 that controls knife rest to move left and right.

Claims (5)

1, the eccentric machine of special-purpose vehicle comprises main shaft (6) and at least one knife rest (9) that eccentric clamping (7) are housed, and main shaft (6) and knife rest are driven by driving-chain by power set respectively; It is characterized in that described main shaft is arranged vertically, described eccentric clamping is installed in the top of main shaft; Described knife rest is positioned on the track of vertical setting, and the feed campaign of knife rest is realized by the driving of power set by lever and cam mechanism.

2, the eccentric machine of special-purpose vehicle according to claim 1 is characterized in that described lever and cam mechanism comprises the cam (1) that driven by power set and by this cam-actuated lever (13); Lever is hinged on the column (4), and the right-hand member of lever is subjected to the roof pressure of cam, and the left end of lever then promotes described knife rest and slides along the track realization feed campaign.

3, the eccentric machine of special-purpose vehicle according to claim 1 and 2 is characterized in that described knife rest also is subjected to the application of force of a returning spring (25), so that it possesses the potential energy that up slides.

4, the eccentric machine of special-purpose vehicle according to claim 3 is characterized in that described track is a mutual chimeric dovetail groove between knife rest (9) and the carriage saddle (8).

5, the eccentric machine of special-purpose vehicle according to claim 4 is characterized in that described power set are motors.

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