Thread plate die for producing screw convenient to tap and capable of preventing back-off
By designing multiple anti-retraction grooves and guide threads with larger inclination angles in the molding part of the tooth plate mold, the problem that existing screws are difficult to enter the hard workpiece and are easy to fall back during tapping, and the tapping is facilitated And anti-return screw production.
Patent Information
- Application Number
- CN202421147749.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-23
- Publication Date
- 2025-02-14
- Estimated Expiration
- 2034-05-23
AI Technical Summary
The single-turn thread of existing screws is difficult to fit into the hard workpiece during tapping, and it is prone to screw retraction.
A tooth plate mold is designed, and the forming part includes a first forming groove area and a second forming groove area. The first forming groove area is provided with a plurality of anti-retraction grooves to form anti-return convex portions of the screw; the second forming groove area forms a guide thread with a larger inclination angle, which helps the screws to penetrate the workpiece more easily.
The tooth plate mold can form anti-retraction convex parts on the outside of the screw, reducing the phenomenon of screw retraction. At the same time, the screw entry during tapping is improved by designing the guide thread, and is suitable for workpieces with high hardness.
Smart Images
Figure CN222470586U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of thread plate moulds, in particular to a thread plate mould for producing screws which are convenient for tapping and can prevent back-off. Background Art
[0002] Screws are an indispensable part in industrial production. They are used to fix and connect two workpieces. Screw holes need to be opened in advance before the workpieces are connected. The opening of the screw holes is generally achieved by tapping the screws. The threads on the existing screws are single-turn threads, and no other structures are provided on the screws to ensure smooth tapping. When producing screws, a tooth plate mold is required. The screw blank is placed between two tooth plate molds, and the screw can be cold-molded by extrusion.
[0003] However, this kind of ordinary thread has many problems when tapping. When the hardness of the workpiece to be tapped is large, the screw is not easy to tap in, and during normal use, the screw may retreat. Therefore, it is necessary to design a tooth plate mold to produce screws that are easy to tap and not easy to retreat. Utility Model Content
[0004] In view of this, the utility model provides a thread plate die for producing screws that are easy to tap and prevent backoff, so as to solve the above problems.
[0005] A thread plate mold for producing screws that are easy to tap and prevent backoff, comprising two thread plates arranged at intervals, and a forming portion respectively arranged on each of the thread plates, the forming portion comprising a first forming groove area, a second forming groove area, a shear surface, and a chip groove arranged in sequence along the width direction of the thread plates, the first forming groove area comprising a plurality of first forming grooves opened at an angle, and a plurality of anti-backoff grooves arranged along the length direction of the thread plates, the second forming groove area comprising a plurality of second forming grooves opened at an angle, the acute angle between the inclination direction of the second forming groove and the extension direction of the thread plates being greater than the acute angle between the inclination direction of the first forming groove and the extension direction of the thread plates.
[0006] Furthermore, a feeding area and a discharging area are respectively arranged at two ends of the first forming groove area.
[0007] Furthermore, the tooth plate includes a stationary tooth plate and a movable tooth plate.
[0008] Furthermore, the length of the stationary tooth plate is shorter than the length of the movable tooth plate.
[0009] Furthermore, the first forming groove area also includes a plurality of first forming groove chip grooves extending along the width direction of the tooth plate.
[0010] Furthermore, adjacent first forming grooves and chip removal grooves are arranged at equal intervals.
[0011] Furthermore, the first forming groove chip removal groove is distributed on a side of the tooth plate close to the feed area.
[0012] Compared with the prior art, the tooth plate mold provided by the utility model for producing screws that are easy to tap and prevent backoff is provided with a first molding groove area and a second molding groove area on the molding part, and the first molding groove area is provided with multiple anti-backoff grooves, so that an anti-backoff convex portion can be formed on the outside of the screw, and the second molding groove area can form a guide thread at the tapping end of the screw, and the inclination of the guide thread is greater than the inclination of the tapping thread formed by the first molding groove area, so as to facilitate tapping into the workpiece. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 The utility model is a schematic structural diagram of a thread plate die for producing screws that are easy to tap and prevent back-off.
[0014] Figure 2 for Figure 1 Front view of the thread plate die for producing screws that are easy to tap and prevent backoff.
[0015] Figure 3 for Figure 1 Schematic diagram of the structure of the screws produced by the threaded plate mold that is used to produce screws that are easy to tap and prevent backoff. DETAILED DESCRIPTION
[0016] The following is a further detailed description of the specific embodiments of the present invention. It should be understood that the description of the embodiments of the present invention herein is not intended to limit the protection scope of the present invention.
[0017] like Figures 1 to 3 As shown, it is a schematic diagram of the structure provided by the utility model. The die plate mold for producing screws that are easy to tap and prevent backoff includes two die plates 10 arranged at intervals, and a molding part 20 respectively arranged on one side of the die plates 10. The die plate mold for producing screws that are easy to tap and prevent backoff also includes some other functional modules, such as a driving mechanism for driving a die plate to move linearly, and an installation mechanism for connecting and positioning the die plate and the driving mechanism, etc., which should be technologies well known to those skilled in the art and will not be described in detail one by one here.
[0018] The tooth plate 10 includes a stationary tooth plate 11 and a movable tooth plate 12 spaced apart from the stationary tooth plate 11. The stationary tooth plate 11 and the movable tooth plate 12 are rectangular plates respectively. The width of the stationary tooth plate 11 is the same as that of the movable tooth plate 12, and the length of the stationary tooth plate 11 is greater than the length of the movable tooth plate 12, so that the screw can be fully squeezed. When in use, the movable tooth plate 12 and the stationary tooth plate 11 clamp the screw, and the stationary tooth plate 11 remains stationary. The horizontal driving mechanism is connected to the movable tooth plate 12 and drives the movable tooth plate 12 to move relative to the stationary tooth plate 11. When the stationary tooth plate 11 and the movable tooth plate 12 overlap, the screw is forced to be stuck between the stationary tooth plate 11 and the movable tooth plate 12 to complete the thread rolling.
[0019] The molding portions 20 are respectively disposed on the side walls of the stationary tooth plate 11 and the movable tooth plate 12 that are opposite to each other.
[0020] The forming part 20 includes a first forming groove area 21, a second forming groove area 22, a shearing surface 23, and a chip removal groove 24 arranged on one side of the shearing surface 23. The forming part 20 also includes a feeding end 25 and a discharging end 26 arranged at both ends of the tooth plate 10.
[0021] The first forming groove area 21 includes a plurality of first forming grooves 211 opened obliquely, a plurality of anti-backward grooves 212 arranged at intervals, and a plurality of first forming groove chip removal grooves 213 extending along the width direction of the tooth plate 10 .
[0022] The first forming groove 211 is used to form threads on the screw. The groove depth of the first forming groove 211 becomes deeper and wider from the feed end 25 to the discharge end 26.
[0023] The anti-backward grooves 212 are arranged along the length direction of the tooth plate 10. The spacing between adjacent anti-backward grooves 212 is the same. The anti-backward grooves 212 are used to form a plurality of anti-backward convex portions distributed in an annular manner on the surface of the screw, thereby preventing the screw from backing out after the screw is inserted.
[0024] Each of the first forming groove chip removal grooves 213 is arranged at intervals and the spacing is equal. Each of the first forming groove chip removal grooves 213 is respectively connected to the adjacent first forming grooves 211, and one end of each of the first forming groove chip removal grooves 213 is connected to one end of the tooth plate 10. The first forming groove chip removal groove 213 is used to increase the friction between the screw and the stationary tooth plate 11 and the movable tooth plate 12 during thread rolling, and can guide the debris generated when the screw is deformed out of the first forming groove area 21.
[0025] The distribution area of the first forming groove chip removal groove 213 occupies half of the distribution area of the first forming groove area 21. The first forming groove chip removal groove 213 is close to the feed end 25 to provide a chip removal channel when the screw is just processed.
[0026] The second forming groove area 22 includes a plurality of second forming grooves 221 that are obliquely opened. The acute angle between the second forming grooves 221 and the length direction of the tooth plate 10 is greater than the acute angle between the first forming grooves 211 and the length direction of the tooth plate 10.
[0027] The shearing surface 23 is distributed along the length direction, and the shearing surface 23 is used to cut and remove excess material during the screw processing.
[0028] When in use, the first forming groove 211 forms a tapping thread 31 on the screw, and the second forming groove 221 is used to form a guide thread 32 with a larger inclination angle at the end of the tapping thread. The anti-backward groove 212 forms a plurality of anti-backward protrusions 33 symmetrically distributed along the center of the screw axis at the tapping thread 31 to prevent the screw from backing out during tapping.
[0029] Compared with the prior art, the thread plate mold for producing screws that are easy to tap and prevent backoff provided by the utility model is provided with a first molding groove area 21 and a second molding groove area 22 on the molding part 20, and the first molding groove area 21 is provided with multiple anti-backoff grooves 212, so that an anti-backoff convex portion can be formed on the outside of the screw, and the second molding groove area 22 can form a guide thread at the tapping end of the screw, and the inclination of the guide thread is greater than the inclination of the tapping thread formed by the first molding groove area 21, so as to facilitate tapping into the workpiece.
[0030] The above are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Any modification, equivalent substitution or improvement within the spirit of the present invention are included in the scope of the claims of the present invention.
Claims
1. A thread plate die for producing screws that are easy to tap and prevent back-off, characterized in that: The tooth plate mold for producing screws that are easy to tap and prevent backoff includes two tooth plates arranged at intervals, and a forming part respectively arranged on each of the tooth plates, the forming part including a first forming groove area, a second forming groove area, a shear surface, and a chip groove arranged in sequence along the width direction of the tooth plate, the first forming groove area includes a plurality of first forming grooves opened at an angle, and a plurality of anti-backoff grooves arranged along the length direction of the tooth plate, the second forming groove area includes a plurality of second forming grooves opened at an angle, and the acute angle between the inclination direction of the second forming groove and the extension direction of the tooth plate is larger than the acute angle between the inclination direction of the first forming groove and the extension direction of the tooth plate.
2. The thread plate die for producing screws that are easy to tap and prevent back-off according to claim 1, characterized in that: A feeding area and a discharging area are respectively arranged at two ends of the first forming groove area.
3. The thread plate die for producing screws that are easy to tap and prevent back-off according to claim 1, characterized in that: The tooth plate includes a stationary tooth plate and a movable tooth plate.
4. The thread plate die for producing screws that are easy to tap and prevent back-off as claimed in claim 3, characterized in that: The length of the stationary tooth plate is shorter than that of the movable tooth plate.
5. The thread plate die for producing screws that are easy to tap and prevent back-off as claimed in claim 2, characterized in that: The first forming groove area also includes a plurality of first forming groove chip grooves extending along the width direction of the tooth plate.
6. The thread plate die for producing screws that are easy to tap and prevent back-off according to claim 5, characterized in that: Adjacent first forming groove chip removal grooves are arranged at equal intervals.
7. The thread plate die for producing screws that are easy to tap and prevent back-off according to claim 5, characterized in that: The first forming groove chip removal groove is distributed on a side of the tooth plate close to the feeding area.