CN105033854A - Bit extrusion honing fixture for realizing constant abrasive flow rate - Google Patents

Abstract

The invention provides a drill extrusion honing fixture for realizing constant abrasive flow rate, which is composed of upper abrasive transition plate, upper clamp, lower clamp and lower abrasive transition plate assembled by cylindrical pins, and the drill bit is installed in the round hole of the upper clamp , both sides are fixed with fastening screws, the abrasive fluid medium is filled in the channel between the upper and lower transition discs and the lower clamping, and the abrasive fluid medium in the through hole is repeatedly squeezed back and forth through the upper and lower pistons, and the upper and lower transition discs are connected to the inlet and outlet of the upper and lower transition discs. The equal cross-section design of the inner channel of the lower clamping enables the abrasive flow to honed repeatedly along the spiral groove of the drill bit at a constant pressure and flow rate. The invention realizes the non-contact loading of the drill bit honing, realizes the drill bit honing without damage, improves the surface quality of the drill bit, and prolongs the service life of the drill bit. By arranging a single clamping feature in a circular array, the machining quantity of the drill bit can be changed, and the machining efficiency is high.

Description

A Drill Squeeze Honing Fixture for Constant Abrasive Flow Rate

technical field

The invention relates to a clamping device for drill bit honing, in particular to a clamper for extrusion honing of a drill bit by using an abrasive flow with constant pressure and flow rate.

Background technique

Extrusion honing is a new surface polishing and deburring process in modern times, which has a good effect on the polishing or deburring of molds and parts. Extrusion honing technology is a smoothing method that uses abrasive fluid media (viscous abrasives) with a certain pressure and flow rate to carry out honing. High-efficiency processing methods can effectively improve precision and reduce surface roughness, and remove burrs on the surface of EDM. The extrusion honing is characterized by high efficiency, good quality, simple equipment and convenient operation. Extrusion honing technology can completely remove burrs, thereby improving surface quality and prolonging the service life of parts.

Currently, drill bits are ground with grinding wheels to improve surface quality. In order to better reduce surface roughness and improve the effect of polishing and deburring. Aiming at the deficiencies of the prior art, the present invention uses an abrasive fluid medium (viscous abrasive) with a certain pressure and flow rate to carry out a finishing method for honing, and designs and manufactures a set of drill extrusion honing device to realize constant pressure of abrasive flow and flow rate to reduce the surface roughness of the drill bit, improve the quality of honing and prolong the service life of the drill bit.

The main function of the fixture is to install, clamp the parts, accommodate the medium and guide it through the parts, and more importantly, to control the flow of the medium. Because the fluid is most likely to pass through the path with the shortest distance, the largest cross-section, and the least resistance. In order to guide the medium to the required parts for cutting, some parts of the fixture can be blocked, turned, and interfered to force the viscoelastic abrasive to pass through the parts to be processed. Since this process uses semi-fluid abrasives, the corresponding fixture device must be designed according to the structural characteristics of different parts during polishing, so that the abrasives can pass through the polished surface accurately and reliably. Therefore, the application result of this technology largely depends on the design of the jig device, and the design of the jig device directly affects the polishing quality.

Contents of the invention

In order to improve the surface quality of the drill bit and prolong the working life of the drill bit, the present invention provides a drill bit extrusion honing jig that reduces the surface roughness of the drill bit, improves the surface quality and processing efficiency of the drill bit, and realizes a constant abrasive flow rate.

The technical solution adopted by the present invention to solve its technical problems is:

A drill extruding honing fixture for realizing constant abrasive flow rate, comprising an upper abrasive transition plate, a cylindrical pin, an upper clamp, a lower clamp, a lower abrasive transition plate and an abrasive fluid medium, and the upper and lower ends of the lower clamp are respectively fixedly connected The upper abrasive transition plate and the lower abrasive transition plate, and the lower clamp is fixed to the upper abrasive transition plate and the lower abrasive transition plate through cylindrical pins; the lower clamp and the lower abrasive transition plate are also provided with a channel for the circulation of the abrasive fluid medium A through hole, the upper transition plate of the abrasive is provided with a semi-annular groove for the circulation of the abrasive fluid medium. The hole forms a sealed abrasive fluid medium flow chamber; the upper clamp is located in the through hole of the lower clamp and its upper end is fixedly connected with the upper abrasive transition plate, and the bottom of the upper clamp is provided with a round hole for clamping the drill bit. Both sides of the circular hole are provided with fastening screws for fastening the drill bit.

Further, semi-annular grooves communicating with the through hole are provided on both sides of the through hole of the upper abrasive transition disc. The semi-annular groove can make the abrasive fluid medium flow better in the through hole, and at the same time enable the abrasive transition plate to better position the upper clamping and lower clamping, so that the entire system maintains good sealing.

Further, the lower clamp is fixedly connected to the upper abrasive transition plate and the lower abrasive transition plate through two fixing pins.

Further, the semicircular grooves are a pair of bilateral symmetry.

Further, the entrance area of the two semicircular grooves on the upper abrasive transition disc is equal to the outlet area of the circular hole on the lower transition disc. Equal inlet and outlet areas enable the abrasive fluid medium to hone at a constant speed back and forth along the helical direction of the drill bit.

The working principle of the present invention is as follows: the drill bit is installed in the round hole of the upper clamp, fastened by screws on both sides, the hole between the upper and lower transition plates of the abrasive material and the lower clamp is filled with abrasive fluid medium, and the upper and lower pistons are repeatedly used To squeeze the abrasive fluid medium in the through hole, the seal inside the fixture must be effective.

By pressing the drill bit in the upper clamp, the abrasive fluid medium is delivered to the upper and lower extrusion cylinders. When the upper piston is pressed down, the workpiece enters the lower cylinder to push the lower piston down; when the lower piston is pushed up, the lower piston The abrasive fluid medium of the extrusion cylinder enters the upper extrusion cylinder through the workpiece, and pushes the upper piston to move up, so as to achieve the purpose of polishing the drill bit.

The special feature is that the abrasive fluid medium can be maximized along the helical direction of the drill bit through the equal cross-section design of the semi-annular groove inlet of the upper transition plate, the round hole outlet of the lower transition plate, and the inner round hole channel of the lower clamping Honing back and forth at a constant speed to achieve a constant pressure and flow rate of the abrasive flow.

The beneficial effects of the present invention are mainly manifested in: realizing extrusion honing processing of the drill bit, reducing the surface roughness of the drill bit, improving the surface quality of the drill bit, and realizing non-damage grinding of the drill bit. Multiple drill bits can be processed at the same time, the drill bits can be replaced flexibly, and the processing efficiency is high.

Description of drawings

Fig. 1 is a structural schematic diagram of a drill press honing jig for realizing constant abrasive flow rate according to the present invention.

Fig. 2 is the top view of the transition disk on the abrasive material of the present invention

Figure 3 is an isometric view of the abrasive upper transition plate of the present invention.

Fig. 4 is a front view of the top clamp of the present invention.

Figure 5 is an isometric view of the top clamp of the present invention.

Fig. 6 is a front view of the bottom clamp of the present invention.

Fig. 7 is a top view of the bottom clamp of the present invention.

Figure 8 is a front view of the lower abrasive transition plate of the present invention.

Figure 9 is an isometric view of the abrasive lower transition plate of the present invention.

In the figure, 1-abrasive upper transition disc, 2-cylindrical pin, 3-upper clamping, 4-lower clamping, 5-abrasive lower transition disc, 6-drill bit.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings.

Referring to Figures 1 to 9, a bit extrusion honing jig for achieving a constant abrasive flow rate includes an upper abrasive transition plate 1, a cylindrical pin 2, an upper clamp 3, a lower clamp 4, and a lower abrasive transition plate 5, etc., and the drill bit 6 Placed in the cylindrical hole in the upper clamp 3, the upper clamp and the upper transition plate are fixedly connected by screws, the abrasive upper transition plate 1, the lower fixture 3 and the abrasive lower transition plate 5 are positioned and assembled by cylindrical pins 2, and the abrasive fluid medium is in a certain Under the action of high pressure, it repeatedly slides on the surface of the drill bit, so as to achieve the purpose of reducing the surface roughness of the drill bit.

Fig. 2 and Fig. 3 are the front view and the perspective view of the upper abrasive transition plate of the present invention. Cooperate with installing the upper clamp 3 and the lower clamp 4, the abrasive fluid medium flows through the hole of the upper transition plate 1 of the abrasive.

Fig. 4 is a front view of the upper clamp of the present invention. Connect the upper clamp 3 and the upper abrasive transition plate 1 by screws, place the drill bit 6 to be honed in the middle hole, pass the fastening screws on both sides to fix the drill bit 6 to be honed, and pass the abrasive flow along the spiral groove of the drill bit The direction is repeatedly slipped and honed to achieve the polishing effect.

Fig. 6 and Fig. 7 are the front view and the top view of the bottom clamp of the present invention. The lower clamp 4 is connected with the lower abrasive transition plate 5 through the cylindrical pin 2, and the middle circular hole can flow through the abrasive fluid medium.

Fig. 8 and Fig. 9 are the front view and the isometric view of the lower abrasive transition plate of the present invention. The lower abrasive transition plate 5 is connected to the lower clamp 4 through the cylindrical pin 2, and the middle circular hole can flow through the abrasive fluid medium.

The content described in the embodiments of this specification is only a certain enumeration of the implementation forms of the inventive concept. The protection scope of the present invention should not be regarded as limited to the specific forms stated in the embodiments. The protection scope of the present invention also extends to Equivalent technical means that those skilled in the art can think of according to the concept of the present invention.

Claims (5)

1. A drill bit extruding honing fixture for realizing constant abrasive flow rate, characterized in that: it comprises an upper transition plate, a cylindrical pin, an upper clamp, a lower clamp, an abrasive lower transition plate and an abrasive fluid medium on the abrasive material, and the lower clamping The upper and lower ends are respectively fixedly connected to the upper abrasive transition plate and the lower abrasive transition plate, and the lower clamp is fixed to the upper abrasive transition plate and the lower abrasive transition plate through cylindrical pins; the lower clamp and the lower abrasive transition plate are also equipped with a A through hole for the circulation of the abrasive fluid medium. The upper transition plate of the abrasive is provided with a semi-annular groove for the circulation of the abrasive fluid medium. The semi-annular groove communicates with the through hole, and the semi-annular groove is connected to the lower clamp and The through hole on the lower transition plate forms a sealed abrasive fluid medium flow chamber; the upper clamp is located in the through hole of the lower clamp and its upper end is fixedly connected with the upper transition plate of the abrasive, and the bottom of the upper clamp is provided with a A round hole for clamping the drill bit, and fastening screws for fastening the drill bit are arranged on both sides of the round hole. 2. A drill extrusion honing fixture for constant abrasive flow rate according to claim 1, characterized in that: the two sides of the through hole of the upper abrasive transition plate are also provided with semi-annular grooves communicating with the through hole . 3 . The drill extrusion honing fixture for constant abrasive flow rate according to claim 1 , wherein the lower clamp is fixedly connected to the upper abrasive transition plate and the lower abrasive transition plate through two fixing pins. 4 . 4 . The drill press honing jig for realizing constant abrasive flow rate according to claim 1 , wherein the semicircular grooves are a pair of left and right symmetric grooves. 5. A drill extrusion honing jig for constant abrasive flow rate according to claim 4, characterized in that: the entrance area of the two semicircular grooves on the upper transition disc of the abrasive is equal to the circular hole exit area of the lower transition disc .