Circular shaft square tenon punching device

Abstract

The utility model provides a round shaft square tenon punching device. The round shaft square tenon punching device comprises a base; the base is fixedly connected with a fixed die holder, a first female die is installed on the fixed die holder, a first blade assembly is arranged on the first female die, and a circular groove is formed in the first female die; the sliding die base is connected to the base in a sliding mode, and a second female die is installed on the sliding die base. The upper die base is provided with a die handle and a first wedge, the upper die base is installed on a punch press sliding block through the die handle, and the end, away from the upper die base, of the first wedge abuts against the sliding die base. And in the downward moving process of the upper die base, the sliding die base is pushed to move towards the fixed die base, and opposite punching machining is conducted on a target circular shaft. The utility model relates to a stamping die, in particular to a stamping die, and aims to solve the problems that in the background technology, common stamping is adopted in the traditional production process, a stamping surface has inclination due to the influence of a stamping gap, a rough tearing surface exists, and burrs exist on an upper opening.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of round shaft square tenon production and processing device, more particularly to a round shaft square tenon punching device. BACKGROUND

[0002] In precision electromechanical products, shaft parts are indispensable, which play the role of rotating shaft and transmitting torque. Many round shafts are processed into drum-shaped square tenons at the force transmission part, as shown in the figure. Figure 1

[0003] In many cases, due to the functional requirements of products, such as the matching accuracy of shafts and connecting parts, high standards are required for the size accuracy, shape and position tolerance, and smoothness of square tenons.

[0004] The processing method of round shaft square tenon generally adopts cutting processing on a milling machine. During processing, it needs to be firmly clamped, centered, fed, and unloaded, so the efficiency is low. Some use ordinary punching, but due to the influence of punching clearance, the punching surface has an inclination, and there is a rough tearing surface and burrs on the upper opening. SUMMARY

[0005] The purpose of the embodiment of the application is to provide a round shaft square tenon punching device to solve the problem of inclination of the punching surface, rough tearing surface, and burrs on the upper opening due to the influence of punching clearance when using ordinary punching in the traditional production process.

[0006] To achieve the above-mentioned purpose, the technical scheme adopted by the application is: a round shaft square tenon punching device, comprising:

[0007] A base is fixedly connected with a fixed die holder, a first recess die is installed on the fixed die holder, a first blade assembly is arranged on the first recess die, and a circular groove is arranged on the first recess die;

[0008] A sliding die holder is slidingly connected to the base, and a second recess die is installed on the sliding die holder;

[0009] An upper die holder is provided with a die handle and a first inclined wedge, the upper die holder is installed on the punch slide through the die handle, the first inclined wedge is tightly connected to one end of the upper die holder and abuts against the sliding die holder, and the sliding die holder is pushed to move towards the fixed die holder during the downward movement of the upper die holder and performs opposite punching processing on the target round shaft.

[0010] As a preferred, a second blade assembly is arranged on the second recess die, and the first blade assembly and the second blade assembly are located on the same horizontal plane.

[0011] As a preferred, it further comprises an ejection mechanism for finishing and edging the target round shaft after opposite punching.​

[0012] Preferably, the ejection mechanism comprises:

[0013] a second oblique wedge fixedly connected to the upper die base;

[0014] an ejector, passing through the sliding die base and being slidably connected to the sliding die base;

[0015] During the downward movement of the upper die base, the second inclined wedge abuts against the ejector, driving the ejector to move toward the fixed die base and push the target circular shaft that has been punched into the circular groove. During this process, the remaining cutting marks after the first blade assembly and the second blade assembly are punched are also trimmed and squeezed out by the first blade assembly on the first die.

[0016] Preferably, the ejector is provided with a side groove, and the side groove is provided with a first abutting portion;

[0017] The left and right sides of the working end of the second wedge are respectively provided with two parallel wedge surfaces, and the left and right wedge surfaces are adapted to the side grooves;

[0018] During the downward movement of the second inclined wedge, the right inclined wedge surface abuts against the first abutting portion and pushes the ejector to move rightward.

[0019] Preferably, a second abutment portion is further provided on the side groove;

[0020] During the upward movement of the second inclined wedge, the left inclined wedge surface abuts against the second abutting portion and moves the ejector toward a side away from the fixed mold base.

[0021] Preferably, there are two side grooves, and the two side grooves are symmetrically arranged about the axis of the ejector;

[0022] The working end of the second oblique wedge is divided into two parts, front and rear parts, which are symmetrically arranged with respect to the center line of the second oblique wedge.

[0023] Preferably, a reset spring is provided between the fixed die base and the sliding die base; the reset spring ensures that the sliding die base is reset after the first inclined wedge is out of contact with the sliding die base.

[0024] Preferably, a limiting screw is also provided on the base, and the limiting screw is used to maintain a necessary distance between the sliding mold base and the obtained fixed mold base under the action of the reset spring to ensure that the target circular shaft can be accurately inserted between the first die and the second die, ensuring its high-precision radial positioning.

[0025] The beneficial effects of the circular shaft square tenon punching device provided by the present application are:

[0026] 1. Avoid the defects of ordinary punching (non-pure shear, tear and burr), without punch, directly with concave die blade, no tear and slope, up and down cutting surface is basically parallel and smooth.

[0027] 2. The sliding die seat and the fixed die seat are combined on the same base part base, which is convenient for ensuring the symmetry and flush of the two groups of blades on the first concave die and the second concave die.

[0028] 3. The first inclined wedge and the second inclined wedge work in time, generate transverse force in turn, and complete punching and finishing, and push the workpiece.

[0029] 4. The operation of the whole device is not limited by the precision of the punch press, as long as the pressure can be provided through the punch press slider.

[0030] 5. The right end of the ejector looks like the punch of the ordinary punching die, but the manufacturing requirements are much simpler than the conventional punch, only the sliding gap with the second concave die needs to be kept (irrelevant to the conventional punching gap), which can push and finish the workpiece. The inclined wedge slider formed by the side groove of the ejector and the second inclined wedge is slightly different from the conventional structure, and the wedge surfaces of the interaction are arranged at the two side grooves of the ejector, instead of being arranged in the middle of the left end of the ejector. This is mainly an adaptive change for the small diameter of the target round shaft, which aims to increase the strength of the two and facilitate the machining of the abutting portion matched with the second inclined wedge. BRIEF DESCRIPTION OF DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0032] Figure 1 The target round shaft three-dimensional structure schematic diagram provided by the embodiments of the present application;

[0033] Figure 2 The structure schematic diagram of the target piece installed in the round shaft square tenon punching device provided by the embodiments of the present application;

[0034] Figure 3 The base assembly top view structure schematic diagram of the round shaft square tenon punching device provided by the embodiments of the present application;

[0035] Figure 4 The second inclined wedge of the round shaft square tenon punching device provided by the embodiments of the present application is a three-dimensional structure schematic diagram;

[0036] Figure 5A schematic diagram of the three-dimensional structure of the ejector of the round shaft square tenon punching device provided in an embodiment of the present application.

[0037] Among them, the reference numerals in the figures are:

[0038] 1. Base; 2. Fixed die base; 3. First die; 4. Circular groove; 5. Target circular axis; 6. Sliding die base; 7. Second die; 8. Limit screw; 9. Ejector; 10. First wedge; 11. Second wedge; 12. Upper die base; 13. Die handle; 14. Return spring; 15. Right wedge surface; 16. Second abutment; 17. Side groove; 18. First abutment; 19. Left wedge surface. DETAILED DESCRIPTION

[0039] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application more clearly understood, this application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0040] It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.

[0041] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0042] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0043] Please also refer to Figures 1 to 5 , the round shaft square tenon punching device provided in the embodiment of the present application is now described.

[0044] The round shaft square tenon punching device includes: a base 1, which is fixedly connected to a fixed die base 2, a first die 3 is installed on the fixed die base 2, a first blade assembly is provided on the first die 3, a circular groove 4 is provided on the first die 3, and the diameter of the circular groove 4 is larger than the diameter of the target round shaft 5; a T-shaped slide groove is provided on the base 1, and a T-shaped boss is provided at the bottom of the sliding die base 6, and the sliding die base 6 is slidably connected to the T-shaped slide groove through the T-shaped boss. The sliding die base 6 is equipped with a second die 7, and the second die 7 is provided with a second blade assembly. The first blade assembly and the second blade assembly are located on the same horizontal plane and are arranged opposite to each other. The first blade assembly consists of two blades, and the two blades are fixed up and down on the first recess of the first die 3; the second blade assembly also consists of two blades, and the two blades are fixed up and down on the second recess of the second die 7, and the circular groove 4 is connected to the second recess; an upper die base 12 is provided with a die handle 13 and a first inclined wedge 10, and the upper die base 12 is installed on the punch slide through the die handle 13. The two first inclined wedges 10 are fastened to the front and rear ends of the left side of the upper die base 12 and abut against the sliding die base 6. During the downward movement of the upper die base 12, the first inclined wedge 10 pushes the sliding die base 6 to move toward the fixed die base 2 and performs opposite punching processing on the target circular shaft 5 until the first recess of the first die 3 is fitted with the second recess of the second die 7.

[0045] A return spring 14 is provided between the fixed die base 2 and the sliding die base 6; the return spring 14 ensures that the sliding die base 6 returns to its original position after the first wedge 10 is released from contact with the sliding die base 6. A limit screw 8 is also provided on the base 1. Under the action of the return spring 14, the limit screw 8 is used to maintain the required distance between the sliding die base 6 and the fixed die base 2, thereby ensuring the required spacing between the first blade assembly and the second blade assembly, i.e., the chord length of the square tenon cross section, to ensure that the target circular shaft 5 can be accurately inserted between the first blade assembly of the first die 3 and the second blade assembly of the second die 7, ensuring high-precision radial positioning.

[0046] As a preferred embodiment, in order to trim and polish the target circular shaft 5 after the punching is completed and to push it into the circular groove 4, the circular shaft square tenon punching device also includes an ejection mechanism. Specifically, the ejection mechanism includes: a second inclined wedge 11, which is fixedly connected to the upper die base 12; through holes are formed in the sliding die base 6 and the second die 7, and an ejector 9 passes through the through holes and is slidably connected to the sliding die base 6 and the second die 7; during the downward movement of the upper die base 12, after the first die 3 and the second die 7 complete the punching action, the second inclined wedge 11 abuts the ejector 9, driving the ejector 9 to move toward the fixed die base 2 and push the punched target circular shaft 5 into the circular groove 4. During this process, the remaining cutting marks after the punching of the first and second blade assemblies are trimmed and polished by the first blade assembly on the first die 3. Waste material is squeezed out of the die cutting edge and blown away by compressed air. The ejector 9 is provided with a side groove 17, which is provided with a first abutment 18. The second wedge 11 has parallel right and left wedge surfaces 15 and 19 on its working end, which mate with the side groove 17. During the downward movement of the second wedge 11, the right wedge surface 15 abuts the first abutment 18, pushing the ejector 9 to move. The side groove 17 is also provided with a second abutment 16. During the upward movement of the second wedge 11, the left wedge surface 19 abuts the second abutment 16, moving the ejector 9 away from the fixed mold base 2.

[0047] As a preferred embodiment, two side grooves 17 are provided, and the two side grooves 17 are symmetrically arranged about the axis of the ejector 9; the working end of the second inclined wedge 11 is divided into front and rear ends and is symmetrically arranged, so that the force on the ejector 9 is more balanced.

[0048] Principle: Under normal circumstances, the sliding die base 6 and the fixed die base 2 are pushed open by the reset spring 14, and the necessary distance is maintained by the limit screw 8, so that the blade spacing between the first die 3 and the second die 7, that is, the chord length of the square tenon section, when working, the target circular shaft 5 is accurately inserted between the four blades of the first die 3 and the second die 7, which can easily play a role in precise positioning.

[0049] After the target round shaft 5 is put in, the upper die holder 12 goes down with the punch slider, the inclined surface on the first inclined wedge 10 presses the corresponding inclined surface on the sliding die holder 6, so that the sliding die holder 6 moves towards the fixed die holder 2, and gradually presses the side of the target round shaft 5 close to the first die 3 into the cutting edge of the first die 3, at the same time, the other side of the target round shaft 5 is also pressed into the cutting edge of the second die 7. The upper die holder 12 continues to go down with the punch slider, and completes the opposite cutting of the target round shaft 5, and the cutting edge of the first die 3 and the cutting edge end surface of the second die 7 tend to be in close contact, at this time, the abutting surface of the first inclined wedge 10 and the sliding die holder 6 is separated, and the sliding die holder 6 is stationary.

[0050] Then the punch slider continues to go down, the right side inclined surface 15 on the second inclined wedge 11 begins to abut against the first abutting part 18 on the upper side groove 17 of the ejector 9, so that the ejector 9 moves towards the fixed die holder 2, and gradually pushes the cut target round shaft 5 into the round groove 4 of the first die 3. During the pushing process, the residual joint mark after the first cutting edge assembly and the second cutting edge assembly are cut is also polished and extruded by the first cutting edge assembly in the first die 3.

[0051] Then the punch slider goes up, the left side inclined surface 15 on the second inclined wedge 11 abuts against the second abutting part 16 on the side groove 17, so that the ejector 9 is reset, and the first inclined wedge 10 is also separated from the sliding die holder 6 during the upward movement of the upper die holder 12, and the sliding die holder 6 is also reset under the action of the reset spring 14. The finished target round shaft 5 can also be easily taken out of the round groove 4 of the first die 3.

[0052] The above only describes the preferred embodiments of the present application, and is not used to limit the present application, any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. Round shaft square tenon punching device, characterized in that: include: The base is fixedly connected to a fixed die base, the fixed die base is mounted with a first die, the first die is provided with a first blade assembly, and the first die is provided with a circular groove; The sliding die base is slidably connected to the base, and the sliding die base is equipped with a second die; An upper die base is provided with a die handle and a first inclined wedge. The upper die base is installed on the punch slide through the die handle. Two first inclined wedges are fastened to the front and rear ends of the upper die base and abut against the sliding die base. During the downward movement of the upper die base, the sliding die base is pushed toward the fixed die base and the target circular shaft is punched in opposite directions through the first die and the second die.

2. The round shaft square tenon punching device according to claim 1, characterized in that: The second die is provided with a second blade assembly, and the first blade assembly and the second blade assembly are located on the same horizontal plane.

3. The round shaft square tenon punching device according to claim 2, characterized in that: The invention also comprises an ejection mechanism, which is used for trimming and polishing the target circular shaft after the punching is completed.

4. The round shaft square tenon punching device according to claim 3, characterized in that: The ejection mechanism comprises: a second oblique wedge fixedly connected to the upper die base; an ejector, passing through the sliding die base and being slidably connected to the sliding die base; During the downward movement of the upper die base, the second inclined wedge abuts against the ejector, driving the ejector to move toward the fixed die base and push the target circular shaft that has been punched into the circular groove. During this process, the remaining cutting marks after the first blade assembly and the second blade assembly are punched are also trimmed and squeezed out by the first blade assembly on the first die.

5. The round shaft square tenon punching device according to claim 4, characterized in that: The ejector is provided with a side groove, and the side groove is provided with a first abutment portion; The left and right sides of the working end of the second wedge are respectively provided with two parallel wedge surfaces, and the left and right wedge surfaces are adapted to the side grooves; During the downward movement of the second inclined wedge, the right inclined wedge surface abuts against the first abutting portion and pushes the ejector to move.

6. The round shaft square tenon punching device according to claim 5, characterized in that: A second abutment portion is further provided on the side groove; During the upward movement of the second inclined wedge, the left inclined wedge surface abuts against the second abutting portion and moves the ejector toward a side away from the fixed mold base.

7. The round shaft square tenon punching device according to claim 6, characterized in that: There are two side grooves, and the two side grooves are symmetrically arranged about the axis of the ejector; The working end of the second oblique wedge is divided into two parts, front and rear parts, which are symmetrically arranged with respect to the center line of the second oblique wedge.

8. The round shaft square tenon punching device according to any one of claims 1 to 7, characterized in that: A reset spring is provided between the fixed die base and the sliding die base; the reset spring ensures that the sliding die base is reset after the first inclined wedge is out of contact with the sliding die base.

9. The round shaft square tenon punching device according to claim 8, characterized in that: A limiting screw is also provided on the base, and the limiting screw is used to maintain the necessary distance between the sliding mold base and the obtained fixed mold base under the action of the reset spring to ensure that the target circular shaft can be accurately inserted between the first die and the second die, ensuring its high-precision radial positioning.

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