CN214350085U - Grinding device for grinding thread groove of lead screw by copying magnet - Google Patents

Abstract

The utility model relates to a grinding device for grinding a thread groove of a lead screw by a profiling magnet, which comprises a horizontal lathe main body and a movable grinding device, wherein the movable grinding device comprises the profiling magnet, a motor, a deep groove ball bearing, a belt, a sleeve and a movable support frame, and the movable support frame is driven by a slide carriage box to move longitudinally on the horizontal lathe main body; the movable support frame is connected with a sleeve through a deep groove ball bearing, a profiling magnet is fixedly connected to the sleeve, a motor is fixed to the movable support frame, the motor drives a belt, and the belt drives the sleeve to rotate; the horizontal lathe body clamps and fixes the lead screw to be machined and drives the lead screw to be machined to rotate. The advantages are that: the grinding area is big, and is efficient, and compact structure is difficult for generating heat, practices thrift the cost, and stress is little, can treat the helicoid and two sides of processing lead screw and grind many times, grinds effectually, is particularly useful for requiring the precision instrument of ultraprecision machining, to the occasion that transmission smoothness degree and degree of accuracy required height.

Description

Grinding device for grinding thread groove of lead screw by copying magnet

Technical Field

The utility model belongs to lead screw processing field especially relates to a profile modeling magnet grinds grinder of lead screw thread groove.

Background

The lead screw is an ideal product for converting rotary motion into linear motion or converting linear motion into rotary motion, is a key functional component of a numerical control machine tool, and is not only a key functional component of the numerical control machine tool, but also the precision of the lead screw often determines the precision of the whole instrument in certain precise instruments such as a microscope and the like, so that grinding is often used as a last procedure to improve the stroke error of the lead screw and improve the surface quality of the lead screw.

At present, the lead screw is divided into a common lead screw and a high-precision lead screw, the high-precision lead screw such as a lifting lead screw of a microscope mostly depends on import, related equipment and technologies are lacked in China, the surface precision required by people cannot be achieved by utilizing the current domestic technology, the common lead screw is machined, for example, a movable lead screw on a lathe is ground by a manual hand, or a grinding head is utilized on the lathe or a lead screw grinding machine is utilized for grinding.

At present, under the condition that the work piece quantity is not many, the mode of manual grinding is adopted in many mills, and the grinding effect of this kind of grinding mode relies on operating personnel's skill level, and is inefficient, and the control of parameters such as grinding pressure, grinding speed all depends on workman's experience, does not have fixed standard, does not have referable standard yet, can discover after professional detection, on the machined surface, roughness is uneven, and is good uneven, especially when the work piece quantity increases, and the cost of labor is too high, and the machining precision can't be guaranteed.

For solving the drawback that artifical grinding efficiency is low, what often adopted to process the lead screw in batches installs the grinding head additional on the lathe, processes the lead screw helicoid, and this kind of processing mode has improved grinding efficiency greatly, nevertheless simultaneously, other drawbacks have appeared again, for example: only the spiral surface of the screw rod spiral tooth shape can be processed, and two side surfaces of the screw rod spiral tooth shape cannot be processed; when the device is used for grinding the lead screw, only one small surface can be ground at a time, the device is easy to generate heat, the temperature rise is large, residual stress can be generated, and a workpiece is easy to deform; in addition, when the device works, the grinding head has poor self-sharpening performance, so that uniform grinding like magnetic grinding cannot be realized, the grinding amount is large and is difficult to control, and the grinding precision cannot be guaranteed although the grinding efficiency is improved.

Disclosure of Invention

The utility model aims at providing a profile modeling magnet grinds grinder of lead screw thread groove can grind the lead screw of various length, diameter, tooth type, improves the lead screw and grinds the precision.

In order to achieve the above object, the utility model discloses a following technical scheme realizes:

a grinding device for grinding a thread groove of a lead screw by a profiling magnet comprises a horizontal lathe body and a movable grinding device, wherein the movable grinding device comprises the profiling magnet, a motor, a deep groove ball bearing, a belt, a sleeve and a movable support frame, and the movable support frame is driven by a slide carriage box to longitudinally move on the horizontal lathe body; the movable support frame is connected with a sleeve through a deep groove ball bearing, a profiling magnet is fixedly connected to the sleeve, a motor is fixed to the movable support frame, the motor drives a belt, and the belt drives the sleeve to rotate; the horizontal lathe body clamps and fixes the lead screw to be machined and drives the lead screw to be machined to rotate.

The horizontal lathe body comprises a three-jaw chuck and a tailstock chuck, and the three-jaw chuck and the tailstock chuck are used for clamping a lead screw to be processed.

The profiling magnet comprises magnetic blocks and a spiral support, the spiral support is provided with a positioning groove, the magnetic blocks are embedded in the positioning groove, and the spiral support is made of soft magnetic materials.

The magnetic block is cylindrical.

The profiling magnet is spiral and matched with a thread groove of the screw rod, and a gap of 2-3mm is kept between the surface of the profiling magnet and a processing surface of the screw rod to be processed.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the processing magnet adopted by the utility model is a profiling magnet, compared with a common magnet, the magnet can better adhere to a processing surface during grinding, the single processing area can be increased during grinding, and the processing efficiency is increased; compared with the prior common grinding head or other grinding tools, the profiling magnet not only can efficiently process the screw spiral surface of the screw rod, but also can process two side surfaces of the screw spiral surface to be processed, and when the precision requirement is very high, such as the screw rod for adjusting the lens in a microscope, the common processing mode only processes the spiral surface, does not process the side surface, and often cannot meet the ultra-precise processing requirement of the workpiece.

2. This device adopts repacking horizontal lathe centre gripping work piece, on center lathe's basis, through the repacking, with two three-jaw chuck centre gripping work pieces, when the main shaft rotates, it is rotatory more stable, wait to process the radial vibration range of lead screw and reduce, the grinding precision is higher.

3. This device adopts removal grinder to grind and treats the processing lead screw, and removal grinder can be on the carriage apron case vertical (axial) removal, installs the motor simultaneously on removing grinder, and when the main shaft case area was treated processing and is moved the lead screw and rotate, the motor can drive profile modeling magnet through the belt and rotate towards opposite direction, when improving grinding efficiency, also can make to grind more evenly.

4. The utility model discloses wholly, it is big to grind the area, and is efficient, compact structure, is difficult for generating heat, practices thrift the cost, and stress is little, can treat the helicoid and two sides of processing lead screw and grind many times, grinds effectually, is particularly useful for requiring the precision apparatus of ultraprecision machining, requires high occasion to transmission smoothness and degree of accuracy.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

FIG. 2 is a schematic view of the structure of the mobile grinding device.

Fig. 3 is a schematic structural view of the copying magnet.

In the figure: 1-a spindle box 2-a three-jaw chuck 3-a movable support frame 4-a belt 5-a motor 6-a tailstock chuck 7-a movable tailstock 8-a large hand wheel 9-a small hand wheel 10-a slide carriage 11-a ball screw 12-a lead screw to be processed 13-a support plate 14-a sleeve 15-a profiling magnet 16-a belt wheel 17-a base 18-a deep groove ball bearing 151-a magnetic block 152-a spiral support 153-a positioning groove.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings, but it should be noted that the present invention is not limited to the following embodiments.

Referring to fig. 1 and 2, the grinding device for grinding the thread groove of the screw by the profiling magnet 15 is used for grinding and finish machining of various screw threads with different tooth shapes, diameters and lengths, mainly grinding and machining the bottom surface and the side surface of the tooth shapes, and comprises a horizontal lathe body and a movable grinding device, wherein the movable grinding device comprises the profiling magnet 15, a motor 5, a deep groove ball bearing 18, a belt 4, a sleeve 14 and a movable support frame 3, and the movable support frame 3 is driven by a slide carriage box 10 to move longitudinally on the horizontal lathe body; the movable support frame 3 is connected with a sleeve 14 through a deep groove ball bearing 18, the sleeve 14 is fixedly connected with a profiling magnet 15, a motor 5 is fixed on the movable support frame 3, an output shaft of the motor 5 is connected with a belt wheel 16, the belt wheel 16 is connected with a belt 4, the motor 5 drives the belt 4, and the belt 4 drives the sleeve 14 to rotate; the horizontal lathe body clamps and fixes the lead screw 12 to be machined and drives the lead screw 12 to be machined to rotate. Wherein, the belt 4 can be a V-shaped belt 4. The movable support frame 3 is composed of a support plate 13 and a base 17 which are vertically fixed with each other, the base 17 is connected with the slide carriage box 10, the motor 5 is fixed on the base 17, and the support plate 13 is used for supporting and connecting the profiling magnet 15. The motor 5 is started to drive the copying magnet 15 to rotate in the opposite direction through the belt 4, and the balls of the deep groove ball bearing 18 and the outer ring of the bearing are in point contact, so that the energy loss in the transmission process of the motor 5 is reduced.

The horizontal lathe body comprises a three-jaw chuck 2 and a tailstock chuck 6, wherein the three-jaw chuck 2 and the tailstock chuck 6 are used for clamping a lead screw 12 to be machined. Tailstock chuck 6 is fixed on removing tailstock 7, removes tailstock 7 and passes through the carriage box 10 drive, waves big hand wheel 8 and little hand wheel 9, can control and remove tailstock 7 longitudinal movement on carriage box 10, makes tailstock chuck 6 can accurate centre gripping different length lead screw work pieces. A main spindle box 1 of a horizontal lathe body drives a three-jaw chuck 2 to rotate, and then drives a lead screw 12 to be processed to rotate.

Referring to fig. 1-3, the profiling magnet 15 is spiral-shaped to match with the thread groove of the screw rod, and a clearance of 2-3mm is kept between the surface of the profiling magnet 15 and the processing surface of the screw rod 12 to be processed. The profiling magnet 15 comprises a magnetic block 151 and a spiral support 152, the spiral support 152 is provided with a positioning groove 153, the magnetic blocks 151 are embedded in the positioning groove 153, and the spiral support is made of soft magnetic materials such as pure iron and silicon steel; the magnetic block 151 has a cylindrical shape. The spiral bracket 152 is magnetized by a plurality of cylindrical magnetic blocks 151 embedded thereon so as to be magnetized as a whole. The inner surface and both side surfaces of the copying magnet 15 can adsorb magnetic abrasive particles and are used for processing the spiral inner surface and the side surfaces of the screw 12 to be processed. When the lead screw 12 to be processed and the profiling magnet 15 move relatively, the abrasive particles and the lead screw 12 to be processed rub against each other, and the plane to be processed of the lead screw 12 to be processed is processed.

Referring to fig. 1-3, a grinding method for grinding a thread groove of a lead screw by a profiling magnet 15 comprises the following steps:

1) the lead screw 12 to be processed penetrates through the sleeve 14 to be in clearance fit with the profiling magnet 15, and the distance between the inner surface of the profiling magnet 15 and the surface to be processed of the lead screw 12 to be processed is kept at 2-3 mm;

2) fixing two ends of a lead screw 12 to be processed by using a three-jaw chuck 2 and a tailstock chuck 6;

3) placing the movable grinding device at the processing starting point of the lead screw 12 to be processed;

4) mixing the water-based grinding fluid and the magnetic grinding particles in a ratio of 1:2, and injecting the mixture of the grinding fluid and the magnetic particles into a gap between a magnet and a lead screw by using an injector;

5) the switch is started, the horizontal lathe body and the motor 5 run simultaneously to drive the lead screw 12 to be processed to rotate, and the motor 5 drives the sleeve 14 and the lead screw 12 to be processed to rotate reversely, so that the abrasive particles are repeatedly ground on the grinding surface of the lead screw 12 to be processed, the grinding precision is improved, and the expected grinding effect is achieved. When the friction work is finished, the movable grinding device moves towards the tail end of the lead screw 12 to be processed, grinding particles on the profiling magnet 15 start to grind the processing surface of the lead screw 12 to be processed, and the profiling magnet 15 moves to the tail end of the lead screw; and rotating in the opposite direction, and finishing a processing cycle when the movable grinding device returns to the processing starting point. In order to improve the grinding effect, the profiling magnet 15 can reciprocate for a plurality of times under the driving of the slide carriage box 10.

Claims (5)

1. A grinding device for grinding a thread groove of a lead screw by a profiling magnet is characterized by comprising a horizontal lathe body and a movable grinding device, wherein the movable grinding device comprises the profiling magnet, a motor, a deep groove ball bearing, a belt, a sleeve and a movable support frame, and the movable support frame is driven by a slide carriage box to longitudinally move on the horizontal lathe body; the movable support frame is connected with a sleeve through a deep groove ball bearing, a profiling magnet is fixedly connected to the sleeve, a motor is fixed to the movable support frame, the motor drives a belt, and the belt drives the sleeve to rotate; the horizontal lathe body clamps and fixes the lead screw to be machined and drives the lead screw to be machined to rotate.

2. The device as claimed in claim 1, wherein the horizontal lathe body comprises a three-jaw chuck and a tailstock chuck, and the three-jaw chuck and the tailstock chuck are used for clamping the screw to be machined.

3. The grinding device for grinding the thread groove of the lead screw by the aid of the copying magnet as claimed in claim 1, wherein the copying magnet comprises a magnetic block and a spiral support, the spiral support is provided with a positioning groove, the magnetic block is embedded in the positioning groove, and the spiral support is made of soft magnetic materials.

4. A grinder for grinding lead screw thread groove with profiling magnet as claimed in claim 3, wherein said magnet is cylindrical.

5. The grinding device for grinding the thread groove of the screw rod by the copying magnet as claimed in claim 1, wherein the copying magnet is spiral-shaped to match with the thread groove of the screw rod, and a clearance of 2-3mm is kept between the surface of the copying magnet and the processing surface of the screw rod to be processed.

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