CN212019267U

CN212019267U - Thread forming device

Info

Publication number: CN212019267U
Application number: CN202020224803.6U
Authority: CN
Inventors: 吴敏; 赵烟彬
Original assignee: Penn Engineering Automotive Fasteners Kunshan Co ltd
Current assignee: Penn Engineering Automotive Fasteners Kunshan Co ltd
Priority date: 2020-02-28
Filing date: 2020-02-28
Publication date: 2020-11-27
Anticipated expiration: 2030-02-28

Abstract

The utility model discloses a forming device for screw thread, which is used for forming screw thread on a connecting piece, wherein the connecting piece comprises a flange part and a part to be processed; the thread rolling component comprises more than two thread rolling wheels and a fixing piece positioned at the end part of each thread rolling wheel, the thread rolling wheels are uniformly distributed along the circumferential direction, so that the side walls of the thread rolling wheels are matched to form a processing area, and a groove body is formed in the fixing piece; each rolling wheel is provided with an avoiding part and a processing part. The utility model discloses at least, include following advantage: the connecting piece can be stressed uniformly in a centering state by adopting the arrangement of the thread rolling component, and the formation of threads can be completed after accurate positioning by arranging the avoiding part on the thread rolling component, so that the structural design is optimized.

Description

Thread forming device

Technical Field

The utility model relates to a mechanical equipment technical field, it is a forming device for screw thread specifically.

Background

The statements in this section merely provide background information related to the present disclosure and may not constitute prior art.

The connecting piece is used as a commonly used auxiliary piece in mechanical equipment, has a very wide application range, and is particularly applied to automobiles. The detection of the automobile exhaust is usually carried out by an oxygen sensor, and the fixed position of the oxygen sensor needs a corresponding base shell as a base. Since the installation space is relatively limited here. And the required installation accuracy is higher, so need select the connecting piece that the size is little, and the precision is high when fixed to the base shell.

The connecting piece can be used for installing and fixing other components, and basically adopts a threaded fixing mode. But the difficulty is greater when the connecting piece with shorter size is threaded. Not only need consider the processing device and produce the problem of interfering to the connecting piece in the course of working, still need consider the precision and the stability of screw thread processing. In the prior art, the conventional axial machining mode or radial machining mode can cause the technical problems when the connecting piece with a short size is subjected to thread machining.

It should be noted that the above background description is only for the sake of clarity and complete description of the technical solutions of the present invention, and is set forth for facilitating understanding of those skilled in the art. These solutions are not considered to be known to the person skilled in the art merely because they have been set forth in the background section of the present invention.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defect among the prior art, the embodiment of the utility model provides a form device for screw thread, its setting that adopts the thread rolling subassembly can make the connecting piece atress even under the state of centering, through the setting of dodging the portion on the thread rolling subassembly, then can accomplish the formation to the screw thread after accurate location, structural design optimizes.

The embodiment of the application discloses: a forming device for threads is used for forming threads on a connecting piece, the connecting piece comprises a flange part and a part to be processed, and comprises a clamping component and a thread rolling component,

the clamping assembly is used for clamping the connecting piece and enabling the connecting piece to be arranged towards the thread rolling assembly; the clamping assembly comprises a first clamping piece and a second clamping piece, the first clamping piece and the second clamping piece are arranged oppositely, so that the first clamping piece can spit a connecting piece into the second clamping piece, the second clamping piece can move relative to the first clamping piece so as to be arranged opposite to the thread rolling assembly, and the first clamping piece and the second clamping piece synchronously rotate in the process of transferring the connecting piece, so that the clamping pieces are in a dynamic balance state;

the rolling element assembly comprises more than two rolling elements and a fixing piece positioned at the end part of each rolling element and used for supporting the rolling elements, the plurality of rolling elements are uniformly distributed along the circumferential direction, so that the side wall of each rolling element is matched to form a machining area, and the fixing piece is provided with a groove body used for containing a flange part of the connecting piece;

the side wall of each rolling wheel is provided with an avoiding part and a processing part which extend along the axial direction of the rolling wheel, and the length of the avoiding part of each rolling wheel is not less than that of the part to be processed of the connecting piece;

each rolling wheel is in clearance fit with the connecting piece when the avoiding part faces the connecting piece, and each rolling wheel is abutted against the connecting piece when the machining part faces the connecting piece.

Further, the plurality of roller cones rotate synchronously along with the connecting piece.

Further, the vertical distance between the guide part on the roller cone and the end part of the roller cone is smaller than the vertical distance between the end part of the roller cone and the flange part.

Further, still include trigger assembly, trigger assembly includes setting up the trigger bar on the thread rolling subassembly, is located the trigger cylinder on external equipment, the trigger cylinder can move towards the trigger bar after the thread rolling subassembly moves to the position, with the trigger bar butt.

Further, the second clamping piece can move towards the first clamping piece, so that a preset safety gap is formed between the end face of the first clamping piece and the end face of the second clamping piece.

Borrow by above technical scheme, the beneficial effects of the utility model are as follows:

1. in the application, the avoidance part is arranged, so that the part to be processed of the connecting piece is inserted into the hobbing component in the axis direction, and the part to be processed of the connecting piece can be completely overlapped with the avoidance part; the feeding precision of the thread rolling component can be ensured, and the structure is optimized;

2. this application is through the processing portion that sets up and trigger the subassembly the portion of treating of connecting piece moves the back that targets in place, adopts the mechanical trigger mode, makes processing portion rotate earlier certain angle with the portion's butt of treating of connecting piece is followed again the connecting piece rotates to under the condition that does not have the structure to interfere, accomplish the formation of screw thread with radial processing mode, design optimization.

In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural view of a station before a first clamping and a second clamping in the embodiment of the present invention;

fig. 2 is a schematic structural view of another station before the first clamping and the second clamping in the embodiment of the present invention;

fig. 3 is a schematic structural view illustrating the abutment of the second clamping member and the rolling device according to the embodiment of the present invention;

figure 4 is a schematic cross-sectional view of a thread rolling assembly before and after activation in an embodiment of the invention;

fig. 5 is a schematic view of one of the roller cones in an embodiment of the invention;

fig. 6 is a schematic view of a connector mechanism in an embodiment of the invention.

Reference numerals of the above figures: 1. a connecting member; 2. a thread rolling assembly; 3. a trigger lever; 4. triggering the air cylinder; 5. a first clamping member; 6. a second clamping member; 11. a flange portion; 12. a part to be processed; 21. a roller cone; 22. a machining area; 23. an avoidance part; 24. and a processing part.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

It should be noted that, in the description of the present invention, the terms "first", "second", and the like are used for descriptive purposes only and for distinguishing similar objects, and no order is shown between the two, and no indication or suggestion of relative importance is understood. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.

With reference to fig. 1 to 6, an embodiment of the present application discloses a forming device for a thread, which is used for forming a thread on a connecting member 1, where the connecting member 1 includes a flange portion 11, a portion to be processed 12, and an installation portion located on one side of the flange portion 11 and opposite to the portion to be processed 12.

The connector in the present embodiment is applied to a housing of an oxygen sensor for measuring exhaust gas of an automobile, which is required to have high accuracy and high strength due to a long-term high temperature environment in a work process and due to a limitation of an installation position. Current machining mode can destroy the streamline of metal, causes the intensity of product relatively poor, and this application is through the surperficial extrusion formation screw thread to the connecting piece, can guarantee like this that the intensity of product is higher.

The forming device of the application shown in the combined figure 1 and figure 2 comprises a clamping assembly used for a butt cold heading process and a thread rolling assembly 2 arranged corresponding to the clamping assembly. Wherein, the clamping assembly includes first holder 5 and second holder 6, first holder 5 with second holder 6 sets up relatively, as shown in fig. 1, is located the right and is first holder 5, is located the left and is second holder 6. First, the connector 1 is clamped by the first clamping member 5, and the connector 1 is transferred to the second clamping member 6 by spitting.

The material spitting mode specifically comprises the defects that due to the fact that the gravity of the part and the first clamping piece 5 is small, the phenomenon of micro downward movement can occur in the clamping process, so that in the butt joint process of the first clamping piece 5 and the second clamping piece 6, deviation phenomenon can occur, the butt joint of the connecting piece 1 is staggered, and the damage to the connecting piece 1 is caused. In order to solve the problem, in the material spitting process, the first clamping piece 5 and the second clamping piece 6 rotate synchronously, so that the connecting piece 1 is in a dynamic balance state in the transferring process, and the accuracy of the butt joint position of the first clamping piece 5 and the second clamping piece 6 is further ensured. And because the size of the connecting piece 1 is small, the first clamping piece 5 and the second clamping piece 6 can move relatively, so that the gap between the two clamping pieces meets the requirement of a safety gap in the transfer process, and preferably, the value of the safety gap is smaller than the thickness value of the flange part 11 of the connecting piece 1.

As shown in fig. 3, the second clamping member 6 can move relative to the thread rolling element 2, so that the connecting member 1 can be inserted into the thread rolling element 2 well.

Referring to fig. 3 to 6, in the present embodiment, the roller assembly 2 includes three roller cones 21, and fixing members at ends of the roller cones 21 for supporting the roller cones 21. The three rolling cones 21 extend along the left-right direction and are uniformly distributed in the vertical plane along the circumferential direction, so that the side walls of the rolling cones 21 are matched to form a machining area 22 for inserting the part to be machined 12 of the connecting piece 1.

Foretell the mounting, the mounting is discoid panel, and this panel with the position that processing region 22 corresponds has seted up and has link up the cell body, so that thread rolling subassembly 2 is in the orientation the in-process that connecting piece 1 removed, connecting piece 1 can wear to establish link up in the cell body to guarantee that the process step of follow-up screw thread formation effectively goes on, also can guarantee can not produce between the tip of thread rolling piece 21 and the flange portion 11 and interfere, and can guarantee safe processing distance between the two.

The roller bit 21 is provided with an avoiding part 23 and a processing part 24, and both the avoiding part 23 and the processing part 24 extend along the insertion direction of the connecting piece 1. The roller cone 21 is cylindrical, the relief portion 23 is formed by cutting off the side wall of the roller cone 21 along the axial direction of the roller cone 21, and the other portion of the side wall of the roller cone 21 forms the processing portion 24. In this embodiment, it is preferable that the length of the relief portion 23 in the insertion direction of the connector 1 is greater than the length of the portion to be processed 24 of the connector 1, so that all the portions to be processed 12 of the connector 1 can be arranged to overlap the relief portion 23, thereby ensuring that a thread can be effectively formed on the portions to be processed 12 of the connector 1.

In the present embodiment, during the insertion of the coupling 1 into the machining region 22, firstly, the feeding accuracy of the thread rolling assembly 2 in the insertion direction of the coupling 1 can be precisely controlled, and compared with the axial thread machining in the prior art, the feeding action of the thread rolling assembly 2 in the present application is substantially free from inertia, because the phenomenon that the thread rolling assembly 2 hits the flange portion 11 of the coupling 1 or the like does not occur. Secondly, the avoiding portion 23 is always arranged towards the portion 12 to be processed of the connecting piece 1, and in the process, the portion 12 to be processed of the connecting piece 1 is in clearance fit with the processing area 22, so that the portion 12 to be processed of the connecting piece 1 can be effectively and completely inserted into the processing area 22.

In this application, a vertical distance between the guide portion of the roller cone 21 and the end of the roller cone 21 is smaller than a vertical distance between the end of the roller cone 21 and the flange portion 11. The above arrangement can facilitate efficient formation of the thread on the connection 1.

In this application, can be provided with the hole on this connecting piece 1, adopt foretell processing method can not cause the deformation on connecting piece surface. Compared with the thread twisting process in the prior art, if the connecting piece 1 is provided with the through hole, the deformation of the connecting piece can be caused by stress factors in the thread twisting process, and the structural superiority of the application is further embodied.

The application also comprises a trigger assembly, wherein the trigger assembly comprises a trigger rod 3 arranged on the thread rolling component 2 and a trigger cylinder 4 positioned on external equipment. The arrangement mode enables the trigger rod 3 to move synchronously along with the thread rolling component 2. When the part 12 to be processed of the connecting piece 1 is inserted in place, the triggering cylinder 4 quickly abuts against the triggering rod 3, and a mechanical impact type triggering structure is adopted, so that the triggering effectiveness and rapidity of each time can be guaranteed. The trigger rod 3 can feed back a signal to a control assembly (not shown in the figure) after being abutted, the control assembly processes the signal and then acts on each roller cone 21, each roller cone 21 rotates slightly around the axis of the roller cone 21, so that the edge of the working part is abutted to the part to be machined 12 of the connecting piece 1, extrusion force is formed between the edge of the working part and the part to be machined 12 of the connecting piece 1, then the connecting piece 1 is driven to rotate around the axis of the connecting piece 1, and at the moment, each roller cone 21 rotates along with the connecting piece 1, and therefore threads on the machining part 24 can be formed on the part to be machined 12 of the connecting piece 1.

Referring to fig. 3, in the embodiment of the present application, a forming method for a thread is disclosed, which is used for forming a thread on a connecting member 1, wherein the connecting member 1 comprises a flange part 11 and a part to be processed 12. The connecting piece 1 is used for mounting and locking a base shell on an automobile exhaust structure in an application occasion, and the connecting piece 1 is required to be small in structure. The thickness of the flange part 11 of the connector 1 is approximately 4 mm, and the flange part 11 is used as a reference part for subsequent connection in a clamped process, so that the precision and the progress of a product can be effectively guaranteed. The length of the to-be-processed portion 12 of the connector 1 is approximately 8.3 mm, the outer diameter is approximately 9.1 mm, and the overall size is small. By adopting the radial processing technology in the prior art, the size of the part is too small, and the tail end of the thread to be processed is close to the flange part 11, so that the processing mechanism can interfere with the flange part 11 in the process of moving towards the connecting piece 1 in the radial direction; by adopting the axial processing technology in the prior art, the rotation speed of the processing mechanism is high, so that the phenomenon of further forward movement caused by inertia can be caused in the stopping process, and the tail end of the thread to be processed is close to the flange part 11, so that the end face of the processing mechanism is easy to impact the end face of the flange part 11, and the stopping of the whole process is caused.

The forming device can better solve the technical problems encountered by the radial machining process and the axial machining process, and the working principle is as follows:

the flange part 11 of the connecting piece 1 is clamped by the clamping mechanism, so that the part 12 to be processed of the connecting piece 1 is arranged towards the thread rolling device, and the part 12 to be processed of the connecting piece 1 extends towards the thread rolling device. Preferably, the height of the connecting element 1 in the vertical plane and the height of the machining region 22 of the hob device in the vertical plane are in the same horizontal plane.

The thread rolling device is driven to move towards the connecting piece 1, so that the part 12 to be processed of the connecting piece 1 is arranged in a processing area 22 of the thread rolling device in a penetrating mode. At this time, the relief portion 23 of the rolling cone 21 of the rolling device is disposed toward the portion to be processed 12 of the connecting member 1 so that the rolling device is clearance-fitted with the connecting member 1. Here, it is noted that the length of the relief portion 23 of the roller cone 21 in the insertion direction of the connection member 1 is greater than the length of the to-be-machined region 22 of the connection member 1, so that the to-be-machined region 22 of the connection member 1 is completely inserted into the to-be-machined region 22 of the roller device, and the subsequent thread machining step is effectively completed. In the process of inserting the connecting piece 1, too high speed is not needed in the pushing process, so that inertia can be avoided when the connecting piece 1 is pushed in place, and the accurate inserting position of the connecting piece 1 is effectively ensured.

In the above steps, a through groove is formed in the fixing member of the thread rolling assembly 2, and when the thread rolling assembly 2 moves relative to the connecting member 1, the connecting member 1 can penetrate through the through groove. In this embodiment, when the portion to be processed 12 of the connector 1 moves to the proper position, the flange portion 11 of the connector 1 is embedded in the through groove, so that the distance between the end surface of the roller cone 21 and the end surface of the flange portion 11 on the side facing the roller cone 21 is small, and the distance is approximately 1.3 mm.

The thread rolling device and the connecting piece 1 are driven to rotate relatively, the thread rolling device is provided with three thread rolling wheels 21 which are uniformly distributed along the circumferential direction, and the opposite side walls of the three thread rolling wheels 21 form a processing area 22 of the thread rolling device. The relative rotation is specifically as follows, the three roller cones 21 are driven to rotate slightly by the trigger assembly, so that the edge of the machining part 24 of each roller cone 21 is abutted against the side wall of the connecting piece 1, at the moment, the connecting piece 1 is driven to rotate around the axis of the connecting piece 1, the three roller cones 21 rotate synchronously along with the connecting piece 1, the machining part 24 of the roller cone 21 is made to contact with the surface to be machined of the connecting piece 1, and therefore the required threads are formed on the surface to be machined of the connecting piece 1.

In the above steps, it is preferable that the roller cone 21 of the roller element assembly 2 rotates once for one thread forming process.

The present invention has been explained by using specific embodiments, and the explanation of the above embodiments is only used to help understand the method and the core idea of the present invention; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the specific implementation and application scope, to sum up, the content of the present specification should not be understood as the limitation of the present invention.

Claims

1. A forming device for screw threads is used for forming screw threads on a connecting piece, the connecting piece comprises a flange part and a part to be processed, and is characterized by comprising a clamping component and a thread rolling component,

2. The thread forming apparatus of claim 1, wherein a plurality of the roller cones each rotate synchronously with the connection piece.

3. The thread forming apparatus of claim 1, wherein a perpendicular distance between the pilot portion on the roller cone and the end of the roller cone is less than a perpendicular distance between the end of the roller cone and the flange portion.

4. The thread forming apparatus of claim 1, further comprising a trigger assembly including a trigger rod disposed on the thread rolling assembly, a trigger cylinder located on an external device, the trigger cylinder being movable toward the trigger rod to abut the trigger rod upon movement of the thread rolling assembly into position.

5. The forming apparatus for screw thread according to claim 1, wherein the second clamping member is movable toward the first clamping member so that the end face of the first clamping member forms a preset safety clearance with the end face of the second clamping member.