What Is a Drill Jig?

Drilling jig, a machine tool fixture used to guide a tool to drill (see drilling) or ream (see reaming) a workpiece.

Drilling die is a tooling fixture to assist drilling

Ensure the position of the drilling die, improve the drilling efficiency, and reduce the technical requirements of workers.

1, flange, 2, motor plate, 3, base, 4, hydraulic valve block, 5, cover plate, 6, nut, 7, gasket. 8, shafts, etc.

Processing mode of drilling die

Old: Finish the drill template and press the drill sleeve into it.

New: [Patented Product: Packing Drilling Die] Position the drill sleeve in a certain environment first, and then cast the packing end cap, which is suitable for using the drilling die hydraulic valve block and the drilling die flange type drilling die

Used to determine the position of the workpiece relative to the tool (drill, reaming drill, reamer, etc.) on the drilling machine, and to perform drilling, expansion, reaming, etc. while maintaining the same relative position through the tightening and other measures The devices are called drill press fixtures, referred to as drill dies. Drill dies typically have a variety of drill sleeves that guide and determine the position of the tool. There are many types of drilling dies, which are often divided into the main types of fixed, mobile, flat, rotary, flip and slide. When designing, the corresponding structural form should be reasonably selected according to the shape, size, processing requirements and production batch of the workpiece, as well as the type and specification of the machine tool used ^[1]

The structural characteristics of the drilling die are that in addition to the positioning and clamping devices of the workpiece, there are also drill sleeves and drilling templates set according to the position distribution of the processed holes to determine the position of the tool and prevent the tool from tilting during processing. , Which guarantees

Selection of main types of drilling dies

When designing the drilling die, firstly, the structure type of the fixture should be selected according to the shape, size, weight and processing requirements of the workpiece, and considering the specific conditions such as the production batch and the technical conditions of the factory process equipment. When choosing, you should pay attention to the following points:

(1) When machining small and medium-sized workpieces with a hole diameter larger than 10ram, a fixed drilling die should be used because of the large drilling torque.

(2) Turning and free-moving drilling dies are suitable for processing small and medium-sized parts, and the total weight including the workpiece should not exceed 100N (10kgf). Otherwise, a drill with a rotary or linear indexing device should be used.

(3) When processing several parallel hole systems that are not on the concentric circle, such as the total weight of the workpiece and fixture exceeds 150N (15kgf), it is advisable to use a fixed drilling die for processing on a radial drilling machine. If the production volume is large, it can be processed on a vertical drilling machine or combined machine with a multi-axis drive head.

(4) For small and medium-sized workpieces that do not require high verticality and accuracy of the hole spacing, a plunger drilling die should be preferred to shorten the design and manufacturing cycle of the fixture. If the vertical tolerance of the hole is less than 0.1mm, and the tolerance of the hole distance is less than ± 0.15mm, this type of drilling mold is generally not suitable unless special measures are taken.

(5) If the drilling template and clamp are specifically designed for welding structure, the welding stress cannot be completely eliminated and the accuracy cannot be maintained for a long time. Therefore, it is generally used only when the tolerance of the workpiece pitch is not high (greater than ± 0.15mm).

(6) When the distance tolerance or hole distance tolerance between the hole being processed and the positioning reference of the workpiece is less than 0.05mm, a fixed drilling die and a fixed drilling sleeve should be used for processing.

(7) When machining holes located on the same plane on large workpieces, to simplify the structure of the fixture, a flat-plate drill can be used ^[2]

Sample drilling dies are mainly used for making sample mounting holes. Because the spot welding samples are all thin plates, under laboratory conditions, the single-piece sample is processed and installed, and the position accuracy is difficult to guarantee and the efficiency is low. To this end, this testing machine system has designed a drilling die, which can put 20 pieces of samples in the drilling die for installation at the same time. The position of the mounting hole is guaranteed by the drilling die, with high accuracy and high processing efficiency ^{[3 ]} .