CN214023276U

CN214023276U - Thread rolling die

Info

Publication number: CN214023276U
Application number: CN202022946284.7U
Authority: CN
Inventors: 饶陈伟; 陈国龙; 彭威; 孙浩
Original assignee: SUZHOU SHINING HIGH STRENGTH FASTENER CO Ltd
Current assignee: SUZHOU SHINING HIGH STRENGTH FASTENER CO Ltd
Priority date: 2020-12-11
Filing date: 2020-12-11
Publication date: 2021-08-24
Anticipated expiration: 2030-12-11

Abstract

The utility model belongs to the technical field of the mould, relate to a chamfer and screw thread are fashioned thread rolling mould together particularly, include: the upper and lower thread rolling plates are arranged in a shape of being inclined from left to right; the thread rolling plate is provided with a thread rolling part and a chamfer processing part, and the chamfer and the thread can be formed together; the length of the upper screw plate is larger than that of the lower screw plate, so that a bolt workpiece can smoothly roll out along with the upper screw plate. Use the utility model provides a mould processing bolt has not only simplified production processes, has improved production efficiency, and the bolt precision of coproduction is high, and stability is strong, has improved the product yield, has reduced manufacturing cost.

Description

Thread rolling die

Technical Field

The utility model belongs to the technical field of the mould, a thread rolling mould is related to particularly.

Background

The thread rolling die is a most commonly used thread processing tool in the standard fastener industry for processing screws and bolts, the working principle of thread rolling is that two identical thread rolling surfaces have the same tooth shapes and the same spiral angles with the thread shapes of the bolts, and the bolt blanks between the two thread rolling dies are rolled into threads when the thread rolling dies move mutually. The thread rolling plate is reciprocated once, the processing of one bolt thread is finished, the speed is quite high, and the processed thread has the advantages of high precision and strength, good surface quality and the like, so the thread rolling plate is widely applied to the processing of small bolts.

In the prior art, the thread rolling die is only used for processing threads. Most of the chamfers of the screws need turning after thread rolling, so that the production efficiency is low, and the thread rolling machine and the lathe need to be used alternately, so that the production cost is increased.

Therefore, it is necessary to design a special thread rolling die which can form the chamfer and the thread together.

Disclosure of Invention

The utility model aims at overcoming the defects of the prior art and providing a special thread rolling die which can form a chamfer and a thread together.

In order to achieve the above purpose, the utility model adopts the technical scheme that: providing a thread rolling die, comprising: the upper and lower thread rolling plates are obliquely arranged at the left lower part and the right higher part; the upper screw plate is a movable plate, and the lower screw plate is a static plate; the length of the upper screw plate is larger than that of the lower screw plate, so that the bolt can smoothly roll out along with the upper screw plate.

The lower screw plate comprises a thread rolling part and a chamfer processing part; the thread rolling part and the chamfering part are integrally formed and processed; or a split structure can be adopted, and the two parts are stably and detachably connected.

The upper screw plate is provided with a thread rolling part and a chamfer processing part which are completely consistent with those of the lower screw plate.

The upper screw plate can be further provided with: and the position of the thread rolling part completely consistent with the lower thread rolling plate, which corresponds to the chamfer processing part of the lower thread rolling plate, is a smooth plane.

Because of the application of the technical scheme, compared with the prior art, the utility model has the following advantages: the movable screw plate is longer than the static screw plate, so that screws can smoothly roll out along with the movable screw plate; the chamfering processing part completes chamfering processing together when the thread rolling part processes threads; the production process is simplified, the production efficiency is improved, the produced bolt is high in precision and strong in stability, the product yield is improved, and the production cost is reduced.

Drawings

Fig. 1 is a three-view diagram of a thread rolling die of the present invention.

Fig. 2 is a left side view of the thread rolling die of the present invention in three views.

Fig. 3 is a simplified schematic diagram of a thread rolling die.

Figure 4 is a three-view drawing of the upper die of example 2.

In the drawing, 1 is an upper screw plate, 2 is a lower screw plate, 3 is a bolt workpiece, 21 is a thread rolling part, 22 is a chamfer processing part, 221 is an inclined rolling surface of the chamfer processing part, and 222 is a transition plane of the chamfer processing part; reference numeral 11 denotes the upper screw thread part of example 2, and 12 denotes the upper screw smooth part of example 2.

Detailed Description

The present invention will be further described in detail with reference to specific embodiments, which are implemented on the premise of the technical solution of the present invention, and detailed embodiments and specific operation procedures are provided, but the present invention is not limited to the following embodiments.

Example 1

Referring to fig. 1 to 3, a thread rolling die includes: an upper screw plate 1 and a lower screw plate 2; the upper screw plate 1 is a movable plate, the lower screw plate 2 is a static plate, and the movable plate and the static plate are all obliquely arranged with the left lower and the right higher; the length of the movable plate is larger than that of the static plate, so that the bolt workpiece 3 can smoothly roll out along with the movable plate.

The lower screw plate 2 specifically includes: a thread rolling part 21 having a rolling surface and a chamfer processing part 22 provided at one side of the thread rolling die. With further reference to fig. 2, the chamfer machining section 22 in turn includes: an inclined kneading surface 221 connected to the thread rolling surface, and a transition plane 222 connected to the inclined kneading surface 221. The inclined rubbing surface 221 is used for processing bolt chamfers, and the inclination angle is matched with the chamfer angle of the bolt to be processed; the transition plane 222 is arranged parallel to the thread rolling plane. The chamfer processing part 22 is in an inclined shape with a lower left and a higher right, and the inclination angle is larger than that of the screw plate.

The upper screw plate 1 is provided with a thread rolling part and a chamfer processing part which are completely consistent with the lower screw plate 2. The thread rolling part and the chamfering part of the upper and the lower thread rolling plates are integrally formed and processed. It can be understood that the two parts can also adopt a split structure to carry out stable detachable connection.

When the device is used, a bolt workpiece to be processed is placed between the upper thread rolling die and the lower thread rolling die, and the head of the bolt (i.e. the position which does not need to be processed) is positioned outside the die, so that the head of the bolt cannot be damaged. The upper screw plate 1 moves forwards, and threads with the same tooth form and the same spiral angle are formed on the bolt through the thread rolling part 21; while the end of the bolt is rolled through the chamfer machining part 22, the chamfer is formed together with the thread.

Example 2

Embodiment 2 provides a special thread rolling die, including: an upper screw plate 1 and a lower screw plate 2; the lower screw plate 2 further specifically includes: a thread rolling part 21 having a rolling surface and a chamfer processing part 22 provided at one side of the thread rolling die.

Referring to fig. 4, the upper screw plate 1 according to the present embodiment is provided with a thread rolling part 11 completely identical to the lower screw plate; however, a position corresponding to the chamfer processing portion of the lower screw plate is set as the smooth flat surface 12.

Compared with embodiment 1, the present embodiment is different in design in that: the upper screw plate 1 is not provided with a chamfer processing portion. The same procedure was used as in example 1. Compared with the embodiment 1, the upper screw plate is simpler to manufacture and is beneficial to reducing the cost.

The position or position relation of the indications such as "upper, lower, left, right, inside and outside" mentioned in the utility model is the position or position relation based on the figure shows, or the position or position relation that the product of the utility model was put usually when using, or the position or position relation that the ordinary understanding of skilled person in the art was, is only for the convenience of description the utility model discloses and the simplified description.

The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the embodiments is to enable people skilled in the art to understand the contents of the present invention and to implement the present invention, which cannot limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.

Claims

1. A thread rolling die, comprising:

an upper screw plate and a lower screw plate;

the lower screw plate is a static plate and comprises a thread rolling part and a chamfer processing part arranged on one side of the screw plate;

the upper screw plate is a movable plate, the length of the upper screw plate is greater than that of the lower screw plate, and a thread rolling part with the same tooth shape and the same spiral angle as the lower screw plate is arranged;

the chamfer processing part includes: an inclined kneading surface connected with the thread rolling part, and a transition plane connected with the inclined kneading surface.

2. A die according to claim 1 wherein said upper and lower plates are arranged in an inclined configuration with one end lower than the other.

3. The thread rolling die according to claim 1, wherein the chamfer processing part is provided with an inclined structure with one end lower than the other end, the inclination direction is consistent with that of the thread rolling plate, and the inclination angle is larger than that of the thread rolling plate.

4. A die according to claim 1, wherein the upper die is provided with chamfered processing portions having shapes and positions completely identical to those of the lower die.

5. The thread rolling die according to claim 1, wherein the upper thread rolling die is provided with a smooth flat surface at a position corresponding to the chamfer-processed portion of the lower thread rolling die.

6. A thread rolling die according to any one of claims 1 to 5, wherein the thread rolling part and the chamfering part are integrally formed.

7. A thread rolling die according to any one of claims 1 to 5, wherein the thread rolling part and the chamfering part are of a split structure, and the two parts are stably and detachably connected.