CN217922395U

CN217922395U - Anode movable chromium plating device for deep hole inner wall of slender pipe

Info

Publication number: CN217922395U
Application number: CN202221927415.XU
Authority: CN
Inventors: 刘科言; 林彤; 张必良; 姜黎明; 杨建军; 陈林; 侯冬冬; 陈梨; 王宪升
Original assignee: Chongqing Jianshe Industry Group Co Ltd
Current assignee: Chongqing Jianshe Industry Group Co Ltd
Priority date: 2022-07-25
Filing date: 2022-07-25
Publication date: 2022-11-29
Anticipated expiration: 2032-07-25

Abstract

The utility model discloses a slender pipe deep hole inner wall anode movable chromium plating device, which has strong automation, reliable positioning and controllable process. The automatic centering device comprises a moving device body, a groove body, a clamp, an upper extension pipe and a lower extension pipe, wherein the moving device comprises a vertical arm, an upper moving device and a lower moving device, a lead yielding pipe is fixed on the upper moving device, an anode rod is fixed at the lower end of the lead yielding pipe, the anode rod is connected with a power anode through a lead, the lower end of the lower moving device is fixed with a tubular workpiece self-centering device, the anode rod penetrates through a central hole of the workpiece self-centering device, the clamp is connected with a power cathode through the lead, the clamp comprises an upper disc and a lower disc, the upper disc and the lower disc are connected through a stand column, the upper disc is fixed at the opening of the groove body, a radial positioning hole of the upper extension pipe is formed in the upper disc, the lower disc is located in the groove body, and a lower positioning sleeve which is tubular is arranged on the lower disc.

Description

Anode movable chromium plating device for deep hole inner wall of slender pipe

Technical Field

The utility model relates to the technical field of electroplating, in particular to a long-slender tube deep hole inner wall anode movable chromium plating device.

Background

In order to improve the wear resistance and ablation resistance of the inner wall of a deep hole of an elongated tube (such as a barrel) under high-pressure, high-speed and high-temperature environments, the inner wall of the deep hole needs to be subjected to chromium plating.

At present, the scheme adopted for plating chromium on the inner wall of a deep hole of an elongated tube is as follows: the two ends of a slender pipe are respectively clamped by an upper cap and a lower cap, a specially-made anode rod with other metal materials plated on the surface is sequentially inserted into a central hole of the lower cap, an inner hole of the slender pipe and a central hole of the upper cap, the anode rod is straightened and tensioned under the action of a special tensioning device to be coaxial with the inner hole of the slender pipe, then the anode rod is locked by the wedging action of a wedging device in the upper cap, and the anode rod, the upper cap, the lower cap and the slender pipe are assembled into an integral chromium plating clamping device.

Because the prior chromium plating device adopts the upper cap part and the lower cap part which are made of common steel materials to realize the assembly of the gun barrel, the upper cap and the lower cap and the assembly of the anode rod, the upper cap and the lower cap through clearance fit, and the assembly of the anode rod, the upper cap and the lower cap are easy to corrode and dissolve in chromic anhydride solution in the chromium plating process, and the fit clearance between the gun barrel, the anode rod, the upper cap and the lower cap is gradually increased due to the abrasion after the anode rod is used for many times, so that the anode rod deviates from the axis position of an inner hole of the gun barrel, and the plating thickness is eccentric and uneven. Meanwhile, for the slender tube with the length of more than 500mm and extremely thick chromium plating, the current density uniformity still shows the trend of attenuation from two ends of the slender tube to the middle in the chromium plating process to a certain degree, so that the thickness uniformity of the chromium plating layer on the inner wall of the slender tube is greatly influenced, the service performance of the product is reduced, and the one-time off-line qualification rate is low.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects of the prior art, and provides a long-tube deep-hole inner wall anode movable chromium plating device which has strong automation, reliable positioning and controllable process.

The purpose of the utility model is realized like this:

an anode movable chromium plating device for the inner wall of a long and thin tube deep hole comprises a moving device, a groove body, a clamp, an upper extension tube and a lower extension tube, wherein the upper extension tube and the lower extension tube are used for installing a workpiece, the moving device comprises a vertical arm, an upper moving device and a lower moving device are arranged on the vertical arm in a sliding fit manner, the upper moving device and the lower moving device are respectively driven by a driving device,

go up and be fixed with the wire on the mobile device and let the position pipe, the wire lets the lower extreme of position pipe be fixed with the anode rod, the anode rod passes through the wire and connects the power positive pole, the anode rod includes crosses electric pull rod, positive pole steel wire, the positive pole steel wire is arranged in inserting the hole of work piece, it is used for driving positive pole rod reciprocating motion to go up the mobile device, the lower extreme of mobile device is fixed with and is the pipy work piece from the centring means down, the anode rod passes the work piece from the centre bore of centring means, the work piece is the horn mouth from the lower extreme of centring means, and the work piece is used for pressing on last extension pipe from the lower extreme horn mouth of centring means, to last extension pipe, work piece location, the mobile device is used for driving the work piece from the up-down movement of centring means,

anchor clamps pass through the wire and connect the power negative pole, anchor clamps include hanging wall, lower wall, through stand joint support between hanging wall, the lower wall, the oral area at the cell body is fixed to the hanging wall, be equipped with the radial locating hole of last extension pipe on the hanging wall, the lower wall is located the cell body, be equipped with on the lower wall and be pipy lower position sleeve, be the horn mouth on the lower position sleeve, the upper end horn mouth of lower position sleeve is used for the top on lower extension pipe, to lower extension pipe, work piece location.

Preferably, a rigid linear guide rail is arranged on the vertical arm, sliding blocks are respectively arranged on the upper moving device and the lower moving device, the sliding blocks are matched with the rigid linear guide rail, and the sliding blocks are driven by a driving device.

Preferably, the driving device is a servo motor, and the servo motor drives the sliding block through a screw and nut mechanism or a push rod mechanism.

Preferably, the opposite ends of the upper extension pipe and the lower extension pipe are provided with stepped holes for matching with the workpiece hole shaft and positioning through steps.

Preferably, a protective sleeve is attached to the outer circle of the over-current pull rod and used for preventing the bath solution from being corroded; the vertical arm is fixed on one side of the groove body; the anode rod is fixed at the lower end of the lead abdicating tube through the anode rod locking chuck; the lead yielding pipe is in threaded fit with the upper moving device and is locked through a nut.

Preferably, the both sides of hanging wall are equipped with journal stirrup one, journal stirrup two, journal stirrup one is the cylinder structure, is equipped with the round hole on the journal stirrup two, and the top of cell body is equipped with half slot, step shaft, and the upper end of step shaft is the circular cone, journal stirrup one is fixed a position with the half slot joint, journal stirrup two is fixed a position with the step shaft grafting.

Preferably, the upper end of the anode steel wire is in threaded fit with an upper righting sleeve, the lower end of the anode steel wire is in threaded fit with a lower righting sleeve, and the upper righting sleeve and the lower righting sleeve are used for being matched with a central hole of a workpiece to enable the anode steel wire to be coaxial with the central hole of the workpiece.

Preferably, the upper extension pipe is positioned below the liquid level of the tank body.

Since the technical scheme is used, the utility model discloses following beneficial effect has:

the utility model discloses it is automatic strong, the location is reliable, the process is controllable, through shortening positive pole length, increase upper and lower extension pipe part, through servo motor control positive pole at slender pipe inner wall reciprocating motion realization timesharing sectionalized accurate formula electroplate, let the even deposit of cladding material successive layer at slender pipe inner wall surface, promote slender pipe inner wall chromium plating quality and a off-line qualification rate, promoted the performance of product by a wide margin, higher economic benefits and social have.

Drawings

FIG. 1 is a diagram of the apparatus of the present invention;

FIG. 2 is a top view of FIG. 1;

fig. 3 is a schematic structural view of a mobile device of the present invention;

FIG. 4 is a schematic view of the anode rod structure of the present invention;

fig. 5 is a schematic view of the clamp structure of the present invention;

fig. 6 is a schematic structural view of the upper extension pipe and the lower extension pipe of the present invention.

Reference numerals

In the drawings, 1-mobile device; 2-an anode rod; 3, clamping; 4-an elongated tube; 5-a groove body; 6-standing the arm; 7-rigid linear guides; 8-a slide block; 9-upper moving means; 10-upper servo motor; 11-a lead abdication tube; 12-a nut; 13-an insulating spacer; 14-anode rod locking chuck; 15-lower moving means; 16-lower servo motor; 17-workpiece self-centering means; 18-an over current draw bar; 19-a protective sleeve; 20-installing a centering sleeve; 21-anodic steel wire; 22-lower righting sleeve; 23-upper dish; 24-upper extension tube; 25-upright post; 26-a downward extension pipe; 27-lower positioning sleeve; 28-lower disc; 29-a first lug; 30-a semicircular groove; 31-a second lug; 32-stepped shaft.

Detailed Description

The following describes the present invention in further detail with reference to the accompanying drawings.

Referring to fig. 1-3, an anode moving type chromium plating device for the inner wall of a deep hole of a slender tube controls the anode to reciprocate on the inner wall of the slender tube to realize time-sharing segmented precise electroplating, the device comprises five parts, namely a moving device 1, an anode rod 2, a clamp 3, a slender tube (workpiece) 4 and a groove body 5, wherein an upper moving device 9 and a lower moving device 15 respectively control a slide block 8 to move up and down along a rigid linear guide rail 7 through an upper servo motor 10 and a lower servo motor 16; the anode rod 3 is vertically fixed at the lower end of the upper moving device 9 through an anode rod locking chuck 14 and penetrates through a central hole of a workpiece self-centering device 17 on the lower moving device 15; during chromium plating, the anode of the power supply is connected with the anode rod 2 through the lead abdicating tube 11, the cathode of the power supply is connected with the clamp 3, and the anode steel wire 21 on the anode rod 3 is movably plated with chromium in the central hole of the slender tube (workpiece) 4 along with the up-and-down movement of the upper moving device 9. An insulating gasket 13 is fixed at the lower end of the upper moving device 9.

As shown in fig. 4, a protective sleeve 19 is attached to the outer circle of the over-current pull rod 18 to prevent the bath solution from corroding, an anode steel wire 21 is connected to the lower end of the over-current pull rod 18 through thread fit with an upper centering sleeve 20 and a lower centering sleeve 22, and the upper centering sleeve 20 and the lower centering sleeve 22 can ensure that the anode steel wire 21 is coaxial with the central hole of the elongated tube (workpiece) 4;

as shown in fig. 5, the upper extension pipe 24 is matched with a coarse positioning hole of an upper disc 23 of the fixture 3, the lower extension pipe 26 is matched with a lower positioning sleeve 27 on a lower disc 28 of the fixture 3, so as to realize clamping and coarse positioning of the slender pipe, the whole fixture 3 is suspended at the mouth of the tank body 5 through two lugs of the upper disc 23, wherein a first lug 29 is of a cylindrical structure and is matched with a semicircular groove 30 on the tank body 5, a second lug 31 is provided with a circular hole and is matched with a stepped shaft 32 erected on the tank body, the upper end of the stepped shaft is conical and is led in through the circular hole of the second lug 31, a workpiece self-centering device 17 on the lower moving device 15 and the upper extension pipe 24 on the fixture 3 are installed together in a hole-shaft matching mode, and through the clamping cap, the axis of the anode rod and the axis of the slender pipe can be on the same straight line, and the concentricity of the anode rod and the slender pipe can be ensured.

As shown in FIG. 6, a slender tube (workpiece) 4, an upper extension tube 24 and a lower extension tube 26 are clamped between an upper disc 23 and a lower disc 28 of the fixture 3, the outer circles of the large end and the small end of the slender tube (workpiece) 4 are respectively matched with the upper extension tube 24 and the lower extension tube 26 by small gaps, the inner hole diameters of the upper extension tube 24 and the lower extension tube 26 are basically consistent with the inner hole diameter of the slender tube (workpiece) 4, and the two holes are coaxial and are used as an extension of the inner hole of the slender tube, so that the end face of the inner hole of the slender tube is ensured to be uniform in geometric structure and shape with other parts, and the local electric field caused by the abrupt change of the end face structure of the inner hole is prevented from changing, the end face current is not uniformly distributed, and the local thickness of the end face of the inner hole is not uniform or the inner hole has no plating layer.

Through the chromium plating device, the anode is controlled by the servo motor to reciprocate on the inner wall of the slender tube to realize time-sharing and sectional accurate electroplating, so that the plating layer is uniformly deposited on the surface of the inner wall of the slender tube layer by layer, the chromium plating quality of the inner wall of the slender tube and the one-time off-line qualification rate are improved, and the chromium plating quality of the inner wall is greatly improved.

Finally, the above preferred embodiments are only intended to illustrate the technical solution of the invention and not to limit it, while the invention has been described in detail by the above preferred embodiments, it should be understood by those skilled in the art that various changes in form and details may be made therein without departing from the scope of the invention defined by the claims.

Claims

1. An anode movable chromium plating device for the inner wall of a deep hole of a slender pipe is characterized in that: comprises a moving device, a groove body, a clamp, an upper extension pipe and a lower extension pipe, wherein the upper extension pipe and the lower extension pipe are used for installing a workpiece, the moving device comprises a vertical arm, an upper moving device and a lower moving device are in sliding fit with the vertical arm, the upper moving device and the lower moving device are respectively driven by a driving device,

the anchor clamps pass through the wire and connect the power negative pole, anchor clamps include hanging wall, lower wall, through stand joint support between hanging wall, the lower wall, the oral area at the cell body is fixed to the hanging wall, be equipped with the radial locating hole of last extension pipe on the hanging wall, the lower wall is located the cell body, be equipped with on the lower wall and be pipy lower position sleeve, be the horn mouth on the lower position sleeve, the upper end horn mouth of lower position sleeve is used for pushing up on the extension pipe of downwardly extending, fixes a position extension pipe, work piece.

2. The elongated tube deep hole inner wall anode moving type chromium plating device according to claim 1, wherein: the vertical arm is provided with a rigid linear guide rail, the upper moving device and the lower moving device are respectively provided with a sliding block, the sliding blocks are matched with the rigid linear guide rail, and the sliding blocks are driven by a driving device.

3. The elongated tube deep hole inner wall anode moving type chromium plating device according to claim 2, wherein: the driving device is a servo motor, and the servo motor drives the sliding block through a screw rod nut mechanism or a push rod mechanism.

4. The elongated tube deep hole inner wall anode moving type chromium plating device according to claim 1, wherein: the opposite ends of the upper extension pipe and the lower extension pipe are provided with stepped holes which are used for being matched with a workpiece hole shaft and being positioned through steps.

5. The elongated tube deep hole inner wall anode moving type chromium plating device according to claim 1, wherein: a protective sleeve is attached to the outer circle of the over-current pull rod and used for preventing the bath solution from being corroded; the vertical arm is fixed on one side of the groove body; the anode rod is fixed at the lower end of the lead abdicating tube through the anode rod locking chuck; the lead abdicating pipe is in threaded fit with the upper moving device and is locked by a nut.

6. The elongated tube deep hole inner wall anode moving type chromium plating device according to claim 1, wherein: the two sides of the upper plate are provided with a first support lug and a second support lug, the first support lug is of a cylindrical structure, a round hole is formed in the second support lug, a semicircular groove and a stepped shaft are arranged at the top of the groove body, the upper end of the stepped shaft is a cone, the first support lug is clamped and positioned with the semicircular groove, and the second support lug is spliced and positioned with the stepped shaft.

7. The elongated tube deep hole inner wall anode moving type chromium plating device according to claim 1, wherein: the upper end of the anode steel wire is in threaded fit with an upper righting sleeve, the lower end of the anode steel wire is in threaded fit with a lower righting sleeve, and the upper righting sleeve and the lower righting sleeve are used for being matched with a central hole of a workpiece, so that the anode steel wire and the central hole of the workpiece are coaxial.

8. The elongated tube deep hole inner wall anode moving type chromium plating device according to claim 1, wherein: the upper extension pipe is positioned below the liquid level of the tank body.