CN105312932A - Clamp for drilling holes in round shafts - Google Patents

Abstract

The invention discloses a jig for drilling a circular shaft, and relates to a jig; the jig for drilling a circular shaft includes a base and jaws, and the positions corresponding to the base and the jaws are provided with semicircular through grooves; the base The base is fixed with a polished rod, and there are multiple jaws. One end of the jaws takes the polished rod as the hinge shaft, and the jaws are hinged on the base; A U-shaped opening is provided on the free end of the jaw, and a T-shaped slot parallel to the semicircular through groove is provided on the base corresponding to the U-shaped opening of the jaw, and the bolt head with the bolt is stuck in the T In the groove, the screw rod of the bolt is engaged in the U-shaped opening of the jaw, and the nut is used to fix the free end of the jaw on the base. The circular shaft drilling jig of the present invention has a simple structure and stable clamping; and the position of the clamping jaws can be adjusted by sliding the jaws, so that the jig can adapt to round shafts of various lengths.

Description

A jig for drilling a circular shaft

technical field

The invention relates to a clamp, in particular to a clamp for circular shaft drilling.

Background technique

Round shaft parts are common parts in the machining industry. They are cylindrical in shape, have various specifications, and are mostly made of steel. Drill various joint holes. These holes need to be processed by ordinary vertical radial drilling machine. Due to the different lengths of the short shaft parts, it is necessary to constantly replace the fixture during processing, which consumes manpower and leads to low drilling efficiency.

The application number is 201020285919.7 "Circumferential Drilling Equipment for Circular Shaft Parts", which discloses a circular drilling equipment for circular shaft parts. A disk is arranged on the body, and a long bolt is arranged in the disk, a compression nut is arranged on the left side of the long bolt, and an indexing positioning pin is arranged on the disk. This equipment improves the processing accuracy, but only one round shaft part with one length can be processed at a time.

Contents of the invention

The present invention intends to provide a clamp for drilling circular shafts to overcome the shortcomings of the prior art, so that the clamp can clamp circular shafts of various lengths.

The basic solution of the present invention is a jig for circular shaft drilling, including a base and jaws; semicircular through grooves are opened at the corresponding positions of the base and the jaws; polished rods are fixed on the base, and the clamps There are multiple jaws, one end of the jaws uses the polished rod as the hinge axis, and the jaws are hinged on the base, and the jaws can slide relative to the polished rod; the same polished rod is located in the semicircular groove of the left jaw A baffle is fixed; a U-shaped opening is provided on the free end of the jaw, and a T-shaped slot parallel to the semicircular through slot is provided on the base corresponding to the U-shaped opening of the jaw, and there are bolts The bolt head is clamped in the T-shaped slot, the screw rod of the bolt is engaged in the U-shaped opening of the clamping jaw, and the free end of the clamping jaw is fixed on the base with a nut.

In this basic scheme, the circular shaft is placed in the semicircular through groove on the base, and then the jaws are rotated so that the semicircular through groove on the jaws also cooperates with the workpiece, and the workpiece is pushed to the left jaw On the baffle, fix one side of the round shaft, leave the processed part of the round shaft outside the fixture, and then lock the nut to fix the radial direction of the round shaft. After clamping, the round shaft can be drilled hole operation.

In this solution, the jaws can slide along the polished rod, and a baffle is set on the left end jaw of the polished rod, so that workpieces of different lengths can be positioned by sliding the jaws; the scale set on the polished rod can accurately align The workpiece is limited, so that the drill bit does not need to be positioned every time a workpiece is processed. Since the jaws need to slide on the polished rod, the positions of the bolts on the base are different for different workpieces, so T-shaped slots are set on the base, and the bolts are stuck in the T-shaped slots so that the bolts can slide on the base ;Because the jaw and the base are hinged, in order to make the bolt cooperate with the jaw, a U-shaped opening is set at the free end of the jaw so that the bolt can be inserted into the U-shaped opening; when the nut is locked, the jaw will pass through The friction force between the bolt and the surface of the T-shaped groove is fixed on the base. When the workpiece is pressed against the baffle, the jaws have a tendency to rotate. However, since the jaws are set on the polished rod, the polished rod also has the effect of preventing the gripper from rotating. , so that the jaws can be more stably fixed on the base.

In this solution, by sliding the jaws, the position of the jaws can be adjusted, and as long as the length of the round shafts is within a certain range, the round shafts of various lengths can be clamped.

Preferred option 1, as a further optimization of the basic solution, there are multiple semicircular through slots on the base, and the number of jaws is correspondingly increased; there are multiple semicircular through slots, which can be clamped at the same time Multiple round shafts improve work efficiency.

The second preferred solution, as a further optimization of the basic solution, the inner surface of the semicircular through groove is also provided with an elastic layer; the elastic layer can reduce the friction of the circular shaft in the semicircular through groove, thereby protecting the circular shaft from damaged.

Preferred option three, as a further optimization of the basic solution, the clamping jaws are also provided with fastening screws; when the workpiece is clamped and processed, since the clamping jaws and the polished rod are not in a fixed state in the basic solution, the vibration is relatively large. Large, so a fastening screw is set on the jaw. By tightening the fastening screw, the friction between the polished rod and the jaw can be increased to overcome the vibration of the jaw.

Description of drawings

Fig. 1 is the structural representation of the fixture embodiment of circular shaft drilling;

Fig. 2 is a schematic diagram of the cooperation between the jaws and the base in the embodiment of the jig for drilling a circular shaft.

detailed description

The present invention will be described in further detail below by means of specific embodiments:

The reference numerals in the drawings of the specification include: base 1 , jaw 2 , workpiece 3 , semicircular through slot 11 , polished rod 12 , T-shaped slot 13 , baffle plate 21 , and U-shaped opening 22 .

The embodiment is basically shown in the accompanying drawings: the jig for drilling a circular shaft includes a base 1 and jaws 2; where the corresponding positions of the base 1 and the jaws 2 are provided with semicircular through grooves 11; on the base 1 A polished rod 12 is also provided, and the two ends of the polished rod 12 are provided with a support to fix the polished rod 12 on the base 1, and at the same time, the support makes the polished rod 12 float relative to the base 1; The jaws 2 are hinged on the base 1, while the jaws 2 can also slide relative to the polished rod 12, and four jaws 2 are arranged on the same polished rod 12; A baffle plate 21 is arranged in the semicircular through groove 11, and the baffle plate 21 is welded on the surface of the semicircular through groove 11 to limit the end face of the workpiece 3; Opening 22, and a T-shaped slot 13 parallel to the semicircular through slot 11 is provided on the base 1 corresponding to the U-shaped opening 22 of the jaw 2, and the bolt head with the bolt is stuck in the TT-shaped slot 13 , and the U-shaped opening 22 of the jaw 2 cooperates with the screw rod of the bolt, and then the nut is screwed on to fix the free end of the jaw 2 on the base 1, thereby placing the workpiece 3 in the semicircular through groove 11 Clamp.

As shown in the figure, two semicircular through slots 11 are provided, so that two round shafts can be clamped at the same time, and work efficiency is improved. A scale is also arranged on the polished rod 12. Since the jaws 2 can slide relative to the polished rod 12, and the semicircular through groove 11 of the jaw 2 on the left side on the same polished rod 12 is provided with a baffle 21, it cooperates with the scale and slides. The jaws 2 can position the workpiece 3 to determine the feed rate during rotation.

An elastic layer made of rubber is also provided on the inner surface of the semicircular through groove 11, and the elastic layer can reduce the friction of the circular shaft in the semicircular through groove 11, thereby protecting the circular shaft from damage. In addition, when the workpiece 3 is clamped and processed, if the jaw 2 and the polished rod 12 are not in a fixed state, the vibration will be relatively large; The frictional force between the polished rod 12 and the jaw 2 thus overcomes the vibration of the jaw 2 .

When the circular shaft drilling jig of the present invention is in use, the circular shaft is placed in the semicircular through groove 11 on the base 1, and then the jaws 2 are rotated to make the semicircular through groove 11 on the jaw 2 also Cooperate with the workpiece 3, and push the workpiece 3 to the baffle plate 21 of the left jaw 2, fix one side of the round shaft, leave the processed part of the round shaft outside the fixture, then lock the nut and tighten it Screws can fix the radial direction of the round shaft, and the round shaft can be drilled after clamping.

Claims (4)

1. A clamp for circular shaft drilling, comprising a base and jaws; it is characterized in that, the corresponding positions of the base and the jaws are all provided with semicircular through grooves; the base is fixed with a polished rod, There are multiple jaws, one end of the jaws uses the polished rod as the hinge shaft, and the jaws are hinged on the base, and the jaws can slide relative to the polished rod; A baffle is fixed in the through groove; a U-shaped opening is arranged on the free end of the jaw, and a T-shaped groove parallel to the semicircular through groove is arranged on the base corresponding to the U-shaped opening of the jaw, and The bolt head of the bolt is clamped in the T-shaped slot, the screw rod of the bolt is engaged in the U-shaped opening of the jaw, and the free end of the jaw is fixed on the base with a nut. 2 . The jig for drilling a circular shaft according to claim 1 , wherein there are a plurality of semicircular through grooves on the base, and the number of clamping jaws is correspondingly increased. 3 . 3 . The jig for drilling a circular shaft according to claim 1 , wherein an elastic layer is further provided on the inner surface of the semicircular through groove. 4 . 4 . The jig for drilling a circular shaft according to claim 1 , wherein a fastening screw is further arranged on the clamping jaw. 4 .