CN209189866U - A kind of height-adjustable composite drill bit - Google Patents

Abstract

The utility model discloses a kind of height-adjustable composite drill bits, including main brill part and auxiliary brill part；The main brill part includes the sequentially connected taper brill of head and the tail, drilling rod and hexagonal handle；The outer surface of the drilling rod is equipped with several sliding slots being circumferentially distributed, and is connected between drilling rod and hexagonal handle by the adjusting rod that outer surface is screw thread；Be screwed on restraining position ring block on the adjusting rod；The auxiliary brill part includes being socketed in the counterbit that taper bores and the counterbit loop bar being connected with counterbit tail portion；The bottom end of the counterbit loop bar is equipped with baffle ring, the inner wall of counterbit loop bar is equipped with groove corresponding with sliding slot, groove inner wall, sliding slot inner wall and the baffle ring head collectively constitutes closed slideway, the slideway is provided with sliding block, and the slider width, trough width and recess width are equal two-by-two.The height adjustment of counterbit in compound taper brill is more convenient, quick.

Description

A kind of height-adjustable composite drill bit

Technical field

The utility model relates to composite drill bits.

Background technique

In daily use and industrial production, screw counter sink, that is, spot-facing processed and applied is very extensive.Spot-facing one The head of screw can be embedded among profile by aspect, be guaranteed beautiful；On the other hand, spot-facing guarantees connecing for screw head and profile Contacting surface is horizontal plane, it is ensured that being screwed in the process for screw is always that vertically downward, will not shift phenomenon.

Traditional spot-facing cooked mode is after first being drilled by the drilling machine bored equipped with taper, using the drilling machine ream that counterbit is housed Hole, this cooked mode need two equipment.By manually being drilled respectively, spot-facing two procedures, time-consuming, labour-consuming increases Processing cost, and spot-facing is difficult to the rotation centerline of drilling processing completely to being just overlapped, and machining accuracy is had a greatly reduced quality.

In view of the above problems, compound taper brill starts to receive extensive attention, but existing brill, ream one taper bore, There are two types of mounting means between counterbit and main brill: it is directly fixed that one is jackscrews；Another kind is the non-adjustable structure of welding.Due to ream The height in hole generally requires ceaselessly to be adjusted, so the mounting means of mainstream is that the first jackscrew is directly fixed now.Top Silk is directly fixed to have very strong advantage, on the one hand, its structure is simple, processing technology and its simply；On the other hand, energy is adjusted Power is strong, and range is big.But since counterbit is when processing spot-facing, more big radial force can be born, so jackscrew fixation exists For a long time in use, will appear following defect:

1, biggish radial shear power can not be fought, once loosened screw, counterbit can swing and cause spot-facing processing bad, There is biggish defect in flatness.

2, it can not determine whether jackscrew is installed in place, neophyty operation has certain difficulty.

Utility model content

Purpose of the utility model is to solve the deficiencies of the above prior art and provide a kind of height adjustment is very convenient Compound taper bore.

A kind of height-adjustable composite drill bit, including main brill part and auxiliary brill part；

The main brill part includes the sequentially connected taper brill of head and the tail, drilling rod and hexagonal handle；The outer surface of the drilling rod Several sliding slots being circumferentially distributed are equipped with, are connected between drilling rod and hexagonal handle by the adjusting rod that outer surface is screw thread；Institute Be screwed on restraining position ring block on the adjusting rod stated；

The auxiliary brill part includes being socketed in the counterbit that taper bores and the counterbit loop bar being connected with counterbit tail portion；It is described The bottom end of counterbit loop bar is equipped with baffle ring, and the inner wall of counterbit loop bar is equipped with groove corresponding with sliding slot, the groove inner wall, Sliding slot inner wall and baffle ring head collectively constitute closed slideway, and the slideway is provided with sliding block, the slider width, sliding slot Width and recess width are equal two-by-two.

Preferably, the taper bit head angle is 118 °.

Preferably, the sliding block material is Cr12.

Preferably, the head angle of the counterbit is 90 ° or 120 °.

The utility model has the advantages that

1, by the cooperation of sliding block and slideway, by counterbit in auxiliary brill part in process caused by radial force by sliding Block is born.The sliding block being circumferentially distributed can effectively decompose radial force, and uniformly bear.And sliding block is independence and counterbit With the component of main brill, its own is low in cost, and replacement cost is small, greatly reduces the maintenance cost that whole compound taper is bored.

2, the position by change stop collar on adjusting rod, the height and position that adjustable counterbit is bored relative to taper, Regulative mode is convenient, fast.

Detailed description of the invention

Fig. 1 is a kind of main body schematic diagram of height-adjustable composite drill bit；

Fig. 2 is main brill partial schematic diagram；

Fig. 3 is auxiliary brill partial schematic diagram；

1. main 11. taper of brill part bores auxiliary 21. counterbit of brill part of 12. drilling rod, 13. sliding slot, 14. adjusting rod, 15. hexagonal handle 2. 22. 3. stop collar of counterbit loop bar 221. groove, 23. baffle ring, 4. sliding block.

Specific embodiment

In order to deepen the understanding to the utility model, the utility model is made below in conjunction with embodiment and attached drawing further It is described in detail, which is only used for explaining the utility model, does not constitute the restriction to scope of protection of the utility model.

As shown in Figure 1, a kind of height-adjustable composite drill bit, including main brill part 1 and auxiliary brill part 2；

As shown in Fig. 2, the main brill part 1 includes that the sequentially connected taper of head and the tail bores 11, drilling rod 12 and hexagonal handle 15； The taper bit head angle is 118 °.

The outer surface of the drilling rod is equipped with several sliding slots 13 being circumferentially distributed, and leads between drilling rod 12 and hexagonal handle 15 The adjusting rod 14 that outer surface is screw thread is crossed to be connected；Be screwed on restraining position ring block 3 on the adjusting rod 14；

As shown in figure 3, the auxiliary brill part 2 includes being socketed in the counterbit 21 and be connected with 21 tail portion of counterbit that taper bores Counterbit loop bar 22；The head angle of the counterbit is 120 °.

The bottom end of the counterbit loop bar 22 is equipped with baffle ring 23, and the inner wall of counterbit loop bar 22 is equipped with corresponding with sliding slot 13 Groove 221, the groove inner wall, sliding slot inner wall and baffle ring head collectively constitute closed slideway, and the slideway is provided with Sliding block 4, the slider width, trough width and recess width are equal two-by-two.The sliding block material is Cr12.

Usage mode:

All parts are installed according to Fig. 1, when drilling, the taper bored in part 1 main first bores 11 and touches first and needs The part to be processed, and process screw thread via hole.Then the auxiliary counterbit 21 bored in part 2 touches part, in counterbit loop bar 22 Groove integrally moved upwards relative to sliding block, until stop collar 3 resists counterbit loop bar 22.Auxiliary brill part 2 is no longer upward at this time Movement, counterbit 21 bores 11 with taper and keeps with level-one revolving speed under the drive of sliding block 4, and spot-facing is processed on part.

When needing to adjust spot-facing depth, as long as spot-facing depth can be changed by turn stop collar 3 up and down.

When not in use, baffle ring 23 resists sliding block 4, so that auxiliary brill part 2 will not be separated with main brill part 1.

The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this Within the spirit and principle of utility model, any modification, equivalent replacement, improvement and so on should be included in the utility model Protection scope within.

Claims (4)

1. a kind of height-adjustable composite drill bit, which is characterized in that including main brill part and auxiliary brill part；

The main brill part includes the sequentially connected taper brill of head and the tail, drilling rod and hexagonal handle；It is set on the outer surface of the drilling rod There is the sliding slot that several are circumferentially distributed, is connected between drilling rod and hexagonal handle by the adjusting rod that outer surface is screw thread；Described Be screwed on restraining position ring block on adjusting rod；

The auxiliary brill part includes being socketed in the counterbit that taper bores and the counterbit loop bar being connected with counterbit tail portion；The counterbit The bottom end of loop bar is equipped with baffle ring, and the inner wall of counterbit loop bar is equipped with groove corresponding with sliding slot, the groove inner wall, sliding slot Inner wall and baffle ring head collectively constitute closed slideway, and the slideway is provided with sliding block, the slider width, trough width It is equal two-by-two with recess width.

2. a kind of height-adjustable composite drill bit according to claim 1, which is characterized in that the taper bit head folder Angle is 118 °.

3. a kind of height-adjustable composite drill bit according to claim 1, which is characterized in that the sliding block material is Cr12。

4. a kind of height-adjustable composite drill bit according to claim 1, which is characterized in that the head of the counterbit presss from both sides Angle is 90 ° or 120 °.