CN220570027U - Full-automatic wire cutting bidirectional terminal crimping machine - Google Patents

Abstract

The utility model belongs to the technical field of the wire rod manufacturing technology and specifically relates to a full-automatic two-way terminal machine of beating of cutting wire, it includes the organism, be provided with on the organism and send line mechanism, tangent line mechanism, fixture and stamping mechanism, send line mechanism tangent line mechanism the fixture horizontal direction arranges in proper order, stamping mechanism is provided with two, two stamping mechanism set up respectively in tangent line mechanism's both sides, send line mechanism to be used for carrying the wire rod, tangent line mechanism is used for cutting the wire rod, fixture is used for centre gripping and shifts the wire rod, stamping mechanism is used for beating the terminal for the wire rod. The beneficial effects of this application are: the wire feeding mechanism, the wire cutting mechanism, the stamping mechanism and the clamping mechanism are matched together to realize the function of terminal crimping on two ends of the wire, so that the labor input is reduced, and the working efficiency is improved.

Description

Full-automatic wire cutting bidirectional terminal crimping machine

Technical Field

The application relates to the technical field of wire rod manufacturing, in particular to a full-automatic wire cutting bidirectional terminal crimping machine.

Background

The structure of the terminal wire generally includes a wire and a terminal, and an end of the wire and the terminal are pressed by a pressing mechanism to be integrated so as to form the terminal wire.

Because the terminal wire needs to be subjected to a plurality of working procedures such as wire stripping, wire cutting and end punching in the processing process, aiming at reducing the manual workload, targeted equipment such as an end punching machine, a wire stripping machine, a wire cutting machine and the like are more and more, so that different processing is carried out on the terminal wire respectively, but the mode needs a plurality of equipment to process step by step, more manpower is still needed, and the terminal punching operation is needed at two ends of the wire generally, the wire returns to the other end after one end is punched, the manual workload is increased, and the processing efficiency of the terminal wire is reduced.

Disclosure of Invention

In order to improve the work efficiency of beating the terminal for the wire rod, this application provides a full-automatic wire cutting two-way terminal machine of beating.

The application provides a full-automatic wire cutting two-way terminal machine that beats adopts following technical scheme:

the utility model provides a full-automatic two-way terminal machine of beating of cutting wire, includes the organism, be provided with wire feeding mechanism, tangent line mechanism, fixture and stamping mechanism on the organism, wire feeding mechanism tangent line mechanism the fixture horizontal direction arranges in proper order, stamping mechanism is provided with two, two stamping mechanism set up respectively in tangent line mechanism's both sides, wire feeding mechanism is used for carrying the wire rod, tangent line mechanism is used for cutting the wire rod, fixture is used for centre gripping and shifts the wire rod, stamping mechanism is used for beating the terminal for the wire rod.

Through adopting above-mentioned technical scheme, send line mechanism with wire rod transport to tangent line mechanism department, tangent line mechanism cooperation fixture carries out the operation of skinning to the wire rod, send line mechanism again with the wire rod of skinning completion to one of them stamping mechanism department and carry out the operation of beating the terminal, the wire rod of beating the terminal is carried through tangent line mechanism, fixture is fixed to wire rod centre gripping, tangent line mechanism cooperation fixture cuts off the operation of skinning to the wire rod, fixture carries another stamping mechanism department to wire rod other end to carry out the operation of beating the terminal, thereby realize beating the function of terminal to the wire rod both ends, work efficiency has been improved.

Preferably, the wire feeding mechanism comprises a roller group, a rotary table, a rotating roller, a wire feeding pipe, a first driving motor and a second driving motor, wherein the roller group is fixed on the machine body, the rotary table is rotatably supported on the machine body, the rotary table is positioned on one side of the roller group, the first driving motor is arranged on the machine body and positioned below the rotary table, the first driving motor drives the rotary table to rotate, the rotating roller is rotatably connected onto the rotary table, the wire feeding pipe is fixed on the rotary table, the second driving motor is fixed on the bottom of the rotary table, and the second driving motor drives the rotating roller to rotate so as to horizontally move wires.

Through adopting above-mentioned technical scheme, the wire rod tip is through the roller train, and in the live-rollers on the carousel enter into the inlet wire pipe again, carry tangential mechanism through the live-rollers rotation and process, realized the transport function to the wire rod.

Preferably, the wire cutting mechanism comprises a cutter seat, a cutter, a gear double-rack transmission structure, a third driving motor and a blowing structure, wherein the cutter seat is fixedly connected with a rack of the gear double-rack transmission structure, the cutter is fixedly connected with the cutter seat, the third driving motor drives the cutter to cut wires through the gear double-rack transmission structure, the blowing structure is fixed on the cutter seat, and the blowing structure is used for cleaning the cutter and the wires.

Through adopting above-mentioned technical scheme, third driving motor passes through the lift of gear double rack transmission structure drive cutter and cuts the wire rod, realizes the tangent line function to the wire rod, and the structure of blowing can be with the piece clean on cutter and the wire rod.

Preferably, the clamping mechanism comprises a control motor, a connecting plate and a clamping jaw cylinder, the control motor is mounted on the machine body, the control motor drives the connecting plate to rotate, the clamping jaw cylinder is fixed on the connecting plate, a lifting assembly is arranged between the clamping jaw cylinder and the connecting plate, and the lifting assembly realizes lifting adjustment of the clamping jaw cylinder.

Through adopting above-mentioned technical scheme, control motor drive connecting plate rotates for can shift stamping mechanism department behind clamping jaw cylinder centre gripping wire rod, thereby make stamping mechanism to beat the terminal operation to the wire rod, lifting unit can realize the altitude mixture control to the clamping jaw cylinder.

Preferably, the lifting assembly comprises a connecting seat, a guide rod and a sliding block, wherein the connecting seat is fixed at one end of the connecting plate, the guide rod is fixed on the connecting seat, the sliding block is connected with the guide rod in a sliding manner, and the clamping jaw cylinder is fixedly connected with the sliding block.

Through adopting above-mentioned technical scheme, the slider can slide along the direction of guide bar, because clamping jaw cylinder and slider fixed connection to realize the lift adjustment to clamping jaw cylinder.

Preferably, the stamping mechanism comprises a stamping cylinder, a sliding block, a stamping part, a tightening part and an adjusting part, wherein the stamping cylinder is arranged on the machine body, the sliding block is fixedly connected with a piston rod of the stamping cylinder, the stamping part is fixed on the sliding block, the tightening part is fixedly connected with the sliding block through the adjusting part, and the stamping part is vertically arranged in parallel with the tightening part.

Through adopting above-mentioned technical scheme, punching press cylinder drive slider goes up and down to make the stamping workpiece beat the terminal operation to the wire rod, supports tight piece and slider fixed connection through adjusting part for support tight piece and can adjust according to actual conditions.

Preferably, the adjusting piece is set to the regulating block, the regulating block is last to have seted up the regulation hole, wear to be equipped with the bolt in the regulation hole, the regulating block pass through the bolt with sliding block fixed connection, support tight piece with regulating block fixed connection.

Through adopting above-mentioned technical scheme, operating personnel accessible relieve the bolt and make the relative bolt of regulating block slide to the fixed bolt fastening regulating block of angle screwing of regulating block is again pressed tightly to the angle of regulating block, owing to support tight piece and regulating block fixed connection, thereby realizes the regulation to support tight piece angle.

Preferably, the adjusting hole is provided as an arc-shaped hole.

Through adopting above-mentioned technical scheme, set up the regulation hole into the arc hole for the sliding block slides along the pitch arc direction, thereby makes to support the tight piece and rotate certain angle and be convenient for adjust.

In summary, the present application includes at least one of the following beneficial technical effects: the wire feeding mechanism, the wire cutting mechanism, the stamping mechanism and the clamping mechanism are matched together to realize the function of terminal crimping on two ends of the wire, so that the labor input is reduced, and the working efficiency is improved.

Drawings

Fig. 1 is a schematic overall structure of an embodiment of the present application.

Fig. 2 is a schematic overall structure of another view of the embodiment of the present application.

Fig. 3 is an enlarged partial schematic view of the portion a in fig. 1.

Fig. 4 is a schematic structural view of a wire cutting mechanism in an embodiment of the present application.

Fig. 5 is a schematic diagram illustrating a matching relationship between a clamping mechanism and a lifting assembly in an embodiment of the present application.

Fig. 6 is a schematic structural view of a pressing mechanism in an embodiment of the present application.

Reference numerals illustrate: 1. a body; 2. a wire feeding mechanism; 21. a wire disc; 22. a roller set; 221. a horizontal roller set; 222. a vertical roller set; 23. a turntable; 24. a rotating roller; 25. a wire inlet pipe; 3. a thread cutting mechanism; 31. a tool apron; 32. a cutter; 321. an upper cutter; 322. a lower cutter; 33. a gear double-rack transmission structure; 34. a third driving motor; 35. a blowing structure; 4. a clamping mechanism; 41. controlling a motor; 42. a connecting plate; 43. a clamping jaw cylinder; 5. a punching mechanism; 51. a punching cylinder; 52. a sliding block; 53. stamping parts; 54. a tightening member; 55. an adjusting member; 6. a support bracket; 7. a lifting assembly; 71. a connecting seat; 72. a guide rod; 73. a slide block; 8. a mounting base; 9. a wire spool; 10. a guide frame; 11. and adjusting the hole.

Detailed Description

The present application is described in further detail below in conjunction with figures 1-6.

The embodiment of the application discloses a full-automatic wire cutting bidirectional terminal crimping machine. Referring to fig. 1 and 2, a full-automatic wire cutting bidirectional terminal crimping machine comprises a machine body 1, wherein a wire feeding mechanism 2, a wire cutting mechanism 3, a clamping mechanism 4 and a stamping mechanism 5 are arranged on the machine body 1, the wire feeding mechanism 2 is used for conveying wires, the wire cutting mechanism 3 is located at one side of the wire feeding mechanism 2 and used for cutting the wires, and the clamping mechanism 4 is located at one side of the wire cutting mechanism 3 and used for clamping and transferring the wires. The wire feeding mechanism 2, the wire cutting mechanism 3 and the clamping mechanism 4 are sequentially arranged in the horizontal direction, two stamping mechanisms 5 are arranged, and the two stamping mechanisms 5 are respectively arranged on two sides of the wire cutting mechanism 3. Wire feeding mechanism 2 carries tangent line mechanism 3 department with the wire rod, and tangent line mechanism 3 carries out the operation of skinning to the wire rod, and wire feeding mechanism 2 will skinning the wire rod that finishes and send one of them punching press mechanism 5 department to carry out and beat the terminal operation, and wire rod that beats the terminal carries through tangent line mechanism 3, and fixture 4 centre gripping is fixed to the wire rod, and tangent line mechanism 3 cooperates fixture 4 to cut off the operation of skinning to the wire rod, and fixture 4 carries another punching press mechanism 5 department to the wire rod other end and beats the terminal operation. A conveyer belt is arranged below the clamping mechanism 4, the other stamping mechanism 5 is used for completing the terminal clamping mechanism 4 on the wire rod, the two ends of the wire rod are both provided with terminals, the wire rod is transferred onto the conveyer belt, and the conveyer belt is used for conveying the wire rod to the next working procedure. The wire feeding mechanism 2, the wire cutting mechanism 3, the stamping mechanism 5 and the clamping mechanism 4 are matched together to realize the processing and manufacturing of the terminal wire, so that the labor input is reduced, and the processing efficiency of the terminal wire is improved.

Specifically, referring to fig. 1 and 3, the wire feeding mechanism 2 includes a wire guiding disc 21, a roller set 22, a turntable 23, a rotating roller 24, a wire feeding pipe 25, a first driving motor and a second driving motor, and a support bracket 6 is fixed on the machine body 1, where the support bracket 6 is horizontally arranged. The wire disc 21 is fixed in the one end of support bracket 6, and roller set 22 is fixed in on the support bracket 6, and roller set 22 includes horizontal roller set 221 and vertical roller set 222, and carousel 23 rotates and bears on organism 1, and live-rollers 24 rotate and connect on carousel 23, and live-rollers 24 are provided with two, form the gap that supplies the wire to pass between two live-rollers 24, and inlet wire pipe 25 is fixed in on carousel 23, and wire disc 21, vertical roller set 222, horizontal roller set 221, live-rollers 24 and inlet wire pipe 25 horizontal direction are arranged in proper order. The first driving motor is arranged on the machine body 1 and is positioned below the turntable 23, the turntable 23 is driven by the first driving motor to rotate, the second driving motor is fixed at the bottom of the turntable 23, and the rotating roller 24 is driven by the second driving motor to rotate so that the wire rod moves horizontally. The operator passes wire rod tip through wire guide disc 21, vertical roller group 222, horizontal roller group 221 again and wears out inlet wire pipe 25 through rotor 24, and the wire rod is carried to tangent line mechanism 3 through rotor 24 rotation and is carried out the operation of skinning, and rethread first driving motor drive carousel 23 rotates, carries out the operation of beating the terminal to stamping mechanism 5 department, and the rotation of beating the terminal carousel 23 has been completed, and rotor 24 rotates and drives the wire rod and continue to carry, has guaranteed the normal transport of wire rod.

Further, referring to fig. 1 and 4, the wire cutting mechanism 3 includes a cutter holder 31, a cutter 32, a gear double rack transmission structure 33, a third driving motor 34 and a blowing structure 35, the cutter holder 31 is fixedly connected with the rack of the gear double rack transmission structure 33, the cutter 32 is fixedly connected with the cutter holder 31, the third driving motor 34 is mounted on the machine body 1, and the third driving motor 34 drives the cutter 32 to cut wires through the gear double rack transmission structure 33. The cutters 32 include an upper cutter 321 and a lower cutter 322, the upper cutter 321 and the lower cutter 322 are all provided with three groups, the three groups of upper cutters 321 and the lower cutters 322 are horizontally arranged in parallel, wherein a group of cutters 32 positioned in the middle are longer than two groups of cutters 32 positioned at two sides, a group of cutters 32 positioned in the middle are longer in length to cut off wires, and the two groups of cutters 32 positioned at two sides are shorter in length and can not directly cut off the wires, so that the insulation layer on the surfaces of the wires can be cut off, and the peeling operation of the wires is completed. The blowing structure 35 is fixed on the tool apron 31, and the blowing structure 35 can clean the cutting knife 32 and the scraps on the wire.

The wire is peeled and cut off and then the rotating roller 24 is retracted, the peeled wire is conveyed back one end distance, the turntable 23 rotates to convey the peeled wire end to the position below one of the punching mechanisms 5, and the punching mechanism 5 performs terminal punching operation. After the terminal is finished, the rotary table 23 rotates to send the wire rod with the finished terminal back to the side of the cutter 32 again, the rotary roller 24 rotates to convey the wire rod with the finished terminal into a gap between the upper cutter 321 and the lower cutter 322 and pass through the gap, and when the wire rod with the finished terminal is conveyed to the clamping jaw cylinder 43 and stretches out for a set length, the clamping jaw cylinder 43 clamps and fixes the wire rod with the finished terminal, and the cutter 32 cuts off the wire rod with the finished terminal. The jaw cylinder 43 transfers the cut wire to the other punching mechanism 5 to perform the terminal punching operation on the other end of the wire, thereby completing the terminal punching operation on both ends of the wire.

Further, referring to fig. 2 and 5, the clamping mechanism 4 includes a control motor 41, a connection plate 42, and a clamping jaw cylinder 43, the control motor 41 is mounted on the machine body 1, one end of the connection plate 42 is fixed on an output shaft of the control motor 41, the control motor 41 drives the connection plate 42 to rotate, and the clamping jaw cylinder 43 is fixed on the other end of the connection plate 42. When the clamping jaw air cylinder 43 clamps the wire, the cutter 32 cuts the wire, the control motor 41 drives the connecting plate 42 to rotate, so that the clamping jaw air cylinder 43 clamps the wire and then can be transferred to the stamping mechanism 5, and the stamping mechanism 5 can perform terminal punching operation on the wire.

In addition, be provided with lifting unit 7 between clamping jaw cylinder 43 and the connecting plate 42, lifting unit 7 can realize the altitude mixture control to clamping jaw cylinder 43. Specifically, lifting assembly 7 includes connecting seat 71, guide bar 72 and slider 73, and connecting seat 71 is fixed in the one end of connecting plate 42, and connecting seat 71 is the U type setting, and guide bar 72 is provided with two, and two guide bars 72 are vertical to be fixed in on connecting seat 71, and slider 73 slides with two guide bars 72 to be connected, clamping jaw cylinder 43 and slider 73 fixed connection. The sliding block 73 can slide along the direction of the guide rod 72, and as the clamping jaw air cylinder 43 is fixedly connected with the sliding block 73, an operator can adjust the height of the clamping jaw air cylinder 43 by adjusting the sliding block 73, so that lifting adjustment of the clamping jaw air cylinder 43 is realized.

Further, referring to fig. 1 and 6, the stamping mechanism 5 includes a stamping cylinder 51, a sliding block 52, a stamping part 53, a abutting part 54 and an adjusting part 55, the stamping cylinder 51 is mounted on the machine body 1, the sliding block 52 is fixedly connected with a piston rod of the stamping cylinder 51, the stamping part 53 is fixed on the sliding block 52, the stamping part 53 is in a cylindrical shape, a mounting seat 8 is arranged below the stamping part 53, and the mounting seat 8 is used for mounting a terminal die. The wire spool 9 is rotationally connected to the machine body 1, the guide frame 10 is fixed to one side, located on the wire spool 9, of the machine body 1, an operator winds the terminal winding on the wire spool 9, one end of a terminal of the terminal winding penetrates into the terminal die through the guide frame 10, the stamping cylinder 51 drives the sliding block 52 to lift so that the stamping part 53 applies pressure to the terminal die, and the terminal die wraps the terminal on a wire rod to finish the terminal punching operation. In addition, the abutting piece 54 is fixedly connected with the sliding block 52 through the adjusting piece 55, the abutting piece 54 is vertically arranged in parallel with the stamping piece 53, the abutting piece 54 also descends to apply a certain pressure to the wire inlet pipe 25 when the stamping piece 53 applies pressure to the terminal die, the wire passing through the wire inlet pipe 25 abuts against the terminal die, and the abutting piece 54 can be adjusted according to actual conditions through the adjusting piece 55.

Further, the adjusting member 55 is provided as an adjusting block, the adjusting block is provided with an L-shaped adjusting hole 11, the adjusting hole 11 is provided as an arc hole, a bolt is arranged in the arc hole in a penetrating manner, one side wall of the adjusting block is fixedly connected with the sliding block 52 through the bolt, and the abutting member 54 is fixedly connected with the other side wall of the adjusting block. Specifically, the abutment 54 is provided as an elongated rod, one end of which is provided with a thread, which is in threaded engagement with the adjustment block. The operator can slide the adjusting block relative to the bolt by releasing the fixing of the adjusting block by the bolt, the adjusting block can slide along the arc direction by arranging the arc hole, so that the angle of the adjusting block is adjusted, the adjusting block is fixed by screwing the bolt, and the angle of the elongated rod is adjusted by adjusting the angle of the elongated rod due to the fixed connection of the elongated rod and the adjusting block.

The implementation principle of the full-automatic wire cutting bidirectional terminal crimping machine is as follows:

the operator passes the wire end through the wire guide disc 21, the vertical roller group 222 and the horizontal roller group 221 and then passes through the rotating roller 24 to pass through the wire inlet pipe 25, the wire is conveyed to the cutter 32 through the rotating roller 24 in a rotating way, and the cutters 32 are mutually abutted to finish the peeling and cutting operation on one end of the wire. The wire is peeled and cut off and then the rotating roller 24 is retracted, the peeled wire is conveyed back one end distance, the turntable 23 rotates to convey the peeled wire to the position below one of the punching mechanisms 5, and the punching mechanism 5 performs terminal punching operation.

After the terminal is finished, the rotary table 23 rotates to send the wire rod with the finished terminal back to the side of the cutter 32, the rotary roller 24 rotates to convey the wire rod with the finished terminal into a gap between the upper cutter 321 and the lower cutter 322 and pass through the gap, and after the wire rod with the finished terminal is conveyed to the clamping jaw cylinder 43 and stretches out for a set length, the clamping jaw cylinder 43 clamps and fixes the wire rod with one end with the finished terminal, and the cutter 32 cuts off the wire rod with one end with the finished terminal. The jaw cylinder 43 transfers the cut wire to the lower side of the other pressing mechanism 5 for the terminal crimping operation, thereby completing the machining operation of both ends of the wire. The wire feeding mechanism 2, the wire cutting mechanism 3, the stamping mechanism 5 and the clamping mechanism 4 are matched together to realize the processing and manufacturing of the terminal wire, so that the labor input is reduced, and the processing efficiency of the terminal wire is improved.

The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.

Claims (8)

1. A full-automatic wire cutting two-way terminal machine of beating which characterized in that: including organism (1), be provided with on organism (1) and send line mechanism (2), tangent line mechanism (3), fixture (4) and punching press mechanism (5), send line mechanism (2 tangent line mechanism (3) fixture (4) horizontal direction arranges in proper order, punching press mechanism (5) are provided with two, two punching press mechanism (5) set up respectively in the both sides of tangent line mechanism (3), send line mechanism (2) are used for carrying the wire rod, tangent line mechanism (3) are used for cutting wire rod, fixture (4) are used for centre gripping and transfer the wire rod, punching press mechanism (5) are used for wire rod beat the terminal.

2. The full-automatic wire-cutting bidirectional terminal crimping machine according to claim 1, wherein: wire feeding mechanism (2) are including roller train (22), carousel (23), live-rollers (24), inlet wire pipe (25), first driving motor and second driving motor, roller train (22) are fixed in on organism (1), carousel (23) rotate and bear on organism (1), carousel (23) are located one side of roller train (22), first driving motor install in on organism (1) and be located carousel (23) below, first driving motor drive carousel (23) rotate, live-rollers (24) rotate connect in on carousel (23), inlet wire pipe (25) are fixed in on carousel (23), second driving motor is fixed in the bottom of carousel (23), second driving motor drive live-rollers (24) rotate and make wire horizontal migration.

3. The full-automatic wire-cutting bidirectional terminal crimping machine according to claim 1, wherein: the wire cutting mechanism (3) comprises a cutter seat (31), a cutter (32), a gear double-rack transmission structure (33), a third driving motor (34) and a blowing structure (35), wherein the cutter seat (31) is fixedly connected with a rack of the gear double-rack transmission structure (33), the cutter (32) is fixedly connected with the cutter seat (31), the third driving motor (34) drives the cutter (32) to cut a wire through the gear double-rack transmission structure (33), the blowing structure (35) is fixed on the cutter seat (31), and the blowing structure (35) is used for cleaning the cutter (32) and the wire.

4. The full-automatic wire-cutting bidirectional terminal crimping machine according to claim 1, wherein: the clamping mechanism (4) comprises a control motor (41), a connecting plate (42) and a clamping jaw air cylinder (43), wherein the control motor (41) is installed on the machine body (1), the control motor (41) drives the connecting plate (42) to rotate, the clamping jaw air cylinder (43) is fixed on the connecting plate (42), a lifting assembly (7) is arranged between the clamping jaw air cylinder (43) and the connecting plate (42), and the lifting assembly (7) realizes lifting adjustment of the clamping jaw air cylinder (43).

5. The full-automatic wire-cutting bidirectional terminal crimping machine of claim 4, wherein: lifting assembly (7) are including connecting seat (71), guide bar (72) and slider (73), connecting seat (71) are fixed in one end of connecting plate (42), guide bar (72) are fixed in on connecting seat (71), slider (73) with guide bar (72) slide and be connected, clamping jaw cylinder (43) with slider (73) fixed connection.

6. The full-automatic wire-cutting bidirectional terminal crimping machine according to claim 1, wherein: stamping mechanism (5) are including punching press cylinder (51), slider (52), stamping workpiece (53), support tight piece (54) and regulating part (55), punching press cylinder (51) install in on organism (1), slider (52) with the piston rod fixed connection of punching press cylinder (51), stamping workpiece (53) are fixed in on slider (52), support tight piece (54) through regulating part (55) with slider (52) fixed connection, stamping workpiece (53) with support tight piece (54) vertical parallel arrangement.

7. The full-automatic wire-cutting bidirectional terminal crimping machine of claim 6, wherein: the adjusting piece (55) is arranged to be an adjusting block, an adjusting hole (11) is formed in the adjusting block, a bolt is arranged in the adjusting hole (11) in a penetrating mode, the adjusting block is fixedly connected with the sliding block (52) through the bolt, and the abutting piece (54) is fixedly connected with the adjusting block.

8. The full-automatic wire-cutting bidirectional terminal crimping machine of claim 7, wherein: the adjusting holes (11) are arc-shaped holes.