CN116276340A

CN116276340A - Special tool for grinding screw tip groove of screw tip tap

Info

Publication number: CN116276340A
Application number: CN202310330487.9A
Authority: CN
Inventors: 孙卫; 赵�权; 赵钢; 方林; 涂刚成
Original assignee: Chengdu Xincheng Tools Co ltd; Chengdu Chengliang Thread Tools Co ltd
Current assignee: Chengdu Xincheng Tools Co ltd; Chengdu Chengliang Thread Tools Co ltd
Priority date: 2023-03-30
Filing date: 2023-03-30
Publication date: 2023-06-23
Anticipated expiration: 2043-03-30
Also published as: CN116276340B

Abstract

The invention relates to the technical field of tap processing tools, in particular to a special tool for grinding a tap tip groove of a tap tip, which comprises a base, a tailstock body, a tip seat adjusting assembly and a spring, wherein the base is fixedly arranged on a machine tool workbench and can horizontally move along with the workbench, the tailstock body is arranged at the top of the base, the tip seat is rotatably arranged at the top of the tailstock body, the tip is arranged at the top of the tip seat, the spring is arranged on one side of the opposite surface of the tailstock body to the tip seat, and the tip seat adjusting assembly for adjusting the inclination angle of the tip seat is arranged on the other side of the tailstock body. According to the invention, the screw tip groove is processed through the combined motion of horizontal movement of the tool and the descending of the left end of the tip seat, and meanwhile, the precision of a product can be ensured.

Description

Special tool for grinding screw tip groove of screw tip tap

Technical Field

The invention relates to the technical field of tap processing tools, in particular to a special tool for grinding a tap tip groove of a tap tip.

Background

The spiral tip tap is also called a tip tap, is suitable for through holes and deep threads, has high use strength, long service life, high cutting speed, stable size and thread cleaning (particularly fine threads), is a variant of a straight flute tap, and is invented by the company NORIS in Germany, sponsor Ernst Reime in 1923. The straight flute is provided with a chute at one side to form an angle, and the cuttings are discharged forwards along the feeding direction. The bevel is a tip groove, and the groove of the tip groove is at an angle relative to the axial direction of the tip tap.

Chinese patent application No.: 201310627231.0 it discloses a spiral tip tap groove machining clamp, including graduation handle, clamping impel handle, portable slip layer board, anchor clamps bottom plate, the graduation handle with clamping impels the handle and cooperatees and be used for fixed work piece, the graduation handle with clamping impels the handle with portable slip layer board fixed connection, portable slip layer board is located the top of anchor clamps bottom plate and rather than fixed connection. The fixture is used for machining the edge inclination angle and the screw tip groove of the screw tap, but the inclination angle of the upper surface of the movable sliding supporting plate is a fixed angle, namely the included angle between the groove direction of the screw tip groove and the axial direction of the screw tip screw tap can only be a fixed angle. However, in the actual production process, the included angles between the tip grooves of the screw taps with different sizes and specifications and the axial direction of the screw taps are not fixed, which means that when the tip grooves of the screw taps with different sizes and specifications are processed in a switching mode, different movable sliding supporting plates are required to be replaced, so that the efficiency is reduced, and the tooling cost is increased.

In addition, in some tap products, the length of the tap flutes is arcuate, which is not possible with the aforementioned patent.

Disclosure of Invention

The invention aims to overcome the defects of the prior art, and provides a special tool for grinding the screw tip groove of the screw tip tap, which can realize the clamping angle adjustment of the screw tip tap by only adjusting the height position of a tip through a tip seat adjusting assembly when processing the screw tip groove of different screw tip taps, has high efficiency when switching different products, does not need a plurality of groups of tools, reduces the tool cost, completes the screw tip groove grinding of the screw tip tap through the horizontal movement of the tool and the descending compound movement of the left end of the tip seat, and can also ensure the self precision of the products.

The aim of the invention is achieved by the following technical scheme:

the utility model provides a special frock for grinding spiral tip tap spiral tip groove, includes base, tailstock body and top, base fixed mounting is on the lathe workstation to can follow workstation horizontal migration, the tailstock body is installed in the top of base, still includes top seat adjusting part and spring, the top of tailstock body rotates installs top seat, top is installed in the top of top seat, the spring is installed with one side of top seat opposite face to the tailstock body, and top seat adjusting part that is used for adjusting top seat inclination is installed to the opposite side.

Further, a rotating hole is formed in the middle of the center seat, a shaft sleeve is embedded in the rotating hole, a rotating shaft is installed in the shaft sleeve, two ends of the rotating shaft are respectively connected with the tail seat body, and the rotating shaft is located between the spring and the center seat adjusting assembly.

Further, top seat adjusting part includes lower cushion, goes up cushion and wedge, still be fixed with the supporting shoe on the lateral wall of tailstock body, the upper end of supporting shoe is fixed with down the cushion, still be fixed with the regulation support on the lateral wall of top seat, the lower extreme of regulation support is fixed with the cushion, it is the slope form to go up the cushion, wedge fixed mounting is on the lathe, the lower surface of wedge can with the upper surface sliding fit of lower cushion, the upper surface of wedge is the slope form, and can with the lower surface sliding fit of last cushion.

Furthermore, top mounting holes are formed in the top of the top seat, the top is installed in the top mounting holes in a sliding fit mode, a plurality of locking screws are screwed on the side walls of the top mounting holes, and the locking screws can be abutted to the side walls of the top.

Further, the upper end of adjusting the support is opened there is the screw hole, threaded hole spiro union has the adjustment handle, the middle part top of top seat is equipped with the spacer pin mount pad, the spacer pin is installed to the sliding fit in the spacer pin mount pad, top, spacer pin and adjustment handle three are coaxial, the front end butt of adjustment handle is at the afterbody of spacer pin, the head butt of spacer pin is at the top tail end.

Further, the device also comprises an initial position adjusting assembly, wherein the initial position adjusting assembly is positioned between the rotating shaft and the center seat adjusting assembly.

Further, initial position adjusting part includes top nail, concave taper pin, protruding taper pin and adjusting screw, top nail is fixed on the top surface of tailstock body, open the downside of top seat has T shape through-hole, concave taper pin sliding fit installs in the transverse hole of T shape through-hole, protruding taper pin sliding fit installs in the longitudinal hole of T shape through-hole, concave taper pin passes through the inclined plane cooperation with protruding taper pin, the transverse hole one end spiro union of T shape through-hole has adjusting screw, adjusting screw's front end butt is in the one end of concave taper pin, the lower extreme of protruding taper pin can with top nail butt.

Further, the concave taper pin is the column, the middle part of concave taper pin is equipped with two concave planes of mutual symmetry, the side of concave taper pin is equipped with concave taper pin main inclined plane and concave taper pin pair inclined plane, concave plane respectively with concave taper pin main inclined plane and concave taper pin pair inclined plane mutually perpendicular, protruding taper pin is the column, the top of protruding taper pin is equipped with two clamp splice of mutual symmetry, is equipped with protruding taper pin main inclined plane between two clamp splice, and one side of two clamp splice is equipped with protruding taper pin pair inclined plane, concave taper pin main inclined plane and protruding taper pin main inclined plane sliding fit, and two clamp splice joint are in the middle part of concave taper pin, and the medial surface of clamp splice is laminated with its concave plane that corresponds.

Further, the top surface of tailstock body has seted up down the groove, the bottom surface of top seat has seted up the upper groove, the lower extreme of spring is fixed in the lower inslot, and the upper end is fixed in the upper groove.

The invention has the following advantages:

1. through the horizontal movement of the tool and the compound movement of the left end of the center seat, the screw tip groove is processed, and meanwhile, the precision of the product can be guaranteed.

2. The wedge blocks with different inclined angles are replaced, so that the included angle between the screw tip groove and the axis of the screw tip tap can be adjusted, the tooling cost is saved, and the switching efficiency is improved.

3. The inclined plane of the wedge block determines the bottom surface of the screw tip groove, namely: if the inclined plane of the wedge block is straight, the bottom surface of the screw tip groove is correspondingly straight, and if the inclined plane of the wedge block is curved, the bottom surface of the screw tip groove is correspondingly curved, so that more possibilities are provided for processing different screw tip grooves, and the tooling cost is further reduced.

Drawings

FIG. 1 is a schematic diagram of the structure of the present invention;

FIG. 2 is a schematic cross-sectional view of FIG. 1 taken along line A-A;

FIG. 3 is a schematic side view of a female taper pin of the present invention;

FIG. 4 is a schematic view of the longitudinal cross-section of the male taper pin of the present invention;

FIG. 5 is a top view of the female and male taper pins of the present invention engaged;

FIG. 6 is a side view of the female and male taper pins of the present invention engaged;

in the figure: the device comprises a 1-base, a 2-tailstock body, a 3-center seat, a 4-center, a 5-center mounting hole, a 6-shaft sleeve, a 7-rotating shaft, an 8-limiting pin mounting seat, a 9-limiting pin, a 10-adjusting bracket, an 11-adjusting handle, a 12-supporting block, a 13-lower cushion block, a 14-initial position adjusting assembly, a 15-upper cushion block, a 16-wedge block, a 17-lower groove, a 18-upper groove, a 19-spring, a 20-top nail, a 21-concave taper pin, a 22-convex taper pin, a 23-adjusting screw, a 24-concave plane, a 25-concave taper pin main inclined plane, a 26-concave taper pin auxiliary inclined plane, a 27-clamping block, a 28-convex taper pin main inclined plane and a 29-convex taper pin auxiliary inclined plane.

Detailed Description

The present invention will be further described with reference to the accompanying drawings, but the scope of the present invention is not limited to the following.

As shown in fig. 1 and fig. 2, a special fixture for grinding a spiral tip groove of a spiral tip tap comprises a base 1, a tailstock body 2 and a tip 4, wherein the base 1 is fixedly arranged on a machine tool workbench and can horizontally move along with the workbench (wherein a guide rail is arranged below the workbench and can horizontally move relative to the machine tool base), the tailstock body 2 is arranged at the top of the base 1, in some embodiments, the transverse relative position between the base 1 and the tailstock body 2 is adjustable, in particular, a transverse waist-shaped hole is formed in the tailstock body 2, a screw penetrates through the waist-shaped hole and is locked and fixed on the base 1, the screw is loosened, the transverse relative position between the base 1 and the tailstock body 2 can be adjusted, after the adjustment is finished, the locking screw can be loosened, the fixture further comprises a tip seat adjusting component and a spring 19, a tip seat 3 is rotatably arranged at the top of the tailstock body 2, the tip seat 3 can rotate within a certain angle range on the tailstock body 2, the tip 4 is arranged at the top of the tip seat 3, when the tip seat 3 rotates, the tip seat 4 is in a certain angle with the rotation of the tip seat 3, the tip seat 3 is in a certain angle component is arranged at the other side of the same time, and the spring seat 19 is inclined and is in a certain angle with the spring seat 3, and the spring seat 3 is arranged at the other side of the same time, and the spring seat is adjusted, and the spring seat 19 is inclined and the angle component is adjusted, and is in a certain angle, and the other side 3 is opposite to the angle, and is adjusted.

Further, as shown in fig. 1, a rotating hole is formed in the middle of the center seat 3, a shaft sleeve 6 is embedded in the rotating hole, a rotating shaft 7 is installed in the shaft sleeve 6, two ends of the rotating shaft 7 are respectively connected with the tailstock body 2, and the rotating shaft 7 is located between a spring 19 and the center seat adjusting assembly. The sleeve 6 and the shaft 7 may be rotatably connected, for example by means of bearings. The shaft 7 and the tailstock 2 may also be rotatably connected, for example by means of bearings. The shaft sleeve 6 can prevent the problems of troublesome replacement and high cost caused by the fact that the rotating shaft 7 is directly contacted with the tip seat 3 after the tip seat 3 is damaged. When the shaft sleeve 6 is damaged, the shaft sleeve 6 is directly replaced.

Further, as shown in fig. 1, the tip seat adjusting assembly includes a lower cushion block 13, an upper cushion block 15 and a wedge block 16, a supporting block 12 is fixed on a side wall of the tailstock body 2, a lower cushion block 13 is fixed at an upper end of the supporting block 12, in this embodiment, the lower cushion block 13 is horizontal, an adjusting bracket 10 is fixed on a side wall of the tip seat 3, an upper cushion block 15 is fixed at a lower end of the adjusting bracket 10, the upper cushion block 15 is inclined, the wedge block 16 is fixedly mounted on a machine tool, a lower surface of the wedge block 16 can be in sliding fit with an upper surface of the lower cushion block 13, and an upper surface of the wedge block 16 is inclined and can be in sliding fit with a lower surface of the upper cushion block 15. Specifically, when the base 1 moves to one side of the wedge block 16, the wedge block 16 is inserted between the lower cushion block 13 and the upper cushion block 15, and along with the increase of the moving distance, the wedge block 16 rotates upwards against the whole of the upper cushion block 15 and the tip seat 3, the tip 4 rotates downwards, and the tip 4 pushes against one end of the tap and moves downwards along with the screw tap, so that the tap is in an inclined state, and a tip groove of the tap can be machined. The angle of inclination of the wedge 16 determines the angle between the screw tip slot and the axis. If the inclined surface of the wedge 16 is straight, the bottom surface of the screw tip groove is correspondingly straight, and if the inclined surface of the wedge 16 is curved, the bottom surface of the screw tip groove is correspondingly curved, which provides more possibility for processing different screw tip grooves.

Further, as shown in fig. 1, a tip mounting hole 5 is formed in the top of the tip seat 3, the tip 4 is slidably mounted in the tip mounting hole 5, a plurality of locking screws are screwed on the side wall of the tip mounting hole 5, and the locking screws can be abutted on the side wall of the tip 4. The position of the center 4 on the center seat 3 is transversely adjustable.

Further, as shown in fig. 1, a threaded hole is formed in the upper end of the adjusting bracket 10, an adjusting handle 11 is screwed in the threaded hole, a limiting pin installation seat 8 is arranged above the middle of the center seat 3, a limiting pin 9 is slidably installed in the limiting pin installation seat 8, the center 4, the limiting pin 9 and the adjusting handle 11 are coaxial, the front end of the adjusting handle 11 is abutted to the tail of the limiting pin 9, and the head of the limiting pin 9 is abutted to the tail end of the center 4. When the position of the center 4 needs to be adjusted, the locking screw is loosened, the center 4 is in an adjustable state, the adjusting handle 11 is rotated, the limiting pin 9 is pushed to move to one side of the center 4, the left side of the center seat 3 at the position of the center 4 is ejected out, and after the position is adjusted to a proper position, the locking screw is locked and fixed. When the center 4 is adjusted to the right side of the center seat 3, the adjusting handle 11 is reversely rotated to push the center 4 to the right side of the center seat 3, so that the right side of the center 4 is abutted on the end face of the limiting pin 9, and after the position of the center 4 is determined, the locking screw is locked and fixed.

Further, as shown in fig. 1, the device further comprises an initial position adjusting assembly 14, wherein the initial position adjusting assembly 14 is positioned between the rotating shaft 7 and the center seat adjusting assembly. When the wedge block 16 is not inserted between the lower cushion block 13 and the upper cushion block 15, the spring 19 rotates towards the other side against one side of the tip seat 3, and the initial position adjusting assembly 14 is arranged on the other side of the tip seat 3 to determine the initial angle of the tip 4.

Further, as shown in fig. 1 and 2, the initial position adjusting assembly 14 includes a top pin 20, a concave taper pin 21, a convex taper pin 22 and an adjusting screw 23, the top pin 20 is fixed on the top surface of the tailstock body 2, a T-shaped through hole is opened at the lower side of the top seat 3, the concave taper pin 21 is slidably mounted in a transverse hole of the T-shaped through hole, the convex taper pin 22 is slidably mounted in a longitudinal hole of the T-shaped through hole, the concave taper pin 21 is in slant fit with the convex taper pin 22, one end of the transverse hole of the T-shaped through hole is in threaded connection with the adjusting screw 23, the front end of the adjusting screw is abutted to one end of the concave taper pin 21, and the lower end of the convex taper pin 22 can be abutted to the top pin 20. The initial position of the center 4 is adjustable, before adjustment, the lower end of the convex oblique pin 22 is pressed on the center pin 20, and the adjusting screw 23 is rotated, so that when the adjusting screw 23 pushes the concave oblique pin 21 to move rightwards, the concave oblique pin 21 presses the convex oblique pin 20 to move downwards relative to the center seat 3, the right side of the center seat 3 is lifted, the left side is lowered, and the initial position of the center 4 is lowered. Conversely, the adjusting screw 23 is reversely rotated, so that the adjusting screw 23 moves leftwards, the concave taper pin 21 moves leftwards under the action of gravity of the tip seat 3, the convex taper pin 20 moves upwards relative to the tip seat 3, the right side of the tip seat 3 is lowered, the left side is lifted, and the initial position of the tip 4 is raised.

In this embodiment, as shown in fig. 3, the concave taper pin 21 is columnar, two concave planes 24 that are symmetrical to each other are provided in the middle of the concave taper pin 21, a concave taper pin main inclined plane 25 and a concave taper pin auxiliary inclined plane 26 are provided on the side surface of the concave taper pin 21, the concave planes 24 are respectively perpendicular to the concave taper pin main inclined plane 25 and the concave taper pin auxiliary inclined plane 26, as shown in fig. 4, the convex taper pin 22 is columnar, two symmetrical clamping blocks 27 are provided on the top of the convex taper pin 22, a convex taper pin main inclined plane 28 is provided between the two clamping blocks 27, one side of the two clamping blocks 27 is provided with a convex taper pin auxiliary inclined plane 29, as shown in fig. 5 and 6, the concave taper pin main inclined plane 25 is slidably matched with the convex taper pin main inclined plane 28, the two clamping blocks 27 are clamped in the middle of the concave taper pin 21, and the inner side surfaces of the clamping blocks 27 are attached to the corresponding concave planes 24. The concave taper pin auxiliary inclined plane 26 is perpendicular to the concave taper pin main inclined plane 25, and the convex taper pin main inclined plane 28 is perpendicular to the convex taper pin auxiliary inclined plane 29. The concave taper pin auxiliary inclined plane 26 and the convex taper pin auxiliary inclined plane 29 are parallel to each other, and when the two inclined planes are attached, the transverse position of the concave taper pin 21 is limited.

Further, as shown in fig. 1, the top surface of the tailstock body 2 is provided with a lower groove 17, the bottom surface of the center seat 3 is provided with an upper groove 18, the lower end of the spring 19 is fixed in the lower groove 17, the upper end is fixed in the upper groove 18, the lower groove 17 and the upper groove 18 together form an installation space of the spring 19, and the spring 19 is prevented from falling out.

When the screw tip groove is machined, the workbench moves towards the wedge block 16, the wedge block 16 is inserted between the lower cushion block 13 and the upper cushion block 15, in the grinding process, the height of the center 4 is changed (the workbench moves towards one side of the wedge block 16 and the center 4 is lowered), the workbench horizontally moves and the center 4 (one end of the screw tip tap) descends to form compound motion, and finally the screw tip tap with the screw tip groove is machined.

Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a special frock for grinding tip screw tap tip groove, includes base (1), tailstock body (2) and top (4), base (1) fixed mounting is on the lathe workstation to can be along with workstation horizontal migration, the top in base (1) is installed in tailstock body (2), its characterized in that: still include top seat adjusting part and spring (19), top seat (3) are installed in the rotation of the top of tailstock body (2), top (4) are installed in the top of top seat (3), spring (19) are installed to one side of tailstock body (2) and top seat (3) opposite face, and top seat adjusting part that is used for adjusting top seat (3) inclination is installed to the opposite side.

2. The special fixture for grinding the tip groove of the spiral tap according to claim 1, wherein: the center seat (3) is provided with a rotating hole, a shaft sleeve (6) is embedded in the rotating hole, a rotating shaft (7) is arranged in the shaft sleeve (6), two ends of the rotating shaft (7) are respectively connected with the tailstock body (2), and the rotating shaft (7) is positioned between a spring (19) and the center seat adjusting assembly.

3. A special fixture for grinding tip flutes of a tap according to claim 1 or 2, characterized in that: the center seat adjusting assembly comprises a lower cushion block (13), an upper cushion block (15) and a wedge block (16), wherein a supporting block (12) is further fixed on the side wall of the tailstock body (2), the lower cushion block (13) is fixedly arranged at the upper end of the supporting block (12), an adjusting bracket (10) is further fixedly arranged on the side wall of the center seat (3), an upper cushion block (15) is fixedly arranged at the lower end of the adjusting bracket (10), the upper cushion block (15) is in an inclined shape, the wedge block (16) is fixedly arranged on a machine tool, the lower surface of the wedge block (16) can be in sliding fit with the upper surface of the lower cushion block (13), and the upper surface of the wedge block (16) is in an inclined shape and can be in sliding fit with the lower surface of the upper cushion block (15).

4. A special fixture for grinding a pointed tap tip groove as claimed in claim 3, wherein: the top of top seat (3) has seted up top mounting hole (5), top (4) slip fit installs in top mounting hole (5), the spiro union has a plurality of locking screw on the lateral wall of top mounting hole (5), locking screw can the butt on the lateral wall of top (4).

5. The special fixture for grinding the tip groove of the spiral tap as claimed in claim 4, wherein: the utility model discloses a tip, including adjusting support (10), tip seat (3), locating pin mount pad (8), tip (4), locating pin (9) and adjusting handle (11) three coaxial are installed in the upper end of adjusting support (10), threaded hole spiro union has adjusting handle (11), the middle part top of tip seat (3) is equipped with locating pin mount pad (8), the interior sliding fit of locating pin mount pad (8) installs locating pin (9), the front end butt of adjusting handle (11) is at the afterbody of locating pin (9), the head butt of locating pin (9) is at the tail end of top (4).

6. A special fixture for grinding a pointed tap tip groove as claimed in claim 3, wherein: the automatic centering device further comprises an initial position adjusting assembly (14), wherein the initial position adjusting assembly (14) is positioned between the rotating shaft (7) and the centering seat adjusting assembly.

7. The special fixture for grinding the tip groove of the spiral tap of claim 6, wherein: initial position adjusting part (14) are including top nail (20), concave taper pin (21), protruding taper pin (22) and adjusting screw (23), top nail (20) are fixed on the top surface of tailstock body (2), open the downside of top seat (3) has T shape through-hole, protruding taper pin (21) sliding fit installs in the transverse bore of T shape through-hole, protruding taper pin (22) sliding fit installs in the longitudinal bore of T shape through-hole, concave taper pin (21) pass through inclined plane cooperation with protruding taper pin (22), transverse bore one end spiro union of T shape through-hole has adjusting screw (23), adjusting screw's front end butt is in the one end of concave taper pin (21), the lower extreme of protruding taper pin (22) can with top nail (20) butt.

8. The special fixture for grinding the tip groove of the spiral tap as claimed in claim 7, wherein: the concave taper pin (21) is columnar, two concave planes (24) which are symmetrical with each other are arranged in the middle of the concave taper pin (21), a concave taper pin main inclined plane (25) and a concave taper pin auxiliary inclined plane (26) are arranged on the side face of the concave taper pin (21), the concave planes (24) are respectively perpendicular to the concave taper pin main inclined plane (25) and the concave taper pin auxiliary inclined plane (26), the convex taper pin (22) is columnar, two clamping blocks (27) which are symmetrical with each other are arranged at the top of the convex taper pin (22), a convex taper pin main inclined plane (28) is arranged between the two clamping blocks (27), a convex taper pin auxiliary inclined plane (29) is arranged on one side of the two clamping blocks (27), the concave taper pin main inclined plane (25) is in sliding fit with the convex taper pin main inclined plane (28), the two clamping blocks (27) are clamped at the middle of the concave taper pin (21), and the inner side faces of the clamping blocks (27) are attached to the corresponding concave planes (24).

9. The special fixture for grinding the tip groove of the spiral tap according to claim 1, wherein: the tail seat is characterized in that a lower groove (17) is formed in the top surface of the tail seat body (2), an upper groove (18) is formed in the bottom surface of the center seat (3), the lower end of the spring (19) is fixed in the lower groove (17), and the upper end of the spring is fixed in the upper groove (18).