A punch assembly for a cold header

Abstract

The utility model provides a kind of stamping parts of cold header, including punch shell, movable punch, punch pin, first elastic member and second elastic member;The front end of punch shell is open and rear end is fixed with bearing, movable punch is located in punch shell and protrudes from the front end outside the opening, the front end of movable punch is equipped with profiled groove and rear end is equipped with hollow slot communicated with the inside of punch shell, punch pin is located in movable punch, and the front end of punch pin is connected with T block by being contacted in hollow slot after being passed through profiled groove and rear end, first elastic member is fixed between movable punch and bearing, second elastic member is fixed between T block and bearing.Set punch pin protrudes outside movable punch, blank held by contact clamp device is pushed into cavity of female die seat by punch pin, especially for shorter blank, to prevent the failure of shorter blank, while also guaranteeing the coaxiality precision of shorter blank when entering the cavity of female die seat, with the advantages of convenient and efficient.

Description

Technical Field

[0001] This utility model relates to the field of cold heading machine technology, and in particular to a stamping component of a cold heading machine. Background Technology

[0002] The stamping components of a cold heading machine are the core components that directly participate in the plastic deformation of metal blanks, transmit impact force, and control forming accuracy. Their core function is to convert the power of the cold heading machine into the plastic deformation force of the blank, and finally form the blank into fasteners (bolts, nuts, rivets) or irregular parts.

[0003] In existing cold heading machines, the punch is recessed in the movable punch. When the clamping device holds the blank and aligns it with the die opening of the die holder, the inner groove of the movable punch receives the blank, and then the punch guides the blank along the inner groove of the movable punch to push it into the die cavity of the die holder. This method does not allow the punch to contact the blank immediately and push it into the die cavity of the die holder. Instead, the movable punch receives the blank and then the punch pushes it out. When receiving shorter blanks, this method may cause the blank to fall out due to poor matching between the movable punch and the punch, and the blank is also prone to coaxiality deviation due to poor matching between the movable punch and the punch. Therefore, the stamping components of existing cold heading machines are not convenient and efficient to use and need to be improved. Utility Model Content

[0004] This utility model aims to provide a stamping component for a cold heading machine to solve the problems mentioned in the background art. In the existing cold heading machine stamping component, the punch is recessed in the movable punch. When the clamping device holds the blank and aligns it with the die opening of the female die holder, the inner groove of the movable punch receives the blank, and then the punch guides the blank along the inner groove of the movable punch to push it into the die cavity of the female die holder. This method does not allow the punch to contact the blank immediately to push it into the die cavity of the female die holder. Instead, the movable punch receives the blank and then the punch pushes it out. Therefore, when receiving shorter blanks, this method may cause the blank to fall out due to poor matching between the movable punch and the punch, and the blank is prone to coaxiality deviation due to poor matching between the movable punch and the punch. Therefore, the existing cold heading machine stamping component is not convenient and efficient to use.

[0005] The technical solution adopted by this utility model to solve the technical problem is as follows: A stamping component of a cold heading machine includes a punch shell, a movable punch, a punch pin, a first elastic element, and a second elastic element; the front end of the punch shell is open and the rear end is fixed with a support; the movable punch is located inside the punch shell and its front end protrudes outside the open end; the front end of the movable punch is provided with a shaped groove and the rear end is provided with a hollow groove communicating with the interior of the punch shell; the punch pin is located inside the movable punch, and the front end of the punch pin passes through the shaped groove and the rear end contacts the hollow groove to connect with a T-block; the first elastic element is fixed between the movable punch and the support; and the second elastic element is fixed between the T-block and the support.

[0006] In some embodiments, the punch shell is provided with a transversely convex guide groove communicating with the opening, the movable punch is transversely convex, the movable punch is located in the guide groove and its front end protrudes out of the opening.

[0007] In some embodiments, the movable punch is provided with a transfer groove, the front end of the transfer groove is connected to the shaped groove and the rear end is provided with a gradually widening groove connected to the hollow groove; the punch is located in the transfer groove, and the front end of the punch extends out of the shaped groove and the rear end is provided with a gradually widening portion to be located in the gradually widening groove.

[0008] In some embodiments, the diameter of the first elastic element is larger than the diameter of the second elastic element, and the second elastic element is housed within the first elastic element.

[0009] In some embodiments, both the first elastic element and the second elastic element are springs.

[0010] In some embodiments, the punch abuts against the T-block.

[0011] In some embodiments, the punch shell and the bearing are detachably connected.

[0012] In some embodiments, the punch shell and the bearing are fixed together by screws.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] In this invention, by setting a punch protruding outside the movable punch, the punch can quickly contact the blank held by the clamping device and push it into the mold cavity of the female mold base. Compared with the existing method of using the movable punch to receive the material by recessing the punch inside the movable punch, this invention has the advantage of quickly contacting and pushing the blank into the female mold base. It is especially suitable for short blanks, which can quickly contact and push them into the female mold base to prevent failure in receiving short blanks. At the same time, it can also ensure that the coaxiality remains accurate when short blanks quickly enter the mold cavity of the female mold base, thus having the advantages of convenience and high efficiency. Attached Figure Description

[0015] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0016] Figure 1 This is a schematic diagram of the overall structure of the stamping components of a cold heading machine;

[0017] Figure 2 This is a schematic diagram of the split structure of the stamping components of a cold heading machine;

[0018] Figure 3 This is a schematic diagram of the structure of the punch and the T-block;

[0019] Figure 4 This is a schematic diagram of the stamping components of a cold heading machine and the first state of the female die holder in the prior art;

[0020] Figure 5 This is a schematic diagram of the stamping components of a cold heading machine and the second state of the female die holder in the prior art.

[0021] Explanation of reference numerals in the attached drawings: 100, stamping component of the cold heading machine; 10, punch shell; 101, opening; 102, guide groove; 103, bearing seat; 20, movable punch; 201, shaped groove; 202, transfer groove; 203, gradually widening groove; 204, hollow groove; 30, punch; 301, gradually widening section; 302, T-block; 40, first elastic element; 50, second elastic element; 200, female die base; 2001, telescopic rod; 2002, elastic connector; 300, blank. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0023] Furthermore, in this utility model, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features.

[0024] Please refer to the following: Figures 1 to 5 As shown, Figure 1 This is a schematic diagram of the overall structure of the stamping component 100 of the cold heading machine; Figure 2 This is a schematic diagram of the split structure of the stamping component 100 of the cold heading machine; Figure 3 This is a schematic diagram of the structure of punch 30 and T-block 302; Figure 4 This is a schematic diagram of the stamping component 100 of a cold heading machine and the female die holder 200 in the prior art in the first state. Figure 5 This is a schematic diagram of the second state of the stamping component 100 of the cold heading machine and the female die holder 200 in the prior art.

[0025] This utility model provides the following technical solution: a stamping component 100 for a cold heading machine, including a punch shell 10, a movable punch 20, a punch needle 30, a first elastic element 40, and a second elastic element 50; the front end of the punch shell 10 is provided with an open opening 101 and the rear end is fixed with a support 103; the movable punch 20 is located inside the punch shell 10 and its front end protrudes outside the open opening 101; the front end of the movable punch 20 is provided with a shaped groove 201 and the rear end is provided with a hollow groove 204 communicating with the interior of the punch shell 10; the punch needle 30 is located inside the movable punch 20, and the front end of the punch needle 30 passes through the shaped groove 201 and the rear end contacts the hollow groove 204 to connect with a T-block 302; the first elastic element 40 is fixed between the movable punch 20 and the support 103; and the second elastic element 50 is fixed between the T-block 302 and the support 103.

[0026] In this embodiment, the blank 300 is held by the clamping device in the cold heading machine and aligned with the die opening of the female die holder 200 (see...). Figure 4 At this time, the transmission device in the cold heading machine rapidly drives the stamping component 100 of the cold heading machine forward. When the stamping component 100 of the cold heading machine moves forward, the punch 30 quickly pushes the blank 300 held by the clamping device into the mold cavity of the female mold base 200 (see...). Figure 5When the blank 300 is pushed into the cavity of the female mold base 200 by the punch 30, the blank 300 will push the telescopic rod 2001 inside the female mold base 200 a distance backward under the forward thrust of the punch 30. Since the elastic connector 2002 inside the female mold base 200 restricts the backward stroke of the telescopic rod 2001, the telescopic rod 2001 will not continue to move backward after it has moved backward a distance, while the punch 30 continues to push the blank 300 forward. During the process of pushing the blank 300, the punch 30 will also move backward by pushing the T-block 302 to compress the second elastic element 50 until the second elastic element 50 is compressed to its limit. The movable punch 20 will also push against the female mold base 200. During the process of the die holder 200 and the movable punch 20 pressing against the female die holder 200, the first elastic element 40 is compressed backward under the reaction force until the first elastic element 40 is compressed to the limit. At this time, under the pressure between the punch 30 and the telescopic rod 2001, one end of the blank 300 is deformed in the groove 201 of the movable punch 20, and the blank 300 is stamped. At this time, the transmission device of the cold heading machine drives the stamping part 100 of the cold heading machine to retract, and the stamped blank 300 will fall off. Finally, the punch 30 is retracted and reset by the springback of the second elastic element 50, and the movable punch 20 is retracted and reset by the springback of the first elastic element 40. In this invention, by setting a punch 30 protruding outside the movable punch 20, the punch 30 can quickly contact the blank 300 held by the clamping device and push it into the mold cavity of the female mold base 200. Compared with the existing method of using the movable punch to receive material by recessing the punch inside the movable punch, this invention has the advantage of quickly contacting and pushing the blank 300 into the female mold base 200. It is especially effective for short blanks 300, preventing failure in receiving short blanks 300. At the same time, it can also ensure that the coaxiality remains accurate when the short blank 300 quickly enters the mold cavity of the female mold base 200, thus having the advantages of convenience and high efficiency.

[0027] It is worth noting that the aforementioned clamping device, transmission device, and female mold base 200 are all components in the prior art.

[0028] In some embodiments, the punch shell 10 is provided with a transversely convex guide groove 102 that communicates with the opening 101, and the movable punch 20 is provided with a transversely convex shape, and the movable punch 20 is located in the guide groove 102 and protrudes out of the opening 101 at its front end.

[0029] In specific implementation: When the stamping component 100 of this cold heading machine completes the stamping of the blank 300 and retracts relative to the female die seat 200, the movable punch 20 will be subjected to the rebound force of the first elastic element 40 and extend forward to reset. Since the movable punch 20 is transversely convex and the guide groove 102 is transversely convex, after the movable punch 20 extends forward to reset to the standard distance in the guide groove 102 due to the rebound of the first elastic element 40, the transversely convex guide groove 102 limits the transversely convex movable punch 20 to prevent the distance of the movable punch 20 extending forward to reset from exceeding the standard value.

[0030] In some embodiments, the movable punch 20 is provided with a transfer groove 202, the front end of the transfer groove 202 is connected to the shaped groove 201 and the rear end is provided with a gradually widening groove 203 connected to the hollow groove 204; the punch 30 is located in the transfer groove 202, and the front end of the punch 30 passes through the shaped groove 201 and the rear end is provided with a gradually widening portion 301 to be located in the gradually widening groove 203.

[0031] In specific implementation: When the stamping component 100 of this cold heading machine completes the stamping of the blank 300 and retracts relative to the female die seat 200, the punch 30 is subjected to the rebound force of the second elastic element 50 and extends forward and resets in the feed groove 202. After the punch 30 extends forward and resets to the standard distance, the gradually widening groove 203 at the rear end of the feed groove 202 accommodates and limits the gradually widening part 301 at the rear end of the punch 30 to prevent the distance of the punch 30 extending forward and resetting from exceeding the standard value.

[0032] In some embodiments, the diameter of the first elastic member 40 is larger than the diameter of the second elastic member 50, and the second elastic member 50 is accommodated within the first elastic member 40.

[0033] In specific implementation: the second elastic element 50 is housed within the first elastic element 40, so that when the first elastic element 40 supports the movable punch 20 to move backward or forward, and when the second elastic element 50 supports the punch 30 to move backward or forward, the two can independently perform their supporting work without interfering with each other.

[0034] In some embodiments, both the first elastic element 40 and the second elastic element 50 are springs.

[0035] In specific implementation: both the first elastic element 40 and the second elastic element 50 are springs, so that the first elastic element 40 can effectively support the movable punch 20 to move backward or forward and the second elastic element 50 can effectively support the punch 30 to move backward or forward.

[0036] In some embodiments, the punch 30 abuts against the T-block 302.

[0037] In specific implementation: when the punch 30 retracts, the second elastic element 50 can be compressed by pushing the T block 302, or when the second elastic element 50 rebounds and extends forward, it can drive the T block 302 forward to push the punch 30 to protrude from the front end of the movable punch 20.

[0038] In some embodiments, the punch shell 10 and the bearing 103 are detachably connected.

[0039] In practice: the punch shell 10 and the bearing 103 are detachable, so that users can easily install and remove the bearing 103 from the punch shell 10, thereby facilitating the inspection or repair of the parts inside the punch shell 10.

[0040] In some embodiments, the punch shell 10 and the bearing 103 are fixed together by screws.

[0041] In practice: the punch shell 10 and the bearing 103 are fixed with screws so that the bearing 103 and the punch shell 10 can be effectively disassembled and assembled by the user.

[0042] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0043] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A stamping component of a cold heading machine, characterized in that, Includes a casing, a movable punch, a punch pin, a first elastic element, and a second elastic element; The front end of the punch shell is open and the rear end is fixed with a support. The movable punch is located inside the punch shell and its front end protrudes outside the open end. The front end of the movable punch is provided with a shaped groove and the rear end is provided with a hollow groove that communicates with the interior of the punch shell. The punch is located inside the movable punch, and the front end of the punch passes through the shaped groove and the rear end contacts the hollow groove to connect with a T-block. The first elastic element is fixed between the movable punch and the support, and the second elastic element is fixed between the T-block and the support.

2. The stamping component of the cold heading machine according to claim 1, characterized in that, The casing is provided with a transversely convex guide groove that communicates with the opening. The movable punch is transversely convex and is located in the guide groove with its front end protruding out of the opening.

3. The stamping component of the cold heading machine according to claim 1, characterized in that, The movable punch is provided with a transfer groove, the front end of which is connected to the shaped groove and the rear end of which is provided with a gradually widening groove connected to the hollow groove; the punch is located in the transfer groove, and the front end of the punch extends out of the shaped groove and the rear end is provided with a gradually widening part to correspond to the gradually widening groove.

4. The stamping component of the cold heading machine according to claim 1, characterized in that, The diameter of the first elastic element is larger than the diameter of the second elastic element, and the second elastic element is housed within the first elastic element.

5. The stamping component of the cold heading machine according to claim 1 or 4, characterized in that, Both the first elastic element and the second elastic element are springs.

6. The stamping component of the cold heading machine according to claim 1, characterized in that, The punch abuts against the T-block.

7. The stamping component of the cold heading machine according to claim 1, characterized in that, The punch shell and the bearing are detachably connected.

8. The stamping component of the cold heading machine according to claim 7, characterized in that, The punch shell and the bearing are fixed together by screws.

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