WO2003035317A1 - Werkzeughalter für ein kreiszylindrisches gewindeschneideisen - Google Patents
Werkzeughalter für ein kreiszylindrisches gewindeschneideisen Download PDFInfo
- Publication number
- WO2003035317A1 WO2003035317A1 PCT/DE2002/003834 DE0203834W WO03035317A1 WO 2003035317 A1 WO2003035317 A1 WO 2003035317A1 DE 0203834 W DE0203834 W DE 0203834W WO 03035317 A1 WO03035317 A1 WO 03035317A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- handle
- bolt
- recess
- thread
- holder
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23G—THREAD CUTTING; WORKING OF SCREWS, BOLT HEADS, OR NUTS, IN CONJUNCTION THEREWITH
- B23G1/00—Thread cutting; Automatic machines specially designed therefor
- B23G1/26—Manually-operated thread-cutting devices
- B23G1/261—Die and tap wrenches
- B23G1/263—Die wrenches having a cylindrical opening and a clamping screw
Definitions
- the invention relates to a tool holder for a circular cylindrical
- Threading tool according to the preamble of claim 1.
- This holder is known from DE 40 37 982 A1.
- an intermediate ring is provided, which several
- Base ring d. H. Pockets of the jacket of the receiving pot and on the other hand protrude into recesses on the outer jacket of the cutting iron.
- Locking position of the intermediate ring aligns one of the retaining bolts with one of the
- This handle can be screwed or unscrewed into the jacket of the receptacle. As a result, an additional shark force is exerted on the die via this shank pin.
- Tool holders with intermediate rings are also known from DE 40 29 812 C1,
- Usual thread cutter holders have several screws, which in the
- Jacket of the receiving pot are screwed in and penetrate and in
- the object of the invention is to replace the known thread-cutting tool holder with a design which is safe from accidents and injuries and which is simple to manufacture and not more expensive than the one provided with screws
- the retaining bolt is moved in the clamping direction by screwing in the handle. It is not necessary for the handle and clamping bolt to be coupled to one another in such a way that when the handle is unscrewed, the clamping bolt is also moved back again and disengaged; because in the embodiment according to claim 7 it is sufficient for the removal of the cutting iron from the receiving pot that the clamping force is removed.
- the cutting force during thread cutting is transmitted from the die through the holding groove of the die, through the handle or the holding bolt connected to it, and through its guidance onto the tool holder. For this reason, it is important that the retaining bolt in the casing or its opening is securely guided with a sufficiently large guide surface.
- An advantageous embodiment of the opening results from claim 8.
- hexagonal or octagonal cross-sections have the advantage that they have a circumscribing circle (envelope circle) that is only slightly larger when the circle is large; it can therefore be avoided that the internal thread intended for receiving the handle has to be cut and damaged by inserting the polygon.
- the preferred developments of the invention provide a coupling between the handle and the retaining bolt and that this coupling serves in particular the purpose that the bolt can be rotated relative to the handle and, moreover, is not lost when the cutting tool is removed.
- the retaining boizen is preferably provided with an axial projection, which in the Guide strikes in such a way that the retaining bolt cannot fall out of its guide if there is no cutting tool in the holding pot. Suitable further developments for a clutch result from claims 9-13.
- a coupling between the handle and the retaining bolt is sufficient, which permits the relative rotary movement of the handle, but axially entrains the retaining bolt when the handle is unscrewed (claim 9).
- Such a coupling can be realized with simple means by pairing a radial projection and a circumferential groove in which the projection engages (claim 10).
- such a coupling is realized by a thread pairing. This simplifies and accelerates the tensioning / unclamping process.
- a sufficient tensioning force can be applied, whereby this embodiment also has the advantage that a translation between the thread movements takes place due to the design of the thread, but in particular an elegant assembly of the retaining bolt and the handle allows.
- the thread of the handle in the tool holder and the thread of the handle bolt in the handle interact in such a way that the retaining bolt can only be released from the handle by screwing the handle to a substantial extent, preferably completely, into the tool holder in the clamping direction. So there must be no cutting tool in the holder of the tool holder.
- the handle cannot be unscrewed from the tool holder in the relaxed direction until the retaining bolt has been released by screwing in the handle.
- the thread lengths are designed so that when the handle is unscrewed, the retaining bolt is completely screwed into the internal thread of the handle and is then prevented from rotating by its rotational lock before the handle is completely unscrewed.
- Handle and retaining bolt thus mutually secure against one being inadvertently removed from the tool holder.
- the introduction of the guide into the jacket of the receptacle is difficult if the jacket cannot be manufactured as a casting. This difficulty is avoided in the embodiment of the invention according to claim 13.
- the approach for receiving the screw-in handle is produced as an independent component.
- This component is manufactured as a cylindrical or rod-shaped body made of steel.
- the receptacle which is also preferably made of steel in this embodiment, is given a radial hole into which the end fits into one end. Before doing so, however, a threaded hole is made in the insert from one side and a passage for the retaining bolt from the other side.
- the polygonal passage can e.g. B. by compressing the pin mitteis a driven in the end face polygonal tool. It is also possible to screw the pin to the jacket of the receptacle.
- Figure 1 A die holder with inserted die
- Figure 4A-4C further embodiments for connecting couplings between
- Threaded coupling and clamping bolt and handle Fig. 6 the attachment of the approach to the pot of the
- a threading tool 1 is shown. It consists of the tool holder 2 and the threading die 3.
- the threading die is a circular cylindrical body with a central hole in which the thread cutting clips radially for cutting a particular thread in a pin, z. B. protrude to produce a screw.
- a special die is required for each thread size.
- the dies of a certain thread / size range have the same outside diameter and can be inserted and clamped in the same tool holder. However, they may have different thicknesses.
- the tool holder 2 has a receiving pot 4 for the die 3.
- This pot 4 has a circular cylindrical casing 20. It is open at the top and down through a bottom 21 with a correspondingly large through hole, for. B. recognizable in Figure 3, provided.
- the dies of different thread sizes generally have different heights; it is not necessary that the height of the receiving pot 4 also corresponds to the thickness of the dies.
- Two approaches 5 are formed on the receiving pot, z. B. cast on. As will be explained later, at least the attachment 5, which is intended for screwing in the handle, can be produced as a separate component and subsequently connected to the jacket, e.g. B. screwed or welded. The approaches 5 are offset from each other by 180 °. The lugs 5 are used to hold or fasten the fixed handle 6 and the movable handle 7.
- the handle 6 is also cast or screwed into the lug 5 and then wedged.
- the handle 7, however, is screwed into an internal thread of the extension 5 by an external thread.
- Both handles 6 + 7 are provided with a suitable corrugation 10 so that they can be gripped non-slip.
- the embodiment according to FIG. 2A has a handle 7, which at the same time also serves as a holding bolt.
- the end of the handle which protrudes into the central recess 4 of the exception pot, is provided with a tip.
- This tip serves to engage in a recess 13 on the outer circumference of the cutting tool, which can be designed as a groove, hole, depression.
- the threaded hole, into which the handle is screwed, is drilled or cut through in one go into the central recess of the receptacle.
- the tip is designed as an independent body 12 which is rotatably mounted on the end of the handle in question.
- This body 12 has a pin 16 which projects into a recess made in the end face of the handle.
- the pin 16 has at its end a collar 24 with which the tip is axially guided and secured against falling out by means of a union nut which is screwed onto the end face of the handle.
- FIG. 4B shows a modification of the embodiment according to FIG. 2B.
- the body 12 with the tip 15 of the handle - as previously described - is guided in the handle and also clamped in the direction of the cutting tool in relation to the handle by a compression spring.
- the front of the tip 15 is designed in cross-section as a prism, ie as a square or preferably: hexagon or octagon, and is guided in a similarly designed passage 11 of the jacket 20 of the receiving pot, as was described above in connection with FIGS. 3a, 3b.
- the tip 15 as a prism edge and the recess 13 on the circumference of the cutting tool as a groove, as previously described in connection with Figure 3.
- FIGS. 3a, 3b show a design of the receiving pot which is suitable for configurations of the handles and retaining bolts according to FIGS. 4A, 4B, 4C. All these designs have in common that the retaining bolt 12 can make a relative rotation with respect to the handle 7 and is guided in a rotationally secured manner. The following applies in particular:
- a hole, passage, opening 11 is made in the jacket 20 of the receptacle 4. This hole 11 is aligned with the threaded bore of the handle 7 in the shoulder 5.
- the receptacle is shown in an axial section perpendicular to the handle 7 with a view of hole 11. It can be seen that the hole 11 merges into the threaded bore of the handle 7.
- FIG. 3b shows that the holding bolt 12 is inserted into the hole 11 and that the hole 11 and the holding bolt 12 have a congruent cross section. The dimensioning is such that the retaining bolt can move freely in the radial direction, but fits tightly and snugly on the side surfaces of the passage 11 and in particular on the guide surface 19 of the passage 11.
- This guide surface is essentially aligned with the threaded bore 8 of the attachment 5, into which the handle 7 can be screwed.
- This guide surface is spanned in a plane parallel to the screwing direction and parallel to the axis of the receptacle 4 and serves to guide the retaining bolt 12.
- the function of this guide surface is to guide the retaining bolt straight in the screwing direction of the handle 7 and to hold the retaining bolt at every tilting movement to prevent.
- the guide surface 19 also has to absorb the cutting forces which are exerted on the holding bolt 12 during the thread cutting via the die 3.
- the holding bolt 12 has a guide surface that is congruent with the guide surface 19.
- FIG. 3c shows - in the same representation as FIG. 3a - an exemplary embodiment in which the opening 11 is designed as a polygon, here as an equilateral hexagon.
- a hexagonal cross-section of this type has the advantage that its hollow circle is only slightly larger than its inscribed circle.
- the internal thread introduced into the attachment is made larger with its outer diameter than the inscribed circle of the polygon.
- the inside diameter is also made equal to or larger than the envelope circle of the polygon, as shown. This makes it possible for the retaining bolt to be inserted into the casing of the receiving pot from both sides. It is not necessary to insert the retaining bolt from the inside and the handle from the other side.
- the holding bolt 12 has on its side facing the die an edge 15 facing the die 3, which is aligned axially parallel to the axis of the receiving pot 4 or the die 3 inserted therein.
- the edge is z. B. formed in that the front of the retaining bolt 12 is prism-shaped.
- the edge 15 protrudes in the clamping position into a groove 13 in the outer jacket of the cutting iron 3. This groove is also aligned parallel to the axis of the cutting iron.
- FIGS. 4A, 4B, 4C differ essentially in the connection between the holding bolt 12 and the screw-in handle 7.
- a pin 16 is firmly connected, for example screwed in firmly.
- the pin 16 has a circumferential groove 22 in the region of its end.
- a radial ball 23 engages in this groove, which is introduced into a radial bore in the handle and, in the installed state, is pressed into the circumferential groove 22 by a spring. This ensures that when the handle is unscrewed, the clamping boizen 12 is also held and taken with it, if it is not intended to separate the two by exerting a special force.
- the clamping force is applied in that the free end face of the pin 16 strikes the corresponding end face of the blind hole 17.
- the length ratios can also be chosen so that the end face of the handle strikes the retaining bolt 12, the pin 16 completely immersed in the blind hole. In any case, the ball 23 detaches from the groove 22 beforehand.
- a thread pairing is provided as the coupling pairing.
- the holding bolt 12 also has a fixed pin 16. This is, however, provided at its free end with an external thread which meshes with an internal thread in the blind hole 17.
- the external thread 9 of the handle 7 is directed opposite to the internal thread of the pin 16. Therefore, when the handle 7 is screwed into the neck 5, the pin 6 is unscrewed from the handle. This means that the distance between the holding edge 15 of the clamping bolt 12 approaches the clamping position at a greater speed than the speed which is predetermined by the thread pitch of the handle 7. This is particularly beneficial when the external thread 9 of the handle, which is used to apply the clamping force, is designed as a fine thread, ie thread with a small pitch.
- the thread pairing of the pin 16 can be a normal metric thread or a thread with an even greater pitch. It can also be a bayonet-type connection. It is only essential that the slope in the connection pin / blind hole is reversed to the slope in the connection handle 7 / attachment 5, tool holder.
- the version according to Fig. 6 is particularly suitable for large diameter threading dies.
- the tool holder is made of steel.
- the extension 5 is produced as an independent cylindrical component made of steel.
- the jacket of the receptacle has a cylindrical hole.
- the extension has a twist on its outer circumference at the end with which the extension is inserted into the hole in the jacket.
- the diameter of this twist corresponds to the diameter of the hole and its length to the thickness of the jacket 20 of the receptacle. Compared to the remaining length of the attachment, the twist forms a collar 28 which strikes the jacket.
- the shoulder Prior to this, the shoulder is provided with an internal bore that runs the entire length. One end of this inner bore is forged or pressed into a polygonal cross section. This area then serves as a passage and guide for the congruently shaped retaining pin 12, which was previously described. An internal thread is cut into the bore at the other end, but does not touch the essential part of the polygonal cross section. This internal thread later serves to screw in the handle 7, as previously cut.
- the neck is then, as described, inserted into the hole 26 of the jacket and fastened therein. For this purpose, it can be welded to the jacket, as shown. However, a threaded connection can also be provided for the hole and the turning of the extension.
- the particular advantage of the invention is that holding forces are applied only at one point of the cutting iron and that in particular the very high shear forces are used, which are absorbed in the boundary between the cutting iron and the cylindrical recess by the clamping bolt 12 by means of a broad, flat support on the guide surface 19. A multiple voltage can therefore be avoided.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Milling Processes (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10294826T DE10294826D2 (de) | 2001-10-16 | 2002-10-11 | Werkzeughalter für ein kreiszylindrisches Gewindeschneideisen |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10150470 | 2001-10-16 | ||
DE10150470.5 | 2001-10-16 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2003035317A1 true WO2003035317A1 (de) | 2003-05-01 |
Family
ID=7702332
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE2002/003834 WO2003035317A1 (de) | 2001-10-16 | 2002-10-11 | Werkzeughalter für ein kreiszylindrisches gewindeschneideisen |
Country Status (2)
Country | Link |
---|---|
DE (1) | DE10294826D2 (de) |
WO (1) | WO2003035317A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107414212A (zh) * | 2017-09-21 | 2017-12-01 | 姚前华 | 一种外螺纹加工装置 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR518323A (fr) * | 1920-06-30 | 1921-05-23 | Leon Alphonse Ferment | Porte-filière |
GB211200A (en) * | 1922-11-11 | 1924-02-11 | Bsa Tools Ltd | Improvements in or relating to die stocks and screwing dies |
GB616546A (en) * | 1946-03-12 | 1949-01-24 | Latham Valentine Stewart Black | Improvements relating to stocks and dies |
FR2380839A1 (fr) * | 1977-02-22 | 1978-09-15 | Przemyslu Narzedziowego K | Etrier de filiere pour filetage manuel |
US4556348A (en) * | 1984-05-17 | 1985-12-03 | Liou Mou T | Combined tap and die holder |
-
2002
- 2002-10-11 WO PCT/DE2002/003834 patent/WO2003035317A1/de active Application Filing
- 2002-10-11 DE DE10294826T patent/DE10294826D2/de not_active Expired - Fee Related
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR518323A (fr) * | 1920-06-30 | 1921-05-23 | Leon Alphonse Ferment | Porte-filière |
GB211200A (en) * | 1922-11-11 | 1924-02-11 | Bsa Tools Ltd | Improvements in or relating to die stocks and screwing dies |
GB616546A (en) * | 1946-03-12 | 1949-01-24 | Latham Valentine Stewart Black | Improvements relating to stocks and dies |
FR2380839A1 (fr) * | 1977-02-22 | 1978-09-15 | Przemyslu Narzedziowego K | Etrier de filiere pour filetage manuel |
US4556348A (en) * | 1984-05-17 | 1985-12-03 | Liou Mou T | Combined tap and die holder |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107414212A (zh) * | 2017-09-21 | 2017-12-01 | 姚前华 | 一种外螺纹加工装置 |
CN107414212B (zh) * | 2017-09-21 | 2019-05-28 | 姚前华 | 一种外螺纹加工装置 |
Also Published As
Publication number | Publication date |
---|---|
DE10294826D2 (de) | 2004-09-09 |
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