CN212240310U - Special fixture for clamping bushing parts on cylindrical grinders - Google Patents

Abstract

The utility model relates to the field of grinding machine processing, in particular to a special clamp used for clamping parts of shaft sleeves on a cylindrical grinder, which is used for grinding and processing parts of the shaft sleeve. The turntable frame and the tailstock frame for fixing the tail thimble, the special fixture used for the cylindrical grinder includes the chuck sleeve, the suspension shaft of the shaft sleeve-like parts, the push-out mechanism and the pressing mechanism, and the chuck sleeve covers the first thimble. outside and fixed on the turntable frame, one end of the suspension shaft extends into the chuck sleeve, and the first thimble is pushed against the head end of the suspension shaft, and the push-out mechanism is fixedly installed on the outer circle parallel to the chuck sleeve and the suspension shaft On the grinding machine, the pressing mechanism is sleeved on the tail thimble, and is used for pressing the shaft sleeve parts on the suspension shaft. The coaxiality of the parts can be prevented from being eccentric, and the machining accuracy of the parts can be improved.

Description

Special fixture for clamping bushing parts on cylindrical grinders

technical field

The utility model relates to the field of grinding machine processing, in particular to a special clamp used for clamping parts of shaft sleeves on a cylindrical grinding machine, which is used for grinding and processing parts of shaft sleeves.

Background technique

With the rapid development of economy, cylindrical grinder fixtures are widely used on machine tools in the industrial field, but there are also many defects in production applications, such as: grinder fixtures cannot guarantee the reference coincidence of parts during cylindrical grinding, resulting The machining error is large, which affects the quality of the product; for the processing of sleeve parts with different shapes, different radial dimensions or different axial dimensions, in order to realize the clamping of the workpiece, it is often necessary to replace the fixture device, which virtually increases the fixture design. Manufacturing costs and production preparation cycles increase production costs. Or some grinder fixtures, when clamping or unloading, the loading and unloading time of the workpiece is long, the consistency between the inner hole of the sleeve parts and the axis of the mandrel is poor, and the outer circle and inner circle of the sleeve parts cannot be satisfied. The coaxiality between the holes is required, so the processing quality of the parts cannot be guaranteed.

For example: Patent No. 201510105154.1 discloses a clamp for automatically clamping and loosening a circular workpiece for a cylindrical grinder, including a clamping sleeve, a roller frame, a roller, and a protective cover. One end of the center hole of the clamping sleeve is fixedly arranged There is a roller frame, and a plurality of rollers are arranged in the roller frame; the end face of the clamping sleeve is provided with a protective cover, the protective cover is fixedly connected with the clamping sleeve, and the protective cover closes the roller frame together with the rollers in the clamping sleeve The inner wall of the central hole of the clamping sleeve is provided with multiple sets of curved surfaces, and the inner wall of the central hole and the outer surface of the workpiece form a plurality of wedge-shaped grooves. Although the fixture can position the parts to be processed at one end directly through the fixture by the tops of both ends of the grinder, as long as the grinder is started, the fixture can automatically clamp and rotate the workpiece, and the fixture can automatically release the workpiece when the grinder stops, but still Manual calibration is required, and the consistency between the inner hole of the sleeve part and the axis of the mandrel is poor. During processing, the part has no top tightening device, which is easy to loosen or eccentric during rotation, resulting in the coaxiality of the workpiece. The requirements cannot be met, and the machining quality of the parts cannot be guaranteed.

Utility model content

The purpose of the utility model is to provide a special fixture for clamping the parts of the shaft sleeve on the cylindrical grinder, to realize the automatic pressing and automatic unloading of the parts, to ensure the coaxiality of the parts during processing, and to prevent the shaft sleeve from being processed. Such parts appear eccentric, and improve the machining accuracy of the parts.

In order to achieve the above object, the technical scheme of the present utility model is as follows:

It is a special fixture used for clamping bushing parts on the cylindrical grinder. The cylindrical grinder includes a head thimble, a tail thimble, a turntable frame for fixing the head thimble and a tailstock frame for fixing the tail thimble. It is used for the special purpose of the cylindrical grinder The fixture includes a chuck sleeve, a suspension shaft of the shaft sleeve-like parts, a push-out mechanism and a pressing mechanism. The chuck sleeve is covered outside the first thimble and fixed on the turntable frame, and one end of the suspension shaft extends into the chuck sleeve. inside, and the first thimble is pushed against the head end of the suspension shaft, the push-out mechanism is fixedly installed on the cylindrical grinder parallel to the chuck sleeve and the suspension shaft, and the pressing mechanism is sleeved on the tail thimble for pressing the shaft sleeve Bushing parts on the suspension shaft;

The pressing mechanism includes a disc cover sleeve, a gasket, a pressing cylinder and a hanging cylinder plate that are sequentially sleeved on the tail ejector pin from the beginning to the end. The disc cover sleeve is sleeved on the tail ejector pin through a plane bearing. When the turntable frame moves in the direction, the disc cover sleeve covers the suspension shaft, and the needle tip of the tail thimble is pressed against the tail end of the suspension shaft. The hanging cylinder plate and the cylinder shaft are fixed on the gasket and extend toward the shaft sleeve parts clamped on the hanging shaft. There is a limit step at the tail ejector pin of the fixed hanging cylinder plate. When the cylinder shaft of the compressed cylinder does work, The limit step is used to limit the displacement of the pressing mechanism toward the tailstock.

The compression mechanism drives the compression cylinder through pneumatic control. Through automatic compression and loosening, the gap adjustment during installation of parts becomes simple, and it is no longer necessary to adjust the position of each part when clamping, and the relaxation is easy to control. It can also ensure the verticality of the shaft parts and the grinding machine tool, ensure the coaxiality and cylindricity, and ensure the higher precision of the price of the shaft parts, especially after manual clamping is not required, the work efficiency is greatly improved.

It is further limited that the push-out mechanism includes a push-out cylinder and a push-plate, the cylinder body of the push-out cylinder is fixed on the cylindrical grinder, the cylinder shaft extends and retracts toward the tailstock, the push-plate is perpendicular to the cylinder shaft, and one end of the push-out plate is fixedly mounted on the cylinder shaft. The front end and the other end of the cylinder shaft are semicircular and clamped on the outer circumference of the suspension shaft in a clearance fit manner, and the diameter of the semicircular end of the push plate is smaller than the maximum diameter of the shaft sleeve parts.

Further limited, the bushing type part is a sleeve type part or a shouldered bushing type part.

It is further limited that the suspension shaft is a multi-stage stepped shaft, the semicircular end of the push plate is clamped on the maximum diameter stepped section of the suspension shaft, and the minimum diameter stepped section of the suspension shaft extends into the disc cover sleeve, In addition, an annular groove is provided on the intermediate stepped section of the suspension shaft, and the shaft sleeve-like parts are sleeved on the suspension shaft with the annular groove. The multi-step suspension shaft is convenient for clamping the parts in the middle step section. The annular groove increases the friction force of the part during processing and avoids the mutual radial movement between the part and the suspension shaft. The maximum diameter step section is limited when the part is pressed. , The minimum diameter stepped section is easier to work with the push-out mechanism and the compression mechanism when unloading and pressing.

Further limited, the suspension shaft is a three-stage stepped shaft, the diameter of which decreases in turn along the direction from the head to the tail of the cylindrical grinder, and the chamfering transition between the intermediate stepped section and the smallest diameter stepped section.

Further limited, the pressing cylinders are divided into two groups, which are fixed between the gasket and the hanging cylinder plate with the tail ejector pin as the symmetrical central axis.

It is further limited that the disc cover sleeve is an assembly composed of a compression sleeve, a fixed cover and a connecting piece, the compression sleeve is T-shaped, and the larger diameter end of the compression sleeve is close to the plane bearing sleeve. On the tail thimble, and then the fixed cover is T-shaped, the larger diameter end of the fixed cover is covered on the plane bearing, the smaller diameter end is sleeved on the tail ejector in a clearance fit, and the connecting piece is sleeved on the diameter of the compression sleeve On the smaller side, the connecting piece and the fixed cover are installed with bolts.

Compared with the prior art, the utility model has the following beneficial effects: because the push-out mechanism is installed, the function of automatic loading and unloading is realized; because the pressing mechanism is designed, the function of automatic pressing is realized, and the parts are pressed during processing. It can prevent the axial or radial displacement of the parts during processing, ensure the coaxiality of the parts, and ensure their processing accuracy.

Description of drawings

Fig. 1 is the three-dimensional structure schematic diagram of the present utility model;

FIG. 2 is a schematic view of the enlarged structure in the direction A of FIG. 1;

Fig. 3 is the three-dimensional structure schematic diagram of the pressing mechanism of the utility model;

Fig. 4 is the exploded structure schematic diagram of the pressing mechanism of the present utility model;

Fig. 5 is the three-dimensional structure schematic diagram of the special clamp loosening shaft sleeve type part of the present invention;

Fig. 6 is the three-dimensional structure schematic diagram of the special-purpose clamp of the utility model pressing the shaft sleeve type part;

FIG. 7 is a schematic diagram of an exploded three-dimensional structure in which the chuck sleeve and the suspension shaft of the present invention are installed on the first thimble.

Detailed ways

In order to make the technical means, creation features, achievement goals and effects of the present utility model easy to understand, the present utility model is further described below with reference to the accompanying drawings and specific embodiments.

As shown in Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7, a special fixture for clamping bushing parts on a cylindrical grinder, the cylindrical grinder includes a first thimble 1, a tail thimble 3, as well as the turntable frame 2 for fixing the first thimble 1 and the tailstock frame 4 for fixing the tail thimble 3. The tailstock frame 4 can move along the lateral moving platform of the cylindrical grinder toward the turntable frame 2, so that the first thimble 1 and the tail thimble 4 are moved toward the turntable frame 2. The parts to be processed between 3 are pressed tightly between the two. The special fixture used for the cylindrical grinder includes a chuck sleeve 5, a suspension shaft 6 for suspending and installing shaft sleeve parts, a push-out mechanism 7 and a pressing mechanism 8, and the chuck sleeve 5 is covered outside the first ejector pin 1. And fixed on the turntable frame 2, one end of the suspension shaft 6 extends into the chuck sleeve 5, and the first thimble 1 is pressed against the head end of the suspension shaft 6, and the suspension shaft should follow the first thimble 1 and the turntable frame 2. Rotate together, the push-out mechanism 7 is fixedly installed on the cylindrical grinding machine parallel to the chuck sleeve 5 and the suspension shaft 6, and the pressing mechanism 8 is sleeved on the tail ejector pin 3 for pressing the shaft sleeve on the suspension shaft 6. Axle sleeve parts 9; Axle sleeve parts 99 are sleeve parts or shoulder sleeve parts.

The pressing mechanism 8 includes a disc cover sleeve 80 , a gasket 81 , a pressing cylinder 82 and a hanging cylinder plate 83 (the hanging cylinder plate is used to suspend and install two cylinders on the tail thimble 3 at the same time). A pressing cylinder), the disc cover sleeve 80 is sleeved on the tail ejector pin 3 through the plane bearing 84. When the tailstock frame 4 moves toward the turntable frame 2, the disc cover sleeve 80 is sleeved on the suspension shaft 6, and the tail ejector pin 3 The tip of the needle is pressed against the tail end of the suspension shaft 6, the gasket 81 is sleeved on the step of the disc cover sleeve 80, the cylinder body of the pressing cylinder 82 is fixed on the hanging cylinder plate 83, and the cylinder of the pressing cylinder 82 is fixed on the hanging cylinder plate 83. The shaft is fixed on the washer 81 and extends toward the shaft sleeve parts 9 clamped on the suspension shaft 6, and there is a limit step at the tail pin 3 of the fixed suspension cylinder plate 83. The pressing cylinders 82 are divided into two groups to The tail ejector pin 3 is fixed between the washer 81 and the hanging cylinder plate 83 as the central axis of symmetry. When the cylinder shaft of the pressing cylinder 82 performs work, the limit step is used to limit the displacement of the pressing mechanism 8 toward the tailstock 4 . The tail thimble 3 is against the suspension shaft 6, and rotates with the first thimble 1, and the disc cover sleeve 80 is installed with a plane bearing, and does not rotate with the tail thimble 3, then the connected pad/81, the pressing cylinder 82 and the hanging cylinder plate 83 does not rotate together, it is only responsible for pressing the parts.

The push-out mechanism 7 includes a push-out cylinder 70 and a push plate 71. The cylinder body of the push-out cylinder 70 is fixed on the cylindrical grinder, and the cylinder shaft of the push-out cylinder 70 is retracted toward the tailstock frame 4. The push plate 71 is perpendicular to the push-out plate 71. One end of the cylinder shaft of the cylinder 70 is fixedly installed at the front end of the cylinder shaft of the push-out cylinder 70, and the other end is semicircular and clamped on the outer circumference of the suspension shaft 6 by a clearance fit, and the diameter of the semicircular end of the push plate 71 is smaller than The maximum diameter of the bushing type part 9. In this embodiment, taking the shouldered bushing as an example, when the push-out mechanism performs work and discharges, the diameter of the semicircular end of the push plate 71 is smaller than that of the shoulder of the shouldered bushing, and the push plate 71 goes toward When the tail end moves, it is stuck on the shoulder shaft part of the shouldered bushing type parts, thereby driving the shouldered bushing type parts to move towards the tail end of the suspension shaft 6, and then the unloading is completed.

The suspension shaft 6 is a three-stage stepped shaft, and its diameter decreases in turn along the direction of the cylindrical grinder from head to tail. Above, the minimum diameter stepped section 61 of the suspension shaft 6 extends into the disc cover sleeve 80, and an annular groove is provided on the intermediate stepped section 62 of the suspension shaft 6, and the shaft sleeve parts 9 are in a transition fit manner. It is sleeved on the suspension shaft 6 with an annular groove, and one or two shaft sleeve parts can be sleeved at one time. The inner diameter of different shaft sleeve parts matches the suspension shaft 6 with different outer diameters, and also matches the compression shaft sleeves with different inner diameters. 801. Preferably, the transition between the intermediate stepped section 62 and the minimum diameter stepped section 61 is chamfered to facilitate the loading and unloading of parts such as bushings.

The disc cover sleeve 80 is an assembly composed of a pressing shaft sleeve 801, a fixing cover 802 and a connecting piece 803. The pressing shaft sleeve 801 is T-shaped, and the larger diameter end of the pressing shaft sleeve 801 is close to the plane. The bearing 84 is sleeved on the tail thimble 3, and then the fixed cover 802 is T-shaped. The larger diameter end of the fixed cover 802 is covered on the plane bearing 84, and the smaller diameter end is sleeved on the tail thimble 3 by clearance fit. The connecting piece 803 is sleeved on the side with the smaller diameter of the pressing sleeve 801, and the connecting piece 803 and the fixing cover 802 are connected and installed by bolts. It should be noted that the front needle head of the tail thimble 3 extends into the compression sleeve 801 but does not exceed the front end of the compression sleeve 801. When the compression sleeve 801 goes forward along the tail end of the suspension shaft 6, And when the front end of the tail thimble 3 just bears against the tail end of the suspension shaft 6, the pressing sleeve 801 just presses the shaft sleeve part 9 on the middle step of the suspension shaft 6, and the grinding machine can align the shaft. The sleeve parts are processed and ground. After the machining is completed, the cylinder shaft of the pressing cylinder 82 is retracted, the pushing cylinder 70 of the pushing mechanism 7 does work, and the push plate 71 pushes out the shaft sleeve parts 9 sleeved on the suspension shaft 6, and the unloading is completed. material.

The movement process of the clamp in this embodiment when used with the cylindrical grinder is as follows: first, the staff must complete the installation of the clamp. Axial degree, but also to ensure the smoothness of rotation. The push-out cylinder 70 is firmly installed and cannot be loosened when doing work, to ensure the verticality of the push plate 71 and the suspension shaft 6, and to ensure that the push plate 71 can smoothly move along the suspension shaft 6 under the drive of the push-out cylinder 70, and the pressing mechanism 8. After installation, ensure the coaxiality of the disc cover sleeve 80 with the tail ejector pin 3 and the suspension shaft 6. When the compression cylinder 82 is doing power and expansion, the tail end of the suspension shaft 6 can smoothly enter and exit the compression shaft sleeve 801.

After the above components are installed and adjusted, start to install the shaft sleeve parts 9 to be processed on the suspension shaft 6, then start the compression cylinder 82, the cylinder shaft of the compression cylinder 82 is extended, and the compression shaft sleeve 801 is driven forward Extend, so as to press the part tightly on the middle step of the suspension shaft 6, and the maximum diameter step 60 of the suspension shaft 6 limits the part, so that the part is just pressed at the position suitable for grinding.

After the processing is completed, the pressing cylinder 82 is retracted, the pressing bushing 801 is withdrawn from pressing the parts, and then the cylinder shaft of the pushing cylinder 70 is extended to do work, so that the push plate 71 moves, and the bushing parts are pushed out of the suspension shaft 6, the parts Drop, complete unloading. At this point, one cycle of processing is completed, and then there is no need to adjust the position of the fixture, and new parts are directly installed to continue processing.

The special fixture provided by the present utility model for clamping the parts of the shaft sleeve on the cylindrical grinding machine has been described in detail above. The description of the specific embodiments is only used to help understand the method of the present invention and its core idea. Several improvements and modifications are made, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims (7)

1. It is used for the special clamp for clamping the shaft sleeve type parts on the cylindrical grinder. The cylindrical grinder includes a head thimble, a tail thimble, and a turntable frame for fixing the head thimble and a tailstock for fixing the tail thimble. It is characterized in that: it uses The special fixture for the cylindrical grinder includes a chuck sleeve, a suspension shaft of the shaft sleeve-like parts, a push-out mechanism and a pressing mechanism. The chuck sleeve is covered outside the first thimble and fixed on the turntable frame. One end extends into the chuck sleeve, and the first thimble is pressed against the head end of the suspension shaft, the push-out mechanism is fixedly installed on the cylindrical grinder parallel to the chuck sleeve and the suspension shaft, and the pressing mechanism is sleeved on the tail thimble, Bushing parts used for pressing the bushing on the suspension shaft; The pressing mechanism includes a disc cover sleeve, a gasket, a pressing cylinder and a hanging cylinder plate that are sequentially sleeved on the tail ejector pin from the beginning to the end. The disc cover sleeve is sleeved on the tail ejector pin through a plane bearing. When the turntable frame moves in the direction, the disc cover sleeve covers the suspension shaft, and the needle tip of the tail thimble is pressed against the tail end of the suspension shaft. The hanging cylinder plate and the cylinder shaft are fixed on the gasket and extend toward the shaft sleeve parts clamped on the hanging shaft. There is a limit step at the tail ejector pin of the fixed hanging cylinder plate. When the cylinder shaft of the compressed cylinder does work, The limit step is used to limit the displacement of the pressing mechanism toward the tailstock. 2. The special clamp for clamping parts of shaft sleeves on a cylindrical grinder according to claim 1, wherein the push-out mechanism comprises a push-out cylinder and a push plate, and the cylinder body of the push-out cylinder is fixed on the outer circle On the grinder, the cylinder shaft is retractable toward the tailstock, the push plate is perpendicular to the cylinder shaft, one end of which is fixedly installed at the front end of the cylinder shaft, and the other end is semicircular and clamped on the outer circumference of the suspension shaft by clearance fit, and the push plate is The diameter of the semicircular end is smaller than the maximum diameter of the bushing type parts. 3 . The special fixture for clamping bushings on a cylindrical grinder according to claim 2 , wherein the bushings are sleeves or shouldered bushings. 4 . 4 . The special fixture for clamping bushing parts on a cylindrical grinder according to claim 3 , wherein the suspension shaft is a multi-stage stepped shaft, and the semicircular end of the push plate is clamped. 5 . On the stepped section of the largest diameter of the suspension shaft, the stepped section of the smallest diameter of the suspension shaft extends into the disc cover sleeve. In addition, an annular groove is provided on the intermediate stepped section of the suspension shaft. on the suspension shaft of the annular groove. 5. The special fixture for clamping bushing parts on a cylindrical grinder according to claim 4, wherein the suspension shaft is a three-level stepped shaft, along the direction from the beginning to the end of the cylindrical grinder The diameters decrease in turn, and there is a chamfered transition between the middle step and the smallest diameter step. 6. The special fixture for clamping parts of shaft sleeves on a cylindrical grinder according to claim 1, characterized in that: the pressing cylinders are divided into two groups, and the tail thimble is used as the symmetrical central axis to be fixed on the gasket and the cylinder. between the suspension plates. 7 . The special fixture for clamping shaft sleeves on a cylindrical grinder according to claim 4 , wherein the disc cover sleeve is an assembly composed of a pressing shaft sleeve, a fixing cover and a connecting piece. 8 . , the compression sleeve is T-shaped, the larger diameter end of the compression sleeve is close to the plane bearing and sleeved on the tail thimble, then the fixed cover is T-shaped, and the larger diameter end of the fixed cover is covered on the plane bearing. The end with the smaller diameter is sleeved on the tail thimble in the form of clearance fit, the connecting piece is sleeved on the side with the smaller diameter of the pressing sleeve, and the connecting piece and the fixed cover are connected by bolts.

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