Inner cavity supporting device for cylindrical part machining

Abstract

The invention discloses an inner cavity supporting device for cylindrical part machining. The inner cavity supporting device comprises a front supporting sleeve, a rear supporting sleeve, a clamping block, a clamping ring, a pull rod and pull rod driving equipment. The front end of the pull rod is inserted into an inner cavity of the front supporting sleeve, the clamping blocks are installed in the clamping block positioning holes of the front supporting sleeve respectively, the outer ring of the front supporting sleeve is sleeved with the clamping blocks, and the clamping blocks are limited in the clamping block positioning holes of the front supporting sleeve in the radial direction. The front end of the rear supporting sleeve is fixed with the rear end of the front supporting sleeve; and the pull rod driving equipment is installed between the inner bottom of the rear supporting sleeve and the rear end of the pull rod, the pull rod driving equipment drives the pull rod to move backwards, and the pull rod pushes the clamping blocks to extend outwards in the radial direction through the circular truncated cone positioning section to clamp the inner wall of the cylindrical blank. According to the inner cavity supporting device, the cylindrical part with an irregular molded surface at the opening part is reliably supported.

Description

Technical Field

[0001] This invention relates to an internal cavity support device for machining cylindrical parts, belonging to the field of cylindrical part machining technology. Background Technology

[0002] In the processing of a certain cylindrical part, to save costs and reduce processing time, the blank for the cylindrical part is formed by extruding cylindrical bar stock through a stamping process. The stamped blank is characterized by a black skin on the inner and outer surfaces, and an irregular horseshoe shape is extruded at the opening. To provide a reference for subsequent machining and reduce wall thickness differences, a center hole needs to be drilled in the center of the end plate at the front end of the stamped blank. This center hole is crucial and is used until the finishing process is complete.

[0003] Currently, the support fixtures used for drilling center holes require a tapered mandrel to support the inner cavity opening of the blank. Due to the irregular horseshoe shape of the blank opening, it is not easy to place the blank correctly, which increases the wall thickness difference and also brings a lot of workload to the operator. Summary of the Invention

[0004] The purpose of this invention is to solve the problems of inaccurate positioning and difficult positioning operations when using traditional processes to support cylindrical parts with irregular shapes at the opening. Therefore, this invention provides an internal cavity support device for machining cylindrical parts.

[0005] The objective of this invention is achieved through the following technical solution:

[0006] The present invention provides an internal cavity support device for machining cylindrical parts, comprising a front support sleeve, a rear support sleeve, a clamping block, a clamping ring, a pull rod, and a pull rod driving device;

[0007] The outer diameter of the front support sleeve matches the inner diameter of the cylindrical blank. A set of circumferentially distributed locking and positioning holes are opened on the side wall of the front support sleeve. An annular connecting platform is provided on the outer edge of the rear port of the front support sleeve.

[0008] The outer edge of the front end of the rear support sleeve is machined with an annular connecting platform corresponding to the rear end of the front support sleeve.

[0009] The upper end of the card block is an arc-shaped positioning surface corresponding to the inner wall of the cylindrical blank. A retaining ring positioning groove is opened along the circumferential direction on the arc-shaped positioning surface of the card block. The middle shape of the card block matches the hole shape of the positioning hole of the front support sleeve card block. The lower end of the card block is provided with a forward-expanding frustum surface.

[0010] The inner diameter of the retaining ring matches the inner diameter of the front support sleeve;

[0011] The front end of the pull rod is a support section that matches the inner diameter of the front support sleeve, and the rear end of the pull rod support section is a frustum positioning section that corresponds to the lower end of the locking block.

[0012] The front end of the pull rod is inserted into the inner cavity of the front support sleeve, and the truncated cone positioning section of the pull rod is axially aligned with the positioning holes of each locking block of the front support sleeve; each locking block of the front support sleeve is respectively installed in the positioning holes of the locking block, the locking ring is sleeved on the outer ring of the front support sleeve, and the locking ring passes through the locking ring positioning groove of each locking block, so that each locking block is radially limited in the positioning holes of the locking block of the front support sleeve;

[0013] The annular connecting platform at the front end of the rear support sleeve is fixed to the annular connecting platform at the rear end of the front support sleeve with screws; the pull rod drive device is installed between the inner bottom of the rear support sleeve and the rear end of the pull rod, and the pull rod drive device drives the pull rod to move backward, and the pull rod pushes each clamp block to extend radially outward through the frustum positioning section to clamp the inner wall of the cylindrical blank.

[0014] Beneficial effects

[0015] The internal cavity support device of the present invention has a simple structure and is easy to manufacture. It can reliably support cylindrical parts with irregular openings, greatly reducing the labor intensity of workers. At the same time, it can straighten the blank, reduce the influence of the horseshoe shape at the opening of the blank, and reduce the influence of wall thickness difference during subsequent processing. Attached Figure Description

[0016] Figure 1 This is a structural diagram of the internal cavity support device of the present invention;

[0017] Figure 2 This is a diagram showing the working state of the internal cavity support device of the present invention;

[0018] Among them, 1-pull rod drive device, 2-pull rod, 3-rear support sleeve, 4-front support sleeve, 5-clamping block, 6-clamping ring, 7-cylindrical blank to be positioned. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0020] Example

[0021] like Figure 1 As shown, an internal cavity support device for processing cylindrical parts according to the present invention includes a front support sleeve 4, a rear support sleeve 3, a clamping block 5, a clamping ring 6, a pull rod 2, and a pull rod driving device 1;

[0022] The outer diameter of the front support sleeve 4 matches the inner diameter of the cylindrical blank 7. A set of circumferentially distributed locking positioning holes are opened on the side wall of the front support sleeve 4. An annular connecting platform is provided on the outer edge of the rear port of the front support sleeve 4.

[0023] The outer edge of the front end of the rear support sleeve 3 is machined with an annular connecting platform corresponding to the rear end of the front support sleeve 4.

[0024] The upper end of the locking block 5 is an arc-shaped positioning surface corresponding to the inner wall of the cylindrical blank 7. A locking ring positioning groove is opened along the circumferential direction on the arc-shaped positioning surface of the locking block 5. The middle shape of the locking block 5 matches the hole shape of the locking block positioning hole of the front support sleeve 4. The lower end of the locking block 5 is provided with a forward-expanding frustum surface.

[0025] The inner diameter of the retaining ring 6 matches the inner diameter of the front support sleeve 4;

[0026] The front end of the pull rod 2 is a support section that matches the inner diameter of the front support sleeve 4, and the rear end of the support section of the pull rod 2 is a frustum positioning section that corresponds to the lower end of the locking block 5.

[0027] The front end of the pull rod 2 is inserted into the inner cavity of the front support sleeve 4, and the frustum positioning section of the pull rod 2 is axially aligned with the positioning holes of each locking block of the front support sleeve 4; each locking block 5 is installed in the positioning hole of the front support sleeve 4, and the retaining ring 6 is sleeved on the outer ring of the front support sleeve 4, and the retaining ring 6 passes through the retaining ring positioning groove of each locking block 5, so that each locking block 5 is radially limited in the positioning hole of the locking block of the front support sleeve 4; the annular connecting platform at the front end of the rear support sleeve 3 is fixed to the annular connecting platform at the rear end of the front support sleeve 4 with screws; the pull rod drive device 1 is installed between the inner bottom of the rear support sleeve 3 and the rear end of the pull rod 2.

[0028] like Figure 2 As shown, when positioning the cylindrical blank 7, the front end of the front support sleeve 4 is inserted into the inner cavity of the cylindrical blank 7, so that the positioning holes of each locking block of the front support sleeve 4 are located in the inner cavity of the cylindrical blank 7; the pull rod drive device 1 drives the pull rod 2 to move backward, and the frustum positioning section of the pull rod 2 pushes each locking block 5 to extend radially outward, clamping the inner wall of the cylindrical blank 7.

Claims

1. An internal cavity support device for machining cylindrical parts, characterized in that, Includes front support sleeve, rear support sleeve, clamping block, clamping ring, tie rod and tie rod drive device; The outer diameter of the front support sleeve matches the inner diameter of the cylindrical blank. A set of circumferentially distributed locking and positioning holes are opened on the side wall of the front support sleeve. An annular connecting platform is provided on the outer edge of the rear port of the front support sleeve. The outer edge of the front end of the rear support sleeve is machined with an annular connecting platform corresponding to the rear end of the front support sleeve. The upper end of the card block is an arc-shaped positioning surface corresponding to the inner wall of the cylindrical blank. A retaining ring positioning groove is opened along the circumferential direction on the arc-shaped positioning surface of the card block. The middle shape of the card block matches the hole shape of the positioning hole of the front support sleeve card block. The lower end of the card block is provided with a forward-expanding frustum surface. The inner diameter of the retaining ring matches the inner diameter of the front support sleeve; The front end of the pull rod is a support section that matches the inner diameter of the front support sleeve, and the rear end of the pull rod support section is a frustum positioning section that corresponds to the lower end of the locking block. The front end of the pull rod is inserted into the inner cavity of the front support sleeve, and the truncated cone positioning section of the pull rod is axially aligned with the positioning holes of each locking block of the front support sleeve; each locking block of the front support sleeve is respectively installed in the positioning holes of the locking block, the locking ring is sleeved on the outer ring of the front support sleeve, and the locking ring passes through the locking ring positioning groove of each locking block, so that each locking block is radially limited in the positioning holes of the locking block of the front support sleeve; The annular connecting platform at the front end of the rear support sleeve is fixed to the annular connecting platform at the rear end of the front support sleeve with screws; the pull rod drive device is installed between the inner bottom of the rear support sleeve and the rear end of the pull rod, and the pull rod drive device drives the pull rod to move backward, so that the pull rod pushes each clamp block to extend radially outward through the frustum positioning section, clamping the inner wall of the cylindrical blank.

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