CN210188514U

CN210188514U - Tailstock for machining turning shaft parts

Info

Publication number: CN210188514U
Application number: CN201920884125.3U
Authority: CN
Inventors: Jufang Wang; 王菊芳; Xu Li; 李旭; Wu Du; 杜武; Wenxiu Shi; 施文秀
Original assignee: NINGXIA CHANGXING PRECISION MECHANICAL CO Ltd
Current assignee: NINGXIA CHANGXING PRECISION MECHANICAL CO Ltd
Priority date: 2019-06-13
Filing date: 2019-06-13
Publication date: 2020-03-27
Anticipated expiration: 2029-06-13

Abstract

The utility model relates to a tailstock in the lathe, especially a tailstock for processing axle class part, this tailstock includes the tailstock, install the tailstock sleeve in the tailstock, tailstock locking device and sleeve locking device on the lathe guide rail with the tailstock is fixed in to the lathe, above-mentioned tailstock comprises the tailstock body, tailstock gliding mass and base, the tailstock body fixed mounting is on the tailstock gliding mass, the tailstock gliding mass is installed on a pair of guide rail on the base, be provided with tailstock gliding mass locking device and positioner between tailstock gliding mass and base, install the hydro-cylinder between base and tailstock gliding mass; the tailstock structure comprises a tailstock body, a movable tailstock sleeve is arranged in the tailstock body, a rotatable core shaft with a taper hole is fixedly arranged in an inner hole at the front end of the tailstock sleeve, and a driving device capable of driving the tailstock sleeve to move linearly is arranged at the rear end of the tailstock sleeve. The technical scheme of the utility model have characteristics such as rational in infrastructure, convenient to use, the axletree class part of processing on the double-main-shaft bi-polar face numerical control lathe is very fit for.

Description

Tailstock for machining turning shaft parts

Technical Field

The utility model relates to a tailstock in the lathe, especially a tailstock for processing car axle class part.

Background

At present, when shaft parts are machined, a double-spindle-box numerical control lathe has the characteristics of high machining efficiency and high machining precision and is widely used. When a long shaft part with more complicated processing procedures, such as an axle of a freight automobile, is processed, the processing procedures are as follows: the outer circles and inner holes of two end faces, two ends are machined, so that the outer circles and the inner holes are machined in two sequences under the condition that a workpiece is not disassembled, the outer circles are clamped by a first sequence to machine the end faces and the inner holes, a second sequence tailstock props against the two ends of the workpiece to machine the outer circles, the tailstocks at the two ends of a spindle box of the conventional double-spindle-box numerical control lathe are fixed, and the long-shaft parts are very difficult to assemble and disassemble, so that the machining efficiency is seriously influenced.

Disclosure of Invention

The utility model aims at providing a tailstock for processing axletree class part that portable, positioning accuracy are good.

In order to achieve the above purpose, the technical scheme of the utility model is that: a tailstock for processing axle parts comprises a tailstock, a tailstock sleeve arranged in the tailstock, a tailstock locking device for fixing the tailstock on a machine tool guide rail and a sleeve locking device for relatively fixing the tailstock sleeve and the tailstock, and is characterized in that the tailstock consists of a tailstock body, a tailstock sliding body and a base, wherein the tailstock body is fixedly arranged on the tailstock sliding body; the tailstock structure comprises a tailstock body, a movable tailstock sleeve is arranged in the tailstock body, a rotatable core shaft with a taper hole is fixedly arranged in an inner hole at the front end of the tailstock sleeve, and a driving device capable of driving the tailstock sleeve to move linearly is arranged at the rear end of the tailstock sleeve.

The tailstock locking device comprises a pressing plate positioned on the lower end face of the guide rail and a tailstock sliding body locking oil cylinder fixed on the tailstock sliding body, piston rods extend out of the upper end and the lower end of the tailstock sliding body locking oil cylinder, a lower piston rod is fixedly connected with the pressing plate, and a reset pressure spring is installed on an upper piston rod.

The sleeve locking device is a sleeve locking oil cylinder arranged on the tailstock body, two opposite pistons and a pressure spring arranged between opposite end faces of the pistons are arranged in the sleeve locking oil cylinder, and an arc surface matched with the excircle of the tailstock sleeve is arranged on the excircle surface of the opposite ends of the two pistons.

The driving device for driving the tailstock sleeve to linearly move is a driving oil cylinder, a cylinder body of the driving oil cylinder is composed of a tailstock sleeve inner hole, a partition plate is arranged in the middle of the tailstock sleeve inner hole, a sealing flange is arranged at the tail of the tailstock sleeve, a piston I is arranged in the tailstock sleeve inner hole between the partition plate and the sealing flange, an end cover is arranged on a tailstock body corresponding to the tail of the tailstock sleeve, a piston rod extends out of the sealing flange and the end cover and is fixedly connected with an adjusting plate fixed on the outer side of the end cover, and an adjusting bolt is arranged on the adjusting plate.

The tailstock sliding body positioning device is composed of positioning cylinder oil arranged on the base and a positioning block arranged on the tailstock sliding body, wherein a conical positioning pin is arranged at the upper end of a piston rod I in the positioning cylinder, and a positioning groove matched with the positioning pin is arranged on the positioning block.

The tailstock sliding body positioning devices are symmetrically arranged on two sides of the guide rail.

For a tailstock of a machine tool, the central line of a sleeve used for mounting a centre in the tailstock of the machine tool needs to be overlapped with the central line of a main shaft of the machine tool as much as possible, so that the shape, the relative position and the machining precision of a part during top turning can be ensured.

The technical scheme of the utility model has following characteristics: 1. the tailstock is driven by an oil cylinder to move up and down, the tailstock is positioned at the lower position during the first processing, the tailstock is driven by the oil cylinder to enable the center of the tailstock to coincide with the center of a machine tool spindle during the second processing, and a workpiece is propped by a tip; 2. a tailstock sliding body positioning device is arranged between the base and the tailstock sliding body, the center of the tailstock and the center of the machine tool are relatively overlapped in the machining process, the repeated positioning precision of the tailstock and the center of the main shaft of the machine tool is more accurate, and the precision of machined parts is better; 3. the tailstock sleeve can move relative to the tailstock body, so that the workpiece can be pushed tightly when the workpiece is different in length; 4. the tailstock has the characteristics of reasonable structure, convenience in use and the like, is very suitable for axle parts, and is particularly suitable for axle parts machined on a double-spindle double-end-face numerical control lathe.

Drawings

Fig. 1 is a bottom view of the present invention;

fig. 2 is a right side view of the utility model of fig. 1;

fig. 3 is a left side view of the present invention shown in fig. 1.

Detailed Description

In the figure, 1 is a tailstock body, 1-1 is a tailstock sleeve, 1-2 is a mandrel, 2 is a tailstock sliding body, 3 is a base, 4 is a guide rail, 5 is a tailstock locking device, 5-1 is a lower piston rod, 5-2 is a piston, 5-3 is a reset pressure spring, 5-3, 6 is a pressure plate, 7 is a driving device, 7-1 is an adjusting plate, 7-2 is an end cover, 7-3 is a cavity, 7-4 is a partition plate, 7-5 is a piston I, 7-6 is a sealing flange, 7-7 is an adjusting bolt, 8 is a sleeve locking device, 8-1 is an oil inlet, 8-2 is a piston II, 8-3 is a pressure spring, 9 is a tailstock sliding body positioning device, 9-1 is a piston rod, 9-2 is a piston III, 9-3 is a positioning pin, 9-4 is a positioning block, 10 is an oil cylinder, and 10-1 is a piston rod I.

As shown in fig. 1, 2, and 3, a base 3 is fixed to a machine tool body, a pair of guide rails 4 are provided on the base, a tailstock slide body 2 is attached to the guide rails, and a tailstock body 1 is fixed to the tailstock slide body. An oil cylinder 10 is arranged between the base and the tailstock sliding body, wherein the cylinder body of the oil cylinder is fixed on the base, and a piston rod I is connected with the tailstock sliding body.

The tailstock sliding body is provided with a tailstock locking device 5 which consists of a pressing plate 6 positioned on the lower end face of the guide rail 4 and a tailstock sliding body locking oil cylinder fixed on the tailstock sliding body 2, two ends of a piston 5-2 in the tailstock sliding body locking oil cylinder are provided with piston rods which extend out, wherein a lower piston rod is fixedly connected with the pressing plate, and an upper piston rod is provided with a resetting pressure spring.

The tailstock body is internally provided with a movable tailstock sleeve, the front end of the tailstock sleeve, namely an inner hole at the right end shown in figure 1, is fixedly provided with a rotatable core shaft with a taper hole, and the rear end of the tailstock sleeve, namely the left end shown in figure 1, is provided with a driving device 7 capable of driving the tailstock sleeve to linearly move.

The driving device is a driving oil cylinder, a cylinder body of the driving oil cylinder is composed of a tailstock sleeve inner hole, a partition plate 7-4 is arranged in the middle of the tailstock sleeve inner hole and divides the tailstock sleeve inner hole into a left cavity and a right cavity which are relatively sealed, a sealing flange 7-6 is arranged at the left end, namely the tail part, of the tailstock sleeve, a piston I7-5 is arranged in the tailstock sleeve inner hole between the partition plate and the sealing flange, an end cover 7-2 is arranged on the tailstock body corresponding to the tail end of the tailstock sleeve, a piston rod extends out of the sealing flange and the end cover to be fixedly connected with an adjusting plate 7-1 fixed on the outer side of the end cover, and an adjusting bolt 7-7 is arranged on the adjusting plate.

The tailstock body is provided with a sleeve locking device 8, the sleeve locking device is a sleeve locking oil cylinder arranged on the tailstock body, two opposite pistons II 8-2 and a pressure spring 8-3 arranged between the opposite end faces of the pistons II are arranged in the sleeve locking oil cylinder, and the outer circular faces of the opposite ends of the two pistons II are provided with circular arc faces matched with the outer circle of the tailstock sleeve 1-1.

A tailstock sliding body positioning device 9 is arranged between the base and the tailstock sliding body and consists of positioning cylinder oil arranged on the base 3 and a positioning block 9-4 arranged on the tailstock sliding body 2, a conical positioning pin 9-3 is arranged at the upper end of a piston rod 9-1 in the positioning cylinder, and a positioning groove matched with the positioning pin is arranged on the positioning block; the tailstock sliding body positioning device is provided with 2 sets of tailstock sliding body positioning devices, and the tailstock sliding body positioning devices are symmetrically arranged on two sides of the guide rail 4.

When processing, move the base to the lower position, be convenient for load and unload the work piece, according to work piece length and machining length and centre gripping length, rotatory adjusting bolt simultaneously, the left and right sides position of adjusting piston I in tailstock sleeve hole just can adjust the telescopic distance that moves of tailstock.

After the first sequence of workpieces is processed, a piston rod I in an oil cylinder fixed on a base extends out to drive a tailstock sliding body and a tailstock body to move upwards, after the workpieces are in place, oil is fed into oil cavities on the left sides of pistons III 9-2 in two tailstock sliding body positioning devices to push the pistons III to move rightwards, a conical positioning pin is arranged on the right end of the piston rod and is inserted into a positioning groove in a positioning block, the tailstock sliding body is accurately positioned on the base, then the tailstock sliding body locks the oil fed into the cavities on the lower sides of the pistons in the oil cylinder to push the pistons to move upwards, and a pressing plate is driven to move upwards through a lower piston rod to tightly press and lock the tailstock sliding body and a; then, oil is fed between a partition plate and a piston I in a driving oil cylinder which drives a tailstock sleeve to move linearly, the piston I is fixed, the tailstock sleeve moves rightwards under the driving of the partition plate, a top installed in a conical hole of a mandrel 1-2 is driven to abut against the left end of a workpiece to position the workpiece, then an oil inlet valve of a sleeve locking device 8 is controlled to be opened, pressure oil is conveyed to two far ends of two pistons II through oil inlets to enable the two pistons II to approach relatively, an arc surface, matched with the excircle of the tailstock sleeve, on the excircle surface of the two pistons II is tightly pressed with the excircle of the tailstock sleeve, and after the tailstock sleeve is locked, the excircle surfaces of two ends of the workpiece can be machined.

After the machining is finished, pressure oil in the sleeve locking device 8 is decompressed, the two pistons II move up and down under the action of pressure springs on the opposite end faces of the pistons II, and the tailstock sleeve is unlocked; then, oil is fed into a cavity 7-3 formed by the sealing flange 7-6 and the piston I, and the tail seat sleeve is driven by the sealing flange to move leftwards, so that the tip is separated from the workpiece; then, feeding oil to the right side of a piston III in the tailstock sliding body positioning device 9 to push the piston III to move leftwards and drive a positioning pin to be separated from a positioning groove; then, pressure oil in the tailstock locking device 5 is decompressed, and the piston moves downwards under the action of a reset pressure spring to enable the pressure plate to leave the guide rail; and then the piston rod I moves downwards to drive the tailstock sliding body and the tailstock body to move downwards to the lowest position, and then the process of machining one workpiece is completed.

Claims

1. A tailstock for processing axle parts comprises a tailstock, a tailstock sleeve arranged in the tailstock, a tailstock locking device for fixing the tailstock on a machine tool guide rail and a sleeve locking device for relatively fixing the tailstock sleeve and the tailstock, and is characterized in that the tailstock consists of a tailstock body (1), a tailstock sliding body (2) and a base (3), wherein the tailstock body is fixedly arranged on the tailstock sliding body, the tailstock sliding body is arranged on a pair of guide rails (4) on the base, the tailstock locking device (5) and the tailstock sliding body positioning device (9) are arranged between the tailstock sliding body and the base, and an oil cylinder (10) is arranged between the base and the tailstock sliding body, wherein an oil cylinder body is fixed on the base, and a piston rod is connected with the tailstock sliding body; the tailstock structure is characterized in that a movable tailstock sleeve (1-1) is arranged in a tailstock body, a rotary core shaft (1-2) with a taper hole is fixedly arranged in an inner hole at the front end of the tailstock sleeve, and a driving device capable of driving the tailstock sleeve to linearly move is arranged at the rear end of the tailstock sleeve.

2. The tailstock for processing axle parts according to claim 1, wherein the tailstock locking device (5) comprises a pressing plate (6) positioned on the lower end surface of the guide rail (4) and a tailstock sliding body locking cylinder fixed on the tailstock sliding body (2), piston rods extend from the upper end and the lower end of the tailstock sliding body locking cylinder, wherein the lower piston rod (5-1) is fixedly connected with the pressing plate, and the upper piston rod is provided with a resetting compression spring (5-3).

3. The tailstock for machining axle parts according to claim 2, wherein the sleeve locking device (8) is a sleeve locking cylinder arranged on the tailstock body (1), two opposite pistons (8-3) and a compression spring (8-4) arranged between opposite end faces of the pistons are arranged in the sleeve locking cylinder, and the outer circular surfaces of the opposite ends of the two pistons are provided with circular arc surfaces matched with the outer circular surface of the tailstock sleeve (1-1).

4. The tailstock for machining axle parts according to claim 3, wherein the driving device (7) for driving the tailstock sleeve (1-1) to move linearly is a driving oil cylinder, a cylinder body of the driving oil cylinder is composed of a tailstock sleeve inner hole, a partition plate (7-5) is arranged in the middle of the tailstock sleeve inner hole, a sealing flange (7-8) is arranged at the tail of the tailstock sleeve, a piston I (7-6) is arranged in the tailstock sleeve inner hole between the partition plate and the sealing flange, an end cover (7-2) is arranged on the tailstock body (1) corresponding to the tail end of the tailstock sleeve, the piston rod extends out of the sealing flange and the end cover and is fixedly connected with an adjusting plate (7-1) fixed on the outer side of the end cover, and an adjusting bolt (7-10) is arranged on the adjusting plate.

5. The tailstock for processing axle parts according to claim 4, wherein the tailstock slide body positioning device (9) comprises a positioning cylinder arranged on the pedestal (3) and a positioning block (9-5) arranged on the tailstock slide body (2), the upper end of a piston rod I (9-2) in the positioning cylinder is provided with a conical positioning pin (9-4), and the positioning block is provided with a positioning groove matched with the positioning pin.

6. Tailstock for machining parts such as axles according to claim 5, characterized in that said tailstock slide positioning means (9) are symmetrically arranged on both sides of the guide (4).