CN203227861U - Cold shearing machine - Google Patents

Abstract

The utility model provides a cold shearing machine, comprising: a frame, a shearing mechanism and a shear blade side clearance adjustment structure. Wherein, the shearing mechanism includes: an upper cutting edge and a lower cutting edge capable of relative movement. The cutting edge backlash adjustment structure includes an inclined slide plate and a slider for fixing the upper cutting edge on the inclined slide plate. The slide block is arranged in the slide block installation groove of the inclined slide plate and fixed on the inclined slide plate by screws. The cold shearing machine in the utility model sets the slider in the slider installation groove of the inclined slide, so that the friction force F received by the slider in the working process is all received by the "stop" of the installation groove of the inclined slide. To withstand, to avoid shear stress on the screw. Therefore, in the process of use, except that the slide plate needs to be replaced due to excessive wear, there will be no need to replace the screw due to shearing, which reduces the occurrence of accidents and greatly improves the operating rate of the cold shear.

Description

a cold shear

technical field

The utility model relates to a cold shearing machine for cutting bars, which belongs to the field of bar processing.

Background technique

The cold shear machine is the key equipment of the bar production line, and its function is to cut the bar according to the fixed length. In the prior art, as shown in Figure 1, the commonly used cold shears include: a frame (not shown in the figure), a shearing mechanism arranged on the frame for cutting bars, and a mechanism for adjusting the upper and lower shear blades. The side clearance adjustment structure of the cutting edge. Wherein, the shearing mechanism includes: a shearing device and a shearing driving device. The shearing device comprises: an upper knife seat 8 , a lower knife seat 9 , a lower cutting edge 14 and an upper cutting edge 15 . The shear driving device includes: a pin shaft 10 , a connecting rod 11 , a crankshaft 12 and a transmission system 13 . The lower cutting edge 14 is fixed on the frame by the lower knife seat 9 . When cutting the bar, the lower cutting edge 14 is fixed, and the transmission system 13 drives the crankshaft 12 to rotate, thereby driving the connecting rod 11 to move up and down, and then driving the upper cutting edge 15 to move up and down relative to the lower cutting edge 14. The connecting rod 11 and the sliding frame 7 are hinged through the pin shaft 10. Therefore, when the connecting rod 11 moves up and down, it will inevitably drive the sliding frame 7 to slide up and down along the surface of the slider 6. The sliding frame 7 slides up and down and finally fixes on the sliding frame 7. The upper knife rest 8 and the upper cutting edge 15 fixed on the upper knife rest 8 move up and down together to complete the shearing action of the rolled piece.

During the shearing process, the side clearance between the upper cutting edge 15 and the lower cutting edge 14 plays a vital role in the quality of the cut bar section. National standard; if the side clearance of the cutting edge is too small, the risk of interference between the upper cutting edge 15 and the lower cutting edge 14 will increase; therefore, a reasonable cutting edge backlash must be maintained between the upper cutting edge 15 and the lower cutting edge 14, usually 0.2 ~0.3mm. As shown in FIG. 1 , a common shear blade backlash adjustment structure includes: a drive assembly, a connecting piece 17 , an adjustment plate 3 and an adjustment structure. Wherein, the drive assembly is used to transmit external power to the adjustment plate 3, which includes: a screw 1 and a hand wheel 2; one end of the screw 1 is connected with the hand wheel 2, and the other end is connected with the adjustment plate 3 through a threaded connection. Due to the size limitation of the adjustment plate 3, a connecting piece 17 is usually fixed at the connecting end of the adjusting plate 3 and the screw rod 1, and one end of the connecting piece 17 is fixedly arranged on the connecting end (top) of the adjusting plate 3 by means of welding or the like, The other end of the connecting piece 17 is processed with threads for connecting with the screw 1 , preferably, the screw 1 is provided with external threads, and the connecting piece 17 is provided with internal threads. One side of the adjustment plate 3 leans against the box body 4 fixed on the frame, and the opposite side is provided with a pushing slope, and connects with the inclined slide plate 5 in the adjustment structure through the pushing slope. The adjustment structure includes: a slanted slide plate 5 , a slider 6 fixedly arranged on the slanted slide plate 5 , and a carriage 7 attached to the slide block 6 .

During work, rotate the handwheel 2 to drive the screw rod 1 to move up and down, and the screw rod 1 and the adjustment plate 3 are connected by threads. Therefore, when the screw rod 1 rotates, the adjustment plate 3 will slide up and down along the surface of the box body 4. The contact surface of the inclined slide plate 5 and the adjustment plate 3 is an inclined plane at a certain angle. As shown in Figure 2, the slider 6 and the inclined slide plate 5 are connected together by countersunk screws 16a. When the adjustment plate 3 slides up and down in the vertical direction, Push the inclined slide plate 5 and the slide block 6 to move left and right in the horizontal direction. Since the slide frame 7 and the surface of the slide block 6 are attached together, when the slide block 6 moves left and right, the slide frame 7 will also be pushed to move left and right, and the upper cutting edge 15 is fixed on the upper knife seat 8, and the upper knife seat 8 and the carriage 7 are fastened by bolts. When the carriage 7 moves left and right, the upper shearing edge 15 will be far away from or close to the lower shearing edge 14, thereby realizing the adjustment of the side of the shearing edge. gap function.

Although the above-mentioned blade side gap adjustment structure can adjust the side gap between the upper and lower blades, due to its structural limitations, there are the following problems:

As shown in Figure 2, since the slider 6 and the inclined slide plate 5 are connected and fastened by countersunk head screws 16a, this type of connection has the following disadvantages: As shown in Figure 1, when cutting the bar, the upper cutting edge is The upward shear force P and the horizontal shear force T are transmitted to the crankshaft 12 through the connecting rod 11 in the vertical direction, and the shear force T in the horizontal direction is transmitted to the slider 6 through the carriage 7 . As shown in Figure 2, when the slider 6 is subjected to the positive pressure N exerted by the carriage, a friction force F will be generated on its surface, and this friction force F is directly borne by the countersunk screw 16a. When the horizontal shear force T is larger , the greater the positive pressure N is, the greater the final friction F is, causing the countersunk screw to be sheared. In fact, in engineering applications, screws are only used to connect fastening parts, not to bear shear force. After the countersunk screw 16a was cut off, it must be replaced, and to replace the countersunk screw 16a, the slide frame 7, connecting rod 11 and upper tool holder 8 must be pulled down simultaneously before replacement. For cold shears with a shear force of more than 1000 tons, the weight of the carriage 7, the connecting rod 11 and the upper knife seat 8 is at least 10 tons, and it takes about 5 working days to replace the countersunk screw 16a, which greatly reduces the cold shear. The operating rate of the shearing machine finally restricts the production capacity of the bar rolling line.

As shown in Figures 3 and 4, in the cold shearing machine in the prior art through the blade side clearance adjustment structure, the adjustment plate 3 and the screw rod 1 are connected by threads. This type of connection has the following disadvantages:

1) Due to the manufacturing error of the parts, the axis of the threaded hole on the connecting piece 17 and the axis of the screw 1 are not on the same straight line. During assembly, the adjustment plate 3 needs to be continuously ground to ensure the threaded hole on the connecting piece 17 and the screw. 1 are on the same straight line.

2) When shearing, the adjustment plate 3 is impacted and vibrated by the shearing force, which will cause the threaded hole on the connector 17 to deviate from the original axis position, so that the axis of the threaded hole and the axis of the screw 1 are not on the same straight line. When it is necessary to adjust the side clearance of the cutting blade, the screw rod 1 and the threaded hole will produce a "competition" phenomenon, and the screw rod 1 cannot rotate freely, resulting in the inability to realize the adjustment function of the cutting blade side clearance.

3) When the threads appear "competitive", the adjustment workers may increase the rotational torque, and eventually the weld between the adjustment plate 3 and the connecting piece 17 will be broken, resulting in the inability to realize the function of adjusting the side clearance of the shear blade.

Utility model content

In order to solve the problem that the cold shearing machine in the prior art is used to connect the slider and the inclined slide plate and is easy to break through screw connection during use. The utility model provides a cold shearing machine, which makes all the friction force applied on the screw in the prior art into the force between the slider and the inclined slide plate by adjusting the connection mode between the slide block and the inclined slide plate, It greatly reduces the stress on the countersunk head screws, prolongs the service life of the screws, and greatly reduces the overall maintenance rate of the equipment.

The technical scheme provided by the utility model is:

A kind of cold shearing machine, it comprises:

frame;

A shearing mechanism arranged on the frame for cutting bars, which includes: a lower shearing edge fixed on the frame and moving up and down in the vertical direction relative to the lower shearing edge upper scissors;

The blade side gap adjustment structure for adjusting the side gap between the upper and lower blades is provided on the frame, which includes: an adjustment structure, which includes: an inclined slide plate provided with a pushing slope and used for fixing the upper blade The slider provided on the slanted slide plate is provided with a slider installation groove on the surface of the slant slide plate where the slider is arranged, and the slider is arranged in the slider installation groove;

An adjustment plate, which includes a contact slope used to cooperate with the inclined slide plate, when the adjustment plate moves up and down in the vertical direction, pushes the adjustment structure to move left and right in the horizontal direction and is arranged on the the first connection structure at the top of the adjustment board;

A drive assembly for driving the adjustment plate to move up and down in the vertical direction, which includes: a hand wheel and a screw connected to the hand wheel for transmitting the power applied to the hand wheel from the outside to the adjustment plate , one end of the screw is connected with the handwheel, and the other end is connected with the adjustment plate;

And, a connecting piece for connecting the screw rod and the adjusting plate, one end of the connecting piece is fixedly connected with the screw rod, and the other end is provided with the first connecting structure for use in cooperation with the adjusting plate and the adjusting plate The second connecting structure connected by the connecting parts.

Further, the slider is fixedly connected to the inclined slide plate through screws.

Further, the first connection structure and the second connection structure are connected in a loose fit manner in the horizontal direction.

The beneficial effect of adopting the above-mentioned further technical scheme is: the utility model shear blade side clearance adjustment structure improves the connection structure of the joint between the screw rod and the adjustment plate, and adopts a loose fit connection form to connect the screw rod and the adjustment plate, reducing the distance between the screw rod and the connecting piece. Difficulty in assembling, avoiding excess external force on the adjustment plate due to over-constraint, thereby improving the service life of the adjustment plate and the side clearance adjustment structure of the shear blade.

Further, the first connecting structure includes a T-shaped head provided at one end of the adjusting plate for connecting with the connecting plate;

The second connection structure is a T-shaped groove matching the T-shaped head formed by inwardly recessing the end surface of one end of the connecting piece used to connect with the adjustment plate;

The T-shaped head is inserted into the T-shaped slot to connect the adjusting plate and the connecting piece; and the T-shaped head is horizontally spaced between the side walls of the T-shaped slot There is a set gap, and the top end surface of the T-shaped head is in contact with the top inner wall of the T-shaped slot.

Further, the T-shaped head includes two installation grooves arranged on the side wall of the adjustment plate and a head arranged between the installation groove and the end surface of the top end of the adjustment plate; and the two installation grooves axes are parallel to each other.

Further, the cross-sections of the two installation grooves are both rectangular.

Further, the top surface of the T-shaped slot is flat, the top inner wall of the T-shaped slot is flat, and the top end surface of the T-shaped head is an arc surface.

Further, the top end surface of the T-shaped head is spherical.

Further, the connection between the connecting piece and the screw is threaded.

The beneficial effect of the utility model is that: during the shearing process of the cold shearing machine in the utility model, the friction force F generated by the slider due to the positive pressure N applied by the slider is all formed by the slider mounting groove of the inclined slide plate. "Stop" to bear, to avoid the screw to bear the shear force. Therefore, in the process of use, except that the slide plate needs to be replaced due to excessive wear, there will be no need to replace the screw due to shearing, which reduces the occurrence of accidents and greatly improves the operating rate of the cold shear.

Description of drawings

Fig. 1 shows the structural representation of cold shearing machine in the prior art;

Fig. 2 represents the connection structure schematic diagram of slide block and inclined slide plate in the prior art;

Fig. 3 shows the connection structure schematic diagram of screw rod and adjusting plate in the prior art;

Fig. 4 represents the enlarged view of place A in Fig. 3;

Fig. 5 shows the structure schematic diagram of the cold shearing machine of the utility model;

Fig. 6 shows the connection structure schematic diagram of slide block and inclined slide plate among the utility model;

Fig. 7 shows the connection structure schematic diagram of screw rod and adjusting plate in the utility model;

Figure 8 shows an enlarged view at B in Figure 7;

FIG. 9 shows a schematic structural diagram of the first connection structure;

Fig. 10 shows a schematic diagram of the second connection structure.

Detailed ways

The principles and features of the present utility model are described below in conjunction with the accompanying drawings, and the examples given are only used to explain the utility model, and are not used to limit the scope of the utility model.

The structure of the cold shear disclosed in the utility model is basically the same as the cold shear in the prior art, and its improved part is mainly the connection mode of the slider and the inclined slide plate in the blade side clearance adjustment structure, as well as the adjustment plate and the The structure of the connecting piece connecting the adjustment plate and the screw rod has been adjusted.

As shown in Figure 5, the cold shearing machine in the utility model mainly includes: including: a frame (not shown in the figure), a shearing mechanism arranged on the frame for cutting bars and an upper shearing blade for adjusting 15 and the cutting blade side clearance adjustment structure of the side clearance between the lower cutting edge 14. Wherein, the shearing mechanism includes: a shearing device and a shearing driving device. The shearing device comprises: an upper knife seat 8 , a lower knife seat 9 , a lower cutting edge 14 and an upper cutting edge 15 . The shear driving device of the cold shear includes: a pin shaft 10 , a connecting rod 11 , a crankshaft 12 and a transmission system 13 . The lower cutting edge 14 is fixed on the frame by the lower knife seat 9 . When cutting the bar, the lower cutting edge 14 is fixed, and the transmission system 13 drives the crankshaft 12 to rotate, thereby driving the connecting rod 11 to move up and down, and then driving the upper cutting edge 15 to move up and down relative to the lower cutting edge 14.

As shown in FIG. 5 , the shear blade backlash adjustment structure includes: a drive assembly, a connecting piece 17 , an adjustment plate 3 , and an adjustment structure. Wherein, the drive assembly is used to transmit external power to the adjustment plate 3, including: a screw 1 and a hand wheel 2; one end of the screw 1 is connected to the hand wheel 2, and the other end is connected to the adjustment plate 3 through a screw connection. External force turns the handwheel 2, and the screw rod 1 moves up and down in the vertical direction shown in FIG. 5 under the drive of the handwheel 2. Due to the limitation of the size of the adjusting plate 3 , a connecting piece 17 is usually fixed at the connecting end of the adjusting plate 3 and the screw 1 . As shown in Figures 7-10, one end of the connecting piece 17 used to connect with the screw 1 is processed with threads for connecting with the screw 1. Preferably, the thread arranged at one end of the connecting piece 17 is an internal thread, and the screw 1 matched therewith The thread set on is an external thread. And at the end of the connection end (top) that the adjustment plate 3 is used to be connected with the connector 17, a first connection structure is provided, and the first connection structure is a T-shaped head that is arranged at the end of the connection end of the adjustment plate 3; The shaped head includes two installation grooves 18 arranged on the side wall of the adjustment plate 3 and a head between the two installation grooves 18 and the top end of the adjustment plate 3 . Preferably, the axes of the two installation grooves 18 are parallel to each other, and their cross-sections along the vertical direction shown in the drawings are rectangular. One end of the connecting piece 17 used to connect with the adjustment plate 3 is provided with a second connection structure that matches the shape of the first connection structure. The second connection structure is T in the radial direction of the screw (vertical direction shown in the drawings). Type groove, the T-shaped groove 19 is recessed inward by the end face of one end connected by the connector 17 and the adjustment plate 3. When assembling, insert the first connection structure into the second connection structure to complete the connection between the connector 17 and the adjustment plate. 3 between the assembly. And in order to reduce the processing accuracy and assembly accuracy between the screw rod 1 and the connecting piece 17 and between the connecting piece 17 and the adjusting plate 3, after the first connecting structure is inserted into the second connecting structure to complete the assembly, the horizontal between the two The direction must be a loose fit, that is, there is a set gap in the horizontal direction between the T-shaped head and the side wall of the T-shaped groove 19; and preferably there is a larger gap between the two; the end surface of the top of the T-shaped head It is in contact with the top inner wall 20 of the T-shaped groove 19 . It can be understood that, in practical applications, there are many specific structural forms of the first connection structure and the second connection structure, for example, a hinged connection, or changing the vertical cross-sectional shape of the mounting groove 18 to a semicircle or an ellipse wait. All structural forms that can realize the connection between the connecting piece 17 and the adjustment plate 3 and are loosely connected in the horizontal direction can be applied here.

The first connecting structure and the second connecting structure adopt a loose fit in the horizontal direction to connect the connecting piece 17 and the adjusting plate 3 together, and its advantages are:

1. In the horizontal direction, there is a relatively large gap between the T-shaped slot and the two mounting slots 18. This gap can compensate for errors in parts manufacturing and ensure that the axis of the threaded hole of the connector 17 and the axis of the screw 1 are at the same time. In a straight line, the difficulty of assembly is greatly reduced.

2. In the horizontal direction, there is a large gap between the T-shaped slot and the two installation slots 18, so that when the adjustment plate 3 is subjected to the shock and vibration of the shear force, the adjustment plate 3 is allowed to have left, right, front and rear positions. The movement of the adjustment plate 3 is avoided from being over-constrained and the extra external force is applied to the adjustment plate 3, thereby improving the service life of the adjustment plate 3.

3. In the horizontal direction, there is a large gap between the T-shaped slot and the installation slot 18, so that the adjustment plate 3 can move left, right, forward and backward, and this movement will not affect the upper cutting edge 15 and the side clearance between the lower cutting edge 14. But at the same time, during the shearing process, this movement makes the connecting piece 17 not subject to external forces in other directions except the force in the vertical direction, effectively avoiding the rotation of the connecting piece 3 and the screw 1 when receiving external forces in other directions And cause adjustment plate 4 to slide up and down, finally make the phenomenon that the side gap between upper shearing edge 15 and lower shearing edge 14 cannot be fixed in the course of work.

As shown in FIG. 5 , the adjustment structure includes: an inclined slide plate 5 , a slider 6 and a carriage 7 . In order to convert the up and down reciprocating motion of the adjustment plate 3 in the vertical direction into the horizontal movement of the upper cutting edge 15, the adjustment plate 3 is provided with a push-off inclined surface 21, and the inclined slide plate 5 is provided with a push-off surface with the adjustment plate 3. The contact slope 22 used in conjunction with the slope 21, the push slope 21 and the contact slope 22 are all inclined along the vertical direction shown in the drawings, and the slopes of the two slopes match, and the direction of inclination is opposite. Preferably, the slopes of the pushing slope 21 and the contact slope 22 are the same. The box body 4 is fixedly arranged on the frame (not shown in the figure) of the cut-to-length shearing machine, the adjustment plate 3 is inserted between the box body 4 and the inclined slide plate 5, and the pushing slope 21 and the contact slope 22 are connected. In the process of moving up and down, the adjustment plate 3 always leans against the box body 4 . The sliding frame 7 is fixedly arranged on the inclined sliding plate 5 through the sliding block 6 , and is located on the surface opposite to the contacting inclined surface 22 , that is, on the side away from the adjusting plate 3 . The upper cutting edge 15 is arranged on the carriage 7 through the upper knife seat 8, and the lower cutting edge 14 is fixedly arranged on the frame (not shown in the figure) of the cold shear machine through the lower knife seat 9.

As shown in FIG. 6 , on the surface of the inclined sliding plate 5 for setting the slider 6 , that is, on the surface opposite to the contact slope 22 , a slider mounting groove 23 for setting the slider 6 is provided. During assembly, the slider 6 is arranged in the slider installation groove 23, and fixed by several screws 16, preferably; the screws 16 are countersunk screws. Preferably, the slider 6 is arranged on the surface of the inclined slide plate 5 where the slider installation groove 23 protrudes from the slider installation groove.

When adjusting the side clearance of the cutting edge, the lower cutting edge 14 is fixed. Rotate the handwheel 2 to drive the screw 1 to move up and down in the vertical direction. While the screw 1 moves up and down, the adjustment plate 3 slides up and down along the surface of the box body 4, and pushes the inclined slide plate 5 and the slider 6 to move left and right. Since the slider 7 and the slider 6 are fixedly attached together, When slide block 6 moves left and right, also will promote slide frame 7 and the upper cutting blade 15 that is fixed on it to move left and right in horizontal direction, make it stay away from or close to be fixedly arranged on the frame of shearing machine to length. The lower cutting edge 14 realizes the function of adjusting the side clearance of the cutting edge.

The connection type between the slider 6 and the inclined slide plate 5 in the utility model has at least the following advantages:

1) During the shearing process, the friction force F generated by the slider 6 due to the positive pressure N applied by the carriage 7 is all borne by the rectangular groove "stop" of the inclined slide plate 5, so as to avoid the shearing force of the screw 16 .

2) Except that the sliding plate 6 needs to be replaced due to excessive wear, there is no need to replace the screw 16 due to shearing, which reduces the occurrence of accidents and greatly improves the operating rate of the cold shear.

In a preferred embodiment of the present utility model, as shown in Figure 7-10, the top inner wall 20 of the T-shaped groove 19 is a plane, and the end face 24 of the connecting end (top end) of the T-shaped head is an arc surface; preferably, the end face 24 is a spherical surface. In practical applications, the top inner wall 20 of the T-shaped slot can also be set as an arc surface, while the end surface 24 of the T-shaped head can be set as a plane.

The advantage of using the connection mode that the arc surface meets the plane is: the top inner wall 20 of the T-shaped groove and the end face 24 of the T-shaped head are in line or point contact. The contact gap can be ideally considered to be 0. When the bar is cut, the gapless contact between the plane and the spherical surface avoids the change of the side gap between the upper and lower cutting edges due to the upward movement of the adjustment plate 3 . The work of the whole shear blade side clearance adjustment structure is made more reliable.

The above is the preferred embodiment of the present utility model. It should be pointed out that for those of ordinary skill in the art, some improvements and modifications can also be made without departing from the principle of the present utility model. These improvements and modifications should also be considered It is the protection scope of the utility model.

Claims (9)

1. a cold shears is characterized in that, comprising:

Frame;

Be arranged on the described frame cutting mechanism that is used for shearing bar, comprise the lower scissor blade that is installed on the described frame and in the vertical direction relative to described lower scissor blade in vertical direction, the upper scissor blade that descends to move;

Be arranged on and be used for regulating the blade clearance adjustment structure that goes up sideshake between the lower scissor blade on the described frame, it comprises the adjustment structure, described adjustment structure comprises the taper slide that is provided with the pushing tow inclined-plane and is used for upper scissor blade is installed in slide block on the described taper slide, described taper slide is provided with the slide block mounting groove for the surface that described slide block is set, and described slide block is arranged in the described slide block mounting groove;

Adjust plate, described adjustment plate comprises for matching with the inclined-plane that contacts of described taper slide, when described adjustment plate vertically moves up and down, the pushing tow inclined-plane of the described adjustment structure of pushing tow along continuous straight runs side-to-side movement and first syndeton that is arranged on described adjustment plate top;

Be used for driving the driven unit that described adjustment plate vertically moves up and down, comprise that handwheel and being used for of being connected with described handwheel impose on the screw rod that transmission of power on the described handwheel is given described adjustment plate with the external world, one end of described screw rod links to each other with described handwheel, and the other end links to each other with described adjustment plate;

And for the connector that connects described screw rod and described adjustment plate, described connector one end and described screw rod are connected, and the other end is provided with described first syndeton and is used, with second syndeton that described adjustment plate is linked to each other with described connector.

2. according to the described cold shears of claim 1, it is characterized in that: described slide block is fixedlyed connected with described taper slide by screw.

3. according to the described cold shears of claim 1, it is characterized in that: described first syndeton is connected in the loose fit mode in the horizontal direction with described second syndeton.

4. according to the described cold shears of claim 3, it is characterized in that: described first syndeton comprises that one is arranged at the T connector portion for an end end that is connected with described connecting plate of described adjustment plate;

Described second syndeton is the T type groove that is mated by the inside recessed T connector that form and described of the end face of an end that is used on the described connector being connected with described adjustment plate portion;

Described T connector portion inserts in the described T type groove, to connect described adjustment plate and described connector; And, described T connector portion in the horizontal direction and all exist between the sidewall of described T type groove and set the gap, the top end face of described T connector portion contacts with the top inner wall of described T type groove.

5. according to the described cold shears of claim 4, it is characterized in that: described T connector portion comprises two mounting grooves on the sidewall that is arranged on described adjustment plate and is arranged on mounting groove and adjusts head between the end face on top of plate; And the axis of two described mounting grooves is parallel to each other.

6. according to the described cold shears of claim 5, it is characterized in that: the cross section of two described mounting grooves is rectangle.

7. according to the described cold shears of claim 5, it is characterized in that: the end face of described T type groove is the plane, and the top inner wall of described T type groove is the plane, and the top end face of T connector portion is cambered surface.

8. according to the described cold shears of claim 7, it is characterized in that: the top end face of described T connector portion is sphere.

9. according to the described cold shears of claim 1, it is characterized in that: between described connector and the described screw rod for being threaded.

Images