V-shaped clamping jaw device for technological standard machining of spherical valve parts

Abstract

The utility model relates to the technical field of spherical valve part machining, in particular to a V-shaped clamping jaw device for spherical valve part process standard machining, which comprises three V-shaped clamping jaws, a replaceable opening lining, a connecting block and a chuck base, the V-shaped clamping jaws are circumferentially arranged, the bottoms of the V-shaped clamping jaws are connected with the connecting block, and the replaceable opening lining is arranged on the chuck base. The connecting blocks are matched with the chuck base through key grooves and can limit left-right displacement of the V-shaped clamping jaws, triangular splines are arranged at the bottoms of the V-shaped clamping jaws, the triangular splines at the bottoms of the V-shaped clamping jaws are meshed with the triangular splines on the chuck base and limit radial displacement of the V-shaped clamping jaws, and first inner conical surfaces, inner cylindrical surfaces, second inner conical surfaces and arc-shaped surfaces are sequentially arranged on the inner sides of the V-shaped clamping jaws from top to bottom. The first inner conical surface and the second inner conical surface make contact with the surface of the spherical valve part, the arc-shaped surface is in clearance fit with the outer circle face of the replaceable opening lining, and the replaceable opening lining is matched with a process shaft d1 of the spherical valve part.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of spherical valve parts processing, especially relates to a V-shaped clamping jaw device for spherical valve part process reference processing. BACKGROUND

[0002] As Fig. 1-2 The typical spherical valve part is shown in the figure, the blank is a casting, the structure is spherical, the outer spherical surface Sφd of the sphere is a processing surface, the dimensional accuracy, geometric accuracy and surface roughness are required to be strict, is used for opening and cutting off the fluid medium pipeline in the product, the inner spherical surface SφD is a non-processing surface, and the wall thickness of the sphere is only 3mm, so the wall thickness is thin. Fig. 3-4 The blank is composed of two process shafts 1 and 2 with a diameter of φd1 and φd2 and a sphere, and the process reference of the part should be determined first in the rough machining process, and the traditional method for determining the process reference of the part is as follows: an operator directly clamps the process shaft 1 on a numerical control lathe by using the general clamping jaw of a three-jaw chuck, finds the spherical valve outer spherical surface Sφd (close to the side of the process shaft 2) by using a dial gauge, the runout is required to be less than 0.5mm, the process shaft 2 outer circle is then finished, then the process shaft 2 is clamped to finish the process shaft 1, and the process shaft 1 is used as the process reference for subsequent machining of the spherical valve. The clamping jaw structure used in the method is simple, but there are some shortcomings in production, the blank is a fused mold casting, the coaxial error between the blank process shaft and the center axis of the spherical valve is large, the operator spends a lot of time and effort in finding, the coaxial error between the process shaft reference after processing and the sphere is large, after the spherical valve outer spherical surface Sφd and the ΦD1 hole are finished, the ΦD1 hole is scrapped due to the wall thickness of the hole being out of tolerance, the first-time inspection qualified rate of the part is low, and the product delivery requirement cannot be met. The utility model relates to the technical field of spherical valve parts processing, especially relates to a V-shaped clamping jaw device for spherical valve part process reference processing.

[0003] The utility model discloses a purpose: in order to overcome the traditional use three-jaw chuck general clamping jaw directly clamping process shaft on numerical control lathe and processing spherical valve part process reference method exists's insufficient, the utility model discloses a purpose is to provide a new V-shaped clamping jaw, which is light in structure, small in clamping error, convenient to operate, good in geometric accuracy of process reference processing, and high in production efficiency.

[0004] Technical scheme:

[0005] A V-shaped claw device for spherical valve part process reference machining, comprising a V-shaped claw, a replaceable opening bushing, a connecting block, a chuck base, the V-shaped claw is 3 in number and is arranged in a circle, the bottom of the V-shaped claw is connected with the connecting block, the connecting block is matched with the chuck base through a key groove, the V-shaped claw can be limited to left and right displacement, the bottom of the V-shaped claw is provided with a triangular spline, the triangular spline on the bottom of the V-shaped claw is engaged with the triangular spline on the chuck base, so that the V-shaped claw is limited to radial displacement, the inner side of the V-shaped claw is sequentially provided with a first inner taper surface, an inner cylindrical surface, a second inner taper surface and an arc surface from top to bottom, the first inner taper surface and the second inner taper surface are in contact with the surface of the spherical valve part, and the arc surface is matched with the outer cylindrical surface of the replaceable opening bushing in clearance, and the replaceable opening bushing is matched with the process shaft d1 of the spherical valve part.

[0006] Further, the distance between any two adjacent key teeth of the triangular spline on the bottom of the V-shaped claw is 1.5 mm.

[0007] Further, the distance between any two adjacent key teeth of the triangular spline on the chuck base is 1.5 mm.

[0008] Further, the minimum distance between the inner cylindrical surface and the surface of the spherical valve part is 1-2 mm.

[0009] Further, the replaceable opening bushing has a narrow slit structure of 2 mm in the axial direction and is matched with the process shaft φd1 of the spherical valve part in clearance.

[0010] Further, the three V-shaped claws are one-to-one corresponding to be installed on the three chuck bases, the three chuck bases are uniformly distributed at an angle of 120°, the connecting block is connected with the V-shaped claw by using a screw, and the connecting block is connected with the chuck base through T-shaped key groove cooperation.

[0011] Beneficial effects:

[0012] The V-shaped claw device for the spherical valve part process reference machining of the blank as a casting has the characteristics of light structure, small clamping error, convenient operation, good process reference machining form and position precision and high production efficiency, realizes the improvement of the one-time inspection qualified rate of the part under the condition of not improving the cost and precision of the casting blank, and solves the problems of the traditional process of directly clamping the process shaft on the numerical control lathe to machine the spherical valve part process reference by using the three-jaw chuck universal claw. BRIEF DESCRIPTION OF DRAWINGS

[0013] Fig. 1 is a typical spherical valve part schematic Fig. 1 ;

[0014] Fig. 2 is a typical spherical valve part schematic Fig. 2 ;

[0015] Fig. 3Is a typical ball valve part blank schematic Fig. 1 ;

[0016] Fig. 4 Is a typical ball valve part blank schematic Fig. 2 ;

[0017] Fig. 5 Is the utility model single V type clamping jaw and chuck base connection explosion Fig. 1 ;

[0018] Fig. 6 Is the utility model single V type clamping jaw and chuck base connection explosion Fig. 2 ;

[0019] Fig. 7 Is the utility model V type clamping jaw plan view;

[0020] Fig. 8 Is the utility model single V type clamping jaw and chuck base connection structure schematic Fig. 1 ;

[0021] Fig. 9 Is the utility model single V type clamping jaw and chuck base connection structure schematic Fig. 2 ;

[0022] Fig. 10 Is the utility model single V type clamping jaw and chuck base connection structure schematic Fig. 3 ;

[0023] Fig. 11 Is the utility model V type clamping jaw device structure isometric view;

[0024] Fig. 12 Is the utility model V type clamping jaw device clamping part isometric view;

[0025] Fig. 13 Is the utility model V type clamping jaw device clamping part explosion view;

[0026] Among them, 1-V type clamping jaw, 2-screw, 3-replaceable opening bush, 4, first inner conical surface, 5, inner cylindrical surface, 6, second inner conical surface, 7, triangular spline, 8-connection block, 9-chuck base, 10, arc surface. Specific embodiments

[0027] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the embodiments of the present application will be described clearly and completely below in conjunction with the drawings of the embodiments of the present application. Obviously, the described embodiments are some embodiments but not all embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of the present application.

[0028] The features and illustrative embodiments of various aspects of the present application will be described below in detail. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, it will be apparent to one of ordinary skill in the art that the present application can be practiced without some of these specific details. The following description of the embodiments is merely exemplary in nature and is intended to provide a better description of the application. The present application is not limited to any particular specific details of the embodiments set forth below, but covers any and all modifications, equivalents, and alternatives falling within the spirit and scope of the present application. In the drawings and the following description, well-known structures and techniques have not been shown in order to avoid unnecessary obscurity of the present application.

[0029] It should be noted that the features of the embodiments of the present application and the embodiments can be combined with each other without conflict, and each embodiment can be mutually referenced and quoted. The present application will be described in detail below with reference to the drawings and in conjunction with the embodiments.

[0030] Referring to the drawings, the present application provides a V-shaped clamping jaw device for spherical valve part process reference machining, comprising a V-shaped clamping jaw 1, a replaceable open bush 3, a connecting block 8, a chuck base 9, the number of the V-shaped clamping jaw 1 is three, arranged in a circle, the V-shaped clamping jaw 1 bottom is connected with the connecting block 8, the connecting block 8 is matched with the chuck base 9 through a key groove, which can limit the left and right displacement of the V-shaped clamping jaw 1, the V-shaped clamping jaw 1 bottom is provided with a triangular spline 7, the V-shaped clamping jaw 1 bottom triangular spline 7 is engaged with the triangular spline 7 on the chuck base 9, which limits the radial displacement of the V-shaped clamping jaw 1, the inner side of the V-shaped clamping jaw 1 is sequentially provided with a first inner taper surface 4, an inner cylindrical surface 5, a second inner taper surface 6 and an arc surface 10 from top to bottom, the first inner taper surface 4 and the second inner taper surface 6 are in contact with the surface of the spherical valve part, which is used for clamping the outer spherical surface Sφd of the part, the inner cylindrical surface 5 has a minimum distance of about 1-2mm with the spherical surface of the part, which avoids interference when the part is clamped, the arc surface 10 is gap matched with the outer cylindrical surface of the replaceable open bush 3, the replaceable open bush has a narrow slit structure of 2mm along the axial direction, and is gap matched with the process shaft φd1 of the spherical valve part, and the replaceable open bush 3 can realize clamping the process shaft φd1 of the part by elastic shrinkage deformation when clamping stress.

[0031] The distance between any two adjacent key teeth of the triangular spline 7 at the bottom of the V-shaped claw 1 is 1.5 mm, the distance between any two adjacent key teeth of the triangular spline 7 on the chuck base 9 is 1.5 mm, and the triangular spline 7 is the same, so that the engagement is realized.

[0032] The three V-shaped claws 1 are correspondingly installed on the three claw bases 9, the three claw bases 9 are uniformly distributed at an angle of 120°, the connecting block 8 is connected with the V-shaped claw 1 by using the screw 2, and the connecting block 8 is connected with the claw base 9 by means of the T-shaped key groove cooperation.

[0033] During clamping, the operator first installs the three V-shaped claws 1 on the three claw bases 9 which are uniformly distributed at an angle of 120° on the self-centering three-jaw chuck, then fixes and connects the V-shaped claw 1 with the claw base 9 by using the screw 2 through the connecting block 8, then installs the replaceable open bush 3 on the spherical valve part process shaft φd1, then holds the part with the right hand horizontally, places the part between the three V-shaped claws 1, rotates the T-shaped wrench inserted into the square hole of the three-jaw chuck with the left hand, drives the three V-shaped claws 1 to move along the radial direction and gradually clamps the part, visually checks the first inner conical surface 4 and the second inner conical surface 6 of the V-shaped claw 1, and the inner cylindrical surface 5 should be about 1-2 mm away from the maximum diameter of the spherical surface of the part, and should not interfere with the surface of the part, at the same time, the inner cylindrical surface 10 of the V-shaped claw 1 is in contact with the clamping surface of the replaceable open bush 3. Finally, the spindle is rotated by starting the machine tool, the spherical surface of the part exposed to the end surface of the chuck is checked by using the dial gauge, the clamping error is within the tolerance after the first piece is verified, the process shaft φd2 is turned to the size on the drawing, and the process reference for the subsequent part processing is obtained.

[0034] In the embodiment, when the spherical surfaces of the spherical valve parts of the same family and the process shafts thereof have different blank sizes, the corresponding V-shaped claws 1 and replaceable open bushes 3 are replaced according to the needs, so that the part change is realized quickly. Fig. 3 As shown in the figure, the corresponding V-shaped claws 1 and replaceable open bushes 3 are replaced according to the needs, so that the part change is realized quickly.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, but the protection scope of the utility model is not limited to this, any skilled person in the art can easily think of various equivalent modifications or replacements within the technical range disclosed by the utility model, and these modifications or replacements should be covered in the protection scope of the utility model.

Claims

1. A V-shaped chuck device for machining the process reference of spherical valve parts, characterized in that, The device includes V-shaped jaws, a replaceable opening bushing, a connecting block, and a chuck base. There are three V-shaped jaws arranged in a circle. The bottom of each V-shaped jaw connects to the connecting block, which engages with the chuck base via a keyway to restrict the lateral displacement of the V-shaped jaws. A triangular spline is provided at the bottom of the V-shaped jaw, which meshes with a triangular spline on the chuck base to restrict the radial displacement of the V-shaped jaws. From top to bottom, the inner side of the V-shaped jaws is provided with a first inner conical surface, an inner cylindrical surface, a second inner conical surface, and an arc-shaped surface. The first and second inner conical surfaces contact the surface of the spherical valve part, and the arc-shaped surface has a clearance fit with the outer circular surface of the replaceable opening bushing. The replaceable opening bushing engages with the process shaft d1 of the spherical valve part.

2. The V-shaped chuck device for machining the process reference of spherical valve parts according to claim 1, characterized in that, The distance between any two adjacent teeth of the triangular spline at the bottom of the V-shaped claw is 1.5mm.

3. The V-shaped chuck device for machining the process reference of spherical valve parts according to claim 2, characterized in that, The distance between any two adjacent teeth of the triangular spline on the chuck base is 1.5mm.

4. The V-shaped chuck device for machining the process reference of spherical valve parts according to claim 1, characterized in that, The minimum distance between the inner cylindrical surface and the surface of the spherical valve part is 1-2 mm.

5. A V-shaped chuck device for machining the process reference of spherical valve parts according to claim 1, characterized in that, The replaceable open bushing has a narrow slit structure of 2mm along the axial direction, which is clearance-fitted with the process shaft φd1 of the ball valve part.

6. A V-shaped chuck device for machining the process reference of spherical valve parts according to claim 1, characterized in that, Three V-shaped jaws are installed one-to-one on three jaw bases. The three jaw bases are evenly distributed at 120°. The connecting block is connected to the V-shaped jaws using screws. The connecting block and the jaw bases are connected by a T-shaped keyway.

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