CN104029050B - Coated jig for drill press for pilot hole of shift fork - Google Patents

Abstract

The present invention relates to a kind of drilling machine special fixture of shift fork pilot hole, comprise clamp body, pressing plate, lining, drill bushing, base, vee-block, backing pin, pullover, screw rod, nut, support, drill bushing is positioned on fixture pressing plate, and be fixedly connected with fixture pressing plate, be provided with removable lining between drill bushing and fixture pressing plate, pressing plate is fixedly connected on clamp body top; The shifting fork positioning mechanism be made up of vee-block, base, backing pin is fixedly connected with below pressing plate, before clamp body, the spiral rewind clamp system that shifting fork positioning mechanism is made up of screw rod, pullover, nut, handle previously by support installing, support is fixedly connected on clamp body.The present invention improves on conventional brace basis, has that friction and abrasion is strong, the life-span is high, low cost of manufacture, position error are little, clamping is simple, production efficiency high.

Description

Coated jig for drill press for pilot hole of shift fork

technical field

The invention relates to a special fixture for a shift fork guide hole drilling machine with a physical vapor deposition diamond-like coating, which is suitable for drilling guide holes of a large batch of a type of machine tool headstock variable speed shift fork with a similar structure.

Background technique

At present, the special fixtures for shift fork parts on the market are generally customized. When machining large quantities of parts, the machining factory usually develops, processes and manufactures special fixtures by itself. The disadvantage of using special fixtures is that the wear of the special fixtures will gradually increase during mass production and clamping, which will affect the clamping accuracy and reduce the accuracy of the product, and the components need to be replaced frequently and the design and manufacturing cycle is long. Large, resulting in low production efficiency. The present invention aims at the structure and processing technology of the shift fork parts of the speed change mechanism of the spindle box of the machine tool, and designs a practical diamond-like coating treated by physical vapor deposition, which has high wear resistance and is used for the processing of the guide holes of the shift fork. Drilling fixtures play a big role in production.

Contents of the invention

The present invention is to improve the guiding mechanism and clamping mechanism of some former special fixtures for shifting forks, and carry out physical vapor deposition diamond-like coating treatment on the guiding and clamping mechanisms, so as to provide a coating fixture for drilling machines with guiding holes for shifting forks. , after the V-shaped block, stop pin, and drill sleeve are treated with diamond-like coating, the wear resistance of the fixture is enhanced, and the clamping and machining accuracy are further improved, which solves the low wear resistance, gradually decreasing precision and poor efficiency of the fixture. , frequent replacement of components, redesign and manufacture, etc., make the operation easier for workers, thus greatly improving the production efficiency of large quantities of parts.

The technical solution adopted by the present invention to achieve the above object is: a coating fixture for a drilling machine with a shift fork guide hole, including a clamp body, a pressure plate, a bushing, a drill sleeve, a base, a V-shaped block, a stop pin, a sleeve head, and a screw rod , nuts, and brackets, which are characterized by: the drill sleeve is located on the clamp platen and is fixedly connected with the clamp platen, a replaceable bush is provided between the drill sleeve and the fixture platen, and the pressure plate is fixedly connected to the top of the clamp body; under the pressure plate, the clamp Specifically, the front is fixedly connected with a shift fork positioning mechanism composed of a V-shaped block, a base, and a stop pin. The front of the shift fork positioning mechanism is equipped with a screw fast-reverse clamping mechanism composed of a screw, a sleeve, a nut, and a handle. The bracket is fixedly connected to the clip. Specifically.

The surface of the V-shaped block, the surface of the stop pin, the inner wall of the drill sleeve, and the inner wall of the stop pin hole of the clamp body are all coated with diamond coating. The V-shaped block is fixed on the vertical surface of the clamp body, and its positioning surface is perpendicular to the base. The base is fixed on the horizontal plane of the clamp body with countersunk screws, and its positioning surface is placed horizontally. The central hole of the bracket is connected with a screw rod, the front end of the screw rod is connected with a sleeve, and the rear end of the screw rod is connected with a handle, and is locked and fixed with a nut.

The beneficial effects of the present invention are:

The entire fixture consists of two main parts, the clamp body and the pressure plate. The clamp body, V-shaped block, and stop pin are treated with diamond-like coating, which can effectively enhance the friction and wear performance of the component and the hole processing efficiency. The clamp body and the pressure plate are connected by bolts, the overall rigidity is good, it is not easy to deform during processing, and can maintain good processing accuracy. The clamping force of the clamping mechanism of this fixture is mainly provided by the screw mechanism. It has the characteristics of large clamping force, stable clamping force, and self-locking function of the clamping mechanism. The screw mechanism has a fast retreat groove, which can Greatly improve the efficiency of workers in clamping and reduce labor intensity.

When the jig is used to process the holes of shift fork parts with similar structure, it can be quickly refitted into a suitable drilling jig by replacing the jig pressure plate, drill bushing, bushing, V-shaped block and other parts, reducing the manufacturing cost of the factory jig and improving the special purpose. The utilization rate of fixtures has practical significance in the production process.

Description of drawings

Fig. 1 is a partial sectional view of the structure of the present invention;

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

detailed description

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

As shown in Figures 1 and 2, the shift fork guide hole drilling jig with a diamond-like coating of the present invention includes a screw 1, a washer 2, a base 3, a clamp body 4, a positioning pin 5, a bolt 6, and a hexagon socket head cap screw 7 , washer 8, positioning pin 9, drill sleeve 10, compression screw 11, bushing 12, pressure plate 13, V-shaped block 14, stop pin 15, screw 16, sleeve head 17, screw rod 18, nut 19, bracket 20, pressure plate 21 , handle 22.

The locating pin, the V-shaped block 14, the drill sleeve 10, and the inner wall of the retaining pin hole of the clamp body 4 are treated with a diamond-like coating, and the drill sleeve is located on the clamp pressure plate 13, and the replaceable drill sleeve 10 is adopted, and the compression screw 11 is used for fixing. Add replaceable bushing 12 in the drill sleeve hole of pressing plate 13. The pressing plate 13 is connected with the chuck body 4 by hexagon socket head cap screws 7, and can be replaced when drilling shift forks of different specifications. The positioning of shift fork adopts V-shaped block 14, annular hollow base 3 and stop pin 15 to carry out positioning. The V-shaped block 14 is fixed on the vertical surface of the clamp body 4 with hexagon socket head screws, the positioning surface is perpendicular to the base 3, the base 3 is fixed on the horizontal plane of the clamp body 4 with countersunk screws, the positioning surface is placed horizontally, and the retaining pin 15 is inserted into the clamp Specifically, in the hole processed on 4, the degree of freedom of the shift fork rotating around the Z axis during drilling is limited. The screw rod 18, sleeve head 17, nut 19, handle and other parts constitute the screw fast-rewind clamping mechanism of the fixture, which is installed in the hole of the bracket 20, and the bracket 20 is fixed on the clamp body with hexagon socket screws, and the axis of the bracket hole is aligned with the V-shaped block. The positioning datum composed of the positioning surface is vertical. The central hole of the bracket 20 is connected with the screw rod 18, the front end of the screw rod 18 is connected with the sleeve head 17, and the rear end of the screw rod 18 is connected with the handle 22, and is locked and fixed with a nut 19. When clamping, the screw rod 18 can quickly withdraw from the clamping, and there is a considerable distance from the part, so that the fork part can be taken out from the clamp conveniently.

Claims (4)

1. the drilling machine coated fixture of a shift fork pilot hole, comprise clamp body (4), pressing plate (13), lining (12), drill bushing (10), base (3), vee-block (14), backing pin (15), pullover (17), screw rod (18), nut (19), support (20), it is characterized in that: described drill bushing (10) is positioned on fixture pressing plate (13), and be fixedly connected with fixture pressing plate (13), be provided with removable lining (12) between drill bushing (10) and fixture pressing plate (13), pressing plate (13) is fixedly connected on clamp body (4) top; Below pressing plate (13), before clamp body (4), be fixedly connected with the shifting fork positioning mechanism be made up of vee-block (14), base (3), backing pin (15), shifting fork positioning mechanism installs the spiral rewind clamp system be made up of screw rod (18), pullover (17), nut (19), handle (22) previously by support (20), support (20) is fixedly connected on clamp body (4).

2. the drilling machine coated fixture of shift fork pilot hole according to claim 1, is characterized in that: the backing pin hole inwall of the surface of described vee-block (14), the surface of backing pin (15), drill bushing (10) inwall, clamp body (4) all scribbles diamond coatings.

3. the drilling machine coated fixture of shift fork pilot hole according to claim 1, it is characterized in that: described vee-block (14) is fixed in clamp body (4) vertical elevation, its locating surface is perpendicular to base (3), base (3) sunk screw is fixed on clamp body (4) horizontal plane, its locating surface is horizontal positioned, and backing pin (15) inserts in the hole that clamp body (4) processes.

4. the drilling machine coated fixture of shift fork pilot hole according to claim 1, it is characterized in that: the centre bore connecting screw rod (18) of described support (20), screw rod (18) front end connects pullover (17), screw rod (18) rear end connecting handle (22), and is locked with nut (19).